The inspection of fixtures follows a systematic process: First, pre-inspection preparation is performed, including cleaning the fixture surface, verifying the inspection benchmark, and installing standard calibration parts.
The second step involves an initial condition inspection, confirming no obvious damage or looseness through visual inspection and simple tools.
The third step is the core inspection stage: For geometric accuracy, a coordinate measuring machine (CMM) is used to collect positioning feature point cloud data along a preset path, and the deviation is calculated by comparing it with the design model; clamping force testing involves repeatedly clamping a standard test block under rated pressure using a force sensor, recording the force value fluctuation range; repeatability accuracy requires repeatedly clamping and loosening the workpiece, and measuring the reset error using a dial indicator.
The fourth step involves dynamic testing, such as monitoring the fixture's resonant frequency using an accelerometer in a simulated machining vibration environment.
Finally, an inspection report is generated, recording any out-of-tolerance items and providing improvement suggestions. Key aspects include: controlling the temperature and humidity of the inspection environment, regular instrument calibration, and verifying the statistical validity of the data acquisition.
