A ball screw is among the most commonly made use of software of mechanical transmission elements and precision machining, its most important function is always to change rotary motion into linear motion or force-torque to axial continuously, the two qualities of significant precision, significant efficiency and reversibility. Because of its little friction resistance, the ball screw repair is extensively utilized in different precision equipment and instrument industries!
There are actually quite a few forms of problems while in the ball screw, and there’s no fixed model. Some errors are gradual failures, there should be a growth course of action, along with the raising usage of extra and much more critical time; at times a sudden failure, typically doesn’t have distinct indications of sudden, this failure can be a range of unfavourable components along with the resulting exterior interactions. As a result, the proper exam to find out the cause of actual problems will be the premise of fast and exact servicing. For ball screw fix also need to be deemed.
1 Ball screw, nut and guidance clearing technique Detection and fix
When the CNC device software reverses error and superior positioning accuracy, quadrant mark is unstable, the first detail to detect the program screw you can find a distinction. Detection approach: indicator which has a ball within the centre end in the hole with the screw, axial measurement screw, a dial gauge piece measuring the get the job done desk. Screw rotation, observing the two blocks to the indicator dial displays, in line with alterations in several values ensure the location of the error.
2 FAG Detection and repair of clearing screw bearings
If the indicator dial measures the screw in the ball screw forward and reverses rotation the pointer swing doesn’t, that there’s no screw movement. In case the swing cursor indicator suggests the channelling screw phenomenon. The indicator dial actions the difference in between the maximum and bare minimum values that happen to be the axial distance from the screw. At this time, we’re going to test if the bearing back bearing assistance is locked, whether the bearing is worn out or not, whether the preload washer bearing is appropriate or not. In case the bearing is Alright, just re-load the pre-loaded gasket. If the bearing is damaged, the bearing ought to get replaced, re-loaded together with the pre-load washer, then supported yet again. The axial motion on the lead screw is dependent generally on the precision with the bearing preload. The most ideal situation of the precision of the installation of screw rods is always that there isn’t any beneficial and adverse clearance, as well as the help bearings ought to be about 0.02mm interference.
3 FAG Detection and upkeep of gaps between pairs of two ball screw nuts
By inspection, if an error is confirmed, it is actually not due to the motion from the direct screw. Need to look at whether or not the screw nut, the gap concerning the two, Detection of this circumstance fundamentally while using the detection from the direct screw moving precisely the same. Worktable related with dial and nut indicator, forward and reverse screw rotation, detect greatest clearance in between screw and nut then be modified.
4 FAG inspection and servicing of single pair nuts
For 1 ball screw nut, the hole between the screw pair and also the nut can not be altered. Should the direct screw nut is detected, there is a gap. Very first, check the lead screw and thread bow nut Are worn, like critical put on, need to exchange the complete list of guide screw nuts.
If compact wear is detected, a bigger diameter ball can be changed to fix it. First, the utmost clearance on the detected pair nut screws is transformed to an increase in ball diameter then outfitted together with the suitable ball to regroup. This sort of upkeep is elaborate and calls for quite a while and calls for a high degree of technology.
5 The beam flanges and tables are connected, you will discover gaps continue to there
This issue is usually simply ignored for a long time, reciprocating the engine, unfastened screw Fala disc hole, verify the gap while in the failure component for that screw to exclude, to stay away from repairs.
6 Ball screw nut motion is just not too much sound, easy routine maintenance along with other failures
Ball screw nut actions are not easy plus the sounds is simply too substantial, primarily on account of bad lubrication, but sometimes it could be for the reason that the servo motor travel parameters are certainly not adjusted appropriately caused.
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