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CN-117282813-B - Progressive die negative angle bending forming device

CN117282813BCN 117282813 BCN117282813 BCN 117282813BCN-117282813-B

Abstract

The application provides a progressive die negative angle bending forming device which comprises an upper die holder, a pressing die and a lower die holder, wherein a stamping part is fixed on the upper die holder, forming parts are respectively and slidably arranged on two opposite sides of the stamping part, the pressing die is slidably arranged on the upper die holder, an elastic part is arranged between the pressing die and the upper die holder and used for forcing the pressing die to move downwards normally, the lower die holder is provided with a stamping station, two movable inserts are slidably arranged on the lower die holder and are respectively positioned on two opposite sides of the stamping station, a guide structure is arranged between the movable inserts and the pressing die and used for forcing the movable inserts to move towards a direction close to the forming parts when the progressive die is clamped, the first inner edge and the third inner edge can be formed by stamping, and one forming part is provided with a side ejection mechanism which forces the side ejection mechanism to move towards a direction close to the movable inserts when the progressive die is clamped. Based on this, can once accomplish the punching press processing of bending of sheet metal product to can accomplish the drawing of patterns operation smoothly.

Inventors

  • LIN SHIDA
  • YU WEIFA
  • XU LIMING
  • WANG XIUFANG
  • WANG YONGHENG
  • ZHAO QINGLONG

Assignees

  • 天津世亚模具股份有限公司

Dates

Publication Date
20260505
Application Date
20230927

Claims (6)

