Forming technology for nose body of rifle

A forming process and machine head technology, which is applied in the field of rifle machine head body forming process, can solve the problems of high metal consumption by flash, high working noise, and large forging allowance, so as to improve surface quality, reduce noise, and forging allowance small effect

Inactive Publication Date: 2015-02-11
CHONGQING JIANSHE IND GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The existing rifle nose body forming process mainly adopts the open die forging process, and its process flow is: blanking→heating→pre-forging→final forging→edge trimming→correction, the process has a large metal consumption due to flashing, and the forging allowance Large, unilateral margin is 2mm, low material utilization rate, due to high-speed hammer forging, high working noise and high labor intensity

Method used

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  • Forming technology for nose body of rifle
  • Forming technology for nose body of rifle
  • Forming technology for nose body of rifle

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Embodiment Construction

[0017] Embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0018] The forming process of the machine head body of the rifle of the present invention has the following process flow: blanking→heating→heading→extrusion forming→edge trimming. details as follows:

[0019] a, blanking: select round bar material;

[0020] b. Heating: heat the round bar to 1150°C~1250°C. When heating, only one end that needs to be pierced can be locally heated;

[0021] c. Upsetting: put the heated round bar on the electric heating upsetting machine to form a blank. The blank is as follows: figure 1 shown;

[0022] d. Extrusion forming: put the blank into the forming die for extrusion forming to form a forging. Forgings such as figure 2 As shown, among them, the upper mold and the lower mold of the forming mold are preheated to a temperature of 250°C to 300°C, the temperature of the blank is 1150°C to 1250°C, and the extr...

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Abstract

The invention discloses a forming technology for a nose body of a rifle. The technology comprises the following processing steps: (a) blanking, wherein round bar materials are selected; (b) heating, wherein the round bar materials are heated to 1150-1250 DEG C; (c) heading, wherein head gathering material heading of the heated round bar materials is performed on an electrothermal upsetting machine to form blanks; (d) extrusion forming, wherein the blanks are put into a forming mold for extrusion forming so as to form forgings; (e) edge cutting, wherein the forgings are put into an edge cutting mold to perform the edge cutting so as to obtain the forgings of the nose body. Through the adoption of the forming technology for the nose body of the rifle, disclosed by the invention, the surface quality and the size consistency of the forgings are improved, the surplus quantity of the forgings is small, the unilateral surplus quantity is decreased within 1mm from 2mm, the utilization rate of materials is increased to 96% from 82% and is substantially increased, and the processing noise of the nose body is effectively reduced.

Description

technical field [0001] The invention relates to a firearm, in particular to a forming process for a machine head body of a rifle. Background technique [0002] As an important part of special products such as rifles, the machine head is responsible for the firing and ejection of bullets during shooting under the action of heat energy. When working, it is in a state of variable speed movement (8m / s~2.5m / s). To withstand complex alternating loads, the strength and rigidity of the material are required to be high. [0003] The nose body is usually made of 25Cr2Ni4WA alloy steel material, which is mainly used in domestic ordnance industry products. Brittle transition temperature and notch sensitivity, high high temperature transient tensile and creep strength. [0004] The existing rifle nose body forming process mainly adopts the open die forging process, and its process flow is: blanking→heating→pre-forging→final forging→edge trimming→correction, the process has a large meta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00B21J5/02B21J13/02B21D28/14
CPCB23P15/00B21D28/14B21J5/02B21J13/02
Inventor 姚照云胡治刘兵李万增张必良张宝亮
Owner CHONGQING JIANSHE IND GRP
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