Workpiece bending angle adjusting tool and forming device of sheet metal stamping die

Abstract

The invention provides a workpiece bending angle adjusting tool and a forming device of a sheet metal stamping die, a workpiece comprises a bending part, the bending part is formed by bending a first end and a second end of the workpiece, and the bending part comprises a placing position and a bending angle adjusting assembly; the bending angle adjusting assembly comprises a movable bending block and an adjusting driving part, when the workpiece is fixed in the containing position, the movable bending block abuts against the bending part, and the adjusting driving part drives the movable bending block to move in the direction close to or away from the bending part so that the bending angle of the bending part can be adjusted. Through the acting force of the movable bending block on the bending part of the workpiece, the bending angle of the bending part is accurate and controllable.

Description

Technical Field

[0001] The invention relates to the technical field of mold adjustment and molding, and in particular to a workpiece bending angle adjustment tool and a molding device for a sheet metal stamping mold. Background Art

[0002] When sheet metal parts are being formed, internal stress will be generated inside the parts, and the internal stress accumulation is particularly concentrated at the forming corners; therefore, after the sheet metal parts are formed, some of the accumulated internal stress needs to be released, which will cause the mold surface of the sheet metal parts to shrink after forming, and the forming surface of the sheet metal parts to rebound. Bending is a common forming structure on sheet metal parts. The degree of rebound of the bending part is affected by many factors such as bending angle, material properties, stamping speed, and temperature. In actual production, in order to eliminate the impact of bending rebound, the existing technology is to increase the bending angle of the mold male and female dies by 2-3 degrees to offset the impact of rebound.

[0003] Since springback is affected by many factors, the conventional method of increasing the bending angle of the mold is not accurate enough to control the bending angle after springback, and it is impossible to accurately control the bending angle under different parameters. In addition, for some sheet metal parts with special structures or materials, such as fixture-type sheet metal parts, it is difficult to accurately compensate for their springback angle, and it is impossible to ensure the stable performance of the sheet metal parts after forming. Summary of the invention

[0004] In order to overcome the problems existing in the related art, one of the objects of the present invention is to provide a workpiece bending angle adjustment tool, which can accurately control the bending angle of the bending portion by applying force of a movable bending block to the bending portion of the workpiece.

[0005] A workpiece bending angle adjustment tool, the workpiece comprising a bending portion, the bending portion being formed by bending a first end of the workpiece and a second end of the workpiece, comprising a placement position and a bending angle adjustment component; The bending angle adjustment assembly includes a movable bending block and an adjusting drive. When the workpiece is fixed in the placement position, the movable bending block abuts against the bending portion, and the adjusting drive drives the movable bending block to move toward or away from the bending portion to achieve bending angle adjustment of the bending portion.

[0006] The present application drives the movable bending block to abut against the bending portion of the workpiece by adjusting the driving member. If the bending portion of the workpiece rebounds greatly, the driving member is adjusted to drive the movable bending block to a greater degree of abutment with the bending portion; if the bending portion of the workpiece rebounds less, the driving member is adjusted to drive the movable bending block to a lesser degree of abutment with the bending portion. By controlling the abutment degree between the movable bending block and the bending portion, the springback of the bending portion can be accurately compensated, thereby improving the accuracy of workpiece forming.

[0007] In a preferred technical solution of the present invention, a conveyor belt is also included, and an upper mold assembly and a lower mold assembly are respectively arranged on both sides of the conveyor belt. The upper mold assembly and the lower mold assembly can be close to or away from each other. When the upper mold assembly and the lower mold assembly are closed, a placement position is formed at the position of the conveyor belt, and the workpiece is suspended in the conveyor belt.

[0008] In the present application, the workpieces of the same batch are hung in batches in the conveyor belt after being formed. At this time, the placement position of the workpiece can be formed by the closing of the upper mold assembly and the lower mold assembly. Specifically, corresponding groove structures can be set in the upper mold assembly and the lower mold assembly so that the workpiece in the conveyor belt is fixed to form a limit for the workpiece. Only when the workpiece is fixed in position, the movable bending block can bend the first end and the second end of the workpiece again to overcome the rebound of the workpiece. The present application realizes the limit fixation of the workpiece by closing the upper mold assembly and the lower mold assembly. It has a simple structure and is easy to operate. It can also integrate the bending angle adjustment component in the upper mold assembly or the lower mold assembly, so that the adjustment tooling can be independent of the molding tooling and cooperate with each other to improve the convenience and accuracy of workpiece molding.

[0009] In a preferred technical solution of the present invention, a bending sleeve is provided in the upper die assembly, and the bending sleeve is located on a side of the bending portion of the workpiece away from the bending angle adjustment assembly.

