CN1044776A

CN1044776A - The bending method of metal sheet and the bending apparatus of implementing this method

Info

Publication number: CN1044776A
Application number: CN 89100967
Authority: CN
Inventors: 瓦克拉夫·兹博尼克; 爱德华·汉尼
Original assignee: M&S Brugg AG
Current assignee: M&S Brugg AG
Priority date: 1989-02-11
Filing date: 1989-02-11
Publication date: 1990-08-22
Anticipated expiration: 2004-02-11
Also published as: CN1025420C

Abstract

The method that is used for curved plate member should improve the precision of bending operation widely, wherein particularly avoids and compensate a kind of initial deformation that participates in the element of suppression process.At first, crooked plate to carry out bending according to one than demarcating big angle, angle, according to the unloading of carrying out plate and resilience, compare at the angle that obtains angle and demarcation of the plate by resilience then, regulates at the bottom of the former so that correspondingly angle correction is poor again.Subsequently, to the operation of the end of new adjusting, and plate is in definite angle position by means of the drift of full load.

Description

The bending method of metal sheet and the bending apparatus of implementing this method

The present invention relates to a kind of method that is used for curved plate member, and a kind of bending apparatus that is used for implementing this method.This bending apparatus has a crooked formed punch and a former, and crooked formed punch enters former more or less to realize bending operation.Try hard to improve the precision of this machine in manufacturing procedure with the present invention.Should avoid initial deformation especially with the device element of participation remuneration pressing process.That is to say that this distortion causes a kind of coarse processing of workpiece.

According to what the present invention advised be, according to a demarcation angle that provides, carry out the method for crooked plate by means of a bending apparatus, this device has crooked formed punch and a bending die, it is characterized in that, provides in the operation of demarcating the angle at first, perhaps one approximately greater than the angle of demarcating the angle, be to determine by the adjusting at the bottom of this former, subsequently, this plate bends to corresponding angle by the decline of drift until the end of former.In second operation, crooked plate is unloaded, so that realize a kind of in the resilience of removing under the pressure state.

In the 3rd operation, by comparing with demarcating the angle of resilience, and suitable correction is done according to the differential seat angle that obtains in the position at the bottom of the former, then with the angle that plate constituted of removing pressure, in a last operation, the drift with full load moved the end of to again.

For implementing this method, the formation of suitable bending apparatus is crimp press and the fixing bed die with the mold that moves both vertically, and simultaneously, is flexibly mounted in the mold of crooked formed punch and its bearing.

According to as suggested in the present invention be, have the beam in a plurality of segmentations of length direction in the drift bearing, at this, this drift has a cavity that separates by the pressure-loaded flexible wall.Its beam section drops on the guide finger towards flexible wall in vertical direction slidably, guide finger is supported on the following part of drift bearing of stationary curved drift, this crooked formed punch is resistant being mounted slidably in the drift bearing, and link with a device that is used for changing crooked formed punch lifting direction.

With this method the pressure that acts on crooked formed punch is being kept changeably along crooked formed punch, particularly Ju Bu rising or reduction is so that reach point-device advancing that is fit to material.In this way, a plate angle that provides at last can keep very accurate.

Showed an embodiment who is used to the bending apparatus that is fit to of the method implementing to be advised in the accompanying drawings, and showed:

Fig. 1, the vertical section of the mold by bending apparatus,

Fig. 2 is by a vertical vertical section of identical upper part.

