Mobile Tap Centering Mechanism for Vibration-Stable Threading
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Solution Overview
Problem
Conventional tapping machines experience significant vibrations during the threading process, leading to out-of-axis issues, imprecise machining, and frequent tool wear, resulting in low-quality products and increased rejects, especially when dealing with varied tool lengths and materials like stainless steel or aluminum.
Innovation Solution
An anti-vibration and centring device is introduced, mounted on a mobile frame that translates parallel to the tapping tool's longitudinal axis, constraining the tool radially while allowing free rotation, effectively minimizing vibrations and ensuring precise centring, even with tools of different lengths, by integrating with existing tapping machines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed anti-vibration and centring device is mounted on the base of the machine, then the device structure is simple, but it is not adaptable to different tool lengths and shaft lengths, resulting in non-optimal centring and anti-vibration operations
Solution Approach 1:
The anti-vibration and centring device is made mobile rather than fixed, allowing it to translate along guides parallel to the tapping tool axis. This dynamic positioning capability enables the device to adapt to different tool lengths and shaft lengths while maintaining optimal centring and anti-vibration performance, resolving the contradiction between adaptability and structural simplicity.
2Manufacturing precision
If the anti-vibration and centring device is fixed in position, then the device structure is simple, but it cannot optimally serve tools with varying lengths, leading to reduced machining quality
Solution Approach 1:
The device incorporates a mobile frame that can translate along guides, enabling dynamic adjustment of the device position relative to the tapping tool. This allows optimal centring and anti-vibration operation for tools of varying lengths, thereby improving machining quality without requiring an overly complex fixed structure.
Solution Approach 2:
The mobile frame acts as an intermediary between the fixed base and the tapping tool, providing the necessary flexibility to accommodate different tool lengths while maintaining precise centring and anti-vibration control during the machining process.
3Object-affected harmful factors
If the tapping tool is constrained radially during rotation, then vibrations are reduced and centring is improved, but the device complexity increases due to the mobile frame and translation mechanism
Solution Approach 1:
The device uses a mobile frame with translation capability that can dynamically position the centring mechanism at the optimal location along the tool axis. This dynamic approach reduces vibrations effectively while avoiding the need for a completely complex fixed multi-component structure, as the same components serve multiple positions.
Data Source
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AI summary
A tapping machine (10), for tapping perforated products such as nuts (14), bushings or the like, comprises a spindle (11) on the longitudinal axis (12) of which a tapping tool (13) is rotatably mounted which tapping tool (13) is provided with a stem (21) having a longitudinal axis and a head having a threading to be inserted inside an appropriate hole provided in a nut (14) to be threaded, as well as pusher devices (16) for pushing a nut (14) against the threading surface of the tapping tool (13). Said machine further comprises an anti-vibration centring group (19) which acts on the stem of the tapping tool (13), substantially constraining the tapping tool (13) in a radial direction, preventing a de-alignment of the longitudinal axis (12) of the stem of the tapping tool and maintaining freedom of rotation thereof. Said anti- vibration centring group (19) is selectively movable along the stem of the tapping tool (13) in a parallel direction to the longitudinal axis of said stem (21).