Side punching die for punching concentric bolt holes

Abstract

The utility model discloses a lateral punching die for punching concentric bolt holes, which relates to the field of lateral punching dies, and comprises an upper die and a lower die which are movably connected through a guide pillar, the lateral punching die is of a bilaterally symmetrical structure, the upper die comprises an upper template, a tool bit and a tool bit fixing plate, the tool bit and the tool bit fixing plate are fixedly connected with the middle of the upper template, and the lower die is of a bilaterally symmetrical structure. The lower die comprises a lower die base, two punching needle fixing bases opposite to the tool bits of the upper die in position and punching needles located between the punching needle fixing bases, reset springs are installed on the lower end faces of the punching needle fixing bases, and the outer sides of the lower end faces of the punching needle fixing bases are rotationally connected to the lower die fixing plate through rotating shafts; the rotating shaft is mounted on the lower die fixing plate through a rotating shaft positioning plate; and the lower die fixing plate is fixed on the lower die plate. According to the side punching die, the working efficiency is improved through one procedure, the reject ratio of products caused by punching before forming is effectively avoided, the labor cost is reduced, and the transfer management cost is also reduced; and the mold is convenient and fast to adjust.

Description

Technical Field

[0001] The utility model relates to the field of lateral punching dies, in particular to a lateral punching die used for punching concentric bolt holes. Background Art

[0002] Shelf column protection devices with bolt holes on both sides are widely used in storage supplies. Since the function of this type of product is to protect the shelf columns, its shape needs to be designed as a U-shape. In order to connect with the column, bolt holes are set at the two side positions of the U-shape. In order to be tightly assembled with the shelf columns, the bolt holes on both sides need to have certain concentricity requirements. In the prior art, the processing technology of this product is to punch holes when the workpiece raw material is a flat plate, mark and punch holes twice in advance, and then perform stamping and forming operations. In this way, due to stamping errors and punching position errors, it is very easy to cause the concentricity of the bolt holes on both sides after forming to be too low, which cannot meet the assembly requirements. Utility Model Content

[0003] The utility model aims to provide a die for punching concentric bolt holes on both sides of a product, so as to solve the problems mentioned in the background technology.

[0004] In order to solve the above problems, the technical solution adopted is: a side punching die for punching concentric bolt holes, which is composed of an upper die and a lower die movably connected by a guide column, and is a bilaterally symmetrical structure. The upper die includes an upper die plate, a cutter head fixedly connected in the middle of the upper die plate, and a cutter head fixing plate. The lower die includes two punch pin fixing seats opposite to the cutter head and a punch pin installed in the middle. A reset spring is installed on the lower end surface of the punch pin fixing seat, and the punch pin fixing seat is rotatably connected to the lower die fixing plate through a rotating shaft on the outer side of its lower end surface. The rotating shaft is fixed in the lower die fixing plate through a rotating shaft positioning plate; the lower die fixing plate is fixed on the lower die plate.

[0005] In order to better position the workpiece, L-shaped workpiece positioning plates are provided on the left and right sides of the workpiece to be punched. Specifically, a blind hole is opened on each side of the cutter head, and the first cylindrical pin inserted in the blind hole connects the workpiece positioning plate and the cutter head.

[0006] Specifically, the rotating shaft is rotatably connected to the rotating shaft positioning plate through a second cylindrical pin, and the rotating shaft positioning plate is connected to the lower mold fixing plate through bolts; the lower mold fixing plate is processed into an arc shape that matches the rotating shaft, and the rotating shaft is placed in the arc-shaped structure that imitates the lower mold fixing plate.

[0007] Specifically, the front end of the second cylindrical pin is threaded and the rear part is a smooth part; the second cylindrical pin is threadedly connected to the rotating shaft, and the rotating shaft can drive the second cylindrical pin to rotate; the rotating shaft positioning plate and the rotating shaft are connected by a clearance fit through the smooth part of the second cylindrical pin.

[0008] Compared with the prior art, the beneficial effects of the utility model are:

[0009] This side punching die improves work efficiency through one process, effectively avoiding the defective rate of products caused by punching before forming, and can also reduce labor costs and transportation management costs; and the mold can be adjusted conveniently and quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is an overall structural diagram of an embodiment of the utility model;

[0011] Figure 2 This is a left view of the die when punching holes in the embodiment of the utility model;

[0012] Figure 3 This is a structural diagram of the lower mold of an embodiment of the utility model;

[0013] Figure 4 A top view of the rotating shaft connection structure of an embodiment of the utility model;

[0014] Figure 5-1 This is a front view of a workpiece positioning support plate according to an embodiment of the utility model;

[0015] Figure 5-2 It is a left side view of the workpiece positioning support plate of the embodiment of the utility model;

[0016] Figure 6 This is a state diagram of the workpiece positioning support plate when taking and placing the workpiece in the embodiment of the utility model;

[0017] Figure 7 This is a front view of the die when punching holes in the embodiment of the utility model;

[0018] Figure 8-1 It is a front view of the product of the embodiment of the utility model;

[0019] Figure 8-2 It is a left side view of the product of the embodiment of the utility model;

[0020] Figure 8-3 It is a top view of the product of the embodiment of the utility model.

