Progressive die negative angle bending forming device

Abstract

The application provides a progressive die negative angle bending forming device, which comprises an upper die seat, a pressing die and a lower die seat. A stamping part is fixed to the upper die seat, and a forming part is slidably installed on each of the opposite sides of the stamping part. The pressing die is slidably installed on the upper die seat, and an elastic part is arranged between the pressing die and the upper die seat to force the pressing die to move downward in a normal state. The lower die seat is provided with a stamping station, and two movable inserts are slidably installed on the lower die seat and located on the opposite sides of the stamping station. A guide structure is arranged between the movable inserts and the pressing die to force the movable inserts to move towards the forming part when the progressive die is closed, so that the first inner flange and the third inner flange can be stamped and formed. One of the forming parts is provided with a side top mechanism, and when the progressive die is closed, the stamping part forces the side top mechanism to move towards the movable insert, so that the second inner flange can be stamped and formed. Therefore, the stamping and bending processing of the sheet metal product can be completed at one time, and the demolding operation can be smoothly completed.

Description

Technical Field

[0001] This application relates to the field of mold design, and in particular to a progressive die negative angle bending forming device. Background Technology

[0002] Progressive dies, also known as multi-station progressive dies, continuous dies, or skip-step dies, are dies that divide a single die set into several equally spaced stations. Each station houses one or more basic stamping operations, which are sequentially linked to complete different processing steps. In other words, a series of different stamping operations are completed within one stroke of the press. After one stroke, the press's feeding mechanism moves the material forward at a fixed step distance. This allows multiple operations to be completed on a single die set, typically including punching, blanking, bending, trimming, and deep drawing.

[0003] like Figure 1 The sheet metal product shown has a first inner edge 11 and a second inner edge 12 on one side after being stamped and bent by sheet metal part 1, forming two negative angles (acute angles); the other side has a third inner edge 13, forming one negative angle. In the prior art, the production of such sheet metal products usually requires two stamping and bending operations on sheet metal part 1 in sequence. The additional bending station affects the processing efficiency of the entire progressive die. Moreover, since the sheet metal product will wrap around the die after bending, there is difficulty in demolding, and the sheet metal product is likely to deform during demolding. This needs to be improved. Summary of the Invention

[0004] Based on this, this application provides a progressive die negative angle bending forming device, which can complete the stamping and bending process of sheet metal products in one go, and can smoothly complete the demolding operation.

[0005] The progressive die negative angle bending forming device provided in this application adopts the following technical solution:

[0006] A progressive die negative angle bending forming device includes an upper die base, a pressure die and a lower die base. A stamping part is fixed on the upper die base, and forming parts are slidably installed on two opposite sides of the stamping part. When the progressive die is closed, the stamping part and the two forming parts are pressed together against the sheet metal part. When the progressive die is opened, the two forming parts slide down naturally and move closer to each other.

[0007] The die is mounted on the bottom of the upper die base. An elastic element is provided between the die and the upper die base to force the die to move downward normally. The die is provided with a clearance groove for the passage of the stamped part and the formed part.

[0008] The lower die base is equipped with a stamping station, through which each sheet metal part passes in sequence; the lower die base is slidably mounted with two movable inserts, which are located on opposite sides of the stamping station;

[0009] A guide structure is provided between the movable insert and the die to force the movable insert to move toward the part being formed when the progressive die is closed, which can stamp and form the first inner edge and the third inner edge.

[0010] One of the molded parts is equipped with a side-top mechanism. When the progressive die is closed, the stamping part forces the side-top mechanism to move towards the moving insert, which can stamp and form the second inner edge. The side-top mechanism includes a reset component. When the progressive die is opened, the reset component forces the side-top mechanism to retract back into the molded part.

[0011] By adopting the above technical solution, the sheet metal parts of this application are sequentially conveyed to the stamping station via the punching machine feeding mechanism for stamping processing. During the progressive die closing process, the upper die holder and the pressure die move together towards the lower die holder, allowing the two naturally sliding forming parts to first abut against the sheet metal parts. Secondly, through the cooperation of the guiding structure, the pressure die and the movable insert can be forced to move towards the forming parts, thereby bending the two sides of the sheet metal parts upwards to form the first and third inner edges. Furthermore, the pressure die continues to move and finally abuts against the top surface of the movable insert. At this time, the movable insert remains fixed, and the upper die holder continues to move downwards, compressing the elastic element and causing relative movement between the pressure die and the upper die holder. Finally, the upper die holder continues to move downwards, and the stamped parts can force the side-top mechanism to move towards the movable insert, thereby stamping and forming the second inner edge. Therefore, this sheet metal product can be stamped and formed in one pass, resulting in high forming efficiency.

[0012] In addition, during the stamping and progressive die separation of sheet metal products, the upper die holder moves upward first, carrying the stamped part upward. After the stamped part separates from the side top mechanism, the side top mechanism retracts back into the formed part under the reset action of the reset component, which can smoothly avoid the second inner edge of the sheet metal product. Secondly, during the movement of the upper die holder, the two formed parts slide down relative to the stamped part and approach each other, which can smoothly avoid the first and third inner edges of the sheet metal product, thereby allowing the stamped part and the formed part to smoothly separate from the sheet metal product, thus successfully completing the demolding operation and reducing the possibility of deformation during demolding of the sheet metal product.

