The AC motor type test bench is a broad category, with many types of motors, including low-speed motors and high-speed AC motors.
Electric spindle: Electric spindle is a new technology developed in the CNC field in recent years, which combines linear motor and high-speed tool technology, bringing high-speed cutting technology to a new stage. Electric spindle is a group composed of electric spindle and its ancillary components, including electric spindle, high-frequency frequency converter, oil mist lubricator, cooling device, built-in encoder, and tool changer.
Electric spindle technology: high-speed bearing technology: generally uses ceramic composite bearings, which have good wear resistance and heat resistance, and can increase the service life by several times; Some can also choose electromagnetic floating or static pressure bearings, which have no contact between the inside and outside, and theoretically have an infinite service life;
High speed motor technology: Electric spindle is composed of a motor and a spindle, and the rotor of the motor is the rotating component of the spindle. In theory, electric spindle can be regarded as a high-speed motor. Its core technology is high-speed dynamic balancing;
Lubrication: Typically, oil and natural gas are used for timed and quantitative lubrication; You can also use grease lubrication, but the speed should be reduced. The so-called timing refers to injecting fuel into a specific time within a specified period of time. Quantitative refers to the use of measuring devices to accurately control the amount of oil each time. Oil and natural gas lubrication, on the other hand, involves sending lubricating oil into ceramic bearings through compressed air. The control of engine oil is very important, if it is too little, it will lose its lubrication effect; When the bearing speed is too high, high temperature will be generated due to the resistance of lubricating oil.
Cooling equipment for AC motor type test bench: In order to quickly dissipate heat from the high-speed running electric spindle, coolant is generally introduced into the outer wall of the electric spindle to maintain it within a certain temperature range.
Built in pulse encoder: To achieve automatic tool changing and hard threading, the electric spindle is equipped with a pulse encoder that can control the phase and coordinate with the feeding.
Automatic tool changing mechanism: To be suitable for processing, the electric spindle is equipped with automatic tool changing mechanisms such as disc springs and tension oil cylinders;
The clamping method of high-speed cutting tools: widely used BT and ISO cutting tools have been proven to be unsuitable for high-speed cutting. In this context, high-speed cutting tools such as HSK, SKI, etc.
High frequency frequency conversion equipment: In order to achieve a speed of tens of thousands or even hundreds of thousands of revolutions per minute for the electric spindle, a high-frequency frequency converter is needed to make the speed of the electric spindle reach thousands to thousands of hertz.