Broaching machine improvements
AssigneeTy Miles, Inc.
InventorGeorge C. Fields
Life of this patent
Estimating the term…
Abstract
Two vertically movable carriages are alternately reciprocated. Each carriage holds two broaches positioned at opposite sides of the ways that guide the carriage. In one embodiment workpieces are moved from a magazine between the carriages alternately to work stations beside each carriage. In another embodiment the workpieces are moved between the two broaches in a series of three steps, the first broach acting on a given workpiece during a dwell before the first step and the second broach acting on that workpiece during a dwell after the third step. In yet another embodiment the workpieces are held by a chuck which, between successive broaching strokes, rotates the workpiece about an axis normal to the broaching strokes.
Claims11
A broaching apparatus for use with workpieces and comprising a frame including longitudinal ways, a carriage movable along said ways and having broach holding means thereon, workpiece positioning means mounted on the frame, and a ram connected between the carriage and the frame for reciprocating the carriage, characterized by:
- said ways being opposite each other with said carriage therebetween;
- said carriage having four sides comprising two pair of sides with the sides of each pair being opposite each other, the sides of one of said pair engaging said ways;
- said broach holding means comprising two broach holders, with a respective one being at each of the sides of the other pair;
- said ram being secured to the carriage centrally between said ways and centrally between said broach holders;
- and
- said workpiece positioning means comprising two workpiece holders, with a respective one being adjacent each of the sides of the other pair;
- whereby during a broaching movement of the carriage the loading of the carriage from the broaches and broach holders is balanced with respect to the mounting of the carriage on the ways and its connection to the ram.
A broaching apparatus for use with workpieces and comprising a frame, two carriages side by side on the frame with each carriage having broach holding means, ram means connected to said carriages for reciprocating the carriages alternately, workpiece positioning means comprising a first station generally to one side of the first carriage and a second station generally to said one side of the second carriage, workpiece supply means for delivering one workpiece at a time to a location intermediate said two stations, and workpiece feeding means for transferring the workpieces from said location to said stations alternately, said apparatus being characterized by:
- said workpiece supply means comprising a magazine in which the workpieces are vertically stacked with a predetermined orientation, the bottom workpiece in said stack being at said location;
- and
- said workpiece feeding means comprising a transfer carriage movable between said stations and across said location, said transfer carriage having abutments facing toward each station respectively, for engaging said bottom workpiece as the transfer carriage moves toward a station and transferring that workpiece to that station.
A broaching apparatus for use with workpieces having two ends one of which is to be broached, and comprising a frame, two carriages side by side on the frame with each carriage having broach holding means, ram means connected to said carriages for reciprocating the carriages alternately, workpiece positioning means comprising a first station generally to one side of the first carriage and a second station generally to said one side of the second carriage, workpiece supply means for delivering one workpiece at a time to a location intermediate said two stations, and workpiece feeding means for transferring the workpieces from said location to said stations alternately, said apparatus being characterized by:
- said workpiece positioning means including a part of said frame at each of said stations to support the one ends of the workpieces;
- said transfer carriage having a portion supporting said one workpiece intermediate its ends as the transfer carriage so moves toward a station and so long as it is adjacent said station, said portion moving out from under that one workpiece as the transfer carriage moves away from said station whereby the one workpiece will fall away from said station;
- and
- including means engaging a side only of said one workpiece at said station and preventing said portion from dragging the one workpiece with the transfer carriage as it moves away from said station while not interfering with said fall of the one workpiece from the station.
A broaching apparatus and comprising a frame, two carriages side by side on the frame with each carriage having broach holding means and a broach held thereby, ram means connected to said carriages for reciprocating the carriages alternately, and workpiece positioning means, said apparatus being characterized by:
- each broach moving along a respective path with the two paths being parallel,
- said workpiece positioning means including a first station generally to one side of the first carriage and a second station generally to said one side of the second carriage,
- said workpiece positioning means moving a workpiece from one station to the other between broaching strokes at the two stations so that broach cuts are made on the same workpiece first at said one station and subsequently at said other station,
- said workpiece positioning means including a chuck rotatable about an axis normal to said paths, and means for returning the workpiece from said other station to said one station following the cut at said other station and for rotating said chuck a predetermined angular amount about said axis after said cut at said other station and before a subsequent cut at said one station.
A broaching apparatus and comprising a frame, two carriages side by side on the frame with each carriage having broach holding means and a broach held thereby, ram means connected to said carriages for reciprocating the carriages alternately, and workpiece positioning means, said apparatus being characterized by:
- said workpiece positioning means including a first station generally to one side of the first carriage and a second station generally to said one side of the second carriage;
- said workpiece positioning means moving a workpiece from one station to the other between broaching strokes at the two stations so that broach cuts are made on the same workpiece first at said one station and subsequently at said other station;
- said positioning means so moving said workpiece between stations in a sequence of three steps, each step occurring following a broaching movement of a carriage, said broaches being a given lateral distance apart center to center and the length of movement during each step being one-third said distance.
Dependencies are inferred from the claim text.