A variable depth internal groove boring tool

By designing a variable depth-of-cut internal groove boring bar, and utilizing components such as an extension rod, tool body, and mounting head, the problem of fixed cutting depth of the boring bar was solved, enabling the same boring bar to process small-diameter, large-cavity parts and simplifying the operation process.

CN224273344UActive Publication Date: 2026-05-26XINXIANG YUBEI JINGDAO AUTOMOBILE PARTS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
XINXIANG YUBEI JINGDAO AUTOMOBILE PARTS CO LTD
Filing Date
2025-07-28
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

The boring bar has a constant cutting head size, making it impossible to change the cutting depth. It cannot machine small-diameter parts with large internal cavities, and requires frequent tool changes, making operation cumbersome.

Method used

The design incorporates a variable depth-of-cut internal groove boring bar, which, through components such as an extension rod, tool body, mounting head, rotating shaft, push rod, servo motor, and miniature cylinder, utilizes a CNC system to control the cutting depth of the boring bar, enabling the machining of small-diameter, large-cavity parts.

Benefits of technology

It enables adjustable cutting depth with the same boring tool, reduces the frequency of boring tool changes, simplifies the operation process, and improves machining efficiency.

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    Figure CN224273344U_ABST
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Abstract

This utility model discloses a variable depth-of-cut internal groove boring tool, relating to the field of machining technology. The utility model includes an extension rod, a tool body, a mounting head, a rotating shaft, and a push rod. The tool body is located at one end of the extension rod, and the mounting head is located at the other end. A rotating shaft is rotatably connected to the upper part of the extension rod, and a push rod is inserted into the lower part of the extension rod. A tool shank is inserted through the tool body at a position perpendicular to its central axis, with a cutting edge at one end and a rack fixed to the upper end of the tool shank. A servo motor is fixed to the upper part of the mounting head away from the extension rod, and a miniature cylinder is fixed to the lower part of the mounting head away from the extension rod. This utility model, by incorporating an extension rod, tool body, mounting head, rotating shaft, push rod, servo motor, and miniature cylinder, solves the problems of the inability to change the boring depth and cutting depth with the same boring tool, and the inability to machine small-diameter, large-cavity parts using the same boring tool.
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