[0013] Optionally, the molded part is provided with a first mounting groove for mounting the side top mechanism. The first mounting groove includes a first region opened on the side of the molded part near the side of the stamped part, a second region opened on the side of the molded part away from the side of the stamped part, and a third region connecting the first region and the second region.

[0014] The side-top mechanism also includes a push block, a connecting rod, and a hinge plate, wherein the top of the hinge plate is hinged to the inner wall of the first region, and the hinge plate is set to rotate freely.

[0015] The ejector block is installed in the second area, and when the progressive die is separated, the ejector block is completely located inside the second area;

[0016] The connecting rod is connected to the push block and is movably installed in the third region; the outer periphery of the connecting rod is provided with a stop part, and the reset part is located between the stop part and the inner wall of the third region, which is used to force the connecting rod to pass through the first region normally and abut against the hinge plate, so that when the progressive die is separated, the hinge plate rotates to the side exposed on the molded part away from the adjacent molded part.

[0017] By adopting the above technical solution, the connecting rod is normally pressed against the hinge plate by setting the reset component. In its natural state, the bottom end of the hinge plate can be exposed on the side of the molded part facing the adjacent molded part. Then, during the progressive die closing and the stamping part moving downward, the stamping part can press against the hinge plate and force the hinge plate to fully enter the first area. At this time, the hinge plate can push the connecting rod and the push block connected to it to move outward, and smoothly stamp the second inner edge of the sheet metal part.

[0018] Optionally, the reset component is configured as a first spring, with one end of the first spring fixed to the abutment and the other end fixed to the inner wall of the third region; the first spring always forces the abutment to move toward the direction of the first region.

[0019] By adopting the above technical solution, the first spring always generates an elastic force acting on the blocking part, forcing the blocking part to abut against the inner wall of the third region near the first region. This allows the connecting rod to pass through the third region, abut against the hinge plate, and force the hinge plate to move outward, so that the stamping part can smoothly act on the hinge plate when the progressive die is closed, forcing the push block to move outward to form the second inner edge.

[0020] Optionally, the guiding structure includes a guide post and a guide groove that is inserted and adapted to it. The guide post is fixed to the bottom surface of the die, while the guide groove is opened on the top surface of the movable insert. The guide post is inclined downward in a direction away from the stamping station. When the progressive die is closed, the guide post is inserted into the guide groove and forces the movable insert to move towards the adjacent molded part.

[0021] By adopting the above technical solution and setting inclined guide posts, when the progressive die closes and the die moves toward the direction of the moving insert, the guide posts first insert into the guide groove, and under the guidance of the inclined guide posts, the moving insert can be gradually forced to move toward the direction of the molded part, so as to stamp and form the first inner edge and the third inner edge.

[0022] Optionally, the top surface of the lower die base is provided with a support platform, and the top surface of the support platform forms a stamping station; a second mounting groove is provided on the side of the support platform near the movable insert, and a movable mechanism is installed in the second mounting groove; wherein,

[0023] The moving mechanism includes two movable parts that are slidably installed in the second mounting groove. The sliding direction of the movable parts is the same as the sliding direction of the movable insert. The two movable parts are normally spaced apart, and each movable part is provided with a mating structure with the molded part.

[0024] The movable insert has an outward pusher on its side, which is positioned opposite the second mounting groove. When the guide post is inserted into the guide groove, the outward pusher moves between the two movable parts, forcing them to move in opposite directions and keeping the molded part vertically positioned through the interlocking structure.

[0025] By adopting the above technical solution, when the progressive die is closed, the formed part moves downward and first abuts against the sheet metal part. At this time, the guide post of the die inserts into the guide groove of the moving insert, forcing the moving insert to move towards the adjacent formed part. This allows the pusher to enter between the two moving parts, forcing the two moving parts to move in opposite directions. Through the interlocking structure between the moving part and the formed part, the vertical positioning of the formed part can be achieved. This reduces the possibility of the formed part shifting upward under force when the moving insert moves towards the adjacent formed part and bends the sheet metal part. It also maintains the sheet metal part clamped and positioned together between the formed part and the support, ensuring that the stamped sheet metal product has good forming quality.

[0026] Optionally, the width of the molded part is greater than the width of the base, and the bottom of the molded part has two positioning parts integrally formed. When the progressive die is closed, the two positioning parts abut against the two opposite sides of the base.

[0027] The insertion structure includes an insertion post and a matching insertion slot. The insertion post is fixed to the side of the moving part away from the adjacent moving part, and the insertion slot is opened in the positioning part. The insertion post passes through the support and is set opposite to the insertion slot. When the progressive die is closed, the pusher forces the two moving parts to move in opposite directions and makes the insertion post match and insert into the insertion slot.

[0028] Each moving part is provided with a nitrogen spring between itself and the inner wall of the second mounting slot. The nitrogen spring is used to force the moving part to move closer to another moving part and to make the plug post retract completely into the base.

