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How to improve the machining accuracy of lathe?

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Update time : 2019-10-31 10:29:19
First, the parts and machine adjustment

Firstly, 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 regularly monitor 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.

Improvements in electromechanical linkages. To improve the machining accuracy of parts, it is mainly to improve the reverse deviation and 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.

By making adjustments in electrical terms. The adjustment in this aspect mainly includes two aspects. One is the adjustment of the machine tool parameters. In this angle, there are two aspects that affect the machining accuracy, namely the system gain and the positioning dead zone. In terms of system gain, we should pay attention to the lathe. The aspect of mechanical damping is also the inertia of the rotation, which affects 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, CNC lathes use automatic remote control during operation, so we need to enter a series of monitoring programs during remote control. This eliminates the need for manual intervention, which allows for more effective supervision, and can be used to monitor the set control and then improve the accuracy of lathe processing.

Second, the feeding mechanism

The machining precision of CNC lathe 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 and the pulse should be processed on the CNC lathe. The impact of accuracy.

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 precision 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 CNC lathes.

Third, the impact of errors in programming

The difference between a CNC lathe and a conventional lathe is that the accuracy of the part is different, but the error that occurs during the preparation of the program can be minimized, which requires us to reduce the error in several ways.

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, using absolute mode programming, and the ability to eliminate the error is to insert the reference point quality to program in the program.

The effect of the approximation error on the final accuracy. This is due to the fact that 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.

During the programming process, due to the influence of the rounding error, 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.