초록 ▼

A work holder assembly is disclosed for securing a workpiece on a lathe having a rotary driven shaft. The workpiece has a central hole in an end wall thereof, and said end wall will be maintained in a position substantially perpendicular to the axis of rotation of the shaft. The work holder assembly

A work holder assembly is disclosed for securing a workpiece on a lathe having a rotary driven shaft. The workpiece has a central hole in an end wall thereof, and said end wall will be maintained in a position substantially perpendicular to the axis of rotation of the shaft. The work holder assembly includes an arbor mount comprising a substantially cylindrical tube portion having an enlarged backing plate at one end. The arbor mount is provided with a central bore, the axis of which is substantially coincident with the axis of the tube portion, which central bore is adapted to receive the shaft in sliding engagement therewith. The tube portion of the arbor mount has an outside diameter that is smaller than the diameter of the central hole in the end wall of the workpiece, while the backing plate is larger than the central hole. The work holder assembly also includes a centering cone which has a larger end and a smaller end, which larger end has a diameter that is larger than the diameter of the central hole in the end wall of the workpiece. The cone also has a central bore, the axis of which is substantially coincident with the axis of the cone, which is adapted to receive the tube portion of the arbor mount in sliding engagement therewith. The work holder assembly also includes a compression cup having a base portion and a sidewall extending from the periphery thereof. The base portion of the cup has a central hole therethrough that is adapted to receive the tube portion of the arbor mount, and the sidewall terminates in a peripheral edge that is located so as to correspond with the periphery of the backing plate. In use, the arbor mount of the invention is positioned over the shaft, and a workpiece is positioned over the arbor mount in front of the backing plate. The cone is positioned over the tube portion of the arbor mount with its smaller end preceding its larger end and secured against the end wall of the workpiece. The compression cup is positioned and secured over the arbor mount so that compressive forces may be applied to the end wall of the workpiece between the peripheral edge of the sidewall of the cup and the periphery of the backing plate.

대표청구항 ▼

[ What is claimed is:] [1.] A work holder assembly for securing a workpiece having a central hole in an end wall thereof on a lathe having a rotary driven shaft, such that said end wall is maintained in a position substantially perpendicular to the axis of rotation of the shaft, said assembly compri

[ What is claimed is:] [1.] A work holder assembly for securing a workpiece having a central hole in an end wall thereof on a lathe having a rotary driven shaft, such that said end wall is maintained in a position substantially perpendicular to the axis of rotation of the shaft, said assembly comprising:(a) an arbor mount comprising a substantially cylindrical tube portion having an enlarged backing plate at one end thereof and having a central bore therethrough such that the axis of the central bore of the arbor mount is substantially coincident with the axis of the tube portion, said central bore of the arbor mount being adapted to receive the shaft in sliding engagement therewith, and said tube portion having an outside diameter that is smaller than the diameter of the central hole in the end wall of the workpiece, and said backing plate being larger than said central hole;(b) a centering cone having a larger end and a smaller end, and having a central bore therethrough such that the axis of the central bore of the centering cone is substantially coincident with the axis of the cone, said bore of the centering cone being adapted to receive the tube portion of the arbor mount in sliding engagement therewith, said cone having a diameter at its larger end that is larger than the diameter of the central hole in the end wall of the workpiece; and(c) means for securing the cone against the end wall of the workpiece; and(d) a compression cup having a base portion and a sidewall extending from the periphery thereof, said base portion having a central hole therethrough that is adapted to receive the tube portion of the arbor mount, and said sidewall terminating in a peripheral edge that is located so as to correspond with the periphery of the backing plate; whereby:(e) the arbor mount may be positioned over the shaft; and(f) the workpiece may be positioned over the arbor mount in front of the backing plate; and(g) the cone may be positioned over the tube portion of the arbor mount with its smaller end preceding its larger end and secured against the end wall of the workpiece; and(h) the compression cup may be positioned and secured over the arbor mount so that compressive forces may be applied to the end wall of the workpiece between the peripheral edge of the sidewall of the cup and the periphery of the backing plate.