Square tube pressing side punch

Abstract

This invention proposes a square pipe pressing and side punching die, including an upper pressure plate and a lower pressure plate. The lower pressure plate is provided with at least one pressing assembly and a side punching assembly. The pressing assembly includes several support seats, and a lower die is provided on the support seats. The lower die has a square cavity, and support blocks are provided on the four sides of the bottom of the square cavity. A shaping block is provided at the center of the support blocks. The upper pressure plate is provided with a first punching assembly corresponding to the pressing assembly and a second punching assembly corresponding to the side punching assembly. This die is provided with four sets of rotatable rotating blocks in the lower die, which cooperate with the support blocks with arc-shaped bottoms. By setting a power at the lower part of the rotating blocks, the rotating blocks are pushed to open in a flared form to facilitate the insertion of square workpieces. When the upper punch presses down, it can drive the rotating blocks to move closer to the pipe, and at the same time, the upper part of the pipe is hard-pressed in the cavity to form a boss. When removing the material, the rotating blocks can be separated from the pipe in a flared shape to facilitate the removal of the pipe.

Description

Technical Field

[0001] This invention relates to the field of heavy-duty stamping product manufacturing, and more particularly to a square tube pressing side punch die. Background Technology

[0002] Some automotive parts come in various shapes during manufacturing, such as... Figure 10 The part shown is a square hollow cylindrical component. According to product requirements, a boss protruding from the entire cylindrical component needs to be set at the opening. In existing technology, this can be achieved by casting. However, for some medium and large-sized components with bosses and hollow shapes, the casting process is cumbersome and requires subsequent surface treatment, resulting in high costs. Using traditional stamping methods, the metal material is hard and the product is long, making it difficult to position it when placed in the lower mold. Due to its length and hollow shape, the lower mold cavity must be precisely positioned for the product during forming, which leads to problems with placing and removing the product. Furthermore, the pipe itself has certain tolerances, and a fixed lower mold cavity is difficult to adapt to products with different tolerances. Summary of the Invention

[0003] To solve the above-mentioned technical problems, the present invention proposes a square pipe pressing and side punching die, including an upper pressure plate and a lower pressure plate. The lower pressure plate is provided with at least one pressing assembly and a side punching assembly. The pressing assembly includes several support seats, and a lower die is provided on the support seats. The lower die is provided with a square cavity, and support blocks are provided on the four sides of the bottom of the square cavity. A shaping block is provided at the center of the support blocks. The upper pressure plate is provided with a first punching assembly corresponding to the pressing assembly and a second punching assembly corresponding to the side punching assembly.

[0004] The support block includes a first horizontal part and a first arc-shaped part. The first arc-shaped part is located on the side away from the shaping block. A rotating block is rotatably arranged above the support block. Four sets of rotating blocks form a workpiece cavity. A second arc-shaped part is provided at the position where the rotating block fits with the first arc-shaped part. The second arc-shaped part is integrally formed with a second horizontal part.

[0005] The bottom of the square cavity is provided with a pushing device. The output end of the pushing device passes through the first horizontal part of the support block and pushes the rotating block to rotate along the rotating axis, so that the top of each rotating block opens in a trumpet shape.

[0006] The side of the rotating block away from the workpiece cavity forms a gap with the square cavity. When the mold is closed, the first stamping assembly is inserted into the gap and pushes the rotating block to rotate and be set vertically.

[0007] Preferably, the top of the rotating block is provided with a pressing and shaping groove on the side near the workpiece cavity.

[0008] Preferably, the bottom of the rotating block is provided with a clearance groove, which presses against the shaping block.

[0009] Preferably, the pushing device includes an air inlet block installed on the lower mold, the air inlet block having an air inlet, the air inlet having an ejector pin, the ejector pin passing through the template and inserted into the support block, the support block having a top head, the top of the top head being arc-shaped and pressing against the bottom of the support block.

[0010] Preferably, an mounting block is provided between adjacent support blocks, a rotating shaft passes through the lower part of the rotating block, both ends of the rotating shaft are fixed to the mounting block, and the position of the rotating shaft is set at the center of the second arc-shaped part of the rotating block.

[0011] Preferably, the first stamping assembly includes a first upper template, on which are arranged square pressing blocks, a square positioning block is provided at the center of the pressing blocks, and a first punch is provided on the outer ring of the square positioning block.

