Double-Sided Turning Insert Clamping With Secondary Support Surfaces
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Solution Overview
Problem
Existing double-sided negative turning inserts may displace in the insert seat during metal cutting operations, leading to inaccurate and insecure clamping.
Innovation Solution
The design incorporates a top and bottom support surface with primary and secondary support surfaces that extend inward, providing additional directional support when mounted in a complementary insert seat, reducing the likelihood of displacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional turning insert with only main support surfaces is used, then the structure is simple, but the insert may displace in the insert seat during cutting operations
Solution Approach 1:
The support surface is segmented into multiple functional zones: main support surfaces for primary positioning, primary support surfaces for secondary positioning, and pairs of secondary support surfaces for preventing displacement in specific directions. This segmentation allows each surface to perform a specific clamping function, improving overall reliability without excessive complexity.
Solution Approach 2:
The patent extends support surfaces in multiple spatial dimensions - main support surfaces provide support in the primary clamping direction, while pairs of secondary support surfaces extend in perpendicular directions to prevent displacement sideways. This multi-dimensional support architecture prevents insert displacement from multiple force vectors during cutting operations.
2Manufacturing precision
If multiple support surfaces are added to prevent displacement, then clamping accuracy improves, but the manufacturing complexity increases
Solution Approach 1:
The support surfaces are designed with universal geometric features that can be manufactured using standard machining operations. The main support surfaces, primary support surfaces, and secondary support surfaces all utilize planar geometries that can be produced with conventional CNC machining, reducing manufacturing complexity despite the increased number of surfaces.
Solution Approach 2:
The patent optimizes the geometric parameters of support surfaces - such as their areas, orientations, and positions - to achieve precise positioning while maintaining manufacturability. By carefully selecting surface dimensions and angles, the design achieves high positioning accuracy without requiring complex manufacturing processes.
Data Source
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AI summary
The present invention relates to a double sided, negative turning insert for metal cutting, which comprises a body a body comprising a top surface (1) comprising a main top support surface (14), a bottom surface (2) comprising a main bottom support surface (15), a peripheral side surface (3) connecting the top surface (1) and the bottom surface (2), and a central plane between the top surface and the bottom surface. The peripheral side surface comprises in total three corner side surfaces (4), which, as seen in a top view, each are arranged in one respective corner of an imaginary triangle (10) having three sides. The peripheral side surface comprises in total three main side surfaces (5), each extending from a respective associated first to a respective associated second of the corner side surfaces (4) along a respective associated one of the three sides of the imaginary triangle (10). At least one of the three main side surfaces (5) comprises primary support surfaces (13). The at least one main side surface (5) further comprises in total one pair of secondary support surfaces (21) facing toward opposite directions, wherein each of the secondary support surfaces (21) extend inward relative a respective one of the primary support surfaces (13), and wherein each of the secondary support surfaces (21) extend perpendicular to the central plane.