Retractable Swing Stops for Stable Deep-Hole Gun Drilling
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Solution Overview
Problem
Existing gun drill machines face challenges in stabilizing the operation of gun drills during deep hole processing, particularly when dealing with hard materials and tight processing specifications, leading to issues like skipping rope and ballooning phenomena, and conventional swing stopping devices fail to maintain consistent swing stopping at equal positions.
Innovation Solution
The gun drill machine incorporates a plurality of swing stopping devices that can retract to avoid interference with the spindle unit, featuring a link type and slide type configurations with movable fingers to stabilize the gun drill at equal positions, allowing for a shorter gun drill length and stable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If a long gun drill is used to achieve deep hole processing, then the hole depth increases, but the gun drill becomes unstable and bends like a spindle during high-speed rotation
Solution Approach 1:
A swing stopping device is introduced as an intermediary component between the gun drill and the chip box. This device provides intermediate support points along the free zone, preventing the gun drill from bending like a spindle during high-speed rotation while enabling deep hole processing
2Stability of the object's composition
If a swing stopping device is arranged in the free zone to stabilize the gun drill, then gun drill stability improves, but the positions where swing stopping is regulated do not become equal positions due to spindle unit movement
Solution Approach 1:
The swing stopping device is designed with movable components including a movable finger unit and a movable support post that can shift axially. This dynamic configuration allows the swing stopping positions to remain equal and consistent even when the spindle unit moves during operation, maintaining both stability and precision
3Length of moving object
If the gun drill length is reduced to minimize margin dimension, then the device complexity decreases, but the gun drill cannot reach the required processing depth
Solution Approach 1:
The swing stopping device acts as a mediator that provides intermediate support along the processing path. This enables the use of shorter gun drills while achieving the same effective processing depth, as the swing stopping device compensates for the reduced gun drill length by providing additional support points
Data Source
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AI summary
[Problem to be solved] The problem to be solved is to develop a gun drill machine capable of shortening a margin dimension required in a gun drill as much as possible. [Solution] In a free zone Z between a chip box 3 and a moving spindle unit 2, a plurality of swing stopping devices 6 for loosely holding a gun drill 5 and suppressing the swing of the gun drill 5 are arranged, and each swing stopping device 6 is configured to freely retract from a steady action position where a swing stopping action is performed to avoid interference with the spindle unit 2 that moves in the free zone Z.