[0029] By adopting the above technical solution, and by setting a nitrogen spring to continuously generate elastic force acting on the moving parts, the insert post can be normally retracted into the base, thus allowing the positioning part to smoothly abut against the two opposite sides of the base when the progressive die is closed, and the molded part to smoothly abut against the sheet metal part on the base. When the die forces the moving insert to move closer to the adjacent molded part, the pusher enters between the two moving parts, forcing the two moving parts to move in opposite directions. The insert post can then protrude from the base and match the insertion slot of the positioning part, thereby successfully achieving the vertical positioning of the molded part.

[0030] Optionally, the lower mold base is equipped with a rotating arm assembly, and the bottom surface of the die is provided with a force-applying block. When the progressive die is closed, the force-applying block abuts against the rotating arm assembly, and the rotating arm assembly forces the sheet metal part to bend upwards.

[0031] By adopting the above technical solution, when the progressive die is closed, the force-applying block of the pressure die moves downward and abuts against a local position of the rotating arm plate, which can force the sheet metal part to bend upward and form a pre-bent position; then the moving insert moves towards the adjacent forming part under the drive of the guide structure, which can further stamp and bend the sheet metal part to successfully form the first inner edge and the third inner edge.

[0032] Optionally, the rotating arm assembly includes a coupling rod, a first arm plate, and a second arm plate. The coupling rod is rotatably mounted on the top of the lower mold base. The rotation point of the coupling rod is located in the middle of the coupling rod, and the coupling rod is located outside the moving path of the moving insert. The axial direction of the coupling rod is the same as the moving direction of the moving insert.

[0033] The first arm plate is fixed to the end of the coupling rod near the bearing platform, and the first arm plate is normally lower than the stamping station; the second arm plate is fixed to the end of the coupling rod away from the bearing platform, and the second arm plate is normally located outside the moving path of the coupling rod away from the moving insert. When the progressive die closes, the force block abuts against the second arm plate and forces the second arm plate to move downward, thereby causing the first arm plate to move upward and forcing the sheet metal part to bend upward.

[0034] By adopting the above technical solution, when the progressive die closes, the guide post inserts into the guide groove, forcing the moving insert to move closer to the adjacent molded part. After the molded part is positioned through the interlocking structure, the force-applying block of the die abuts against the first arm plate and forces the first arm plate to rotate downwards. This can drive the second arm plate to rotate upwards via the coupling rod. The second arm plate is normally lower than the stamping station and is located below the sheet metal part. When the second arm plate is subjected to force and rotates upwards, it can abut against the sheet metal part and force the sheet metal part to bend upwards, thus smoothly forming the pre-bent position. Moreover, by controlling the angle between the first arm plate and the second arm plate, after the force-applying block abuts against the first arm plate, the second arm plate can be forced to be completely outside the moving path of the moving insert, so that the subsequent moving insert can smoothly stamp the sheet metal part.

[0035] Optionally, a magnetic attraction structure is provided between the movable insert and the lower mold base. When the movable insert and the lower mold base are positioned by the magnetic attraction structure, the end of the guide post away from the mold is directly opposite the guide groove.

[0036] By adopting the above technical solution, after the progressive die is separated, the movable insert can be positioned under the magnetic attraction of the magnetic structure, so that the guide groove is kept in the position directly opposite the end of the guide post, so that the guide post can smoothly enter the guide groove when the progressive die is closed next time, forcing the movable insert to move towards the adjacent molded part.

[0037] Optionally, the side of the stamped part is inclined inward to form an inclined surface, and the inclined surface of the stamped part is provided with a sliding groove; the side of the formed part is provided with a sliding block, the sliding block is slidably installed in the sliding groove, and the formed part is always in contact with the inclined surface.

[0038] By adopting the above technical solution, the cooperation between the sliding block and the sliding groove allows the molded part to be slidably installed on the inclined surface of the stamping part. Moreover, when the sliding block slides naturally in the sliding groove, the molded part can always be in contact with the inclined surface, so that the two molded parts can move closer to each other when they slide down, so as to facilitate the smooth demolding of the sheet metal part.

[0039] In summary, this application includes at least one of the following beneficial technical effects:

[0040] 1. By setting movable inserts for stamping the first inner edge and the third inner edge, and setting a side top mechanism for stamping the second inner edge, the stamping and bending process of the sheet metal product can be completed in one go, improving the forming efficiency of the sheet metal product, and at the same time, the demolding operation of the sheet metal product can be completed smoothly.

[0041] 2. By setting two moving parts in the second mounting slot, when the moving insert moves towards the adjacent molded part and forces the two moving parts to move away from each other, the vertical positioning of the molded part can be achieved through the interlocking structure between the moving parts and the molded part, and the molded part and the support are clamped together to position the sheet metal part, so as to ensure that the stamped sheet metal product has good forming quality.

