Drill Bit Asymmetric Clamping Slot Cutter Support
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Solution Overview
Problem
Conventional drill bits face challenges in providing sufficient support to hard alloy cutters while effectively removing cutting chips, leading to issues like increased noise, heat generation, and potential deformation or separation of the cutter from the tool body.
Innovation Solution
A drill bit design featuring a cylindrical tool body with a chip removing structure and clamping slot, where the clamping slot covers the back side of blade portions by a larger area than the front side, creating a larger chip removing space and ensuring support for the blade portions under workload, with a notch communicating with the chip removing structure to enhance both chip removal and cutter support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a large piece of material is left in the tool body behind the hard alloy cutter to provide strong support, then the support strength for the cutter is improved, but the chip removing efficiency deteriorates due to insufficient space for cutting chips
Solution Approach 1:
The clamping slot is designed with asymmetric coverage, covering the back side of the blade portion by a larger area than the front side. This asymmetric design allows the chip removing structure to have sufficient space for chip removal while the clamping slot provides adequate support to the blade portion, resolving the contradiction between support strength and chip removing efficiency
2Productivity
If the tool body material is partially removed behind the hard alloy cutter to increase chip removing efficiency, then the chip removing efficiency is improved, but the support strength for the cutter deteriorates leading to deformation or separation
Solution Approach 1:
The clamping slot is positioned and sized to provide localized support precisely where needed - covering the back side of the blade portion with larger area. This local quality approach ensures that support is concentrated at the critical region while allowing other areas to be optimized for chip removal, thus improving chip removing efficiency without compromising cutter support
3Strength
If insufficient space is left for cutting chips in the tool body, then the support strength is maintained, but harmful factors increase due to high noise and heat generation
Solution Approach 1:
The asymmetric design of the clamping slot coverage creates sufficient asymmetric space for chip removal while maintaining support strength. The larger coverage area on the back side allows chips to be effectively removed from the drilling area, preventing the accumulation that would generate noise and heat, thus reducing harmful factors while preserving structural support
Data Source
AI summary
A drill bit includes a tool body having a main body in the form of a cylinder. A chip removing structure is provided on the main body. The tool body has a distal end provided with a clamping slot and a cutter inlaid in the clamping slot. The cutter has at least two blade portions arranged circumferentially on the distal end of the tool body and extending radially relative to the tool body. Each of the blade portions has a front side along the drill bit's rotating direction and a back side against the rotating direction. The clamping slot covers the back side of one blade portion by an area larger than that used to cover the front side of the same blade portion.