CN108787896A - A kind of working method of the Bending Mould with springback compensation function - Google Patents

Abstract

The invention relates to the field of moulds, in particular to a working method of a bending die with a springback compensation function. The bending die includes a hydraulic device and a lower die base, the hydraulic device is installed on the side of the lower die base, and the hydraulic device An upper mold is provided on the upper mold, and a mold groove is arranged on the upper mold. The upper mold is located directly above the lower mold base and both ends of the upper mold are equipped with a deviation correction mechanism. The lower mold base is provided with a rebound mechanism. , the upper end of the rebound mechanism is provided with a lower mold, the two ends of the lower mold are equipped with bending molds, the upper end faces of the two bending molds are arc-shaped, and the two bending molds There are compensation mechanisms on the sides. The beneficial effect of the invention is that it can prevent over-compensation at the bending part of the workpiece, and at the same time, can adjust and compensate the bending angle according to the material of the workpiece, so that its application range is wider.

Description

A working method of bending die with springback compensation function

technical field

The invention relates to the field of molds, in particular to a working method of a bending mold with a springback compensation function.

Background technique

In the process of workpiece processing, it is often necessary to bend the workpiece to form other shapes, but the workpiece will have a certain rebound effect due to its own elastic force after bending, resulting in many workpieces being bent after rebound The angle is not up to standard, resulting in unqualified workpiece.

Chinese Patent No. CN105396914B discloses a bending springback compensation mold, the upper mold includes an upper mold base and a punch, the punch has a bottom angle that matches the bending angle of the workpiece, and has a bending compensation angle; The mold includes a rotatable die, which is installed on the lower die holder and has a bending groove matching the bottom angle of the punch, and the lower die holder is provided with a first reset mechanism for resetting the rotatable die holder. mechanism. A pendulum block is installed on the rotatable die. During the mold closing process, the upper mold moves from top to bottom, the punch compresses the stripper plate, and the stripper plate drives the rotatable die to rotate. At the initial stage of closing, the pendulum swings with the rotation of the die. The push block on the mold comes into contact with the pendulum block. When the mold is closed to the position, the push block is located inside the pendulum block, and its lower end abuts against the inner side of the pendulum block. The die squeezes the swinging die and the swinging block through the punch to make the swinging die and the swinging block squeeze the two ends of the workpiece, so that the two ends of the workpiece are bent into a certain angle, but in the actual processing process, due to the material of the workpiece Different, resulting in different compensation angles at the bends that need to be aligned, and the above-mentioned molds cannot change the compensation angles, and can only adapt to the bending of workpieces of different materials by replacing the swinging die and pendulum blocks, resulting in a small range of applications.

Secondly, even workpieces made of the same material will have certain differences in compensation angle during use, so the same bending angle will cause overcompensation at the bend of some workpieces, and overcompensated workpieces will also be stuck in the convex On the mold, it affects the continuous work of the mold, and there is no method for processing the overcompensated workpiece in the above-mentioned patent.

Contents of the invention

The object of the present invention is to provide a bending die with a springback compensation function to solve the problems raised in the above-mentioned background technology.

The technical solution of the present invention is: comprising a hydraulic device and a lower mold base, the hydraulic device is installed on the side of the lower mold base, the hydraulic device is provided with an upper mold, the upper mold is provided with a die groove, and the upper mold The mold is located directly above the lower mold base and both ends of the upper mold are provided with a deviation correction mechanism, the lower mold base is provided with a rebound mechanism, the upper end of the rebound mechanism is provided with a lower mold, and the two ends of the lower mold Bending dies are provided at both ends, the upper end faces of the two bending dies are arc-shaped, and compensation mechanisms are provided on the sides of the two bending dies.

In a preferred embodiment of the present invention, each of the deviation correction mechanisms includes a deviation correction block, a deviation correction rod, a first spring and a telescopic rod, the deviation correction block is rotatably connected in the mold cavity, and one end of the deviation correction rod is connected to the The block is integrally formed, the upper mold is provided with a telescopic hole, the first spring is installed in the telescopic hole, one end of the telescopic rod is inserted in the telescopic hole and fixedly connected with one end of the first spring, the telescopic The other end of the rod is provided with a deviation-correcting wheel connected to it in rotation.

In a preferred embodiment of the present invention, each of the deviation correction mechanisms includes a deviation correction block, a deviation correction rod, a telescopic rod, a gear and a deviation correction motor. The correction block is integrally formed, the upper mold is provided with a telescopic hole, the telescopic rod is installed in the telescopic hole and a rack is provided on the telescopic rod, the rack on the telescopic rod meshes with the gear, and the deviation correction motor and the upper mold It is fixedly connected and the output end of the deviation correction motor is fixedly connected with the gear.

