Large-cylinder-diameter forged steel piston and manufacturing method thereof

A manufacturing method and large bore technology, applied to pistons, engine components, machines/engines, etc., can solve the problems of large size and weight, low piston strength, etc., and achieve the effects of weight reduction, improved service life, and good lubrication effect

Pending Publication Date: 2022-01-07
CRRC CHANGZHOU DIESEL ENGINE COMPONENTS CO LTD +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Purpose of the invention: The purpose of the present invention is to provide a large-bore forged steel piston that can withstand high explosion pressure and reduce the size and weight of the piston and its manufacturing method for the shortcomings of the prior art, such as low piston strength and large size and weight.

Method used

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  • Large-cylinder-diameter forged steel piston and manufacturing method thereof
  • Large-cylinder-diameter forged steel piston and manufacturing method thereof
  • Large-cylinder-diameter forged steel piston and manufacturing method thereof

Examples

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Embodiment

[0033] Embodiment: a kind of large bore forged steel piston, as attached figure 1As shown, the forged steel piston includes a forged steel piston crown 1, a forged steel piston skirt 2 and a piston pin hole 5, and the forged steel piston crown 1 and the forged steel piston skirt 2 are connected by inertia friction welding, as shown in the attached image 3 , 4 As shown in and 5, the forged steel piston crown 1 in this embodiment includes an inner ring connection surface 11, an outer ring connection surface 12, a combustion surface 13, a sleeve diameter 14 and a cooling surface 13; the forged steel piston skirt 2 in this embodiment Including the inner ring receiving surface 21 inertial friction welding with the inner ring connection surface 11, the outer ring receiving surface 22 inertial friction welding with the outer ring connection surface 12, the mouth end 23, and the oil hole 24; the inner ring in this embodiment The weld between the connection surface 11 and the inner r...

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PUM

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Abstract

The invention discloses a large-cylinder-diameter forged steel piston and a manufacturing method thereof. The forged piston comprises a forged steel piston top and a forged steel piston skirt, the forged steel piston top and the forged steel piston skirt are connected through inertia friction welding, a first lubricating oil groove structure and a second lubricating oil groove structure are arranged in a piston skirt pin hole, and the length arrangement directions of the first lubricating oil groove structure and the second lubricating oil groove structure are perpendicular to each other on different planes. The forged steel piston top and the forged steel piston skirt are connected through inertia friction welding, and the connecting mode can meet the application requirement of a high-strength diesel engine; and the number of characteristic parts, connected through counter bores and bolts, of a traditional forged steel piston skirt is reduced, so that the size and weight of the piston are reduced.

Description

technical field [0001] The invention belongs to the technical field of pistons, and in particular relates to a large bore forged steel piston and a manufacturing method thereof. Background technique [0002] In the face of increasing global environmental pollution, countries around the world have taken strong measures to implement strict emission regulations and standards, and emission has become a threshold for the sale of diesel engines. At the same time, for high-power diesel engines, fuel consumption is the biggest operating cost. Meeting the user's requirements for reducing operating costs, reducing fuel consumption of diesel engines, and improving their economy are the eternal goals of diesel engine development. In order to further reduce emissions and reduce fuel consumption, the maximum combustion pressure of diesel engines has also been greatly increased, and the maximum combustion pressure has reached 25MPa. In order to improve the combustion performance, the pist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02F3/00F02F3/22B23P15/10
CPCF02F3/003F02F3/22F02F3/0092F02F3/00B23P15/10F02F2003/0061
Inventor 韩毅谭勇敢胡瑞霞任建军李兵宋雅丽刘腾刘雨晨
Owner CRRC CHANGZHOU DIESEL ENGINE COMPONENTS CO LTD
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