Rotary Tool Insert Seat With V-Shaped Self-Centering Assembly
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Solution Overview
Problem
Existing modular rotary tools face difficulties in centering cutting inserts without applying a biasing force during assembly and disassembly due to the clamping webs, making the process more complex.
Innovation Solution
A modular rotary tool design featuring a carrier with V-shaped axial and radial contact surfaces that automatically center the cutting insert when a clamping screw is tightened, eliminating the need for initial biasing forces during assembly and simplifying the insertion and removal of the cutting insert.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If retaining webs exert a clamping force on the cutting insert to ensure good centering, then centering precision is improved, but assembly difficulty increases due to the bias that must be overcome during insertion and replacement
Solution Approach 1:
The cutting insert is designed with a preliminary offset in its longitudinal position relative to the plate seat. This preliminary positioning allows the insert to be inserted without overcoming clamping bias, and the offset is subsequently eliminated through the centering action of the V-shaped contact surfaces when the clamping screw is tightened, thus resolving the contradiction between centering precision and assembly ease
2Device complexity
If free-standing retaining webs are used to form a plate seat, then the structure is simplified, but centering of the cutting insert becomes difficult without applying bias
Solution Approach 1:
The V-shaped axial and radial contact surfaces create an asymmetric geometric configuration that generates automatic centering forces. The asymmetric angle of the V-shape ensures that when the clamping screw is tightened, the contact surfaces exert equal and opposite forces that precisely center the cutting insert in the plate seat, achieving high centering precision without complex structures or preliminary bias
Data Source
AI summary
The invention relates to a rotary tool (2) extending longitudinally from a shank region (8) to a front-facing end region along an axis of rotation (6) and having a carrier (4) with a plate seat (14) and a cutting insert (16) that can be replaceably inserted therein. The cutting insert (16) as well as the plate seat (14) each have radial and axial contact surfaces (40A, B) which are strained against one another with the aid of a clamping screw (50) during assembly of the cutting insert (16). According to the invention, it is provided that the axial contact surfaces (40A, B) and in particular also the radial contact surfaces (42A, B) are inclined in a V shape on one side of the cutting insert (16) and on the other side of the plate seat (14), so that a centering effect is automatically produced during assembly.