Large-size sapphire crystal outer circle face grinding clamp

By designing a fixture with a support shaft and a three-jaw mechanism on a lathe, the problem of unstable clamping of large sapphire crystal rods during processing was solved, achieving stable support for the end face and side face, and reducing the risk of breakage.

CN223455776UActive Publication Date: 2025-10-21YUNNAN HUALIJING TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202422586663.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-10-25
Publication Date
2025-10-21
Estimated Expiration
2034-10-25

AI Technical Summary

Technical Problem

Existing technologies, when processing large-sized sapphire crystal rods, suffer from clamping instability that leads to the risk of breakage, and it is difficult to ensure support for both the end face and the sides at the same time.

Method used

A clamping device is designed, comprising a support shaft, a fastening rod, an adjuster, a collar, and a three-jaw mechanism. The device is mounted on the lathe's power head and tailstock via the support shaft and fastening rod. The three-jaw mechanism supports the two end sidewalls of the sapphire crystal rod, and the clamping stability is increased by combining a bowl-shaped washer and a spring.

Benefits of technology

This technology provides stable support for large sapphire crystal rods during the outer surface machining process, reducing the risk of breakage and enhancing the uniformity and stability of the clamping force.

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Abstract

The utility model relates to the field of sapphire crystal processing, in particular to a large-size sapphire crystal outer circle face grinding clamp which is oppositely arranged on a lathe power head and a lathe tailstock of a lathe respectively and comprises a supporting shaft arranged on a lathe power head or a lathe tailstock main shaft, a fastening rod arranged in the supporting shaft in a telescopic mode and a clamping device arranged in the fastening rod. The three-jaw mechanism is hinged to the fastening rod and obliquely penetrates through the side wall of the supporting shaft, and the adjuster is arranged on the outer side wall of the supporting shaft and adjusts the opening degree of the three-jaw mechanism; the adjuster comprises a thread arranged on the outer wall of the supporting shaft, a lantern ring matched with the thread and a sleeve arranged on the lantern ring. According to the utility model, the three-jaw mechanism is added to support the side walls of the two ends of the sapphire crystal bar on the basis of retaining the original end surface force application, so that the large-size sapphire crystal bar can support both the end surface and the side surface in the excircle surface machining process.
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