Die convenient for deflection stamping

Abstract

The utility model relates to a die convenient for deflection stamping, which comprises an upper die holder and a lower die holder, the upper die holder and the lower die holder are in guide connection through a plurality of positioning columns arranged on the side, the lower die holder is provided with an assembly hole, the positioning columns are detachably and tightly matched in the assembly hole, and the positioning columns are arranged on the lower die holder. The upper die base is provided with positioning column holes corresponding to the positioning columns, the side wall of each assembling hole is provided with a slot, one side of each slot is provided with an elastic mechanism, and the elastic mechanisms drive the slots to be tightly closed or opened, so that the positioning columns are locked or loosened by the assembling holes; according to the die, after the upper die base and the lower die base are assembled to a punching machine and are mutually positioned and aligned, the positioning columns on the sides can be detached, after the positioning columns are detached, the space on the left side and the space on the right side of a punching station can be expanded infinitely, the width of a plate is not limited any more, and the small-size punching die can still achieve deflection punching; and the weight of the stamping die and the workshop area occupied by the die are reduced.

Description

Technical Field

[0001] The utility model relates to the field of molds, and specifically to a mold facilitating swing stamping. Background Art

[0002] Sheet metal parts are extremely widely used in various fields, deeply involved in all aspects of the manufacturing industry. Sheet metal forming is mainly achieved through stamping molds. Currently, the structure of stamping molds mainly includes an upper die base and a lower die base 1. When the upper die base and the lower die base are installed on a punching press, positioning columns distributed on at least one side are required for cooperation, so that the upper die base and the lower die base can be positioned and aligned with each other, reducing the impact on the forming of sheet metal parts. In order to improve the assembly accuracy, the positioning columns are often fixed on the lower die base. Therefore, during the stamping process, the positioning columns can only be beside the moving direction of the sheet, and the distance between the positioning columns and the female die limits the width of the sheet. So, the following two situations will occur during the stamping of the punching press:

[0003] Situation 1: In order to reduce the volume of the punching press and even facilitate a single worker to move the stamping mold, the width of the stamping mold can only be reduced. As Figure 1 shown, this situation causes the distance between the female die 2 and the positioning column 3 on the stamping mold to decrease. The width of the distance is only enough for a narrow and long sheet 4 to pass through, so that the stamping mold can only perform single-column stamping on the sheet. This stamping method increases the blank area of the sheet, resulting in waste and low stamping efficiency.

[0004] Situation 2: In order to improve the utilization rate of the sheet and the stamping efficiency, current punching presses, as Figure 2 shown, mainly adopt the swing stamping method, and perform offset stamping by moving the sheet in a zigzag pattern left and right, reducing the blank area of the sheet 4. However, in order to reserve enough swing space on the left and right for the stamping mold during the swinging process of the sheet, the width of the stamping mold can only be increased, so that the distance between the female die 2 and the positioning column 3 can be expanded. But this will cause the width of the stamping mold to increase (the width increases in the same multiple as the width of the sheet), resulting in a significant increase in the volume and weight of the stamping mold, increasing the mold manufacturing cost, assembly and disassembly difficulties, and it is impossible for a single worker to move the stamping mold.

[0005] Therefore, the applicant improves and perfects the stamping mold, and on the basis of combining the above-mentioned existing technologies, provides a new technical solution to solve the above-mentioned multiple defects for consumers to choose and use. Summary of the Invention

[0006] The purpose of the utility model is to solve the above-mentioned existing problems and provide a mold facilitating swing stamping with a simple and reasonable structure.

[0007] A die facilitating yaw stamping, comprising an upper die base and a lower die base. The upper die base and the lower die base are guidingly connected through a plurality of positioning columns arranged on the side. An assembly hole is provided on the lower die base, and the positioning columns are detachably and tightly fitted in the assembly holes. The upper die base is provided with positioning column holes corresponding to the positioning columns. A slit is provided on the side wall of each assembly hole, and a tightening and loosening mechanism is arranged on one side of the slit. The tightening and loosening mechanism drives the slit to close or open, so as to lock or loosen the positioning columns by the assembly holes.

[0008] The object of the present utility model can also be solved by adopting the following technical measures:

[0009] As a more specific solution, the slit divides the lower die base into a fixed main body and a micro-shrinking part. The tightening and loosening mechanism is arranged on the micro-shrinking part and passes through the slit to cooperate with the fixed main body.

