阅读说明：本技术 一种钢壳去除毛刺的冲孔方法 (Punching method for deburring steel shell ) 是由 黄亮 王勇 李玉强 于 2021-07-27 设计创作，主要内容包括：本发明提供一种钢壳去除毛刺的冲孔方法,依次包括以下步骤：S1、预冲孔,在钢壳上预冲中间孔,该中间孔的边缘与预期最终成孔的边缘距离在预定范围内；S2、反冲,采用与所述预期最终成孔尺寸相对应的冲头,对所述钢壳上的预期最终成孔位置进行冲压,使得所述钢壳上中间孔的边缘与预期最终成孔的边缘区域和所述钢壳预期最终成孔的边缘外部区域形成台阶；S3、正冲,对所述钢壳上的预期最终成孔位置进行冲压,该冲压方向与所述反冲的冲压方向相反,冲断所述钢壳上中间孔的边缘与预期最终成孔的边缘区域；本发明钢壳最终成孔内缘减少了大量的毛刺,甚至不存在毛刺,省时省力,节约了无毛刺冲孔的成本。(The invention provides a punching method for deburring a steel shell, which sequentially comprises the following steps of: s1, pre-punching, namely pre-punching a middle hole on the steel shell, wherein the distance between the edge of the middle hole and the edge of the expected final hole is in a preset range; s2, performing recoil, namely punching a position of an expected final hole forming position on the steel shell by using a punch head corresponding to the expected final hole forming size, so that the edge of the middle hole on the steel shell forms a step with the edge area of the expected final hole forming position and the outer area of the edge of the expected final hole forming position of the steel shell; s3, punching the expected final hole forming position on the steel shell by positive punching, wherein the punching direction is opposite to the punching direction of the back punching, and the edge of the middle hole on the steel shell and the edge area of the expected final hole forming are punched; the final hole forming inner edge of the steel shell reduces a large amount of burrs, even has no burrs, saves time and labor, and saves the cost of burr-free punching.)

1. A punching method for deburring a steel shell is characterized in that: the method sequentially comprises the following steps: s1, pre-punching, namely pre-punching a middle hole on the steel shell (400), wherein the distance between the edge of the middle hole and the edge of the expected final hole is in a preset range; s2, performing recoil, namely punching a position, where final hole forming is expected, on the steel shell (400) by using a recoil punch (200) corresponding to the size of the final hole forming, so that the edge of the middle hole on the steel shell (400) forms a step with the edge area where final hole forming is expected and the outer area of the edge where final hole forming is expected on the steel shell (400); and S3, positively punching, namely punching the expected final hole forming position on the steel shell (400) by using a positive punching head (300) corresponding to the expected final hole forming size, wherein the punching direction is opposite to the punching direction of the back punching, and the edge of the middle hole on the steel shell and the edge area of the expected final hole forming are punched to form the final hole forming.

2. A steel shell deburring punching method according to claim 1, wherein said predetermined range in step S1 is 0-1 mm.

3. A punching method for deburring of steel shells according to claim 1, wherein in steps S2 and S3, the punching force of said positive punching and the punching force of said back punching are equal in magnitude.

Technical Field

The invention relates to the field of punching, in particular to a punching method for removing burrs of a steel shell.

Background

The new energy industry is continuously developed, and domestic electric automobiles are rapidly developed. In the development of electric automobiles, the technical requirements on energy storage components are higher and higher, the control of burrs of punched holes on the surfaces of the energy storage components is particularly important, internal circuit short circuits or point discharge is easily caused by the problem of the burrs, and great potential safety hazards exist. The method is particularly important for controlling the surface and burrs in the production process of parts.

In the prior art, in the processing process of the steel shell, a plurality of processes of blanking, continuous stretching for a plurality of times, punching, shaping and waste cutting are sequentially needed to form a finished product. In the punching process, because burrs need to be removed, a fine punching machine is often used for punching the steel shell, the cost is high, and the production cost of related products is directly increased.

Disclosure of Invention

In view of the above-mentioned shortcomings of the prior art, the present invention provides a simple and convenient punching method capable of effectively eliminating burrs.

The invention provides a punching method for deburring a steel shell, which sequentially comprises the following steps: s1, pre-punching, namely pre-punching a middle hole on the steel shell, wherein the distance between the edge of the middle hole and the edge of the expected final hole is in a preset range; s2, performing back flushing, namely stamping the expected final hole forming position on the steel shell by using a punch head corresponding to the expected final hole forming size, so that the edge of the middle hole on the steel shell, the edge area of the expected final hole forming and the outer area of the edge of the expected final hole forming of the steel shell form a step surface; and S3, positively punching, namely punching the expected final hole forming position on the steel shell by adopting a punch head corresponding to the expected final hole forming size, wherein the punching direction is opposite to the punching direction of the recoil, and the edge of the middle hole on the steel shell and the edge area of the expected final hole forming are punched to form the final hole forming.

Further, the predetermined range is 0 to 1mm in step S1.

Further, in steps S2 and S3, the punching force of the positive punch and the punching force of the backlash are equal in magnitude.

