EP0878250A2 - Endroit de pliage d'un tube metallique à parois mince et appareil pour plier un tel endroit - Google Patents

Endroit de pliage d'un tube metallique à parois mince et appareil pour plier un tel endroit Download PDF

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Publication number
EP0878250A2
EP0878250A2 EP98108604A EP98108604A EP0878250A2 EP 0878250 A2 EP0878250 A2 EP 0878250A2 EP 98108604 A EP98108604 A EP 98108604A EP 98108604 A EP98108604 A EP 98108604A EP 0878250 A2 EP0878250 A2 EP 0878250A2
Authority
EP
European Patent Office
Prior art keywords
bending
roller
groove
metal tube
tube
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.)
Withdrawn
Application number
EP98108604A
Other languages
German (de)
English (en)
Other versions
EP0878250A3 (fr
Inventor
Wolfgang Barth
Reinhard Schmuttermair
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.)
Megatronic Schweissmaschinenbau GmbH
Original Assignee
Megatronic Schweissmaschinenbau GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Megatronic Schweissmaschinenbau GmbH filed Critical Megatronic Schweissmaschinenbau GmbH
Publication of EP0878250A2 publication Critical patent/EP0878250A2/fr
Publication of EP0878250A3 publication Critical patent/EP0878250A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/02—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment
    • B21D7/022—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment over a stationary forming member only
    • 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
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/02—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment

Definitions

  • the invention relates to a bending point thornlessly bent thin-walled metal tube and on a Device for producing this bending point with the Characteristics in the subordinate claims.
  • the bending of metal pipes is especially then problematic if the metal pipe has a small wall thickness and has a relatively large diameter and the bending takes place without a mandrel that can be inserted into the tube should. This measure is particularly problematic if a small bending radius is to be created and that Metal tube made of stainless steel.
  • the object of the invention is the aforementioned Avoid disadvantages and a better tube shape in the to conceive curved state as well as a Production of this tube shape suitable device to propose.
  • the invention solves this problem with the features in the independent claims.
  • the solution according to the invention has the advantage that the inner cross section of the tube is largely retained without much greater design effort, there is no narrowing of the tube cross section and nevertheless an acceptable external design of the tube is achieved.
  • Such a bending device is in itself due to the DE-A-2 247 040 discloses where between the form roller and a guide part attached to the bending lever several juxtaposed slats of existing Jointed association is arranged. Each slat grips around Half of the pipe to be bent and has two at the back Rollers against which the guide part acts. On this way the pipe will avoid friction bent one slat at a time with the pipe engaged and thereby a circular movement around the Form roll is executed.
  • the slats are through Steel cables connected together and can be the Adjust the curvature of the pipe.
  • This known bending device is because of the shape of the Slats and their connection by steel cables as well the roles attached to it are extraordinary costly and therefore unprofitable.
  • a chain-shaped bending member is formed with the simplest of means, one of which is held stationary and the other with the aid of a bending roller which is smooth on the outer circumference during its pivoting movement around the forming roller from the stretched state into a curved position, as a result of which The tube bends.
  • the features of the invention are listed in the device claim 3, wherein the notches extending axially parallel in the flanks of the form roller groove are the cause of the formation of the bent tube according to the protection claim 1.
  • the invention provides that the bending roll indirectly via a Spring steel band or directly on the limb-shaped Let the bending element act. Grips around the bending organ the outer half of the metal pipe to be bent. So while the bending roll that is around the axis of the Form roller is pivotable, directly or indirectly on that Acts on the bending organ, this bends according to the chain-like connection of their links. The bending organ thus reaches the bending radius of the metal pipe corresponding bow position, after which the individual links of the Bending element gradually on the circumference of the metal tube act and force this into the groove of the form roller. The limbs of the flexure enclose the outer half of the metal tube entirely and thus prevent the outer circumference of the Metal tube and a bulge-like evasion of the Material of the metal tube to the side.
  • Figures 1 to 3 show a bending point (2) of a thornless curved thin-walled metal tube.
  • metal pipes with less are problematic Wall thickness and relatively large diameter.
  • the material of the metal pipe also plays a role, stainless steel in particular is difficult to bend. How one can bend such metal pipes without negative ones Changes in cross-section of the metal pipe (1) arise can result from the representation of the bending point according to Figures 1 to 3 and the device for manufacturing of such a bending point according to FIGS. 4 to 8.
  • the inner wall half (22) gives way, which contains the bead-like ribs (4), from the normal Extent of the metal pipe (1) to be bent.
  • the normal one Scope is shown in dash-dot lines. This creates a slight increase in the internal cross section of the Metal tube (1), but without in the outside Pipe wall areas flattening, indentations or other bruises form.
  • One through that Metal pipe (1) flowing medium does not experience any Flow-unfavorable influence, especially no throttling.
  • a process producing this bent metal pipe would thus express themselves in the fact that when deforming the Material of the metal pipe from the outer peripheral region Dodge in the direction of the inner circumferential area leaves to get it in beaded ribs and the To catch the midrib without the inside cross section of the Narrow the metal pipe.
  • FIG. 4 A suitable device is shown schematically in FIG. 4 shown in side view.
  • Bending roller (7) not directly on the metal tube (1) one, but is located at a distance (8) from the form roller (6).
  • This distance (8) is one of several Members (10, 12) existing bending element (9) filled, the opposite of the feed direction (25) directed member (12) is held stationary.
  • the others Links (10) are on the fixed stationary link (12) so articulated that they are parallel to the circumference the form roller (6) can adjust.
  • the bending roll (7) can on the outside (14) of the individual links (10,12) act directly and press them against the form roller (6) and thus causes the bending member (9) to bend of the metal tube (1) causes.
  • the links (10, 12) of the bending element (9) accordingly have internal continuous fillets (11), which the The outer circumference of the metal tube are adapted.
  • bow position of the bending member (9) delimit the end faces (13) of the links (10, 12) close together and thus form a closed Ring segment of the bending element (9).
  • the end faces (13) of the links (10, 12) convex or protruding wedge-shaped educated.
  • the outer sides (14) of the links are flat or arched. That is why the outside needs
  • the outer surface (15) of the bending roller (7) is not profiled be, but acts as a cylindrical role on the Outside (14) of the links (10, 12).
  • the form roller (6) according to FIG. 5 particularly profiled.
  • the flanks (17) of the circumferential groove (23) are initially the extent of the undeformed Adjusted metal tube (1). However, the closer these flanks (17) approach the bottom of the groove (23), the more give way to the flanks (19) adjacent to the groove base (23) from the circumferential shape of the metal tube (1).
  • Notches (16) are present, which in a groove (18) open into the bottom along the groove (23) Extends circumferential direction.
  • These notches (16) and Grooves (18) are thus recessed in the flanks (17, 19) arranged and serve deformed material of the to record the inner circumferential area of the metal tube (1). This results in the bent metal tube (1)
  • Figure 3 shown raised bead-like ribs (4) and the raised central rib (5).
  • Figures 6 to 8 are in an enlarged view the links (10, 12) of the bending element (9) in different Views and sections shown. From the inside 6 shows the wedge-shaped design of the Outside (14) of the limbs (10, 12) in the extended Position of the bending element (9). At both ends are the links (10, 12) via connecting links (20, 21) articulated to each other so that the bending member (9) from the extended position according to FIG Bow position can be brought according to Figure 7, wherein the links (10, 12) in this bent position according to Figure 7, the metal tube (1) on the outer circumference completely enclose.
  • the individual links (10, 12) are on the inside with a continuous fillet (11) provided which the outer circumference of the to be bent Metal tube (1) is adapted.
  • the outside (14) of the Links (10,12) is flat.
  • the Links (20,21) are step-like to each other offset to transfer the stretched bending member (9) to force in the bow position according to Figure 7.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
EP98108604A 1997-05-13 1998-05-12 Endroit de pliage d'un tube metallique à parois mince et appareil pour plier un tel endroit Withdrawn EP0878250A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29708498U 1997-05-13
DE29708498U DE29708498U1 (de) 1997-05-13 1997-05-13 Biegestelle eines dornlos gebogenen dünnwandigen Metallrohres und Vorrichtung zur Herstellung einer solchen Biegestelle

