measurement for wheel hub bearing

When the roughness meter measures the surface roughness of the workpiece, the sensor is placed on the measured surface of the workpiece, and the driving mechanism inside the instrument drives the sensor to slide along the measured surface at a constant speed. The sensor feels the roughness of the measured surface through the built-in sharp stylus. At this time, the roughness of the measured surface of the workpiece causes the displacement of the stylus, and the displacement changes the inductance of the sensor inductance coil, thereby generating an analog signal proportional to the measured surface roughness at the output of the phase-sensitive rectifier. The signal enters the data acquisition system after amplification and level conversion.

The Semi-automatic CMM can be defined as "a detector that can move in three directions and can move on three mutually perpendicular guide rails. The detector transmits signals in contact or non-contact, and the displacement measurement of the three axes The system (such as grating ruler) calculates each point (x, y, z) of the workpiece and the instrument for measuring various functions through a data processor or computer. The measurement function of the three-coordinate measuring instrument should include dimensional accuracy, positioning accuracy, geometric accuracy and contour accuracy, etc.

The roundness meter is a measuring tool that uses the rotary axis method to measure the roundness error of the workpiece. The rotation accuracy of the precision shaft system of the roundness meter can reach 0.025 microns. Using the error separation method, the electronic computer is used to automatically compensate the systematic error of the precision shaft system, and the multiple measurement method is used to reduce the accidental error, which can increase the measurement accuracy to 0.005 Microns.

The CMM is one of the most important measuring equipment in the measuring room. The CMM refers to the three-coordinate measuring machine, which refers to the instrument that can express the geometric shape, length and circumferential indexing within the spatial range of a hexahedron. A CMM can be defined as "a detector that can move in three directions and can move on three mutually perpendicular guide rails. The detector transmits signals in contact or non-contact. The displacement of the three axes The measurement system (such as an optical ruler) calculates the coordinates (X, Y, Z) of each point of the workpiece through a data processor or a computer, and an instrument for measuring various functions." The measurement function of the CMM should include dimensional accuracy, positioning accuracy, geometric accuracy and contour accuracy, etc.

The first-piece inspection will be carried out every time the shift is changed, the tool is changed, and the line is changed. The contourgraph is the most important measuring equipment for the first-piece inspection of turning processing.Obtain the surface profile parameters by sliding the stylus on the surface of the object to be measured, compare the drawings to confirm that the requirements are met, and release, and start mass production.