EP2030772A2 - Dispositif de sécurité sur des machines de formage - Google Patents

Dispositif de sécurité sur des machines de formage Download PDF

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Publication number
EP2030772A2
EP2030772A2 EP08015429A EP08015429A EP2030772A2 EP 2030772 A2 EP2030772 A2 EP 2030772A2 EP 08015429 A EP08015429 A EP 08015429A EP 08015429 A EP08015429 A EP 08015429A EP 2030772 A2 EP2030772 A2 EP 2030772A2
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EP
European Patent Office
Prior art keywords
ram
press
press ram
safety device
lever
Prior art date
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.)
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Application number
EP08015429A
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German (de)
English (en)
Other versions
EP2030772A3 (fr
Inventor
Oskar Gechter
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP2030772A2 publication Critical patent/EP2030772A2/fr
Publication of EP2030772A3 publication Critical patent/EP2030772A3/fr
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/10—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by toggle mechanism
    • B30B1/16—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by toggle mechanism operated by fluid-pressure means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/28—Arrangements for preventing distortion of, or damage to, presses or parts thereof
    • B30B15/285—Arrangements for preventing distortion of, or damage to, presses or parts thereof preventing a full press stroke if there is an obstruction in the working area

Definitions

  • the invention relates to a safety device to forming machines with a drive ram and a force acting on these booster, in particular on pneumatic presses, with a longitudinally displaceable mounted in a guide press ram, with a pressing tool at its lower end to a lower punch and wegbewegbar is, where on the last path of the press ram with a distance to the lower punch of eg ⁇ 5.9 mm to 0 mm, if there is no obstacle between the pressing tool and the lower punch, the drive ram transmits the pressing force to the press ram via coupling means to carry out the pressing operation, but hinders the press ram if it can not travel the last distance, e.g. in the presence of a finger in the press nip, the pressing process is prevented, according to the preamble of claim 1.
  • Such a safety device is by the WO 98/16371 or the corresponding one EP 0 930 963 B1 essentially known. If in the known safety device an obstacle, such as a finger, is in the press nip, the power transmission is blocked by the drive ram on a lever-like part on the press ram by the lever-like part is clamped or keyed with a toothed end to a rack of the press frame , In a trouble-free stroke, however, a meshing intervention does not occur; instead, at the end of the movement stroke, a proximity sensor emits the signal: "Initiate power stroke"; The lever-like part engages under a paragraph on a longitudinal groove of the rack and can thus transmit the pressing force on the press ram in the further movement of the drive ram.
  • the known device is relatively complicated; a force-transmitting part must be wedged in case of danger, it is worked with a proximity sensor.
  • the invention has for its object to provide a safety device according to the preamble of claim 1, in which also an obstacle in the press gap leads to an instantaneous non-initiation of the power stroke, but in which the blocking of the power flow by wedging a force-transmitting Levers is not required.
  • this object is achieved in a generic safety device by the features specified in the characterizing part of claim 1, namely the fact that the drive ram has a driver extension on a driver body and the press ram is provided with a hubrank more or less extensible in the direction driver extension coupling member wherein in the case of obstruction of the press ram to the execution of his last path, the range of action of the coupling member is not sufficient and the drive ram past this drive unpowered, while at trouble-free stroke of the press ram, the deflection of the coupling member is so large that this for transmitting the driving force from the drive joints on The press ram is captured by the driver extension and taken along during the working stroke on the last distance.
  • the advantages which can be achieved with the invention are primarily to be seen in the following:
  • the dimensioning, arrangement and kinematics of the coupling member and of the driver body are coordinated or tuned to one another such that when the press die is at a critical gap width of e.g. 5.9 mm (or at greater gap width) is prevented from moving, the coupling member to the driver can not necessarily engage and so drives the drive ram "into the void".
  • a critical gap width e.g. 5.9 mm (or at greater gap width) is prevented from moving
  • the coupling member to the driver can not necessarily engage and so drives the drive ram "into the void".
  • light barriers, proximity or limit switches can be saved during press operation, these devices can naturally find use in the adjustment before operation. Due to the simple construction, the safety device according to the invention is very reliable.
  • a further advantageous embodiment consists in that the driver body is arranged at the free end of the drive ram and has a recess open to the side of the coupling, whose upper shoulder forms the driver extension.
