A switchable punch structure

Abstract

The utility model provides a switchable punch structure, which sets a clearance hole on the stamping stroke trajectory of the punching punch. When the punching punch is not needed, the switch cylinder drives the draw plate to slide so that the clearance hole slides to the stamping stroke trajectory of the punching punch. When the punching punch moves downward, the punching material will push the punching punch back into the clearance hole to achieve punching without holes. When the punching punch is needed, the switch cylinder drives the draw plate to move the clearance hole away from the stamping stroke trajectory of the punching punch. When the punching punch is subjected to force, it will directly act on the punching die to complete the punching operation of the punching material. In the present application, by switching the settings of the cylinder, the draw plate and the clearance hole, the top hole punching process of the two heat sink fin products can be realized based on the sliding of the clearance hole to different positions, which effectively saves the mold opening cost.

Description

Technical Field

[0001] The utility model relates to the technical field of stamping equipment, in particular to a switchable punch structure. Background Art

[0002] The heat sink fin is a part of the automobile cooling system. The product is completed by continuous stamping of the progressive die. The two existing heat sink fin products RF1 and RF12 are shaped like Figure 1 As shown, the structural difference is that there are two holes a1 on the top of the heat sink RF1, and these two holes need to be punched at the same time; of the two holes on the top of the heat sink RF2, only one hole a2 needs to be punched, and hole b2 does not need to be punched. The rest of the structure and size of the two heat sink products are the same. If the design ideas of the stamping molds in the prior art are followed, two sets of molds need to be designed to complete the stamping process of the heat sink fin products RF1 and RF12 respectively. The stamping mold corresponding to the holes on the top of the heat sink RF1 is as follows. Figure 2 As shown in FIG. 1 , two holes a (1) are set on the die. The stamping die corresponding to the top hole of the heat sink fin RF2 is as follows: Figure 3 As shown, only one hole a(2) is set on the mold, and the position b(2) adjacent to a(2) is not set with a hole and does not need to be punched. However, this design idea will lead to an increase in the overall production cost. Summary of the invention

[0003] In order to solve the problem that designing a stamping die based on existing design ideas will lead to increased production costs, the utility model provides a switchable punch structure, which can realize the top hole stamping process of two heat sink fin products without designing two sets of stamping dies, effectively saving mold opening costs.

[0004] The structure of the utility model is as follows: a switchable punch structure, which includes: a punching punch, a punch fixing plate, and an upper die seat, and is characterized in that it also includes: a conversion structure;

[0005] The conversion structure includes: a switching cylinder, a draw plate, a force transmission cushion column and a yielding hole;

[0006] The switching cylinder is fixed on the upper die seat, and the stroke direction of the output shaft of the switching cylinder is perpendicular to the stamping stroke direction of the punching punch; the draw plate is slidably mounted on the upper die seat; the output shaft of the switching cylinder is connected to one end of the draw plate, and the other end of the draw plate is provided with the yield hole on the side wall adjacent to the punching punch;

[0007] One end of the force transmission pad column is connected to the punching punch, and the other end is set as a yielding end head, and the yielding end head is adapted to the shape and size of the yielding hole; the punching punch and the force transmission pad column are perpendicular to the drawing plate, and are slidably installed between the drawing plate and the punching die, and the stamping stroke trajectory line of the punching punch has an intersection with the sliding trajectory of the yielding hole.

[0008] It is further characterized by:

[0009] It also includes: a punch pressing plate and a reset slide;

[0010] The punch pressing plate is arranged on the punch fixing plate, and the reset slide groove is arranged on the side wall of the punching punch; one end of the punch pressing plate extends into the reset slide groove; the reset slide groove is arranged along the punching direction of the punching punch, and the distance between the reset slide groove and the draw plate on one side adjacent to the draw plate ensures that the force pad column is pressed against the draw plate; the length of the reset slide groove is greater than or equal to the depth of the give way hole;

[0011] It also includes: a limiting slide groove and a limiting pin;

[0012] A limiting slide groove is arranged on the draw plate along the sliding direction of the yield hole, the limiting pin is arranged on the upper die seat, and the top end of the limiting pin is arranged in the limiting slide groove; the length of the limiting slide groove is the preset sliding distance of the draw plate.

