Ways to improve the machining accuracy of CNC lathes
1.1 In terms of parts, there are also machine adjustments to improve the accuracy of CNC lathe machining .
First, we will study how to improve the precision of CNC lathe machining from the aspect of mechanical adjustment. In the adjustment of the machine tool, these parts are mainly included, the spindle, the bed and the strips, etc., so that the lathe can meet the requirements, improve the precision of the CNC lathe processing, and also monitor in real time during the work process, and continuously optimize Insufficient in lathes in order to adjust the production of better products in a timely manner. This is the easiest and most convenient way to improve the machining accuracy of CNC lathes. This type of adjustment does not require good technology, but requires an inspection by the staff from time to time to make adjustments.
The second is the improvement in the electromechanical joint adjustment. To improve the machining accuracy of the parts, the improvement is mainly in the aspects of reverse deviation, positioning accuracy and repeat positioning accuracy. In terms of reverse deviation, we must first correct it by mechanical manual method when the deviation is too large, and then further optimize it in a professional way after the error is within a certain range. In the adjustment of the positioning accuracy, the error is continuously optimized by the degree of the microscope. The electromechanical coupling method optimized in these aspects is the most efficient of these adjustment methods. Although it will be cumbersome, the effect is better.
Third, this is through electrical adjustments. The adjustments in this aspect mainly include two aspects. One is the adjustment of the machine parameters. In this perspective, there are two aspects that affect the machining accuracy, the system gain and Positioning the dead zone, in terms of system gain, we should pay attention to the mechanical damping of the lathe and the inertia of the rotation, which affect the precision of the machining of the lathe. There is also the need to minimize the dead zone of the positioning, which can also improve the accuracy of the lathe operation. These two aspects are mutually reinforcing and must be adjusted at the same time. Another aspect is that it can be adjusted through the application of some systems. Since the degree of automation is constantly improving, the CNC lathe is automatically controlled for remote control during operation, so we need to enter a series of real-time monitoring during remote control. The program, so that no manual intervention is required, which can be more effectively supervised, and the program can be used to supervise the setting control and then improve the precision of lathe processing.
1.2 Adjusting the feeding mechanism to improve the machining accuracy of CNC lathes
First, the machining accuracy of CNC lathes caused by the lead screw lead error is affected. The main factor in this aspect is the pulse. Therefore, in the process of manufacturing the ball screw, the error should be minimized to cause the pulse pair. The impact of CNC lathe machining accuracy.
Second, the influence of the feed mechanism clearance on the machining accuracy of the CNC lathe is mainly due to the problems in the components of the transmission machinery, thereby reducing the accuracy of the uncontrolled lathe machining. The main components are the gears, the couplings, the ball screws and the support shaft. Problems between these components can affect the accuracy of CNC machine tools, so we need to strengthen the connectivity between their structures. The precision between them will affect the precision of lathe machining, thus reducing the gap between the various structures, and strengthening the tightness between the various structures will improve the machining accuracy of the CNC lathe.
1.3 The impact of errors in programming
The difference between the CNC lathe and the ordinary lathe is that the precision of the parts is different, but the error that occurs during the preparation process can be minimized, which requires us to reduce the error from several aspects, thereby improving the processing of CNC lathes. Precision. The first is due to the impact of interpolation errors on the accuracy of the lathe. So try to use a certain way to reduce the problem of programming, use absolute mode programming, and the error can be eliminated by inserting the reference point quality to program in the program. Second, the effect of the approximation error on the final accuracy. This is because there is an approximation in the process. Therefore, it is necessary to master the profile equation as much as possible to reduce the error to a large extent, so that the influence on the precision of the CNC lathe processing can be eliminated. Thirdly, due to the influence of the rounding error in the programming process, the machining accuracy of the CNC lathe is reduced. Therefore, we must select the minimum value of the linear displacement determined by the pulse equivalent for reference during machining. Therefore, when programming, we must strictly follow the specifications on the drawings as the benchmark.