A fixture for cylindrical grinding of a part

By setting a combination of transition sleeve and left and right top blocks for centering on the main piston, combined with tie rod connection and multi-point clamping, the problem of high-precision machining of the outer diameter of the main piston was solved, and efficient and reliable grinding effect was achieved.

CN117601018BActive Publication Date: 2026-05-29CHONGQING HONGJIANG MACHINERY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHONGQING HONGJIANG MACHINERY CO LTD
Filing Date
2023-11-15
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing technology cannot directly use two-point grinding to machine the outer circle of the main piston in the fuel injection system of marine low-speed engines. This is mainly because the main piston has no center holes at both ends and there are gaps on the end face, resulting in incomplete external chamfers and making it impossible to achieve high-precision machining.

Method used

A transition sleeve is used to achieve centering, and the part to be processed is fixed by the left and right top blocks to form a centering reference. Combined with tie rod connection and multi-point clamping, the positioning and vertical accuracy of the part to be processed are ensured. The outer circle is finely ground by fixing it with the grinding machine center.

Benefits of technology

It achieves high-precision machining of the outer diameter of the main piston, ensuring machining accuracy and efficiency, solving the precision grinding problem that is difficult to achieve with conventional processes, and is suitable for parts with complex structures.

✦ Generated by Eureka AI based on patent content.

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  • Figure CN117601018B_ABST
    Figure CN117601018B_ABST
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Abstract

The application relates to a clamp for part external grinding. The clamp for part external grinding comprises a left top block, a transition sleeve, a right top block and a pull rod, the transition sleeve is provided with a guide centering hole for realizing centering of a part to be machined, one end of the guide centering hole is provided with the left top block, and the other end is provided with the right top block, and the left top block and the right top block are connected through the pull rod to realize clamping and fixing of the part to be machined. The application solves the problem that the main piston in the existing oil pump assembly cannot be directly machined in the two-end grinding process.
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