In a preferred embodiment of the present invention, the rebound mechanism includes several rebound posts and several second springs, several rebound holes are provided on the lower mold base, and the lower ends of the several rebound posts are respectively Inserted in several springback holes, several second springs are sheathed on several rebound posts respectively.

In a preferred embodiment of the present invention, the lower mold base is provided with several limiting blocks, all of which are integrally formed with the lower mold base.

In a preferred embodiment of the present invention, each of the compensation mechanisms includes an elevating table and a compensation assembly, the elevating table is located above one end of the lower mold base, and the compensation assembly is installed on the upper end of the elevating table.

In a preferred embodiment of the present invention, the compensation components include slide rails, compensation cylinders, sliding blocks and compensation blocks, the compensation cylinders are arranged horizontally on the lifting platform, and the sliding rails are installed on the upper end of the lifting platform And the slide rail is located in front of the compensation cylinder, the slide block is fixedly connected to the output end of the compensation cylinder and the lower end of the slide block is slidingly matched with the slide rail, and the compensation block is hinged to one end of the slide block.

In a preferred embodiment of the present invention, several notches are provided on the side wall of the mold cavity, and several bumps are provided on the lower mold, and several bumps and several notches are arranged one by one. correspond.

In a preferred embodiment of the present invention, the two bending dies are fixedly connected to the lower die base through bolts.

The present invention provides a bending die with springback compensation function through improvement. Compared with the prior art, it has the following improvements and advantages:

(1) The two ends of the workpiece can be squeezed through the cooperation of the two correction components, so as to avoid excessive compensation of the workpiece and prevent the workpiece from being stuck on the upper mold;

(2) By adjusting the stroke of the compensation cylinder, the compensation angle of the compensation component to drive the workpiece to bend can be adjusted, so that when processing workpieces of different materials, the compensation angle can be adjusted, so that the workpiece is in a standard state after rebounding, making the mold applicable Suitable for processing workpieces of various materials;

(3) The lower mold base and the bending mold are connected by bolts, which is convenient for disassembly and replacement of different bending molds, thereby changing the diameter of the bending part of the workpiece.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the present invention will be further explained:

Fig. 1 is the three-dimensional structure schematic diagram of the present invention;

Fig. 2 is the top view of the present invention;

Fig. 3 is a sectional view along line A-A of Fig. 2;

Fig. 4 is the enlarged view of place B in Fig. 3;

Fig. 5 is a three-dimensional schematic diagram of the compensation mechanism in the present invention;

6 is a top view of Embodiment 2 of the present invention;

Fig. 7 is a sectional view along line C-C of Fig. 6;

Explanation of reference numerals: hydraulic device 1, lower mold base 2, upper mold 3, mold groove 4, deviation correction mechanism 5, deviation correction block 5a, deviation correction rod 5b, first spring 5c, telescopic rod 5d, telescopic hole 5e, deviation correction wheel 5f , rebound mechanism 6, rebound column 6a, second spring 6b, rebound hole 6c, lower mold 7, bending mold 8, compensation mechanism 9, lifting table 9a, compensation assembly 9b, slide rail 9b1, compensation cylinder 9b2, Sliding block 9b3, compensating block 9b4, gear 10, correction motor 11, rack 12, limit block 13, notch 14, bump 15.

Detailed ways

The present invention will be described in detail below in conjunction with accompanying drawings 1 to 7, and the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The present invention provides a bending die with springback compensation function through improvement;

Embodiment 1: As shown in Figures 1-5, it includes a hydraulic device 1 and a lower mold base 2, the hydraulic device 1 is installed on the side of the lower mold base 2, and the hydraulic device 1 is provided with an upper mold 3, so The upper mold 3 is provided with a mold groove 4, the upper mold 3 is located directly above the lower mold base 2 and both ends of the upper mold 3 are provided with a deviation correction mechanism 5, and the lower mold base 2 is provided with a rebound mechanism 6. The upper end of the rebound mechanism 6 is provided with a lower mold 7, and both ends of the lower mold 7 are provided with a bending mold 8, and the upper end surfaces of the two bending molds 8 are arc-shaped, and both The sides of each of the bending dies 8 are provided with a compensation mechanism 9; the hydraulic device 1 adopts an existing device, and the upper mold 3 is driven to move downward by the hydraulic device 1, and the upper mold 3 controls the rebound mechanism 6 and the rebound mechanism. The workpieces on 6 are pressed down together. When the workpiece moves to the two bending molds 8, the workpiece is squeezed through the groove formed by the upper mold 3, the lower mold 7 and the two bending molds 8, so that the workpiece The two ends of the workpiece are bent to a certain angle, and then the two ends of the workpiece are further bent through two compensation mechanisms 9, so that the two ends of the workpiece are in the standard position after rebounding.

