Built-In Supersonic Spindle With Synchronized Bearing Vibration
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Solution Overview
Problem
Conventional built-in type spindles experience bearing damage and reduced machining accuracy due to unbalanced vibration transmission, where only the spindle is vibrated while the bearing remains stationary.
Innovation Solution
A built-in type supersonic spindle with a housing containing a supersonic vibrator that transmits vibration to both the spindle and bearing, utilizing magnetic levitation units to maintain a stable interval and a preload adjusting mechanism to prevent bearing damage, allowing simultaneous vibration and rotation of the spindle and bearing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If only the spindle is vibrated while the bearing remains stationary, then machining period is reduced and tool lifespan is expanded, but bearing damage occurs and machining accuracy deteriorates
Solution Approach 1:
The patent merges the vibration function into the integrated spindle unit, making the spindle and bearing move together as a unified system. The excitation part vibrates the spindle unit housing, which transmits vibration to both the spindle and bearing simultaneously, eliminating the harmful scenario where only the spindle vibrates while the bearing remains stationary.
Solution Approach 2:
The patent makes the bearing dynamic by enabling it to vibrate together with the spindle through the integrated spindle unit design. The bearing is no longer stationary but moves synchronously with the spindle, preventing relative motion stress and damage while maintaining the productivity benefits of supersonic vibration.
2Productivity
If only the spindle is vibrated while the bearing remains stationary, then supersonic machining effects are achieved, but machining accuracy deteriorates
Solution Approach 1:
The patent combines the spindle and bearing into an integrated spindle unit where both components vibrate together. This merging ensures that the bearing does not remain stationary while the spindle vibrates, thereby preventing the deterioration of machining accuracy while preserving the supersonic machining benefits.
3Productivity
If the supersonic vibrator is disposed outside the housing, then vibration can be transmitted to the spindle, but the interval between housing and spindle is unstable causing bearing damage
Solution Approach 1:
The patent nests the supersonic vibrator inside the housing as part of the integrated spindle unit. This nested arrangement ensures stable spacing and fixed positional relationships between components, eliminating the instability caused by external placement while maintaining effective vibration transmission to the spindle.
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
Prevents bearing damage and enhances machining accuracy by ensuring synchronized vibration and rotation of the spindle and bearing, thereby improving machining efficiency.
Implementation Method 1
a magnetic levitation unit disposed between the housing and the built-in spindle unit to make the built-in spindle unit float inside the housing
Implementation Method 2
the supersonic vibrator gets in contact with the built-in spindle unit in order to transmit vibration generated from the supersonic vibrator to the built-in spindle unit
Data Source
AI summary
The present invention relates to a built-in type spindle, and more particularly, to a built-in type supersonic spindle, which includes a housing having a built-in spindle unit therein and a supersonic vibrator pressing the built-in spindle unit in order to enhance machining accuracy and reduce a damage of a bearing by vibrating a spindle and the bearing at the same time, and an excitation method using the built-in type supersonic spindle.