EP3010708B1 - Procédé pour courber le socle de machine d'une presse à découper et presse à découper - Google Patents

Procédé pour courber le socle de machine d'une presse à découper et presse à découper Download PDF

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Publication number
EP3010708B1
EP3010708B1 EP13736464.2A EP13736464A EP3010708B1 EP 3010708 B1 EP3010708 B1 EP 3010708B1 EP 13736464 A EP13736464 A EP 13736464A EP 3010708 B1 EP3010708 B1 EP 3010708B1
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EP
European Patent Office
Prior art keywords
machine bed
warping
press
punching
aperture
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
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EP13736464.2A
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German (de)
English (en)
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EP3010708A1 (fr
Inventor
Josef Thomas Hafner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bruderer AG
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Bruderer AG
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Publication date
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Publication of EP3010708A1 publication Critical patent/EP3010708A1/fr
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Publication of EP3010708B1 publication Critical patent/EP3010708B1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/04—Frames; Guides
    • B30B15/042—Prestressed frames
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/02—Stamping using rigid devices or tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/007—Means for maintaining the press table, the press platen or the press ram against tilting or deflection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/34—Heating or cooling presses or parts thereof

Definitions

  • the present invention relates to a method for buckling the machine bed of a punch press for at least partial compensation of a punching force-induced deflection in the punching operation and various punch presses for performing the method, according to the preambles of the independent claims.
  • a press in which support units are arranged between the press bed and the platen, which are adjustable in height. These support units can be mechanical, electromechanical or hydraulic type and operated by a controller such that a deformation of the platen is counteracted under the working pressure of the press. It is also possible, with these support units to cause a protrusion of the platen to compensate for tool types.
  • Out DE 44 15 577 A1 is a machine table with a platens for presses in the field of forming known, in which between a base plate and the platen, a plurality of hydraulic compensation pistons are arranged. There are displacement and bending sensors and a suitable control available for controlling the pressure in the compensation piston such that a deformation of the platen is counteracted under the working pressure of the press.
  • a first aspect of the invention relates to a method of warping the machine bed of a punch press which provides a breakthrough for removal of stamped parts and waste, for at least partial compensation of a punching force-related deflection of the machine bed in the punching operation.
  • forces acting transversely to the punching force direction are introduced into the machine bed and / or forces acting transversely to the punching force direction are generated in the machine bed, causing the machine bed to buckle in the direction of the press ram in such a way that it is more warped in the area adjacent to the breakthrough than in the areas adjacent to its long sides.
  • perforated machine beds of stamping presses can be spatially pre-formed with a very low investment outlay for the purpose of at least partial compensation of punching force-related deflections.
  • the machine bed is set in its lower region under compressive stress with extending in its longitudinal direction tie rods, for Verwölben same in the direction of the press ram to.
  • tie rods are arranged such that they pass through the machine bed in its lower region. This has the advantage that virtually no additional space is needed.
  • a tie rod is arranged, such that the tie rods each have a smaller distance from the opening than the respective longitudinal side of the machine bed. This can be achieved in a simple manner, a greater warping in the area of the breakthrough than in the area of the long sides.
  • a temperature gradient is generated within the machine bed or within a support structure formed with the machine bed for the lower tool parts of the press tool, by means of which the machine bed, due to locally different thermal expansion or heat shrinkage of the machine bed and / or or different thermal expansion or heat shrinkage of components of the support structure formed therewith for the lower tool parts to be arched in the direction of the press ram.
  • the temperature gradient causing the warpage is generated by heating the machine bed in the region of its side facing the press ram, wherein it is further preferred that heating is more intense in the vicinity of the boundaries of the opening than in the vicinity of the longitudinal sides of the press machine bed.
  • Local heating represents a particularly simple and economical method for generating the temperature gradient, especially as waste heat is often available free of charge in production plants.
  • the temperature gradient by cooling the machine bed in the region of its side facing away from the press ram, wherein it is further preferred that more cooling is achieved in the vicinity of the boundaries of the opening than in the vicinity of the longitudinal sides of the machine bed. This method is particularly useful when these machine components are relatively warm during operation and can be locally cooled in this way, without leading to dew point falls with condensation on the machine parts.
  • flow channels arranged within the machine bed are flowed through by a heated or cooled, gaseous or liquid medium.
  • heated lubricating oil of a lubricating oil circuit of the press can be used, which is guided by the flow channels prior to cooling.
  • the latter method has the advantage that no additional energy is needed for heating.
  • electrical heating elements are arranged within the machine bed and supplied with electric current for generating heat.
  • the temperature gradient is generated by arranging on the machine bed a clamping plate which is heated.
  • a platen is arranged on the machine bed and a heating device is arranged between the machine bed and the platen, which is heated.
  • the machine bed is heated by means of the heated platen or by means of the arranged between the machine bed and the platen heater on its side facing the plunger, with the result that there is a warping of the machine bed in the direction to come to the press ram.
  • the Platen rigidly connected to the machine bed, directly or indirectly via the heater.
  • the warping of the machine bed in the direction of the press ram can also occur exclusively as a result of an initiation of shear forces generated by a thermal expansion of the platen in the side facing the plunger of the machine bed, or due to a combination of shear forces generated by a thermal expansion of the platen in the side facing the plunger of the machine bed with a heating of the machine bed by the platen or the heater.
  • the warpage of the machine bed is adjusted in dependence on parameters of the stamping process, e.g. as a function of a previously calculated or product-specific punching force or of a maximum punching force measured during operation. Further, it is preferred that the warpage be adjusted during the intended operation of the press. In this way, the respective operating situation and any changes, for example due to increasing tool wear, are particularly well taken into account.
  • a second aspect of the invention relates to a punch press which is suitable for carrying out the method according to the first aspect of the invention.
  • the punch press has a machine bed and a press ram working against the machine bed.
  • the machine bed of the punch press has an opening for the removal of stamped parts and waste.
