Die structure for small-range double-sided thickening of edge of thick material product

Abstract

The utility model belongs to the technical field of dies, and discloses a die structure for small-range double-sided thickening of the edge of a thick-material product, which is a progressive die and comprises an upper die and a lower die, and further comprises a blank body thickening assembly, a profiling thickening assembly and a profiling precise cutting assembly which are sequentially arranged, a product material belt is extruded by the blank body thickening assembly to form a bottom-thickened blank body, and the bottom-thickened blank body is extruded by the profiling precise cutting assembly. The bottom-thickened blank body is extruded by the profiling thickening assembly to form a double-face-thickened body, and the double-face-thickened body is accurately cut by the profiling accurate cutting assembly to form a product with double faces thickened in a small edge range. The die structure solves the problems of complex process, low production efficiency and high and serious production cost caused by double-sided thickening of a product, optimizes the product process flow, improves the production efficiency, reduces the production cost, and has direct economic benefits.

Description

A mold structure for double-sided thickening of the edges of thick materials. Technical Field

[0001] This utility model belongs to the field of mold technology, specifically relating to a mold structure for thickening the edges of thick materials on both sides in a small area. Background Technology

[0002] Stamping is one of the methods of metal plastic forming, possessing advantages such as high quality, high efficiency, energy saving, material saving, and low cost. It is widely used in many sectors of the national economy, including machinery, automobiles, electronics, and home appliances, becoming an important and irreplaceable means of material forming. A blanking die is a mold used to separate material from strips, sheets, or semi-finished products along a specified contour. According to the nature of the process, blanking dies can be divided into blanking dies, punching dies, trimming dies, and cutting dies, etc. According to the degree of process combination, they can be roughly classified into engineering dies, progressive dies, and transfer dies.

[0003] Progressive dies (also known as continuous dies or step dies) are stamping dies that allow a press to complete multiple processes simultaneously at several different positions in one stroke. Because they can complete multiple processes such as trimming, notching, grooving, punching, plastic deformation, and blanking on a single die, they are a type of stamping die with multiple stations and high efficiency.

[0004] Engineering mold (single-operation mold) presses are molds that complete only one operation in one stamping stroke. They are single-station, single-operation molds. The mold structure is simple, but it requires manual or robotic arm assistance, so the production efficiency is relatively low and the cumulative error of the stamped parts is relatively large. They are mainly used for the production of workpieces with small batches and low precision requirements.

[0005] Currently, for various products that require double-sided thickening, most of them use engineering molds, NC machining, or welding processes in their processing and production. This results in complex product processes, low production efficiency, and high production costs.

[0006] Therefore, there is an urgent need for a mold structure that uses a high-efficiency progressive die, suitable for producing thick materials with double-sided thickening of the edges in a small area. Summary of the Invention

[0007] To address the problems existing in the prior art, this utility model provides a mold structure for double-sided thickening of the edge of thick materials, which is a progressive die. The thickening punch in the blank thickening component first extrudes the material in area A of the material strip edge downwards, forming a convex bulge in area B at the recess of the thickening insert in the lower die blank. The lower contour thickening insert in the contour thickening component extrudes the convex bulge in area B upwards. The contour thickening insert in the strip ejector presses the material, and the thickening punch forms the total height of the thickened material strip edge downwards, squeezing the excess material into the side area of ​​the product. The contour fine cutting insert and the contour fine cutting blade in the contour fine cutting component press the material strip product, and the contour fine cutting punch and the contour fine cutting blade work together to punch the product shape, ensuring the product's external dimensions. This mold structure effectively improves production efficiency and reduces production costs.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0009] A mold structure for double-sided thickening of the edges of a thick material product is a progressive mold, including an upper mold and a lower mold, and also including a blank thickening component, a contour thickening component and a contour precision cutting component arranged sequentially. The product strip is extruded by the blank thickening component to form a bottom thickened blank, the bottom thickened blank is extruded by the contour thickening component to form a double-sided thickened shape, and the double-sided thickened shape is precision cut by the contour precision cutting component to become a product with double-sided thickening of the edges.