The bending apparatus that is fit to that is used for implementing this method constitutes the form of crimp press, and has a mold 1, this mold constitute in known manner going up of hydraulic control and can under move, so that hold a drift bearing that is used for realizing various bending operations, this drift bearing extends along mold, and constitute by two parts, promptly constitute by a upper-part 2 with by a lower member 3, upper-part 2 is to be fixed on the mold with screw 4, and screw distributes on the total length of two parts equably simultaneously.Lower member 3 connects with the upper-part 2 of drift bearing by bolt 5, they are in a row being provided with in both sides, the reverse each other plane of the lower member 3 of drift bearing and upper-part 2 is provided with corresponding groove 6 and 7, these grooves separate with a flexible diaphragm type midfeather, this film is between parts 2 and parts 3, and be clamped on the edge, two cavitys have been formed by this way, simultaneously the rectangular backbar 9 in cross section is accommodated in the corresponding cavity below the groove 7, on the total length of lower member 3, extend, and split into single-piece 9a(Fig. 2 in the vertical).Backbar 9 upper surfaces be arranged on flexible wall 8 below, and be placed on the end 7a of groove 7.Simultaneously, in this end 7a, be provided with the upright opening that is used for holding guide finger 10.This hole extends in the groove of thin-and-long of lower member 3, in lower member, has held crooked formed punch 11.Be appropriate wherein by following setting, promptly the mold applied pressure at first is delivered on the liquid, this liquid is arranged in groove 6, like this, this flexible wall continues pressure to be sent on the backbar 9 thus, and these backbars bear the load of crooked formed punch 11.

For the stationary curved drift at first is provided with side opening, alignment pin 12 has been installed in this side opening.A flexible pipe that runs through 14 has been supported in end 13 by alignment pin 12 outstanding in this hole, and this flexible pipe is attached on the wall 15 in addition, and this wall is fixed on the lower member 3 of drift bearing with screw 16, and makes it to be parallel to pin end 13.If flexible pipe 14 is squeezed into some gas, alignment pin moves along axis is parallel so, and makes crooked formed punch 11 fix to clamp by means of alignment pin 12.

In addition, crooked formed punch 11 is provided with the limit groove of a ditch shape, and this groove has interface and interface 18 that level is moved towards perpendicular to the sidewall of bending mould 1 of an inclination.Embedded the bearing 19 of a cam-shaped in this groove, it has one and interface 17 and 18 corresponding flanges 20, and is under the effect of a compression spring 21.This spring 21 is arranged in the hole 22 of cam-shaped bearing 19, and supports a wall 23 with its free end.In addition, this bearing 19 is provided with an arm 24 of side vertically upward, the adjustment (adjusting) lever 25 of this arm and an axle 26 exists getting in touch on the function, a kind of like this setting is suitable, promptly when bearing 19 moves in the horizontal direction, under the effect of spring by the clockwise deflection that has produced an axle 26 by interface 17 and 18 determined grooves.This 26 links with the manipulation of the mold 1 of press, in this way, walks around by executing of axle and to have changed the direction of lifting.

On-stream, the push rod of crimp press moves towards the plate of distortion together with mold 1 and crooked formed punch 11.This plate is placed on the unillustrated female member, and the former bottom land of implementing bending operation simultaneously is positioned at a position, should the end on this position and the support edge of former determined an angle jointly, it is bigger than the demarcation angle of obtaining.By the decline of crooked formed punch, this plate makes plate have one than demarcating the angle of some greatly, angle facing to the bottom land extruding like this.In the case, this plate has definite stress that gives, and this gives stress and is determined by material.This gives, and stress is loose therefrom, and at this moment, plate is unloaded, and Xie Zai best method is to realize by the fluid pressure that reduces in the groove 6 simultaneously.In this way, make and on crooked formed punch 11, reducing pressure on the backbar 9 and at last.Subsequently, give curved workpiece by means of the drift of carrying is towards the former bottom application pressure of details fully once more, workpiece correspondingly is out of shape according to the demarcation angle of determining thereon.

Because backbar 9 is made up of a plurality of single parts 9a, and each single parts all concurs with the guide finger of configuration, just can not have the overcompensation that the inaccuracy of workpiece end is processed.This not direct backbar 9a in the processing work zone does not have resistance or less than the resistance of the parts that are located immediately at the plate top when crooked formed punch moves both vertically.