  • the punch press comprises means for buckling the machine bed in the direction of the press ram to by acting transversely to the punching force direction forces in the machine bed and / or by generating forces acting transversely to the punching force forces in the machine bed.
  • these funds are designed such that they Machine bed in the area adjacent to the opening more pronounced warping than in the areas adjacent to the longitudinal sides of the machine bed.
  • the means for arching the machine bed include tie rods extending longitudinally of the machine bed for compressing the machine bed in its lower portion to buckle the machine bed toward the press ram.
  • the tie rods are arranged such that they pass through the machine bed in its lower region. As a result, virtually no additional space is needed.
  • a tie rod is arranged on both sides of the opening, in particular in a symmetrical configuration, such that the tie rods each have a smaller distance from the opening than the respective longitudinal side of the machine bed. This can be achieved in a simple manner, a greater warping in the area of the breakthrough than in the area of the longitudinal sides.
  • a third aspect of the invention relates to a punch press which is suitable for carrying out the method according to the first aspect of the invention.
  • the punch press has a machine bed and a press ram working against the machine bed.
  • the machine bed of the punch press has an opening for the removal of stamped parts and waste.
  • the punch press comprises means for buckling the machine bed in Direction of the press ram to by acting transversely to the punching force acting forces in the machine bed and / or by generating forces acting transversely to the punching force forces in the machine bed.
  • these means are designed such that they warp the machine bed in the area adjacent to the opening more than in the areas adjacent to the longitudinal sides of the machine bed.
  • the means for arching the machine bed are designed for the targeted generation of a temperature gradient within the machine bed or within a supporting structure formed with the machine base for the lower tool parts, by means of which the machine bed, due to locally different thermal expansion or heat shrinkage of the machine bed and / or different thermal expansion or Heat shrinkage of components of the support structure formed therewith for the lower tool parts, in the direction of the press ram can be warped.
  • This method of generating the deformation forces has the advantage that it can be realized without having to deviate from existing and proven structural concepts. As already mentioned, this is of particular importance in the field of high-speed, high-speed stamping presses, since it often takes years of detailed work to optimize the press structures with regard to their dynamic behavior and their service life. In addition, this embodiment can be implemented with little effort even with existing presses.
  • flow channels are arranged, which can be flowed through in the intended operation of the press with a heated or cooled, gaseous or liquid medium, for generating the temperature gradient.
  • the means for warping the machine bed are designed such that the machine bed can be heated in the region of its side facing the press ram to effect the warping due to uneven heating with corresponding uneven thermal expansion of the same. It is further preferred that with these means the machine bed can be heated to a greater extent in the vicinity of the boundaries of the opening than in the vicinity of its longitudinal sides.
  • the means for buckling the machine bed are designed such that with them the machine bed in the region of its side facing away from the press ram can be cooled to effect the warping due to uneven cooling with the same uneven spatial shrinkage of the same. It is further preferred that with these means, the machine bed can be cooled in the vicinity of the boundaries of the opening stronger than in the vicinity of its longitudinal sides.
  • electrical heating elements are arranged inside the machine bed, in particular resistance heating elements, which can be supplied with electrical current in the intended operation of the press, for generating the temperature gradient causing the warping.
  • resistance heating elements which can be supplied with electrical current in the intended operation of the press, for generating the temperature gradient causing the warping.
  • one or more flow channels and / or electrical heating elements are on either side of the opening of the machine bed within arranged the machine bed, preferably such that each side of the sum of the distances of the flow channels and / or heating elements for breakthrough is smaller than the sum of the distances between the flow channels and / or heating elements to the respective longitudinal side of the machine bed. It is further preferred that the flow channels and / or heating elements are arranged symmetrically to both sides of the opening. As a result, the desired greater warping of the machine bed in the area of the breakthrough can be brought about in a simple manner.
  • a fourth aspect of the invention relates to a punch press which is suitable for carrying out the method according to the first aspect of the invention.
  • the punch press has a machine bed and a press ram working against the machine bed.
  • the machine bed of the punch press has an opening for the removal of stamped parts and waste.
  • the punch press comprises means for buckling the machine bed in the direction of the press ram to by acting transversely to the punching force direction forces in the machine bed and / or by generating forces acting transversely to the punching force forces in the machine bed.
  • these means are designed such that they warp the machine bed in the area adjacent to the opening more than in the areas adjacent to the longitudinal sides of the machine bed.
  • the means for arching the machine bed are designed for the targeted generation of a temperature gradient within the machine bed or within a supporting structure formed with the machine base for the lower tool parts, by means of which the machine bed, due to locally different thermal expansion or heat shrinkage of the machine bed and / or different thermal expansion or Heat shrinkage of components of the support structure formed therewith for the lower tool parts, in the direction of the press ram can be warped.
  • This method of generating the Deformation forces have the advantage that they can be realized without having to deviate from existing and proven structural concepts. As already mentioned, this is of particular importance in the field of high-speed, high-speed stamping presses, since it often takes years of detailed work to optimize the press structures with regard to their dynamic behavior and their service life. In addition, this embodiment can be implemented with little effort even with existing presses.
  • the punch press arranged on its machine bed on a platen, which during the normal operation of the press, in particular electrically, is heated.
  • the platen is so connected to the machine bed that the platen when heated, the machine bed heated on its side facing the plunger, to produce the warping causing temperature gradient It is further preferred that with the platen, the machine bed in the vicinity of the boundaries of the opening can be heated more than in the vicinity of its longitudinal sides.
  • a fifth aspect of the invention relates to a punch press which is suitable for carrying out the method according to the first aspect of the invention.
  • the punch press has a machine bed and a press ram working against the machine bed.
  • the machine bed of the punch press has an opening for the removal of stamped parts and waste.
  • the punch press comprises means for buckling the machine bed in the direction of the press ram to by acting transversely to the punching force direction forces in the machine bed and / or by generating forces acting transversely to the punching force forces in the machine bed.
