Welding type single piece piston in forged steel with close internal cooling oil pocket and fabricating method

A technology of integral piston and manufacturing method, applied in the direction of piston, manufacturing tool, quenching agent, etc., can solve the problem that the aluminum piston cannot meet the high power of the engine, and achieve the effect of small deformation, ensuring work reliability and increasing structural rigidity.

Inactive Publication Date: 2007-12-26
SHANDONG BINZHOU BOHAI PISTON
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the current aluminum piston cannot meet the requirements of high power, high reinforcement and low emission of the engine, and provide a piston with simple structure, easy to use, which can meet the requirements of high power, high reinforcement and low emission of the engine. Welded Forged Steel Integral Piston with Closed Internal Cooling Oil Chamber and Manufacturing Method Thereof

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  • Welding type single piece piston in forged steel with close internal cooling oil pocket and fabricating method

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0028] In FIG. 1 , the piston body 2 and the piston ring body 1 are separately forged components, and the two are welded together by laser. There is one or more ring grooves 8 on the piston ring body 1, and the laser welding zone 4 of the piston body 2 forms two annular areas, the upper and lower ring areas, and an internal cooling oil chamber 3 is formed between it and the piston body 2, and the oil chamber 3 passes through Two or three oil inlet and outlet holes communicate with the inner cavity of the piston. An annular groove 7 is arranged on the skirt 6 of the piston body 2, and a pin hole 5 is arranged at the bottom of the piston body 2, and concave deviations are forged on both sides of the pin hole 5.

[0029] The manufacture method of product of the present invention is:

[0030] ①. Separately forge the piston body and piston ring, and the ma...

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Abstract

This invention discloses a weld forging steel single-piece piston and its manufacturing method meeting the requirement of high power, high intensification and low discharge including: a piston body containing a piston ring welded to one unit with the piston by laser, an internal cool oil cavity set between them to connect with the internal cavity of the piston by at least two inlet and outlet holes and a bolt hole under the piston.

Description

technical field [0001] The invention relates to a structure and a manufacturing method of a welded forged steel integral piston with a closed internal cooling oil cavity. Background technique [0002] At present, the engines used in trucks, construction machinery, railway locomotives and marine engines are all developing towards high power and high load. The material gradually cannot meet the requirements of high power, high reinforcement and low emission of the engine. [0003] For high-power and high-load diesel engine pistons, there are also hinged pendulum pistons, that is, the piston head and piston skirt are manufactured separately and connected by piston pins. The piston head is made of cast iron or forged steel, and the piston skirt is made of aluminum. Because the piston head and the piston skirt are manufactured separately, this kind of piston increases the processing cost, and it is difficult to form a closed cooling oil chamber, so the cooling effect of the pist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02F3/22
CPCF02F2003/0061F02F3/003C21D1/58F02F2200/04F02F3/22Y10T29/49249Y10T29/49265
Inventor 林风华张庆远马学军张峰
Owner SHANDONG BINZHOU BOHAI PISTON
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