The THK Ball Screw has various faults, and there is no fixed pattern. Some failures are gradual, and there must be a development process, which becomes more and more serious as the use time increases. Sometimes it is a sudden failure, usually without obvious signs, but suddenly occurs, this kind of failure is caused by various unfavorable factors and the outside world. Therefore, determining the true cause of the failure through correct detection is the prerequisite for fast and accurate maintenance. Next, let's take a look at the inspection and repair of the THK Ball Screw. Here are some answers.
Here is the content list:
l The inspection and maintenance of the gap produced by the THK Ball Screw double nut pair.
l Inspection and maintenance of THK Ball Screw single nut pair.
Through testing, if it is confirmed that the fault is not caused by the movement of the THK Ball Screw. It is necessary to consider whether there is a gap between the screw and nut pairs. In this case, the detection method is the same as the detection of screw movement. Use a dial indicator to measure on the workbench connected to the nut, turn the screw in the forward and reverse directions, detect the maximum gap between the screw and the nut, and then adjust.
The method is to adjust the thickness of the washer 4 to make the left and right nuts 1 and 2 produce axial displacement, thereby eliminating the clearance of the THK Ball Screw nut pair and generating pre-tightening force. Because the structure of the screw nut pair is different, the adjustment method is also different, so I won't list them one by one here.
For the single nut THK Ball Screw, the gap between the screw nut pair cannot be adjusted. If it is detected that there is a gap in the screw nut pair. First, check whether the thread arc of the screw and nut has been worn out. If the wear is serious, a complete set of screw nuts must be replaced.
If the check is slightly worn, you can replace it with a larger diameter ball to repair it. First, detect the maximum clearance of the THK Ball Screw nut pair, convert it into an increase in the ball diameter, and then select the appropriate ball to reassemble. Such maintenance is more complicated, takes a long time, and requires a high level of technology.
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