[0010] The present application sets a movable bending block in the lower mold assembly, and sets a bending sleeve in the upper mold assembly. The bending sleeve is used to limit and protect the workpiece. When the upper mold assembly and the lower mold assembly are closed, the bending sleeve abuts against the area outside the bending portion of the workpiece to achieve the limit fixation of the workpiece and expose the bending portion of the workpiece. Specifically, when the workpiece is fixed in the placement position, the bending sleeve and the movable bending block are located on opposite sides of the workpiece. Assuming that the bending portion is located on the front of the workpiece, the bending sleeve abuts against the back of the workpiece, so that the bending sleeve can fix the back of the workpiece, and the movable bending block is used to correct the bending angle of the bending portion on the front of the workpiece, thereby improving the efficiency and accuracy of the bending correction.

[0011] In a preferred technical solution of the present invention, a movable bending block is provided in the lower mold assembly, and an adjusting drive member is provided on a side of the movable bending block away from the upper mold assembly.

[0012] When the movable bending block moves toward the bending part of the workpiece, the present application arranges the adjusting driving member on the side of the movable bending block away from the workpiece, which can avoid interference with the movement of the movable bending block and can also make full use of the space of the lower template to deploy the positions of the movable bending block and the adjusting driving member, thereby improving the design orderliness of the movable bending block and the adjusting driving member.

[0013] In a preferred technical solution of the present invention, the movable bending block is located in a limit block, the limit block is fixed in the lower mold assembly, and a limit channel for the movable bending block to pass through is provided in the limit block, and the extension direction of the limit channel is parallel to the closing direction of the upper mold assembly and the lower mold assembly.

[0014] In the present application, the limiting channel is used to limit the moving path of the movable bending block. When the workpiece is fixed in the placement position, the workpiece is fixed in the upper mold assembly, and the second end of the workpiece in the bending portion or the first end of the workpiece is facing the movable bending block. The movable bending block only needs to move along the set path to achieve further bending of the bending portion. By limiting the moving path of the movable bending block through the limiting channel in the limiting block, it can be ensured that the moving path of the movable bending block is fixed. In this case, adjusting the driving member will only cause the displacement change of the movable bending block along the limiting channel, avoiding the displacement of the movable bending block. In this way, the further bending of the bending portion can be achieved with minimal energy consumption, avoiding energy waste, and reducing the difficulty of controlling the movable bending block.

[0015] In a preferred technical solution of the present invention, the adjusting drive member includes an insert block, which can move in a direction perpendicular to the limiting channel, and an inclined portion is provided at the end of the insert block close to the limiting block, and the inclined portion abuts against the movable bending block; when different positions of the inclined portion in the insert block abut against the movable bending block, the distance between the movable bending block and the bending portion is different.

[0016] In the present application, the insert block and the movable bending block are both located in the lower mold assembly, and both are movable, and the moving directions are perpendicular to each other; an inclined portion that can abut against the movable bending block is provided at the front end of the insert block, and when different positions of the inclined portion abut against the movable bending block, the movable bending block can be pushed to different positions in the limiting channel, that is, the present application can achieve displacement adjustment of the movable bending block along the limiting channel through the cooperation between the insert block and the movable bending block, and has a simple structure and convenient operation.

[0017] In a preferred technical solution of the present invention, a slide groove is provided in the lower mold assembly, the insert block is located in the slide groove, and a rotating shaft is provided on the side of the insert block away from the limit block, and the rotating shaft can drive the insert block to move.

[0018] In the present application, the slide groove is used to limit the displacement direction of the plug block. In actual operation, it is necessary to ensure that the slide groove is provided with an opening on the side close to the movable bending block, to ensure that the mutually perpendicular movable bending block and the plug block can abut against each other, and to avoid the movable bending block and the outer side of the slide groove from abutting against each other. Only in this way can the inclined part of the plug block push the movable bending block. The present application limits the moving trajectory of the plug block through the slide groove, to avoid positional deviation when the plug block slides, and to improve the control accuracy.

[0019] In a preferred technical solution of the present invention, the rotating shaft passes through the fixing block, and a stop screw is provided in the fixing block.

[0020] In the present application, the rotating shaft drives the plug block to move along the slide slot. When the position of the rotating shaft is determined, the position where the plug block abuts against the movable bending block is also determined, and the extrusion displacement of the movable bending block relative to the bending portion of the workpiece is also determined. At this time, the stop screw in the fixed block is tightened to fix the rotating shaft and the fixed block, which can ensure that the movable bending block exerts a constant force on the bending portion. After a period of time, the bending portion can be corrected. The present application can limit the position of the rotating shaft through the cooperation of the fixed block and the stop screw, thereby ensuring that the force exerted by the movable bending block on the bending portion is constant, thereby improving the calibration accuracy.

[0021] In a preferred technical solution of the present invention, there are two fixing blocks, and the two fixing blocks are arranged in parallel along the extension direction of the rotating shaft.

