B - Operations – Transporting – 23 – Q
Patent
B - Operations, Transporting
23
Q
B23Q 3/06 (2006.01) B23Q 3/18 (2006.01) B23Q 16/00 (2006.01)
Patent
CA 2193071
Parallelism between two opposite surfaces of workpiece (106) is assured by referencing of three features of the edge(s) of the workpiece, the three edge features establishing a single, unique plane within the workpiece for referencing the machining operations performed on the two opposite surfaces of the workpiece. The workpiece is held by corresponding two sets of three fixture points (214a, 214b, 214c and 264a, 264b, 264c), above the surface of two corresponding fixtures (208, 258) or of one compound fixture, while machining the two opposite surfaces (206a, 206b). In this manner, problems associated with referencing off of the first machined surface, to machine the second surface, are completely avoided. This is particularly useful when machining the opposite faces of an automatic transmission valve body. The one set of fixture points is identical to the other set of fixture points, to ensure accurate positioning of the workpiece from fixture-to-fixture, or from set of fixture points to set of fixture points, in a compound fixture.
On assure le parallélisme entre deux surfaces opposées d'une pièce à usiner (106) en référençant trois caractéristiques du ou des angles de la pièce, lesquelles forment un seul et unique plan dans la pièce à usiner pour référencer les opérations d'usinage effectuées sur les deux surfaces opposées de la pièce à usiner. On maintient la pièce à usiner en faisant coïncider deux ensemble de points de fixation (214a, 214b, 214c et 264a, 264b, 264c) au-dessus de la surface de deux montages de fixation correspondants (208, 258) ou d'un montage de fixation composé, pendant l'usinage des deux surfaces opposées (206a, 206b). Ainsi, on supprime totalement les problèmes associés à l'annulation du référençage de la première surface usinée pour usiner la seconde. Le premier ensemble de points de fixation est identique au second ensemble de fixation de sorte qu'un positionnement précis de la pièce à usiner d'un montage à l'autre, ou d'un ensemble de points de fixation à l'autre, dans un montage de fixation composé, soit assuré.
Rogers Law Office
Turchan Manuel C.
LandOfFree
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