[0010] Furthermore, the blank thickening assembly includes a blank thickening insert mounted on the stripper plate of the upper die, a blank thickening punch mounted on the upper clamping plate of the upper die, and a blank thickening insert mounted on the lower die base of the lower die.

[0011] Furthermore, the contouring and thickening assembly includes a stripper contouring and thickening insert mounted on the stripper plate of the upper die, a contouring and thickening punch (13) mounted on the upper clamping plate of the upper die, and a lower contouring and thickening insert mounted on the lower die base of the lower die.

[0012] Furthermore, the contour cutting assembly includes a contour cutting insert mounted on the stripper plate of the upper die, a contour cutting punch mounted on the upper clamping plate of the upper die, and a contour cutting blade mounted on the lower die base of the lower die.

[0013] Furthermore, the blank thickening punch is provided with a thickening extrusion angle, the width direction of the thickening extrusion angle is the extrusion surface, the extrusion surface is inclined upward, the inclination angle is 60º~75º, the height of the thickening extrusion angle is greater than the product material thickness, and the top of the lower die blank thickening insert is provided with a lower surface thickening pit.

[0014] Furthermore, the area of ​​the thickened recess on the lower surface is larger than the area of ​​the thickened part on the lower surface of the product, and the depth of the thickened recess on the lower surface is 0.2mm to 0.5mm greater than the sum of the thickened heights on both sides.

[0015] Furthermore, the bottom of the thickened insert of the plate blank is provided with a thickened recess on the upper surface.

[0016] Furthermore, the contouring surface of the stripping and thickening insert and the contouring punch after being combined is adapted to the thickening shape of the upper surface of the product. The top of the lower contouring and thickening insert is provided with a lower surface contouring step, which is adapted to the thickening shape of the lower surface of the product.

[0017] Furthermore, the bottom of the contour-cutting insert is provided with an upper surface milled contour step, the height of which is the same as the thickness of the upper surface of the product, and the top of the contour-cutting blade is provided with a lower surface milled contour step, the height of which is the same as the thickness of the lower surface of the product.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] This utility model provides a mold structure for double-sided thickening of a small area at the edge of a thick material product. It is a progressive die, suitable for strips with a thickness of 2.0mm to 8.0mm, made of copper or aluminum with excellent ductility, where the total height of the double-sided thickening does not exceed 0.25 times the material thickness, and the thickening area is small and located at the edge. The blank thickening punch in the blank thickening component first squeezes the material in area A of the strip edge downwards, forming a bulge in area B at the recess of the lower die blank thickening insert. The lower conforming thickening insert in the conforming thickening component squeezes the bulge in area B upwards, and the strip conforming thickening insert presses the material. The conforming thickening punch forms the total height of the thickened strip edge downwards and squeezes the excess material into the side area of ​​the product. The conforming precision cutting insert and conforming precision cutting edge in the conforming precision cutting component press the strip product, and the conforming precision cutting punch and conforming precision cutting edge work together to cut the product shape and ensure the product's external dimensions.

[0020] This mold structure solves the serious problems of complex processes, low production efficiency, and high production costs caused by thickening products on both sides. It optimizes the product process, improves production efficiency, reduces production costs, and has direct economic benefits. Attached Figure Description

[0021] Figure 1 is a schematic diagram of the mold opening of this utility model.

[0022] Figure 2 is a schematic diagram of the mold closing mechanism of this utility model.

[0023] Figure 3 is a side view of the product material strip of this utility model.

[0024] Figure 4 is a schematic diagram of the upper surface of the product strip of this utility model.

[0025] Figure 5 shows the state of the preform thickening component, the contour thickening component, and the contour precision cutting component of this utility model during mold opening.

