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Method for laser compound treating surface of friction pair

A compound treatment and friction pair technology, applied in heat treatment furnaces, heat treatment equipment, laser welding equipment, etc., can solve problems such as cylinder bore and piston ring frustration, surface hardness does not increase, cylinder bore deformation, etc., to achieve smooth and smooth oil passage , Improve the lubrication condition and reduce flash

Inactive Publication Date: 2003-03-12
JIANGSU UNIV
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AI Technical Summary

Problems solved by technology

Now some domestic manufacturers have begun to adopt laser heat treatment method, which can greatly improve the surface hardness, but laser heat treatment is easy to deform the cylinder bore, and it is necessary to arrange a long-term follow-up honing process, which significantly increases the cost, and may also be caused by improper parameter setting. , so that there is a "frustrating plate" effect between the cylinder bore and the piston ring
In order to improve the lubrication condition of the surface, the German patent (DE4316012) proposed to use a laser beam with a certain energy density to form crisscross lubricating oil passages and oil storage concave cavities on the surface, but the surface hardness of the material did not improve

Method used

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  • Method for laser compound treating surface of friction pair
  • Method for laser compound treating surface of friction pair
  • Method for laser compound treating surface of friction pair

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Embodiment Construction

[0021] Such as figure 1 As shown, the device includes three main parts: a laser generator (1), a laser output head (3) and an external optical path system (2) composed of a mirror (4), a lens (5) and a mirror (6). The laser light generated by the laser generator (1) is collected by the mirror (4) to the lens (5), and then irradiated onto the surface of the workpiece (7) by the mirror (6). Through the reciprocating movement of the laser output head (3) up and down and the rotation of the workpiece (7), or the rotation of the laser output head (3) itself, or the rotation of the reflector (6) in the laser output head (3), the Synthesize laser scanning trajectories of various shapes to achieve surface laser composite processing on the required area of ​​the workpiece.

[0022] Such as figure 2 , 3 As shown, an embodiment of the present invention treats cylinder bore surfaces. After the cylinder bore is precision machined by final mechanical honing, the original surface for la...

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Abstract

A laser technology for processing the surface of friction set, especially the inner surface of cylinder for IC engine, to generate an antiwear hardened layer and a microscopic geometry for lubricating is disclosed. Two laser device with different parameters are used to respectively generate the microscopic pits and hardened layer in the region to be seriously abrased and the microscopic geometry for higher lubricating performance in other regions.

Description

Technical field [0001] The invention relates to the field of mechanical processing, in particular to a laser composite treatment method for the surface of a friction pair, which is especially suitable for the treatment of the surface of the cylinder bore of an internal combustion engine. appearance. Background technique [0002] As we all know, in general mechanical device systems, there are various forms of friction pairs. The tribological behavior of these friction pairs not only affects the operating efficiency of the mechanical system, but is even the main cause of its failure. The cylinder bore and piston ring are one of the most critical friction pairs in the internal combustion engine, which directly affects the service life and performance of the internal combustion engine. Because it works under the harsh conditions of high temperature, high pressure and high speed, it is prone to various wear and tear, so it is necessary to improve the anti-wear and anti-wear per...

Claims

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Application Information

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IPC IPC(8): B23K26/36B23P9/00C21D1/09C21D9/14
Inventor 张永康符永宏蔡兰叶云霞
Owner JIANGSU UNIV
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