关键字：同步带 滚珠丝杠 胀套 螺母 粗糙度 配合
Summary
Process the fast development of the profession along with the machine,Is more and more high to equipments of machine tool request,NC machine toolalready extensive applied,output of it is growing rapidly.
1.In the system of machine tool for transmitting devise,belting in step have applicated more and more wide.Because it spread the friction moving improvement as the wheel gear moving,avoid beating to be slippery,moving is accurate,the efficiency is high,the ratio is big,the power is high.Xow they have already in first standarded.Gears and beltings in step may purchase directly.
2.The shaft is used to accept the turn-over spare parts or to deliver powered motion and the motve in time.the axial construction design is to makes sure the axial shape and all sizes constructions.The factors influencing The axial construction are many,such as stalk at gearing in the machine position with form、Function or charge on the stalk is the kind and the sizes of it、parts in the position no shaft and the method of engagingi to the shaft、Properties processing and assembing etc.So the shaft has no standarded construction.Request of deigning the general shaft condtruction have these that the shaft and parts in it contain accurate work position,parts in shaft should be fixed oppoditly in the position, Properies well manufacturing and processing, the shape、sizeshould benefit to decrease“stress raisers”.
3.Improve transmission precision and rigidity enter the system of giving the baoo silk pole nut (enter give system sharply) , worm gear worm (circumference enter give system) and support structure to determine their transmission preeision and main part or rigidity, must guarantee machining accuracy of them at rirst, for adopt walk into electrical machinery drive turn on the ring system especially so. In enter for the drive chains to join and moderate the gear wheel, can reduce pulse equivalent, can improve the preeision of the trandmission from the point of what has been designed. In addition can also adopt dispelling the ball silk pole nut vice axial transmission interval clocely in advance rational; Support the bearing of the silk pole in order to improve the structure rigidity supported closely in advance; Dispel gear wheel, worm gear, etc.transmit interval among, measure these is it improve transmission precision to help. Rigidity is entered insufficiently for the system to make the workingbench (or tow the board) produce creeping and vibration. For adopt cylinder is it enter give system to drive ,because compression of rluid rigidity very much low, must limit the greatest journey of its cylinder.
Key words
Belting in step screw bulge set nut finish fit
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