The scroll bearing application on the machine tool

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  • source:TAMIKO CNC Machining
Scroll bearing basically uses at in the use on the machine tool following 3 place: Guide screw of main shaft, ball and general transmission shaft. The fundamental form a complete set that main shaft bearing regards a machine tool as, precision of the rotate speed that its function affects a machine tool directly, circumgyrate, rigid, fight flutter to move cutting function, noise, temperature rise and heat to be out of shape etc, quality of the precision that affects treatment part then, surface. Accordingly, high-powered machine tool must deserve to use high-powered bearing. General component is the precision of scroll bearing P0, P6, P5, P4 and P2 5 grade, the bearing precision that is used on main shaft of accurate machine tool should reach its above level for P5, and the main shaft bearing of the high speed such as machine tool, machining center, tall to numerical control accurate machine tool, need to choose P4 to reach its to exceed accurate bearing with superior. The machine tool includes deep trench ball bearing, horn to contact horn of bearing of ball bearing, columnar roller, two-way thrust to contact bearing of ball bearing, tapered roller and thrust normally with main shaft bearing the type of 6 kinds of structures such as bearing. As the rapid development of numerical control technology, "Compound, high speed, intelligence, nicety, environmental protection " the main trend that already made progress of technology of current machine tool industry. Among them, the treatment efficiency that high speed treatment improves a machine tool effectively, shorten the treatment of workpiece is periodic. This reachs the requirement that the component wants to get used to high speed to machine related its with respect to main shaft of requirement machine tool. Current, bearing of main shaft of numerical control machine tool basically is restricted to contact horn of bearing of ball bearing, columnar roller, two-way thrust to contact ball bearing and tapered roller bearing to wait for type of 4 kinds of structures in horn surely. Companion changes development to high speed as main shaft of numerical control machine tool, material of pottery and porcelain (basically point to Si3N4 project pottery and porcelain) because have density,small, stretch model measures tall, hot coefficient of expansion small, wear-resisting, high temperature resistant, anti-corrosive wait for good performance, make the good material of bearing of nicety of production high speed thereby. Bearing of pottery and porcelain receives wider and wider application, in view of the difficult processability of material of pottery and porcelain, bearing of accurate pottery and porcelain is scroll body more is the ball bearing of mixture pottery and porcelain that ferrule of pottery and porcelain, inside and outside still makes by chromium steel. Ball guide screw deputy the transmission component that serves as nicety, efficient, delicacy, besides the guide screw that should use high accuracy, nut and ball, still should notice to choose axial stiffness moment of force of tall, attrition the bearing with tall precision of small, movement. Aux used to of bearing of ball guide screw contacts bearing of ball bearing, tapered roller, needle roller and thrust roller to combine ball bearing of ball bearing of bearing, deep trench and thrust to wait with two-way thrust horn. Current, bearing of ball guide screw uses the sheet that most is horn of 60 ° contact to list thrust horn to contact ball bearing, and, accuracy class also is with P4 and its above class is given priority to. The machine tool uses the outfit roll on general transmission shaft bearing, its ask and choose as identical as bearing of common and mechanical drive, need to satisfy intensity and life requirement only, the bearing limited speed that rotate speed does not set more than can. Connecting general reason condition to fall, the machine tool bearing that we mention is to point to bearing of machine tool main shaft and bearing of ball guide screw, bearing of accurate machine tool is to show precision is the main shaft bearing of P5 and class of its P5 above and guide screw bearing. CNC Milling CNC Machining