[0021] Markings in the figure: 1. upper template, 2. guide column, 3. lower template, 4. cutter head, 5. cutter head fixing plate, 6. punch pin fixing seat, 7. punch pin, 8. lower mold fixing plate, 9. rotating shaft, 10. return spring, 11. rotating shaft positioning plate, 12. first cylindrical pin, 13. workpiece to be punched, 14. fastening bolt, 15. workpiece positioning support plate, 16. second cylindrical pin. DETAILED DESCRIPTION

[0022] The present invention will be further explained and illustrated below in conjunction with the accompanying drawings and embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0023] Example: See Figure 1-Figure 3 A side punching die for punching concentric bolt holes, composed of an upper die and a lower die movably connected by a guide column 2, and having a bilaterally symmetrical structure, wherein the upper die comprises an upper die plate 1, a cutter head 4 and a cutter head fixing plate 5 installed in the middle of the upper die plate, and the lower die comprises a lower die fixing plate 8, two punch needle fixing seats 6 opposite to the cutter head 4 and a punch needle 7 installed in the middle thereof, a return spring 10 is installed on the lower end surface of the punch needle fixing seat 6, and the punch needle fixing seat 6 is rotatably connected to the lower die fixing plate 8 through a rotating shaft 9 on the outer side of its lower end surface; the rotating shaft 9 is fixed in the lower die fixing plate 8 through a rotating shaft positioning plate 11, and the rotating shaft 9 is rotatably connected to the rotating shaft positioning plate 11 through a second cylindrical pin 16, and the rotating shaft positioning plate 11 is connected to the lower die fixing plate 8 through a fastening bolt 14.

[0024] like Figure 4 As shown, the front end of the second cylindrical pin 16 is threaded, and the rear part is a smooth part, the threaded part is fixedly connected to the shaft 9, and when the shaft 9 rotates, the shaft 9 drives the second cylindrical pin 16 to rotate. The smooth part is connected with the shaft positioning plate 11 with clearance fit, and when the shaft 9 rotates, the shaft positioning plate 11 is fixed.

[0025] See also Figure 5-1 , Figure 5-2 and Figure 7 In order to better position the workpiece, an L-shaped workpiece positioning support plate 15 is provided on the left and right sides of the workpiece. Specifically, a blind hole is opened on each side of the cutter head 4, and a first cylindrical pin 12 inserted into the blind hole connects the workpiece positioning support plate 15 and the cutter head 4.

[0026] like Figure 6 As shown, the workpiece can be placed and picked up by simply rotating the workpiece positioning support plate 15 upward by 90 degrees when the cutter head 4 is lifted.

[0027] When working, first rotate the workpiece positioning support plate 15 upward by 90 degrees in the mold opening state, and then place the workpiece 13 to be punched on the punch pin holder 6; then control the upper mold to move downward, and when the cutter head 4 contacts the workpiece 13 to be punched, reset the workpiece positioning support plate 15; the upper mold continues to move downward, and its downward force can drive the punch pin holder 6 to rotate inward around the rotating shaft 9 to complete the punching action; then the upper mold moves upward, and then rotates the workpiece positioning support plate 15 upward by 90 degrees to remove the workpiece. At this time, the punch pin holder 6 drives the punch pin 7 to reset under the action of the reset spring 10.

[0028] Figure 8-1 , Figure 8-2 and Figure 8-3 They are respectively a front view, a left view and a top view of the punching product of the utility model.

[0029] The term "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not expressly listed or that are inherent to such process, method, article, or apparatus.

[0030] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary, but not restrictive, and the scope of the present invention is defined by the appended claims rather than the above explanations and descriptions, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. At the same time, any figure mark in the claims should not be regarded as limiting the claims involved.

Claims

1. A side punching die for punching concentric bolt holes, comprising an upper die and a lower die movably connected by a guide column (2), characterized in that: The side punching die is a bilaterally symmetrical structure, the upper die comprises an upper die plate (1), a cutter head (4) fixedly connected in the middle of the upper die plate (1) and a cutter head fixing plate (5), the lower die comprises a lower die fixing plate (8), two punch needle fixing seats (6) opposite to the cutter head (4) of the upper die, and a punch needle (7) located in the middle of the punch needle fixing seats (6), a return spring (10) is installed on the lower end surface of the punch needle fixing seat (6), and the punch needle fixing seat (6) is rotatably connected to the lower die fixing plate (8) through a rotating shaft (9) on the outer side of its lower end surface; the rotating shaft (9) is fixed in the lower die fixing plate (8) through a rotating shaft positioning plate (11); the lower die fixing plate (8) is fixed on the lower die plate (3); L-shaped workpiece positioning plates (15) are arranged on the left and right sides of the workpiece (13) to be punched. Specifically, a blind hole is opened on the left and right sides of the cutter head (4), and a first cylindrical pin (12) is inserted into the blind hole to connect the workpiece positioning plate (15) and the cutter head (4).

2. A side punching die for punching concentric bolt holes according to claim 1, characterized in that: The rotating shaft (9) is rotatably connected to the rotating shaft positioning plate (11) via a second cylindrical pin (16), and the rotating shaft positioning plate (11) is connected to the lower die fixing plate (8) via bolts; the lower die fixing plate (8) is processed into an arc shape matching the rotating shaft (9), and the rotating shaft (9) is placed in the arc-shaped structure of the lower die fixing plate (8).

3. A side punching die for punching concentric bolt holes according to claim 2, characterized in that: The front end of the second cylindrical pin (16) is threaded, and the rear end is a smooth surface part; the second cylindrical pin (16) is threadedly connected to the rotating shaft (9), and the rotating shaft (9) can drive the second cylindrical pin (16) to rotate; the rotating shaft positioning plate (11) and the rotating shaft (9) are connected by a clearance fit through the smooth surface part of the second cylindrical pin (16).

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