Multifunction Tool Holder Assembly with Helical Chip Groove
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Solution Overview
Problem
Existing tool holder assemblies for multifunctional machining, such as drilling, boring, and turning, face challenges with chip discharge, vibration, and rigidity issues, particularly in small-sized holders, and require additional tool holders and setup time, affecting productivity and precision.
Innovation Solution
A tool holder assembly with a cylindrical body, a helical chip groove for efficient chip discharge, and an adapter for precise cutting edge height adjustment, featuring a hexahedral cutting insert with sloped surfaces and a cooling water tube, along with a locking mechanism for secure mounting, ensuring adequate chip groove space and maintaining tool holder rigidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If two cutting inserts are disposed asymmetrically in a tool holder pocket for drilling, then chip discharge is improved, but manufacturing precision deteriorates due to unbalance of cutting inserts
Solution Approach 1:
The patent applies asymmetry by positioning the single cutting insert off-center in the tool holder pocket, specifically at a location optimized for drilling operations. This asymmetric positioning allows the chip groove to be strategically placed for effective chip evacuation while maintaining balance through careful design of the cutting insert geometry and holder structure.
Solution Approach 2:
The patent implements multi-functionality by designing a single cutting insert with multiple cutting edges that can perform drilling, boring, facing, and turning operations. The insert is positioned and oriented to enable these diverse functions, eliminating the need for multiple specialized inserts while maintaining machining precision through consistent reference to the holder's center line.
2Adaptability or versatility
If a small sized insert type tool holder is used for drilling small holes, then adaptability is improved, but rigidity deteriorates due to difficulty in disposing cutting inserts
Solution Approach 1:
The patent applies local quality by concentrating the cutting functionality in a single, precisely positioned insert with optimized local geometry rather than distributing multiple inserts. The cutting insert features localized chip formers and specific edge configurations tailored for small hole drilling, maintaining rigidity through a compact, unified structure.
Solution Approach 2:
The patent segments the cutting functions into distinct edges on a single insert, with each edge optimized for specific operations. The insert is divided into functional zones including cutting edges, chip formers, and relief surfaces, allowing small-sized holder design while maintaining adequate rigidity through efficient space utilization.
3Adaptability or versatility
If additional tool holders are used for boring, facing, and turning operations, then adaptability is improved, but productivity deteriorates due to additional inventory and setting time
Solution Approach 1:
The patent implements universality by designing a single cutting insert with multiple cutting edges capable of performing drilling, boring, facing, and turning operations. The insert geometry includes edges positioned and oriented for each operation type, allowing one tool holder to replace multiple specialized holders, eliminating inventory requirements and setup time changes.
Solution Approach 2:
The patent merges multiple cutting functions into a single integrated cutting insert. The insert combines drilling edges, boring edges, facing edges, and turning edges in one component, allowing all operations to be performed without changing tool holders or inserts, thereby significantly improving productivity by eliminating tool changes and setup procedures.
4Adaptability or versatility
If additional tool holders and turret settings are made for multiple operations, then adaptability is improved, but time consumption increases due to holder setting time period
Solution Approach 1:
The patent implements universality by designing a single cutting insert with multiple cutting edges capable of performing drilling, boring, facing, and turning operations. The insert geometry includes edges positioned and oriented for each operation type, allowing one tool holder to replace multiple specialized holders, eliminating inventory requirements and setup time changes.
Solution Approach 2:
The patent enables continuity of useful action by allowing all machining operations to be performed with the same cutting insert without removal or repositioning. The continuous use of the same insert maintains consistent reference geometry and eliminates the interruption of tool changes, reducing cycle time and maintaining operational continuity throughout the machining process.
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 effective chip discharge, minimizes vibration, and maintains tool holder rigidity, enhancing machining quality and productivity by eliminating interference between facing and turning operations and allowing for precise cutting edge positioning.
Implementation Method 1
a cooling water tube started from an end part of a shank part, extended throughout entire tool holder in a form of a straight line, and sloped at an end part of the head part to face an outer nose of the cutting insert
Implementation Method 2
a chip groove started from the head part and extended to a rear side of the tool holder body for serving as a moving passage of chips
Data Source
AI summary
Tool holder assembly (TH) for multifunctional machining, such as drilling, boring, facing, and turning, eliminate interference between facing and turning, and secure an adequate chip groove space (10) for discharging chips therethrough without deterioration of a rigidity of the tool holder (TH), thereby securing a good quality of machining, and an exclusive adapter (TA) suitable to the foregoing tool holder (TH) assembly for multifunctional machining.