US782238A - Steady-rest for metal-working machines. - Google Patents

Description

B. M. W. HANSON.

PATENTED FEB. 14, 1905.

STBADY REST FOR METAL WORKING MACHINES.

APPLICATION FILED NOV.18, 1902.

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Patented February 14, 1905.

FFICE.

BENG" M. IV. HANSON, OF HARTFORD, CONNECTICUT. ASSIGNOR TO PRATT 8: WHITNEY COMPANY, OF l-IARlFORl), CONNECTICUT, A

CORPORATION OF NElV JERSEY.

STEADY-REST FOR METAL-WORKING V MACHINES.

SPECIFICATION forming part of Letters Patent No. 782,238, dated February 14, 1905.

Application filed November 18, 1902. Serial No. 131,807.

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Be it known that I, BENGI MJV. Hanson, a

citizen of Sweden. residing at Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Steady-Rests for Metal-'orking Hachines,of which the following is aspecilication.

My invention relates to steady-rests, and has for its object the provision of a device of this character which maybe mounted upon the tool-bearing carriage of a metal-working machine in such manner that it will at all times bear upon the work at a point adjacent to said tool, and thereby more effectually prel vent chattering and springing of said work.

A turther ob ectof the invention is the provision of a stezuly-rest so constructed that interchangeable bushings may be inserted therein, said bushings being adapted to receive stock of different diameters.

Further objects and advantages of the invention will be set forth in the detailed description which now follows.

In the accompanying drawings, Figure l is a side elevation of a portion of a metal-working machine with my improved steady-rest mounted thereon. Fig. is a horizontal section of a portion of the tool-bearing carriage upon which the steady-rest is mounted, showing one kind of tool with which the invention may be utilized. Fig. 3 is a vertical section of the steady-rest. Fig. 4 is a detail perspective view of one of the interchangeable bushings. Fig. 5 is a face view of one of said bushings, and Fig. 6 is a side elevation of the binder with which the cam-shaft cooperates to clamp the steauly-rest to the tool-bearing carriage.

Like characters designate similar parts.

throughout the several views.

Referring to the drawings, the numeral 5 designates the frame or bed of a metal-working machine having a rotary work-grasping chuck 6 and tail-stock T, with center 7. Mounted for longitudinal movement upon ways of the bed 5 is a reciprocatory carriage 8, upon which a tool-bearing carriage 9 is transversely adjustable. In Figs. land 2 the tool 10, borne by the aforesaid carriage, is illustrated as a milling-cutter, although it is distinctly to be understood that any other kind of tool may be substituted therefor if desired and that the steady-rest may he applied to turning-lathes and various metal-working machines different from that shown without departure from the invention. Tool 10 is secured to a shaft 12, and rotary motion is imparted thereto by suitable gearing 13, mounted in a casing 14:, as best illustrated in Fig. 2.

To prevent the work from springing or chattering while the milling-cutter ll) is in operation upon stock 15. an improved follow or steady-rest is employed, which is designated in a general way by 16 and is adjustable upon a way 17 of the base of the toolbearing carriage toward and from the cutter-spindle. This follow or steady-rest comprises a standard 18, having its base preferably longitudinally grooved at 18 to lit upon the guideway 17, and on its inner side said standard is provided with a parti-cylindrical open-sided groove or recess 18 for the reception of the work or of interchangeable bushings 19, open at one side and fitting over said work, each interchangeable bushing being secured in place by a pin 20, passing through the overhanging curved end of the stamlard and its end entering an elongated slot or socket 21 in the bushing. as shown in Fig. 3. As best illustrated in Figs. I and 5, each of the interchangeable bushings 19 has a parti-cylindrical bearingsurface which bears against the work, each said bushing being cut away at 19 to so augment its interior diameter that as the toolbearing carriage, and in consequence the steady-rest, approaches the tail-center this enlarged portion will permit said tail-center to enter the bushing, and thereby allow the cutter 10 to continue its cutting action to the end of the stock. The bearing-surface 19 of each bushing is also cut away or flared on its ends, as at 19, so that the bushing may be readily slipped upon and withdrawn from the stock and still afford a proper support for the same, as shown in Figs. 3, 4, and

Referring more particularly to Fig. at, it will be seen that by making the socket 21 elongated, as therein illustrated, the bushing l 19 will be permitted a limited longitudinal play in the recess 18 of the standard 18, so that should the tail-center come into contact with the shoulder formed between the surfaces 19 19 before the cutter 10 has reached the end of the stock said bushing will remain stationary against the tail-center, while the steadyrest continues to move toward the right in Fig. 1 until said operation is completed.

Standard 18 is provided with a longitudinal bearing 23, enlarged at 23 for a purpose hereinafter stated, and the base of the carriage 9 is formed with a longitudinal T-shaped slot 24. For securing the column or standard 18 in the desired position with relation to the work a binder 25, having a rectangular head 25', fitted in recess 23 of said standard, is employed. This binder is perforated at 27 and is provided with a flanged base 28, separated from its perforated head by a shank 29, said base and shank fitting in the T-shaped slot 24 of the base 9' of carriage 9, as illustrated in Figs. 1 and 3.

Secured against longitudinal movement in bearing 23 of standard 18 by a screw 30 entering a groove 30 in its periphery is a camshaft. 31, having an eccentric or cam portion 31, and attached to the end of said camshaft is a handle 32. As will be seen by Fig. 3, the eccentric portion of the cam-shaft passes through the opening in the head of the binder 25, and it is evident that when the rod is turned by its operating-handle said eccentric will raise and lower the binder, to thereby either release or secure the standard 18 in the place to which it has been adjusted. Other means may be substituted for accomplishing this result without departure from the invention, which is not limited to those shown.

In the operation of the machine this improved steady-rest is employed as follows: The stock having been grasped by the chuck 6 and adjusted upon the tail-center 7 the steady-rest is advanced until the bearing-surface 19 of bushing 19 rests against said stock. The steady-rest is then clamped in position by turning the cam-shaft 31 by handle 32 to raise the binder 25, and thereby clamp its T-head against the walls of the guide-groove 24, and the machine being then set in motion the steady-rest and cutter travel with the carriage 9 until the completion of the operation, the work being continuously supported against the thrust of the cutter, as above described.

Changes may be made in the form and proportions of the parts, and while a millingcutter is shown the invention is not limited thereto. a

Having thus described my invention, what I claim is 1. A steady-rest comprising a support, and an open-sided bushing fitted for longitudinal yielding movement on said support.

2. A steady-rest comprisingastandard having an open-sided recess, and an open-sided bushing normally held stationary in said recess, and mounted to yield endwise when encountering an obstruction.

3. A steady-rest comprising a standard having an open-sided recess, an open-sided bushing normally held stationary in said recess, and mounted to yield when encountering an obstruction, and a device for retaining said bushing and limiting its movement.

4. A steady-rest comprising a standard having an open-sided recess, and a bushing having open-sided recesses, one of greater diameter than the other,said bushing being mounted in the recess of the standard.

5. A steady-rest comprising a standard having a recess open at its side; a bushing hav ing open-sided recesses, one difiering in size from the other, fitted in the recess of the standard; and a retaining device for said bushing.

6. A stead y-rest comprising a standard having a seat; an open-sided bushing having an elongated recess, and fitted in said seat; and a retaining-pin carried by said standard, the free end of said pin entering said elongated recess.

In testimony whereofI afiix my signature in presence of two witnesses.

BENGT M. W. HANSON.

Witnesses:

H. E. BAILEY, FRANK G. CAMPBELL.

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