Knowledge of component of main shaft of numerical control machine tool is shared

Dispatch of net of machine tool of Chinese numerical control: The precision of component of main shaft of numerical control machine tool, stiffness and heat are out of shape to treatment quality has immediate effect. Because machine,machine tool of incorrect numerical control undertakes be adjustmented artificially in the process, these effects are more accordingly serious. At present the main shaft miller of numerical control machine tool should have 3 kinds of type. Around is propped up before using 　 of different bearing 　 , prop up use biserial afferent thrust ball bearing combines bearing of short columnar roller and biserial of contact of 60 ° horn, prop up after use ball bearing of didymous and afferent thrust. This configuration form makes the integrated stiffness of main shaft rises substantially, can satisfy puissant the demand that cuts bits, because this applies generally at machine tool of of all kinds numerical control. Bearing uses high accuracy biserial before afferent thrust ball bearing the performance when high speed of ball bearing of 　 　 afferent thrust is good, top rotate speed can amount to main shaft 4000r/min. But, its carrying capacity is small, apply to consequently carry high speed, gently and close together numerical control lathe. Biserial and sheet list 　 of 　 of tapered roller bearing radial of this kind of bearing and axial stiffness are tall, can bear heavy load, can bear especially stronger move load, installation and adjust function it may not be a bad idea. But, this kind of bearing restricted the top rotate speed of main shaft and precision, because this uses the numerical control machine tool of medium precision, low speed and burden. On the orgnaization of main shaft, the fixed position of bearing of the discharge carry on one's shoulder that wants the outfit clip that treats good chuck and tool carrier, main shaft, main shaft and clearance are adjusted, of main shaft component lubricate and sealed and on craft other a series of problems. Be opposite to reduce heat of temperature rise of main shaft component to be out of shape as far as possible the influence of precision of machine tool job, the circulatory system that uses lubricating oil normally takes away the quantity of heat of main shaft component, make main shaft component and casing maintain constant temperature. Appropriative refrigeration device is used on boring of certain numerical control, milling machine, idealer realized temperature control. In recent years, the main shaft bearing of machine tool of certain numerical control uses advanced oil, with seal means to undertake lubricating, every add grease to be able to be used 7 years to 10 years. Mix to make lube and grease are not sent, use labyrinthian and sealed means normally. To main shaft of numerical control lathe, because the dynamical chuck of structural ponderosity and clamp oil cylinder are being installed in its two end, so main shaft stiffness must rise further, should design reasonable join end, in order to improve the join stiffness that dynamical chuck and main shaft end spend. CNC Milling