How does the coordinate measuring machine fix the workpiece for measurement?

How does the coordinate measuring machine fix the workpiece for measurement? Post time: 2019-10-11 Source: http://www.microaccuracy.com/ Many products have high requirements for measurement accuracy. In addition to the high precision performance of the coordinate measuring machine, it also requires that the workpiece can be fixed Place for measurement, so as to reduce the measurement error, how does the CMM fix the workpiece for measurement? In the process of using the coordinate measuring machine, the workpiece needs to be stably placed on the worktable and cannot be affected by other external forces. Therefore, whether the workpiece is placed stably has a great influence on the final measurement result. The fixing methods for different workpieces are not the same. The following Miaoji will share with you the commonly used fixing methods: Classification according to the fixing method: Adhesive fixing: The parts can be directly glued and fixed on the table with a glue gun. This fixing method The advantage of this method is that the workpiece will not be deformed due to the clamping force, but it must be remembered that the feature directly in contact with the table is inaccessible. After the measurement, the glue should be removed with an appropriate solvent. The main disadvantage of this method is visual inspection. Method to adjust the direction of the workpiece. Fixture fixation: During the measurement process, the fixture can be used to install the workpiece to make the parts easy to locate. The clamping system will not deform the workpiece. It should be ensured that all measured features are accessible during use, so that the measurement time can be shortened. The fixed fixture is now widely used in the measurement process of the coordinate measuring machine. Classification according to the shape and weight of the workpiece: Light parts: For small light parts, plasticine, instrument wax and other materials can be used to fix the parts, but the user should ensure that all traces are removed from the machine and parts after the measurement. In some cases, it is necessary to use mechanical methods to fix the parts on the coordinate measuring machine. The user should know that the clamping force will cause the deformation of the parts, so care must be taken not to over-clamp it. It is recommended to use a soft cushion between the fixture and the part. Magnetic and vacuum chucks can also be used as another clamping method. Heavy parts: If the measured part is heavy enough that it can be stably placed on the machine table without any clamping device; the user should know that the part is in a free state during measurement, that is, no safety device is required, and the workpiece will not Displacement occurs, but the operator must know that heavy parts will inevitably cause machine deformation. The above are several fixing methods used by the coordinate measuring machine in different situations. The appropriate fixing method must be selected according to the measurement requirements and material characteristics, so as to reduce the measurement error and improve the accuracy of the measurement. At present, Miao Technology can provide more A high-precision and high-quality three-coordinate measuring machine, one-button measuring instrument and other professional equipment!