A side punching and stretching die

Abstract

This utility model discloses a side-punching and stretching die, including a die base and a cutting punch that can be inserted into the inner cavity of a product to punch the product from the inside out. A sliding seat is slidably connected inside the die base, capable of driving the cutting punch to move horizontally. The cutting punch passes through the sliding seat and is fixedly connected to the sliding seat by screws. A limiting seat that can horizontally limit the product and a stroke drive that can drive the sliding seat to move are installed above the die base. This utility model, by setting the cutting punch to punch from the inside out, transforms the inner wall burrs generated by side punching into outer wall burrs. The outer burrs are easily removed by conventional processes, such as grinding and vibration finishing, reducing the risk of burrs damaging assembly components, improving product surface quality and assembly compatibility, and is especially suitable for deep-drawn parts and precision products with small step differences, solving the problem that traditional dies are too large to fit the workstations.

Description

Technical Field

[0001] This utility model relates to the field of cold stamping die technology, specifically a side-punching and stretching die. Background Technology

[0002] When using a traditional wedge-driven structure to perform multi-station sidewall stamping on deep-drawn products and products with small step differences, burrs will appear on the inner wall of the workpiece because the stamping die stamps from the outside to the inside. These burrs are not easy to remove and may damage other functional parts in the assembly or cause assembly failure.

[0003] Furthermore, the traditional wedge drive structure is complex and wide, making it difficult to adapt to machine tools with only 16 workstations and a step distance of 76.2mm, and therefore unsuitable for installation on precision molds. Utility Model Content

[0004] The purpose of this utility model is to provide a side punching and drawing die. The driving structure of the die is simple and the stroke is small, which enables the deep-drawn product to punch from the inside to the outside, so that the side punching burrs become outward. The external burrs are easier to remove than the internal burrs, thereby improving product quality and assembly adaptability.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a side-punching and stretching die, comprising a die base and a cutting punch capable of inserting into the inner cavity of a product to punch the product from the inside out. A sliding seat capable of driving the cutting punch to move horizontally is slidably connected within the die base. The cutting punch passes through the sliding seat and is fixedly connected to the sliding seat by screws. A limiting seat capable of horizontally limiting the product and a stroke drive capable of driving the sliding seat are installed above the die base. A first nitrogen spring that automatically resets the sliding seat is installed at one end of the die base. A fixing plate providing a mounting position for the stroke drive is provided above the die base. A clamping structure capable of pressing the product into the limiting seat and a second nitrogen spring driving the clamping structure to reset are installed at one end of the fixing plate. Two sets of push rods capable of pushing the side-punched product upwards out of the limiting seat are provided at the bottom of the die base.

[0006] Preferably, the stroke drive includes a drive block, the top of which is fixedly connected to a fixing plate by screws, the bottom of which is provided with a bending part, and the upper surface of the sliding seat is provided with a through groove for the bending part to be inserted.

[0007] Preferably, the limiting seat includes two mirror-symmetrical limiting blocks and a fixing block disposed on both sides of the two limiting blocks. The fixing block and the limiting blocks are fixedly connected to the top of the mold base by screws.

[0008] Preferably, one side of the limiting seat is provided with an arc-shaped groove for placing the product, the bottom of the arc-shaped groove is provided with an integrally formed step for supporting the product, and the inner wall of the arc-shaped groove is provided with a side groove for inserting a cutting punch when it moves horizontally with the sliding seat.

[0009] Preferably, the top of the top rod is provided with an integrally formed extension crossbar, the upper surface of the sliding seat is provided with a clearance groove for the top rod to pass through, and one side of the limiting seat is provided with a slot for the extension crossbar to be inserted.

[0010] Preferably, the clamping structure includes a pressure rod, the bottom end of which has a groove adapted to the shape of the top of the product, and the top end of the pressure rod is fixedly connected to the piston rod of the second nitrogen spring.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. This utility model transforms the inner wall burrs generated by side punching into outer wall burrs by setting a cutting punch that punches from the inside to the outside. The outer burrs are easily removed by conventional processes such as grinding and vibratory finishing, which can reduce the risk of burrs damaging the assembled functional parts, improve the surface quality and assembly adaptability of the product, and is especially suitable for deep-drawn parts and precision products with small step differences.

