An elastic material pressing punch realizes a rigid material punching structure

Abstract

The utility model discloses a rigid punching structure for elastic material pressing, and relates to the relevant technical field of stamping. The utility model includes a punch, a punch seat, a die, a die fixing block and a stripping plate, wherein the punch is fixed below the punch seat, the die is connected to the die fixing block through a pad, a positioning plate for positioning the punching sheet is provided at the center of the upper surface of the die, a sliding bin is provided in the punch seat, a push plate is slidably connected in the sliding bin, a stripping plate is fixed below the push plate through more than one long stripping screw, a polyurethane elastomer is matched above the push plate and the top of the sliding bin, and a stripping head on the punch passes through the stripping plate and is slidably connected to the stripping plate, an electromagnet is provided at the bottom of the stripping plate, a punch stroke switch electrically connected to the electromagnet is fixed below the punch seat, and a die cavity matched with the stripping head is provided on the die. The structure can realize rapid stripping and improve work efficiency while ensuring elastic stamping.

Description

Technical Field

[0001] The utility model belongs to the technical field related to composite punching, and particularly relates to a rigid punching structure realized by elastic material pressing. Background Art

[0002] In terms of the form of the stamping structure of the composite stamping die, it is generally divided into two types of stamping structures: elastic material pressing and rigid material punching. The two structures have their own advantages and disadvantages. The product punched out by the elastic material pressing structure (i.e., elastic die stamping) has good flatness, less deformation of the punching sheet, and more stable size. However, the punched sheet is always pressed on the surface of the lower die, which makes it more troublesome to take the material and the stamping efficiency is low. With the rigid material punching structure, after stamping, the punching sheet is brought to the upper die and needs to be knocked down by the punching rod in the rigid punching device of the press (i.e., the rigid punching device of the press disclosed in patent No. 2008200395326). The punching sheet can be taken down later by a robot or manually. Relatively speaking, the stamping efficiency is high and it is more suitable for automated production. The corresponding disadvantage is that the product punched out has a large deformation and relatively poor flatness. Therefore, how to design a stamping die that can elastically press the product line and then perform rigid stamping, and can lift the punching sheet after stamping to facilitate material removal is particularly important. Utility Model Content

[0003] The utility model aims to provide an elastic material pressing punch to realize a rigid material punching structure, which solves the problems of difficult material removal in the existing elastic punching structure and easy deformation of products after punching in the rigid punching structure.

[0004] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0005] The utility model is an elastic material pressing punch realizing a rigid punching structure, comprising a punch, a punch seat, a die, a die fixing block and a stripping plate, wherein the punch is fixed below the punch seat, the die is connected to the die fixing block through a pad, a positioning plate for positioning a punching sheet is arranged at the center of the upper surface of the die, a sliding bin is arranged in the punch seat, a push plate is slidably connected in the sliding bin, the stripping plate is fixed below the push plate through more than one long stripping screw, a polyurethane elastomer is matched above the push plate and the top of the sliding bin, and a stripping head on the punch passes through the stripping plate and is slidably connected to the stripping plate, an electromagnet is arranged at the bottom of the stripping plate, a punch stroke switch electrically connected to the electromagnet is fixed below the punch seat, the punch stroke switch is used to control the electromagnet to be energized or de-energized, and a die cavity matched with the stripping head is arranged on the die.

[0006] Preferably, in order to improve the connection strength, a punch fixing plate is provided between the punch seat and the punch, a polyurethane elastomer 2 is provided between the bottom of the punch and the unloading plate, the punch seat is connected to the punch through a locking screw 4, the locking screw 4 is sequentially connected to the punch seat, the punch fixing plate and then the punch threaded connection, and a locking screw 5 is also connected between the punch fixing plate and the punch.

[0007] Preferably, in order to achieve a guiding effect and avoid position displacement during movement, a guide rod is provided in the sliding bin, a countersunk hole 1 is provided in the guide rod, the countersunk hole 1 is threadedly connected to the punch seat through a locking screw 1, and the guide rod is slidably connected to the push plate.

[0008] Preferably, in order to facilitate disassembly, the positioning plate is fixed to the cushion block by locking screw 2, and an avoidance groove cooperating with the positioning plate is provided at the bottom of the unloading plate.

[0009] Preferably, in order to fix the positioning plate, a boss is provided below the positioning plate, and a limiting groove cooperating with the boss is provided at the center of the die.

[0010] Preferably, in order to facilitate disassembly, a locking screw three is provided on the unloading plate, and the locking screw three is threadedly connected with the electromagnet after being inserted into the unloading plate.

