Method for processing valve mechanism constituting member

Abstract

The present invention provides a surface treatment method of a valve mechanism component capable of providing a product that can stably achieve a predetermined pulsation reducing effect and that can maintain the pulsation reducing effect for a long period of time. Around the suction hole 24 (seat surface 51 ) of the valve plate 2 where the suction valve 30 abuts or on the portion of the suction hole 24 abutting the valve plate 2 , a plurality of recesses 60 are formed by laser processing. The convex portion 61 may be formed around the concave portion 60 by laser processing. When the convex portion 61 is formed, the hardness of the convex portion 61 is adjusted to be relatively higher than other portions by irradiation of laser light.

Description

technical field [0001] The present invention relates to a method of processing components constituting a valve mechanism used in a reciprocating compressor, and in particular to a method of processing a contact portion between a valve plate and a valve. Background technique [0002] In a conventional reciprocating compressor, a piston is reciprocally housed in a cylinder bore of a cylinder, and a rear head is fixed to the rear of the cylinder by bolts via a valve plate. [0003] The rear cylinder head defines a suction chamber and a discharge chamber. The cylinder bore and the suction chamber are connected through the suction hole formed on the valve plate controlled by the suction valve, while the cylinder bore and the discharge chamber are connected through the discharge chamber. The valve controls the opening and closing of the discharge hole formed on the valve plate to communicate with each other. When the piston is in the suction process and the pressure in the cylinde...

AI Technical Summary

Problems solved by technology

[0008] However, although the former surface roughening scheme can be achieved by shot peening, etc., when using shot peening, care must be taken during cleaning to avoid residual shot peening particles, and the rough surface will be worn after long-term use, resulting in initial roughness. The pulsation reduction effect is weakened

[0009] As for the latter method, although there is no need to worry about problems such as shot peening particles remaining when forming unevenness, the shape of the uneven surface is limited by the shape that can be formed by stamping, and there is a disadvantage that it cannot be formed into a fine shape.

In addition, as the production progresses, the die wears out and the size of the reproduced unevenness changes. In order to provide a product that can stably achieve the predetermined pulsation reduction effect, it is necessary to frequently manage the die.

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