  • a further development of the invention according to claim 10 for pressing with protective hood and with particular greater press stroke and pressing pressure is that the obstruction of the press ram and thus the idle stroke of the drive ram are made dependent on the actual position of the guard and that as a triggering criterion for the initiation of safety relevant Leerhubes the drive ram the open position or - in case of failure - not complete closing a mounted in the pressing direction and vice versa reciprocally mounted protective hood is used, which with open or not completely closed guard via a locking mechanism, the deflection movement of the coupling member in the engagement region of Mitêtnitees blocked, after complete closing of the guard, however, releases.
  • the pawl is applied during the idle stroke on the locking rail and is thereby prevented from pivoting, so that thus the coupling member remains out of engagement of the Mit lovedfortsatzes. Only then, when the barrier rail releases the pawl after reaching and falling below the safety distance through the guard, the power flow is effected by the drive ram on the engaging on the driver extension coupling member to the press ram.
  • Fig. 1 shows a press P1, such as a crimping press, with associated safety device S1 schematically in elevation, omitting the parts not required for understanding the invention.
  • a safety device S1 generally suitable for forming machines, which include pneumatic, hydraulic or electrical pressing or punching, further hand-operated pressing or punching.
  • the press P1 is equipped with a press frame 14 and an attached, preferably pneumatically operated power amplifier 2 with working cylinder 2.1 and drive ram 1, which consists of a piston rod 1.1 with piston 1.2 and a driver body 7, which latter at the free end of the piston rod 1.1 sits (see left part of the figure).
  • a longitudinally displaceable in a guide 3 of the press frame 14 mounted press ram 4 is shown, which is connected to a schematically indicated pressing tool 5 at its lower end to a lower punch 6 and moved away from this.
  • a1 20mm.
  • the drive tappet 1 has a driver extension 7.1 on a driver body 7 and the press ram 4 is provided with a coupling member 8 which can be deflected more or less in the direction of the driver extension 7.1.
  • the range of action r0 of the coupling member 8 is not sufficient, and the drive ram 1 strokes past this drive without power, as it Fig. 3 and 4 clarify.
  • the coupling member 8 is a toggle mechanism consisting of an angled first lever 8a and a second, by means of a toggle joint axis 100 with the first articulated lever 8b, wherein the first lever 8a is an L-shaped clutch lever, in its angular range 8.1 is hinged to the upper end of the press ram 4.
  • the clutch lever 8a protrudes with a coupling edge 8.2 at the free end of a first leg 8a1 so in the vicinity of the Mit supportivefortsatzes 7, that the first leg 8a1 depending on its swing angle and thus dependent on the stroke of the press ram 4th either engages the driver extension 7 ( Fig. 5 . 6 unf 8) or past it ( Fig. 3 . Fig.
  • the second limb 8a2 of the clutch lever 8a is articulated via the second lever 8b in the form of a hinge lug to the hinge pin 9 of a bearing 10 on the side of the toggle mechanism 8a, 8b remote from the press ram 4, wherein the two pivot axes 9 ', 11' of FIG Bolt 9, 11 for the bearing 10 and for the articulation between the press ram 4 and clutch lever 8a achsparalllel with variable distance z overlying each other and this variable distance z corresponding to the following two extreme positions result: thelichknickte starting position I of the two levers 8a, 8b with the smallest Distance z1 ( Fig. 1 and Figure 7 ) and the extended working position II of the two levers with the greatest distance z5 ( Fig. 6 . Fig. 8 ), in which the power transmission from the drive tappet 1 to the press ram 4 is greatest due to leverage.
  • the driver body 7 is arranged at the free end of the drive ram 1 and has a coupling member 8 laterally open recess 7.2, the upper paragraph forms the driver extension 7.1.
  • the laterally open recess 7.2 is limited at its lower end by a protruding toward the coupling member 8 tongue 7.3, which forms a support for the free end of the first leg 8a1 of the Kupplingshebels 8a in its initial position I and at the onset of stroke m1 (see Fig. 1 and 2 ).
  • the driver body 7 and thus the Antriebsstössel 1 are guided on a housing-fixed vertical rail 12 in the stroke direction m.
  • Fig. 1 is only indicated by dash-dotted lines, that on the second lever 8b of the coupling member 8 directed to the first leg of the clutch lever 8a adjustment screw 120 is mounted, which forms a stop for adjusting the folded-in starting position I of the clutch lever 8a.
  • the adjusting screw is in Fig. 8 clearly visible.
  • Fig. 7 and 8th also show that the bearing 10 has a bearing on the frame 14 U-shaped bearing body 10 ', on which the second lever 8b on one of these and the two U-legs 10a of the bearing body 10' penetrating hinge pin 9 is mounted.
  • the bearing body may be attached to the frame 14. If you want to measure the press pressure, then the illustrated embodiment is advantageous. After that is (comp. Fig.1 and Fig.
