Precision spherical hinge clearance-measuring instrument and measurement method

Abstract

The invention discloses a precision spherical hinge clearance-measuring instrument and a measurement method. The precision spherical hinge clearance-measuring instrument is characterized in that the precision spherical hinge clearance-measuring instrument is provided with a horizontal base platform, a rectangular outer frame, an inverted U-shaped inner frame, a loading cylinder, an adapter disk and an inductive displacement sensor. Under the cooperation of the motion of the rotatable rectangular outer frame and the rotatable inverted U-shaped inner frame which are perpendicularly crossed by each other, the precision spherical hinge clearance-measuring instrument can acquire the raw clearance error measurement data of the assembling clearance of a spherical hinge, and can obtain the model and rule of the spherical hinge clearance error by means of subsequent corresponding data processing; the clearance error of the spherical hinge within a three-dimensional space can be efficiently, automatically and accurately measured, and the invention can promote the progress of the parallel mechanism error modeling and correction technique.

Description

technical field [0001] The present invention relates to a measuring device and a measuring method, more specifically, it is used to measure the assembly gap formed after the assembly of precision ball hinges, universal hinges or Hooke hinges, and is used to know that the ball rods of the ball hinge are different in space. The regularity of the gap change during the pose. Background technique [0002] Because the parallel mechanism has the advantages of good stiffness, light motion inertia, and natural error averaging effect, it has been widely used in machine tools, robots, micro-motion workbenches, coordinate measuring machines and other fields in the past two decades. However, the motion error of the parallel mechanism has seriously restricted the application and promotion of the parallel mechanism in high-precision occasions. There are many factors that affect the error of the parallel mechanism, mainly including the structural parameter error of the parallel mechanism, ...

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Problems solved by technology

Therefore, if it does not pass the test and obtain comprehensive experimental data, it is difficult to establish its error model purely through theoretical calculations;

[0005] 3. Generally, multiple precision ball hinges are used in parallel mechanisms at the same time. Theory and practice have proved that there will be mutual coupling and error averaging effects among the gap errors of multiple precision ball hinges, so that the ball hinge gap error has a great influence on the final actuator. Movement accuracy effects are more complex

[0007] But so far there is no related special equipment that can be used to accurately measure the assembly gap formed after the assembly of precision ball hinges, universal hinges or Hooke hinges.

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