[0026] The components include: 1. Lower die base; 2. Lower backing plate; 3. Lower template; 4. Stripper plate; 5. Stop plate; 6. Upper clamping plate; 7. Upper backing plate; 8. Upper die base; 9. Equal height sleeve assembly; 10. Rectangular spring; 11. Contouring precision cutting punch; 12. Contouring precision cutting insert; 13. Contouring thickening punch; 14. Stripper contouring thickening insert; 15. Blank thickening punch; 16. Stripper blank thickening insert; 17. Outer guide sleeve; 18. Inner guide post; 19. Upper die inner guide sleeve; 20. Product strip; 21. Lower die inner guide sleeve; 22. Lower die outer guide post assembly; 23. Lower die blank thickening insert; 24. Lower die contouring thickening insert; 25. Contouring precision cutting edge; 26. Inner limit post;

[0027] t represents the thickness of the strip, t1 represents the thickness of the lower surface, and t2 represents the thickness of the upper surface.

[0028] L is the height of the thickening extrusion angle of the thickening punch on the preform, and W is the inclination angle of the extrusion surface of the thickening extrusion punch on the preform. Detailed Implementation

[0029] The specific embodiments of this utility model will be further explained below with reference to the accompanying drawings.

[0030] As shown in Figures 1-5, this is a mold structure for double-sided thickening of a small area at the edge of a thick material product. It is a progressive mold, including an upper mold and a lower mold. It is suitable for strips with a thickness of 2.0mm to 8.0mm, made of copper or aluminum with excellent ductility, where the total height of the double-sided thickening does not exceed 0.25 times the material thickness, and the thickened area is small and located at the edge of the product.

[0031] The upper mold includes an upper mold base 8, an upper pad 7, an upper clamping plate 6, a stop plate 5, a stripper plate 4, a stripper blank thickening insert 16, a blank thickening punch 15, a stripper contour thickening insert 14, a contour thickening punch 13, a contour precision cutting insert 12, a contour precision cutting punch 11, an equal height sleeve assembly 9, a rectangular spring 10, an outer guide sleeve 17, an inner guide post 18, and an upper mold inner guide sleeve 19.

[0032] Specifically, the upper pad 7, upper clamping plate 6, and outer guide sleeve 17 are fixed on the upper mold base 8. The blank thickening punch 15, the contour thickening punch 13, the contour precision cutting punch 11, and the inner guide post 18 are fixed on the upper clamping plate 6. After the stripper plate 4 is installed with the upper mold inner guide sleeve 19, the stripper blank thickening insert 16, the stripper contour thickening insert 14, and the contour precision cutting insert 12, it is fixed together with the stop plate 5. It is connected to the upper mold base 8 through the equal height sleeve assembly 9 and is guided up and down by the inner guide post 18. The rectangular spring 10 is installed in the upper mold to provide elastic force for the sliding of the stop plate 5 and the stripper plate 4.

[0033] The lower mold includes a lower template 3, a lower pad 2, a lower mold base 1, a lower mold blank thickening insert 23, a lower mold contour thickening insert 24, a contour precision cutting edge 25, a lower mold inner guide sleeve 21, a lower mold outer guide post assembly 22, and an inner limiting post 26.

[0034] Specifically, the lower template 3, the lower pad 2, and the lower mold outer guide post assembly 22 are fixed on the lower mold base 1, and the lower mold blank thickening insert 23, the lower mold shaping thickening insert 24, the shaping precision cutting edge 25, the inner limiting post 26, and the lower mold inner guide sleeve 21 are installed inside the lower template 3.

[0035] The upper die blank thickening insert 16, the blank thickening punch 15, and the lower die blank thickening insert 23 constitute the blank thickening assembly. The blank thickening punch 15 is provided with a thickening extrusion angle. The height of the thickening extrusion angle is L, which is greater than the product material thickness T. The width is the extrusion surface. The extrusion surface is inclined upwards, and the inclination angle W is in the range of 60º~75º. Correspondingly, the lower die blank thickening insert 23 located on the lower side of the strip is provided with a lower surface thickening recess. The area of ​​the lower surface thickening recess is slightly larger than the area of ​​the product thickening point and is located directly below the product thickening point. The depth h is 0.2mm~0.5mm greater than the total height of double-sided thickening (t1+t2).

