Laser cladding drill bit

By laser-coating a wear-resistant coating onto the drill bit body and combining it with a splined shaft, stop, and limit cylinder structure, the problem of traditional drill bits being easily damaged under high loads is solved, achieving stable and reliable drilling performance.

CN224532640UActive Publication Date: 2026-07-21HANGZHOU WANGSHILAI ELECTRIC TOOLS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
HANGZHOU WANGSHILAI ELECTRIC TOOLS CO LTD
Filing Date
2025-09-10
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

In traditional detachable drill bit structures, the torque is concentrated on the slide bar and locking screw, forming stress concentration points. Under high load impact, these points are prone to shearing fracture, and the threads are prone to loosening and stripping, leading to drill bit wobbling and accelerated damage.

Method used

Laser cladding technology is used to form a coating on the drill bit body that improves wear resistance and hardness. Through the design of spline shaft, stop and limit cylinder structure, torque and pressure are transmitted to avoid the thread directly bearing the cutting force and enhance the connection stability.

Benefits of technology

It improves the wear resistance and hardness of the drill bit, ensures smooth torque transmission, reduces the chance of damage, and extends the service life of the drill bit under high load and complex conditions.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224532640U_ABST
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Abstract

The utility model discloses a laser cladding drill bit relates to drill bit technical field, including drill bit body and drill rod, the drill bit body is installed at the bottom of drill rod, the spiral blade is fixed with to the drill rod outer wall, the recessed groove is seted up on the end face of drill bit body, the end wall of recessed groove is fixedly connected with the spline shaft, the spline groove is seted up on the bottom end face of drill rod, the spline shaft extends to the spline groove, and laser cladding layer greatly improves the wear resistance and hardness of drill bit body, in the drilling process, the cutting force that drill bit body bears acts on the convex stripe, to guarantee the smooth transmission of torque, and the pressure acts on the stopper, to guarantee that drill bit body will not sway up and down, and the spacing cylinder plays the spacing effect, so that the stopper will not come off in the operation process of drill bit body, and because the thread structure does not directly bear the cutting force and pressure, this greatly reduces the damage probability, and the force transmission is more scientific with the face contact transmission.
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