Forming method

Abstract

The invention discloses a forming method. According to the forming method, the traditional oil tank forming method is changed, a plastic film (5) is used for replacing vegetable oil as a lubricant, and an oil tank is composed of a pressure ring (1), a concave die (2), a convex die (3), an oil tank blank (4), the plastic film (5) and a top plate (6). The plastic film (5) is used for replacing vegetable oil as the lubricant, thus stretching marks formed due to stretching are eliminated, a smooth surface of the oil tank is obtained, the wear and normal maintenance workload of a die are reduced, the working environment is improved, welding for an upper tank body and a lower tank body is facilitated, the labour efficiency is increased, and the machining cost is saved.

Description

technical field [0001] The technology of the invention is a molding and stretching method of a fuel tank of a diesel engine. Background technique [0002] At present, in the deep drawing process of diesel engine oil tank, rapeseed oil has been used as the preferred lubricant for deep drawing. Apply vegetable oil under the blank to form a thin layer of oil film between the blank and the die, which can only lubricate to a certain extent during the stretching process, but cannot fundamentally eliminate the pull marks formed during the stretching process, sometimes Deep pull marks lead to the scrapping of the fuel tank. Because the operator manually brushes the rapeseed oil, the brushing amount of the rapeseed oil is difficult to control during operation, requiring the operator to have very high operating skills. If there is less vegetable oil coating, deep drawing marks will increase and be obvious, or because some parts are not properly oiled, it will cause the box to tear, ...

AI Technical Summary

Problems solved by technology

Apply vegetable oil under the blank to form a thin layer of oil film between the blank and the die, which can only lubricate to a certain extent during the stretching process, but cannot fundamentally eliminate the pull marks formed during the stretching process, sometimes Deep pull marks lead to scrapping of fuel tanks

Since the operator applies the vegetable oil manually, it is difficult to control the amount of vegetable oil applied during the operation, which requires the operator to have high operating skills

If there is less vegetable oil coating, deep drawing marks will increase and be obvious, or because some parts are not properly oiled, it will cause the box to tear, and cause great damage to the die, resulting in high mold consumption

Too much vegetable oil is applied, and the excess vegetable oil flows along the mold to the equipment and the ground, making the work site a mess and oily. Affect the quality of subsequent processes

Due to the existence of oil pollution, when the upper and lower parts of the fuel tank are butt welded, the weld seam will be unreliable and cause air leakage, which will directly affect the welding quality of the weld seam

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