US336068A - Reamer-relieving machine - Google Patents

Description

(N0 Model.)

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I. H. RICHARDS.

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F. H. RICHARDS. y

EEAMEE EELIEVING MACHINE.

No. 336,068. Patented Feb..9, 1886..

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REAMER RELIEVING MACHINE.

Patented Feb. 9, 1886.

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UNITED STATES PATENT OFFICE.

FRANCIS H. RICHARDS, OF SPRINGFIELD, MASSACHUSETTS, ASSIGNOR TO THE PRATT da VHITNEY COMPANY, OF HARTFORD, CONNECTICUT.

REAMER-RELIEVING MACHINE.

SPECIFICATION forming par. o Letters Patent No. 336,068, dated February 9, 1886.

Application filed January 31, 1885. Serial No. 154,581.

To all whom, it may concern,.-

Be it known that I, FRANCIS H. Riom-mns, a citizen of the United States, residing at Springfield', in the county of Hampden and State of Massachusetts, have invented certain new and useful Improvements in ReamenRelieving Machines, of which the following is a specification, reference being had to the accompanying drawings, forming a part thereof. ro My invention relates to machines for relieving the cutting-edges of reamers, or those of other similar tools, either before or after hardening, by means of any suitable grinding devices. It has for its object to furnish such i5 a machine which shall be adapted to relieve the cutting-edges of a tool by reducing each land,7 or surface between the grooves of the same, to a shape conforming to a pattern that constitutes a part of said machine.

2o For the attainment of this object my invention consists in certain combinations of mechanism, which are hereinafter rst described in connection with the drawings, and afterward pointed ont in the claims.

Figure l is a top view of a machine elnbodying my invention. Fig. 2 is a front elevation of the same machine. Fig. 3 is an ele- -vation of that end of said machine which is at the right hand in Figs. 1 and 2, some parts of 3o the feeding mechanism being shown in section. Fig. 4 is a vertical transverse section in line a a, Fig. 1. Fig. 5 illustrates a modiiication of some of the parts shown in Fig. 4. Fig. 6 is a partial top view of the same ma- 3 5 chine, showing how the relative arrangement of the oscillating and feeding mechanisms may be reversed. Fig. 7 isa front elevation of the machine partially shown in Fig. 6, some parts of the feeding mechanism being shown sectioned. Fig. Sis an end elevation of the machine as seen from the right hand in Fig. 6, wheel H being removed and other parts not shown.

Similar characters designate the same parts in all the figures.

In the drawings, Figs. 1 to 4, A designates a suitable bed-plate, having means for supporting the operative parts of the machine.

l B is a carriage, which is arranged to slide 5 0 crosswise to the bed-plate on ways W, formed (No model.)

on that plate. Said carriage has bearings 2, for supporting a spindle, P, for driving the grinding-wheel G. A pulley, 3, is fixed to said spindle for communicating rotary motion to said wheel.

M and N designate, respectively, two elevated bearings fixed on the bed-plate. One of these bearings (in this case N) is furnished with a tubular slide, D, which is provided with rack-teeth 4, whereby it may be slid in said bearing.

F is an oscillating reamerliolding fixture, having two journals, 5 and 6, which are, respectively, supported in bearing M and tube D. This is provided with a center, 7, for supporting one end of reamer E, the other end of which is supported by a similar center, 8, xed in a head, 9, which is adapted to be adjustably fixed, according to the length of the reamer, on a way, 10, formed on said fixture. It should be noted that these two centers 7 and 8 should be in alignment with the aXes of journals 5 and 6, which journals should be in perfect alignment with each other.

The reamer is secured in proper position in the fixture by means of a stop, 11, fixed to block 12, which block is adjustably fixed on a way, 13, formed on the fixture, and by means of atension device consisting of block 14, tension-rod 15, and ratchet-wheel 16. These several parts are the same, substantially, in construction and operation as the similar parts shown and described in United States Patent N o. 308,669, dated December 2, 1884, to which reference may be had. Other suitable devices may be employed instead of these for holding the reamer in position in the fixture, if it be thought preferable.

The fixture is provided with means for conneeting it to a mechanism for imparting thereto a rotary reciprocating movement. This means consists of two lugs, 17, and a rod, 18, supported by said lugs, and a connecting-rod, 19, connected to said rod, or of some equivalent device.

The reciprocating mechanism/7 as I pre` fer to call it, for imparting .the reciprocating movement to the fixture, consists, essentially, of a shaft, 20, provided with means (as disk TOO 21) for holding a crank-pin, 22, which Works in the lower end of connecting-rod 19. Shaft is supported by an-y suitable bearings, as 23, secured to the bed-plate, and it is rotated by some convenient means-as, for instance, pulley 24.

