Hot forging, cold drawing composite molding process of bowl-shaped piece
A compound forming and hot forging technology, which is applied in the field of metal forming technology, can solve the problems of waste of materials and energy, long processing process, desoldering and disintegration, etc., and achieve the effect of reducing cutting amount, improving strength and avoiding disintegration
Active Publication Date: 2014-07-23
安徽省小小科技股份有限公司
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Problems solved by technology
According to the technical requirements of the strength, wear resistance and firmness of the workpiece, if the bowl-shaped piece is processed by turning after forging, a large amount of raw materials will be cut later, and the processing process will be long, wasting materials and energy
If the split processing method (existing method) is adopted, that is, split forging, machining, press-fitting, welding, re-machining and other cumbersome processes are combined into a whole, there is a risk of desoldering and disintegration, and there is a control failure after assembling the car security risks
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[0031] Examples such as Figure 1-13 as shown,
[0032] A bowl ( figure 1 ) hot forging, cold deep drawing compound forming process, including the following steps: blanking → heating → upsetting billet → primary annealing → shot blasting → primary phosphating → four deep drawing, bright annealing, phosphating → flanging, bright annealing, Phosphating→edge pressing→edge trimming and punching→grooving forming;
[0033] The specific process is as follows:
[0034] Step 1: The blanking is to put the round steel on the shearing machine to form a bar; the heating is to heat the bar to 800°C-900°C; the upsetting is to put the bar into the first On the lower heading 2 of the press machine with grooves, the pressure is applied by the press, and the upper heading 1 is pressed down to divide the material of the bar and remove the oxide scale generated during heating, and upset the bar into a convex shape on the lower end surface. Drum-shaped blanks of tables; such as image 3 shown....
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The invention discloses a hot forging, cold drawing composite molding process of a bowl-shaped piece. The process comprises the following steps of baiting, heating, blank stocking, one-time annealing, shot blasting, one-time phosphorization, four way drawing, bright annealing, phosphorization, flanging, bright annealing, phosphorization, blank pressing, trimming and piercing, and grooving forming. The purpose of forming the whole plasticity of the piece is realized without separate processing re-combination. The strength, the abrasion performance and the soundness of the piece are improved. The stoppages of separation and disintegration are avoided in the process that the piece is used; meanwhile, the product is critically net formed. The processing procedure is decreased. The raw materials and the energy are saved. The processing efficiency is high. The hot forging, cold drawing composite molding process is a novel process which is especially suitable for producing and processing bowl-shaped electromagnetic valves on a large scale.
Description
technical field [0001] The invention belongs to a forming process of a metal part, in particular to a composite forming process of hot forging and cold drawing for a bowl-shaped part. Background technique [0002] At present, the bowl-shaped part-the electromagnetic valve body is an important part in the control module of the automobile transmission, and its application is extremely extensive. According to the technical requirements for the strength, wear resistance and firmness of the workpiece, if the bowl-shaped part is processed by turning after forging, a large amount of raw materials will be cut later, and the processing process will be long, wasting materials and energy. If the split processing method (existing method) is adopted, that is, split forging, machining, press-fitting, welding, re-machining and other cumbersome processes are combined into a whole, there is a risk of desoldering and disintegration, and there is a control failure after assembling the car sec...
Claims
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IPC IPC(8): B23P15/00
Inventor 许道益周晓滨江立权高志华
Owner 安徽省小小科技股份有限公司