Power Skiving Cutting Insert Radial Adjustment
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Solution Overview
Problem
Existing power skiving tools face challenges in achieving precise radial adjustment of cutting inserts, leading to surface quality issues and difficulty in forming deep or complex tooth shapes, and they are limited in size and durability.
Innovation Solution
The power skiving tool features cutting inserts with a single cutting edge and a rear shoulder surface for fine radial adjustment, along with unsymmetrical flank edges and radial tipping, allowing for precise positioning and improved cutting performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If replaceable cutting inserts are used in power skiving tools, then tool longevity and adaptability are improved, but manufacturing precision and surface quality deteriorate due to difficulty in achieving accurate radial positioning
Solution Approach 1:
The patent replaces traditional mechanical radial adjustment mechanisms with a predetermined radial tipping-in angle geometry. The cutting insert is designed with a fixed lateral tipping-in angle (5-15 degrees) relative to the reference plane, eliminating complex adjustment mechanisms and achieving precise positioning through geometric design alone. This substitution of mechanical adjustment with geometric predetermination resolves the contradiction by providing both replaceability and precision.
Solution Approach 2:
The patent changes the geometric parameters of the cutting insert by introducing a predetermined lateral tipping-in angle (5-15 degrees) and specific edge configurations (nose edge, flank edges). These parameter changes enable the cutting insert to achieve accurate radial positioning and form complex tooth shapes without requiring complex adjustment mechanisms, thereby maintaining manufacturing precision while enabling replaceability.
2Ease of manufacture
If cutting inserts are designed with symmetrical shapes for ease of manufacture, then manufacturing ease is improved, but adaptability to form complex tooth shapes deteriorates
Solution Approach 1:
The patent deliberately introduces asymmetry into the cutting insert design by specifying a lateral tipping-in angle (5-15 degrees) and creating unsymmetrical edge configurations including a nose edge and two flank edges with different orientations. This asymmetry enables the formation of complex tooth shapes such as involute teeth while maintaining manufacturing feasibility through standardized angular specifications.
3Productivity
If the number of cutting edges per insert is increased to reduce tool readjustments, then productivity is improved, but manufacturing precision deteriorates due to difficulty in maintaining accurate radial positioning of multiple edges
Solution Approach 1:
The patent replaces mechanical adjustment systems with a predetermined geometric configuration featuring a lateral tipping-in angle of 5-15 degrees. This geometric approach ensures that multiple cutting edges on each insert maintain accurate radial positioning relative to the tool center, enabling increased number of edges per insert without sacrificing precision. The fixed angular geometry eliminates the need for complex adjustment mechanisms while maintaining positioning accuracy.
Data Source
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AI summary
The invention concerns a power skiving tool of the type that includes a basic body (7), which is equipped with a plurality of replaceable cutting inserts (8), by means of which chips can be carved or peeled out of a workpiece with the purpose of forming, for instance, teeth. According to the invention, the individual cutting insert (8) is formed with only one cutting edge (15) and has a rear end in the form of a shoulder surface (16), against which an adjusting mechanism (27) is pressed for the fine adjustment of the radial position of the cutting insert in relation to the basic body. On the under side of the cutting insert, there is in addition control means, e.g. a serration connecting surface, which interacts with the corresponding control means in the appurtenant seat (9) in the basic body. In addition, the invention concerns a power skiving cutting insert as such.