For feeding the fixture along in its bearings while it is reciprocating, a feeding mechanism is placed intermediate to shaft 2() and tubular slide D, said slide being held onto journal 6 by a nut and washer at 25, in the usual manner. lBearing N has attached thereto another bearing, 0, supporting a shaft, 26, which carries a gear, 40, meshing with teeth 4 on said slide D. Shaft 20 has a worm, 27, fixed thereon, which meshes with a worm -wheel, 28, loosely tted on shaft 26, which shaft has a xed collar, 29, next to said worm-wheel. On

is placed a. sliding collar, 30, which has a pin,

31, passing through a slot in the shaft, as shown shift 20 and slide D aforesaid.

in Fig. 3. A knurled-headed screw, 32, is provided to press against said pin and force the sliding collar against the worm-wheel, thereby clamping this wheel against collar 29, and thus completing the connection between By loosening screw 32 the worin-wheel is released, when shaft 20 may revolve without feeding the fixture. A hand-wheel, H, is Xed on shaft 26, for the purpose of sliding the fixture in either direction by hand. As this is done, rod 18 slides through the upper end of connectingrod 19.

K designates a cam, which bears against a part of carriage B, for the purpose of imparting to it a slight reciprocating or-relief movement, corresponding in time to that of the xture. As shown in the figures, said part of the carriage is a cam-roll, 33, carried in a piece,

Y 34, adjustably attached to said carriage. A

spring or weight (not shown) isprovided for moving the carriage toward the cam.

In the figures thus far particularly described cam K is the same part of the machine as disk 21; but. this is not a necessary condition. They may be made separate, if desired, as hereinafter more fully explained. In practice the periphery of cam K should approximate somewhat closely to a circle, for the reason that, as a rule,y only a. small amount of relief is given to the cutting-edges of the reamer. The proper methods for the making of said cam will be understood by mechanics familiar with inachinery in which forms are reproduced from a model or pattern, so that a `particular description of the same is here unnecessary.

In Fig. 5 I have shown how shaft 20 may be arranged to have a rotary reciprocating instead of a revolving movement. As here shown, rod 19 is connected to pin 22, fixed in a lever, 35, this lever being oscillatedby a connecting-rod, 36, driven by some device that is not shown.

In Figs. 6, 7 and 8 I have shown how the arrangement of the Atixture-reciprocatinggy and splined to journal 6, and is mademto turn in-V stead of slide in bearing N, and provided with a segment, 44, instead of the rack-teeth 4', and cam Kis placed on shaft 26, instead of 20, and is made separate from disk 2l. Otherwise what is shown does not differ materially from the same parts which have been described in the preceding iigures. By comparing these three iigures and their reference-characters with the first four figures, bearing in mind the substitutions and changes above noted,this modification of the machine will be apparent without a more particular description.

The operation of my improved reamer-re, lieving machine is as follows: The reamer to. be relieved is placed and adjusted in the iixture in the same manner as described in the aforesaid Letters Patent No. 308,699, substantially as shown in the drawings. The reciprocat-l ing mechanism is adjusted to reciprocate the fixture through the required distance, either longitudinally 'or about its axis, according to the arrangement of the machine, so as to present the whole length or width of' the reamertooth, as the case may be, to the action of wheel G, the cam K being so formed and set as to impart to carriage B a slight movement toward and from said reainer, corresponding to the amount of relief to be given` said tooth. The grinding-wheel and the reciprocating mechanism being now put in opi eration by belts on pulleys 3 and 24, and partv 34 on carriage B being so adjusted as to bring wheel G against the reamer-toot'h, the feed-V ing mechanism is next put in operation by tightening screw 32, and the fixture slowly moved to gradually present every point of the tooth to the action of the wheel. During this time the motion of the cam moves the wheel or allows it to be moved to give the required shape to said tooth. On finishing that tooth, the screw 32 is loosened, and the iXture returned to its first position, ready for the next operation, and so on indefinitely. v

Having thus described my invention, I clairn 1. The combination of a suitable frame-work, van oscillating tool-holding fixture, a carriage having a reciprocating motion toward and from said fixture, and carrying thereon a grind roo .IIO Y lief movement4 to said grinding device, and u.,

neeting mechanism,substantially as described,

between said shaft and said fixture, and feed mechanism between said shaft and slide D, lo substantially as set forth.

FRANCIS H. RICHARDS.

Vitnesses:

H. W. FAULKNER, C. O. PALMER.

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