[0010] As a further solution, the tightening and loosening mechanism includes a top support assembly and a tensioning assembly arranged on the micro-shrinking part. The top support assembly and the tensioning assembly act on the fixed main body alternatively, so that the micro-shrinking part moves away from or close to the fixed main body.

[0011] As a further solution, the top support assembly includes a top support bolt and a threaded through hole. The threaded through hole is provided on the micro-shrinking part. The top support bolt is adjustably connected in the threaded through hole, and its tail passes through the slit and abuts against the side of the fixed main body corresponding to the slit.

[0012] As a further solution, the tensioning assembly includes a tensioning bolt and a threaded blind hole. The threaded blind hole is provided on the fixed main body. The micro-shrinking part is provided with a through hole corresponding to the threaded blind hole. The tensioning bolt is slidably connected in the through hole, and its tail penetrates through the slit and is threadedly connected with the threaded blind hole.

[0013] As a further solution, the width of the slit is represented as H, and 0.2mm ≤ H ≤ 4mm.

[0014] As a further solution, the lower die base is provided with an adjacent first side wall and a second side wall. The distance between the assembly hole and the first side wall is less than the distance from the second side wall. The slit is provided on the second side wall, and the extending direction of the slit is perpendicular to the width direction of the first side wall.

[0015] As a further solution, the positioning columns are arranged on the left side or / and the right side of the lower die base along the feeding direction of the die. More than two positioning columns are arranged on each side, and more than two positioning columns are symmetrically arranged on the front and rear sides of the lower die base.

[0016] As a further solution, a punch is provided on the lower side of the die of the upper die base, a die cavity that is punch-cut and matched with the punch is provided on the upper side of the lower die base, and a movable pressure plate for pressing the edge of the stamping formed part is provided on the outside of the die cavity.

[0017] As a further solution, a guide sleeve is provided on the lower side of the upper die base corresponding to the positioning post. A positioning post hole is formed in the inner cavity of the guide sleeve, and the positioning post and the guide sleeve form a linear sliding fit.

[0018] The beneficial effects of the present utility model are as follows:

[0019] A mold for facilitating swing stamping according to the present utility model. After the upper die base and the lower die base are assembled to the punching press and positioned and aligned with each other, the positioning posts on the side can be disassembled. After the positioning posts are disassembled, the space on both sides of the stamping station can be infinitely expanded, and the width of the sheet material is no longer limited. This enables a small-sized stamping mold to still achieve swing stamping, improving the production efficiency of stamping, saving materials, reducing waste, and reducing the weight of the stamping mold and the area occupied by the mold in the workshop. It even facilitates a single worker to move the stamping mold. Description of the Drawings

[0020] Figure 1 and Figure 2 is a schematic structural diagram of the background art in the present utility model.

[0021] Figure 3 is a schematic structural diagram of Embodiment 1 in the present utility model.

[0022] Figure 4 is a schematic cross-sectional structural diagram of the mold in the present utility model.

[0023] Figure 5 is a schematic diagram of swing stamping of the mold in the present utility model.

[0024] Figure 6 is a schematic exploded cross-sectional structural diagram of the tightening and loosening mechanism in the present utility model.

[0025] Figure 7 is a schematic exploded structural diagram of the tightening and loosening mechanism in the present utility model.

[0026] Figure 8 and Figure 9 is a schematic structural diagram of Embodiment 2 in the present utility model. Detailed Embodiments

[0027] The present utility model will be further described below with reference to the drawings and embodiments. Embodiment 1:

[0028] As Figures 3 to 7As shown in the figure, a die for facilitating swing stamping includes an upper die base 1 and a lower die base 2. The upper die base 1 and the lower die base 2 are guidingly connected by a plurality of positioning columns 3 arranged on the side. An assembly hole 201 is formed in the lower die base 2, and the positioning column 3 is detachably and tightly fitted in the assembly hole 201. The upper die base 1 is provided with a positioning column hole 101 corresponding to the positioning column 3. A slit 202 is formed in the side wall of each assembly hole 201. A tightening and loosening mechanism 4 is arranged on one side of the slit 202. The tightening and loosening mechanism 4 drives the slit 202 to be closed or opened, so as to lock or loosen the positioning column 3 by the assembly hole 201.

[0029] After this die is assembled to a punching press and the upper die base 1 and the lower die base 2 are positioned and aligned with each other, the positioning columns 3 on the side can be disassembled. After the positioning columns 3 are disassembled, the space on the left and right sides of the stamping station can be infinitely expanded, and the width of the sheet material is no longer limited. This enables a small-sized stamping die to still achieve swing stamping, improving the production efficiency of stamping, saving materials, reducing waste, and reducing the weight of the stamping die and the area occupied by the die in the workshop. It is even convenient for a single worker to move the stamping die.