Publications (2)

Publication Number Publication Date
EP0878250A2 true EP0878250A2 (fr) 1998-11-18
EP0878250A3 EP0878250A3 (fr) 1999-09-29

Family

ID=8040275

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98108604A Withdrawn EP0878250A3 (fr) 1997-05-13 1998-05-12 Endroit de pliage d'un tube metallique à parois mince et appareil pour plier un tel endroit

Country Status (2)

Country Link
EP (1) EP0878250A3 (fr)
DE (1) DE29708498U1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113617899A (zh) * 2021-08-02 2021-11-09 浙江金马逊机械有限公司 弯管设备及其抑制弯管变椭的弯管加工方法
CN113617900A (zh) * 2021-08-02 2021-11-09 浙江金马逊机械有限公司 数控弯管设备及其抑制弯管变椭活节压块装置
EP4434650A1 (fr) * 2023-03-20 2024-09-25 Geberit International AG Dispositif de cintrage

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008045872A1 (de) 2008-09-04 2010-03-11 Universität Siegen Verfahren und Biegewerkzeug zum Biegen von Rohren über einen Biegedorn sowie Sickenwerkzeug

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL49105C (fr) * 1900-01-01
US3472056A (en) * 1966-11-25 1969-10-14 Walker Mfg Co Pipe bending apparatus and method of bending
DE1947917A1 (de) * 1968-09-23 1970-04-02 Putkitaivutin Oy Rohrbiegevorrichtung,insbesondere zur Biegung von Rohren mit duennen Wandungen

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113617899A (zh) * 2021-08-02 2021-11-09 浙江金马逊机械有限公司 弯管设备及其抑制弯管变椭的弯管加工方法
CN113617900A (zh) * 2021-08-02 2021-11-09 浙江金马逊机械有限公司 数控弯管设备及其抑制弯管变椭活节压块装置
CN113617900B (zh) * 2021-08-02 2023-03-07 浙江金马逊智能制造股份有限公司 数控弯管设备及其抑制弯管变椭活节压块装置
CN113617899B (zh) * 2021-08-02 2023-03-10 浙江金马逊智能制造股份有限公司 弯管设备及其抑制弯管变椭的弯管加工方法
EP4434650A1 (fr) * 2023-03-20 2024-09-25 Geberit International AG Dispositif de cintrage

Also Published As

Publication number Publication date
DE29708498U1 (de) 1998-05-07
EP0878250A3 (fr) 1999-09-29

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