Replaceable Guide Pad Geometry for Deep-Hole Cutting Tools
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Solution Overview
Problem
Conventional cutting tools with guide pads, especially those used for deep-hole machining, face issues with guide pad wear due to friction, making replacement difficult and costly, as brazing methods can deform the tool body and screw fixation reduces strength.
Innovation Solution
A cutting tool replacement member with an inclined surface and convex upper surface design that allows for easy removal and replacement without the need for screws or brazing, maintaining the tool body's strength and eliminating the need for machining mounting holes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the guide pad is fixed to the body via brazing, then the guide pad is securely fixed, but it becomes difficult to remove and replace the worn-out guide pad, and the body is prone to becoming deformed due to heat propagation
Solution Approach 1:
The invention divides the cutting tool into separable components: a reusable body and replaceable guide pads. The guide pad can be independently removed and replaced without affecting the body, solving the replaceability issue while maintaining secure fixation during use through the tapered engagement design
Solution Approach 2:
Instead of using a permanent fixation method (brazing) that requires heating and melting, the invention uses a cold engagement mechanism with a tapered hole and overhanging parts that provide secure fixation through mechanical interference, eliminating heat-related deformation while maintaining strong attachment
2Ease of repair
If the guide pad is fixed with screws, then the guide pad can be easily removed and replaced, but threaded holes need to be formed in both the guide pad and the main part of the body, leading to reduced strengths
Solution Approach 1:
The invention extracts the fastening function from the structural components by using a separate engagement mechanism. The tapered hole and overhanging parts create a self-locking engagement that secures the guide pad without requiring threaded holes in the body, thereby preserving the structural integrity and strength of both components
Solution Approach 2:
The tapered hole acts as an intermediary mechanism between the guide pad and the body. This intermediate structure enables easy replacement while maintaining strength by distributing the engagement forces across the tapered surfaces rather than concentrating them at screw threads
3Ease of manufacture
If threaded holes are formed in the guide pad and body for screw fixation, then the guide pad can be fixed, but the strengths of the guide pad and the main part of the body are reduced
Solution Approach 1:
The invention removes the need for threaded holes from the manufacturing process. The tapered hole and overhanging part design allows for simpler manufacturing without drilling and threading operations, while simultaneously preserving the full strength of the guide pad and body components
Data Source
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AI summary
A cutting tool replacement member A comprising: a lower surface 2 which serves as a seating surface; an upper surface 1 which is opposed to the lower surface; and a side surface 3 which is connected to the upper surface 1 and the lower surface 2, wherein: when seen from a top view, the upper surface 1 comprises, in an intersection between the upper surface 1 and the side surface 3, a reference side edge 11 and an inclined side edge 12 which is inclined relative to the reference side edge 11; the side surface 3 includes a first side surface part 31 which is connected to the reference side edge 11 of the upper surface 1, and a second side surface part 32 which is connected to the inclined side edge 12 of the upper surface 1; and at least one of the first side surface part 31 and the second side surface part 32 is provided with an overhanging part which is, when seen from a top view, protruding outward with respect to the reference side edge 11 or the inclined side edge 12.