  • these means are designed such that they the machine bed in the area adjacent to the breakthrough more warping than in the areas adjacent to the longitudinal sides of the machine bed.
  • the means for arching the machine bed are designed for the targeted generation of a temperature gradient within the machine bed or within a supporting structure formed with the machine base for the lower tool parts, by means of which the machine bed, due to locally different thermal expansion or heat shrinkage of the machine bed and / or different thermal expansion or Heat shrinkage of components of the support structure formed therewith for the lower tool parts, in the direction of the press ram can be warped.
  • This method of generating the deformation forces has the advantage that it can be realized without having to deviate from existing and proven structural concepts. As already mentioned, this is of particular importance in the field of high-speed, high-speed stamping presses, since it often takes years of detailed work here to optimize the press structures with regard to their dynamic behavior and their service life. In addition, this embodiment can be implemented with little effort even with existing presses.
  • the punch press arranged on its machine bed on a platen, which during the normal operation of the press, in particular electrically, is heated.
  • the platen is shear-stiffly connected to the machine bed, so that when heating the platen comes to a heating and corresponding expansion of the platen, which as a result of the thrust-rigid coupling of the same to the machine bed, the warping of the machine bed is effected in the direction of the press ram.
  • a thermal insulation layer is arranged between the clamping plate and the machine bed, which provides a reduction the heat transfer from the platen causes the machine bed.
  • this thermal insulation layer in the areas adjacent to the longitudinal sides of the platen and the machine bed, between the platen and the machine bed available, while in the areas adjacent to the breakthrough, a layer between the platen and the machine bed is present, which has a much better thermal conductivity, to favor a heat transfer from the platen to the machine bed in these areas. Also by this measure can be easily cause the desired greater warping of the machine bed in the breakthrough.
  • the clamping plate is connected to the machine bed in such a way that, when it is heated, it heats the machine bed on its side facing the plunger.
  • a sixth aspect of the invention relates to a punch press which is suitable for carrying out the method according to the first aspect of the invention.
  • the punch press has a machine bed and a press ram working against the machine bed.
  • the machine bed of the punch press has an opening for the removal of stamped parts and waste.
  • the punch press comprises means for arching the machine bed in the direction of the press ram to by acting transversely to the punching force forces in the machine bed and / or by generating transverse to the punching force direction acting forces in the machine bed.
  • these means are designed such that they warp the machine bed in the area adjacent to the opening more than in the areas adjacent to the longitudinal sides of the machine bed.
  • the means for arching the machine bed are designed for the targeted generation of a temperature gradient within the machine bed or within a supporting structure formed with the machine base for the lower tool parts, by means of which the machine bed, due to locally different thermal expansion or heat shrinkage of the machine bed and / or different thermal expansion or Heat shrinkage of components of the support structure formed therewith for the lower tool parts, in the direction of the press ram can be warped.
  • This method of generating the deformation forces has the advantage that it can be realized without having to deviate from existing and proven structural concepts. As already mentioned, this is of particular importance in the field of high-speed, high-speed stamping presses, since it often takes years of detailed work to optimize the press structures with regard to their dynamic behavior and their service life. In addition, this embodiment can be implemented with little effort even with existing presses.
  • the punch press on a arranged on its machine bed platen, wherein between the machine bed and the platen, a particular electric heating device is arranged, which can be operated during the intended operation of the press.
  • the heating device arranged between the clamping plate and the machine bed is connected to the machine bed in such a way that the heating device, when operated, heats the machine bed on its side facing the ram, for generating the Warping effecting temperature gradient. It is further preferred that with the heater, the machine bed can be heated more near the limits of the opening than in the vicinity of its longitudinal sides.
  • a seventh aspect of the invention relates to a punch press which is suitable for carrying out the method according to the first aspect of the invention.
  • the punch press has a machine bed and a press ram working against the machine bed.
  • the machine bed of the punch press has an opening for the removal of stamped parts and waste.
  • the punch press comprises means for buckling the machine bed in the direction of the press ram to by acting transversely to the punching force direction forces in the machine bed and / or by generating forces acting transversely to the punching force forces in the machine bed.
  • these means are designed such that they warp the machine bed in the area adjacent to the opening more than in the areas adjacent to the longitudinal sides of the machine bed.
  • the means for arching the machine bed are designed for the targeted generation of a temperature gradient within the machine bed or within a supporting structure formed with the machine base for the lower tool parts, by means of which the machine bed, due to locally different thermal expansion or heat shrinkage of the machine bed and / or different thermal expansion or Heat shrinkage of components of the support structure formed therewith for the lower tool parts, in the direction of the press ram can be warped.
  • This method of generating the deformation forces has the advantage that it can be realized without having to deviate from existing and proven structural concepts. As already mentioned, this is particularly outstanding in the field of high-speed, high-speed stamping presses Meaning, as it often takes years of detailed work to optimize the press structures in terms of their dynamic behavior and their service life. In addition, this embodiment can be implemented with little effort even with existing presses.
  • the punch press on a arranged on its machine bed platen, wherein between the machine bed and the platen, a particular electric heating device is arranged, which can be operated during the intended operation of the press.
  • the platen is shear-stiffly connected to the machine bed, directly or indirectly via the heater, so that when heating the platen or when operating the heater essentially comes to a heating and corresponding expansion of the platen, which due to the thrust-rigid coupling of the same to the machine bed the warping of the machine bed in the direction of the press ram is effected.
  • the heating device arranged between the clamping plate and the machine bed is connected to the machine bed in such a way that the heating device, when operated, heats the machine bed on its side facing the plunger in order to produce the temperature gradient causing the warping. It is wieter preferred that with the platen or the heater, the machine bed can be heated in the vicinity of the boundaries of the opening stronger than in the vicinity of its longitudinal sides.
  • the means for buckling the machine bed are adjustable, preferably during the intended operation of the press, so that a targeted and adapted to the particular operating case setting the warping of the machine bed is possible.
