Continuous Cutting Edge Carbide Tool Design
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Solution Overview
Problem
Large carbide cutting tools are not economical to manufacture as unitary tools, and existing methods for assembling carbide cutting inserts onto steel cutter bodies require precise positioning and grinding, limiting their work cycle and increasing costs.
Innovation Solution
A cutting tool design featuring a cutter body with a helical flute and a continuous cutting edge formed by a plurality of cutting inserts arranged end-to-end, allowing for precision-grinding of the entire edge as a unitary component, reducing the need for precise positioning and extending tool life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If carbide cutting inserts are mechanically secured to a steel cutter body, then the tool can be manufactured more economically, but the cutting inserts require precise positioning and precision-grinding prior to assembly, limiting the work cycle and increasing costs
Solution Approach 1:
The cutting inserts are pre-positioned in the cutter body using a preliminary action principle. The inserts are temporarily held in place during assembly, allowing for subsequent precision-grinding of the entire cutter body after assembly. This eliminates the need for precise positioning and grinding of individual inserts before assembly, while maintaining manufacturing economy.
Solution Approach 2:
The patent merges the precision-grinding operation from the individual insert level to the entire cutter body level. By assembling the inserts mechanically and then performing a single precision-grinding operation on the complete cutter body, the process combines economic mechanical assembly with necessary precision, resolving the contradiction between manufacturing economy and positioning precision.
2Reliability
If carbide strips are brazed into a steel cutter body, then the cutting tool can withstand higher temperatures and harder materials, but the entire tool must be replaced after a limited work cycle
Solution Approach 1:
The cutting tool is segmented into a reusable steel cutter body and replaceable carbide cutting inserts. The carbide inserts provide the necessary temperature and material resistance, while the steel body can be retained and reused. When inserts wear out, only the inserts are replaced rather than the entire tool, extending the effective work cycle and reducing waste.
Solution Approach 2:
The patent applies discarding and recovering by allowing the carbide inserts to be discarded (replaced) while recovering and reusing the steel cutter body. This extends the overall tool life significantly, as the expensive body is preserved and only the consumable inserts are replaced after their work cycle expires.
3Manufacturing precision
If individual cutting inserts are precision-ground prior to assembly, then the cutting edge accuracy is improved, but the positioning requirements increase and the process becomes more complex
Solution Approach 1:
The patent merges multiple individual precision-grinding operations into a single collective precision-grinding operation performed on the entire cutter body after assembly. This reduces positioning complexity because the inserts can be assembled with less stringent positioning requirements, and the final precision is achieved through the collective grinding of all insert surfaces simultaneously or sequentially as part of the body.
Solution Approach 2:
The assembly of cutting inserts is performed as a preliminary action before the final precision-grinding operation. This allows the inserts to be positioned with greater ease initially, and the critical precision is established in the subsequent grinding step that shapes the entire cutting edge, reducing the complexity of positioning requirements during assembly.
Data Source
AI summary
A cutting tool may include a cutter body, and a cutting insert group coupled to the cutter body, wherein the cutter body includes a working length, wherein the cutting insert group forms a continuous cutting edge, and wherein the continuous cutting edge extends continuously through the working length of the cutter body.