[0013] 2. This utility model abandons the complex wedge drive mechanism and adopts a direct drive structure with a sliding seat and a bent part of the drive block. It also integrates an ejector mechanism, reduces the horizontal width, and is compatible with a 16-station precision punch press with a station spacing of only 76.2mm. This solves the problem that traditional molds cannot be adapted to the station due to their large size. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram showing the position of the cutting punch of this utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the cutting punch of this utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the limiting block of this utility model.

[0018] In the diagram: 1. Die base; 2. Cutting punch; 3. Sliding seat; 4. Limiting seat; 5. Stroke drive; 6. First nitrogen spring; 7. Fixing plate; 8. Clamping structure; 9. Second nitrogen spring; 10. Push rod; 11. Product; 501. Drive block; 502. Bending part; 503. Through groove; 401. Limiting block; 402. Fixing block; 403. Arc groove; 404. Step; 405. Side groove; 101. Extension crossbar; 301. Relief groove; 406. Slot; 801. Pressure rod; 802. Groove. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-4 This utility model provides a technical solution: a side-punching and stretching die, including a die base 1, which serves as the basic support for the die, and a cutting punch 2 that can be inserted into the inner cavity of a product 11 to punch the product 11 from the inside to the outside. The cutting punch 2 has the following structure: Figure 3 As shown, it has a cutting edge and achieves side punching by contacting the inner wall of product 11. The mold base 1 is slidably connected to a sliding seat 3 that can drive the cutting punch 2 to move horizontally. When the sliding seat 3 moves horizontally, it drives the cutting punch 2 to move horizontally. For example, when the sliding seat 3 moves to the left, the cutting punch 2 punches the left side wall of product 11. When the sliding seat 3 moves to the left, the cutting punch 2 punches the right side wall of product 11.

[0021] The cutting punch 2 passes through the sliding seat 3 and is fixedly connected to the sliding seat 3 by screws. A limiting seat 4 capable of horizontally limiting the product 11 and a stroke drive 5 capable of driving the sliding seat 3 to move are installed above the mold base 1. The stroke drive 5 is as follows: Figure 1 As shown, the stroke drive 5 is driven by an external lifting device to lift and lower, and the vertical downward motion is converted into the horizontal movement of the sliding seat 3 by inserting into the inclined slot;

[0022] One end of the mold base 1 is equipped with a first nitrogen spring 6 that automatically resets the sliding seat 3. A fixing plate 7 is provided above the mold base 1 to provide a mounting position for the stroke drive 5. One end of the fixing plate 7 is equipped with a pressing structure 8 that can press the product 11 into the limiting seat 4 and a second nitrogen spring 9 that drives the pressing structure 8 to reset. The bottom of the mold base 1 is equipped with two sets of push rods 10 that can push the side-punched product 11 upward out of the limiting seat 4.

[0023] The first nitrogen spring 6 and the second nitrogen spring 9 are both products that can be purchased directly on the market. Both the first nitrogen spring 6 and the second nitrogen spring 9 consist of a sealed cylinder, a piston rod that can move inside the cylinder, and high-pressure nitrogen gas inside.

[0024] The stroke drive 5 includes a drive block 501. The top of the drive block 501 is fixedly connected to the fixing plate 7 by screws, and the bottom of the drive block 501 is provided with a bending part 502, such as... Figure 1 As shown, the length of the bending part 502 determines the stroke that the sliding block 3 can be driven. The upper surface of the sliding block 3 is provided with a through groove 503 for the bending part 502 to be inserted. The inclination angle of the through groove 503 is adapted to the bending angle of the driving block 501.