Each of the correction mechanism 5 includes a correction block 5a, a correction rod 5b, a first spring 5c and a telescopic rod 5d. Integral molding, the upper mold 3 is provided with a telescopic hole 5e, the first spring 5c is installed in the telescopic hole 5e, and one end of the telescopic rod 5d is inserted in the telescopic hole 5e and connected with one end of the first spring 5c. Fixedly connected, the other end of the telescopic rod 5d is provided with a correction wheel 5f connected to it in rotation; when working, the two ends of the workpiece are bent under the extrusion of the two bending dies 8, and at the same time, the dry end is pressed On the workpiece, the deviation correction block 5a drives the deviation correction rod 5b to rotate, and at the same time, one side of the deviation correction rod 5b presses against the deviation correction wheel 5f and compresses the first spring 5c, so that the telescopic rod 5d enters the telescopic hole 5e. If the workpiece is over compensated, Then the telescopic rod 5d can be pushed out by the first spring 5c, and the bending part of the workpiece can be pushed to the standard position, and at the same time, excessive compensation at both ends of the workpiece can be prevented from being stuck on the upper mold 3 .

The rebound mechanism 6 includes several rebound posts 6a and several second springs 6b. The lower mold base 2 is provided with several rebound holes 6c, and the lower ends of the several rebound posts 6a are respectively inserted into several springs. In each rebound hole 6c, several second springs 6b are sleeved on several rebound columns 6a respectively; when the upper mold 3 moves downward, the lower mold 7 is pushed downward, and the second spring 6b at the lower end of the lower mold 7 The contraction makes the rebound rod shrink into the rebound hole 6c. After the bending process is completed, the rebound column 6a rises to lift the lower mold 7 and the workpiece by the elastic force of the second spring 6b to avoid The workpiece is engaged on the upper end of the lower mold base 2, which is convenient for blanking.

The lower mold base 2 is provided with several limit blocks 13, and all the limit blocks 13 are integrally formed with the lower mold base 2; the position of the lower mold 7 can be limited by the limit blocks 13, so that the two ends of the lower mold 7 They are respectively equal to the two bending dies 8, so as to prevent the lower die 7 from being too high or too low, resulting in multiple bends on the workpiece.

Each of the compensating mechanisms 9 includes an elevating platform 9a and a compensating assembly 9b, the elevating platform 9a is located above one end of the lower mold base 2, and the compensating assembly 9b is installed on the upper end of the elevating platform 9a; it can be adjusted by the elevating platform 9a The horizontal height of the compensating component 9b can adjust the height of the compensating component 9b to perform compensatory bending on both ends of the workpiece when the lengths of the two ends of the workpiece are different.

The compensation components 9b each include a slide rail 9b1, a compensation cylinder 9b2, a sliding block 9b3 and a compensation block 9b4, the compensation cylinder 9b2 is horizontally arranged on the lifting platform 9a, the slide rail 9b1 is installed on the upper end of the lifting platform 9a and The slide rail 9b1 is located in front of the compensation cylinder 9b2, the slide block 9b3 is fixedly connected to the output end of the compensation cylinder 9b2 and the lower end of the slide block 9b3 is slidingly fitted with the slide rail 9b1, and the compensation block 9b4 is hinged to one end of the slide block 9b3; The sliding block 9b3 is pushed forward by the compensating cylinder 9b2, and the slide rail 9b1 at the lower end of the sliding block 9b3 and its sliding cooperation can limit the sliding direction of the sliding block 9b3, and the sliding rail 9b1 can also support the sliding block 9b3. The block 9b3 drives the compensation block 9b4 to move forward to squeeze the bent end of the workpiece. Under the action of the compensation block 9b4 and the correction rod 5b, the one end of the workpiece is compensated for bending. When the compensation block 9b4 and the correction rod 5b are clamped When the workpiece is bent by the compensating block 9b4, the angle between the workpiece and the horizontal plane is constantly changing due to the change of the bending angle of the workpiece. Therefore, the compensating block 9b4 hinged with the sliding block 9b3 can make the compensating block 9b4 rotate during the rotation process. One side is always in contact with the workpiece, so as to avoid damage to the workpiece caused by the knuckles of the compensating block 9b4 pressing against the workpiece.

