The Technologies Used in Electro-motor Spindle:
1. High-speed Bearing Technology -- High Speed electric spindles
Electro-motor Spindle is usually used multi ceramic bearings, with wear-resistant and heat-resistant, several times of life compared with traditional bearing. Sometimes electromagnetic suspend bearing and static hydrostatic bearing are adopted. No contact on inner and external rings, with umlimited life in therory.
2. High-speed Electrical Spindle Technology
The Electro-motor Spindle is a result of integration with electromotor and spindle. The motor rotor is the rotation part of the spindle. The spindle motor can also be regard as a high-speed electromotor in theory. The key technology is dynamic balancing under high speed.
3. Lubrication for High Frequency Electric Spindle Motor Technology
The lubrication of Electro-motor Spindle adopts timing quantitative lubrication with oil and gas generally. Electro-motor Spindle can use grease lubricating, but the corresponding speed should be at a discount. The so-called timing is that add oil at interval time. The so-called quantitative is that through a device named quantitative valve, precise control of the quantity of oil lubricants every time. Lubricating with oil and gas is referring to the lubricants is carried by compressed air to inbreathe ceramic bearings. Control of oil quantity is very important. Less would not serve any purpose on lubrication and more would reasult heat in high-speed rotation because of resistance from oil.
4. Cooling Device for Electro-motor Spindle
In order to disperse heat in runing High Speed electric spindles as soon as possible, usually circulate coolant on outer wall of Electro-motor Spindle . The cooling device is to maintain low temperature of the coolant.
5. Built-in Pulse Code
In order to achieve the ATC as well as rigid screw, Electro-motor Spindles built-in a pulse encoder in order to achieve the precise angle control and cooperation of feeding.
6. Automatic Tool Change Mechanism
In order to apply in machining center, Electro-motor Spindles equipped with ATC (auto tool changing) device, including the disc spring, pull cutter, oil tank etc.
7. Installation and Clip Mode of High-Speed Tool Cutter
Widely known BT, ISO tool cutter has been proved not suitable for high-speed processing Electro-motor Spindle in practice. Under these circumstances, there have been HSK, SKI, and other high-speed Electro-motor Spindle cutting tools.
8. High-frequency Conversion Device-- High Frequency Electric Spindle Motor
To achieve the speed of spindle motor to tens of thousands or even 10 million rotation per minute, a high-frequency Electric Spindle Motor conversion device must be used to drive the built-in high-speed Electro-motor Spindles . The frequency converter output should reach thousands of Hertz.
