US580354A - Setts - Google Patents

Description

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No; 580,354. Patented Apr. 6, 1897.

WITNESSES (Nd Model.) 3 Sheets-Sheet 2-. F. E. & F. 0. WELLS.

AUTOMATIC TURNING LATHE. No. 580,354. Patented Apr. 6, 1897.

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(No Model.) 3 Sheets-Sheet 3.

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AUTOMATIC TURNING LATHE.

No. 580,354. Patented Apr. 6, 1897.

WITNESSES I INVENTORS I fid/YGE W245, (l/rtl/ flw/z/w 0, My

NITE STATES FREDERIC E. WELLS AND FRANK O. WELLS, OF GREENFIELD, MASSACHU- SETTS, ASSIGNORS TO WVELLS BROTHERS & 00., OF SAME PLACE.

AUTOMATIC TURNING-LATHE.

SPECIFICATION forming part of Letters Patent No. 580,354, dated April 6, 1897.

Application filed August 14, 1896. Serial No. 602,754. (No model.)

To all whom it may concern.-

Be it known that we, FREDERIO E. WELLs and FRANK O. WELLS, citizens of the United States of America, residing at Greenfield, in the county of Franklin and State of Massachusetts, have invented new and useful Improvements in Automatic Turning-Lathes, of which the following is a specification.

This invention relates to automatic lathes for turning and shaping objects of metal or other substances, the object being to provide improved devices in this class of machines 'for facilitating and improving the quality of work produced thereby; and the invention consists in the peculiar construction and arrangement of the various parts of the lathe, all as hereinafter fully described, and more particularly pointed out in the claims.

In the drawings forming part of this specification, Figure 1 is a side and Fig. 2 a front end elevation of an automatic turning-lathe embodying our improvements. Fig. 3 is a longitudinal sectional view of the main spindle of the machine, the chuck and chuck-operating tube, and of other mechanisms attached and contiguous to said spindle, all as below described. Fig. 4.- is aperspective view of detail parts of the machine and is fully described below.

As heretofore constructed machine's of this class have contained a hollow spindle (here represented by T) which has been so supported in its bearings that it had no endwise movement, but the bar or rod held and rotated thereby to be operated upon by a turning or cutting tool had a feed movement by hand or otherwise within said spindle. In the machine herein described, however, said spindle itself has an endwise feed movement, and thus carries said rod, which is held by said chuck, forward to said turning-tool, and the means for imparting said endwise or longitudinal movements thereto are constructed and arranged to operate as follows:

In the drawings, A indicates the frame of the lathe, and B the head thereof, secured on one end of said frame. The hollow spindle T of the lathe, in which rods are held and rotated, is supported in suitable bearings on said frame A, as shown in Fig. 1, and has a rotary motion imparted thereto by means of a belt applied to a pulley 13 thereon. In what may be termed the forward end of said spindle is screwed a tapering bushing 3 for engagement with the tapered end of an ordinary tubular split chuck 4, which grasps and holds a rod While the latter is being operated upon, as below set forth. A chuck-operatin g tube Z, having one end engaging the rear end of said chuck 4c, is adapted to have more or less of a sliding movement in said spindle T, whereby when a rod which is to be turned and operated upon is placed in said spindle passing through said tube Z, and through said chuck the latter is driven into said bushing 3, and the jaws of said chuck are made to clamp said rod, thereby compelling the latter to rotate with said spindle. When the force which drives said tube Z against said chuck ceases to act, the tendency of the spring-jaws of said chuck to open causes the latter to recede slightly from said bushing 3 and the said jaws to be separated, and thus free the rod heretofore held thereby, and such receding movement of the chuck causes a slight similar movement of the said tube Z. The said chucking and unchucking of the rod are performed by means of mechanism usually employed on automatic screw-machines and is as follows:

A camshaft 17, driven by a worm and gear, has secured thereon the cam-drums H and 10. By the revolution of the cam-drum 10 (see Fig. 1) in the direction of the arrow shown. thereon the two oppositely-inclined cams 30 and 31, operating against the cam- studs 22 and 23 of the sleeves 7 and S, impart to said sleeves a sliding movement in opposite directions on the arm 9, thereby causing a separation of the clutch-arms X X, pivotally secured in the collar W, fixed to the spindle, and the cone Y. Said sleeves 7 and S are connected by the forked arms 24 and 25 with the grooved collar M, fixed on thespindle, and the similarlygrooved end of the cone Y. Between said collar M and said cone is located said collar W. A strap 15 is secured to the side of one of the sleeves, as 7, and the other sleeve has a stud 16 therein passing through a slot in said strap for limiting the degree of separation of the said two sleeves. The rod 40 is suitably supported in line with the axis of the hollow sping in Which it may be revolved by the said spindle; but sufficient friction in any convenient way is applied to the rod to prevent its being moved by the said spindle as the latter is given endwise movement in its bearings during the feeding operation, as described. \Vith the parts in the position shown in Fig. 1 after said unchucking has taken place the cam-stud 22 runs off of the cam 31, while the cam-stud 23 continues in engagement with the longer cam 30. Said continued engagement of the camstud with cam 30 imparts to the spindle T an endwise movement Within its bearings. At the end of such endwise movement the adj ustable collar 20 on said spindle T is in contact with the end of the bearing in the frame A, and simultaneously with the running off of the cam-stud 23 from the cam 30 the cam 31 engages the cam-stud 22, forcing the cone Y between the clutch-arms X and chucking the rod, as above described, said collar 20 holding the spindle rigid against the action of the cam 31 Immediately following this operation a suitably-located cam 31 on said drum 10, engaging with the stud 22, moves the spindle T toward the head 13 of the machine, carrying with it the rod to be operated upon. After that portion of the said rod which pro jects through the head 13 of the machine has been operated upon and cut off the abovedescribed operations for unchucking, feeding, and rechucking are repeated.