[0042] 3. By setting up a rotating arm assembly, the die moves downward and the force block abuts against the first arm plate of the rotating arm assembly, which can drive the second arm plate to abut against the sheet metal part and force the sheet metal part to bend upward, thereby smoothly forming a pre-bending position, so as to facilitate the moving insert to stamp and bend the sheet metal part, and smoothly form the first inner edge and the third inner edge. Attached Figure Description

[0043] Figure 1 This is a structural schematic diagram of the sheet metal products produced in the background technology;

[0044] Figure 2 This is a schematic diagram of the progressive die parting process in this embodiment;

[0045] Figure 3 This is a schematic diagram of the progressive die closing mechanism in this embodiment;

[0046] Figure 4 yes Figure 2 Enlarged view of point A in the middle;

[0047] Figure 5 yes Figure 3 Enlarged view of point B in the middle;

[0048] Figure 6 This is a partial structural diagram of the stamping station in this embodiment, mainly showing the specific structure of the formed part, the movable insert and the support platform;

[0049] Figure 7 This is a partial sectional view of the support platform in this embodiment, mainly showing the structure of the movable mechanism;

[0050] Figure 8 yes Figure 6 A magnified view of point C in the middle.

[0051] Explanation of reference numerals in the attached drawings: 1. Sheet metal part; 11. First inner edge; 12. Second inner edge; 13. Third inner edge; 2. Upper mold base; 21. Stamped part; 211. Inclined surface; 212. Sliding groove; 22. Formed part; 221. First mounting groove; 222. First area; 223. Second area; 224. Third area; 225. Sliding block; 23. Positioning part; 231. Insertion groove; 24. Movable insertion hole;

[0052] 3. Press mold; 31. Relief groove; 32. Guide post; 33. Force application block; 34. Movable insert post; 35. Second spring; 4. Lower mold base; 41. Support platform; 411. Second mounting groove; 412. Third mounting groove; 42. Stamping station; 43. Second magnet; 44. Fixed base;

[0053] 5. Side-top mechanism; 51. Push block; 52. Connecting rod; 521. Blocking part; 53. Hinge plate; 54. First spring; 6. Moving insert; 61. Guide groove; 62. Outward pusher; 63. First magnet; 64. Slide rail slider; 7. Movable mechanism; 71. Moving part; 711. Insertion post; 72. Nitrogen spring; 8. Rotating arm assembly; 81. Coupling rod; 82. First arm plate; 83. Second arm plate. Detailed Implementation

[0054] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0055] This application discloses a progressive die negative angle bending forming device.

[0056] Reference Figure 2A progressive die negative angle bending forming device includes an upper die base 2, a pressure die 3, and a lower die base 4. A stamping part 21 is fixed on the bottom surface of the upper die base 2. Two sides of the stamping part 21 are inclined inward to form inclined surfaces 211. The two inclined surfaces 211 are located on two opposite sides of the stamping part 21. In addition, forming parts 22 are provided on the two opposite sides of the stamping part 21. One side of the forming part 22 is provided with an integrally formed sliding block 225. The inclined surface 211 of the stamping part 21 has an inward sliding groove 212. Both the sliding block 225 and the sliding groove 212 are dovetail shaped. By sliding the sliding block 225 onto the sliding groove 212, the forming part 22 can be slidably mounted on the stamping part 21. The forming part 22 can always move in contact with the inclined surface 211.

[0057] It should be noted that while the molded parts 22 slide down naturally under gravity, the two molded parts 22 can approach each other along the inclined surface 211; during the progressive die parting, the sliding block 225 slides down naturally and abuts against the lower end wall of the sliding groove 212, and the molded parts 22 can be partially located below the stamped part 21; at the same time, refer to Figure 3 When the progressive die closes, the forming part 22 moves upward relative to the stamping part 21, and the two stamping parts 21 can move away from each other along the inclined surface 211. Finally, the stamping part 21 and the two forming parts 22 abut against the sheet metal part 1. At this time, the sliding block 225 abuts against the upper wall of the sliding groove 212, which can stably stamp and position the sheet metal part 1.

[0058] Back Figure 2 The side of the formed part 22 away from the stamping part 21 is also inclined, which is used to form the first inner edge 11 and the third inner edge 13 after the sheet metal part 1 is stamped. One of the formed parts 22 is provided with a first mounting groove 221, and a side top mechanism 5 is installed inside the first mounting groove 221; the side top mechanism 5 is used to stamp the sheet metal part 1 when the progressive die is closed to form the second inner edge 12.

[0059] Specific reference Figure 4 The first mounting groove 221 includes a first region 222 formed on the side of the molded part 22 near the stamped part 21, a second region 223 formed on the side of the molded part 22 away from the stamped part 21, and a third region 224 connecting the first region 222 and the second region 223. The side top mechanism 5 includes a push block 51, a connecting rod 52, and a hinge plate 53. The top end of the hinge plate 53 is hinged to the inner wall of the first region 222, and the hinge plate 53 is freely rotatable.

