For mutual positions, that means absolutely parallel, perpendicular, coaxial, symmetrical, etc.;
1. Dimensional accuracy
The degree of conformity between the actual size of the intelligent part and the center of the tolerance zone of the part size.
2. Shape accuracy
It refers to the degree to which the actual geometric shape of the surface of the intelligently manufactured parts conforms to the ideal geometric shape.
3. Position accuracy
Refers to the actual position accuracy difference between the relevant surfaces of the parts after intelligent construction.
4. Mutual relations
Usually, when designing parts and specifying the machining accuracy of parts in the silica gel mold machine, it should be noted that the shape error should be controlled within the position tolerance, and the position tolerance should be less than the size tolerance. That is, the shape precision of precision parts or important surface of parts should be higher than the position precision, and the position precision should be higher than the size precision.
The deviation between the actual and ideal geometrical parameters of a part is called machining error. The machining error reflects the machining accuracy. The greater the error, the lower the machining accuracy, the smaller the error, the higher the machining accuracy.
A brief introduction to the processing accuracy of silica gel mould
Machining accuracy is mainly used to produce the degree of product, and machining accuracy and machining error are both terms to evaluate the geometrical parameters of machining surface. The machining accuracy is measured by tolerance grade. The smaller the grade value is, the higher the accuracy is. The machining error is expressed numerically, the greater the error. High processing accuracy, that is, small processing error, and vice versa.
Tolerance grade from IT01,IT0,IT1,IT2,IT3 to IT18 a total of 20, wherein IT01 represents the highest machining accuracy of the part, IT18 represents the machining accuracy of the part is the lowest, generally IT7, IT8 is the middle level of machining accuracy.
Precision of silica gel mold represents the correctness of the measurement results, precision of silica gel mold represents the repeatability and reproducibility of the measurement results, precision is the premise of precision of silica gel mold.
This method has low production efficiency and is mainly used for small batch production and small batch production
(2) Adjustment method
The rotary accuracy of bearings should be improved:
First, choose high-precision rolling bearings
Three, the use of high-precision hydrostatic bearings,
The accuracy of bearing accessories should be improved:
First, improve the processing accuracy of box support hole and spindle journal;
Three, measure and adjust the radial runout range of the corresponding parts, so that the error compensation or offset.
(2) Proper pretightening of rolling bearings
One, can eliminate the gap;
Third, the rolling body error is homogenized.
3, reduce the transmission chain transmission error
(1) Less transmission parts, short transmission chain, high transmission accuracy;
(3) The precision of end parts should be higher than that of other transmission parts.
4, reduce tool wear
The tool must be replaced before the tool size wear reaches the stage of sharp wear.
