Tap Collet Holder Structure for High Runout Accuracy
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Solution Overview
Problem
Conventional tap holders have a complex structure and lack high runout accuracy, which affects the precision and reliability of rigid tapping processes.
Innovation Solution
A tap holder design featuring a body with a collet holder hole, a tap collet with a tap mounting hole and sleeve hole, a torque transmission mechanism, and elastic bodies to stabilize the tap collet, ensuring high runout accuracy and synchronization of rotation and feed during rigid tapping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional tap holder structure is used, then the structure can accommodate the tap collet, but the structure becomes complex and runout accuracy decreases
Solution Approach 1:
The tap holder is divided into distinct functional segments: the body with collet holder hole, the tap collet with separate components (collet holder, collet, nut), and the torque transmission mechanism. This segmentation allows each part to be optimized independently for precision while simplifying the overall assembly and manufacturing process.
Solution Approach 2:
The tap collet components are nested within the body structure - the collet holder is received in the collet holder hole, the collet is mounted in the tapered hole, and the nut fastens on the external thread. This nested arrangement reduces overall complexity by integrating multiple functions into a compact hierarchical structure.
2Manufacturing precision
If elastic bodies are added to stabilize the tap collet, then runout accuracy improves, but the device complexity increases
Solution Approach 1:
The elastic bodies (first and second elastic bodies) are positioned at specific locations to control the axial position and stability of the tap collet. By strategically placing these elastic elements, the patent achieves runout accuracy without requiring complex active control systems or multiple stabilizing components throughout the structure.
Solution Approach 2:
The elastic bodies automatically adjust to maintain optimal contact between the tap collet and the body, providing self-stabilization during operation. This self-adjusting mechanism eliminates the need for additional complex control systems or manual adjustment mechanisms.
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 design provides a simple structure with high runout accuracy, enhancing machining precision and reducing the risk of screw thread collapse during high-speed rigid tapping.
Implementation Method 1
a first elastic body disposed between the body and the tap collet, the first elastic body configured to urge the tap collet toward distal end
Implementation Method 2
a second elastic body disposed between the sleeve and the tap collet, the second elastic body configured to urge the tap collet toward basal end
Data Source
AI summary
A tap holder having a simple structure and high runout accuracy is provided. A tap holder includes: a body having a collet holder hole having an opening toward distal end; a tap collet received in the collet holder hole, the tap collet having a tap mounting hole located at a distal end portion, and a sleeve hole located at a basal end portion; a torque transmission mechanism that transmits rotation of the body to the tap collet; a first elastic body disposed between the body and the tap collet to urge the tap collet toward distal end; a sleeve disposed to the body by received in the sleeve hole to prevent the tap collet from slipping off toward distal end; and a second elastic body disposed between the sleeve and the tap collet to urge the tap collet toward basal end.