[0022] In the present application, the moving direction of the rotating shaft is the same as the moving direction of the insert block, both of which are perpendicular to the closing direction of the upper mold assembly and the lower mold assembly. Two fixed blocks are sequentially arranged in this direction for fixing or loosening the rotating shaft. When the stop screw is loosened, the rotating shaft can drive the insert block to move. When the stop screw is tightened, the position of the rotating shaft is fixed. At this time, the positions of the insert block and the movable bending block are also fixed, ensuring that the force exerted by the movable bending block on the bending part is constant, thereby improving the calibration accuracy.

[0023] The second purpose of the present application is to provide a forming device for a sheet metal stamping die, including a workpiece bending angle adjustment tool as described above.

[0024] The present application adjusts the bending angle of a workpiece formed by a sheet metal stamping die through a bending angle adjustment tool. Specifically, by controlling the abutment degree between the movable bending block and the bending part, the springback of the bending part is accurately compensated, thereby improving the forming accuracy of the sheet metal stamping die.

[0025] The beneficial effects of the present invention are: The present invention provides a workpiece bending angle adjustment tool, comprising a movable bending block and an adjusting drive, and the workpiece comprises a bending portion, the bending portion is formed by bending the first end of the workpiece and the second end of the workpiece, when the workpiece is fixed in the placement position, the movable bending block abuts against the bending portion, and the adjusting drive drives the movable bending block to move in a direction close to or away from the bending portion, so as to adjust the bending angle of the bending portion. The present application drives the movable bending block to abut against the bending portion in the workpiece by the adjusting drive. If the springback of the bending portion in the workpiece is large, the adjusting drive drives the movable bending block to abut against the bending portion to a large extent; if the springback of the bending portion in the workpiece is small, the adjusting drive drives the movable bending block to abut against the bending portion to a small extent. By controlling the abutment degree between the movable bending block and the bending portion, the springback of the bending portion can be accurately compensated, thereby improving the precision of workpiece forming.

[0026] The present application also provides a forming device for a sheet metal stamping die, including a workpiece bending angle adjustment tool as described above, and the bending angle of the workpiece formed by the sheet metal stamping die is adjusted by the bending angle adjustment tool. Specifically, by controlling the abutment degree between the movable bending block and the bending part, the springback of the bending part can be accurately compensated to improve the forming accuracy of the sheet metal stamping die. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the structure in which the workpiece is placed in the conveyor belt in this application; Figure 2 A side schematic diagram of a workpiece in this application; Figure 3 It is a schematic diagram of the assembly of the workpiece and the bending angle adjustment component in this application; Figure 4 This is an overall schematic diagram of the bending angle adjustment assembly in this application; Figure 5 This is a schematic diagram of the structure when the movable bending block in the present application is located away from the bending portion; Figure 6 It is a schematic diagram of the structure when the movable bending block in the present application is located near the bending portion.

[0028] Reference numerals: 1. Upper die base; 2. Upper clamping plate; 3. Upper stop plate; 4. Upper stripping plate; 5. Lower template; 6. Lower pad; 7. Lower die base; 8. Bending sleeve; 9. Limit block; 10. Movable bending block; 11. Insert block; 12. Fixed block; 13. Rotating shaft; 14. Fastening screw; 15. Fastening pin; 16. Stop screw; 17. Slide; 20. Conveyor belt; 21. The first end of the workpiece; 22. The second end of the workpiece. DETAILED DESCRIPTION

[0029] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0030] The terms used in the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The singular forms "a", "the" and "the" used in the present invention and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0031] It should be understood that although the terms "first", "second", "third", etc. may be used to describe various information in the present invention, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0032] It should be noted that in the drawings of the specification, Figure 1 and Figure 3 is a top view, Figure 4 , Figure 5 and Figure 6 This is a side view and is obtained by rotating 90 degrees clockwise. Figure 4 , Figure 5 and Figure 6 The direction of gravity is from the right side of the image to the left side of the image. Example 1

[0033] like Figure 1-Figure 6 As shown, this embodiment provides a workpiece bending angle adjustment tool, including a movable bending block 10 and an adjustment drive member, wherein the workpiece includes a bending portion, and the bending portion is formed by bending a first end 21 of the workpiece and a second end 22 of the workpiece. The first end 21 of the workpiece and the second end 22 of the workpiece refer to two surfaces in a sheet metal workpiece.

[0034] When the workpiece is fixed in the placement position, the movable bending block 10 abuts against the bending portion, and the adjustment drive member drives the movable bending block 10 to move toward or away from the bending portion to adjust the bending angle of the bending portion.

[0035] The present application drives the movable bending block 10 to abut against the bending portion of the workpiece by adjusting the driving member. If the bending portion of the workpiece rebounds greatly, the driving member is adjusted to drive the movable bending block 10 to abut against the bending portion to a greater extent; if the bending portion of the workpiece rebounds less, the driving member is adjusted to drive the movable bending block 10 to abut against the bending portion to a lesser extent. By controlling the abutment degree between the movable bending block 10 and the bending portion, the springback of the bending portion can be accurately compensated, thereby improving the accuracy of workpiece forming.