As described above, the punching method for deburring of the steel shell according to the present invention has the following beneficial effects:

in the invention, a pre-punching pre-mode is adopted, the inner edge of the expected final hole is pre-reserved with a preset width, the expected final hole forming position on the steel shell is punched through recoil, so that the edge of a gap hole, the edge area of the expected final hole forming and the outer area of the edge of the expected final hole forming of the steel shell form a step, and then the residual waste in the expected final hole forming area is punched through forward punching in the direction opposite to the recoil direction to form the final hole; the final hole forming inner edge formed by the steel shell subjected to pre-punching, back-flushing and forward-punching reduces a large amount of burrs, even has no burrs, saves time and labor, and saves the cost of burr-free punching.

Drawings

FIG. 1 is a schematic diagram of pre-punching in step S1 according to the present invention.

Fig. 2 is a schematic diagram of the kickback at step S2 in the present invention.

Fig. 3 is a schematic diagram of the step S3 positive impact in the present invention.

Description of reference numerals:

100. pre-punching a punch; 110. pre-punching a female die; 200. recoiling the punch; 210. back flushing the female die; 300. positively punching a punch; 310. positively punching a female die; 400. and (4) a steel shell.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms such as "upper", "lower", "left", "right" and "middle" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and changes or modifications of the relative relationship may be made without substantial technical changes.

As shown in fig. 1, fig. 2 and fig. 3, an embodiment of the punching method for deburring a steel shell of the invention sequentially comprises the following steps: s1, pre-punching, namely pre-punching a middle hole on the steel shell, wherein the distance between the edge of the middle hole and the edge of the expected final hole is in a preset range; s2, performing back flushing, namely stamping the expected final hole forming position on the steel shell by using a punch head corresponding to the expected final hole forming size, so that the edge of the middle hole on the steel shell, the edge area of the expected final hole forming and the outer area of the edge of the expected final hole forming of the steel shell form a step surface; and S3, positively punching, namely punching the expected final hole forming position on the steel shell by adopting a punch head corresponding to the expected final hole forming size, wherein the punching direction is opposite to the punching direction of the recoil, and the edge of the middle hole on the steel shell and the edge area of the expected final hole forming are punched to form the final hole forming.

As shown in fig. 1, fig. 2 and fig. 3, an embodiment of the punching method for deburring a steel shell of the invention sequentially comprises the following steps: s1, pre-punching, namely pre-punching a middle hole on the steel shell 400, wherein the distance between the edge of the middle hole and the edge of the expected final hole is in a preset range; s2, performing back flushing, namely stamping the expected final hole forming position on the steel shell 400 by using a back flushing punch 200 corresponding to the expected final hole forming size, so that the edge of the middle hole on the steel shell, the edge area of the expected final hole forming and the outer area of the edge of the expected final hole forming of the steel shell form a step surface; and S3, performing positive punching, namely punching the expected final hole forming position on the steel shell 400 by using a positive punching head 300 corresponding to the expected final hole forming size, wherein the punching direction is opposite to the punching direction of the back punching, and the edge of the middle hole on the steel shell and the edge area of the expected final hole forming are punched to form the final hole forming.

As shown in fig. 1, in step S1, that is, in the process of pre-punching, the direction of punching the middle hole may be a forward direction or a reverse direction, in this embodiment, the forward direction is from top to bottom, and the reverse direction is from bottom to top. The key point is that the distance between the edge of the formed middle hole and the edge of the expected final hole is within a preset range, so that the expected effect can be obtained after the later-stage back-flushing and the later-stage forward-flushing. Preferably, the predetermined range of the edge distance is 0-1 mm. Of course, the optimal location for the intermediate hole is a location concentric with the intended final hole formation. The steel shell 400 is placed on a pre-punching female die 110 of a punching device, and the steel shell is punched by a pre-punching punch 100, so that a middle hole is obtained, wherein the size of the pre-punching punch 100 is matched with that of the middle hole.

As shown in fig. 2, in step S2, a punch corresponding to the size of the intended final hole is used, and the back-punching process is performed so that the scrap between the intermediate hole and the intended final hole is not broken but stepped from the area of the steel shell outside the intended final hole. The final hole is not formed because the area in the final hole is not expected to break, so there is no burr on the inner edge of the final hole. As shown in fig. 2, the steel shell 400 is placed under the recoil concave die 210 of the punching device, and the steel shell 400 is punched upwards by the recoil punch 200, so that the area forms a step with the area of the steel shell 400 except the expected final hole, and the size of the recoil punch 200 is matched with the size of the expected final hole.

As shown in fig. 3, in step S3, a punch corresponding to the desired final hole-forming size is also used, the direction of punching is opposite to the direction of punching in step S2 in the positive punching process, the slug between the intermediate hole and the desired final hole-forming is broken to form the final hole-forming, and the edge of the final hole-forming is substantially free of burrs. As shown in fig. 3, the steel shell 400 is placed on the positive punching die 310 of the punching device, the steel shell 400 is punched downwards by the positive punching punch 300, the waste between the intermediate hole and the expected final hole is punched, and the size of the positive punching punch 300 is matched with the size of the expected final hole. Preferably, in step S2 and step S3, the punching forces in the two opposite directions are equal, and the generation of burrs is minimized. In actual circumstances, it is also possible to adopt a trial and error method to appropriately adjust the relationship between the press forces in step S2 and step S3 to minimize the burrs at the final hole-forming edge, depending on the difference of the press machine.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.