[0025] The limiting seat 4 includes two mirror-symmetrical limiting blocks 401 and fixing blocks 402 disposed on both sides of the two limiting blocks 401, such as Figure 4 As shown, product 11 is placed between two limiting blocks 401. The fixing block 402 can prevent the limiting blocks 401 from shifting to both sides during side punching. Both the fixing block 402 and the limiting block 401 are fixedly connected to the top of the mold base 1 by screws.

[0026] The limiting seat 4 has an arc-shaped groove 403 on one side for placing the product 11. The arc-shaped groove 403 is adapted to the shape of the outer wall of the product 11. The bottom of the arc-shaped groove 403 is provided with an integrally formed step 404 to support the product 11. By setting the step 404, when the product 11 is placed between the two sets of limiting blocks 401, the bottom of the product 11 is supported on the step 404, so that the cutting punch 2 can extend out of the inner cavity of the product 11 from the bottom of the product 11 and punch from the inside to the outside. The inner wall of the arc-shaped groove 403 has a side groove 405 for the cutting punch 2 to be inserted when it moves horizontally with the sliding seat 3. When the cutting punch 2 moves horizontally with the sliding seat 3, the two sides of the cutting punch 2 contact the inner wall of the product 11 and are inserted into the side groove 405 during the continued movement. The side groove 405 can prevent the cutting punch 2 from interfering with the limiting block 401.

[0027] The top of the top rod 10 is provided with an integrally formed extension crossbar 101. By providing the extension crossbar 101, the contact area between the top rod 10 and the bottom of the product 11 is increased, so that the two sets of top rods 10 push upwards symmetrically at two points on the bottom of the product 11. The upper surface of the sliding seat 3 is provided with a clearance groove 301 for the top rod 10 to pass through. The side of the limiting seat 4 is provided with a slot 406 for the extension crossbar 101 to be inserted.

[0028] The pressing structure 8 includes a pressure rod 801. The bottom end of the pressure rod 801 is provided with a groove 802 that is adapted to the top shape of the product 11. By setting the groove 802, when the pressure rod 801 is pressed down, the groove 802 causes the pressure rod 801 to cover the top of the product 11, thereby limiting and pressing the product 11 laterally. The top end of the pressure rod 801 is fixedly connected to the piston rod of the second nitrogen spring 9.

[0029] In use, the operator or automated equipment places the deep-drawn product 11 to be processed into the limiting seat 4 of the mold, that is, into the space formed between two mirror-symmetrical limiting blocks 401. The outer wall of the product 11 fits against the inner wall of the arc-shaped groove 403 of the limiting block 401, and the bottom of the product 11 rests on the step 404 of the limiting block 401. The structure of the product 11 is as follows: Figure 3 As shown, the SPCD material is 1.5mm thick and needs to be grooved on the side wall according to the set dimensions.

[0030] The external press drives the upper mold part, including the fixed plate 7, the stroke drive 5, and the pressing structure 8, to start moving downward. The pressure rod 801 of the pressing structure 8 first contacts the top of the product 11. The groove 802 at the bottom of the pressure rod 801 is adapted to the shape of the top of the product 11 and covers the top of the product 11. As the upper mold continues to move downward, the pressure rod 801 overcomes the resistance of the second nitrogen spring 9 and firmly presses the product 11 onto the step 404 of the limit seat 4.

[0031] The drive block 501 of the stroke drive 5 moves downward together with the fixed plate 7. The bent part 502 at the bottom of the drive block 501 begins to insert into the inclined through groove 503 on the upper surface of the sliding seat 3. Since the bent part 502 contacts the inclined surface of the inclined through groove 503, the vertical downward movement of the drive block 501 is converted into the horizontal movement of the sliding seat 3. The left and right movement of the sliding seat 3 depends on the direction of the bend, such as... Figure 1 In the middle, the sliding block 3 moves to the right.

[0032] The sliding seat 3 slides inside the mold base 1, driving the cutting punch 2, which is fixedly connected to it by screws, to move to the right together. The cutting punch 2 moves horizontally to the right from inside the product 11. The cutting edge of the cutting punch 2 contacts the inner wall of the product 11 and, under the continuous horizontal thrust, penetrates the side wall of the product 11 from the inside to the outside to complete the side punching.

