One-step forming die for knock-off hole

Abstract

The utility model provides a knock-off hole one-time forming die, and relates to the technical field of metal material forming. The punch is fixedly connected to the bottom end of the upper die body; a discharging channel is formed in the lower die base; one end of each spring is fixedly connected to the surface of the top of the lower die base; the lower die plate is located on the springs, the other ends of the springs are fixedly connected with the surface of the bottom of the lower die plate, and a punching groove is formed in the lower die plate; the discharging channel is located in the lower die base; the punching groove is located in the lower die plate, a forming column is arranged in the punching groove, two through holes communicated with the discharging channel are formed in the punching groove, and the number of the through holes is two; and the forming column is arranged between the two symmetrical through holes, and compared with the prior art, the reject ratio of the one-time forming die can be reduced by more than 75%.

Description

Technical Field

[0001] The utility model relates to the technical field of metal material forming, in particular to a one-step forming die for knock-out holes. Background Art

[0002] Knock-out holes refer to holes in metal stamping parts where the object inside the hole seems to have fallen out but is not. The object can be removed by tapping the hole lightly with a screwdriver or other tool, revealing a through hole. The conventional production process in the existing knock-out hole production technology is generally divided into two steps, namely, first cutting the knock-out hole and its shape with a laser machine, and then machining the mesh with a CNC machine and other processes to complete the production. This existing secondary processing production process consumes a lot of time and labor, and its efficiency and cost will be greatly increased. In addition, the defective rate of products will also increase dynamically during laser cutting, CNC stamping and manual operations.

[0003] When using existing technology to process laser machines to cut products, equipment hardware problems such as burrs, slag or uncut parts may occasionally occur. In addition, scratches and falling are prone to occur during manual operations of moving plates. In addition, due to the large size of the materials, employees may suffer cuts, bruises, improper operation and other uncertain work-related injuries during operation. Utility Model Content

[0004] The purpose of the utility model is to overcome the defects of the existing production process and provide a one-step forming die for knock-out holes, which is used to solve the problems of complicated process and low efficiency in the prior art, so as to achieve the process purpose of integrating knock-out hole forming and punching.

[0005] In order to achieve the above purpose and other purposes, the utility model is implemented by including the following technical solutions: The utility model provides a knock-out hole one-time forming mold, and the knock-out hole one-time forming mold includes:

[0006] Upper mold body;

[0007] A punch, the punch being fixedly connected to the bottom end of the upper die body;

[0008] A lower die base, wherein a discharge channel is provided in the lower die base;

[0009] A plurality of springs, one end of each of the plurality of springs being fixedly connected to the top surface of the lower mold base;

[0010] The lower template is located on the multiple springs, the other ends of the multiple springs are fixedly connected to the bottom surface of the lower template, a punching groove is arranged in the lower template, and a through hole communicating with the discharge channel is arranged in the punching groove.

[0011] In one embodiment, the cross-sectional shape of the punch is not closed, and the cross-sectional shape includes an open circle, square, ellipse or ring.

[0012] In one embodiment, the cross-sectional shape of the through hole is the same as the cross-sectional shape of the punch.

[0013] In one embodiment, the plurality of springs are distributed on a circumferential edge of the lower template.

[0014] In one embodiment, the through holes are two symmetrical through holes.

[0015] In one embodiment, a forming column is disposed in the punching slot, and the forming column is disposed between the two symmetrical through holes.

[0016] In one embodiment, the through hole and the punch match each other.

[0017] The utility model provides a one-time forming mold for knock-out holes. Compared with the prior art, the utility model has the following beneficial effects: the one-time forming mold described in the utility model can improve product quality and employee personal safety, simplify processing technology, reduce costs, and improve mass production performance. Its defective rate can be reduced by more than 75% compared with the prior art. At the same time, this mold can be customized according to the size of knock-out holes of other shapes, process products of different sizes, and realize diversified production. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of a one-step forming mold in one embodiment of the utility model.

[0019] Figure 2 It is a schematic diagram of the structure of the upper mold in one embodiment of the utility model.

[0020] Figure 3 Shown is a bottom view of an upper mold in one embodiment of the present utility model.

[0021] Figure 4 Shown is a cross-sectional view of a lower mold in one embodiment of the present utility model.

[0022] Figure 5 Shown is a top view of a punching slot in an embodiment of the present invention.

[0023] Figure 6 Shown is a schematic diagram of the specifications of the knock-out hole in one embodiment of the utility model.

[0024] In the figure: 1-upper die, 2-lower die, 11-upper die body, 12-punch, 21-lower die plate, 22-plurality of springs, 23-lower die base, 24-forming column, 25-punching slot, 26-discharge channel, 27-through hole, 100-metal material. DETAILED DESCRIPTION

[0025] See also Figures 1 to 6The following describes the implementation of the present invention through specific examples. Those skilled in the art of the present invention can easily understand other advantages and functions of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0026] like Figure 1 As shown, the utility model provides a one-time forming mold for a knock-out hole, and the one-time forming mold is a one-time forming mold that can combine an adjustable knock-out hole mold and a punching mold, and the upper mold and the lower mold simultaneously include two parts of processing features of knock-out hole shape forming and punching. The one-time forming mold can integrate the two processing features of knock-out hole forming and punching, and also can customize the mold according to the size of knock-out holes of other shapes to process knock-out holes of different sizes.

[0027] like Figures 1 to 5 As shown, in one embodiment, the one-time forming mold is installed as a whole on a stamping machine, and the overall structure of the one-time forming mold includes an upper mold 1 and a lower mold 2, the upper mold 1 is located above the lower mold 2, the upper mold 1 includes an upper mold body 11 and a punch 12, and the lower mold 2 includes a lower mold plate 21, multiple springs 22, a lower mold base 23, a forming column 24, a punching groove 25, a discharge channel 26, and a through hole 27.