The construction and operation of the mechanism on the head B of the machine, in conjunction with the operations of the spindle just described, are as follows:

The swinging tool-holder D is supported between suitable arms of said head B on the centers 14 14, the said centers being parallel with the spindle T. An arm 53 of said toolholder projects transversely across the machine at right angles to the axis of the said spindle. (See Fig. 2.) Through the extremity of said arm 53 and adjustable therein is a stud J, the end thereof projecting through the lower side of said arm having a bearing on a sliding pattern-block I. Said block has a movement imparted thereto in line with the axis of the spindle T by the engagement ofa cam-stud 21, projecting downwardly therefrom, with suitably-located cams on the drum H. The surface of said pattern-block against which the stud J bears is given such surface configuration as is necessary to produce the required movements of the cutting-tool M against the end or side of the bar or rod 40 which is being operated upon. The said cutting-tool M is clamped in the swinging toolholder D in any suitable manner, the fine adj ustment thereof being regulated by the screw R bearing against the end of said tool, said screw adjustment being shown in Figs. 2 and 4:. As the said tool-holder D is oscillated on its centers 14 by the movement of the pattern-block I, as aforesaid, a spring 54 (shown in Figs. 1 and 4) tends to keep the stud J always in contact with said pattern-block by its compression between the arm F, secured to a stationary part of the head B, and a short arm cast on the side of the transversely-located arm 53 ofthe tool-holder D.

The machine may be so adjusted that the tool M in the holder D may begin its operation on the end of the rod 40 as it begins to move forward through the head B, carried by the hollow spindle, as before described, and as it is fed through said head any desired movement may be given to the rocking toolholder D by the surface configuration of the sliding pattern-block I and by varying the speed with which said block moves.

It is obvious from the above that a great variety of shapes can be automatically turned on this machine.

The pattern-blocks I are removably supported in the frame of the machine, and hence any change of configuration of the piece to be turned is very rapidly made.

All changes to be made in the length of an article on this machine are made by changing the pitch of the cams on said drum 10.

The cams on the drum H may be so arranged that the tool M in the tool-holder D may be brought to bear on the rod 40 while said rod is in motion endwise through said head, as above described,and the said tool then backed off until the rod has reached its limit of movemen t,when said 'tool M may again be brought to bear to make an annular cut therein, if desired, or, if the nature of the work to be turned permits the use of a suitably-shaped tool the said final motion given to the toolholder D may serve to cut ofi the turned object or article from the end of the rod. In the machine shown in the drawings, however, a cutting-off device consisting of the lever C, hung on a stud K to the head B and carrying thereon a suitable tool-support, as E, for the cutting-off tool L, is provided, and this is the preferred construction. The said cutting-off tool is operated by a cam G, secured to the face of a plate a; in such position and of the required shape to swing the tool L at the proper time against the rod 40 and cut off the finished article turned by the previous operations of the tool M on the end of said rod.

On the head B, in proper position vertically above said rod 40, as shown in Figs. 1 and 2, are located the work-rests N, of the usual form and construction for keeping the said rod 40 in line with the center of the spindle when lateral pressure is brought to bear upon it by the transverse movement of either of the tools L or M, suitable projections, as 52, being cast on the side of the head for receiving said rests, and adj usting-screws O O and a binding-bolt P are provided for adj usting and securing said rests in their proper positions.

Rests of like construction can be, if desired, located on the opposite side of said head and at right angles to said rests N. One such rest is indicated by 52 in Fig. 1.

Aside from the many advantages possessed by this machine as an automatic turninglathe it possesses the further advantage of great simplicity of construction and the working parts thereof are all easy of access.

Having thus described our invention, what we claim, and desire to secure by Letters Patent, is

1. In an automatic turning-lathe, a hollow spindle supported in suitable bearings in the frame of the machine, and movable longitudinally therein, a chuckin one end of said spindle, a cam-shaft having cam-drums thereon whereby said spindle is moved in its bearings and said chuck operated atthe limit of movement of said spindle in either direction, combined with a tool-holder pivotally supported on the frame of the machine, a patternblock having a sliding movement in said frame in line with said spindle, an arm on said tool-holder engaging said pattern-block, cams on one of said cam-drums for moving said pattern-block, and means for rotating said spindle and said cam'shaft, substantially as described.

2. In an automatic turning-lathe, a hollow spindle supported in suitable bearin gs in the frame of the machine, and movable longitudinally therein, a chuck in one end of said spindle, a cam-shaft having cam-drums thereon whereby said spindle is moved in itsbearings and said chuck operated at the limit of movement of said spindle in either direction, combined with a tool-holder pivoted on each side of the center line of said spindle, and swinging transversely thereto, a cam on said cam-shaft for engaging and operating one of said tool-holders, and a pattern-block having a sliding movement 011 the frame of the machine engaging and operating the other of said tool-holders, suitable cams on one of said cam-drums for moving said pattern-block,

FREDERIC E. WELLS. FRANK O. WELLS.

Witnesses:

PEARL HASKINS, JOHN D. BoUKER.

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