Wedge Pressing Member for Compact Multi-Insert Cutting Tools
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Solution Overview
Problem
Existing cutting tools face limitations in increasing the number of cutting inserts and reducing the size of the tool body due to the space occupied by pressing members used for fixation.
Innovation Solution
A pressing member with a wedge part and a pressure-receiving part is designed to be inserted into a pocket of a tool body, allowing for the fixation of cutting elements without the need for a female thread portion, thereby reducing the size of the pressing member and allowing for more cutting elements and a smaller tool body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional pressing member with a female thread portion is used for fixation, then the cutting insert can be securely fixed to the tool body, but the pressing member occupies space at the leading end of the tool body, limiting the number of cutting inserts that can be mounted and increasing the tool body size
Solution Approach 1:
The female thread portion is extracted from the pressing member and transferred to a separate fastening component. This allows the pressing member to be reduced in size by removing the non-essential threading structure, while the fastening component provides the necessary fixation function through its male thread that engages with the pocket's female thread.
Solution Approach 2:
The fixation system is segmented into two separate components: a simplified pressing member without the female thread portion, and a dedicated fastening component with the threading structure. This segmentation allows each component to be optimized independently, with the pressing member minimized in size and the fastening component providing all necessary engagement features.
2Quantity of substance
If the pressing member size is reduced to increase the number of cutting inserts, then the tool body size can be reduced and more cutting elements can be mounted, but the pressing member must still provide sufficient pressing force to secure the cutting insert
Solution Approach 1:
The wedge part acts as an intermediary mechanism that converts the axial pressing force from the fastening component into radial pressing force against the cutting insert. This wedge mechanism amplifies the pressing force, allowing a smaller pressing member to generate sufficient fixation force through geometric leverage rather than relying on the pressing member's own structural strength.
3Length of moving object
If the cutting inserts are made thinner to increase the number of inserts per tool body, then the tool body size is reduced, but the pressing member still occupies space that limits further reduction
Solution Approach 1:
By extracting the female thread portion from the pressing member, the pressing member's volume is minimized to only what is necessary for direct contact with the cutting insert and transmission of pressing force. This extraction removes the space-consuming threading structure that previously limited how thin the pressing member could be made.
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 an increase in the number of cutting elements mounted on the tool body and a reduction in the size of the tool body, while maintaining sufficient strength and fixation of the cutting elements.
Implementation Method 1
a pressing member (50) inserted into a pocket (12) of a tool body (10) for pressing and fixing a cutting insert (40) placed in a mounting part (13) of the pocket (12) onto a mounting surface (13a) of the mounting part (13)
Implementation Method 2
a pressure-receiving part (52) that is pushed into the pocket (12) in the insertion direction (D) by a fastening component (70) that is screwed into the pocket (12)
Data Source
AI summary
A pressing member is configured to be inserted into a pocket of a tool body for pressing and fixing a cutting insert placed in a mounting part of the pocket onto a mounting surface of the mounting part. The pressing member includes a wedge part having a contacting surface that comes into contact with an inner surface of the pocket, and a pressing surface that is in contact with the cutting insert. The pressing surface is formed so as to gradually come close to the contacting surface in an insertion direction into the pocket. The pressing member also includes a pressure-receiving part that is pushed into the pocket in the insertion direction by a fastening component that is screwed into the pocket.