Knowledge of precision testing of machine tool parts

Knowledge of precision testing of machine tool parts shared by CNC Lathe Machine Manufacturer China.

1, for the guide rails with different shapes, which planar straightness errors should be controlled separately for each appearance?

Answer: the common shape of machine guide is rectangular guide and v-shaped guide. The horizontal appearance of the rectangular guide guides the straightness error of the guide in the straight plane. The two surrounding surfaces of the rectangular guide guide control the straightness error of the guide in the horizontal plane. For the v-shaped guide, because the guide is composed of two oblique appearance, so the two oblique appearance is not only control the straightness error in the straight plane, but also control the straightness error in the horizontal plane together.

2, guide straightness error commonly used to see what are the methods?

Answer: guide straightness error commonly used view method: grind point method, flat ruler pull table contrast method, pad plug method, pull steel wire check view and level check view, optical leveling instrument (self-collimator) check view.

3, what is called point method?

Answer: when viewing the straightness error of guide rail with flat ruler, evenly apply a layer of very thin red lead oil on the appearance of the guide rail being inspected, cover the flat ruler on the appearance of the guide rail being inspected, use the appropriate pressure to make the reciprocating movement of short interval to grind the point, and then take off the flat ruler to investigate the distribution of grinding point on the appearance of the guide rail being inspected and the density of the thinnest point. The points are evenly distributed over the whole length of the guide rail, which indicates that the straightness error of the guide rail has reached the corresponding precision requirement of the flat ruler. This method is called the spot method.

The flat ruler used in the point grinding method is a standard flat ruler, and its precision level is selected according to the precision requirements of the guide under inspection, usually not less than 6 levels. Length is not less than the length of the guide under test (under the condition of low precision requirements, the length of the ruler is 1/4 shorter than the guide).

That's all for the sharing,and we supply CNC Pipe Threading Lathe Machine for sale, if you have any demand for our products,just feel free to contact us.