[0036] The workpiece of the present application includes a bending portion, and the workpiece is formed by a sheet metal die tooling. During the workpiece forming process, the bending portion will rebound after forming, thereby making the angle of the bending portion greater than the target value of the workpiece design. The bending angle of the bending portion in the present application refers to the angle between the first end 21 of the workpiece and the second end 22 of the workpiece, such as Figure 2 As shown. If in actual operation, the target angle between the first end 21 of the workpiece and the second end 22 of the workpiece is x, then the actual angle between the first end 21 of the workpiece and the second end 22 of the workpiece after forming is x+y, y is usually 2-3°, and in this case, it is necessary to calibrate the bending portion of the workpiece using the bending angle adjustment assembly provided in this embodiment after the workpiece is formed, so that the angle between the first end 21 of the workpiece and the second end 22 of the workpiece becomes smaller to reach the preset x.

[0037] Since the degree of springback of the bending part in the workpiece is affected by many factors such as the bending angle, material properties, stamping speed, temperature, etc., for the same batch of workpieces, that is, the workpieces with the same raw materials and processing technology, the springback degree can be judged by empirical values, or by forming and testing one or more samples, and then the springback degree of this batch of workpieces can be determined. In this way, the specific displacement of the movable bending block 10 towards the bending part of the workpiece can be obtained by adjusting the driving member during the forming correction process of this batch of workpieces, thereby realizing batch springback correction of workpieces.

[0038] In actual operation, for the same batch of workpieces, the actual angle between the first end 21 and the second end 22 of the workpiece can be measured after the workpiece is formed, that is, x+y; then the movable bending block 10 is driven by the adjusting drive member to move toward the bending portion in the workpiece, and the bending portion is squeezed, so that the bending portion is further bent to form a bending angle of x, and the displacement of the adjusting drive member or the movable bending block 10 is recorded at this time. For the same batch of workpieces, it is only necessary to control the displacement of the adjusting drive member or the movable bending block 10 to always maintain the above displacement value to ensure that the springback correction of this batch of workpieces is accurate. Example 2

[0039] like Figure 1-Figure 6As shown, this embodiment provides a workpiece bending angle adjustment tool, including a movable bending block 10 and an adjustment drive member, wherein the workpiece includes a bending portion, and the bending portion is formed by bending a first end 21 of the workpiece and a second end 22 of the workpiece. When the workpiece is fixed in the placement position, the movable bending block 10 abuts against the bending portion, and the adjustment drive member drives the movable bending block 10 to move toward or away from the bending portion, so as to adjust the bending angle of the bending portion.

[0040] Furthermore, it also includes a conveyor belt 20, and an upper mold assembly and a lower mold assembly are respectively arranged on both sides of the conveyor belt 20. The upper mold assembly and the lower mold assembly can be close to or away from each other. When the upper mold assembly and the lower mold assembly are closed, a placement position is formed at the position of the conveyor belt 20, and the workpiece is suspended in the conveyor belt 20.

[0041] After forming, the workpieces of the same batch in the present application are hung in batches in the conveyor belt 20. At this time, the placement position of the workpiece can be formed by the closing of the upper mold assembly and the lower mold assembly. Specifically, corresponding groove structures can be set in the upper mold assembly and the lower mold assembly so that the workpiece in the conveyor belt 20 is fixed to form a limit for the workpiece. Only when the workpiece is fixed in position, the movable bending block 10 can bend the first end 21 and the second end 22 of the workpiece again to overcome the rebound of the workpiece. The present application realizes the limit fixation of the workpiece by closing the upper mold assembly and the lower mold assembly. It has a simple structure and is easy to operate. It can also integrate the bending angle adjustment component in the upper mold assembly or the lower mold assembly, so that the adjustment tooling can be independent of the molding tooling and cooperate with each other to improve the convenience and accuracy of workpiece molding.

[0042] Furthermore, a bending sleeve 8 is provided in the upper die assembly, and the bending sleeve 8 is located on a side of the bending portion of the workpiece away from the bending angle adjustment assembly.

[0043] The present application sets a movable bending block 10 in the lower mold assembly, and sets a bending sleeve 8 in the upper mold assembly. The bending sleeve 8 is used to limit and protect the workpiece. When the upper mold assembly and the lower mold assembly are molded, the bending sleeve 8 abuts against the area outside the bending portion of the workpiece to achieve the limit fixation of the workpiece and expose the bending portion of the workpiece. Specifically, when the workpiece is fixed in the placement position, the bending sleeve 8 and the movable bending block 10 are located on opposite sides of the workpiece. Assuming that the bending portion is located on the front of the workpiece, the bending sleeve 8 abuts against the back of the workpiece, so that the bending sleeve 8 can fix the back of the workpiece. The movable bending block 10 is used to correct the bending angle of the bending portion on the front of the workpiece, thereby improving the efficiency and accuracy of the bending correction.