The side wall of the mold cavity 4 is provided with several gaps 14, and the lower mold 7 is provided with several bumps 15, and the several bumps 15 are in one-to-one correspondence with the plurality of the gaps 14; The block 15 is symmetrically arranged on both sides of the lower mold 7, which is convenient for the workpiece to be engaged on the upper end of the lower mold 7, and also avoids the position of the workpiece from shifting during the processing, resulting in processing failure. The gap 14 on the side wall of the mold cavity 4 is used for Engage with the bump 15 to prevent the bump 15 from separating the upper mold 3 and the lower mold 7, which will affect the bending process.

The two bending dies 8 are fixedly connected to the lower die base 2 by bolts; if the workpiece needs to be bent into curved shapes with different diameters, the bending dies 8 can be quickly disassembled and a new bending die 8 can be installed through the bolts .

The working principle of the present invention: determine the required compensation angle at the bending part of the workpiece through calculation, then place the workpiece on the lower mold 7, and drive the upper mold 3 to move downward through the power provided by the hydraulic device 1, and the upper mold 3 and the lower mold 7 Clamp the workpiece between the two, and at the same time, the upper mold 3 pushes the workpiece and the lower mold 7 to move downward, and the two ends of the workpiece are bent by the upper mold 3, the lower mold 7 and the two bending molds 8, and then passed The compensation cylinder 9b2 works to push the sliding block 9b3 to move, and the sliding block 9b3 drives the compensation block 9b4 to move, and the compensation block 9b4 pushes one end of the tool. By setting the stroke of the compensation cylinder 9b2 to limit the bending angle at which the compensation block 9b4 pushes one end of the tool, when the bending is completed After the bending process, the elastic force of the first spring 5c makes the lower mold 7 move upwards to lift the workpiece, which is convenient for blanking the workpiece.

Embodiment 2: As shown in Figure 6 and Figure 7, each of the correction mechanisms 5 includes a correction block 5a, a correction rod 5b, a telescopic rod 5d, a gear 10 and a correction motor 11, and the correction block 5a is rotatably connected to the mold In the slot 4, one end of the correction rod 5b is integrally formed with the correction block 5a, the upper mold 3 is provided with a telescopic hole 5e, the telescopic rod 5d is installed in the telescopic hole 5e and a rack is provided on the telescopic rod 5d 12. The rack 12 on the telescopic rod 5d meshes with the gear 10, the deviation correction motor 11 is fixedly connected to the upper mold 3 and the output end of the deviation correction motor 11 is fixedly connected to the gear 10; in the free state, the deviation correction motor 11 does not work, The gear 10 can rotate freely, so that when the telescopic rod 5d wants to move in the telescopic hole 5e, the gear 10 can rotate, so that the gear 10 will not prevent the rack 12 from moving into the telescopic hole 5e, and then the gear 10 is driven by the correction motor 11 Rotate to make the telescopic rod 5d move outward to push up one end of the workpiece forward, and press the excessively corrected workpiece to prevent the workpiece from being stuck on the upper mold 3 .

The deviation correcting assembly in Embodiment 1 works through the elastic force of the first spring 5c. If the hardness of the workpiece is relatively high, its effect may be poor, but for workpieces with low hardness, it can still achieve its effect and save energy at the same time. The deviation correction component in Example 2 works through the deviation correction motor 11, and is powered by the deviation correction motor 11, so that it can process workpieces with high hardness. Both have advantages and disadvantages, and can be selected according to the actual situation.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. a kind of working method of the Bending Mould with springback compensation function, it is characterised in that：Including hydraulic device（1）With under Die holder（2）, the hydraulic device（1）Mounted on lower die holder（2）Side, the hydraulic device（1）It is equipped with upper mold（3）, The upper mold（3）It is equipped with die cavity（4）, the upper mold（3）Positioned at lower die holder（2）Surface and upper mold（3）Two End is equipped with deviation correction mechanism（5）, the lower die holder（2）It is equipped with rebounding mechanism（6）, the rebounding mechanism（6）Upper end be equipped with Lower mold（7）, the lower mold（7）Both ends be equipped with Bending Mould（8）, two Bending Moulds（8）Upper surface it is equal It is arc-shaped, two Bending Moulds（8）Side be equipped with compensation mechanism（9）；Working method includes the following steps：Pass through It calculates and determines that workpiece is placed on lower mold by the offset angle that the needs of workpiece bending part carry out later（7）On, pass through hydraulic pressure Device（1）Power drive upper mold is provided（3）It moves down, upper mold（3）With lower mold（7）By Workpiece clamping the two it Between, while upper mold（3）Push workpiece and lower mold（7）It moves down, passes through upper mold（3）, lower mold（7）With two bendings Mold（8）The both ends of workpiece are bent, later by compensating cylinder（9b2）Work Promote sliding shoe (9b3) is mobile, sliding shoe (9b3) drives compensation block (9b4) mobile, and compensation block (9b4) pushes one end of tool, and the row of cylinder (9b2) is compensated by setting Journey pushes the angle of tool one end bending to pass through the first spring (5c) after completing Bending Processing to limit compensation block (9b4) Elastic force makes lower mold (7) moves up to jack up workpiece, convenient for carrying out blanking to workpiece.

