Elastic Locking Cutting Insert Mounting for Small-Diameter Holders
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Solution Overview
Problem
Existing cutting tools face challenges in securely mounting cutting inserts due to the use of small screws, leading to operability issues, screw loss, and instability, especially in small component fabrication, where the holder diameter is limited and screw handling is difficult.
Innovation Solution
A cutting insert with a concave lock portion and a holder featuring an elastically locking stopper portion and insert pocket, allowing for easy and stable mounting without screws, enhancing operability and preventing displacement during fabrication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a screw is used to clamp the cutting insert, then the cutting insert can be securely mounted, but the holder diameter cannot be reduced and operability deteriorates due to small screw handling difficulties
Solution Approach 1:
The invention extracts and eliminates the screw component from the mounting mechanism. Instead of using a screw to clamp the cutting insert, the patent employs a press-fit structure where the cutting insert is directly pressed into the holder's insertion hole, removing the need for separate fastening components and improving operability while maintaining mounting strength
Solution Approach 2:
The invention replaces the mechanical screw-clamping system with a press-fit mechanical interference system. The cutting insert has a diameter slightly larger than the insertion hole, creating a friction-based secure connection without requiring threaded fasteners, thus eliminating screw handling issues while maintaining secure mounting
2Reliability
If a screw is used to position the cutting insert, then the cutting insert can be fixed, but screw loss and fall occur and operability deteriorates
Solution Approach 1:
The invention extracts the screw component entirely from the system, replacing it with an integrated press-fit structure. The cutting insert is directly secured to the holder through dimensional interference without any separate fastening elements, eliminating the risk of screw loss while maintaining reliable fixation
Solution Approach 2:
The invention merges the cutting insert and holder into a unified assembly through direct press-fit connection. The cutting insert's fitting portion and the holder's insertion hole form an integrated structure where the insert is securely positioned without requiring separate fastening components, thereby preventing component loss
3Volume of moving object
If the holder diameter is reduced for small component fabrication, then smaller components can be fabricated, but thread provision becomes difficult and mounting strength may deteriorate
Solution Approach 1:
The invention extracts and eliminates the thread structure from the holder design. By using a press-fit interface where the cutting insert is directly pressed into the holder without threaded connections, the design enables smaller holder diameters suitable for miniaturized tooling while avoiding the manufacturing complexity of small threads
Solution Approach 2:
The invention replaces the threaded connection system with a direct press-fit mechanical interference system. This substitution eliminates the need for thread fabrication in small-diameter holders, simplifying manufacturing while maintaining secure mounting capability through friction-based mechanical interference
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables stable and secure mounting of cutting inserts, improving operability, reducing the risk of screw loss, and allowing for the fabrication of smaller components by eliminating the need for threads, thus enhancing the overall cutting process.
Implementation Method 1
a stopper portion that elastically locks the cutting insert to be fitted into the insert pocket
Data Source
AI summary
A cutting insert, a holder, and a cutting tool with which the cutting insert can be easily and stably mounted on the holder and a fabrication target object can be excellently fabricated are provided. A cutting tool 100 that is used to fabricate a fabrication target object W by cutting includes a holder 50 and a cutting insert 10 that is mounted on a distal end of the holder 50. The holder 50 includes an insert pocket 53 into which the cutting insert 10 is fitted and a stopper portion 61 that elastically locks the cutting insert 10 to be fitted into the insert pocket 53. The cutting insert 10 includes a cutting portion 11 including a cutting edge 13, a fitting portion 12 that is fitted into the insert pocket 53, and a lock portion 21 that is formed at the fitting portion 12 and is to be locked to the stopper portion 61 of the holder 50.