Die forging technology adopting free forging press for low-speed diesel engine cylinder heads

Abstract

The invention discloses a die forging technology adopting a free forging press for low-speed diesel engine cylinder heads. Steel ingots are upset, punched, chambered and drawn and then undergo head cutting and tail removing to be divided into separate blanks needed by the cylinder heads; a pre-forging die and a finish forging die are prepared, four pre-forging releasing ejection holes are uniformly formed in the bottom of the pre-forging die, four finish-forging releasing ejection holes are uniformly formed in the bottom of the finish forging die, and a pre-forging releasing ejection plate is arranged on the bottom of the pre-forging die. The interior and the exterior of a pre-forging die cavity have reverse taper, a finish forging die cavity is shaped like a simplified cylinder head contour, and machining allowance is reserved. The cylindrical blanks fully insulated are placed into the pre-forging die cavity and are pre-forged in the free forging press, and according to the shape characteristics of the cylinder heads, the cylindrical blanks are machined to form pre-forging material with the upper end walls thickened and the lower end walls thinned; the pre-forging material is placed into the finish forging die cavity for finally forming the low-speed diesel engine cylinder heads. The die forging technology has the advantages that blank manufacturing is easy, the operation is convenient, the procedure work is convenient, the machining allowance is small, the size accuracy is high, the production cost is low and the production efficiency is high, and is suitable for die forging of the low-speed diesel engine cylinder heads of various types.

Description

technical field [0001] The invention relates to a process for die forging a cylinder head of a low-speed diesel engine with a free forging press. Background technique [0002] The cylinder head of a low-speed diesel engine is a key component for an engine with high thrust and high torque output. The working condition is harsh, the force is complicated, and the forging is heavy (taking G80 as an example, the forging weighs about 8t). It is usually used on free forging presses. The tire is formed by die forging. The traditional film forging method is used for production. The route is: steel ingot is drawn out, blanked into a cylindrical blank, the outer contour is formed by entering the film, and the inner hole is punched. This method has a large machining allowance, difficult to control the centering of the punching hole, and has a large forming force. . Contents of the invention [0003] The object of the present invention is to aim at the above present situation, and pr...

AI Technical Summary

Problems solved by technology

The traditional film forging method is used for production. The route is: steel ingot is drawn out, blanked into a cylindrical blank, the outer contour is formed by entering the film, and the inner hole is punched. This method has a large machining allowance, difficult to control the centering of the punching hole, and has a large forming force.

Images