  • the punch press preferably has a press control, with which the warpage of the machine bed, preferably automatically, depending on parameters of the punching process is adjustable, preferably in response to a calculated or product specific punching force or measured during operation maximum punching force, preferably during the intended operation of the press.
  • Fig. 1 a punching machine with top drive is shown, wherein the machine head is shown cut with the drive 1, the plunger 2 and the slide guides 3 in the longitudinal direction, while the machine base is shown with the clamping plate 4 and the machine bed 5 is not cut.
  • Fig. 2 shows a section through the machine base of the punching machine along the line XX in Fig. 1 , as it is formed according to the prior art.
  • the clamping plate 4 is arranged on the machine bed 5 and has in the center an opening 6a, which opens in the direction of gravity in a centrally arranged in the machine bed 5 opening 6b.
  • the openings 6a, 6b are used to carry away punched parts and waste from the punching zone.
  • the machine bed 5 forms a closed cavity 7a, 7b on both sides of the opening 6b, which serves as a tank for the lubricating oil 8 of the lubricating oil circuit of the stamping machine.
  • the machine bed 5 is heated more strongly by the warm lubricating oil 8 in its lower region than in its upper region, whereby it cambers already without punching force load by different thermal expansion downwards. Under the burden The punching force causes an additional bending of the machine bed 5 during operation, and consequently a corresponding loss of precision and increased tool wear.
  • Fig. 3 shows a section through the machine base of the punching machine along the line XX in Fig. 1 as formed according to a first embodiment of the invention.
  • the outer contours of the clamping plate 4 and the machine bed 5 are identical here as in the embodiment according to Fig. 2 ,
  • the internal structure of the machine bed 5 clearly differs from that Fig. 2 ,
  • the machine bed 5 forms on both sides of the opening 6b two superimposed closed cavities 9a, 9b; 9c, 9d, of which only the upper 9a, 9c serve as a tank for the lubricating oil 8 of the lubricating oil circuit of the punching machine.
  • the machine bed 5 has three flow channels 10a, 10b, 10c arranged side by side on both sides of the opening 6b; 10d, 10e, 10f, of which in each case the flow channels 10c, 10d closest to the aperture 6b have a significantly larger flow cross-section than the other flow channels 10a, 10b, 10e, 10f.
  • the flow channels 10a-10f are flowed through in operation by the heated lubricating oil 8 of the lubricating oil circuit of the stamping machine, which is then passed into the cavities 9a, 9c, from where it with the lubricating oil pump of the lubricating oil circuit, possibly after passing through a cooler, again to the lubrication points of the Punching machine is performed.
  • the warm lubricating oil 8 is first passed through the flow channels 10c, 10d closest to the opening 6b, then through the middle flow channels 10b, 10e and finally through the outer flow channels 10a, 10f, where it gives off heat to the machine bed 5.
  • the machine bed 5 is in operation in its upper Warmer area warmed more than in its lower portion, causing it due to differential thermal expansion upwards and thus warped in the direction of the plunger 2.
  • the machine bed 5 due to the order of flow through the flow channels and the different flow channel cross-sections in the areas adjacent to the opening 6b is heated more than in the areas of its longitudinal sides, resulting in a greater Verwölbung the same upwards in the areas adjacent to the opening 6b leads than in the areas of its long sides.
  • the clamping plate 4 which is fastened with a plurality of screws on the machine bed 5, follows the warping of the machine bed 5.
  • the machine bed 5 ideally under maximum Stanzkraftbelastung both longitudinally and transversely flat, ie not warped or not bent, is.
  • a loss of punching precision and increased tool wear can be effectively counteracted.
  • Fig. 4 shows a section through the machine base of the punching machine along the line XX in Fig. 1 as formed according to a second embodiment of the invention.
  • the outer contours of the clamping plate 4 and the machine bed 5 are identical as in the embodiment according to Fig. 2
  • the internal structure of the machine bed 5 is identical to that of the machine bed Fig. 2
  • an intermediate plate 11 is arranged between the clamping plate 4 and the machine bed 5 with a plurality of flow channels 10a-10l, which are flowed through in operation by a hot water circuit, eg from a recooling device of the lubricating oil circuit of the punching machine.
  • the machine bed 5 bends more strongly upwards in the areas adjacent to the opening 6b than in the areas of the longitudinal sides which less strongly heated by the outer flow channels 10a, 10b, 10k, 101.
  • Fig. 5 shows a section through the machine base of the punching machine along the line XX in Fig. 1 , as formed according to a third embodiment of the invention.
  • the outer contours of the clamping plate 4 and the machine bed 5 are substantially identical as in the embodiment according to Fig. 2 and also the internal structure of the machine bed 5 is substantially identical to that of the machine bed Fig. 2 ,
  • the machine bed 5 is penetrated in its lower region by two extending in the longitudinal direction of the machine bed tie rods 19, with which the machine bed 5 is placed in its lower region under compressive stress, for buckling of the machine bed 5 in the direction of the press ram 2.
  • the tie rods 19 are arranged symmetrically on both sides of the opening 6b of the machine bed 5, such that they each have a smaller distance from the opening 6b than to the respective longitudinal side of the machine bed 5.
  • the tie rod 19 is placed under compressive stress most closely to the boundary walls of the aperture 6b of the machine bed 5 by the tie rods 19, the machine bed 5 buckles more upward in the areas adjacent to the aperture 6b than in Figs Areas of the long sides.
  • compensation for this warping occurs, which ideally leads to the machine bed 5 being flat under maximum punching load in both the longitudinal and transverse direction, ie not warped or not bent.
  • the tie rods 19 are each set between a nut 12 and an adjustable biasing device 13, 14, 15, 16, 17, 18 under tension.
  • the biasing device 13, 14, 15, 16, 17, 18 comprises a clamping nut 13 with an actuating arm 16, which can be rotated by a hydraulic cylinder 15 by about 90 °, for adjusting the tension of the tie rod 19, and a discharge device with a hydraulic Piston / cylinder arrangement 14, 17, 18, by means of which the tie rod 19 can be preloaded temporarily hydraulically, to relieve the clamping nut 13 when setting the same.
