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Adjustment steps of reverse clearance and preload of CNC gantry milling machine
Source: gantry milling machine, gantry machining center, gantry optical machine, machine tool casting - Hebei Daheng Heavy Machinery Co., Ltd. release time: 2017 / 3 / 18 9:28:49 click times:

     

    numerical control Gantry milling machine In use, I often listen to users' feedback by phone that there is a gap in the machine tool. What is the matter? When the sliding seat of the gantry is reversed, the force direction of all transmission elements in the transmission system will change. Because the transmission elements are elastic, the elastic deformation direction of each transmission element will also change, which will produce reverse clearance. In order to reduce this reverse clearance, the whole transmission system must have a certain preload. numerical control Gantry milling machine The adjustment steps of reverse clearance and preload are as follows.

one Through the double gear clutch three And single tooth clutch four Make a rough adjustment. At this time, the sliding helical gear eight It is roughly in the middle of the gear travel. Double gear clutch three The number of teeth on two end faces is different, such as the number of teeth on one side z =29 , the number of teeth on the other side z,-30 Worm gear two And single tooth clutch four The number of teeth on the tooth surface is the same. Therefore, the shaft gear l The minimum adjustment angle of is ( 1/zl - 1/z2) 27r =( 1/29 -1/30 two Redundant( 2K eight hundred and seventy )= No o four hundred and fourteen When adjusting, loosen the fastening nut first five , disconnect the double gear clutch three And single tooth clutch four , rotating shaft gear l Or worm six To adjust the clearance (make the shaft gear l and fourteen As shown in the figure twenty-two Contact) and preload.

two Adjust the roller twenty And clearance plate twenty-one Contact pressure between. Use the adjusting nut sixteen and nineteen , change the fork eighteen On the pole fifteen The position of the roller is changed twenty And clearance plate twenty-one Contact pressure between. At the same time, it also changes the action on helical gears eight Thus indirectly changes the preload in the transmission system.

When the rod fifteen Or fork eighteen Move along the axis Imm The reverse clearance of the sliding seat of the gantry changes approximately o 02mm The allowable reverse clearance of the machine tool is zero point zero five 0.06mm It can be adjusted according to the above proportion.

The preload should be chosen properly. In principle, the preload is large and the reverse clearance is small, but the transmission efficiency is low, the friction loss is increased, and the service life is reduced; on the contrary, the increase of reverse clearance leads to high transmission efficiency and long service life. Therefore, under the premise of ensuring that the machine tool does not exceed the allowable reverse clearance, the preload should not be too large.

In general, the test method can be used to adjust, that is, pull the rod with a certain amount of force fifteen If you can make the roller twenty Just left the clearance plate twenty-one That is to say, the preloading requirements have been met.

numerical control Gantry milling machine In use, all the problems affecting the use and processing can not be ignored, we should find the right reasons, and then suit the remedy to the case, so that the machine tool can get efficient play, and can extend the service life! sh-mjt.com      www.dhjczg.com    http://hbdhjc.1688.com

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