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Method of manufacturing a hydraulic actuator

A technology of hydraulic actuation and manufacturing methods, applied in the direction of engine components, cylinders, mechanical equipment, etc., can solve the problems of management and processing of surface roughness and shape without any record

Active Publication Date: 2017-09-01
JATCO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, there is no description on the management and processing of the surface roughness shape of the inner peripheral surface of the hydraulic cylinder of the drive pulley (slip pulley) among the pulleys for continuously variable transmissions.

Method used

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  • Method of manufacturing a hydraulic actuator
  • Method of manufacturing a hydraulic actuator
  • Method of manufacturing a hydraulic actuator

Examples

Experimental program
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Effect test

Embodiment 1

[0058] The manufacturing method of the driving pulley (an example of the hydraulic actuator) included in the belt-type continuously variable transmission of Example 1 is divided into "main part configuration of the belt-type continuously variable transmission", "manufacturing method of the driving pulley", " Outline configuration of precision cutting machining device", "Determination process of replacement of tool and tool holder", "Background technology", "Replacement determination function after finishing treatment of hydraulic cylinder inner peripheral surface", "hydraulic cylinder inner peripheral surface The role of roughness shape management" will be explained.

[0059] [Main components of a belt-type continuously variable transmission]

[0060] figure 1 A belt-type continuously variable transmission provided with a drive pulley manufactured by the manufacturing method of Example 1 is shown. Below, based on figure 1 The configuration of the main parts of the belt type...

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Abstract

The present invention provides a method for manufacturing a hydraulic actuator that can control the surface roughness shape of the inner circumferential surface of a hydraulic cylinder to suppress sliding wear of a liquid-tight sealing member by only performing precision cutting of the inner circumferential surface of a hydraulic cylinder. shape. A method of manufacturing a drive pulley (12, 22) as a hydraulic actuator provided in a belt-type continuously variable transmission (CVT) includes a raw material cutting process, and a primary pressure chamber (14) and a secondary pressure chamber. (24) Processing of the inner peripheral surface (12d, 22d) of the hydraulic cylinder where the seal ring (15, 25) slides into an oil-tight state; heat treatment process to harden the surface of the hydraulic cylinder (12b, 22b); precision cutting process , use the cutting tool (46) of the tool holder (47) to process the inner peripheral surface (12d, 22d) of the hydraulic cylinder. In the precision cutting process, when at least one of the measured values ​​of kurtosis (Rku) and skewness (Rsk) exceeds a preset management value, the tool holder (47) holding the cutting tool (46) is replaced.

Description

technical field [0001] The invention relates to a manufacturing method of a hydraulic actuator device, which performs precision cutting on the inner peripheral surface of a hydraulic cylinder of a piston / hydraulic cylinder mechanism. Background technique [0002] Conventionally, there is known a method for manufacturing a pulley for a belt-type continuously variable transmission capable of improving oil retention and improving wear resistance with good reproducibility (for example, refer to Patent Document 1). . [0003] The pulley manufacturing method described above includes a grinding step for forming the shape of the contact surface, a groove forming step for forming grooves on the contact surface by roughening the surface roughness of the formed contact surface, and grinding the grooves formed with a grinding film. The contact surface grinding process that grinds the surface of the contact surface of the part and leaves an oil groove for holding lubricating oil. In ad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00
CPCB23P15/00F16J10/04
Inventor 栗原猛志小山良浩赤星隆博辻洋一
Owner JATCO LTD
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