  1. 1. The progressive die negative angle bending and forming device is characterized by comprising an upper die holder (2), a pressing die (3) and a lower die holder (4), wherein the upper die holder (2) is fixedly provided with a stamping part (21), and forming parts (22) are respectively and slidably arranged on two opposite sides of the stamping part (21); The pressing die (3) is movably arranged at the bottom of the upper die holder (2), an elastic piece is arranged between the pressing die (3) and the upper die holder (2) and used for forcing the pressing die (3) to move downwards in a normal state, and the pressing die (3) is provided with a stepping groove (31) for passing through the stamping part (21) and the forming part (22); The lower die holder (4) is provided with a stamping station (42), and each sheet metal part (1) sequentially passes through the stamping station (42), wherein the lower die holder (4) is slidably provided with two movable inserts (6), and the two movable inserts (6) are respectively positioned on two opposite sides of the stamping station (42); A guide structure is arranged between the movable insert (6) and the pressing die (3) and is used for forcing the movable insert (6) to move towards the direction close to the forming part (22) when the progressive die is closed, so that the first inner trimming (11) and the third inner trimming (13) can be formed by punching; The stamping die comprises a stamping die (3), a stamping part (21), a second inner receiving edge (12) and a side pushing mechanism (5), wherein the forming part (22) is provided with the side pushing mechanism (5), when the stamping die is clamped, the stamping part (21) forces the side pushing mechanism (5) to move towards a direction away from a moving insert (6), and can stamp and form the second inner receiving edge (12), the side pushing mechanism (5) comprises a reset part, when the stamping die is clamped, the reset part forces the side pushing mechanism (5) to retract into the forming part (22), the guiding structure comprises a guiding column (32) and a guiding groove (61) which is matched with the guiding column, the guiding column (32) is fixed on the bottom surface of the stamping die (3), the guiding groove (61) is formed on the top surface of the moving insert (6), and the guiding column (32) is inclined downwards towards a direction away from a stamping station (42), and when the stamping die is clamped, the guiding column (32) is inserted into the guiding groove (61) and forces the moving insert (6) to move towards a direction close to an adjacent forming part (22). The top surface of the lower die holder (4) is provided with a bearing platform (41), the top surface of the bearing platform (41) forms the stamping station (42), the side surface of the bearing platform (41) close to the movable insert (6) is provided with a second mounting groove (411), the second mounting groove (411) is internally provided with a movable mechanism (7), wherein, The movable mechanism (7) comprises two moving parts (71) which are slidably arranged in a second mounting groove (411), wherein the sliding direction of the moving parts (71) is perpendicular to the sliding direction of the moving insert (6), the two moving parts (71) are arranged at intervals in a normal state, and an inserting structure is arranged between each moving part (71) and the forming part (22); The side of the movable insert (6) is provided with an outer pushing piece (62), the outer pushing piece (62) is opposite to the second mounting groove (411), when the guide post (32) is matched and inserted into the guide groove (61), the outer pushing piece (62) enters between the two movable pieces (71), the two movable pieces (71) are forced to move oppositely, the forming piece (22) is kept vertically positioned through an inserting structure, the lower die holder (4) is provided with a rotating arm group (8), the bottom surface of the pressing die (3) is provided with a force application block (33), when the progressive die is clamped, the force application block (33) is abutted against the rotating arm group (8), and the sheet metal part (1) is forced to bend and deform through the rotating arm group (8), the rotating arm group (8) comprises a connecting shaft rod (81), a first arm plate (82) and a second arm plate (83), the connecting shaft (81) is rotatably arranged at the top of the lower die holder (4), the rotating point of the connecting shaft (81) is positioned at the middle part of the connecting shaft (81), and the rotating point of the connecting shaft (81) is positioned in the same direction as the moving path (6) of the moving shaft (81); the first arm plate (82) is fixed at one end of the connecting rod (81) close to the bearing platform (41), the first arm plate (82) is normally lower than the stamping station (42), the second arm plate (83) is fixed at one end of the connecting rod (81) far away from the bearing platform (41), the second arm plate (83) is normally located at the outer side of the connecting rod (81) far away from a moving path of the moving insert (6), and when progressive die clamping is performed, the force application block (33) abuts against the second arm plate (83) and forces the second arm plate (83) to move downwards, so that the first arm plate (82) moves upwards and forces the sheet metal part (1) to bend upwards.
  2. 2. The progressive die negative angle bending and forming device according to claim 1, wherein the forming piece (22) is provided with a first mounting groove (221) for mounting the side ejection mechanism (5), and the first mounting groove (221) comprises a first area (222) which is formed on the side surface of the forming piece (22) close to the stamping piece (21), a second area (223) which is formed on the side surface of the forming piece (22) far away from the stamping piece (21), and a third area (224) which is communicated between the first area (222) and the second area (223); The side ejection mechanism (5) further comprises a pushing block (51), a connecting rod (52) and a hinged plate (53), wherein the top end of the hinged plate (53) is hinged to the inner wall of the first area (222), and the hinged plate (53) is arranged in a free rotation mode; the pushing block (51) is arranged in the second area (223) in a matching mode, and when the progressive die is separated, the pushing block (51) is completely positioned in the second area (223); The connecting rod (52) is connected with the pushing block (51), the connecting rod (52) is movably arranged in the third area (224), a resisting part (521) is arranged on the periphery side of the connecting rod (52), and the resetting part is arranged between the resisting part (521) and the inner wall of the third area (224) and is used for forcing the connecting rod (52) to normally pass through the first area (222) and abut against the hinge plate (53), so that when the progressive die is separated, the hinge plate (53) rotates to be exposed to the side surface of the formed part (22) away from the adjacent formed part (22).
  3. 3. The progressive die negative angle bending forming device according to claim 2, wherein the reset component is a first spring (54), one end of the first spring (54) is fixed to the resisting part (521), the other end of the first spring is fixed to the inner wall of the third area (224), and the first spring (54) always forces the resisting part (521) to move towards the direction approaching the first area (222).
  4. 4. The progressive die negative angle bending forming device according to claim 1, wherein the width of the forming piece (22) is larger than that of the bearing platform (41), two positioning parts (23) are integrally formed at the bottom of the forming piece (22), and when the progressive die is clamped, the two positioning parts (23) are respectively abutted against two opposite sides of the bearing platform (41); The inserting structure comprises inserting columns (711) and inserting grooves (231) matched with the inserting columns, wherein the inserting columns (711) are fixed on the side surfaces, far away from adjacent moving parts (71), of the moving parts (71), the inserting grooves (231) are formed in positioning parts (23), the inserting columns (711) penetrate through bearing platforms (41) and are opposite to the inserting grooves (231), and when progressive die clamping is performed, the pushing members (62) force the two moving parts (71) to move oppositely, and the inserting columns (711) are matched and inserted into the inserting grooves (231); A nitrogen spring (72) is arranged between each moving member (71) and the inner wall of the second mounting groove (411), and the nitrogen spring (72) is used for forcing the moving member (71) to move towards the direction close to the other moving member (71) and enabling the inserting column (711) to completely retract into the bearing platform (41).
  5. 5. The progressive die negative angle bending forming device according to claim 1, wherein a magnetic structure is arranged between the movable insert (6) and the lower die holder (4), and when the movable insert (6) and the lower die holder (4) are positioned through the magnetic structure, the end part of the guide post (32) far away from the pressing die (3) is opposite to the guide groove (61).
  6. 6. The progressive die negative angle bending and forming device according to claim 1, wherein the side surface of the stamping part (21) is obliquely arranged inwards to form an inclined surface (211), the inclined surface (211) of the stamping part (21) is provided with a sliding groove (212), the side surface of the forming part (22) is provided with a sliding block (225), the sliding block (225) is slidably arranged in the sliding groove (212), and the forming part (22) is always attached to the inclined surface (211).