  • Fig. 7 and 8th also show that axially parallel to the press ram 4 and its guide channel 3, two opposing rods 4 'in associated guide holes 4 "of the press frame 14 are mounted longitudinally displaceable, the rods 4' are fixed with their upper ends to a cross member 15 of the press ram 4 and between traverse 15 and frame 14 supporting compression springs 16 for partial reduction of the press ram weight are mounted on the rods 4 ', in particular as spiral springs surround the rods 4'.
  • the press ram 4 hits in this way on an obstacle 130 in the press nip a3 ( Fig. 3 and 4 ), where the obstacle can be a finger, not with its full weight, but rather gently.
  • the press nip which is generally denoted by a, is formed in practice between the tool 5 ders upper punch 40 and a die 60 (if any) of the lower punch 6, see this the detailed representation in Fig. 7 and 8th , In the Fig. 1 to 6 the tool 5 is only hinted at, and the lower punch 6 has for simplification no Matrize.Die realistic representation Fig. 7 and 8th shows about the illustration in Fig. 1 to 6
  • the lower part 14a of the press frame 14 is screwed together from two halves. On the lower part 14a of the press upper part 14b is placed and screwed with this.
  • the pneumatic switch 17 is actuated, so that the upper side of the piston 1.2 is pressurized and the underside of which is pressure-relieved.
  • the drive tappet then moves downwards in the stroke direction m1 (m means the general stroke direction downwards or upwards). This is in Fig. 2 shown.
  • the coupling edge 8.2 of the coupling member 8 thus remains in front of the driver 7 and does not come into the engagement region of the Mit supportivefortsatzes 7.1. Consequently, the drive tappet 1, without taking the coupling member 8, continue in an idle stroke, which in Fig. 4 is shown. If the drive ram 1 arrived in its lower end position, the switch 17 is in the position after Fig. 1 brought; the drive tappet moves in the direction of m2 to its starting position (cf. Fig. 1 ) back.
  • the coupling member 8 is pivoted so far that its coupling edge 8.2 is overlapped by the driver extension 7.1.
  • the second embodiment of a safety device S2 according to Fig. 9 to 17 is intended for presses with protective hood and in particular larger press stroke and pressing pressure.
  • the interference of the press punch 4 and so that the idle stroke of the (not visible here) drive plunger are made dependent on the actual position of the protective cover 160, that is, as a trigger criterion for initiating the safety-relevant idle stroke of the driving ram is the open position, or the - in the case of failure - not complete closure of one in the pressing direction (+ n) and opposite reciprocally mounted mounted guard 160 used, which with open or not fully closed hood position via a locking mechanism 150, the deflection movement of the coupling member 8 in the engagement region of Mitêtfortsatzes 7.1 blocked, on the other hand releases after complete closure of the protective cover 160.
  • the driver extension is in the 11 to 17 to see and in the Fig. 1 to 8 of the first embodiment, which in construction and function of the coupling member 8 and the driver 7 of the second
  • an elongated slide 180 is mounted up and down movable axially parallel to the press ram 4 guided.
  • the slider 180 is fixed at its lower end to the protective cover 160, so that it is movable with the slider 180.
  • the locking mechanism 150 has a pawl 170 firmly seated on the toggle joint axis 100 and rotatably mounted therewith. This also sits firmly on the hinge pin 9 and pivots when released from the locking rail 190, from the locked position to Fig. 9 clockwise about the axis 9 'in the unlocked position ( Fig. 10 ).
  • the second lever 8b which has with her the two axes 9 'and 100' in common, from theRocknickten position (see eg the in Fig.
  • a likewise elongated, preferably pneumatic actuator 200 is held in detail on an elongated, fixed to the press frame 14 frame 210, the piston rod 220 is connected to the protective cover 160 and the slider 180 to their adjustment.
  • a linear guide 230 for the slider 180 and for the movable with him locking rail 190 is attached (see in particular Fig. 9 ).
  • the pressing tool 5 is omitted.
  • Fig. 14 This applies to Fig. 13 Said, with the difference that pressing cylinder 2 and drive tappet 1 have reached their lower end position from which a new cycle can begin again.
  • Fig. 15 Starting position of the pressing process with the protective cover 160 completely closed .
  • the pressing cylinder and the drive ram are still retracted, the coupling member is in the "up position" (disengaged), the locking mechanism 150 can no longer be active because the locking pawl 170 is released from the blocking rail ist.
  • - Fig. 16 The pressing cylinder 2 and the drive ram and the coupling member are in closed guard 160 in working movement, starting clutch between (7) and (8), the pawl 170 has rotated slightly clockwise, so that the power stroke begins and the pressing force on the press ram 4 begins to take effect.
  • - Fig. 17 With a closed protective hood 160 press cylinder 2 and the drive ram and the press ram 4, the pressing force are now in or very shortly before the end position, coupling member 8 fully engaged with driver 7, the power stroke is in the end region, at a maximum.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
EP08015429A 2007-09-03 2008-09-01 Dispositif de sécurité sur des machines de formage Withdrawn EP2030772A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007041704A DE102007041704A1 (de) 2007-09-03 2007-09-03 Sicherheitseinrichtung an Umformmaschinen

