Abstract
The kinematics characteristics of the traditional diamond frame saw were analyzed theoretically, and the prediction model of average chip thickness was established in this research. Sawing forces tests and sawing experiments were accomplished to investigate the sawing performance of the traditional horizontal frame saw and explore the instability mechanism of the sawblade in processing two varieties of granite. The results proved that most segments welded on sawblade surface kept synchronous and continuous contact with the stone block during sawing with traditional horizontal saw. The value of sawing force was positive correlation versus the feed velocity and sawing length, negative correlation versus the spindle speed, and also associated with the properties of stone materials. Only a few matrix trails were developed in the left and right ends of segment, and the matrix bond was dominated by severe abrasive. The diamond worn appearance varied greatly in different regions on segment surface, in which higher proportion of blunt and pull-out diamond particles were exhibited in the middle of segment, and the proportion of fractured particles increased in the left and right ends of segment. A long contact arc and continuous long and thin chips were maintained during the traditional frame sawing with the horizontal reciprocating linear motion of the sawblade, which led to larger sawing forces and instability of the sawblade, thus reducing the sawn slabs flatness.
Published Version
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