| 摘要 |
<p>The invention relates to a device used for sharpening tools with helical surfaces, placed on the table of a sharpener with abrasive discs. According to the invention, the device consists of a main shaft () whereon the tool () to be sharpened is fixed, the main shaft () passes through a ball bearing () inside which there is fixed, by hooping, a profiled ring () which is in contact with the main shaft (), the ball bearing () being fastened in a box () which is integral with a shaft () of a worm gear (), on the shaft () there being mounted a spring disk () and a pressure bearing () fixed in the bore hole of an upper plate (), the worm gear () mounted with a wedge on the shaft () gears with a worm (), at the end of a worm shaft () there being placed a handle () for gearing the worm (), by actuating the handle (), the worm () gears with the worm gear () which by rotation inclines the box () together with the ball bearing () under an inclination angle () which coincides with the inclination angle of the screw of the tool () thus defining the helical walk of the tool (), the tool () being driven by actuating a hand wheel () in one sense or another, alternately, the tool () performing a rotary-translation movement under an abrasive disk () placed at the angle ().</p> |
