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How to detect and repair screw rods in Sutong Machinery

The faults caused by ball screws are diverse and have no fixed pattern. Some faults are gradual and require a development process, which becomes increasingly severe with the increase of usage time; Sometimes it is a sudden malfunction, usually without obvious signs, but it occurs suddenly. This type of malfunction is caused by various unfavorable factors and the combined action of the outside world. So determining the true cause of the malfunction through correct detection is a prerequisite for fast and accurate maintenance.

Inspection and repair of clearance between ball screw nut pair and support system

When CNC machine tools have large reverse errors, unstable positioning accuracy, and tool marks when crossing quadrants, the first step is to check if there is any gap in the screw system. The detection methods include: using a dial gauge with a steel ball placed in the center hole at one end of the screw, measuring the axial movement of the screw, and using another dial gauge to measure the movement of the workbench. Rotate the lead screw forward and backward, observe the values reflected on the two dial indicators, and confirm the fault location based on the different changes in the values.

How to detect and repair screw rods in Sutong Machinery

The faults caused by ball screws are diverse and have no fixed pattern. Some faults are gradual and require a development process, which becomes increasingly severe with the increase of usage time; Sometimes it is a sudden malfunction, usually without obvious signs, but it occurs suddenly. This type of malfunction is caused by various unfavorable factors and the combined action of the outside world. So determining the true cause of the malfunction through correct detection is a prerequisite for fast and accurate maintenance.

Gap caused by loose connection between nut flange and workbench

This problem is generally easily overlooked, as the machine tool moves back and forth for a long time, causing gaps in the screws that fix the Faraday disc. When checking the clearance between the screw and nut, it is important to first eliminate this fault factor to avoid taking a detour during repair.

Sutong Machinery: Multi head lead screw

Multi head screw threads are classified not only by cross-sectional shape, but also by the number of spiral grooves on the threads. A thread with a spiral groove is called a single head thread. A thread with two or more spiral grooves is called a multi head thread. The distance between adjacent spiral grooves on a thread is called the pitch. The distance traveled by rotating along the spiral groove for one revolution is called the lead.

The relationship between lead and pitch can be represented by the following equation;

L=t x n

In the formula, L - thread lead (mm),

N - Number of thread heads,

T - Thread pitch (mm).