Universal Rotary Cutter Head Back Clamping System
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Solution Overview
Problem
Conventional rotary cutting tools require repositioning relative to the workpiece after sharpening, leading to inefficiencies in recalibrating the weight and maintaining dimensional tolerance, and necessitate different holders for various cutting insert profiles.
Innovation Solution
A rotary cutter head design with a clamping system that allows for regrinding of cutting inserts to maintain original dimensions and weight, using pre-formed holes for weight compensation and a universal clamping member for different profiles, enabling the same cutter head to be used with various inserts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the conventional front clamping member system is used, then the cutting insert is firmly pressed against the backing surface, but the backing surface must be profiled according to the cutting edge profile requiring different holders for different profiles
Solution Approach 1:
The patent inverts the clamping system by moving the profiled clamping member from the front to the back of the cutting insert. The back clamping member is now profiled according to the cutting edge profile, while the holder body maintains a simple universal backing surface. This inversion allows the same holder to accommodate different cutting insert profiles without requiring different holder bodies.
Solution Approach 2:
The patent extracts the profiling requirement from the holder body and relocates it to the removable back clamping member. This separation allows the holder body to remain simple and universal, while the profile-specific features are contained in the replaceable clamping members that can be changed according to the cutting insert profile being used.
2Reliability
If material is removed from the cutting insert during sharpening, then the cutting edge is renewed, but the weight of the insert is reduced requiring recalibration
Solution Approach 1:
The patent implements a weight compensation system where material removed during sharpening is compensated for by adding weight to pre-formed holes in the cutting insert. This allows the insert to be recovered to its original weight after sharpening, maintaining consistent balancing and operational characteristics.
Solution Approach 2:
The cutting insert is designed with self-contained weight adjustment capabilities through pre-formed holes that can be filled with weighting material. This allows the insert to self-correct its weight after sharpening without requiring external recalibration equipment or processes.
3Manufacturing precision
If the cutter head is repositioned after sharpening, then dimensional tolerance is maintained, but operational time is increased
Solution Approach 1:
The patent implements preliminary action by pre-forming holes in the cutting insert at precise locations that account for material removal during sharpening. Weight compensation material is added to these pre-positioned holes before the sharpening operation, so that when material is removed from the cutting edge, the weight is already compensated and the insert maintains its original balance and positioning characteristics without requiring repositioning of the cutter head.
Data Source
AI summary
A rotary cutting tool has a cutting insert clamped from behind by a backing clamp against a frontal abutment defined in the body of the rotary cutter head. The clamp backs the cutting insert against the cutting pressure during operation and provides for the use of a same rotary cutter with different profiles of cutting inserts. Plugs of predetermined weight can be inserted in pre-formed holes in the cutting insert to permit recalibration of the insert after a sharpening operation.