  • the hydraulic piston / cylinder assembly 14, 17, 18 is switched ineffective for the operation of the press.
  • a strain gauge 20 is arranged below each tie rod 19, by means of which the length reduction of the machine bed 5 can be measured in this area due to the pressure voltage applied by the tie rods 19.
  • This third embodiment of the invention has the advantage that the setting of the warpage of the machine bed 5 is free of delay and that the deformation forces and the resulting deformations of the machine bed 5 are easily controllable.

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  • Mechanical Engineering (AREA)
  • Presses And Accessory Devices Thereof (AREA)
  • Press Drives And Press Lines (AREA)

Claims (37)

  1. Procédé pour cintrer le bâti de machine (5) d'une presse de poinçonnage pour compenser au moins partiellement une flexion causée par la force de poinçonnage en opération de poinçonnage, le bâti de machine (5) ayant une percée (6b) pour éloigner des pièces découpées et des déchets,
    caractérisé en ce que des forces qui actionnent de manière transversale à la direction de la force de poinçonnage sont introduites dans le bâti de machine (5) ou sont générées dans le bâti de machine (5), afin de cintrer le bâti de machine (5) en direction vers le coulisseau (2) de sorte que le bâti de machine (5) est plus cintré dans la zone voisine de la percée (6b) que dans les zones voisines de ses faces longitudinales.
  2. Procédé selon la revendication 1, le bâti de machine (5) étant mis en contrainte de compression dans sa section basse avec des tirants d'ancrage (19) qui s'étendent dans sa direction longitudinale, afin de cintrer le même en direction vers le coulisseau (2).
  3. Procédé selon la revendication 2, le tirant d'ancrage (19) étant arrangé de sorte qu'il traverse le bâti de machine (5) dans sa section basse.
  4. Procédé selon l'une des revendications 1 à 3, un tirant d'ancrage (19) étant arrangé de chacune des deux côtés de la percée (6b) du bâti de machine (5), particulièrement de manière symétrique par rapport aux deux côtés de la percée (6b), de sorte que le tirant d'ancrage (19) est à une plus petite distance de la percée (6b) que la correspondante face longitudinale du bâti de machine (5).
  5. Procédé selon l'une des revendications précédentes, un gradient de température étant généré à l'intérieur du bâti de machine (5) ou bien d'une structure de support (4, 5, 11) formée avec le bâti de machine (5) pour les parties d'outil basses, par lequel le bâti de machine (5) est cintré en direction du coulisseau (2).
  6. Procédé selon la revendication 5, le gradient de température étant généré par chauffage du bâti de machine (5) dans la zone de son côté situé en face du coulisseau (2).
  7. Procédé selon la revendication 6, le bâti de machine (5) étant chauffé plus dans le voisinage des bordures de la percée (6b) que dans le voisinage de ses faces longitudinales.
  8. Procédé selon l'une des revendications 5 à 7, le gradient de température étant généré par refroidissement du bâti de machine (5) dans la zone de son côté opposée au coulisseau (2).
  9. Procédé selon la revendication 8, le bâti de machine étant refroidi plus dans le voisinage des bordures de la percée que dans le voisinage de ses faces longitudinales.
  10. Procédé selon l'une des revendications 5 à 9, des canaux d'écoulement (10a-10f), arrangés à l'intérieur du bâti de machine (5), étant parcourus par un médium (8) gazeux ou liquide chauffé ou refroidi afin de générer le gradient de température.
  11. Procédé selon la revendication 10, un lubrifiant chauffé (8) d'un circuit de lubrifiant de la presse étant guidé à travers les canaux d'écoulement (10a-10f).
  12. Procédé selon l'une des revendications 5 à 11, des éléments de chauffage électriques arrangés à l'intérieur du bâti de machine étant chargés avec un courant électrique afin de générer le gradient de température.
  13. Procédé selon l'une des revendications 5 à 12, une plaque de fixation arrangée sur le bâti de machine étant présente, la plaque de fixation étant chauffée afin de cintrer le bâti de machine dans la direction du coulisseau à cause d'un chauffage du même à l'aide de la plaque de fixation de son côté en face du coulisseau et/ou afin de cintrer le bâti de machine dans la direction du coulisseau à cause d'une introduction de forces de poussée, générées par une expansion thermique de la plaque de fixation, du côté du bâti de machine qui est en face du coulisseau.
  14. Procédé selon l'une des revendications 5 à 11, une plaque de fixation (4) arrangée sur le bâti de machine (5) étant présente et un dispositif de chauffage (11) arrangé entre le bâti de machine (5) et la plaque de fixation (4), la plaque étant chauffée afin de cintrer le bâti de machine (5) dans la direction du coulisseau (2) à cause d'un chauffage du même à l'aide du dispositif de chauffage (11) de son côté en face du coulisseau (2) et/ou afin de cintrer le bâti de machine (5) dans la direction du coulisseau (2), à cause d'un chauffage de la plaque de fixation (4) par le dispositif de chauffage (11) et d'une introduction des forces de poussée, générées par une expansion thermique de la plaque de fixation (4), du côté du bâti de machine (5) qui est en face du coulisseau (2).
  15. Procédé selon l'une des revendications précédentes, le cintrage du bâti de machine étant ajusté dépendant des paramètres du processus de poinçonnage, particulièrement dépendant d'une force maximale calculée ou mesurée, particulièrement le cintrage étant ajusté pendant l'opération prévue de la presse.
