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Extrusion forming process

An extrusion forming and process technology, applied in the direction of metal extrusion dies, etc., can solve the problems of product accuracy and grain size to be improved, cumbersome operation process, and low forming efficiency

Active Publication Date: 2021-09-10
NO 59 RES INST OF CHINA ORDNANCE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the quality of products prepared by conventional processes needs to be optimized, especially the product precision and grain size need to be improved
In addition, the conventional process also has the problems of cumbersome operation and low forming efficiency.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] First, the open-cavity mold used in this example will be described. Such as figure 1 , figure 2 and image 3 shown.

[0042] The mold is mainly composed of upper mold and lower mold.

[0043] Among them, the upper mold includes an upper formwork 1, an upper backing plate 2, and an upper cover plate 3 stacked in sequence from top to bottom, and is connected with screws; the punch seat 4 is installed in the middle of the upper cover plate 3, and the punch seat 4 The outer surface is matched with the tapered surface of the inner surface of the upper cover plate 3, and the upper end surface of the punch seat 4 is attached to the lower surface of the upper backing plate 2; the upper pad 5 is symmetrically placed on the upper end surface of the outer punch 6, and the outer punch 6 and The outer circular surface of the inner punch 7 is clearance fit, and the flange boss on the upper end face of the outer punch 6 is placed on the step of the inner punch 7, so that the uppe...

Embodiment 2

[0057] A kind of extrusion forming process, with reference to embodiment 1, its main difference with embodiment 1 is that the structure of push-pull mechanism is different, and push-pull mechanism is such as in the present embodiment Figure 6 As shown, the two side walls of the same lower mandrel 15 are perpendicular to each other.

[0058] Adopting the process of the present invention can not only significantly optimize the product appearance quality and precision, greatly increase the grain size of the product, but also greatly simplify the operation process, reduce the operation difficulty, greatly improve the forming efficiency, and the forming efficiency can be increased by at least 4 times; The positioning error between different processes is eliminated, and the load on the mold is reduced, which is beneficial to prolonging the service life of the mold. In addition, the process of the invention is applicable to various materials such as alloy steel, aluminum alloy, magn...

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Abstract

The invention provides an extrusion forming process. The extrusion forming process comprises the following steps: placing a blank above an open cavity of an open cavity mold, and heating the blank to a preset temperature; performing forward extrusion loading on the whole blank to promote metal at the extrusion end of the blank to flow downwards and enter the open cavity to form a rod part; extruding the middle part and the edge part of the blank at different speeds at the same time, forming a cavity in the middle part of the blank and forming a conical surface on the outer wall of the lower part of the blank in the frustum-shaped accommodating space, wherein the extrusion speed of the edge part of the blank is smaller than that of the middle part of the blank; expanding a frustum-shaped containing space, and the edge of the blank continues to be extruded, so that the rod part and the cavity of the blank are gradually lengthened; and cutting the flange part at the top of the blank. By adopting the process, the appearance quality and precision of the product can be obviously optimized, the grain size of the product can be greatly improved, the operation process can be greatly simplified, the operation difficulty can be greatly reduced, and the forming efficiency can be greatly improved.

Description

technical field [0001] The invention belongs to the technical field of tube shell forging forming, and in particular relates to an extrusion forming process. Background technique [0002] To prepare a shell forging with a solid bottom, the conventional process includes multiple pressing, punching, multiple extrusion, drawing, post-processing and other processes. However, the quality of products prepared by conventional processes needs to be optimized, especially the product precision and grain size need to be improved. In addition, the conventional process also has the problems of cumbersome operation and low forming efficiency. Contents of the invention [0003] The object of the present invention is to provide an extrusion forming process, at least for improving product quality. [0004] In order to achieve the above object, the present invention adopts the following technical solutions. [0005] A kind of extrusion molding process, it is characterized in that, the st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C25/02B21C23/00B21C23/04
CPCB21C25/02B21C23/001B21C23/04
Inventor 黄树海陈强肖寒林军夏祥生吴洋王艳彬柴舒心
Owner NO 59 RES INST OF CHINA ORDNANCE IND