How to reduce the workpiece surface roughness

Workpiece surface roughness is one of the common problems of CNC machining center, which directly reflects the processing quality. How to do control parts processing surface roughness, CNC CNC lathe manufacturer to in-depth analysis of the cause of the rough surface, mainly includes: cause in the process of milling tool; Heat deformation resulted from the cutting separation or plastic deformation; The friction between the tool and machining surface.

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workpiece surface roughness when choose, should should not only meet the requirements of parts surface function, and to consider economic rationality. On the premise of meet cutting function, should as far as possible choose bigger the surface roughness of the reference, in order to reduce the production cost. Tool as the executor of the machining center must pay attention to the daily maintenance of grinding in time, avoid the tool surface roughness not qualified too blunt. In the numerical control machining center processing parts, we how to choose the locating datum? As by CNC numerical control lathe factory under the simple introduce:

1, the selected benchmark should be able to guarantee the accuracy of the workpiece positioning, it is convenient for loading and unloading workpieces can quickly complete positioning and clamping of the workpiece, reliable clamping, and fixture structure is simple.

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2, CNC machining center selected datum and the machining parts of various size of simple operation, to reduce the dimension chain calculating as far as possible, avoid or reduce the calculation process and calculation error.

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3, ensure the machining accuracy. When determining of specific parts of positioning, should follow the following principles:

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1) Workpiece coordinate system origin that is 'zero' programming and parts positioning base must not overlap, but should have certain geometric relationships between. Are considered in the selection of the workpiece coordinate system origin to facilitate programming and measurement. For all the parts of a higher dimensional accuracy requirements, determining the locating datum, the CNC machining center should be considered the origin can be obtained by locating datum accurate measurement.

( 2) When on the CNC machining center processing benchmark and complete each stage of processing, the choice of the locating datum should be considered to complete the processing content as much as possible. To this end, want to consider to each surface are processing way of positioning, such as for housing, a two pin positioning method, so that the cutting tool on the surface of other processing.

( 3) Try to choose the design basis for the locating datum for the parts on. This request when rough machining, considering how rough benchmark to fine benchmark the surface processing, CNC machining center on the use of various positioning base should be completed in front of ordinary machine tools or other processing, so easy to guarantee each workstation processing on the surface of the precision of the relationship between each other.

( 4) When parts CNC machining center locating datum and the design basis to overlap, should be careful analysis assembly drawings, determine the design of the component design benchmark functions, through the calculation of dimension chain, strict rules between locating datum and the design basis of tolerance range, to ensure the machining accuracy.

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