[0030] In addition, in other embodiments, the positions of the assembly hole 201 and the positioning column hole 101 can be interchanged with each other.

[0031] The slit 202 divides the lower die base 2 into a fixed main body 21 and a micro-shrinking part 22. The tightening and loosening mechanism 4 is arranged on the micro-shrinking part 22 and passes through the slit 202 to cooperate with the fixed main body 21. The lower die base 2 is made of a whole piece of metal material. The micro-shrinking part 22 is separated from the lower die base 2 through the slit 202. When positioning the positioning column 3, the micro-shrinking part 22 can generate a small amount of deformation.

[0032] The tightening and loosening mechanism 4 includes a top support assembly 41 and a tensioning assembly 42 arranged on the micro-shrinking part 22. The top support assembly 41 and the tensioning assembly 42 act on the fixed main body 21 alternately, so that the micro-shrinking part 22 moves away from or approaches the fixed main body 21.

[0033] The top support assembly 41 includes a top support bolt 411 and a threaded through hole 412. The threaded through hole 412 is formed in the micro-shrinking part 22 and is perpendicular to the slit 202. The top support bolt 411 is adjustably connected in the threaded through hole 412, and its tail passes through the slit 202 and abuts against the side surface of the fixed main body 21 corresponding to the slit 202.

[0034] The tensioning assembly 42 includes a tensioning bolt 421 and a threaded blind hole 422. The threaded blind hole 422 is formed in the fixed body 21. The micro-shrinking portion 22 is provided with a through hole 423 corresponding to the threaded blind hole 422. The through hole 423 and the threaded blind hole 422 are perpendicular to the slit 202. The tensioning bolt 421 is slidably connected in the through hole 423, and its tail penetrates through the slit 202 and is threadedly connected to the threaded blind hole 422.

[0035] A sliding hole 43 is further formed outside the threaded through hole 412 and the through hole 423. The head of the top support bolt 411 or the tensioning bolt 421 slides in the sliding hole 43.

[0036] Combined with the above structure, the working principle of the mold is as follows:

[0037] Mold assembly to the punching press: One end of the positioning post 3 is tightly fitted into the assembly hole 201. The tensioning bolt 421 is passed through the through hole 423 and screwed into the threaded blind hole 422. As the tensioning bolt 421 is tightened, the head of the tensioning bolt 421 will pull the micro-shrinking portion 22 closer to the fixed body 21, so that the slit 202 is closely fitted. Correspondingly, the assembly hole 201 will shrink and lock the positioning post 3. After being locked, the positioning post 3 is aligned with the upper die base 1 through the positioning post hole 101.

[0038] Before the mold stamping: The tensioning bolt 421 is loosened or removed. At this time, since the positioning post 3 and the assembly hole 201 are still tightly fitted, the positioning post 3 cannot be removed immediately. At this time, the top support bolt 411 is screwed into the threaded through hole 412. As the top support bolt 411 is screwed inwards, the tail of the top support bolt 411 abuts against the side of the fixed body 21 corresponding to the slit 202, and the micro-shrinking portion 22 will move away from the fixed body 21, so that the slit 202 is expanded. Correspondingly, the assembly hole 201 will open and release the positioning post 3.

[0039] The width of the slit 202 is denoted as H, and 0.2 mm ≤ H ≤ 4 mm; in this embodiment, the width of the slit 202 is preferably between 0.8 mm and 3 mm, and this width does not affect the connection accuracy between the positioning post 3 and the lower die base 2.

[0040] The lower die base 2 is provided with an adjacent first side wall 203 and a second side wall 204. The distance between the assembly hole 201 and the first side wall 203 is less than the distance from the second side wall 204. The slit 202 is formed in the second side wall 204, and the extending direction of the slit 202 is perpendicular to the width direction of the first side wall 203.

[0041] The positioning post 3 is arranged on the left side or / and the right side of the lower die base 2 along the feeding direction of the mold. There are two or more positioning posts 3 on each side, and two or more positioning posts 3 are symmetrically arranged on the front and rear sides of the lower die base 2.

[0042] A punch 5 is provided on the lower side of the upper die base 1, and a die 6 that punches and cooperates with the punch 5 is provided on the upper side of the lower die base 2. An active pressure plate 7 for pressing the edge of the stamping formed part is provided outside the die 6. Before stamping, the active pressure plate 7 is used to fix the sheet material, and the punch 5 and the die 6 are misaligned to punch the formed part from the sheet material.