  16. Presse de poinçonnage pour la mise en oeuvre du procédé selon la revendication 1, avec un bâti de machine (5) et avec un coulisseau (2) qui actionne contre le bâti de machine (5),
    des moyens (8, 9a, 9c, 10a-10f; 10a-10l, 11; 12-19) étant présents pour cintrer le bâti de machine (5) dans la direction du coulisseau (5) par introduction des forces qui actionnent de manière transversale à la direction de la force de poinçonnage dans le bâti de machine (5) et/ou par génération des forces qui actionnent de manière transversale à la direction de la force de poinçonnage dans le bâti de machine (5),
    le bâti de machine (5) ayant une percée (6b) pour éloigner des pièces découpées et des déchets et les moyens (8, 9a, 9c, 10a-10f; 10a-10l, 11; 12-19) pour cintrer le bâti de machine (5) étant formés de sorte qu'ils cintrent le bâti de machine (5) plus dans la zone voisine de la percée (6b) que dans les zones voisines des faces longitudinales du bâti de machine (5),
    et les moyens (12-19) pour cintrer le bâti de machine comprenant des tirants d'ancrage (19) qui s'étendent dans la direction longitudinale du bâti de machine, à l'aide desquels le bâti de machine (5) peut être mis en contrainte de compression dans sa section basse, afin de cintrer le bâti de machine (5) dans la direction du coulisseau (2).
  17. Presse de poinçonnage selon la revendication 16, le tirant d'ancrage (19) traversant le bâti de machine (5) de son côté bas.
  18. Presse de poinçonnage selon l'une des revendications 16 à 17, un tirant d'ancrage (19) étant arrangé de chaque côté de la percée (6b) du bâti de machine (5), de sorte que chaque tirant d'ancrage (19) est à une plus petite distance de la percée (6b) que de la correspondante face longitudinale du bâti de machine (5).
  19. Presse de poinçonnage selon la revendication 18, les deux tirants d'ancrage (19) étant arrangés de manière symétrique par rapport aux deux côtés de la percée (6b).
  20. Presse de poinçonnage pour la mise en oeuvre du procédé selon la revendication 1, avec un bâti de machine (5) et avec un coulisseau (2) qui actionne contre le bâti de machine (5),
    des moyens (8, 9a, 9c, 10a-10f; 10a-10l, 11; 12-19) étant présents pour cintrer le bâti de machine (5) dans la direction du coulisseau (5) par introduction des forces qui actionnent de manière transversale à la direction de la force de poinçonnage dans le bâti de machine (5) et/ou par génération des forces qui actionnent de manière transversale à la direction de la force de poinçonnage dans le bâti de machine (5),
    le bâti de machine (5) ayant une percée (6b) pour éloigner des pièces découpées et des déchets et les moyens (8, 9a, 9c, 10a-10f; 10a-10l, 11 ; 12-19) pour cintrer le bâti de machine (5) étant formés pour chauffer le bâti de machine (5) plus dans la zone de son côté en face du coulisseau (2) que dans le voisinage de ses faces longitudinales,
    les moyens (8, 9a, 9c, 10a-10f; 10a-10l, 11) pour cintrer le bâti de machine (5) étant adaptées à générer un gradient de température à l'intérieur du bâti de machine (5) ou bien d'une structure de support (4, 5; 4, 5, 11) pour les parties d'outil basses, afin de générer les forces qui actionnent de manière transversale à la direction de la force de poinçonnage pour cintrer le bâti de machine (5) dans la direction du coulisseau,
    les moyens (8, 9a, 9c, 10a-10f) pour cintrer le bâti de machine (5) comprenant des canaux d'écoulement (10a-10f), arrangés à l'intérieur du bâti de machine (5), et étant parcourus par un médium (8) gazeux ou liquide chauffé ou refroidi en opération comme prévu, afin de générer le gradient de température
    et la presse comprenant un circuit de lubrifiant et les moyens pour cintrer le bâti de machine comprenant des dispositifs par lesquels du lubrifiant chauffé du circuit de lubrifiant peut être guidé à travers les canaux d'écoulement (10a-10f) en opération comme prévu.
  21. Presse de poinçonnage selon la revendication 20, les moyens (8, 9a, 9c, 10a-10f; 10a-101, 11) pour cintrer le bâti de machine (5) étant formés pour chauffer le bâti de machine (5) dans la zone de son côté situé en face du coulisseau (2).
  22. Presse de poinçonnage selon la revendication 21, les moyens (8, 9a, 9c, 10a-10f; 10a-10l, 11) pour cintrer le bâti de machine (5) étant formés pour chauffer le bâti de machine (5) plus dans la zone de son côté en face du coulisseau (2) que dans le voisinage de ses faces longitudinales.
  23. Presse de poinçonnage selon l'une des revendications 20 à 22, les moyens pour cintrer le bâti de machine étant adaptés à refroidir le bâti de machine dans la zone de son côté opposé au coulisseau.
  24. Presse de poinçonnage selon la revendication 23, les moyens pour cintrer le bâti de machine étant adaptés à refroidir le bâti de machine plus dans la zone de son côté opposé au coulisseau dans le voisinage des bordures de la percée que dans le voisinage de ses faces longitudinales.
  25. Presse de poinçonnage selon l'une des revendications 20 à 24, les moyens pour cintrer le bâti de machine comprenant des éléments électriques de chauffage arrangés à l'intérieur du bâti de machine, qui sont alimentables avec un courant électrique afin de générer le gradient de température en opération comme prévu.
  26. Presse de poinçonnage selon l'une des revendications 20 à 25, un ou plusieurs canaux d'écoulement et/ou des éléments électriques de chauffage étant arrangés des deux côtés de la percée du bâti de machine dans le bâti de machine, de sorte que par face la somme des distances entre les canaux d'écoulement et/ou les éléments de chauffage et la percée est plus petite que la somme des distances entre les canaux d'écoulement et/ou les éléments de chauffage et la correspondante face longitudinale du bâti de machine.
  27. Presse de poinçonnage selon la revendication 26, les canaux d'écoulement et/ou les éléments de chauffage étant arrangés de manière symétrique aux deux côtés de la percée.
