一种用于加工钻头的衬套
By using modular design and Teflon-coated bushing structure, the problem of resource waste caused by bushing wear in drill bit processing is solved, achieving improved wear resistance and service life, and reducing frictional resistance and replacement difficulty.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG FANGDA TOOL TECHNOLOGY CO LTD
- Filing Date
- 2025-07-04
- Publication Date
- 2026-07-17
AI Technical Summary
In the current drill bit manufacturing process, the inner wall of the bushing and the circumferential surface of the drill bit suffer severe wear, which leads to the need to scrap the cemented carbide after wear, resulting in resource waste. Furthermore, the traditional welding method is not convenient for replacement.
The modular design features a split first and second inner liner structure. The inner liner is made of hard alloy material with a Teflon coating on the contact surface. The dovetail groove fit and bolt slot locking mechanism ensure positioning accuracy and prevent axial movement. The inner liner can be replaced separately when it wears out.
It extends the service life of the bushing by 2-3 times, reduces the cost of use, reduces resource waste, improves processing efficiency and wear resistance, and reduces frictional resistance.
Smart Images
Figure CN224509057U_ABST
Abstract
Claims
1. A bushing for machining a drill bit, characterized by, include: The first kit has a through-hole first mounting groove on one side, a first inner liner is fitted in the first mounting groove, and the first kit and the first inner liner have an opening on the upper surface for machining the drill bit chip removal groove. The second kit has a through-hole second mounting groove on one side, and a second liner is fitted inside the second mounting groove. The second kit and the second liner have openings on their upper surfaces for machining the drill bit chip removal groove. The first kit and the second kit are provided together, and the first liner and the second liner cooperate to form a hollow structure, which is used to accommodate the drill bit; the opening of the first kit and the opening of the second kit form a chip removal groove for machining the drill bit.
2. The bushing for machining drill bits according to claim 1, characterized in that: The inner walls of the first and second liners that contact the circumferential surface of the drill bit are provided with a coating to enhance wear resistance.
3. The bushing for machining drill bits according to claim 1, characterized in that: The first inner liner has one or more first slots on its circumferential surface away from the hollow structure. The first kit has a first hole extending radially to the first slot. The first kit is positioned in the first slot by a bolt passing through the first hole, thereby restricting the axial movement of the first inner liner relative to the first kit.
4. The bushing for machining drill bits according to claim 1, characterized in that: The second inner liner has one or more second slots on its circumferential surface away from the hollow structure. The second kit has a second hole extending radially to the second slot. The second kit is positioned in the second slot by bolts passing through the second hole, thereby restricting the axial movement of the second inner liner relative to the second kit.
5. The bushing for machining drill bits according to claim 1, characterized in that: The first liner and the second liner are made of cemented carbide material.
6. The bushing for machining drill bits according to claim 1, characterized in that: The first kit has one or more first dovetail grooves, and the first inner lining has an assembly structure that is adapted to the first dovetail groove.
7. The bushing for machining drill bits according to claim 1, characterized in that: The second kit has one or more second dovetail grooves, and the second liner has an assembly structure that is adapted to the second dovetail groove.