Publications (2)

Publication Number Publication Date
EP2030772A2 true EP2030772A2 (fr) 2009-03-04
EP2030772A3 EP2030772A3 (fr) 2012-04-25

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EP08015429A Withdrawn EP2030772A3 (fr) 2007-09-03 2008-09-01 Dispositif de sécurité sur des machines de formage

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EP (1) EP2030772A3 (fr)
DE (1) DE102007041704A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108889885A (zh) * 2018-07-27 2018-11-27 巨力自动化设备（浙江）有限公司 铜线成型装置
CN109962280A (zh) * 2017-12-26 2019-07-02 宁德时代新能源科技股份有限公司 电芯整形装置
CN112743010A (zh) * 2019-10-31 2021-05-04 麦克赛尔泉株式会社 加工工具
CN114179429A (zh) * 2021-12-07 2022-03-15 金丰（中国）机械工业有限公司 一种压力机的滑块防坠锁定装置
CN115157717A (zh) * 2022-06-29 2022-10-11 中化工程沧州冷却技术有限公司 一种冷却塔用玻璃钢管道的生产工艺

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108845434B (zh) * 2018-09-20 2024-07-02 浙江通耀科技有限公司 一种能使大脑视觉成像快速识别的训练眼镜

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998016371A1 (fr) 1996-10-12 1998-04-23 Telegärtner Gerätebau GmbH Dispositif de securite situe sur des machines-outils travaillant le metal par formage

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1045358A (en) * 1964-08-10 1966-10-12 Corocraft Manufacturers Ltd Improvements in and relating to presses
GB1503228A (en) * 1976-09-17 1978-03-08 Amp Inc Tool for applying a compressive force to a workpiece
JPS61206600A (ja) * 1985-03-11 1986-09-12 Ebina Kikai Kk 卓上プレス機
JPH0335519Y2 (fr) * 1985-07-17 1991-07-26
JP2000158194A (ja) * 1998-11-25 2000-06-13 Mti:Kk 溝カム機構及び溝カム機構を利用した安全装置を具備するプレス装置
DE202005021037U1 (de) * 2005-10-24 2007-03-08 Rennsteig Werkzeuge Gmbh Crimpmaschine mit einer Schutzabdeckung

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998016371A1 (fr) 1996-10-12 1998-04-23 Telegärtner Gerätebau GmbH Dispositif de securite situe sur des machines-outils travaillant le metal par formage
EP0930963B1 (fr) 1996-10-12 2000-05-31 Telegärtner Gerätebau GmbH Dispositif de securite situe sur des machines-outils travaillant le metal par formage

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109962280A (zh) * 2017-12-26 2019-07-02 宁德时代新能源科技股份有限公司 电芯整形装置
CN108889885A (zh) * 2018-07-27 2018-11-27 巨力自动化设备（浙江）有限公司 铜线成型装置
CN108889885B (zh) * 2018-07-27 2023-11-17 巨力自动化设备（浙江）有限公司 铜线成型装置
CN112743010A (zh) * 2019-10-31 2021-05-04 麦克赛尔泉株式会社 加工工具
CN114179429A (zh) * 2021-12-07 2022-03-15 金丰（中国）机械工业有限公司 一种压力机的滑块防坠锁定装置
CN115157717A (zh) * 2022-06-29 2022-10-11 中化工程沧州冷却技术有限公司 一种冷却塔用玻璃钢管道的生产工艺
CN115157717B (zh) * 2022-06-29 2024-02-09 中化工程沧州冷却技术有限公司 一种冷却塔用玻璃钢管道的生产工艺

Also Published As

Publication number Publication date
DE102007041704A1 (de) 2009-03-05
EP2030772A3 (fr) 2012-04-25

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