[0060] The push block 51 is fitted into the second region 223, and the shape of the push block 51 is the same as that of the second region 223. The end of the connecting rod 52 is connected to the push block 51, and the connecting rod 52 is movably installed in the third region 224. The outer periphery of the connecting rod 52 is integrally formed with a stop portion 521, and the outer diameter of the stop portion 521 is larger than the outer diameter of the connecting rod 52. Furthermore, a reset component is provided between the stop portion 521 and the inner wall of the third region 224. In this embodiment, the reset component is a first spring 54. The first spring 54 is sleeved on the connecting rod 52, one end of the first spring 54 abuts against the stop portion 521, and the other end of the first spring 54 abuts against the inner wall of the third region 224. The first spring 54 can always generate an elastic force acting on the stop portion 521, so that the stop portion 521 abuts against the inner wall of the third region 224 near the stamping part 21. At this time, the push block 51 can be completely located inside the first region 222.

[0061] The axial length of the connecting rod 52 is greater than the axial length of the third region 224, allowing the connecting rod 52 to partially extend into the first region 222 and expose itself on the side of the molded part 22 away from the stamping part 21. This forces the hinge plate 53 to rotate to the side of the molded part 22 away from the stamping part 21. (See also...) Figure 5 When the progressive die closes and the stamping part 21 moves downward, the stamping part 21 can force the hinge plate 53 to rotate inward. Finally, the hinge plate 53 completely enters the first region 222, which can push the connecting rod 52 and the push block 51 to move away from the stamping part 21. Finally, the push block 51 can be exposed outside the forming part 22 for stamping the sheet metal part 1 to form the second inner edge 12.

[0062] It should be noted that when the stamping is completed and the progressive die is separated, the stamped part 21 moves upward away from the outside of the hinge plate 53. Under the elastic force of the first spring 54, the blocking part 521 returns to the position of abutting against the inner wall of the third region 224. At this time, the push block 51 returns to the second region 223, and the hinge plate 53 can rotate again to the position exposed on the molded part 22 under the action of the connecting rod 52, so as to facilitate the next progressive die closing stamping operation.

[0063] Back Figure 2The mold 3 has multiple movable pins 34 fixed on its side, and the upper mold base 2 has multiple movable holes 24. By inserting the movable pins 34 into the movable holes 24, the mold 3 can be movably installed on the upper mold base 2, and the mold 3 is located below the upper mold base 2. An elastic element is also provided between the mold 3 and the upper mold base 2. The elastic element includes multiple second springs 35. Each second spring 35 is respectively sleeved on each movable pin 34. One end of the second spring 35 abuts against the upper mold base 2, and the other end of the second spring 35 abuts against the mold 3. The second spring 35 can always generate an elastic force acting on the mold 3, so that the mold 3 moves downward normally. In addition, the top surface of the mold 3 is also provided with a through clearance groove 31, which is used for the stamping part 21 and the two forming parts 22 to pass through.

[0064] The top surface of the lower die base 4 is provided with an integrally formed support platform 41, and the top surface of the support platform 41 forms a stamping station 42. Each sheet metal part 1 can be conveyed to the stamping station 42 one by one through the punch press feeding mechanism. The top surface of the lower die base 4 is provided with two movable inserts 6. The movable inserts 6 are slidably installed on the top surface of the lower die base 4 through the cooperation of the slide rail slider 64, and the two movable inserts 6 are located on two opposite sides of the support platform 41. Each movable insert 6 is provided with a guide structure between itself and the die 3. Through the guide structure, the movable insert 6 can be forced to move towards the forming part 22 when the progressive die is closed. The first inner edge 11 and the third inner edge 13 are stamped through the cooperation between the movable insert 6 and the forming part 22, and the second inner edge 12 is stamped through the cooperation between the movable insert 6 and the push block 51.

[0065] Specifically, the guiding structure includes a guide post 32 and a guide groove 61 that is inserted and adapted to it. The guide post 32 is fixed to the bottom surface of the die 3 and is inclined downwards in a direction away from the stamping station 42. The guide groove 61 is formed on the top surface of the movable insert 6 and is also inclined downwards in a direction away from the stamping station 42. (See also...) Figure 3 When the progressive die is closed, after the guide post 32 is inserted into the guide groove 61, the die 3 continues to move downward, which enables the guide post 32 to drive the movable insert 6 to move closer to the molded part 22; while when the progressive die is opened, the die 3 moves upward, which enables the guide post 32 to drive the movable insert 6 to move away from the molded part 22.

[0066] In addition, a magnetic attraction structure is provided between the movable insert 6 and the lower die base 4. The magnetic attraction structure includes a first magnet 63 embedded on the lower surface of the movable insert 6 and a second magnet 43 embedded on the upper surface of the lower die base 4. The magnetic poles of the first magnet 63 and the second magnet 43 are opposite. When the progressive die is separated and the guide post 32 is disengaged from the guide groove 61, the first magnet 63 and the second magnet 43 are in a position facing each other. They can generate a magnetic attraction force between them, thereby maintaining the position of the movable insert 6, that is, keeping the end of the guide post 32 away from the die 3 facing the guide groove 61, so as to facilitate the next progressive die closing and stamping operation.