[0013] The utility model provides a switchable punch structure, which sets a clearance hole on the stamping stroke trajectory of the punching punch. When the punching punch is not needed, the switch cylinder drives the draw plate to slide so that the clearance hole slides to the stamping stroke trajectory of the punching punch. When the punching punch moves downward, the punching material will push the punching punch back into the clearance hole to achieve punching without holes. When the punching punch is needed, the switch cylinder drives the draw plate to move the clearance hole away from the stamping stroke trajectory of the punching punch. When the punching punch is subjected to force, it will directly act on the punching die to complete the punching operation of the punching material. In the present application, by switching the settings of the cylinder, the draw plate and the clearance hole, the top hole punching process of the two heat sink fin products can be realized based on the sliding of the clearance hole to different positions, which effectively saves the mold opening cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of a heat sink fin product;

[0015] Figure 2 It is a structural schematic diagram of a mold in the prior art;

[0016] Figure 3 It is a schematic diagram of the punching state of the switchable punch structure;

[0017] Figure 4 for Figure 3 The schematic diagram of the structure after the enlargement of B in the middle;

[0018] Figure 5 It is a structural schematic diagram of the punching punch in a punching state without holes;

[0019] Figure 6 for Figure 5 The schematic diagram of the structure after the enlargement of C in the middle;

[0020] Figure 7 It is a schematic diagram of the positional relationship between the conversion structure and the product;

[0021] Figure 8 for Figure 7 Schematic diagram of the structure after enlarging point D in the middle. DETAILED DESCRIPTION

[0022] like Figure 3~Figure 8 As shown, the utility model includes a switchable punch structure, which includes: a punching punch 10, a punch fixing plate 10-1, an upper die seat 8 and a conversion structure. The conversion structure includes: a switching cylinder 3, a draw plate 4, a force transmission pad column 11 and a yielding hole 7.

[0023] The lower die base 9 is arranged on the punch press 1, the punching punch pad 12-1 is fixed on the lower die base 9, the die fixing plate 12-2 is arranged on the side of the punching die pad 12-1 away from the lower die base, the punching die 12 is arranged in the die fixing plate 12-2, and the stripper plate 14 is detachably arranged above the punch fixing plate 12-2. The product 2 is arranged between the stripper plate 14 and the die fixing plate 12-2. The stripper plate insert 14-1 and the stripper plate insert 14-2 are arranged on the stripper plate 14.

[0024] The switching cylinder 3 is fixed on the upper die base 8 , and the stroke direction of the output shaft of the switching cylinder 3 is perpendicular to the stamping stroke direction of the punching punch 10 .

[0025] The upper die seat 4 is provided with a slide groove, and the draw plate 4 is slidably installed in the draw plate slide groove in the upper die seat 8. The draw plate cover plate 4-1 closes the draw plate slide groove where the draw plate 4 is located to prevent impurities from entering the draw plate slide groove during use. The output shaft of the switching cylinder 3 is connected to one end of the draw plate 4 through the cylinder connecting nut 5, driving the draw plate 4 to slide along the draw plate slide groove.

[0026] The punching punch 10 and the force transmission pad 11 are perpendicular to the draw plate 4 and are slidably mounted between the draw plate 4 and the punching die 12. The punch pad 10-2 is arranged below the upper die seat 8, and the punch fixing plate 10-1 is arranged at the bottom of the punch pad 10-2; Figures 5 and 6The embodiment after mold closing shown is an embodiment of punching with holes. After the top of the transfer pad column 11 passes through the upper die seat 8, it presses against the side wall of the bottom end surface of the draw plate 4, and the other end passes through the punch fixing plate 12-2 to connect the punching punch 11. The punching punch 11 passes through the punch fixing plate 10-1, and then passes through the unloading plate 14 and the unloading insert 14-2, and then penetrates into the through hole of the punching die 12. In this embodiment, the punching punch 11 enters the punching die 12 to obtain a depth of d1 when punching, and the value of d1 is 4.50mm.

[0027] One end of the draw plate 4 is connected to the switching cylinder 3 , and the other end is provided with a clearance hole 7 on the side wall adjacent to the punching punch 10 .

[0028] One end of the force transmission column 11 is connected to the punching punch 10, and the other end is set as a clearance end head, the size and shape of which are adapted to the inner cavity of the clearance hole 7 to ensure that the clearance end head can be inserted into the clearance hole 7. The specific shapes of the clearance end head include: cylindrical, hemispherical and any easy-to-process shape. Figure 4 and Figure 6 In the embodiment, the yielding end is configured to be in the shape of a truncated cone with a gradually decreasing diameter, and the yielding hole 7 is also configured to be in the shape of a truncated cone.

[0029] The punching stroke trajectory of the punching punch 10 intersects with the sliding trajectory of the hole 7. In the default state, it is punching with a hole, such as Figure 6 As shown, the clearance hole 7 is not on the extension line of the force transfer pad column 11. When the upper die seat 8 is subjected to force, the draw plate 4 transfers the force to the transfer pad column 11 and the punching punch 10. Once it is necessary to perform hole-free punching, as shown in FIG. Figure 5 As shown, the switching cylinder 3 is started, pushing the clearance hole 7 on the draw plate 4 to slide toward the force transmission pad column 11 until the clearance hole 7 is located on the extension line of the force transmission pad column 11, and the switching cylinder 3 stops.

