Wheel trimmer
AssigneeLear Siegler, Inc.
InventorEdward Z. Krygier
Life of this patent
Estimating the term…
Abstract
A trimmer for a grinding wheel comprising two templates operable sequentially to effect movement of a diamond trimming point to produce a cross-sectional curve on the grinding wheel in the form of a modified involute or the like.
Claims12
A trimmer for a grinding wheel having a template provided with a form which is the reverse of the general form to be trimmed into the periphery of a grinding wheel at a 1:1 ratio spaced from and generally parallel to the portion of the wheel to be trimmed, a holder movable across the space between the template form and the portion of the wheel to be trimmed, an elongated slide movable longitudinally between said template form and said wheel portion, a template follower at one end of said slide, a carrier movably mounted on the slide, a trimming point mounted on the carrier, an abutment on said slide, resilient means normally urging said carrier against said abutment to oppose movement of said carrier relative to said slide, means for traversing said holder across the space between said template and wheel to produce a corresponding path of movement of said trimming point while said carrier engages said abutment, and modification control mechanism operable in timed relation to movement of said follower across said template to move said carrier away from said abutment and relative to said slide to produce a modification of a portion of the path of movement of said trimming point from the shape of said template.
A wheel trimmer for trimming onto a grinding wheel for grinding gear teeth to a profile which is generally involute but is provided with a predetermined modification which extends over the gear teeth throughout an intermediate zone which is spaced from the roots and crests of the gear teeth, and in which the trimmed zone of the wheel is an annular zone adjacent its periphery which in radial section has a curvature identical with that to be ground onto the gear teeth, said trimmer comprising a first template having an involute profile thereon which has the identical curvature of the involute profile desired but without the desired modification thereof, means for supporting said template in spaced relation to the trimmed wheel zone and with the template profile parallel to the unmodified profile to be ground on the wheel, a holder movable transversely through the space between the template and the trimmed wheel zone, a slide carried by said holder and movable relatively thereto toward and away from said template and trimmed zone, a template follower on said slide, a carrier movably supported on said slide, an abutment on said slide, resilient means urging said carrier against said abutment, a trimming point on said carrier engageable with the trimmed zone of said wheel and operable while said carrier remains in contact with said abutment to trim the trimmed zone of said wheel to an involute cross-section identical with the involute form on said template, a second template adjacent said first template, a second slide carried by said holder movable in parallelism with said first slide, a second template follower on said second slide, said second slide having means engageable with said carrier and operable to move said carrier away from said abutment in accordance with the shape of said second template during an intermediate portion of the transverse movement of said holder across the space between said first template and trimmed wheel zone to produce a predetermined departure from the involute cross-section of the trimmed zone from the involute cross-section which would otherwise be trimmed on the wheel.
Dependencies are inferred from the claim text.