Work support and drive for elongate slender parts
AssigneeSnyder Corporation
InventorThomas J. Corcoran
Life of this patent
Estimating the term…
Abstract
A work support and drive chuck for slender, elongate work parts which are to be moved in a transfer line in a direction transverse to their axis in a lift and carry motion, for example, from one work station to the next for various machining or grinding operations. The chuck and center are retractable to a work clearance position and them movable to engage the center and to swallow a good portion of the part in a chuck support which grips the part at or near the center to support the part in areas where machining pressure will be applied. The chucks can be positioned at the part locating stations so that each end of a part can be properly machined but at different stations along the transfer line.
Claims12
A method of machining elongate, slender parts which are subject to bending under tool pressure which comprises:
- (a) mounting an elongate part between centers along a transfer line,
- (b) moving a hollow chuck support longitudinally of said mounted part to enclose a portion of said part within said chuck while maintaining said center support,
- (c) actuating jaws on said chuck support to grip said part between the centers to drive the part in rotation,
- (d) rotating said part through said jaws while machining the exposed end,
- (e) releasing said jaws and retracting said chuck support while maintaining said center support to clear a path of transfer motion for said part in a direction transverse to the axis of the part, and
- (f) releasing said part from said centers to permit transfer of said part.
An apparatus for machining elongate, slender parts which are subject to bending under tool pressure which comprises:
- (a) a tailstock center,
- (b) a slide base in line with said tailstock center,
- (c) a chuck assembly slidable on said slide base, said chuck assembly comprising:
- (1) a hollow rotatable chuck core having a central recess to receive one end of a part in a telescoping relationship,
- (2) a headstock support center within said core slidable in relation to said core to contact a part on an end opposite said tailstock center,
- (3) first means on said chuck assembly to maintain said headstock support center in contact with a part during relative motion of said chuck core on said slide,
- (4) chuck jaws on said chuck core to engage a part to cause rotation of said part on said centers,
- (5) second means to actuate said jaws to a part engaging and release position independent of the motion of said chuck assembly on said slide, and
- (6) third means to retract said headstock center from said part independently of the motion of said chuck assembly, and
- (d) power means to move said chuck assembly on said base to a first position wherein said chuck core is enclosing a portion of said part prior to the engagement of said chuck jaws and to a second position wherein said chuck core is withdrawn from said part subsequent to the release of said chuck jaws.
Dependencies are inferred from the claim text.