  28. Presse de poinçonnage pour la mise en oeuvre du procédé selon la revendication 1, avec un bâti de machine (5) et avec un coulisseau (2) qui actionne contre le bâti de machine (5),
    des moyens (8, 9a, 9c, 10a-10f; 10a-10l, 11; 12-19) étant présents pour cintrer le bâti de machine (5) dans la direction du coulisseau (5) par introduction des forces qui actionnent de manière transversale à la direction de la force de poinçonnage dans le bâti de machine (5) et/ou par génération des forces qui actionnent de manière transversale à la direction de la force de poinçonnage dans le bâti de machine (5),
    le bâti de machine (5) ayant une percée (6b) pour éloigner des pièces découpées et des déchets et les moyens (8, 9a, 9c, 10a-10f; 10a-10l, 11; 12-19) pour cintrer le bâti de machine (5) étant formés de manière à cintrer plus le bâti de machine (5) dans la zone voisine de la percée (6b) que dans les zones voisines des faces longitudinales du bâti de machine (5),
    les moyens (8, 9a, 9c, 10a-10f ; 10a-10l, 11) pour cintrer le bâti de machine (5) étant adaptés à générer un gradient de température à l'intérieur du bâti de machine (5) ou bien d'une structure de support (4, 5; 4, 5, 11) pour les parties d'outil basses, afin de générer les forces qui actionnent de manière transversale à la direction de la force de poinçonnage pour cintrer le bâti de machine dans la direction du coulisseau
    et une plaque de fixation arrangée sur le bâti de machine étant présente, la plaque de fixation étant chauffée par les moyens de cintrer du bâti de machine pendant l'opération prévue de la presse, afin de générer le gradient de température par chauffage du bâti de machine de son côté qui est en face du coulisseau, à l'aide de la plaque de fixation.
  29. Presse de poinçonnage pour la mise en oeuvre du procédé selon la revendication 1, avec un bâti de machine (5) et avec un coulisseau (2) qui actionne contre le bâti de machine (5),
    des moyens (8, 9a, 9c, 10a-10f; 10a-10l, 11; 12-19) étant présents pour cintrer le bâti de machine (5) dans la direction du coulisseau (5) par introduction des forces qui actionnent de manière transversale à la direction de la force de poinçonnage dans le bâti de machine (5) et/ou par génération des forces qui actionnent de manière transversale à la direction de la force de poinçonnage dans le bâti de machine (5),
    le bâti de machine (5) ayant une percée (6b) pour éloigner des pièces découpées et des déchets et les moyens (8, 9a, 9c, 10a-10f; 10a-10l, 11; 12-19) pour cintrer le bâti de machine (5) étant formés de manière à cintrer plus le bâti de machine (5) dans la zone voisine de la percée (6b) que dans les zones voisines des faces longitudinales du bâti de machine (5),
    les moyens (8, 9a, 9c, 10a-10f ; 10a-10l, 11) pour cintrer le bâti de machine (5) étant adaptés à générer un gradient de température à l'intérieur du bâti de machine (5) ou bien d'une structure de support (4, 5; 4, 5, 11) pour les parties d'outil basses, afin de générer les forces qui actionnent de manière transversale à la direction de la force de poinçonnage pour cintrer le bâti de machine dans la direction du coulisseau
    et une plaque de fixation (4) arrangée sur le bâti de machine étant présente, la plaque de fixation étant chauffée par les moyens (8, 9a, 9c, 10a-10f ; 10a-101, 11) de cintrer du bâti de machine (5) pendant l'opération prévue de la presse, et étant connectée avec le bâti de machine (5) de sorte qu'elle puisse transférer des forces de poussée sur le bâti de machine (5), afin de cintrer le bâti de machine (5) dans la direction du coulisseau (2) par la suite d'une introduction des forces de poussée générées par une expansion thermique de la plaque de fixation (4), du côté du bâti de machine (5) qui est en face du coulisseau (2).
  30. Presse de poinçonnage selon la revendication 29, une couche d'isolation thermique étant présente entre la plaque de fixation et le bâti de machine, afin de réduire un transfert de chaleur de la plaque de fixation au bâti de machine.
  31. Presse de poinçonnage selon la revendication 30, la couche d'isolation thermique étant présente, dans les zones voisines aux faces longitudinales de la plaque de fixation ou bien du bâti de machine, entre la plaque de fixation ou bien le bâti de machine, et une couche étant présente entre la plaque de fixation ou bien le bâti de machine, qui a une conductivité thermique bien meilleure afin de favoriser un transfert de chaleur de la plaque de fixation au bâti de machine dans ces zones.
  32. Presse de poinçonnage selon l'une des revendications 28 à 31, la plaque de fixation étant chauffable par les moyens de cintrage du bâti de machine pendant l'opération comme prévu de la presse de manière à être plus chaude dans les zones voisines à la percée que dans les zones voisines à sa face longitudinale.
  33. Presse de poinçonnage pour la mise en oeuvre du procédé selon la revendication 1, avec un bâti de machine (5) et avec un coulisseau (2) qui actionne contre le bâti de machine (5),
    des moyens (8, 9a, 9c, 10a-10f; 10a-10l, 11; 12-19) étant présents pour cintrer le bâti de machine (5) dans la direction du coulisseau (5) par introduction des forces qui actionnent de manière transversale à la direction de la force de poinçonnage dans le bâti de machine (5) et/ou par génération des forces qui actionnent de manière transversale à la direction de la force de poinçonnage dans le bâti de machine (5),
    le bâti de machine (5) ayant une percée (6b) pour éloigner des pièces découpées et des déchets et les moyens (8, 9a, 9c, 10a-10f; 10a-10l, 11; 12-19) pour cintrer le bâti de machine (5) étant formés de manière à cintrer plus le bâti de machine (5) dans la zone voisine de la percée (6b) que dans les zones voisines des faces longitudinales du bâti de machine (5),
    les moyens (8, 9a, 9c, 10a-10f; 10a-10l, 11) pour cintrer le bâti de machine (5) étant adaptés à générer un gradient de température à l'intérieur du bâti de machine (5) ou bien d'une structure de support (4, 5; 4, 5, 11) pour les parties d'outil basses, afin de générer les forces qui actionnent de manière transversale à la direction de la force de poinçonnage pour cintrer le bâti de machine (5) dans la direction du coulisseau (2)
    et une plaque de fixation (4) arrangée sur le bâti de machine (5) étant présente, les moyens (10a-101, 11) pour cintrer le bâti de machine (5) comprenant entre le bâti de machine (5) et la plaque de fixation (4) une installation de chauffage (11) qui est opérable pendant l'opération comme prévu de la presse pour cintrer le bâti de machine (5) de son côté en face du coulisseau (2) à cause d'un chauffage du même.
