Hydrostatic Slide Device with Four-Surface Bearing
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Solution Overview
Problem
Conventional hydrostatic slide devices with hydrostatic bearings on six surfaces face challenges in maintaining precise intervals, leading to increased complexity and difficulty in size reduction, which compromises machining precision in grinding devices.
Innovation Solution
A hydrostatic slide device configuration with hydrostatic bearings formed on fewer surfaces, utilizing a guide portion with reference and movable guide members and hydrostatic pads, and an orifice-based pressure regulation system to ensure precise and stable reciprocal movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hydrostatic bearings are formed on six surfaces to enable reciprocal movement of the supported member, then the supported member can be supported stably, but the device complexity increases and the size reduction becomes difficult
Solution Approach 1:
The invention extracts the hydrostatic bearing function from six surfaces and concentrates it on only four surfaces (the four lateral surfaces of the rectangular parallelepiped-shaped supported member). By removing the unnecessary vertical surface bearings, the configuration is simplified while the reciprocal movement stability is maintained through the four lateral bearings working together.
Solution Approach 2:
The invention adopts an asymmetric configuration where hydrostatic bearings are formed on four lateral surfaces rather than symmetrically on all six surfaces. This asymmetric arrangement reduces complexity while maintaining the necessary support functionality for reciprocal movement in the horizontal direction.
2Ease of operation
If hydrostatic bearings are formed on six surfaces to enable reciprocal movement, then the supported member can move reciprocally, but the intervals of hydrostatic portions cannot be uniformly held with high precision
Solution Approach 1:
By removing the vertical surface bearings from the six-surface configuration, the invention reduces the number of intervals that need to be precisely controlled. Only the four lateral surface intervals need to be uniformly held, which is more achievable with high precision than controlling six surface intervals.
Solution Approach 2:
The invention concentrates the hydrostatic bearing function on the four lateral surfaces where reciprocal movement occurs, ensuring high precision interval control in these critical areas while eliminating the need for precise interval control on the vertical surfaces that do not contribute to reciprocal movement.
3Reliability
If hydrostatic bearings are formed on six surfaces, then the supported member can be supported, but the device size cannot be reduced
Solution Approach 1:
The invention extracts and removes the unnecessary vertical surface bearings from the six-surface configuration, reducing the overall device volume. The four lateral surface bearings maintain the support capability for reciprocal movement while occupying less space.
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 simplifies the device structure, allows for size reduction, and enhances machining precision by uniformly holding hydrostatic bearing intervals, achieving stable and precise reciprocal movement.
Implementation Method 1
By disposing the orifice, pressure regulation of the recess is possible with a relatively simple structure
Implementation Method 2
various hydrostatic slide devices and the like that use hydrostatic bearings to enable reciprocal movement of grindstones
Data Source
Figure 1A~1B
Figure 2
Figure 3
AI summary
To make it possible to uniformly hold with high precision the interval of a hydrostatic bearing portion while reducing as much as possible the number of surfaces forming a hydrostatic bearing. In a first slide portion 101 that serves as a hydrostatic slide device, a guide portion 30 and a first linear motor 13 are disposed between a first base plate 11 and a first table plate 12, the guide portion 30 has first and second reference guide members 31a and 31b that are disposed on a horizontal surface of the first base plate 11 and first and second movable guide members 32a and 32b that are disposed on the first table plate 12 so as to face the first and second reference guide members 31a and 31b, hydrostatic pads 40 are formed between the first and second reference guide members 31a and 31b and the first and second movable guide members 32a and 32b, and hydrostatic bearings are formed between the first reference guide member 31a and the first movable guide member 32a by hydrostatic oil discharged from the hydrostatic pads 40.