Forming method of thin web forge piece

Abstract

The forming method of the thin web type forge piece is simple, the production period can be shortened, the forging cost can be reduced, and the forge piece quality can be improved. The forming method of the thin web type forge piece comprises the steps that blank manufacturing is conducted, specifically, a bar is drawn out according to the length of the forge piece, and a cylindrical rough blank is manufactured; pre-forging is conducted, specifically, a rough blank is laid in a pre-forging lower cavity, the side face of the rough blank is made to be matched with a positioning groove, the position of the rough blank is determined, then a pre-forging die upper die moves downwards, the pre-forging lower cavity and a pre-forging upper cavity are made to be matched to flatten the rough blank till a pre-forging cavity is filled with materials, and a plate-shaped pre-forged piece with a rib structure A initial blank on one side is obtained; and finish forging is conducted, specifically, the pre-forged piece is placed in a finish forging lower cavity, the initial blank of the rib structure A of the pre-forged piece is made to be matched with the forming groove of the rib structure A, the pre-forged piece is positioned, an upper die of a finish forging die moves downwards, the finish forging lower cavity and a finish forging upper cavity are made to be matched to flatten the pre-forged piece till the finish forging cavity is filled with materials, and therefore the forged piece is obtained.

Description

technical field [0001] The invention relates to the technical field of forging of thin web parts, in particular to a forming method of thin web forgings. Background technique [0002] Thin web parts are common and extremely important key components in aircraft structures. Such parts have the characteristics of long dimensions and thin webs, and high rib structures (including high bosses) are provided on both sides of the web. . In the traditional manufacturing method, the cylindrical bar is generally drawn and then free forged and flattened, and finally the bar is drawn and pierced into a plate-shaped blank close to the shape of a forging, and then the blank is formed by die forging. The traditional manufacturing methods mainly have the following problems: [0003] 1. The shape of the blank blank is complex and the deformation process is complicated. The control of its shape mainly depends on the proficiency of the operator. The actual size of the blank blank (length, widt...

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Problems solved by technology

[0003] 1. The shape of the blank is relatively complex, and the deformation process is complicated. The control of its shape mainly depends on the proficiency of the operator. The actual size of the blank (length, width and thickness) fluctuates greatly and the consistency is not high;

[0004] 2. During the billet making process, the surface quality of the blank billet is poor, and forging defects such as surface tearing and folding often occur, and it is necessary to stop working and polish to remove damage before continuing to forge, which greatly increases the production cycle and production cost of the product;

[0005] 3. There are many fire times (5-8 fires) for billet making, and the production efficiency is low, resulting in high equipment occupation rate and high production cost;

[0006] 4. Due to the difficulty in controlling the shape of the blank, the matching between the shape of the blank and the pre-forging is not high, so that the blank cannot be positioned well in the pre-forging die, and it is difficult for the on-site operator to quickly and accurately judge the placement of the material with the naked eye. position, often through tools such as warping rods for multiple secondary swings, making the swing time too long, which eventually increases the deformation resistance of the billet during the die forging process, increases the risk of billet cracking, and reduces the forging of the billet. quality;

[0007] 5. The material loss is large, the material-to-work ratio (cutting weight / forging weight) is about 1.3, the product economy is poor, and it will cause large burrs and uneven distribution after subsequent die forging, resulting in a large forming tonnage. Exacerbate die wear and forging equipment damage;

[0008] 6. The production cycle is longer, generally 20 to 30 days

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