[0012] Preferably, the side punching assembly includes two sets of symmetrically arranged wedge blocks, each wedge block having a wedge surface on one side opposite to the other, a slide rail connected to the lower part of the wedge block, the wedge block moving on the slide rail, and a punch pin on the vertical surface of the opposite side of the wedge surface, the punch pin pointing towards the positioning column.

[0013] Preferably, the side wall of the positioning column is provided with a circular hole, which corresponds to the punch pin.

[0014] Preferably, a guide block is provided between the wedge block and the positioning column.

[0015] Preferably, the second stamping assembly includes inverted triangular blocks that press against the wedge-shaped surface.

[0016] The square pipe pressing side punching die proposed in this invention has the following beneficial effects: The die is equipped with four sets of rotatable rotating blocks in the lower die, and is equipped with a support block with an arc-shaped bottom. By setting a power at the lower part of the rotating block, the rotating block is pushed to open in a flared shape to facilitate the insertion of square workpieces. The rotating block can also automatically reset, and when the upper punch is pressed down, it can drive the rotating block to move closer to the pipe. At the same time, the upper part of the pipe is hardened and formed into a boss in the cavity. When removing the material, the rotating block can be separated from the pipe in a flared shape to facilitate the removal of the pipe. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0018] Figure 1 This is a three-dimensional schematic diagram of the lower mold of the present invention;

[0019] Figure 2This is a three-dimensional schematic diagram of the upper mold of the present invention;

[0020] Figure 3 This is a perspective view of the two sets of pier-stabilizing components of the present invention;

[0021] Figure 4 This is a cross-sectional view of the piercing assembly of the present invention;

[0022] Figure 5 This is a schematic diagram of the mounting of the rotating block according to the present invention;

[0023] Figure 6 This is an enlarged cross-sectional view of the pushing device of the present invention;

[0024] Figure 7 This is a three-dimensional schematic diagram of the first stamping component of the present invention;

[0025] Figure 8 This is a perspective view of the side-impact assembly of the present invention;

[0026] Figure 9 This is a cross-sectional view of the side impact assembly of the present invention;

[0027] Figure 10 This is a three-dimensional view of the finished product of the present invention;

[0028] The components are as follows: 1. Upper pressure plate; 2. Lower pressure plate; 3. Pressing assembly; 4. Side punch assembly; 5. Lower die; 6. Square cavity; 7. Support block; 8. Shaping block; 9. First stamping assembly; 10. Second stamping assembly; 11. First arc-shaped part; 12. First horizontal part; 13. Rotating block; 14. Second arc-shaped part; 15. Second horizontal part; 16. Empty space; 17. Pressing and shaping groove; 18. Avoidance groove; 19. Air inlet block; 20. Air inlet; 21. Rotating shaft; 22. Ejector pin; 23. Ejector head; 24. First upper template; 25. Lower pressing and pushing block; 26. Square positioning block; 27. First punch; 28. Wedge block; 29. ​​Slide rail; 30. Positioning column; 31. Punch pin; 32. Round hole; 33. Directional block; 34. Triangular block. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0030] like Figure 1 As shown, this invention proposes a square pipe pressing and side punching die, including an upper pressing plate 1 and a lower pressing plate 2. The lower pressing plate 2 is provided with at least one set of pressing components 3 and side punching components 4, such as... Figure 3 , Figure 4As shown, the pressing assembly 3 includes several support seats, a lower mold 5 is provided on the support seats, and a square cavity 6 is provided on the lower mold 5. For ease of assembly, the lower mold 5 can be set as two plates. Support blocks 7 are provided on the four sides of the bottom of the square cavity 6. A shaping block 8 is provided at the center of the support block 7. The bottom of the shaping block 8 passes through the square cavity 6 and is connected to the leveling block at the bottom of the support seat. The leveling block is used to raise the support seat and can position and support the shaping block 8. The function of the shaping block 8 is to position the blank of the square column when it is put in. The support blocks 7 are located around the shaping block 8.