Enforcement according to working procedure that is to say, whenever crooked formed punch 11 impacts at the bottom of the former, and just raising suddenly of Fang counter-pressure vertically upward.This has just produced the moving vertically upward of a crooked formed punch 11.Cam-shaped bearing 19 is flatly slided back and is existing by tilted interface 17 and 18 determined groove embedding consolidations to the side slip no longer like this.Under the situation of horizontal movement, arm 24 has been realized lever 25 clockwise deflections, and thus, the lifting direction of press changes by means of axle 26, therefore be pressed into and when the base plate of former is put when drift, this commutation also realized inserting drift and facing to laid at the bottom of the former automatically.

Whole operations can automatically and be given first editor ground and be implemented, and where face all suits wherein aforesaid device for this purpose is in office.

Claims

1, according to a demarcation angle that provides, carry out the method for curved plate member by means of a bending apparatus, this device has the crooked former at the bottom of a flexibly mounted crooked formed punch and have former, is corresponding adjustable for the angle that constitutes at the bottom of this former,

It is characterized in that,

In first operation, the height and position at the end has been determined a corresponding angle, and this angle is greater than the demarcation angle that provides, and workpiece is done corresponding crooked by the decline of drift until the end of former with bigger angle according to this.

In second operation, crooked workpiece is unloaded, has produced a resilience like this under the state of unloading.

In the 3rd operation, by unloading of resilience year the angle that workpiece constituted compare with the demarcation angle that provides, and corresponding the correction done by the differential seat angle known in the position at the bottom of the former.Then, in the 4th operation, crooked workpiece is with pressing to bottom application with the drift of full load again, and this end has revised definite height and position.

2, be used for implementing the bending apparatus of this method, this device has a crooked press, and it has a mold that moves both vertically (1), with a fixing bed die, simultaneously in mould (1), crooked formed punch (11) and its bearing (2,3) flexibly supporting

It is characterized in that,

Drift bearing (2,3) has the cavity (6 that the flexible wall (8) by a pressure-loaded separates, 7), at drift bearing (2,3) in, the beam (9 that has a plurality of segmentations in the vertical, 9a), this beam section (9a) is dropping on the guide finger (10) movably towards flexible wall on the vertical direction, these guide fingers are bearing on the lower member of drift bearing (3) of stationary curved drift (11), this crooked formed punch is resistant to be arranged in the drift bearing (2,3) movably, and links with a device that is used for changing crooked formed punch lifting direction.

3, according to the bending apparatus of claim 2, it is characterized in that, a upper-part (2) of drift bearing and the reverse plane each other of a lower member (3) are provided with corresponding groove (6 and 7), these grooves separate by a film (8), and the edge of this film between upper-part and lower member (2 and 3) clamps.

4, according to the bending apparatus of claim 3, it is characterized in that, this guide finger is arranged in the upright opening of drift bearing lower member (3), and these holes extend in the long and narrow groove of drift bearing lower member (3) with their lower end, in this groove crooked formed punch have been installed.

5, according to the bending apparatus of claim 4, it is characterized in that, the supporting pin of installing in the wall of thin-and-long groove (12) is used for fixing crooked formed punch (11), and these supporting pins are supporting a flexible pipe that runs through (14), and this flexible pipe is exerted pressure towards crooked formed punch by the supporting pin under pressure.

6, according to the bending apparatus of claim 5, it is characterized in that, in a sidewall of crooked formed punch (11), the bearing of a cam-shaped (19) is chimeric with the interface (17) of an inclination, this bearing and adjustment (adjusting) lever (a 25) co-operation that is used for the converter of operation change lifting direction.

7, according to the bending apparatus of claim 6, it is characterized in that, this cam-shaped bearing (19) is under the effect of a compression spring (21), and arm (24) with protrusion of a side, this arm when bearing (19) when axis moves, make adjustment (adjusting) lever (25) deflection that has axle (26).