[0011] Preferably, in order to improve the magnetic attraction force of the punch sheet, a metal protective cover is provided on the outer side of the electromagnet, the bottom surface of the metal protective cover is flush with the bottom surface of the electromagnet, and the locking screw three passes through the metal protective cover and is threadedly connected to the electromagnet, and an insulating sleeve is provided on the metal protective cover and is covered on the locking screw three.

[0012] The utility model has the following beneficial effects: in the process of stamping with elastic pressing material, the structure can also realize the purpose of rigid punching after the later stamping is completed to allow the punching sheet to be quickly demolded by adding an electromagnet structure, and the use of elastic pressing material can ensure that the punched product has good flatness, less deformation of the punching sheet, and more stable size. At the same time, it also has the function of rigid punching to realize rapid material removal, improve work efficiency, and realize automated production. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a cross-sectional schematic diagram of a rigid punching structure realized by an elastic material pressing punch in Example 1;

[0014] Figure 2 for Figure 1 A magnified image of point A;

[0015] Figure 3 It is a schematic diagram of the structure of the punching sheet with the final punching shape;

[0016] Figure 4 It is a cross-sectional schematic diagram of a rigid punching structure realized by an elastic material pressing punch in Example 2;

[0017] Figure 5 for Figure 3 Enlarged view of point B.

[0018] Figure numerals: punch 1, demoulding head 101, punch seat 2, die 3, limiting groove 301, die cavity 302, die fixing block 4, cushion block 5, positioning plate 6, boss 601, positioning through hole 602, sliding bin 7, push plate 8, unloading plate 9, polyurethane elastomer 10, electromagnet 11, punch stroke switch 12, punch fixing plate 13, polyurethane elastomer 2 14, guide rod 15, countersunk hole 16, locking screw 1 17, locking screw 2 18, avoidance groove 19, locking screw 3 20, locking screw 4 21, locking screw 5 22, long unloading screw 23, metal protective cover 24, insulating sleeve 25. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example 1

[0020] See also Figure 1-2As shown, the elastic material pressing punch disclosed in the present embodiment realizes a rigid punching structure, including a punch 1, a punch seat 2, a die 3, a die fixing block 4 and a discharge plate 9, wherein the punch 1 is fixed below the punch seat 2, the die 3 is connected to the die fixing block 4 through a cushion block 5, a positioning plate 6 for positioning the punching sheet is arranged at the center of the upper surface of the die 3, a sliding bin 7 is arranged in the punch seat 2, a push plate 8 is slidably connected in the sliding bin 7, the discharge plate 9 is fixed below the push plate 8 through more than one long discharge screw 23, a polyurethane elastomer 10 is matched with the top of the sliding bin 7 above the push plate 8, The stripping head 101 on the punch 1 penetrates the stripping plate 9 and is slidably connected to the stripping plate 9. An electromagnet 11 is arranged at the bottom of the stripping plate 9. A punch stroke switch 12 electrically connected to the electromagnet 11 is fixed below the punch seat 2. The punch stroke switch 12 is used to control the electromagnet 11 to be energized or de-energized. A die cavity 302 cooperating with the stripping head 101 is arranged on the die 3. In this embodiment, there are four long stripping screws 23, which are respectively located on both sides of the push plate 8, namely, 2 on the left and 2 on the right. The long stripping screws 23 distributed in pairs are not symmetrically arranged with respect to the center line of the push plate 8, so Figure 1 During cross-section cutting, the two long unloading screws 23 on the right side cannot be seen.

[0021] Preferably, in order to improve the connection strength, a punch fixing plate 13 is provided between the punch seat 2 and the punch 1, a polyurethane elastomer 2 14 is provided between the bottom of the punch 1 and the unloading plate 9, the punch seat 2 is connected to the punch 1 through a locking screw 4 21, the locking screw 4 21 is threadedly connected to the punch seat 2 and the punch fixing plate 13 in turn, and a locking screw 5 22 is also connected between the punch fixing plate 13 and the punch 1. In this embodiment, there are two locking screws 4 21, which are respectively located on both sides of the punch seat 2, and the two locking screws 4 21 are not symmetrically arranged with respect to the center line of the punch seat 2, so Figure 1 When the cross section is cut, the locking screw 21 on the right side cannot be seen. Similarly, there are two locking screws 22, which are respectively located on both sides of the punch fixing plate 13, and the two locking screws 22 are not symmetrically arranged with respect to the center line of the punch fixing plate 13. Figure 1 During cross-section cutting, the locking screw 522 on the left side cannot be seen.

