Polycrystalline diamond hard alloy composite sheet with rotary structure

By adopting the rotating connection between the cemented carbide ring and the cemented carbide layer in the rotating diamond composite sheet, the problem of the elastic retaining ring being prone to fatigue and deformation under high loads is solved, and higher connection strength and structural strength are achieved, and the service life is extended.

CN222633187UActive Publication Date: 2025-03-18WUHAN NINESTONES SUPERABRASIVES CO LTD
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Patent Information

Application Number
CN202421537416.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-07-01
Publication Date
2025-03-18
Estimated Expiration
2034-07-01

AI Technical Summary

Technical Problem

Under high load working conditions, the elastic retaining ring is prone to fatigue and deformation, resulting in low connection strength and structural strength and short service life.

Method used

The cemented carbide ring is used for rotating connection with the cemented carbide layer. By splicing multiple split blocks on the outside of the cemented carbide layer and fixedly connected by brazing, a stable connection between the cemented carbide ring and the cemented carbide layer is achieved.

Benefits of technology

There is no need to use elastic retaining rings, which avoids the problem of insufficient connection strength under high loads, improves the connection strength and structural strength of the cemented carbide ring and the cemented carbide layer, and extends the service life.

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Abstract

The utility model provides a polycrystalline diamond hard alloy compact of a rotating structure, and relates to the technical field of superhard composites.The polycrystalline diamond hard alloy compact of the rotating structure comprises a diamond compact body, and the diamond compact body comprises a polycrystalline diamond layer and a hard alloy layer; and the hard alloy lantern ring is rotationally arranged on the outer side of the hard alloy layer in a sleeving mode, the hard alloy lantern ring comprises at least two split blocks, and the split blocks are annularly arranged and spliced. Therefore, an elastic check ring is not needed for connection, the defect that the elastic check ring cannot bear high-load and high-strength working occasions is overcome, the connection strength of the hard alloy lantern ring and the hard alloy layer is effectively improved, meanwhile, an annular groove used for installing the elastic check ring does not need to be formed in the hard alloy lantern ring and the hard alloy layer, and the stress concentration phenomenon is avoided. And the structural strength and the service life are effectively improved. By adjusting the structure of the diamond compact, efficient cutting of the rotary cutting edge of the compact and long service life of the compact are realized.
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