ICE SCRAPER HAVING NON-ROTARY TOOLS WITH SHIELDED CUTTING INSERTS

摘要

A vehicle-mounted ice-scrapingmecha-nism includes a tool carrier mounted on thevehi-cle, and a plurality of non-rotatable ice-scrapingtools mounted on the tool carrier anddepend-ing downwardly therefrom. Each tool includes ashank (18) mounted to the tool carrier, and acut-ting head (16) depending downwardly from theshank. The cutting head (16) is formed of a steelmain body, and a carbide insert (30) is mountedin the steel body at a location spaced from a frontend of the steel body. During a wear-in period,front and bottom surfaces (24, 26) of the steelbody define a rake face and a clearance face,re-spectively, of the tool. After the wear-in period,front and bottom surfaces of the insert define therake face and clearance face, respectively. Thetool is oriented such that the shank and the rakeface extend upwardly and forwardly to define apositive rake angle a. The tool shanks arecylin-drical and are mounted in cylindrical bores (20)in the tool carrier. The cutting heads are situatedso closely together that they abut one another andthereby prevent rotation of the tools relative tothe tool carrier.