Polishing Machine Vibration Reduction via Dual Guide Rollers
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Solution Overview
Problem
Conventional polishing machines experience significant vibration due to collisions between a guide roller and the abrasive holding member's groove, caused by the guide roller engaging only one side surface at a time, leading to clearance and continuous collisions during high-speed operation.
Innovation Solution
A polishing machine design featuring a pair of guide members positioned on opposite sides of the radial axis to maintain continuous contact with the abrasive holding member's movement restricting part, reducing vibration by eliminating clearance and distributing the load across the guide members and the abrasive holding member, with optional elastic engagement surfaces to absorb vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single guide roller is used to engage the groove, then the structure is simple, but collision occurs between the guide roller and the groove side surface causing vibration
Solution Approach 1:
The single guide roller is divided into two separate guide rollers (first and second guide rollers) positioned on opposite sides of the radial axis. Each guide roller engages with its own side surface of the groove, segmenting the engagement function to eliminate collision and vibration while maintaining structural simplicity.
2Ease of operation
If the guide roller diameter is set smaller than the groove breadth, then the guide roller can rotate smoothly, but clearance is formed causing collision during movement
Solution Approach 1:
The solution transitions from a single-dimensional engagement (one guide roller on one side) to a two-dimensional symmetric engagement (two guide rollers on opposite sides). This dimensional change allows both guide rollers to maintain contact with their respective groove side surfaces simultaneously, eliminating clearance-induced collision while preserving smooth rotation.
3Speed
If the guide roller engages only one side surface at a time, then rotation is smooth, but continuous collision occurs during high-speed operation
Solution Approach 1:
The invention introduces asymmetric positioning of the two guide rollers relative to the radial axis, with each roller engaged with a different side surface of the groove. This asymmetric arrangement ensures that as the abrasive holding member rotates, both guide rollers maintain continuous contact with their respective sides, preventing the periodic collision that occurs with single-side engagement during high-speed operation.
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 solution effectively reduces vibration and stress on the abrasive holding member, preventing breakage and ensuring stable contact between the abrasive material and the workpiece during polishing, while maintaining smooth engagement and reducing friction.
Implementation Method 1
a pair of guide members mounted in the body part at respective positions away from the rotational drive center axis to engage the movement restricting part
Implementation Method 2
the guide member or the movement restricting part is formed of an elastic member
Data Source
Figure 1~2
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Figure 5~7
AI summary
[Technical Problem] An object is to provide a polishing machine capable of reducing vibration. [Solution to Problem] A polishing machine (10) has an abrasive holding member (16) mounted to a drive shaft (22) rotationally driven by a vane air motor (18) such that the abrasive holding member (16) is rotatable about an eccentric axis (25) relative to a rotational drive center axis (24) of the drive shaft (22). The abrasive holding member (16) has a movement restricting part (40) provided at a position away from the eccentric axis in the direction of a radial axis (38) that is radial to the eccentric axis. A pair of guide rollers (42) and (43) provided in a body part (12) are disposed so that a first engagement position where one guide roller (42) and the movement restricting part engage each other and a second engagement position where the other guide member (43) and the movement restricting part engage with each other are located on the laterally opposite sides of the radial axis (38), facing each other across the radial axis, to restrict movement of the abrasive holding member (16) so that, when the drive shaft (22) is rotationally driven, the abrasive holding member (16) is displaced in the direction of the radial axis (38), while pivoting about a point between the first engagement position and the second engagement position.