[0036] The blank thickening punch 15 pushes the material from the cut edge of the strip downwards into the processing recess of the lower die blank thickening insert 23, forming the initial bottom thickening blank.

[0037] As an alternative measure, a thickened recess is provided on the bottom of the thickened insert 16 on the strip blank, so that excess material can be squeezed onto the upper surface of the strip.

[0038] The upper die's stripper molding and thickening insert 14, molding and thickening punch 13, and the lower die's lower molding and thickening insert 24 constitute the molding and thickening assembly. The stripper molding and thickening insert 14 and the molding and thickening punch 13 cooperate and their molding surfaces are consistent with the thickening shape of the upper surface of the product, i.e., molding. The top of the lower molding and thickening insert 24 is provided with a lower surface molding step, and its molding surface is consistent with the thickening shape of the lower surface of the product, with a height of t1. Here, molding refers to the imitation of the product's shape.

[0039] The lower imitation thickening insert first presses upwards the initially formed bottom thickening blank, and then the upper and lower imitation thickening inserts together clamp the material strip. The imitation thickening punch then punches downwards to press the material strip, further squeezing the excess material into the area where both the upper and lower surfaces need to be thickened, forming a double-sided thickened shape, making the shape and height dimensions of the thickened product more accurate.

[0040] The upper die contour cutting insert 12, the contour cutting punch 11, and the lower die contour cutting blade 25 constitute a contour cutting assembly. The bottom of the contour cutting insert 12 is provided with an upper surface milled contour step with a depth of t2. The top of the contour cutting blade 25 is provided with a lower surface milled contour step with a depth of t1.

[0041] The downward movement of the contour cutting punch, together with the contour cutting insert and the contour cutting blade, removes the excess material from the double-sided thickened shape, ensuring the product's external dimensions and achieving double-sided thickening of a small area at the product's edge.

[0042] The working process of a mold structure for double-sided thickening of the edge of a thick material product as described in this embodiment:

[0043] During production, the mold is fixed to the punch press and the mold closing height is adjusted.

[0044] The upper die moves downward, the lower die outer guide post assembly 22 is inserted into the upper die outer guide sleeve 17, the upper die inner guide post 18 is inserted into the lower die inner guide sleeve 21, and the product strip 20 is fixed on the automatic feeding mechanism (built into the punch press).

[0045] The stripper plate 4 first contacts the product strip 20 and continues to move downwards, causing the product strip 20 to adhere to the lower template 3. Then, the upper mold, carrying the blank thickening punch 15, the contour thickening punch 13, and the contour precision cutting punch 11, moves downwards and compresses the rectangular spring 10. This causes the upper blank thickening punch 15 and the stripper blank thickening insert 16 to cooperate with the lower mold blank thickening insert 23. The blank thickening punch 15 first extrudes the material in area A next to it downwards, forming the B area convex bulge at the recess of the lower mold blank thickening insert 23. The bottom of the blank is thickened; the upper contouring thickening punch 13, the stripping contouring thickening insert 14 and the lower contouring thickening insert 24 cooperate with each other. The contouring thickening insert 24 pushes the B-area protrusion upward, the stripping contouring thickening insert 14 contours and presses the material, and the contouring thickening punch 13 forms the total height of the thickening and squeezes the excess material into the side area of ​​the product, forming a further double-sided thickened shape to achieve the product thickness; the upper contouring precision cutting punch 11, the contouring precision cutting insert 12 and the lower contouring precision cutting blade 25 cooperate with each other. The contouring precision cutting insert 12 and the contouring precision cutting blade 25 press the material strip product, and the contouring precision cutting punch 11 and the contouring precision cutting blade 25 work together to punch the product shape, ensuring the product's external dimensions, until the mold is closed, and the double-sided thickened product is formed in a small area at the edge.