[0043] A guiding sleeve 8 is provided on the lower side of the upper die base 1 corresponding to the positioning post 3. A positioning post hole 101 is formed in the inner cavity of the guiding sleeve 8, and the positioning post 3 and the guiding sleeve 8 form a linear sliding fit. Adding the guiding sleeve 8 can improve the guiding accuracy. Embodiment Two:

[0044] In Embodiment Two, the difference from Embodiment One is that as Figure 8 and Figure 9 shown, the lower die base 2 includes an independently and separately arranged fixed main body 21 and a micro-shrinking part 22. A semi-circular groove 201a, 201b is formed on each of the opposite surfaces of the fixed main body 21 and the micro-shrinking part 22. When the micro-shrinking part 22 is connected to the fixed main body 21 through the tightening and loosening mechanism 4, the two opposite semi-circular grooves 201a, 201b form an assembly hole 201 and a slit 202.

[0045] In addition, since the fixed main body 21 and the micro-shrinking part 22 adopt a split design, the top support assembly 41 can be omitted in the tightening and loosening mechanism 4. After the tightening component 42 is loosened, the micro-shrinking part 22 automatically detaches from the fixed main body 21, opening the assembly hole 201.

[0046] The above is the preferred solution of the present invention, which shows and describes the basic principle, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A die for eccentric stamping, comprising an upper die base and a lower die base, wherein the upper die base and the lower die base are connected by a plurality of positioning columns arranged on the sides, characterized in that: The lower die base is provided with an assembly hole, and the positioning column is detachably fitted in the assembly hole. The upper die base is provided with a positioning column hole corresponding to the positioning column. A slit is provided on the side wall of each assembly hole, and a tightening mechanism is provided on one side of the slit. The tightening mechanism drives the slit to close or open, so as to lock or loosen the assembly hole on the positioning column.

2. A die for eccentric stamping according to claim 1, characterized in that: The slit separates the lower die seat into a fixed main body and a slightly contracted portion, and the tensioning mechanism is arranged on the slightly contracted portion and passes through the slit to cooperate with the fixed main body.

3. A die for eccentric stamping according to claim 2, characterized in that: The tensioning mechanism comprises a supporting assembly and a tensioning assembly arranged on the micro-contracting portion, and one of the supporting assembly and the tensioning assembly acts on the fixed body to make the micro-contracting portion move away from or approach the fixed body.

4. A die for eccentric stamping according to claim 3, characterized in that: The supporting assembly includes a supporting bolt and a threaded through hole. The threaded through hole is provided on the micro-contracted portion. The supporting bolt is adjustably connected in the threaded through hole, and its tail passes through the slit to support the side surface of the fixed body corresponding to the slit.

5. A die for eccentric stamping according to claim 3, characterized in that: The tensioning assembly includes a tensioning bolt and a threaded blind hole, the threaded blind hole is provided on the fixed body, the micro-contraction portion is provided with a through hole corresponding to the threaded blind hole, the tensioning bolt is slidably connected in the through hole, and the tail portion thereof passes through the slit and is threadedly connected to the threaded blind hole.

6. A die for eccentric stamping according to claim 1, characterized in that: The width of the slit is denoted as H, and 0.2 mm ≤ H ≤ 4 mm.

7. A die for eccentric stamping according to claim 1, characterized in that: The lower mold base is provided with a first side wall and a second side wall adjacent to each other, the distance between the assembly hole and the first side wall is smaller than the distance between the assembly hole and the second side wall, the slit is provided on the second side wall, and the extension direction of the slit is perpendicular to the width direction of the first side wall.

8. A die for eccentric stamping according to claim 1, characterized in that: The positioning columns are arranged on the left side and / or right side of the lower die base along the feeding direction of the mold, and more than two positioning columns are arranged on each side, and more than two positioning columns are symmetrically arranged on the front and rear sides of the lower die base.

9. A die for eccentric stamping according to claim 1, characterized in that: A punch is provided on the lower side of the upper die seat, a die matched with the punch is provided on the upper side of the lower die seat, and a movable pressing plate for pressing the edge of the stamped part is provided on the outer side of the die.

10. A die for eccentric stamping according to claim 1, characterized in that: A guide sleeve is provided on the lower side of the upper die seat corresponding to the positioning column, the inner cavity of the guide sleeve forms a positioning column hole, and the positioning column and the guide sleeve form a linear sliding fit.

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