Machine Tool Spindle Air Seating Check for Thin Debris Detection
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Solution Overview
Problem
Existing main spindle devices face a tradeoff between detecting thin foreign matter quickly and preventing the outlet of the air supply flow channel from being blocked, which can lead to incorrect seating judgments.
Innovation Solution
The main spindle device incorporates an annular recess with a shallow first section and a deeper second section, allowing for efficient detection of thin foreign matter while minimizing the risk of the outlet being blocked.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the depth of the annular groove is made shallower to detect thin foreign matter quickly, then the detection speed improves, but the outlet of the air supply flow channel becomes easily blocked by foreign matter
Solution Approach 1:
The annular groove is segmented into two sections with different depths: a first section with shallower depth for quick detection of thin foreign matter, and a second section with deeper depth to prevent outlet blockage. This segmentation allows each section to fulfill its specific function while resolving the contradiction between detection speed and blockage resistance.
Solution Approach 2:
Different sections of the annular groove are given different local qualities (depths) to perform different functions. The shallower first section enables quick detection, while the deeper second section provides blockage prevention, allowing the system to optimize both detection speed and reliability simultaneously.
2Reliability
If the depth of the annular groove is made deeper to prevent outlet blockage, then the reliability improves, but the detection time increases
Solution Approach 1:
The annular groove is divided into two sections with different depths: the first section with shallower depth enables quick detection, while the second section with deeper depth prevents blockage. This segmentation resolves the contradiction by assigning different functional depths to different sections.
Solution Approach 2:
Different sections of the annular groove have different local qualities (depths) optimized for their specific functions. The shallower first section provides fast detection, while the deeper second section ensures reliability, allowing the system to achieve both quick detection and blockage prevention simultaneously.
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
This configuration enables reliable and rapid detection of even thin foreign matter, preventing incorrect seating judgments without increasing the time required for confirmation.
Implementation Method 1
Compressed air is supplied from the inside of the main spindle through an air supply flow channel, and the pressure of the air inside the air supply flow channel is detected
Implementation Method 2
the pressure of the air inside the air supply flow channel is detected
Data Source
Figure 1(A)~1(B)
Figure 2
Figure 3(A)~3(B)
AI summary
A main spindle device (10) for a machine tool that checks the seating of a tool holder (30) using compressed air, wherein the main spindle device (10) for a machine tool comprises: a main spindle (12) that has a distal end face (18) in close contact with a flange end of the tool holder (30); an annular recess (25) that is formed on the distal end face (18) of the main spindle so as to be covered by the flange end of the tool holder; an air supply flow channel (21) that is linked to the annular recess and that supplies compressed air to the annular recess; a compressed air source (23) that supplies air to the air supply flow channel; and a pressure detector (22) that detects the pressure of the compressed air in the air supply flow channel. The annular recess (25) has a first section (25a) and a second section (25b) that is deeper than the first section, and the air supply flow channel is opened to the second section (25b).