[0022] Preferably, in order to achieve a guiding effect and avoid positional deviation during movement, a guide rod 15 is provided in the sliding bin 7, and a countersunk hole 16 is provided in the guide rod 15. The countersunk hole 16 is threadedly connected to the punch seat 2 through a locking screw 17, and the guide rod 15 is slidably connected to the push plate 8. Through the setting of the above structure, a guide rod 15 is additionally provided, so that the push plate 8 can move up and down along the guide rod 15 when the mold is closed, so as to ensure that the problem of positional deviation during movement is avoided.

[0023] Preferably, in order to facilitate disassembly, the positioning plate 6 is fixed to the cushion block 5 by a locking screw 18, and an avoidance groove 19 cooperating with the positioning plate 6 is provided at the bottom of the unloading plate 9. The above-mentioned structural arrangement facilitates the disassembly of the positioning plate 6, and at the same time avoids the mold from being in place due to the raised structure of the positioning plate 6 during mold closing. An avoidance groove 19 is provided at the bottom of the unloading plate 9.

[0024] Preferably, in order to fix the positioning plate, a boss 601 is provided below the positioning plate 6, and a limiting groove 301 cooperating with the boss 601 is provided at the center of the die 3. In the above structure, a limiting groove 301 is provided at the center of the die 3 to fix the positioning plate 6.

[0025] As a preferred method, for easy disassembly, a locking screw 20 is provided on the stripper plate 9, and the locking screw 20 is threadedly connected with the electromagnet 11 after being inserted into the stripper plate 9. In this embodiment, in order to facilitate the magnetization of both sides of the punch, an electromagnet 11 is provided on both sides of the stripper plate 9. The two electromagnets 11 are not symmetrically arranged with respect to the center line of the stripper plate 9, so Figure 1 During cross-section cutting, the electromagnet 11 on the left cannot be seen. The two electromagnets 11 are respectively connected to the punch stroke switch 12 on the right through a wire, and the electromagnet 11 is fixed to the unloading plate 9 by a locking screw 20, so as to facilitate the later disassembly of the electromagnet 11 to quickly replace the damaged electromagnet 11.

[0026] This structure is a combination of polyurethane elastomer 10, polyurethane elastomer 2 14, long unloading screw 23, push plate 8, and unloading plate 9. During stamping, the elastic pressure acting on the unloading plate 9 compacts the punching piece before stamping. After stamping, the punch stroke switch 10 is energized to ensure that the electromagnet 11 has a strong magnetic attraction, and the punching piece is sucked and attached to the lower plane of the unloading plate 9. As the punch seat 2 rises to the dead point on the punch, the punch stroke switch 12 is powered off to ensure that the electromagnet 11 loses its strong magnetic attraction, so that the punching piece loses its attraction and falls from the lower surface of the unloading plate 9. Finally, the punching piece is taken away by the punching machine manipulator. Therefore, this structure can also have rigid and fast punching while using elastic pressure punching, thereby realizing the function of quickly dropping the punching piece.

[0027] This application needs to explain that

[0028] like Figure 3 As shown, the punch is a sheet structure, and a positioning through hole 602 for sleeved on the outside of the positioning plate 6 is set in the center of the punch. This positioning through hole 602 has been punched in the early stage. This structure is used for punching a punch with a positioning through hole 602 in the center, and the structure of the concave and convex molds needs to be the same as Figure 3 The dotted line part needs to be punched in the same position to ensure the stamping forming, and finally formed into the required stamping structure. The structure involved in the concave die and the convex die belongs to the conventional technology in this field, so it will not be described in detail. The working principle is as follows:

[0029] When using other accessories that need to cooperate with the punching die in this structure, first, the punch is positioned on the die 3 through the positioning plate 6 on the die, and the punch 1 is driven downward by the processing spindle. During stamping, the elastic pressure acting on the unloading plate 9 through the combined action of the polyurethane elastomer 10, the polyurethane elastomer 2 14, the long unloading screw 23, the push plate 8, and the unloading plate 9 compacts the punch and then performs stamping. The punch 1 continues to move downward for stamping. The punch will form the required structure according to the contour shape of the punch 1 and the die 3. After stamping, the punch stroke switch 12 is energized (the punch stroke switch 12 is previously connected to an external power supply) to ensure that the electromagnet 11 has a strong magnetic attraction after being energized, and the punch is sucked and attached to the lower plane of the unloading plate 9. After the stamping is completed, as the punch 1 It rises to the dead point on the punch press, and then the punch press stroke switch 12 is powered off to ensure that the electromagnet 11 loses its strong magnetic attraction, so that the punching sheet loses its attraction and falls from the lower plane of the unloading plate 9. Finally, the punching sheet is taken away by the punch press manipulator. In the process of stamping with elastic pressing material, the structure also adds the structure of the electromagnet 11 (instead of the rigid punching rod) to achieve the purpose of rigid punching to allow the punching sheet to be quickly demolded after the later stamping is completed. The use of elastic pressing material can ensure that the punched product has a better flatness, less deformation of the punching sheet, and a more stable size. At the same time, it also has the function of rigid punching to achieve rapid material removal, improve work efficiency, and realize automated production. Example 2

