| 摘要 |
For band saw machines, a replaceable surface band wheel is disclosed wherein a helical groove is machined in the peripheral surface of a substantially conventional disk-shaped band wheel of the flanged type to extend from the rear face flange to the non-flanged front face of the band wheel. A wire is wound about the peripheral surface such that the wraps of wire lie in the helical groove and extend radially above the peripheral surface. The wire, so placed, forms an inexpensive replaceable cutting band contact surface. The depth and pitch of the helical groove and the wire size are selected to insure that the wire extends partially above the peripheral surface and to provide space between adjacent wraps of wire so that during cutting operations cutting chips and scale which might otherwise loosen the wire or cause abrasive wear to the band wheel peripheral surface are forced temporarily into the spaces between the wraps of wire. The inexpensive wire is secured on the peripheral surface at its first end by an anchor arrangement and is loosely secured at its second end by a flange. Because of the loosely held second end and the helical groove, the wire tightens itself around the band wheel under the action of the tensioned cutting band riding on the cutting band contact surface. Only the wire surface experiences wear resulting from cutting band contact, abrasive chip action, and slippage between the cutting band and the band wheel. Following excessive wear, the inexpensive wire is readily replaced to completely restore the cutting band contact surface thereby eliminating heretofore required precise machine and assembly techniques. A removable flange arrangement simplifies wire replacement and allows renewal of the flange.
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