Method for fixing workpieces of three-coordinate measuring machine on image measuring instrument

The method for fixing the workpiece on the coordinate measuring machine of the image measuring machine. Since the coordinate measuring machine is a high-precision measuring instrument, the measurement accuracy is very high, and any factor may affect its measurement results. Therefore, when the coordinate measuring machine measures the workpiece, whether the workpiece is stably placed has a great influence on the measurement result. We know that when measuring the workpiece, the coordinate measuring machine needs to stably place the workpiece on the worktable, and any external force will not affect the performance of the workpiece and the measuring machine to ensure the reliability of the workpiece. The measurement and the result is very high, which requires fixing the workpiece. The following is a classification of different methods and different workpiece fixing methods. The following small series of articles will explain to you for your reference: 1. Classification according to the fixing method: Bonding: You can also use a glue gun equipped with a suitable glue stick to directly fix the workpiece on the surface of the worktable. The advantage of this method is that the parts will not be deformed by the clamping force. The user should ensure that all test functions are accessible. However, it must be remembered that the characteristics of direct contact with the desktop are inaccessible. After the measurement, apply a suitable solvent to remove the glue. The main disadvantage of this method is to adjust the direction of the workpiece through visual inspection. Musical instrument wax is another kind of fixing device besides glue. Heat and soften by hand. It fixes the parts and the edge of the workbench like glue. Since the instrument wax will deform within one hour after application, which will cause the position of the part to change, the measurement can only be performed after the deformation cycle has passed. Repair: The workpiece clamping system constructs a simple task-oriented fixture for the user who installs the workpiece to facilitate the positioning of the parts. The clamping system will not deform the workpiece. It should be ensured that all measured features can be accessed during use, so that measurement time can be shortened, and fixtures are now widely used. 2. According to the shape and weight of the workpiece: Lightweight parts: For small and lightweight parts, you can use plasticine, instrument wax and other fixed parts, but the user should ensure that all marks will be removed from the machine and parts after the measurement is completed. In some cases, it is necessary to mechanically fix the parts on the coordinate measuring machine. The user should be aware that the clamping force will cause deformation of the part. Therefore, care must be taken not to over-clamp. It is recommended to place the cushion between the fixture and the part. Electromagnetic and vacuum chucks can also be used as another clamping method. Heavy parts: If the part to be tested is heavy enough, it can be placed on the machine table without any clamping device; the user should know that the part is free when measuring, that is, there is no safety device, image measuring instrument workpiece There will be no displacement, but the operator must know that heavy parts will inevitably cause the machine to deform.