[0030] See also Figure 4-5As shown, an elastic pressing punch disclosed in this embodiment realizes a rigid punching structure. Preferably, in order to improve the magnetic attraction force of the punching sheet, a metal protective cover 24 is provided on the outer side of the electromagnet 11, and the bottom surface of the metal protective cover 24 is flush with the bottom surface of the electromagnet 11, and the locking screw three 20 passes through the metal protective cover 24 and is threadedly connected to the electromagnet 11, and an insulating sleeve 25 is provided on the metal protective cover 24 and is sleeved on the locking screw three 20. This structure can not only protect the electromagnet 11 by sleeveing ​​a metal protective cover 24 on the metal protective cover 24, but also increase the magnetic attraction area at the bottom of the electromagnet 11, thereby ultimately improving the suction force on the product and further improving the fixing effect of the punching sheet.

[0031] The above are only preferred embodiments of the present invention and do not limit the present invention. Any modification to the technical solutions recorded in the aforementioned embodiments and any equivalent replacement of some of the technical features therein, any modification, equivalent replacement, and improvement made are all within the protection scope of the present invention.

Claims

1. An elastic material pressing punch realizing a rigid punching structure, comprising a punch (1), a punch seat (2), a die (3), a die fixing block (4) and a discharge plate (9), wherein the punch (1) is fixed below the punch seat (2), and the die (3) is connected to the die fixing block (4) via a cushion block (5), and is characterized in that: A positioning plate (6) for positioning the punch is arranged at the center of the upper surface of the die (3), a sliding bin (7) is arranged in the punch seat (2), a push plate (8) is slidably connected in the sliding bin (7), the stripping plate (9) is fixed below the push plate (8) by one or more long stripping screws (23), a polyurethane elastomer (10) is matched above the push plate (8) and the top of the sliding bin (7), and a stripping head (101) on the punch (1) penetrates the stripping plate (9) and is slidably connected to the stripping plate (9), an electromagnet (11) is arranged at the bottom of the stripping plate (9), a punch stroke switch (12) electrically connected to the electromagnet (11) is fixed below the punch seat (2), and the punch stroke switch (12) is used to control the electromagnet (11) to be energized or de-energized, and a die cavity (302) matched with the stripping head (101) is arranged on the die (3).

2. The elastic material pressing and punching rigid material punching structure according to claim 1 is characterized in that: A punch fixing plate (13) is provided between the punch seat (2) and the punch (1), a polyurethane elastomer 2 (14) is provided between the bottom of the punch (1) and the discharge plate (9), the punch seat (2) is connected to the punch (1) via a locking screw 4 (21), the locking screw 4 (21) is threadedly connected to the punch seat (2), the punch fixing plate (13) and the punch (1) in sequence, and a locking screw 5 (22) is also connected between the punch fixing plate (13) and the punch (1).

3. The elastic material pressing and punching rigid material punching structure according to claim 1 or 2, characterized in that: A guide rod (15) is provided in the sliding bin (7), a countersunk hole (16) is provided in the guide rod (15), the countersunk hole (16) is threadedly connected to the punch seat (2) via a locking screw (17), and the guide rod (15) is slidably connected to the push plate (8).

4. The elastic material pressing and punching rigid material punching structure according to claim 1 is characterized in that: The positioning plate (6) is fixed to the cushion block (5) by means of a second locking screw (18), and an avoidance groove (19) cooperating with the positioning plate (6) is provided at the bottom of the discharge plate (9).

5. The elastic material pressing and punching rigid material punching structure according to claim 4 is characterized in that: A boss (601) is provided below the positioning plate (6), and a limiting groove (301) cooperating with the boss (601) is provided at the center of the female mold (3).

6. The elastic material pressing and punching rigid material punching structure according to claim 1, characterized in that: A locking screw three (20) is provided on the discharge plate (9), and the locking screw three (20) is inserted into the discharge plate (9) and is threadedly connected to the electromagnet (11).

7. The elastic material pressing and punching rigid material punching structure according to claim 6 is characterized in that: A metal protective cover (24) is arranged on the outer side of the electromagnet (11), the bottom surface of the metal protective cover (24) is flush with the bottom surface of the electromagnet (11), and the locking screw (20) passes through the metal protective cover (24) and is threadedly connected to the electromagnet (11), and an insulating sleeve (25) is arranged on the metal protective cover (24) and is sleeved outside the locking screw (20).

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