Bullet shell multi-station continuous shaping punching process

A multi-station, warhead technology, applied in the stamping process of bullet shells, to achieve the effects of reducing the deformation area, saving manpower, and improving production efficiency

Inactive Publication Date: 2007-04-11
FUJIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention solves the defect that intermediate annealing is required in the existing process, and provides a multi-station continuous forming stamping process for warhead shells with simple process, no need for annealing, and suitable for multi-station continuous forming

Method used

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  • Bullet shell multi-station continuous shaping punching process
  • Bullet shell multi-station continuous shaping punching process
  • Bullet shell multi-station continuous shaping punching process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1) Blanking and deep-drawing the sheet to obtain a Yu-shaped blank with a diameter of 24.8 mm and a wall thickness of 1.2 mm;

[0023] 2) carrying out annealing and saponification treatment with the Yu-shaped blank;

[0024] 3) Continuous stamping and forming of the processed yu-shaped blank on a multi-station press to obtain a bullet case. The specific sequence of steps is:

[0025] ① Feeding;

[0026] ② Perform three thinning and deep drawing to become an intermediate process piece with diameter d=14.93mm and wall thickness t=0.9mm, as shown in Figure 3;

[0027] ③ cut the intermediate process parts;

[0028] ④ After four thinning and deep drawing (diameters: d 1 = 11.8mm, d 2 =9.8mm, d 3 =7.8mm, d 4 =6.8mm, as shown in Figure 4), forming the arc-shaped cone part of the warhead;

[0029] ⑤Reshaping the formed bullet case;

[0030] ⑥ Delivery.

Embodiment 2

[0032] 1) with the first 1) operation in embodiment 1;

[0033] 2) with the 2nd) operation in embodiment 1;

[0034] 3) Continuous stamping and forming of the processed yu-shaped blank on a multi-station press to obtain a bullet case. The specific sequence of steps is:

[0035] 1. with the 1. step of the 3rd) operation in embodiment 1;

[0036] 2. with the 2. step of the 3rd) operation in embodiment 1;

[0037] 3. with the 4th step of the 3rd) operation in embodiment 1;

[0038] 4. with the 3. step of the 3rd) operation in embodiment 1, namely carry out otch to the warhead casing that forms;

[0039] 5. with the 3rd in embodiment 1) the 5th step of operation;

[0040] 6. the same as the 6th step of the 3rd) operation in embodiment 1.

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Abstract

This present invention relates to a warhead continuum figuration pressing craft. It solves the vice of anneal in the present process. This process is as follow. Blank and draw the feed to get a columnar workpiece which is thin as parietal and thick as bottom. Then gradually reduce the diameter of the bottom by one or more thin drawing. Respectively shape up the arc cone surface, finally finishing. There is no need of anneal at the mid of this process. Also this invention has the virtues of high efficiency and low cost.

Description

Technical field: [0001] The invention relates to a stamping process of bullet shells, more specifically, the invention relates to a multi-station continuous forming stamping process of bullet shells. Background technique: [0002] There are many types of bullets, both civilian and military. As the "food" of firearms, bullets are mass-produced products, and improving production efficiency is one of its goals. As shown in accompanying drawing 1, the shape of the warhead case is a deep cylindrical shape with a pointed bottom, the relative height (h / d) is large, and it is difficult to form. At present, the stamping process adopted by enterprises engaged in the production of bullets in our country is: first blanking, deep drawing, annealing, and saponification are used to make blanks, and then several rounds of diameter reduction, thinning and deep drawing are carried out according to the size requirements of different types of bullets, and then Carry out annealing and saponifi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D22/20
Inventor 陈胤陈文哲
Owner FUJIAN UNIV OF TECH
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