[0031] like Figure 4 , Figure 5 As shown, the structure of the support block 7 is as follows: the support block 7 includes a first horizontal part 12 and a first arc-shaped part 11. The first arc-shaped part 11 is located on the side away from the shaping block 8. A rotating block 13 is rotatably arranged above the support block 7. Four sets of rotating blocks 13 form a workpiece cavity. The rotating blocks 13 are rotatable. A second arc-shaped part 14 is provided at the position where the rotating block 13 fits with the first arc-shaped part 11. The second arc-shaped part 14 is integrally formed with a second horizontal part 15. The rotating block 13 is placed in close contact with the first arc-shaped part 11, and the rotating block 13 is fixed by a mounting block between adjacent support blocks 7. The rotating block 13 has a rotating shaft 21 passing through its lower part, and the two ends of the rotating shaft 21 are fixed to the mounting block. The rotating shaft 21 is positioned at the center of the second arc-shaped part 14 of the rotating block 13. When the rotating block 13 is pushed, the rotating block 13 can rotate along the rotating shaft 21. The rotating block 13 has a clearance groove 18 at its lower part to facilitate the rotation of the rotating block and prevent interference with the shaping block 8.

[0032] The pushing device that pushes the rotating block 13 is located at the bottom of the square cavity. The output end of the pushing device passes through the first horizontal part 12 of the support block 7 and pushes the rotating block 13 to rotate along the rotating shaft 21. The pushing position is the side of the rotating block 13 close to the shaping block 8. When it is pushed upward, the top of each rotating block 13 opens in a trumpet shape, so that the square workpiece can be placed into the shaping block 8.

[0033] Among them, such as Figure 6 As shown, the pushing device includes an air intake block 19 installed on the lower mold 5. The air intake block 19 is provided with an air intake port 20. An ejector pin 22 is provided on the air intake port 20. The ejector pin 22 passes through the template and is inserted into the support block 7. A top head 23 is provided inside the support block 7. The top of the top head 23 is arc-shaped and presses against the bottom of the support block 7. By the air intake, the ejector pin 22 drives the top head 23 to push upward, pushing the rotating block 13 along the rotating shaft 21.

[0034] The rotating block 13 has a recessed groove 18 at its bottom, and the side of the rotating block 13 facing away from the workpiece cavity forms a gap 16 with the square cavity 6. During mold closing, if... Figure 1 , Figure 4 As shown, the first stamping assembly 9 is inserted into the cavity 16 and pushes the rotating block 13 to rotate and be vertically positioned. At this time, the pushing device is in a depressurized state, and the rotating block, after being pushed by the first stamping assembly 9, completely presses against the square tube, as shown. Figure 7 As shown, the first stamping assembly 9 includes a first upper die 24, on which are arranged square pressing blocks 25. The pressing blocks 25 are inserted into the space 16 formed by the rotating block on the side away from the workpiece cavity and the square cavity 6. A square positioning block 26 is provided at the center of the pressing blocks 25. A first punch 27 is provided around the outer ring of the square positioning block 26. A pressing and shaping groove 17 is provided on the top side of the rotating block 13 near the workpiece cavity. When the first punch 27 of the upper die presses down, the square positioning block 26 in the middle is inserted into the center of the square tube for positioning. At the same time, the first punch 27 is pressed down hard at the opening of the square tube, and the square tube is formed in the pressing and shaping groove 17 of the rotating block 13, that is, a boss is formed. After the forming is completed, the upper die opens, and the pusher head 23 pushes the rotating block 13 to rotate into an open form, separating it from the formed product, so as to facilitate the product removal. The above product placement and removal are both realized by an external robot.

[0035] In this embodiment, when the mold is closed, the product is pressed from four directions by means of the rotating block 13, which can solve the tolerance problem of the square tube itself and make the workpiece positioning more stable during pressing.