2. the working method of the Bending Mould according to claim 1 with springback compensation function, it is characterised in that：Each The deviation correction mechanism（5）It include correction block（5a）, correction bar（5b）, the first spring（5c）And telescopic rod（5d）, the correction Block（5a）It is rotatably connected on die cavity（4）It is interior, the correction bar（5b）One end with correction block（5a）It is integrally formed, the upper mold （3）It is equipped with telescopic hole（5e）, first spring（5c）Mounted on telescopic hole（5e）It is interior, the telescopic rod（5d）One end insert It is connected on telescopic hole（5e）It is interior and with the first spring（5c）One end be fixedly connected, the telescopic rod（5d）The other end be equipped with and its The correction wheel of rotation connection（5f）.

3. the working method of the Bending Mould according to claim 1 with springback compensation function, it is characterised in that：Each The deviation correction mechanism（5）It include correction block（5a）, correction bar（5b）, telescopic rod（5d）, gear（10）With correction motor（11）, The correction block（5a）It is rotatably connected on die cavity（4）It is interior, the correction bar（5b）One end with correction block（5a）It is integrally formed, institute State upper mold（3）It is equipped with telescopic hole（5e）, the telescopic rod（5d）Mounted on telescopic hole（5e）Interior and telescopic rod（5d）On set There is rack（12）, the telescopic rod（5d）On rack（12）With gear（10）Engagement, motor of rectifying a deviation（11）With upper mold（3）Gu Fixed connection and correction motor（11）Output end and gear（10）It is fixedly connected.

4. the working method of the Bending Mould according to claim 1 with springback compensation function, it is characterised in that：It is described Rebounding mechanism（6）Including several rebound columns（6a）With several second springs（6b）, the lower die holder（2）It is equipped with several Spring back hole（6c）, several rebound columns（6a）Lower end be plugged on respectively several rebound hole（6c）It is interior, several second springs （6b）It is respectively sleeved at several rebound columns（6a）On.

5. the working method of the Bending Mould according to claim 4 with springback compensation function, it is characterised in that：It is described Lower die holder（2）It is equipped with several limited blocks（13）, all limited blocks（13）And lower die holder（2）It is integrally formed.

6. the working method of the Bending Mould according to claim 4 with springback compensation function, it is characterised in that：Each The compensation mechanism（9）It include lifting platform（9a）And compensation component（9b）, the lifting platform（9a）Positioned at lower die holder（2）One End top, the compensation component（9b）Mounted on lifting platform（9a）Upper end.

7. the working method of the Bending Mould according to claim 6 with springback compensation function, it is characterised in that：It is described Compensation component（9b）It include sliding rail（9b1）, compensation cylinder（9b2）, sliding shoe（9b3）And compensation block（9b4）, the compensation gas Cylinder（9b2）In being horizontally set on lifting platform（9a）On, the sliding rail（9b1）Mounted on lifting platform（9a）Upper end and sliding rail （9b1）Positioned at compensation cylinder（9b2）Front, the sliding shoe（9b3）With compensation cylinder（9b2）Output end be fixedly connected and Sliding shoe（9b3）Lower end and sliding rail（9b1）It is slidably matched, the compensation block（9b4）With sliding shoe（9b3）One end it is hinged.

8. the working method of the Bending Mould according to claim 1 with springback compensation function, it is characterised in that：It is described Die cavity（4）Side wall be equipped with several notches（14）, the lower mold（7）It is equipped with several convex blocks（15）, several institute State convex block（15）With notch described in several（14）It corresponds.

9. the working method of the Bending Mould according to claim 1 with springback compensation function, it is characterised in that：Two The Bending Mould（8）Pass through bolt and lower die holder（2）It is fixedly connected.