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Hot-isostatic pressure silicon nitride all-ceramic electric main shaft and its mfg. method

A silicon nitride full, hot isostatic pressing technology, used in the manufacture of tools, maintenance and safety accessories, clamping and other directions, can solve the problems affecting the machining accuracy of the spindle, thermal deformation of the spindle, spindle damage, etc., to achieve simple lubrication and machining. High precision and life-enhancing effect

Active Publication Date: 2008-11-26
沈阳建筑大学工厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The multiple supporting bearings of the spindle and the motor rotor in the high-speed rotation state are the main heat sources for the multiple sections of the electric spindle, which will directly cause thermal deformation of the spindle, affect the machining accuracy of the spindle, and even burn the bearings seriously, resulting in damage to the spindle

Method used

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  • Hot-isostatic pressure silicon nitride all-ceramic electric main shaft and its mfg. method
  • Hot-isostatic pressure silicon nitride all-ceramic electric main shaft and its mfg. method
  • Hot-isostatic pressure silicon nitride all-ceramic electric main shaft and its mfg. method

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Embodiment Construction

[0024] The present invention is described in detail below in conjunction with accompanying drawing:

[0025] As shown in the figure, the all-ceramic electric spindle of the present invention includes a ceramic spindle 6, a ceramic ferrule 3, a ceramic ball 2, a stator 4, a rotor coil 5, a preload spring 8, a linear bearing 7, a sleeve, a cooling system, a front , rear end cover, pipe joint, gasket and sealing ring, the present invention uses hot-pressed silicon nitride material to make the main shaft and rolling bearing, wherein the rolling elements in the rolling bearing are also made of hot-pressed silicon nitride ceramic material, which can be assembled Type angular contact ceramic ball bearing, in which the ceramic ferrule 3 is fixed in the bearing seat of the motorized spindle sleeve, and the stator is fixed on the sleeve. When the current from the frequency converter enters the stator, an alternating magnetic field is generated back to The rotor coil 5 is driven to rotat...

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Abstract

An electric full-ceramic mainshaft made up of SiN ceramic by hot isostatic pressing is composed of ceramic mainshaft, ceramic sleeve ring, ceramic bearing, pre-stressed spring, sleeve pipe, winding for rotor, and stator. Its manufacture includes such steps as coarse grinding, semi-fine grinding, fine grinding, and polishing. It has high accuracy, high rotation speed and light weight.

Description

technical field [0001] The invention relates to a mechanical assembly part and a manufacturing method thereof, in particular to a high-speed and high-precision hot-pressed silicon nitride ceramic electric spindle and a manufacturing method thereof. Background technique [0002] As the most critical core functional component of the machine tool, the spindle unit is the key part that determines the high speed and high precision of the machine tool, and is always the basis for the development of machine tool technology. To achieve ultra-high speed machining, the D of the spindle m The value of n should be at least 1×10 6 above, and has the characteristics of high power and wide speed range. The most suitable form of spindle for ultra-high speed operation is the electric spindle. The electric spindle has the advantages of compact structure, light weight, small inertia, good dynamic characteristics, etc. It can realize the "zero transmission" of the machine tool spindle system...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23B19/02B23Q3/12B23Q11/12B24B5/50B24B11/02B24B19/06
Inventor 吴玉厚李颂华
Owner 沈阳建筑大学工厂