[0067] Additionally, refer to Figure 6 In this embodiment, the width of the molded part 22 is greater than the width of the support 41. The bottom of the molded part 22 is integrally formed with two positioning parts 23. The two positioning parts 23 are spaced apart and located on two opposite sides of the molded part 22. When the progressive die is closed, the two positioning parts 23 can abut against the two opposite sides of the support 41 respectively.

[0068] Reference Figure 7 The support 41 has a second mounting groove 411 on its side near the movable insert 6. Each side of the support 41 near the positioning part 23 has multiple third mounting grooves 412, each of which communicates with the second mounting groove 411. A movable mechanism 7 is installed within the second mounting groove 411. Specifically, the movable mechanism 7 includes two moving parts 71. The sliding direction of the moving parts 71 is perpendicular to the sliding direction of the movable insert 6, and the two moving parts 71 are normally spaced apart. (See also...) Figure 8 The side of the movable insert 6 is provided with an integrally formed pusher 62. The pusher 62 is positioned directly opposite the second mounting groove 411. When the movable insert 6 moves closer to the adjacent molded part 22 under the drive of the guide structure, the pusher 62 can enter the second mounting groove 411 and be located in the area between the two movable parts 71, thereby forcing the two movable parts 71 to move away from each other during the movement of the movable insert 6.

[0069] Back Figure 7 Each moving part 71 is provided with a mating structure between itself and the adjacent positioning part 23, which is used to vertically position the molded part 22 after the moving insert 6 moves closer to the adjacent molded part 22; at the same time, refer to Figure 6 The insertion structure includes a plug-in post 711 and a matching plug-in groove 231. The plug-in post 711 is fixed to the side of the movable member 71 away from the adjacent movable member 71, while the plug-in groove 231 is opened on the side of the positioning part 23 near the support 41. There are multiple plug-in posts 711, and each plug-in post 711 is inserted into each third mounting groove 412.

[0070] Each movable component 71 is provided with a nitrogen spring 72 between itself and the inner wall of the second mounting groove 411. The nitrogen spring 72 forces the movable component 71 to move closer to the other movable component 71, so that the insertion post 711 is completely retracted into the third mounting groove 412 under normal conditions. When the pusher 62 enters between the two movable components 71 and forces the two movable components 71 to move in opposite directions, the insertion post 711 can be exposed in the third mounting groove 412 and inserted into the insertion groove 231 to achieve vertical positioning of the formed part 22, which facilitates the smooth stamping and forming of the sheet metal part 1.

[0071] Additionally, returning Figure 8 The top surface of the lower mold base 4 is also equipped with a fixed base 44, and the fixed base 44 is equipped with a rotating arm assembly 8. The rotating arm assembly 8 includes a coupling rod 81, a first arm plate 82 and a second arm plate 83. The coupling rod 81 is rotatably connected to the fixed base 44, and the axis of the coupling rod 81 is set in the same direction as the moving direction of the moving insert 6. The coupling rod 81 is located outside the moving path of the moving insert 6, and can avoid the coupling rod 81 when the moving insert 6 moves towards the molding part 22.

[0072] The rotational connection point between the coupling 81 and the fixed seat 44 is located in the middle of the coupling 81. The first arm plate 82 is fixed to the end of the coupling 81 near the bearing 41, and the first arm plate 82 is normally lower than the stamping station 42, so that when the sheet metal part 1 is conveyed to the stamping station 42, the first arm plate 82 can be located below the sheet metal part. The second arm plate 83 is fixed to the end of the coupling 81 away from the bearing 41, and the second arm plate 83 is normally located on the outside of the moving path of the coupling 81 away from the moving insert 6. (See also...) Figure 2 The bottom surface of the die 3 is fixed with a force-applying block 33 for abutting against the second arm plate 83. When the progressive die is closed, the force-applying block 33 can abut against the second arm plate 83 and force the second arm plate 83 to move downward. At this time, through the lever principle, the first arm plate 82 can move upward and force the sheet metal part 1 to bend upward, thereby making the sheet metal part 1 form a pre-bent position so that when the moving insert 6 moves close to the adjacent forming part 22, it can smoothly squeeze the sheet metal part 1 and form the sheet metal product.

[0073] Additionally, it should be noted that the first arm plate 82 in this embodiment is equipped with a counterweight, making the weight of the first arm plate 82 greater than the weight of the second arm plate 83. This allows the first arm plate 82 to naturally rotate to a position lower than the stamping station 42 under the influence of gravity. Furthermore, the second arm plate 83 is normally in an upward tilted state. After the force-applying block 33 abuts against the second arm plate 83, the second arm plate 83 is forced to move to a downward tilted state with a large rotation range. This allows the first arm plate 82 to rotate to the outside of the moving insert 6's movement path after the progressive die is closed, facilitating the subsequent stamping of the sheet metal part 1 by the moving insert 6.

[0074] The implementation principle of the progressive die negative angle bending forming device in this application embodiment is as follows:

[0075] After the punching feeding mechanism transmits the sheet metal part 1 to the stamping station 42 above the support 41, it controls the progressive die to close. First, the upper die base 2 and the pressure die 3 can move together towards the lower die base 4. The two naturally sliding forming parts 22 can first abut against the sheet metal part 1, and the two positioning parts 23 on the forming parts 22 can abut against the two opposite sides of the support 41 respectively.

