Device and method for quickly measuring ball screw nut raceway error

Abstract

The invention discloses a device and method for quickly measuring the raceway error of a ball screw and a ball nut. The second probe, the lower moving platform, the horizontal moving platform, the second translation platform, the second support block, and the ball nut to be tested; the horizontal moving platform, the first translation platform, and the second translation platform are all set on the workbench. There is a pair of linear slide rails between the workbench; the first translation platform and the second translation platform are respectively arranged on both sides of the horizontal movement platform, and the first translation platform and the second translation platform are respectively fixed with the first support block and The second support block; the upper mobile platform and the lower mobile platform arranged in parallel are arranged on the horizontal mobile platform; the first probe and the second probe are respectively fixed on the upper mobile platform and the lower mobile platform; There is a grating scale; the invention can detect the curved surface of the ball screw and the ball nut raceway.

Description

technical field [0001] The invention belongs to the field of ball screw and ball nut detection, in particular to a device and method for quickly measuring the raceway error of a ball screw nut. Background technique [0002] As the important components of the ball screw pair, the ball screw and the ball nut have an important influence on the screw pair, and the parameter error of the ball screw and the ball nut spiral raceway surface directly affects the friction and wear of the screw pair, accuracy maintenance, Life, rigidity and vibration noise. Starting from improving the product performance of the domestic ball screw pair, it is necessary to test the parameters of the ball screw and the ball nut spiral raceway surface. [0003] At present, due to their unique structures, the ball screw and ball nut generally use the indirect method or contact sensor to measure the raceway profile. A suitable grinding wheel, use the grinding wheel to test the sample, cut the obtained sam...

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Problems solved by technology

[0003] At present, due to their unique structures, the ball screw and ball nut generally use the indirect method or contact sensor to measure the raceway profile. A suitable grinding wheel, use the grinding wheel to test the sample, cut the obtained sample along the axis, and then project it on a large screen to observe the profile of the raceway section, if it meets the requirements, use the grinding wheel as the standard for this type of raceway Processing tools, this method needs to cut the nut to cause damage to the test piece, and the human factor is large, and the repeatability of the measurement result is poor; the existing contact measurement is to use a profiler to measure, the probe penetrates into the nut and crawls along the raceway, and the profile The instrument can obtain the raceway profile of the amplified signal. This method has high precision, but the measurement is axial data. However, during the actual movement of the ball screw pair, the normal plane parameters affect the movement, and the ball screw cannot be directly measured. The middle diameter of the rod and the ball nut needs to use a standard measuring rod. The error is large and the efficiency is low.

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