Insert-Indexable Tool Head Member Fixation
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Solution Overview
Problem
Existing insert-indexable tools face issues with firm fixation of the head member to the holder, leading to potential shifting during cutting operations and compromised dimensional accuracy due to limited screw length and interference.
Innovation Solution
The design includes a head member with intersecting mount faces and a holder with corresponding receiving faces featuring non-intersecting fixing threaded holes, allowing for longer screws to be used, ensuring firm fixation and reducing the risk of head member shifting by distributing cutting forces effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the head member is firmly fixed to the holder using fixing screws, then the cutting accuracy is improved, but the screw length is limited due to interference between screws disposed in intersecting planes
Solution Approach 1:
The patent transitions from a two-dimensional planar arrangement of fixing screws to a three-dimensional configuration where threaded holes are arranged in multiple directions (first, second, and third directions). This spatial dimensionality change allows screws to be positioned without interference while maintaining adequate length for firm fixation of the head member to the holder, thereby ensuring cutting accuracy.
2Strength
If the threaded holes are positioned close to the insert to receive cutting force, then the fixation strength is improved, but the screw length becomes insufficient due to interference in intersecting planes
Solution Approach 1:
The patent resolves the conflict between positioning threaded holes close to the insert for strength and maintaining sufficient screw length by introducing a three-dimensional arrangement. Threaded holes are distributed in first, second, and third directions, allowing some holes to be positioned near the insert to receive cutting forces while others are positioned to provide adequate screw length, eliminating interference issues.
Solution Approach 2:
The fixation system is segmented into multiple threaded holes arranged in different directions rather than relying on a few long screws. This segmentation allows the cutting forces to be distributed across multiple fixation points, with each screw optimized for its specific position and function, thereby achieving both strength and adequate length.
3Adaptability or versatility
If the head member is detachably mounted to the holder, then the adaptability is improved, but the fixation reliability may be compromised
Solution Approach 1:
The head member is segmented into a detachable component that can be mounted and removed from the holder. The segmentation includes multiple fixation interfaces with threaded holes arranged in multiple directions, ensuring that even when detachable, the connection achieves high reliability through distributed fixation points that securely hold the head member during cutting operations.
Data Source
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AI summary
An insert-indexable tool (100) includes: a holder (10); and a head member (30) having an insert mount seat (36) by which an insert (60) having a cutting edge (66) and a cutting face (67) is to be held, and mounted on a distal portion of the holder (10), wherein the head member (30) includes a first mount face (39) and a second mount face (42) intersect each other from a view facing toward the cutting face (67) in a state in which the insert (60) is held by the insert mount seat (36), the holder (10) includes, at the distal portion thereof, a first receiving face (17) abutting the first mount face (39) and a second receiving face (18) abutting the second mount face (42), the first receiving face (17) and the second receiving face (18) are respectively provided with a first fixing threaded hole (20A, 20B) and a second fixing threaded hole (21A, 21B) into which fixing screws (47) inserted into the first receiving face (17) and the second receiving face (18) are screwed, and the first fixing threaded hole (20A, 20B) and the second fixing threaded hole (21A, 21B) are located so that the fixing screws (47) screwed into the first and second fixing threaded holes (20A, 20B, 21A, 21B) do not intersect each other.