Centerless grinders common problems and troubleshooting methods

Taper The product has adjustable taper or a deciduous plate on the guide wheel surface of the machine tool with a waterproof paper pad; check whether the guide wheel shaft of the machine tool is too loose. The standard is below,
Poor smoothness of machine-milled products may be caused by the following problems: the center height of the product is too low (higher pads or cylindrical pins, the standard is below); the grinding area of ​​the product is too short; the grinding wheel vibration is too large ( Use a balance frame to adjust the static balance) The quality of the machine tool guide wheel is too poor (the surface of a good guide wheel is smooth after trimming, the texture is uniform without pores,); whether the cutting fluid of the machine tool has oil slick or has deteriorated;
Roundness: The roundness of the product is not good, and the center height of the product is too low; see if the grinding sound and sparks of the machine tool are normal; whether there is abnormal vibration during the grinding of the machine tool.
Machine shaft accuracy standards
ZM series cases
因 The axis of the grinding wheel is 0.02 mm in the longitudinal direction and 2 mm in the axial direction. It is strongly pushed back by hand, and the turning accuracy is within 0.003 mm. The guide wheel shaft has a meridional length of 0.05 mm, an axial length of less than 0.08 mm, and a turning accuracy of less than 0.003 mm.
MG system example: The longitudinal axis of the grinding wheel is 0.01 millimeters and the axial direction is 2 millimeters. It is strongly pushed back by hand, and the rotation accuracy is within 0.003 millimeters. Except for the static pressure floating shaft (MGT1050). The guide wheel shaft has a meridian of 0.0005 mm. The thrust force is pushed back by the axial force. The turning accuracy is within 0.003 mm.
Standard for center height of machined workpiece
Upset grinding products are generally centered on the center of the machine tool wheel axis
The center height of the precision grinding product is the center height of the machine tool shaft plus the center height of the product from 1/2 to 2/3.
Thin products are easily deformed, so the height should only be a little higher (based on the product not jumping when grinding)

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