Electric spindle technical device of plate bending machine

Release time：2021-10-12　　　　 Browse times

High speed motor technology: motorized spindle is the product of the integration of motor and spindle. The rotor of motor is the rotating part of spindle. In theory, motorized spindle can be regarded as a high-speed motor. The key technology is dynamic balance at high speed;

High speed bearing technology: motorized spindle usually adopts composite ceramic bearing, which is wear-resistant and heat-resistant, and its service life is several times that of traditional bearing; Sometimes electromagnetic suspension bearing or hydrostatic bearing is also used, the inner and outer rings are not in contact, and the service life is unlimited in theory;

Lubrication: regular and quantitative oil-gas lubrication is generally adopted for the lubrication of motorized spindle; Grease lubrication can also be used, but the corresponding speed should be discounted. The so-called timing is to inject oil every certain time interval. The so-called quantitative is to accurately control the amount of lubricating oil each time through a device called quantitative valve. Oil air lubrication refers to that the lubricating oil is blown into the ceramic bearing under the carrying of compressed air. Oil quantity control is very important, too little, can not play the role of lubrication; Too many rotary vane vacuum pumps will generate heat due to oil resistance when the bearing rotates at high speed.

Built in pulse encoder: in order to realize automatic tool change and rigid thread tapping, a pulse encoder is built in the motorized spindle to realize accurate phase angle control and coordination with feed.

Cooling device: in order to dissipate heat to the high-speed motorized spindle as soon as possible, circulating coolant is usually supplied to the outer wall of the motorized spindle. The function of the cooling device is to maintain the temperature of the coolant.

Automatic tool change device: in order to be applied to the machining center, the motorized spindle is equipped with an automatic tool change device, including disc spring, broach cylinder, etc;

High frequency frequency conversion device: to realize the speed of tens of thousands or even hundreds of thousands of revolutions per minute of the motorized spindle, a high frequency conversion device must be used to drive the built-in high-speed motor of the motorized spindle, and the output frequency of the frequency converter must reach thousands or thousands of Hertz.

Clamping mode of high-speed cutting tools: the widely familiar BT and ISO cutting tools have been proved not to be suitable for high-speed machining. In this case, HSK, ski and other high-speed tools appear.