Description

Progressive die negative angle bending forming device Technical Field The application relates to the field of die design, in particular to a progressive die negative angle bending forming device. Background The progressive die, also called multi-station progressive die, progressive die or jump die, is characterized by that in a pair of dies several equidistant stations are divided, on each station one or several basic stamping processes are set, and the stations are sequentially connected to implement different processing, i.e. a series of different stamping processes can be implemented in one stroke of the punch press. After one stroke is completed, the material is moved forward by the punch feeding mechanism according to a fixed step distance, so that a plurality of working procedures, such as punching, blanking, bending, trimming, deep drawing and the like, can be completed on one pair of dies. The sheet metal product shown in fig. 1 is formed by stamping and bending a sheet metal part 1, wherein one side of the sheet metal product is provided with a first inner edge 11 and a second inner edge 12, namely two negative angles (acute angles), and the other side of the sheet metal product is provided with a third inner edge 13, namely one negative angle. In the prior art, when the sheet metal product is produced, the sheet metal part 1 is required to be punched and bent twice in sequence, one bending station which is additionally arranged can influence the processing efficiency of the whole progressive die, and the sheet metal product is wrapped after being bent and molded, so that the situation of difficult demolding exists, and the sheet metal product has high possibility of deformation during demolding and needs to be improved. Disclosure of Invention Based on the above, the application provides the progressive die negative angle bending forming device, which can complete the stamping and bending processing of sheet metal products at one time and can smoothly complete the demoulding operation. The negative angle bending and forming device of the progressive die adopts the following technical scheme: The negative angle bending and forming device for the progressive die comprises an upper die base, a pressing die and a lower die base, wherein the upper die base is fixedly provided with a stamping part, and two opposite sides of the stamping part are respectively and slidably provided with a forming part; The pressing die is movably arranged at the bottom of the upper die seat, and an elastic piece is arranged between the pressing die and the upper die seat and used for forcing the pressing die to move downwards normally; the lower die holder is provided with a stamping station, and each sheet metal part sequentially passes through the stamping station; A guide structure is arranged between the movable insert and the pressing die and is used for forcing the movable insert to move towards the direction close to the forming part when the progressive die is closed, so that the first inner trimming and the third inner trimming can be formed by punching; One of the molding parts is provided with a side ejection mechanism, when the progressive die is assembled, the stamping part forces the side ejection mechanism to move towards the direction close to the movable insert, and the second inner edge can be formed by stamping, and the side ejection mechanism comprises a reset part which forces the side ejection mechanism to retract into the molding part again when the progressive die is separated. By adopting the technical scheme, the sheet metal part is sequentially conveyed to the stamping station through the stamping machine feeding mechanism for stamping operation, and in the progressive die closing process, the upper die holder and the pressing die move together in the direction close to the lower die holder, and two naturally-sliding formed parts can be abutted against the sheet metal part. And secondly, the pressing die and the movable insert are matched through a guide structure, so that the movable insert can be forced to move towards the direction close to the forming part, and therefore two sides of the sheet metal part are bent upwards to form a first inner trimming and a third inner trimming. Furthermore, the pressing die continuously moves and finally abuts against the top surface of the movable insert, at the moment, the movable insert is kept fixed, and the elastic piece can be extruded in the process that the upper die holder continuously moves downwards, so that the pressing die and the upper die holder relatively move. Finally, the upper die holder continues to move downwards, and the stamping part can force the side ejection mechanism to move towards the direction close to the moving insert, so that the second inner trimming is stamped and formed. Therefore, the sheet metal product can be formed by one-time stamping, and the forming efficiency is high. In addition, when the sheet metal product is s