  34. Presse de poinçonnage pour la mise en oeuvre du procédé selon la revendication 1, avec un bâti de machine (5) et avec un coulisseau (2) qui actionne contre le bâti de machine (5),
    des moyens (8, 9a, 9c, 10a-10f; 10a-10l, 11; 12-19) étant présents pour cintrer le bâti de machine (5) dans la direction du coulisseau (5) par introduction des forces qui actionnent de manière transversale à la direction de la force de poinçonnage dans le bâti de machine (5) et/ou par génération des forces qui actionnent de manière transversale à la direction de la force de poinçonnage dans le bâti de machine (5),
    le bâti de machine (5) ayant une percée (6b) pour éloigner des pièces découpées et des déchets et les moyens (8, 9a, 9c, 10a-10f; 10a-10l, 11; 12-19) pour cintrer le bâti de machine (5) étant formés de manière à cintrer plus le bâti de machine (5) dans la zone voisine de la percée (6b) que dans les zones voisines des faces latérales du bâti de machine (5),
    les moyens (8, 9a, 9c, 10a-10f; 10a-10l, 11) pour cintrer le bâti de machine (5) étant adaptés à générer un gradient de température à l'intérieur du bâti de machine (5) ou bien d'une structure de support (4, 5; 4, 5, 11) pour les parties d'outil basses, afin de générer les forces qui actionnent de manière transversale à la direction de la force de poinçonnage pour cintrer le bâti de machine dans la direction du coulisseau
    et une plaque de fixation (4) arrangée sur le bâti de machine étant présente, qui est connectée avec le bâti de machine (5) de manière à pouvoir transférer des forces de poussée au bâti de machine (5), et les moyens (10a-101, 11) pour cintrer le bâti de machine (5) comprenant entre le bâti de machine (5) et la plaque de fixation (4) une installation de chauffage (11) qui est opérable pendant l'opération comme prévu de la presse pour cintrer le bâti de machine (5) à cause d'une introduction de forces de poussée, générées par une expansion thermique de la plaque de fixation (4), du côté en face du coulisseau (2).
  35. Presse de poinçonnage selon l'une des revendications 33 à 34, le dispositif de chauffage (11) arrangé entre le bâti de machine (5) et la plaque de fixation (4) étant formée de sorte qu'avec elle les zones du bâti de machine (5) ou bien de la plaque de fixation (4), qui sont voisines à la percée (6b), peuvent être chauffées plus que les zones du bâti de machine (5) ou bien de la plaque de fixation (4), qui sont voisines à ses faces longitudinales.
  36. Presse de poinçonnage selon l'une des revendications 16 à 35, les moyens pour cintrer le bâti de machine étant ajustables, particulièrement pendant l'opération comme prévu de la presse, pour permettre un ajustage spécifique du cintrage du bâti de machine.
  37. Presse de poinçonnage selon l'une des revendications 16 à 36, la presse de poinçonnage comprenant une commande de presse à l'aide de laquelle le cintrage du bâti de machine peut être ajusté dépendant de paramètres du processus de cintrage, particulièrement automatiquement, particulièrement dépendant d'une force de poinçonnage maximale calculée ou mesurée, et particulièrement étant ajustable pendant l'opération comme prévu de la presse.
EP13736464.2A 2013-06-19 2013-06-27 Procédé pour courber le socle de machine d'une presse à découper et presse à découper Not-in-force EP3010708B1 (fr)

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PCT/CH2013/000107 WO2014201576A1 (fr) 2013-06-19 2013-06-19 Procédé pour courber le socle de machine et/ou le coulisseau de presse d'une presse à découper et presse à découper
PCT/CH2013/000114 WO2014201577A1 (fr) 2013-06-19 2013-06-27 Procédé pour courber le socle de machine d'une presse à découper et presse à découper

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EP3010708A1 EP3010708A1 (fr) 2016-04-27
EP3010708B1 true EP3010708B1 (fr) 2017-12-20

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EP13736464.2A Not-in-force EP3010708B1 (fr) 2013-06-19 2013-06-27 Procédé pour courber le socle de machine d'une presse à découper et presse à découper

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ES2363316T3 (es) * 2009-02-20 2011-07-29 THEODOR GRABENER GMBH & CO. KG Dispositivo para la fabricación de piezas conformadas.
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US20160144588A1 (en) * 2013-06-19 2016-05-26 Bruderer Ag Method for warping the machine bed and/or the press ram of a punching press and punching press

Also Published As

Publication number Publication date
SG11201510310VA (en) 2016-01-28
EP3010709B1 (fr) 2022-06-01
EP3010709A1 (fr) 2016-04-27
WO2014201577A1 (fr) 2014-12-24
US20160144588A1 (en) 2016-05-26
US20160136710A1 (en) 2016-05-19
JP6192820B2 (ja) 2017-09-06
WO2014201576A1 (fr) 2014-12-24
SG11201510311QA (en) 2016-01-28
EP3010708A1 (fr) 2016-04-27
JP2016523715A (ja) 2016-08-12
JP6192821B2 (ja) 2017-09-06
JP2016524540A (ja) 2016-08-18
ES2663233T3 (es) 2018-04-11

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