Общий каталог Ingersoll 2011 - страница 687

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PRODUCTIVITY TIPS STATIONARY DRILLING When setting up an indexable drill, it is always a good idea to locate the drill in the turret in an attitude that puts the inserts parallel to the machine ways. When using drills on the lathe, the drills must be properly aligned prior to Most lathes have more than one set of screws in the turret that allows this. taking the first cut. Plus, periodic alignment checks must be made to insure the continued accuracy of the setup. DRILLING CONDITIONS Common drilling applications with flat or convex such as porosity, sandy castings, etc., also have Most Common Conditions surfaces generally require no speed or feed some effect on tool life. Operating parameters adjustment during the drilling cycle. may have to be adjusted accordingly. Special situations however, may necessitate Feedrates on 4:1 drills may need to be reduced temporary adjustments. In the examples below, even more than the recommendations below reductions to feed and/or speed may be required indicate. Generally, this reduced feedrate is to minimize deflection or tool wear. required until the first .200” DOC after full engagement is reached. Material surface conditions such as case hardening or scale may require slowing penetration to some degree. Interior conditions Flat Convex Less Common Conditions Sloped: If slope exceeds 5°, reduce feed Concave: Reduce feed by 60% Irregular: Reduce speed Interrupted: Reduce feed when by 50% during penetration. during penetration. during penetration. crossing and before penetration. 689