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Technology for Die Forging Low Speed ​​Diesel Engine Cylinder Head with Free Forging Press

A technology of cylinder head and forging press, which is applied in forging/pressing/hammering machinery, forging/pressing/hammer device, mechanical equipment, etc. It can solve the problem of large machining allowance, large forming force, and difficult control of punching centering, etc. problem, to achieve the effect of small machining allowance, simple billet making, and reduced follow-up processing man-hours

Active Publication Date: 2017-05-24
武汉重工铸锻有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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  • Technology for Die Forging Low Speed ​​Diesel Engine Cylinder Head with Free Forging Press
  • Technology for Die Forging Low Speed ​​Diesel Engine Cylinder Head with Free Forging Press
  • Technology for Die Forging Low Speed ​​Diesel Engine Cylinder Head with Free Forging Press

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Embodiment Construction

[0026] Concrete steps of the present invention are:

[0027] 1) Will figure 1 The shown riser-free steel ingot 12 is punched after upsetting, punched with a hollow punch, and the center material is washed away to obtain figure 2 13 pieces of punching as shown;

[0028] 2) Pull the punching part 13 into a cylindrical blank with an extended mandrel. The outer diameter of the cylindrical blank is 75%±5mm of the outer diameter of the flange of the cylinder head forging, and the inner diameter is 90%±5mm of the inner hole diameter of the cylinder head forging. 5mm; the length should be 1.05 times the weight of the cylinder head forging;

[0029] For example, if a larger size steel ingot without a riser is used, multiple pieces are continuously forged, and the inner and outer diameters are in place and then divided into single pieces of the required length;

[0030] 3) Prepare the pre-forging die, refer to image 3 Four pre-forging ejection holes 3 are evenly distributed on the...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21K3/02B21J5/10B21J5/02B21J13/02
CPCB21J5/022B21J5/10B21J13/02B21K3/02
Inventor 廉荣光陈飞刘振新于海娟田子敬赵艳峰陈济凯张琳琅张燕
Owner 武汉重工铸锻有限责任公司
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