In the process of processing and assembly, in addition to the operator's own skill, experience and other subjective factors, the detection method itself will cause a variety of errors on the car body.
There are two typical cases:
1. the body and the various components of car are mostly sheet metal parts, the workpiece is generally poor rigidity, and the various holes and the relative size of the body surface in a deformed stated by the impact of the Earth's gravity, the use of traditional measurements Methods are often unable to measure and evaluate this natural deformation, even if measure and evaluate, there will be a large deviation.
2. the car body assembly is a multi-type processing parts assembly system, it is difficult to avoid deviation in the detection of a single piece.
In view of the above reasons, the requirements of the car body detection are:
hole detection contains two elements: pore size, hole location;
shape inspection: the specific situation to take a variety of ways;
check the outline of the workpiece in a crossed way, the situation is similar with the inspection hole;
parts need to be clamped.
Traditional inspection is generally only for one parameter test, mostly for manual operation, and the work efficiency is not high. In addition, the traditional gage and checking fixture have many deficiencies, do not have the ability to monitor the operation of the production line. So Kingco introduced high-precision coordinate measuring equipments, including Italy imported Hexagon automatic coordinate measuring instrument and joint venture brand automatic three Coordinate measuring instrument, to carry out the detection of vehicle inspection.
Coordinate measuring machines are universally equipped with high precision, high speed, good flexibility, strong data processing and ability to adapt to the on-site environment, especially the rich and expanding software features that make CMM play more and more the role in the body quality control. Especially in today's car production workshop, the CMM has been used in the production line, rather than in the measurement room away from the scene. In the stamping parts production workshop, the use of coordinate measuring machine detection has been more than half and some large complex parts with the higher proportion of the test. Not every welding piece needs to be tested, but in those who have to be controlled body assembly, the ratio of using coordinate measuring machine to check even to two thirds. The coordinate measuring system used in the production process has become an integral part of the process in fact.