[0076] Secondly, the guide post 32 at the bottom of the mold 3 enters the guide groove 61 of the movable insert 6. With the cooperation of the guide structure, the movable insert 6 can move towards the adjacent molded part 22, so that the pusher 62 of the movable insert 6 enters the second mounting groove 411. At this time, the pusher 62 can enter between the two movable parts 71, forcing the two movable parts 71 to move in opposite directions, thereby making each plug post 711 match the plug groove 231 of the adjacent positioning part 23 on the outside, and realizing the vertical positioning of the molded part 22.

[0077] Furthermore, as the die 3 continues to move closer to the lower die base 4, the force block 33 can abut against the second arm plate 83 and force the second arm plate 83 to move downward, thereby using the lever principle to force the first arm plate 82 to move upward. The first arm plate 82 can abut against the sheet metal part 1 to cause it to bend upward and form a pre-bending position.

[0078] Then, the die 3 continues to move closer to the lower die base 4, and the movable insert 6 can abut against the pre-bent position. Finally, the die 3 abuts against the top surface of the movable insert 6, so that the movable insert 6 remains fixed. As the upper die base 2 continues to move downward, it can squeeze the elastic element, so that the die 3 and the upper die base 2 move relative to each other.

[0079] Furthermore, the upper mold base 2 continues to move downward, the stamping part 21 abuts against the hinge plate 53 and forces the hinge plate 53 to fully enter the first region 222. At this time, the hinge plate 53 can push the connecting rod 52 to move outward, so that the push block 51 moves outward to stamp the sheet metal part 1.

[0080] Finally, the upper mold base 2 continues to move downward, and the two forming parts 22 move away from each other along the inclined surface 211 of the stamping part 21. Eventually, the stamping part 21 and the two forming parts 22 can press together against the sheet metal part 1, and the two forming parts 22 press against the adjacent movable inserts 6 on the outside respectively, thus stamping the sheet metal product in one go with high forming efficiency.

[0081] In addition, after the sheet metal product is stamped and formed and the progressive die is separated, the upper die holder 2 moves upward first, carrying the stamped part 21 upward. After the stamped part 21 is separated from the hinge plate 53, under the reset action of the first spring 54, the push block 51 retracts back into the molded part 22, which can smoothly avoid the second inner edge 12 of the sheet metal product. Secondly, during the movement of the upper die holder 2, the two molded parts 22 slide down relative to the stamped part 21 and approach each other, which can smoothly avoid the first inner edge 11 and the third inner edge 13 of the sheet metal product, thereby allowing the stamped part 21 and the molded part 22 to smoothly detach from the sheet metal product, thus successfully completing the demolding operation.

[0082] The above are preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made to the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A progressive die negative angle bending forming device, characterized in that: The progressive die includes an upper die base (2), a pressure die (3), and a lower die base (4). The upper die base (2) is fixed with a stamping part (21), and two forming parts (22) are slidably installed on the two opposite sides of the stamping part (21). When the progressive die is closed, the stamping part (21) and the two forming parts (22) are pressed together against the sheet metal part (1). When the progressive die is opened, the two forming parts (22) slide down naturally and move closer to each other. The die (3) is movably mounted on the bottom of the upper die base (2). An elastic element is provided between the die (3) and the upper die base (2) to force the die (3) to move downward normally. The die (3) is provided with a relief groove (31) for the stamping part (21) and the forming part (22) to pass through. The lower die base (4) is provided with a stamping station (42), and each sheet metal part (1) passes through the stamping station (42) in sequence; the lower die base (4) is slidably installed with two movable inserts (6), and the two movable inserts (6) are respectively located on two opposite sides of the stamping station (42); A guide structure is provided between the movable insert (6) and the die (3) to force the movable insert (6) to move toward the forming part (22) when the progressive die is closed, and to stamp the first inner edge (11) and the third inner edge (13). One of the molded parts (22) is equipped with a side-top mechanism (5). When the progressive die is closed, the stamping part (21) forces the side-top mechanism (5) to move towards the moving insert (6), which can stamp and form a second inner edge (12). The side-top mechanism (5) includes a reset component. When the progressive die is opened, the reset component forces the side-top mechanism (5) to retract back into the molded part (22). The guide structure includes a guide post (32) and a guide groove (61) that is inserted into it. The guide post (32) is fixed to the bottom surface of the die (3), while the guide groove (61) is opened on the top surface of the moving insert (6). The guide post (32) is inclined downward away from the stamping station (42). When the progressive die is closed, the guide post (32) is inserted into the guide groove (61) and forces the moving insert (6) to move towards the adjacent molded part (22). The top surface of the lower die base (4) is provided with a support platform (41), and the top surface of the support platform (41) forms the stamping station (42); the side of the support platform (41) near the movable insert (6) is provided with a second mounting groove (411), and a movable mechanism (7) is installed in the second mounting groove (411); wherein, The active mechanism (7) includes two movable parts (71) that are slidably installed in the second mounting groove (411). The sliding direction of the movable parts (71) is perpendicular to the sliding direction of the movable insert (6). The two movable parts (71) are normally spaced apart, and each movable part (71) is provided with a mating structure with the molded part (22). The movable insert (6) has an outward pusher (62) on its side. The outward pusher (62) is positioned opposite the second mounting groove (411). When the guide post (32) is inserted into the guide groove (61), the outward pusher (62) enters between the two movable parts (71), forcing the two movable parts (71) to move in opposite directions, and keeping the molded part (22) vertically positioned through the interlocking structure. The lower mold base (4) is equipped with a rotating arm assembly (8), and the bottom surface of the pressure mold (3) is provided with a force-applying block (33). When the progressive mold is closed, the... The force-applying block (33) abuts against the rotating arm assembly (8), and the rotating arm assembly (8) forces the sheet metal part (1) to bend upwards; the rotating arm assembly (8) includes a coupling rod (81), a first arm plate (82), and a second arm plate (83). The coupling rod (81) is rotatably mounted on the top of the lower mold base (4). The rotation point of the coupling rod (81) is located in the middle of the coupling rod (81), and the coupling rod (81) is located outside the moving path of the moving insert (6); the axial direction of the coupling rod (81) is the same as the moving direction of the moving insert (6). The first arm plate (82) is fixed to the end of the coupling rod (81) near the bearing platform (41), and the first arm plate (82) is normally lower than the stamping station (42); the second arm plate (83) is fixed to the end of the coupling rod (81) away from the bearing platform (41), and the second arm plate (83) is normally located outside the moving path of the coupling rod (81) away from the moving insert (6). When the progressive die is closed, the force block (33) abuts against the second arm plate (83) and forces the second arm plate (83) to move downward, thereby causing the first arm plate (82) to move upward and forcing the sheet metal part (1) to bend upward.