[0044] Furthermore, a movable bending block 10 is provided in the lower mold assembly, and an adjusting driving member is provided on a side of the movable bending block 10 away from the upper mold assembly.

[0045] When the movable bending block 10 moves toward the bending part of the workpiece, the present application sets the adjusting drive component on the side of the movable bending block 10 away from the workpiece, which can avoid interference with the movement of the movable bending block 10 and can also make full use of the space of the lower template 5 to deploy the positions of the movable bending block 10 and the adjusting drive component, thereby improving the design orderliness of the movable bending block 10 and the adjusting drive component.

[0046] Furthermore, the movable bending block 10 is located in the limit block 9, the limit block 9 is fixed in the lower mold assembly, and the limit block 9 is provided with a limit channel for the movable bending block 10 to pass through, and the extension direction of the limit channel is parallel to the closing direction of the upper mold assembly and the lower mold assembly.

[0047] In the present application, the limiting channel is used to limit the moving path of the movable bending block 10. When the workpiece is fixed in the placement position, the workpiece is fixed in the upper mold assembly, and the second end 22 of the workpiece in the bending portion or the first end 21 of the workpiece is facing the movable bending block 10. The movable bending block 10 only needs to move along the set path to achieve further bending of the bending portion. By limiting the moving path of the movable bending block 10 through the limiting channel in the limiting block 9, it can be ensured that the moving path of the movable bending block 10 is fixed. In this case, adjusting the driving member will only cause the displacement change of the movable bending block 10 along the limiting channel, avoiding the displacement of the movable bending block 10. In this way, the further bending of the bending portion can be achieved with minimal energy consumption, avoiding energy waste, and reducing the difficulty of controlling the movable bending block 10.

[0048] Furthermore, the adjusting drive member includes an insert block 11, which can move in a direction perpendicular to the limiting channel. The end of the insert block 11 close to the limiting block 9 is provided with an inclined portion, and the inclined portion abuts against the movable bending block 10; when different positions of the inclined portion in the insert block 11 abut against the movable bending block 10, the distance between the movable bending block 10 and the bending portion is different.

[0049] In the present application, the insert block 11 and the movable bending block 10 are both located in the lower mold assembly, and both are movable, and the moving directions are perpendicular to each other; an inclined portion that can abut against the movable bending block 10 is provided at the front end of the insert block 11, and when different positions of the inclined portion abut against the movable bending block 10, the movable bending block 10 can be pushed to different positions in the limiting channel, that is, the present application can achieve displacement adjustment of the movable bending block 10 along the limiting channel through the cooperation between the insert block 11 and the movable bending block 10, and has a simple structure and convenient operation.

[0050] Furthermore, a slide groove 17 is provided in the lower mold assembly, and the insert block 11 is located in the slide groove 17. A rotating shaft 13 is provided on the side of the insert block 11 away from the limiting block 9, and the rotating shaft 13 can drive the insert block 11 to move.

[0051] In the present application, the slide groove 17 is used to limit the displacement direction of the plug block 11. In actual operation, it is necessary to ensure that the slide groove 17 is provided with an opening on the side close to the movable bending block 10 to ensure that the movable bending block 10 and the plug block 11, which are perpendicular to each other, can abut against each other, and avoid the movable bending block 10 and the outer side of the slide groove 17 from abutting against each other. Only in this way can the inclined part of the plug block 11 push the movable bending block 10. The present application limits the moving trajectory of the plug block 11 through the slide groove 17, avoids the position deviation of the plug block 11 when sliding, and improves the control accuracy.

[0052] Furthermore, the rotating shaft 13 passes through the fixing block 12 , and a set screw 16 is provided in the fixing block 12 .

[0053] In the present application, the rotating shaft 13 drives the insert block 11 to move along the slide groove 17. When the position of the rotating shaft 13 is determined, the position where the insert block 11 abuts against the movable bending block 10 is also determined, and the extrusion displacement of the movable bending block 10 relative to the bending portion of the workpiece is also determined. At this time, the stop screw 16 in the fixed block 12 is tightened to fix the rotating shaft 13 and the fixed block 12, so as to ensure that the movable bending block 10 exerts a constant force on the bending portion. After a period of time, the bending portion can be corrected. The present application can limit the position of the rotating shaft 13 through the cooperation of the fixed block 12 and the stop screw 16, thereby ensuring that the force exerted by the movable bending block 10 on the bending portion is constant, thereby improving the calibration accuracy.

[0054] Furthermore, there are two fixing blocks 12 , and the two fixing blocks 12 are arranged in parallel along the extension direction of the rotating shaft 13 .

