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Forming method of press-in type free forging

A forming method and press-in technology, which is applied in forging/pressing/hammer devices, forging/pressing/hammering machines, manufacturing tools, etc., can solve the problems of high utilization rate of forgings and cracking, and improve the quality of materials. Utilization rate, reduction of blanking weight, and effect of lowering cost of use

Inactive Publication Date: 2020-04-21
江西景航航空锻铸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult to punch forgings for titanium alloys and high-temperature alloys, and other defects such as cracks and other defects will appear in the surrounding tissues of forgings after punching, and the utilization rate of forgings will remain high without punching.

Method used

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  • Forming method of press-in type free forging

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A forming method of press-in free forging, the specific steps are as follows:

[0022] Step 1. Calculate the deformation process of the forging, select the punch, and taper the punch, and preheat the punch. The preheating temperature of the punch is 380°C;

[0023] Step 2, according to the pre-calculated deformation process and the size requirements of the forging, forging the forging minus the remaining size after the punch is pressed, that is, obtaining the basic shape of the forging;

[0024] Step 3: Determine the pressing position of the punch in the forging and locate it, and press the punch in. The pressing process should be smooth and slow, so as to avoid the temperature rise of the forging caused by severe deformation;

[0025] Step 4: Shaping the forgings until the forging is completed. During the shaping process, the punches pressed in are subject to compressive stress and will gradually discharge the forgings.

[0026] As a further solution of the embodiment...

Embodiment 2

[0028] The weight of the forging without the punch is 365Kg, and the weight of the forging with the punch is 330Kg, saving about 10% of the material. The production process of the press-in punch is introduced below.

[0029] 1. Select the punch: choose the punch of φ160×200, the punch material is H13 (the material grade is 4Cr5MoSiV1, which is a commonly used hot work die steel), and the punch preheating temperature is 400°C (the punch preheating method, electric furnace preheating Oven hold for 60 minutes.)

[0030] 2. Design the shape of the forging before pressing the punch: according to the pressing amount of the punch, reduce the margin of 5mm in the length and width directions of the forging. Consistent with the finished forging.

[0031] 3. Press into the punch: the fitter puts the punch in the selected position, and the placement time should not be too long, and then the equipment exerts pressure on the punch to press the punch into the forging, and the pressing amou...

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Abstract

The invention discloses a forming method of press-in type free forging. The method aims to solve the problem in existing high-strength alloy free forging. The method specifically comprises the following steps: calculating the deformation process of a forged piece, selecting a punch, and preheating the punch; step 2, forging out the forge piece minus the residual size of the press-in punch according to the pre-calculated deformation process and the size requirement of the forge piece; step 3, judging the pressing position of the punch in the forged piece, positioning and pressing the punch; andstep 4, shaping the forged piece until the forged piece is finished, wherein the pressed punch is subjected to compressive stress in the shaping process, and the forged piece can be gradually discharged. The method is easy to master, high in operability and free of punching, the blanking weight of a high-strength alloy forging is reduced by using a tool, the material utilization rate is greatly improved, the yield of the forging is improved, meanwhile, the comprehensive performance of the forging can be guaranteed, and the use cost of a high-strength alloy product is reduced.

Description

technical field [0001] The invention relates to the field of free forging of high-strength alloys, in particular to a forming method of press-in free forging. Background technique [0002] Titanium alloy has excellent properties such as small specific gravity, high strength, high temperature resistance and corrosion resistance, and is currently widely used in aerospace and other military fields. In the field of aviation, Boeing's third-generation (B-747, A-300) titanium alloys accounted for more than 9%; the titanium alloy structural parts Su-27 in the third-generation fighter accounted for 15%, while the fourth-generation fighter F-22 The amount of titanium alloy structural parts accounts for 41% of the total fuselage structure. At present, TC4-DT titanium alloy structural parts are mostly obtained by forging and then machining. It is difficult to punch forgings for titanium alloys and high-temperature alloys, and other defects such as cracks caused by severe deformation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J13/00B21K29/00B21J5/06
CPCB21J5/06B21J13/00B21K29/00
Inventor 舒勇敖坤万剑平王志录吴金张元东陈小虎
Owner 江西景航航空锻铸有限公司
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