[0028] like Figure 1 As shown, in one embodiment, the overall structure of the one-time molding mold includes an upper mold 1 and a lower mold 2, the upper mold 1 includes an upper mold body 11, the cross-section of the upper mold body 11 can be circular, the upper mold 1 also includes a punch 12, the punch 12 is fixedly connected to the bottom end of the upper mold body 11, the cross-sectional shape of the punch 12 is not closed, and the shape of the cross-section includes an open circle, square, ellipse or ring, the lower mold 2 includes a lower mold plate 21, the bottom surface of the lower mold plate 21 is fixedly connected to one end of a plurality of springs 22, the plurality of springs 22 are distributed on the circumferential edge of the lower mold plate 21, and the other end of the plurality of springs 22 is fixedly connected to the top surface of the lower mold base 23.

[0029] like Figure 4As shown, in one embodiment, the lower die 2 also includes a forming column 24, and the forming column 24 is arranged in a punching groove 25. A through hole 27 is arranged in the punching groove 25. The through hole 27 is two symmetrical through holes. The forming column 24 is arranged between the two symmetrical through holes. The forming column 24 is mainly used to help position the punch 12 to ensure that the punch 12 does not shift during punching. The punching groove 25 is arranged in the lower template 21, and a discharge channel 26 is opened in the lower die base 23.

[0030] like Figure 5 As shown, in some embodiments, the punching groove 25 includes a forming column 24, and a through hole 27 communicating with the discharge channel 26 is arranged in the punching groove 25, and the cross-sectional shape of the through hole 27 is the same as the cross-sectional shape of the punch 12, and the through hole 27 can be matched with the punch 12 to form the knock-out hole.

[0031] like Figure 6 As shown, in some embodiments, the specifications of the knock-out hole are: the total length L is 45.00 mm, the total width D is 30.00 mm, the allowable deviation range is within ±0.05 mm, the outer radius R of the semicircle is 15.00 mm, the inner radius r of the semicircle is 13.00 mm, the hole mouth should be round and straight, without burrs, cracks and deformation, the roundness deviation should be within 0.02 mm, the side length a of the knock-out point is 2.00 mm, the surface of the stamped knock-out hole should be smooth, without scratches, pits and unevenness, and there should be no obvious deformation, cracks or plastic flow in the area around the hole.

[0032] like Figure 1 As shown, the carrier of the knockout hole of the utility model is a metal material 100, and the metal material 100 refers to metal formed into a thin, flat sheet, namely a metal plate, by an industrial method. Sheet metal is one of the basic forms used in metal processing, and it can be cut and bent into various shapes. There are many different metals that can be made into metal plates, such as aluminum, brass, copper, steel, tin, nickel and titanium, and some important metals for decorative purposes include silver, gold, and platinum. These metal plates can be used in medical, construction, automobile manufacturing and the metal material forming field in this embodiment. The forming processes of the metal plate include laser cutting, photochemical processing and perforation. Stamping knockout holes is a common metal processing method used to form circular or non-circular recessed holes on plates or parts.

[0033] The forming principle of the knock-out hole of the utility model can be exemplified as follows:

[0034] like Figures 1 to 5As shown, when the upper die body 11 punches the metal material 100 downward under the action of the machine tool, the punch 12 moves downward, and the lower die plate 21 is subjected to the pressure formed by the upper die body 11 punching the metal material 100. Under the action of the pressure, the multiple springs 22 contract, and the punch 12 and the punching slot 25 interact to form a knock-out hole shape on the metal material 100. After the metal material 100 has completed the shape forming, the upper die body 11 and the punch 12 continue to move downward, and the punch 12 and the punching slot 25 squeeze each other to further punch the metal material 100. The waste generated during the punching enters the discharge channel 26 through the through hole 27 in the punching slot 25, and finally the waste generated during the punching is discharged through the discharge channel 26, thereby achieving the process purpose of knock-out hole forming and punching integration.

[0035] Therefore, the utility model effectively overcomes various shortcomings in the prior art and has a high industrial utilization value. The above embodiments are only illustrative of the principle and effect of the utility model, and are not used to limit the utility model. Anyone familiar with this technology can modify or change the above embodiments without violating the spirit and scope of the utility model. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the relevant technical field without departing from the spirit and technical ideas disclosed by the utility model should still be covered by the claims of the utility model.

Claims

1. A one-step forming die for a knock-out hole, characterized in that: The primary molding die comprises: Upper mold body; A punch, the punch being fixedly connected to the bottom end of the upper die body; A lower die base, wherein a discharge channel is provided in the lower die base; A plurality of springs, one end of each of the plurality of springs being fixedly connected to the top surface of the lower mold base; The lower template is located on the multiple springs, the other ends of the multiple springs are fixedly connected to the bottom surface of the lower template, a punching groove is arranged in the lower template, and a through hole communicating with the discharge channel is arranged in the punching groove.

2. The one-shot molding die according to claim 1, characterized in that: The cross-sectional shape of the punch is not closed, and the cross-sectional shape includes an open circle, square, ellipse or ring.

3. The one-shot molding die according to claim 1, characterized in that: The cross-sectional shape of the through hole is the same as the cross-sectional shape of the punch.

4. The one-shot molding die according to claim 1, characterized in that: The plurality of springs are distributed on the circumferential edge of the lower template.

5. The one-shot molding die according to claim 1, characterized in that: The through holes are two symmetrical through holes.

6. The one-shot molding die according to claim 5, characterized in that: A forming column is arranged in the punching slot, and the forming column is arranged between the two symmetrical through holes.

7. The one-shot molding die according to claim 1, characterized in that: The through hole and the punch match each other.

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