[0055] In the present application, the moving direction of the rotating shaft 13 is the same as the moving direction of the plug block 11, both of which are perpendicular to the closing direction of the upper mold assembly and the lower mold assembly. Two fixed blocks 12 are sequentially arranged in this direction to fix or loosen the rotating shaft 13. When the stop screw 16 is loosened, the rotating shaft 13 can drive the plug block 11 to move. When the stop screw 16 is tightened, the position of the rotating shaft 13 is fixed. At this time, the positions of the plug block 11 and the movable bending block 10 are also fixed, ensuring that the force exerted by the movable bending block 10 on the bending part is constant, thereby improving the calibration accuracy. Example 3

[0056] like Figure 1-Figure 6As shown, this embodiment provides a workpiece bending angle adjustment tool, including a movable bending block 10 and an adjustment drive member, wherein the workpiece includes a bending portion, and the bending portion is formed by bending a first end 21 of the workpiece and a second end 22 of the workpiece. When the workpiece is fixed in the placement position, the movable bending block 10 abuts against the bending portion, and the adjustment drive member drives the movable bending block 10 to move toward or away from the bending portion, so as to adjust the bending angle of the bending portion.

[0057] Specifically, Figure 1-Figure 2 As shown, the workpiece of this embodiment includes a bending portion, and the bending angle of the bending portion refers to the angle between the first end 21 of the workpiece and the second end 22 of the workpiece, such as Figure 2 After the workpiece is formed, there is a springback phenomenon, that is, the bending angle of the bending portion becomes larger, and the bending angle adjustment component provided in this embodiment needs to be used to calibrate the bending portion in the workpiece so that the angle between the first end 21 of the workpiece and the second end 22 of the workpiece becomes smaller to reach a preset value.

[0058] like Figure 1 As shown, in this embodiment, the workpieces are suspended in batches in the conveyor belt 20, such as Figure 2 As shown, when the workpiece is suspended in the conveyor belt 20 , the bent portions of the workpiece are located on opposite sides of the conveyor belt 20 .

[0059] In order to calibrate the workpiece in the conveyor belt 20, an upper mold assembly and a lower mold assembly are respectively provided on both sides of the conveyor belt 20 in this embodiment. The upper mold assembly and the lower mold assembly can be close to or away from each other. When the upper mold assembly and the lower mold assembly are closed, a placement position is formed at the position of the conveyor belt 20, and the workpiece is suspended in the conveyor belt 20.

[0060] like Figure 4-Figure 6 As shown, the upper die assembly in the present application includes an upper die base 1, an upper clamping plate 2, an upper stop plate 3 and an upper stripping plate 4 in sequence, wherein the upper die base 1 and the upper clamping plate 2 are stacked and fixed together by fastening screws 14 and fastening pins 15. The upper stop plate 3 and the upper stripping plate 4 are fixed together by fastening screws 14 and fastening pins 15. The upper stop plate 3 and the upper stripping plate 4 are connected together with the upper die base 1 and the upper clamping plate 2 through an equal height sleeve (not shown in the figure) and a spring (not shown in the figure), and can move up and down relative to the upper die base 1 and the upper clamping plate 2.

[0061] A bending sleeve 8 is provided in the upper mold assembly, and the bending sleeve 8 is located on the side of the bending portion of the workpiece away from the bending angle adjustment assembly. Specifically, the bending sleeve 8 can prevent the side deformation of the product during fine-tuning, and the bending sleeve 8 is fixed in the upper stripping plate 4 by fastening screws 14.

[0062] The lower mold assembly is provided with a movable bending block 10, and an adjusting driving member is provided on the side of the movable bending block 10 away from the upper mold assembly. Specifically, the movable bending block 10 is located in a limiting block 9, the limiting block 9 is fixed in the lower mold assembly, and the limiting block 9 is provided with a limiting channel for the movable bending block 10 to pass through, and the extension direction of the limiting channel is parallel to the mold closing direction of the upper mold assembly and the lower mold assembly.

[0063] Specifically, the adjustment drive member includes an insert block 11, a slide slot 17, a rotating shaft 13 and a fixed block 12, wherein the insert block 11 can move in a direction perpendicular to the limiting channel, and an inclined portion is provided at the end of the insert block 11 close to the limiting block 9, and the inclined portion abuts against the movable bending block 10; when different positions of the inclined portion in the insert block 11 abut against the movable bending block 10, the distance between the movable bending block 10 and the bending portion is different. The insert block 11 is located in the slide slot 17, and a rotating shaft 13 is provided on the side of the insert block 11 away from the limiting block 9, and the rotating shaft 13 can drive the insert block 11 to move. The rotating shaft 13 passes through the fixed block 12, and a stop screw 16 is provided in the fixed block 12, and the stop screw 16 is used to fix the rotating shaft 13 and the fixed block 12.

