With our processing, is more and more extensive, many products, are to be used for processing, for processing problems, how to solve, how to deal with, CNC machining is the same, then CNC machining parts spherical surface easy to produce shape error elimination method is what?
- Caused by system gap
In the transmission pair of CNC machining equipment, there is a certain gap between the lead screw and the nut. With the increase of the equipment operation time, the gap is gradually increased due to wear. Therefore, the corresponding gap compensation during the reverse movement is the main factor to overcome the shoulder on the machined surface. The gap measurement usually adopts the dial indicator method, and the error is controlled within 0.01-0.02 mm. It should be pointed out here that the meter base and the meter rod should not be extended too long, because the cantilever is long, the meter base is easy to be forced to move, resulting in inaccurate counting, and the compensation value is not true.
- Caused by uneven machining allowance of workpiece
Before the design surface of CNC machining parts is realized, whether the machining allowance of the surface to be machined is uniform is also an important reason for whether the forming surface can meet the design requirements, because the uneven machining allowance is easy to cause “remapping” error. Therefore, for the parts with high requirements on surface shape, the machining allowance should be even as much as possible before forming, or the method of machining one more profile to meet the design requirements.
- Improper tool selection
CNC cutting tools remove materials through the main cutting edge. However, after the arc passes through the quadrant, after the arc is tangent to the cutting edge of the tool pair (the intersection line between the back of the pair and the base plane), the secondary cutting edge may participate in the cutting (i.e. backhoe). Therefore, the wedge angle of the tool must be considered when selecting or grinding the tool.
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