2. The progressive die negative angle bending forming device according to claim 1, characterized in that: The molded part (22) is provided with a first mounting groove (221) for mounting the side top mechanism (5). The first mounting groove (221) includes a first region (222) opened on the side of the molded part (22) near the stamping part (21), a second region (223) opened on the side of the molded part (22) away from the stamping part (21), and a third region (224) connecting the first region (222) and the second region (223). The side-top mechanism (5) also includes a push block (51), a connecting rod (52) and a hinge plate (53), wherein the top of the hinge plate (53) is hinged to the inner wall of the first region (222), and the hinge plate (53) is freely rotatable. The push block (51) is matched and installed in the second region (223). When the progressive die is split, the push block (51) is completely located inside the second region (223). The connecting rod (52) is connected to the push block (51), and the connecting rod (52) is movably installed in the third region (224); the outer periphery of the connecting rod (52) is provided with a stop (521), and the reset component is provided between the stop (521) and the inner wall of the third region (224) to force the connecting rod (52) to pass through the first region (222) normally and abut against the hinge plate (53), so that when the progressive die is separated, the hinge plate (53) rotates to the side exposed on the molded part (22) away from the adjacent molded part (22).

3. The progressive die negative angle bending forming device according to claim 2, characterized in that: The reset component is a first spring (54), one end of which is fixed to the stop part (521) and the other end is fixed to the inner wall of the third region (224); the first spring (54) always forces the stop part (521) to move closer to the first region (222).

4. The progressive die negative angle bending forming device according to claim 1, characterized in that: The width of the molded part (22) is greater than the width of the support (41). The bottom of the molded part (22) has two positioning parts (23) integrally formed. When the progressive die is closed, the two positioning parts (23) abut against the two opposite sides of the support (41). The mating structure includes a plug-in post (711) and a mating plug-in slot (231). The plug-in post (711) is fixed to the side of the moving part (71) away from the adjacent moving part (71). The plug-in slot (231) is opened in the positioning part (23). The plug-in post (711) passes through the support platform (41) and is arranged opposite to the plug-in slot (231). When the progressive die is closed, the pusher (62) forces the two moving parts (71) to move in opposite directions and makes the plug-in post (711) match and insert into the plug-in slot (231). Each of the movable parts (71) is provided with a nitrogen spring (72) between it and the inner wall of the second mounting groove (411). The nitrogen spring (72) is used to force the movable part (71) to move closer to the other movable part (71) and to make the plug post (711) completely retract into the base (41).

5. The progressive die negative angle bending forming device according to claim 1, characterized in that: A magnetic attraction structure is provided between the movable insert (6) and the lower mold base (4). When the movable insert (6) and the lower mold base (4) are positioned by the magnetic attraction structure, the end of the guide post (32) away from the pressure mold (3) is directly opposite the guide groove (61).

6. The progressive die negative angle bending forming device according to claim 1, characterized in that: The side of the stamped part (21) is inclined inward to form an inclined surface (211), and the inclined surface (211) of the stamped part (21) is provided with a sliding groove (212); the side of the molded part (22) is provided with a sliding block (225), the sliding block (225) is slidably installed in the sliding groove (212), and the molded part (22) is always in contact with the inclined surface (211).

Images