[0064] Specifically, Figure 4-Figure 6 As shown, the lower mold assembly includes a lower mold plate 5, a lower pad 6, and a lower mold base 7 in sequence; and the lower mold plate 5, the lower pad 6, and the lower mold base 7 are fixed together by fastening screws 14 and fastening pins 15. The limit block 9 is fastened to the lower mold plate 5 by fastening screws 14. The limit block 9 is provided with a limit channel for the movable bending block 10 to pass through. The extension direction of the limit channel is parallel to the mold closing direction of the upper mold assembly and the lower mold assembly. The function of the limit block 9 is to limit the movement trajectory of the movable bending block 10 so that it can only move along the mold closing direction parallel to the upper mold assembly and the lower mold assembly, and to prevent it from popping out of the lower mold assembly due to inertia when it moves toward the direction close to the upper mold assembly. The movable bending block 10 can move in the limit channel in the limit block 9 along the mold closing direction parallel to the upper mold assembly and the lower mold assembly, and the side of the movable bending block 10 away from the upper mold assembly contacts the plug block 11. The plug block 11 can slide in the slide groove 17, and the extension direction of the slide groove 17 is perpendicular to the closing direction of the upper mold assembly and the lower mold assembly. The front end of the plug block 11 contacts the end of the movable bending block 10 away from the upper mold assembly. The rear end of the plug block 11, that is, the end away from the movable bending block 10, is provided with an internal threaded hole, and the internal threaded hole is connected to the front end of the rotating shaft 13. The front end of the plug block 11 is provided with an inclined portion, and the inclined portion abuts against the movable bending block 10; when different positions of the inclined portion abut against the movable bending block 10, the movable bending block 10 can be pushed to different positions in the limiting channel. Specifically, from the front end of the plug block to the rear end of the plug block, the distance between the inclined portion and the upper mold assembly decreases successively.

[0065] The front end of the rotating shaft 13 is provided with an external thread that can be matched with the internal thread hole in the insert block 11, and the rear end of the rotating shaft 13 is provided with a notch, into which a sheet or a flat-blade screwdriver can be inserted to drive the rotating shaft 13 to rotate.

[0066] The rotating shaft 13 is fixed between the two sets of fixed blocks 12, and the rotating shaft 13 can rotate freely. The fixed block 12 is fixed to the lower die base 7 by means of a fastening screw 14 and a fastening pin 15. An internal threaded through hole is provided in the fixed block 12, and a stop screw 16 is located in the internal threaded through hole. The tightness of the rotation of the rotating shaft 13 can be adjusted by adjusting the depth of the stop screw 16 in the internal threaded through hole. When the rotating shaft 13 is rotated to a suitable position, tightening the stop screw 16 can fix the rotating shaft 13 to prevent the movable bending block 10 from moving during the fine-tuning process. In the present application, the rotating shaft 13 drives the insert block 11 to move along the slide groove 17. When the position of the rotating shaft 13 is determined, the position where the insert block 11 abuts against the movable bending block 10 is also determined, and the extrusion displacement of the movable bending block 10 relative to the bending portion of the workpiece is also determined. At this time, the stop screw 16 in the fixed block 12 is tightened to fix the rotating shaft 13 and the fixed block 12, so as to ensure that the movable bending block 10 exerts a constant force on the bending portion. After a period of time, the bending portion can be corrected. The present application can limit the position of the rotating shaft 13 through the cooperation of the fixed block 12 and the stop screw 16, thereby ensuring that the force exerted by the movable bending block 10 on the bending portion is constant, thereby improving the calibration accuracy.

[0067] like Figure 5 As shown, this is the initial working state, the positions of the insert block 11 and the movable bending block 10 are as shown in the attached Figure 5 As shown, the movable bending block 10 is located far away from the bending portion in the workpiece and does not contact the workpiece, so there is no adjustment effect.

[0068] like Figure 6 As shown in FIG. 1 , when the rotating shaft 13 drives the insert block 11 to move along the axis of the rotating shaft 13 toward the direction close to the movable bending block 10, since the front end of the insert block 11 is provided with an inclined portion, the inclined portion abuts against the end of the movable bending block 10 away from the upper mold assembly, thereby driving the movable bending block 10 to move toward the direction close to the workpiece. At this time, the positions of the insert block 11 and the movable bending block 10 are as shown in FIG. Figure 6 As shown, the movable bending block 10 moves to a position close to the bending portion in the workpiece and abuts against the bending portion, so that the fine-tuning angle is maximized.

[0069] like Figure 5 As shown, Figure 5The direction of gravity points from the right side of the picture to the left side of the picture. When the rotating shaft 13 drives the plug block 11 to move along the axial direction of the rotating shaft 13 in the direction away from the movable bending block 10, since the front end of the plug block 11 is provided with an inclined portion, the inclined portion abuts against the end of the movable bending block 10 away from the upper mold assembly. The movable bending block 10 is affected by gravity and moves in the direction away from the workpiece and returns to the initial working state.

