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Precision parts processing, — Improve the machining accuracy of nc lathe of skills ( 2)
a few days ago we share with you the part precision parts processing on how to improve the machining accuracy of nc lathe skills, today, we continue to introduce for everybody in the feed mechanism and the matters needing attention in programming:
a, adjustments in feed mechanism to improve the machining precision of the numerical control lathe
the first, in terms of the ball screw lead error caused by the numerical control lathe machining accuracy is affected, the major factors that influence in this respect is pulse, so in the manufacturing process of ball screw, try to reduce the error of the pulse effect on the machining accuracy of nc lathe.
second, gaps in a feed mechanism for CNC lathe machining precision and the effect of this is due to the mechanical transmission part of the problems caused by the impact, which reduces the control precision of lathe processing. Section is a key component of gears, shafts, ball screw, and is composed of supporting shaft. Problems between these components will affect the numerical control machine processing precision, so we should improve the connectivity between their structure. Between them will affect the precision of lathe machining precision, thus reducing the gaps between the various structure, strengthen the tightness between the various structure will improve CNC lathe machining accuracy.
2, the influence of the error in the programming of
the difference between numerical control lathe with ordinary lathe is the precision of parts is different, but because of the errors that occur during the process of compiling can be minimized, this requests us to reduce the error from several aspects, so as to improve the accuracy of the numerical control lathe processing.
the first, is due to the impact of interpolation error on precision lathe. So try to adopt a certain way to reduce programming problems, using absolute programming, and can eliminate the error is to use insert will quality reference point for programming in the program;
second, the influence of approximation error for the final accuracy. Because in the process of using approximate conditions so that error will occur. So try to grasp the profile equation to programming can largely reduce the error, so that it can eliminate the influence on the precision of the numerical control lathe processing;
third, due to the influence of roundness error in the programming process reduces the machining precision of numerical control lathe, so we should choose when processing the pulse equivalent to the linear displacement of the minimum value for reference. So at the time of programming to work in strict accordance with the drawings of the above specifications as a benchmark.
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