CN104959518A - Method for preparing flange plate through die forging technology - Google Patents

Abstract

The invention discloses a method for preparing a flange plate through a die forging technology. The method for preparing the flange plate through the die forging technology comprises the steps that 1 a blank railway wagon is heated, preforming is conducted through swage forging, machining is conducted and core materials are taken out under the condition that finished products have enough machining allowance, and semi-finished products with the core materials taken out are machined to four finished products; 2 the core materials are heated, preforming is conducted through swage forging, machining is conducted, the core materials are taken out under the condition that the finished products have enough machining allowance, and the semi-finished products with the core materials taken out are machined to two finished products; 3 the core materials are heated, preforming is conducted through swage forging, then machining is conducted, the core materials are taken out, and the semi-finished product with the core materials taken out is machined to one finished product. According to the method for preparing the flange plate through the die forging technology, metal has three-dimensional pressure stress action in a forming die, the problem of longitudinal cracking of the broadside of a tamper cake is solved, producing seven finished products by one blank is achieved, waste materials generated by machining are reduced, and using ratio of materials is improved by about 30 %.

Description

A kind of method adopting loose tooling forging fabrication technique to prepare ring flange

Technical field

The present invention relates to metal-pressed machine field, particularly relate to a kind of method adopting loose tooling forging fabrication technique to prepare ring flange.

Background technology

The forging method of aluminium alloy flange dish (external diameter≤φ 800mm) is generally open die forging jumping-up-punching-punching the wad, then carries out machining, obtains finished parts up to specification.Find in forging process, by the method for open die forging jumping-up, when forging ratio >=5.5, the easy side longitudinal cracking of the upsetting cake obtained, and also a blank goes out one or two pieces finished product, and the surplus that machine adds is quite large, and cause the waste of material, efficiency is not high.

Summary of the invention

The object of the invention is for prior art Problems existing, a kind of method adopting loose tooling forging fabrication technique to prepare ring flange is provided.

Above-mentioned purpose is realized by following proposal:

Adopt loose tooling forging fabrication technique to prepare a method for ring flange, it is characterized in that, described method comprises:

The first step: by blank railway carriage, heating, by swage forging upsetting formation, carries out machining when ensureing that finished parts has enough machine-finish allowances and draws out core material, and be four finished products (1) by drawing out the semi-finished product machining after core material, core material (2) gives over to next jumping-up;

Second step: core material (2) is heated, by swage forging upsetting formation, carry out machining when ensureing that finished parts has enough machine-finish allowances and draw out core material, and be two pieces finished product (4) by drawing out the semi-finished product machining after core material, core material (5) gives over to next jumping-up;

3rd step: core material (5) is heated, by swage forging upsetting formation, then carries out machining and draw out core material, and be processed as a finished product (6) by drawing out the semi-finished product after core material.

Beneficial effect of the present invention: the present invention utilizes loose tooling forging, make metal in loose tool, have three-dimensional compressive stress effect, solve the problem of upsetting cake side longitudinal cracking, realize a blank and go out seven finished products, reduce the waste material that machining produces, the utilization rate of material improves nearly 30%, is namely increased to more than 65% from 30%, greatly improves labor productivity; Its forging method is rationally simple and easy, and disposable input die cost is little, and implementation step is clear understandable, significantly reduces costs.

Accompanying drawing explanation

Fig. 1 is principle schematic of the present invention.

Detailed description of the invention

The method that the present invention prepares ring flange comprises:

1, by blank railway carriage, heating, folded forging upsetting core under suitable forging ratio, namely by swage forging upsetting formation, ensureing that carrying out machining under finished parts has enough machines to add surplus 3 situation draws out core material, and be four finished products 1 by drawing out the semi-finished product machining after core material, core material 2 gives over to next jumping-up, and machining is not carried out in its upper and lower end face;

2, core material 2 is heated, select suitable forging ratio, upsetting formation, ensureing that carrying out machining under finished parts has enough machine-finish allowance 3 situations draws out core material, and be two pieces finished product 4 by drawing the semi-finished product machining after core, core material 5 gives over to next jumping-up, and machining is not carried out in its upper and lower end face;

3, core material 5 is heated, jumping-up, then carry out machining and draw out core material, and be a finished product 6 by drawing out the semi-finished product machining after core material, amount to and obtain seven finished products.

For the production technology of 5A02 aluminium alloy flange dish, production craft step comprises:

1, specification Φ 310 × 390mm after blank railway carriage, blank heating temperature is 470 ± 5 oC, jumping-up forging ratio is 2.8 for the first time, final forging temperature >=350 oC, Φ 474 × 140mm is of a size of after jumping-up, core material is of a size of Φ 332 × 140mm, and machining finished product part is of a size of Φ 468 × Φ 352 × 25mm, and number of packages is 4.

2, core material carries out second time jumping-up, and heating-up temperature is 470 ± 5 oC, and forging ratio is 2.2, Φ 474 × 61mm is of a size of after jumping-up, after machining, core material is of a size of Φ 332 × 61mm, and machining finished product part is of a size of Φ 468 × Φ 352 × 25mm, and number of packages is 2.

3, again heated by core material, temperature is 470 ± 5 oC, carries out third time jumping-up, and forging ratio is 2.2, is of a size of Φ 474 × 28mm after jumping-up, and machining obtains finished parts and is of a size of Φ 468 × Φ 352 × 25mm, and number of packages is 1.Total obtains 7, finished product ring flange.

Claims (1)

1. adopt loose tooling forging fabrication technique to prepare a method for ring flange, it is characterized in that, described method comprises:

The first step: by blank railway carriage, heating, by swage forging upsetting formation, carries out machining when ensureing that finished parts has enough machine-finish allowances and draws out core material, and be four finished products (1) by drawing out the semi-finished product machining after core material, core material (2) gives over to next jumping-up;

Second step: core material (2) is heated, by swage forging upsetting formation, carry out machining when ensureing that finished parts has enough machine-finish allowances and draw out core material, and be two pieces finished product (4) by drawing out the semi-finished product machining after core material, core material (5) gives over to next jumping-up;

3rd step: core material (5) is heated, by swage forging upsetting formation, then carries out machining and draw out core material, and be processed as a finished product (6) by drawing out the semi-finished product after core material.