Clamping Mechanism for Cutting Insert with Curved Contact Surfaces
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Solution Overview
Problem
Existing clamping mechanisms for cutting inserts in grooving or cutting-off tools face instability due to errors in V-shaped angles and curvature radii, leading to inconsistent contact and reduced cutting accuracy.
Innovation Solution
A clamping mechanism featuring contacting surfaces formed in a V-shape with inclined planes and concave convex surfaces, allowing for stable clamping by controlling contact positions and accommodating errors in angle and radius, ensuring precise alignment and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If V-shaped contacting surfaces with flat surfaces are used for clamping, then the structure is simple, but the clamping stability deteriorates due to angle errors causing inconsistent contact positions
Solution Approach 1:
The patent applies curvature by forming convex surfaces on the contacting surfaces of the holder and corresponding concave surfaces on the contact surfaces of the cutting insert. This curved surface design allows the contact points to automatically adjust and maintain stable engagement even when there are variations in V-shaped angles, thereby resolving the contradiction between structural simplicity and clamping stability.
2Reliability
If convex and concave V-shaped surfaces with curvature are used for clamping, then the clamping stability improves, but the manufacturing precision requirements increase due to difficulty in forming accurate curvature radii
Solution Approach 1:
The patent changes the geometric parameters of the contacting surfaces by introducing convex and concave curved surfaces with specific curvature radii. This parameter modification allows the system to accommodate manufacturing tolerances in V-shaped angles while maintaining stable clamping, as the curved surfaces provide a range of contact points rather than a single fixed point.
3Ease of manufacture
If flat V-shaped contacting surfaces are used, then the manufacturing process is easier, but the cutting accuracy deteriorates due to contact position variation during insert replacement
Solution Approach 1:
By forming convex surfaces on the holder's contacting surfaces and concave surfaces on the insert's contact surfaces, the patent ensures that the curved geometries guide the insert to a consistent contact position during replacement. This curvature-based design maintains cutting accuracy while remaining manufacturable through standard forming processes.
4Reliability
If multiple convex and concave surfaces are formed with high accuracy, then the contact stability improves, but the device complexity increases due to difficulty in forming four surfaces with accurate curvature radii
Solution Approach 1:
The patent merges the functions of multiple contacting surfaces by designing the convex and concave curved surfaces to work together as an integrated clamping system. The convex surfaces on the holder and concave surfaces on the insert are combined to provide both guidance and clamping functions, reducing the need for separately formed high-precision surfaces while maintaining contact stability.
Data Source
AI summary
A clamping mechanism for a cutting insert that clamps the cutting insert in an insert mounting seat having a pair of contacting surfaces facing each other. Contacting surfaces of the insert mounting seat are provided with a pair of inclined planes inclined so as to be formed in a convex V-shape in the cross-section along the contacting direction, and the contact surfaces of the cutting insert are formed in a concave V-shape which has a pair of convex surfaces with roundness to be concave toward the inclined planes, and the pair of inclined planes and the pair of convex surfaces come in contact with each other at a pair of contacting positions, which have an interval therebetween in the width direction orthogonal to the contacting direction.