Only reasonable selection and correct use of the sand belt, and can correctly solve the various problems in the use of sand belt, play the advantages of sand belt grinding and the best grinding performance of the sand belt, in order to ensure the quality of the workpiece.how to use the sanding belt correctly?
1, reasonable choice of sanding belt type
Different processing workpiece material, different processing workpiece shape selected by the sand belt model is not the same, the choice of sand belt model is mainly from the matrix material, abrasive material, binder type and sand belt joint mode of four aspects to choose.
2, choose the appropriate granularity
Only by choosing the appropriate grit size can the surface quality of the workpiece be guaranteed and the service life of the grit belt be improved. If the selected sanding belt size is too small, it can not ensure the surface quality of the workpiece; If the grain size of the selected sand belt is too large, the sand belt is easy to wrinkle and break during use, which reduces the service life of the sand belt.
3, the selection of multiple sand belt grinding process
If a workpiece adopts multiple belt grinding processes, the grain size of the belt used in the back can only skip two particle sizes compared with the front, only in this way can the high efficiency of belt grinding be played to ensure the shape and size of the workpiece and the surface quality of the workpiece.
4. Distribution of grinding amount in multi-channel belt grinding process
Two processes: the distribution ratio of the front and back paths is 85/15;
Three processes: the distribution ratio of the front and back paths is 65/25/10;
Four processes: The distribution ratio of the front and back channels is 50/30/12/8
5, the choice of sand belt running direction
When using the lap sanding belt, the running direction of the sand belt should be consistent with the direction marked on the back of the sand belt, otherwise the sand belt is easy to break prematurely during use, and affect the surface quality of the machined workpiece.
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