[0033] The piston rod of the first nitrogen spring 6 extends under the action of internal high-pressure nitrogen gas, pushing the sliding seat 3 to move horizontally and return to its initial position. At the same time, the cutting punch 2 also exits from the side groove 405 along with the sliding seat 3, retracts to the center area of ​​the inner cavity of the product 11, and finally completely exits the inner cavity of the product 11 as the upper die rises.

[0034] As the upper mold moves upward, the piston rod of the pressure rod 801 of the clamping structure 8 extends under the action of the second nitrogen spring 9, pushing the pressure rod 801 upward to reset and disengage from the top of the product 11, thus releasing the clamping force on the product 11. At the same time, the two sets of ejector rods 10 at the bottom of the mold base 1 move upward under the action of the external ejection mechanism. The integrally formed extension crossbar 101 at the top of the ejector rod 10 passes through the relief groove 301 on the sliding seat 3 and the slot 406 on the limiting seat 4, symmetrically contacting the bottom of the product 11. The ejector rod 10 continues to rise, and through the extension crossbar 101, it smoothly ejects the product 11, which has completed the side punching, upward from the arc groove 403 of the limiting seat 4, causing it to disengage from the limiting block 401.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A side piercer stretch die characterized by: The device includes a mold base (1) and a cutting punch (2) that can be inserted into the inner cavity of the product (11) to punch the product (11) from the inside to the outside. A sliding seat (3) that can drive the cutting punch (2) to move horizontally is slidably connected inside the mold base (1). The cutting punch (2) passes through the sliding seat (3) and is fixedly connected to the sliding seat (3) by screws. A limiting seat (4) that can horizontally limit the product (11) and a stroke drive (5) that can drive the sliding seat (3) to move are installed above the mold base (1). 1) One end is equipped with a first nitrogen spring (6) that automatically resets the sliding seat (3). A fixing plate (7) is provided above the mold base (1) to provide a mounting position for the stroke drive (5). One end of the fixing plate (7) is equipped with a pressing structure (8) that can press the product (11) into the limiting seat (4) and a second nitrogen spring (9) that drives the pressing structure (8) to reset. The bottom of the mold base (1) is equipped with two sets of push rods (10) that can push the side-punched product (11) upward out of the limiting seat (4).

2. The side-punching and stretching die according to claim 1, characterized in that: The stroke drive (5) includes a drive block (501), the top of which is fixedly connected to the fixing plate (7) by screws, and the bottom of the drive block (501) is provided with a bending part (502). The upper surface of the sliding seat (3) is provided with a through groove (503) for the bending part (502) to be inserted.

3. The side-punching and stretching die according to claim 1, characterized in that: The limiting seat (4) includes two mirror-symmetrical limiting blocks (401) and a fixing block (402) disposed on both sides of the two limiting blocks (401). The fixing block (402) and the limiting block (401) are both fixedly connected to the top of the mold base (1) by screws.

4. A side-punching and stretching die according to claim 3, characterized in that: The limiting seat (4) has an arc-shaped groove (403) on one side for placing the product (11). The bottom of the arc-shaped groove (403) is provided with an integrally formed step (404) to support the product (11). The inner wall of the arc-shaped groove (403) is provided with a side groove (405) for inserting the cutting punch (2) when it moves horizontally with the sliding seat (3).

5. A side-punching and stretching die according to claim 1, characterized in that: The top of the top rod (10) is provided with an integrally formed extension crossbar (101), the upper surface of the sliding seat (3) is provided with a relief groove (301) for the top rod (10) to pass through, and the side of the limiting seat (4) is provided with a slot (406) for the extension crossbar (101) to be inserted.

6. A side-punching and stretching die according to claim 1, characterized in that: The pressing structure (8) includes a pressure rod (801), the bottom end of which is provided with a groove (802) adapted to the top shape of the product (11), and the top end of the pressure rod (801) is fixedly connected to the piston rod of the second nitrogen spring (9).

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