[0070] Since the degree of springback of the bending part in the workpiece is affected by many factors such as the bending angle, material properties, stamping speed, temperature, etc., for the same batch of workpieces, that is, the workpieces with the same raw materials and processing technology, the springback degree can be judged by empirical values, or by forming and testing one or more samples, and then the springback degree of this batch of workpieces can be determined. In this way, the specific displacement of the movable bending block 10 towards the bending part of the workpiece can be obtained by adjusting the driving member during the forming correction process of this batch of workpieces, thereby realizing batch springback correction of workpieces. Example 4

[0071] This embodiment provides a forming device for a sheet metal stamping die, including a workpiece bending angle adjustment tool as described above, and also includes a sheet metal die tool. After the workpiece is formed by the die in the sheet metal die tool, it is rebound adjusted by the bending angle adjustment tool as described above.

[0072] The workpiece is formed by a sheet metal die tooling. During the workpiece forming process, the bending portion will rebound after forming, thereby making the angle of the bending portion greater than the target value designed for the workpiece. In actual operation, for the same batch of workpieces, the actual angle between the first end 21 of the workpiece and the second end 22 of the workpiece can be measured after the workpiece is formed, that is, x+y; then the movable bending block 10 is driven by the adjusting drive member to move toward the bending portion in the workpiece, extruding the bending portion, so that the bending portion is further bent to form a bending angle of x, and the displacement of the adjusting drive member or the movable bending block 10 is recorded at this time. For the same batch of workpieces, it is only necessary to control the displacement of the adjusting drive member or the movable bending block 10 to always maintain the above displacement value to ensure that the rebound correction of this batch of workpieces is accurate.

[0073] The present application adjusts the bending angle of the workpiece formed by the sheet metal stamping die through the bending angle adjustment tool. Specifically, by controlling the abutment degree between the movable bending block 10 and the bending part, the springback of the bending part is accurately compensated, thereby improving the forming accuracy of the sheet metal stamping die.

[0074] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings. In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0075] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0076] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this application. The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A workpiece bending angle adjustment tool, wherein the workpiece comprises a bending portion, wherein the bending portion is formed by bending a first end (21) of the workpiece and a second end (22) of the workpiece, wherein: Including placement position and bending angle adjustment components; The bending angle adjustment component comprises a movable bending block (10) and an adjustment drive member. When the workpiece is fixed in the placement position, the movable bending block (10) abuts against the bending portion, and the adjustment drive member drives the movable bending block (10) to move in a direction approaching or away from the bending portion, so as to adjust the bending angle of the bending portion.

2. A workpiece bending angle adjustment tool according to claim 1, characterized in that: It also includes a conveyor belt (20), with an upper mold assembly and a lower mold assembly respectively arranged on both sides of the conveyor belt (20), and the upper mold assembly and the lower mold assembly can be close to or away from each other. When the upper mold assembly and the lower mold assembly are closed, a placement position is formed at the position of the conveyor belt (20), and the workpiece is suspended in the conveyor belt (20).

3. A workpiece bending angle adjustment tool according to claim 2, characterized in that: A bending sleeve (8) is provided in the upper die assembly, and the bending sleeve (8) is located on a side of the bending portion of the workpiece away from the bending angle adjustment assembly.

4. A workpiece bending angle adjustment tool according to claim 2, characterized in that: A movable bending block (10) is arranged in the lower die assembly, and an adjusting driving member is arranged on a side of the movable bending block (10) away from the upper die assembly.

5. A workpiece bending angle adjustment tool according to claim 4, characterized in that: The movable bending block (10) is located in the limiting block (9), the limiting block (9) is fixed in the lower mold assembly, and a limiting channel for the movable bending block (10) to pass through is provided in the limiting block (9), and the extension direction of the limiting channel is parallel to the closing direction of the upper mold assembly and the lower mold assembly.

6. A workpiece bending angle adjustment tool according to claim 5, characterized in that: The adjusting drive member comprises an insert block (11), the insert block (11) being movable in a direction perpendicular to the limiting channel, and an inclined portion being arranged at an end of the insert block (11) close to the limiting block (9), the inclined portion being in contact with the movable bending block (10); when different positions of the inclined portion in the insert block (11) are in contact with the movable bending block (10), the distance between the movable bending block (10) and the bending portion is different.

7. A workpiece bending angle adjustment tool according to claim 6, characterized in that: A slide groove (17) is provided in the lower mold assembly, and the insert block (11) is located in the slide groove (17). A rotating shaft (13) is provided on a side of the insert block (11) away from the limiting block (9), and the rotating shaft (13) can drive the insert block (11) to move.

8. A workpiece bending angle adjustment tool according to claim 7, characterized in that: The rotating shaft (13) passes through the fixing block (12), and a stop screw (16) is provided in the fixing block (12).

9. A workpiece bending angle adjustment tool according to claim 8, characterized in that: There are two fixed blocks (12), and the two fixed blocks (12) are arranged in parallel along the extension direction of the rotating shaft (13).

10. A forming device for a sheet metal stamping die, characterized in that: It comprises a workpiece bending angle adjustment tool as described in any one of claims 1-9.

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