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Precise forging molding method for blank of automobile fork-shaped half shaft

A precision forging, fork-shaped technology, applied in the field of precision forging, can solve the problems of large product shape error, large machining allowance, poor quality stability, etc., to achieve small product shape error, small machining allowance, product The effect of shape error change

Inactive Publication Date: 2012-06-27
SHIYAN YUANJUN IND & TRADE
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  • Abstract
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Problems solved by technology

At present, the processing technology of this product is free forging, and the process route is: blanking - overall heating - multi-pass film extension on the stem - flattening of the head - splitting - two die forging - trimming ;The disadvantages of this technology are: large flash, large machining allowance for the whole body; low production efficiency, large product shape error, poor quality stability, and high labor intensity

Method used

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  • Precise forging molding method for blank of automobile fork-shaped half shaft
  • Precise forging molding method for blank of automobile fork-shaped half shaft
  • Precise forging molding method for blank of automobile fork-shaped half shaft

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Embodiment Construction

[0014] A precision forging forming method for an automobile fork-shaped semi-shaft blank. The forming method is a hot extrusion forming method: first, the round material is locally heated to 1050-1150 ° C; Gather the head, and then warm it up to 1050-1150°C, and complete the first hot extrusion of the billet; finally, it is formed by the second hot extrusion; in the actual implementation of the patent , pre-heat the mold to 250°C-300°C and spray graphite milk into the cavity during operation; place the sawed bar into an intermediate frequency heating furnace and heat it to 1050-1150°C, and first put the circle on a 200T hydraulic press The heated part of the bar is gathered into a square billet, such as figure 1 As shown; after gathering into a square billet, put the part of the gathered material into an intermediate frequency heating furnace to supplement the temperature to 1050-1150°C, and then hot-extrude it into a fork-shaped piece in a 315T hydraulic press, as shown in ...

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Abstract

The invention discloses a precise forging molding method for a blank of an automobile fork-shaped half shaft, which is characterized by using hot extrusion molding. The method comprises: firstly, heating part of a round material to 1,050 to 1,150 DEG C; secondly, gathering the head part by upsetting and extrusion, heating the gathered head part to 1,050 to 1,150 DEG C and thus, forming the blank by hot extrusion for the first time; and finally, forming the blank by hot extrusion again. The method has the advantages that: heating part of the material saves over 30 percent of energy than heating the whole material; the process method which is closed extrusion eliminates fins on the extruded blank and therefore saves more than 2Kg of materials than free forging; production based on a die forging process is convenient and safe in operation, the drawback of manual control over quality of free forging is overcome, the overall machining allowance is small, and the production efficiency is improved effectively; and the shape error of the product is small, which helps to guarantee the quality of the forgings.

Description

technical field [0001] The invention relates to a precision forging forming method of a fork-shaped semi-axis blank of an automobile, which belongs to the technical field of extrusion forming of metal parts. Background technique [0002] The corresponding product of the present invention belongs to the important components on the automobile axle, and the similar product is the transmission shaft; the vehicle matched with the half shaft is especially suitable for the situation of bad roads, and is mostly used by military vehicles. At present, the processing technology of this product is free forging, and the process route is: blanking - overall heating - multi-pass film extension on the stem - flattening of the head - splitting - two die forging - trimming ; The disadvantages of this technology are: large flash, large machining allowance for the whole body; low production efficiency, large product shape error, poor quality stability, and high labor intensity. Contents of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/02B21J1/06
CPCF16D3/387
Inventor 蔡利王雪松刘志勇何金元
Owner SHIYAN YUANJUN IND & TRADE
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