[0036] After the pressing is completed, the workpiece still needs to be side-punched. The upper pressure plate 1 is provided with a first punching component 9 corresponding to the pressing component 3 and a second punching component 10 corresponding to the side punching component 4; for example Figure 8 , Figure 9As shown, the side punching assembly 4 includes two sets of symmetrically arranged wedge blocks 28. Each wedge block 28 has a wedge-shaped surface on its opposite side. A slide rail 29 is connected to the lower part of each wedge block 28, allowing the wedge blocks 28 to move on the slide rail 29. A punch 31 is provided on the vertical surface of the opposite side of the wedge-shaped surface, pointing towards a positioning column 30. The positioning column 30 is a square tube used to position the boss and press it in place. The robotic arm grips the tube and places it on the positioning column 30. The side wall of the positioning column 30 has a circular hole 32. The positioning column 30 has a hollow structure. The circular hole 32 corresponds to the punch 31. When the upper die is pressed down, the triangular block 34 of the second stamping component 10 on the upper die is pressed down and pressed on the wedge-shaped surface, pushing the wedge block 28 along the slide rail 29 towards the workpiece, so that its punch 31 punches towards the product. The punched material falls from the circular hole 32 on the side wall of the positioning column 30 into the interior of the positioning column 30. The template at the bottom of the positioning column also has a hole, and the waste material falls from the bottom. A guide block 33 is provided between the wedge block 28 and the positioning column 30. The guide block 33 passes through the punch 31 to ensure the strength of the punch 31 and prevent breakage.

Claims

1. A square tube pressing side punch die comprising an upper press plate and a lower press plate, characterized in that, The lower pressure plate is provided with at least one set of pressing assembly and side punching assembly. The pressing assembly includes several support seats, a lower die is provided on the support seat, a square cavity is provided on the lower die, support blocks are provided on the four sides of the bottom of the square cavity, and a shaping block is provided at the center of the support block. The upper pressure plate is provided with a first stamping assembly corresponding to the pressing assembly and a second stamping assembly corresponding to the side punching assembly. The support block includes a first horizontal part and a first arc-shaped part. The first arc-shaped part is located on the side away from the shaping block. A rotating block is rotatably arranged above the support block. Four sets of rotating blocks form a workpiece cavity. A second arc-shaped part is provided at the position where the rotating block fits with the first arc-shaped part. The second arc-shaped part is integrally formed with a second horizontal part. The bottom of the square cavity is provided with a pushing device. The output end of the pushing device passes through the first horizontal part of the support block and pushes the rotating block to rotate, so that the top of each rotating block opens in a trumpet shape. The side of the rotating block away from the workpiece cavity forms a gap with the square cavity. When the mold is closed, the first stamping assembly is inserted into the gap and pushes the rotating block to rotate and be set vertically.

2. The square pipe pier side-pressing die according to claim 1, characterized in that, The top of the rotating block is provided with a pressing and shaping groove on the side near the workpiece cavity.

3. The square pipe pier side-pressing die according to claim 1, characterized in that, The bottom of the rotating block is provided with a clearance groove.

4. The square pipe pier side-pressing die according to claim 1, characterized in that, The pushing device includes an air inlet block installed on the lower mold, an air inlet on the air inlet, an ejector pin on the air inlet, the ejector pin passing through the template and inserted into the support block, and a top head inside the support block, the top of the top head being arc-shaped and pressing against the bottom of the support block.

5. The square pipe pier side-pressing die according to claim 1, characterized in that, An installation block is provided between adjacent support blocks. A rotating shaft passes through the lower part of the rotating block. Both ends of the rotating shaft are fixed to the installation block. The position of the rotating shaft is set at the center of the second arc-shaped part of the rotating block.

6. The square pipe pier side-pressing die according to claim 1, characterized in that, The first stamping assembly includes a first upper die plate, on which are arranged square pressing blocks. A square positioning block is provided at the center of the pressing blocks, and a first punch is provided on the outer ring of the square positioning block.

7. The square pipe pier side-pressing die according to claim 1, characterized in that, The side punching assembly includes two sets of symmetrically arranged wedge blocks. Each wedge block has a wedge-shaped surface on its opposite side. A slide rail is connected to the lower part of each wedge block, and the wedge block moves on the slide rail. A punch is provided on the vertical surface of the opposite side of the wedge-shaped surface, and the punch points to the positioning column.

8. The square pipe pier side-pressing die according to claim 7, characterized in that, The side wall of the positioning column is provided with a round hole, which corresponds to the punch pin.

9. The square pipe pier side-pressing die according to claim 7, characterized in that, A guide block is provided between the wedge-shaped block and the positioning column.

10. The square pipe pier side-pressing die according to claim 7, characterized in that, The second stamping assembly includes inverted triangular blocks that press against the wedge-shaped surface.

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