Simple flexible positioning method for continuous external surface of workpiece

Abstract

The invention provides a simple flexible positioning method for a continuous external surface of a workpiece, which comprises the following steps: external surface elements-positioning points or lines are selected on the continuous positioning external surface of the workpiece, and the shape of the workpiece is determined and positioned discontinuously by the multiple points or multiple lines; positioning pins which are in point contact or line contact with the external surface of the workpiece are installed on the selected positioning points or lines, and shape positioning pins (7) are distributed along the shape of the workpiece; the positioning pins are positioned by tangent points or tangent lines which are in contact with the shape of the workpiece; the shape positioning pins (7) areinstalled in a step bushing (6); the shape positioning pins (7) are assembled at one end of the step bushing (6), and a target ball (8) of a laser tracking instrument is arranged at the other end of the step bushing (6); laser beams are received by the target ball (8); and the laser tracking instrument emits and receives the laser beams fedback by the target ball (8) and judges the space positionof the positioning points by a computer. The method for flexibly positioning the shape of the workpiece provided by the invention has high manufacturing accuracy, small technology difficulty, high work efficiency and short manufacturing cycle.

Description

technical field [0001] The invention relates to a simple and flexible positioning method for the continuous outer surface of a workpiece. Background technique [0002] The shape locator is a key and typical part that is essential to ensure the shape of the workpiece in the assembly tooling. The main form of the shape locator in the prior art is a pallet. There are analog quantity processing and manufacturing methods (including mold line model method and standard molding method) and numerical control processing method for the outer surface of the pallet. [0003] In the process of dimension transmission, the mold line model method is to accurately draw the mold line of the parts and assemblies according to the size of 1:1, as the original basis for the shape of the parts. The model with the real shape of the workpiece is processed by the mold line. Use the template as a measuring tool for processing or inspecting various process equipment and measuring the shape of the wor...

AI Technical Summary

Problems solved by technology

The disadvantages of the mold line template method are: low manufacturing accuracy

The disadvantage of the standard manufacturing method is that the manufacturing accuracy is low

The disadvantage of CNC machining method is that technical requirements are difficult to realize

For these positioners, the existing methods have low manufacturing accuracy, long cycle time, high cost, and are not suitable for workpiece changes.

For workpieces with small structural size and many parts, too many locators and locating surfaces seriously affect the openness and bring inconvenience to workers

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