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High-precision closed-forging technology for forge piece

A high-precision, forging technology, applied in the field of forging processing, can solve problems such as imperfect control of production factors, unsatisfactory product precision control, and large product machining allowances, so as to save mold material consumption, reduce product size problems, and reduce materials. The effect of consumption

Inactive Publication Date: 2019-09-17
泰州浙华机械精锻有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most of the forgings on the market now use open forging with upper and lower Haval dies, and some use closed die forging, but because of the immature technology, the product precision control is not ideal, the product processing allowance is large, and the draft angle is large
The traditional upper and lower Haval mold open forging process is simple, especially for some special-shaped parts, but for some regular products such as round parts and square parts, the production efficiency is low, the loss of material consumption caused by flashing is large, and there are wrong molds on the top and bottom of the product. , poor concentricity and other issues
The general immature closed die forging can only partially solve the shortcomings of open die forging because of the imperfect control of various production factors, but there are many problems such as difficult demoulding, large draft angle, and poor concentricity.

Method used

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  • High-precision closed-forging technology for forge piece
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  • High-precision closed-forging technology for forge piece

Examples

Experimental program
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Effect test

Embodiment 1

[0034] A closed forging process for high-precision forgings, comprising the following process steps:

[0035] 1) Cutting: According to the process requirements, the raw materials are cut to length, and the qualified materials are selected for use;

[0036] 2) Heating: using an intermediate frequency electric furnace, sending the qualified materials in step 1) into the burner for heating at one time to obtain hot materials;

[0037] 3) Roughing: send the hot material to the roughing station of the mechanical pressure forging machine for roughing treatment to obtain roughed parts;

[0038] 4) Forming: send the pier rough piece to the forming station of the mechanical pressure forging machine, perform forming treatment, and obtain the intermediate product of forging with holes;

[0039] 5) Punching: Send the intermediate forging with holes to the punching station of the mechanical press punching machine for punching to obtain the finished forging with round holes.

Embodiment 2

[0041] A forming die applied to the above-mentioned closed forging process of high-precision forgings, such as Figures 1 to 3 As shown, it includes an upper template 1, a lower template 2, a die cavity 3, a lower ejection cylinder 4, a punch assembly 5, a mold assembly 6, and a release aid assembly 7. The punch assembly 5 includes a punch 51 and a sleeve The punch sleeve 52 outside the punch 51, the mold assembly 6 includes a mold 61, a mold sleeve 62 sleeved outside the mold 61, and a pad 63 adapted to the bottom of the inner cavity of the mold 61, and the release aid assembly 7 includes a cross arm 71 , the large load 72 that is sleeved outside the cross arm 71, the vertical suspension 73 that is slidably connected with the large load 72, and the upper ejection cylinder 74 that is connected with the large load 72.

Embodiment 3

[0043] Provide example based on embodiment 1, embodiment 2, as follows:

[0044] 1) Blanking: This process has high requirements on the weight control of raw material blanking, because the follow-up mold has no flash design, and hot die forging is a kind of forging equipment with a bottom dead point. Too much blanking weight exceeding the specified value will lead to If the equipment is boring, the mold and equipment may be damaged. If the weight of the blank is too small or too much, the product will not be filled in the mold and the product will be scrapped. Therefore, the outer diameter of the raw material round steel needs to be inspected, and the error of the outer diameter of the same production batch should be within ±0.3mm, otherwise the weight of the subsequent blanking is likely to be out of tolerance. The blanking equipment adopts CNC circular saw, which can precisely control the length of the blanking to ensure the weight of the blanking, and can ensure that the tw...

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Abstract

The invention provides a high-precision closed-forging technology for a forge piece. The technology comprises the technical steps of feeding, heating, heading, molding, punching and the like. By controlling the quality of raw materials and improving technical parameters in all steps, in cooperation with optimization of a formed mold, the finished product rate of the forging technology is greatly increased, the quality of the forge piece is obviously improved, the whole technology is stable and reliable, the control cost is lower, and the technology is suitable for industrial application and popularization.

Description

technical field [0001] The invention relates to the technical field of forging processing, in particular to a closed forging process for high-precision forgings. Background technique [0002] Forgings refer to workpieces or blanks obtained by forging and deforming metal blanks. By applying pressure to the metal billet to cause plastic deformation, its mechanical properties can be changed. By forging, defects such as as-cast looseness of the metal produced during the smelting process can be eliminated, and the microstructure can be optimized. At the same time, due to the preservation of the complete metal flow line , The mechanical properties of forgings are generally better than castings of the same material. [0003] Most of the forgings on the market now use open forging with upper and lower Haval dies, and some use closed die forging. However, due to immature technology, product precision control is not ideal, product processing allowance is large, and draft angle is lar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/02B21J13/02B21J13/14B21K29/00
CPCB21J5/025B21J13/02B21J13/14B21K29/00
Inventor 张学华张伟杨奕聪张亨杨荷英徐双依雪
Owner 泰州浙华机械精锻有限公司
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