[0030] In this state, when the upper die base 8 is forced to move toward the lower die base, the punching punch 10 is carried by the punching die 12 downward, and the punching material will push the punching punch 10 back into the clearance hole 7, thus achieving punching without holes. Figure 6 In the embodiment shown, the sliding distance of the clearance hole 7 is d2, reaching the extension line of the force transmission pad column 11; after the punching punch 10 is pushed back by the product, the distance from the upper surface of the product is d3. In this embodiment, d2 is 20 mm and d3 is 2 mm.

[0031] In the working state, the upper die base 8 is placed horizontally, the punching punch 10 and the force transmission pad 11 are vertically arranged below the upper die base 8, and because the punching punch 10 and the force transmission pad 11 are slidably installed in the punch fixing plate 10-1 and the punch pad 10-2, in order to ensure that the punching punch 10 will not slide from the punch fixing plate 10-1 due to gravity, and at the same time realize the switching of the two stamping states, a punch pressing plate 13 and a reset slide groove 10-3 are set in this application.

[0032] The punch pressing plate 13 is arranged on the punch fixing plate 10-1, and the reset chute 10-3 is provided on the side wall of the punching punch 10; one end of the punch pressing plate 13 extends into the reset chute 10-3; the reset chute 10-3 is arranged along the punching direction of the punching punch 10, and the distance between the reset chute 10-3 and the draw plate 4 on the side close to the draw plate 4 ensures that the force pad column presses against the draw plate 4, thereby ensuring that the draw plate 4 can transfer the force to the punching punch 10 without loss when there is empty punching. The length of the reset chute 10-3 is greater than or equal to the depth of the clearance hole 7, ensuring that the clearance end of the transfer pad column 11 can fully enter the clearance hole 7; at the same time, after the non-hole punching process is completed, after the upper die seat 8 is lifted, the punching punch 10 and the force transfer pad column 11 will slide out of the clearance hole 7 due to gravity, and reset to the position of empty punching based on the reset chute 10-3.

[0033] like Figure 7 and Figure 8 As shown, the two holes of product 2: the first hole 2-1 needs to be punched, and the second hole 2-2 does not need to be punched. For the punch corresponding to the second hole 2-2, the draw plate 4 needs to drive the hole 7 to reach the extension line of the force transmission pad column 11 to achieve hole-free punching. In order to ensure the accurate sliding distance of the draw plate 4, the present application sets a limit slide groove 6 and a limit pin 6-1.

[0034] A limit slot 6 is provided on the draw plate 4 along the sliding direction of the yield hole 7, and a limit pin 6-1 is provided on the upper die seat 8, and the top end of the limit pin 6-1 is provided in the limit slot 6; the length of the limit slot 6 is the preset sliding distance of the draw plate 4. When the switching cylinder 3 is started and drives the draw plate 4 to slide, the limit slot 6 and the limit pin 6-1 move relative to each other, and the distance before and after the movement is limited by the limit pin 6-1. Once any end of the inner cavity of the limit slot 6 touches the limit pin 6-1, it indicates that the draw plate 4 moves to the preset position, and the switching cylinder 3 stops. In this embodiment, the sliding distance d4 of the limit slot 6 is 20 mm.

Claims

1. A switchable punch structure, comprising: The punching punch, the punch fixing plate and the upper die seat are characterized in that they also include: a conversion structure; The conversion structure includes: a switching cylinder, a draw plate, a force transmission cushion column and a yielding hole; The switching cylinder is fixed on the upper die seat, and the stroke direction of the output shaft of the switching cylinder is perpendicular to the stamping stroke direction of the punching punch; the draw plate is slidably mounted on the upper die seat; the output shaft of the switching cylinder is connected to one end of the draw plate, and the other end of the draw plate is provided with the yield hole on the side wall adjacent to the punching punch; One end of the force transmission pad column is connected to the punching punch, and the other end is set as a yielding end head, and the yielding end head is adapted to the shape and size of the yielding hole; the punching punch and the force transmission pad column are perpendicular to the drawing plate, and are slidably installed between the drawing plate and the punching die, and the stamping stroke trajectory line of the punching punch has an intersection with the sliding trajectory of the yielding hole.

2. A switchable punch structure according to claim 1, characterized in that: It also includes: a punch pressing plate and a reset slide; The punch pressing plate is based on the punch fixing plate, and the reset groove is opened on the side wall of the punching punch; one end of the punch pressing plate extends into the reset groove; the reset groove is arranged along the punching direction of the punching punch, and the distance between the side of the reset groove adjacent to the draw plate and the draw plate ensures that the force transmission pad column is pressed against the draw plate; the length of the reset groove is greater than or equal to the depth of the give way hole.

3. A switchable punch structure according to claim 1, characterized in that: It also includes: a limiting slide groove and a limiting pin; A limiting slide groove is arranged on the draw plate along the sliding direction of the yield hole, the limiting pin is arranged on the upper die seat, and the top end of the limiting pin is arranged in the limiting slide groove; the length of the limiting slide groove is the preset sliding distance of the draw plate.

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