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Skills blended by electric spindles
Source: Bearing network time: 2018-02-24
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The electric spindle is a new skill that combines the spindle of the machine tool with the spindle motor in the field of CNC machine tools for several years; it is combined with the skills of linear motor and high-speed tool; it will bring high-speed machining to a new era. The electric spindle is A set of components; it contains the electric spindle itself and its accessories: electric spindle, high frequency frequency conversion equipment, oil mist smoother, cooling equipment, built-in encoder, tool change equipment.
Skills blended by electric spindles:
High-speed bearing skills: electric spindles generally use composite ceramic bearings; wear-resistant heat; life is several times that of traditional bearings, sometimes also use electromagnetic suspension bearings or static pressure bearings; inner and outer rings do not touch; theoretically unlimited life,
High-speed motor skill: The electric spindle is the product of the motor and the spindle; the rotor of the motor is the rotation of the spindle; in theory, the electric spindle can be regarded as a high-speed motor. The key skill is the dynamic balance at high speed.
Smooth: The smoothness of the electric spindle is generally selected from punctual quantitative oil and gas smoothness, and the grease can be selected to be smooth; but the corresponding speed should be discounted. The so-called punctuality; that is, the oil is injected once every certain time. The so-called quantitative; Valve equipment; precisely manipulates the amount of oil per smooth oil. The oil and gas is smooth; it means that the smooth oil is carried under the compressed air; it is blown into the ceramic bearing. The oil quantity control is very important; too little; not smooth The effect is too much; when the bearing rotates at high speed, it will heat up due to the resistance of the oil.
Cooling equipment: in order to quickly heat the high-speed operation of the electric spindle; generally the outer wall of the electric spindle is connected with circulating coolant; the effect of the cooling equipment is to adhere to the temperature of the coolant.
Built-in pulse encoder: In order to complete the active tool change and rigid tapping; the electric spindle has a built-in pulse encoder; to achieve precise phase angle control and cooperation with the feed.
Active tool changer: for application in the middle of machining; electric spindle is equipped with active tool changer; including disc spring, broach cylinder, etc.
High-speed tool loading method: widely known BT, ISO tool; has been proved to be not suitable for high-speed machining. In this case, HSK, SKI and other high-speed tools are presented.
High-frequency frequency conversion equipment: To complete the electric spindle tens of thousands or even hundreds of thousands of revolutions per minute; it is necessary to use a high-frequency inverter equipment to drive the built-in high-speed motor of the electric spindle; the output frequency of the inverter must reach thousands or several Kilohertz.
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