[0046] When the mold opens, the upper mold part moves upward with the punch press slide. The rectangular spring 10 extends to release pressure, causing the blank thickening punch 15, the contour thickening punch 13, and the contour precision cutting punch 11 to separate from the product strip 20. The upper mold then drives the stripper plate 4 to continue moving upward through the equal height sleeve assembly 9 until the upper mold moves to the top dead center.

[0047] The automatic feeding mechanism drives the product material belt 20 to move sequentially between the blank thickening component, the contour thickening component, and the contour precision cutting component until the product is completed.

[0048] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A mold structure for double-sided thickening of a small area at the edge of a thick material product, which is a progressive mold, comprising an upper mold and a lower mold, characterized in that, It also includes a preform thickening component, a contour thickening component, and a contour precision cutting component arranged in sequence. The product strip is extruded and formed into a bottom thickened preform by the preform thickening component. The bottom thickened preform is extruded and formed into a double-sided thickened shape by the contour thickening component. The double-sided thickened shape is precision cut into a product with a small area of ​​double-sided thickening at the edge by the contour precision cutting component.

2. The mold structure for double-sided thickening of the edge of a thick material product in a small area according to claim 1, characterized in that, The blank thickening assembly includes a blank thickening insert (16) mounted on the stripper plate (4) of the upper mold, a blank thickening punch (15) mounted on the upper clamping plate (6) of the upper mold, and a blank thickening insert (23) mounted on the lower mold base (1) of the lower mold.

3. The mold structure for double-sided thickening of the edge of a thick material product in a small area according to claim 1, characterized in that, The contouring and thickening assembly includes a stripper contouring and thickening insert (14) mounted on the stripper plate (4) of the upper die, a contouring and thickening punch (13) mounted on the upper clamping plate (6) of the upper die, and a lower contouring and thickening insert (24) mounted on the lower die base (1) of the lower die.

4. The mold structure for double-sided thickening of the edge of a thick material product in a small area according to claim 1, characterized in that, The contour cutting assembly includes a contour cutting insert (12) mounted on the stripper plate (4) of the upper die, a contour cutting punch (11) mounted on the upper clamping plate (6) of the upper die, and a contour cutting blade (25) mounted on the lower die base (1) of the lower die.

5. The mold structure for double-sided thickening of the edge of a thick material product in a small area according to claim 2, characterized in that, The blank thickening punch (15) is provided with a thickening extrusion angle. The width direction of the thickening extrusion angle is the extrusion surface. The extrusion surface is inclined upward with an inclination angle of 60º~75º. The height of the thickening extrusion angle is greater than the product material thickness. The top of the lower die blank thickening insert (23) is provided with a lower surface thickening pit.

6. A mold structure for small area double sided thickening of a thick material product edge according to claim 5, characterized in that, The area of ​​the thickened recess on the lower surface is larger than the area of ​​the thickened part on the lower surface of the product, and the depth of the thickened recess on the lower surface is 0.2mm to 0.5mm greater than the sum of the thicknesses on both sides.

7. The mold structure for double-sided thickening of the edge of a thick material product in a small area according to claim 2, characterized in that, The bottom of the thickened insert (16) of the plate blank is provided with a thickened pit on the upper surface.

8. The mold structure for double-sided thickening of the edge of a thick material product in a small area according to claim 3, characterized in that, The contouring surface of the stripping and thickening insert (14) and the contouring and thickening punch (13) are adapted to the thickening shape of the upper surface of the product. The top of the lower contouring and thickening insert (24) is provided with a lower surface contouring step, which is adapted to the thickening shape of the lower surface of the product.

9. A mold structure for small area double sided thickening of a thick material product edge according to claim 4, characterized in that, The bottom of the contour-cutting insert (12) is provided with an upper surface milled contour step, the height of which is the same as the thickness of the upper surface of the product. The top of the contour-cutting cutter (25) is provided with a lower surface milled contour step, the height of which is the same as the thickness of the lower surface of the product.

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