US1063682A - Lathe. - Google Patents

Description

J. HARTNB'SS.'

LATHE.

'1111110111011 11111111 serine. 1911.

Patented June 3,

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LATHE.

AAPPLICATION FAILED SEPT. 6, 1911.

Patented June'3,1913

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LATHE.

APPLIoATIoN FILED SEPT. s, 1911.

\ J. HARTNESS.

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LLll Illlll 'UNITED sfrnrus,l

PATENT OFFICE.

.Turns HARTNEss, or SPRINGFIELD, VERMONT.

LATHSE.

To all whom t may concern.'

Be it known that I, JAMES HARTNESS, a citizen of the UnitedStates, and resident .of Springfield, inthe county o'f Windsor and State .of Vermont, have invented certain new and useful Improvements in Lathes, .of which the following is a specification.

This inventionfhas relation to metal-.turn- 'ing machines -in .which slidin carriages are y head so as to secure a cross feed by moving the work relatively to the tool. In previous machines, the carriage and the head have sliding contact with their respective ways or shears, and considerable power is required to .effect the sliding movement of these parts on account of thelrvveight.

The present invention contemplates the reduction 4of the friction and reduction of the power necessary to move the parts, by providing a rolling contact between the Inovable part and its ways, and it further contemplates provision for securing an adjust- \ment to compensate for any wear of the moving parts.

Referring to the accompanying drawings: Figure 1 represents a front side elevationof a portion of a lathe embodying my invention, and illustrates the portion of the bed and the Work-carrying head which is movable transversely of the bed. Fig. 2 repre-` sents a transverse section through the bed and shows the head in end elevation. Fig. 3 represents a horizontal section through the lower portion of the head, and illustrates the rolling Contact between the head and the ways or shears on the bed.. Fig. 4 represents an enlarged section on the line 4 4 of Fig. 3. Fig. 5 represents a section on line 5-*5 of Fi 4. Fig. 6 illustrates one of the rolls' an the eccentric pin or spindle on which it is mounted. Fig. -7 represents the pin and roller assembled. Fig. 8 represents an enlarged section on line8-8 of Fig. 3. l Fig. 9 represents an enlarged section on line 9 9.

` of'Fg 3. Fig. lrepresents a section on fspecmcauon of Letters-raient.

Application tiled September 6, 1911. `Serial No. 647,873.

Patented J une 3, 1913.

.the line 10-10 of Fig. 8. Fig. 11 represents a side Aelevation ofthe complete machine, except thatv the tools are not shown.

The same reference characters indicate the samelor snnilar parts wherever they occur.

Referring to the drawings, the bed of the lathe is indicated at 11. f This bed may be, in Substance, like that illustrated in the pat ent hereinbefore referred to, and may be provided with the usual turretsupporting able longitudinally of the bed on the ways or Ishears 112 provided therefor.

12 indicates the cross-slidinghead, which in the present instance is provided with `two work-carrying spindles having chucks, indibe rotated and fed laterally at the same time. I do not herein' claim, however, the double spindle construction. The bed is provided at its end, underneath the head, with' two parallel webs 14, 14, which roject some what to the front and rear ofp the machine',

erably cast integral with the vremainder of the bed. Heretofore the ways or shears present invention, however, I prefer toy prodicated at 15, 16,17 and 18. These 'tracks are made of hardened steel and are substantially rectangular flat bars'or plates. Those at 15, 16, -are setv edgewise and are doweled to one of the Webs 14 as shown in Fig. 3, being firmly secured in place by screws, the 4dowelsbeing indicated at 19 and the screws at 20.

.their upper surfaces in a parallel plane with said tracks 17 are doweled on the top of the other web 14 and are secured in'place by rscrews passed upwardly thro-ugh the web as shown.in Figs. .3 .and'9, the dowels and screws being indicated respectively at 21, 22. The four blocks thus constitute, as I have stated, tracks or rails of hard material.

The upper and under surfaces of the rails 23, 24, while the tracks 17 and 18 aresimilarly engaged respectively by rolls 25, 26. These four pairs of rolls are at the four corners respectively of the head and are inside the inclosing casing of the head so as as shown in Figs. 2 and 3. These are pref# have been formed on these webs so that the head could slide thereon'. According to the vide separate tracks or guides, which are 1n- The tracks 17, 18 are set -latwise but with.

15 and 16 are respectively engagedby rolls to be protected from chips vand dust. AsA

carriage 111 (for supporting the tool) movcated at 13, so that two pieces of Work may the upper surfaces of the tracks 15, 16. The

los I shown in Figs. 3 and 4, each of the rolls 23 is rotatably mounted upon the eccentric portion a of a pin 27 which has a large head b and reduced. end c. This pin is driven friction tight into a colnplemental socket 28 formed in the side wallof the head, and the end of the pin has a slot (l to receive an implement by which it may be rotated to ellect a vertical adjustment of the roller 23. The outer end of the socket is normally closed by a threaded cap 29. vThe roll 24 which coacts with the roll 23v in engagement with the track 16 or the track 15, as the case may be, is journaled upon a pin 30 driven friction tight into a socket 31 and having an eccentric reduced portion on which the roll 24 is mounted. By adjusting the eccentric bearings for the rolls 23, 24, one of the rolls` may be adjusted relatively to the other to cause the rolls to engage their respective tracks with the proper degree of pressure, or

f both rolls may be adjusted to effect a bodily adjustment. of the side of the head.

While the rolls 23 and 24 are located in the same vert-ical plane, those at 25 are in different vertical planes than those at 26, as shown by Fig. 8. The rolls 25 are mounted on pins 32 having eccentric portions c so that the rolls 25 may be adjusted vertically by rotating the pins 32 ,more or less. The sockets 33 in which said pins are mounted are normally closed by threaded caps 34. The rolls 26 are journaled upon eccentric portions f of pins 35 which are driven to tit friction tight in their sockets but which may be rotated in one direction or the other to effect the vertical adjustment of said rolls. The rolls 25 rest upon the upper flat faces of the rails 17, 18, whereas the rolls 26 bear against the under side'of the projecting portions of said rails.

For the purpose of holding the head against movement longitudinal of the bed and the spindles due to the thrust of the tool upon the work, I provide two pairs of.

rolls 36, 37. These are located in proximity to those indicated at 25 and 26, as shown in Figs. 8,9 and 10. The rolls 36 bear against the outer vertical sides of the tracks 17, 18, whereas the rolls 37 bear against the inner vertical sides. The rolls 37 are journaled on the eccentric portions g of pins 39 which are arranged friction tight in sockets af forded by ears 40, and said pins may be rotated to adjust said rolls 37 horizontally toward or from the rolls 36. The rolls 36 are journaled on the eccentric portions of pins 41 which have squared ends L11a by which they may be rotated in the sockets in which they fit friction tight. The rolls and their bearings may be all made of hardened steel like that used for the construction ofthe tracks.

By'virtue of the construction which I have thus described, there are interposed between the head and the tracks four rolls, and these rolls are prevented from being lifted from the tracks by coacting rolls arl` ranged immediately therebelow and engaging the under sides of the tracks, and conse- `quently they positively control the path of the carriage while the cutter is operating upon the work. Each pair of rolls is adjustable relatively to each other to compensate for wear, and yet they may be all adjusted so as to raise or lower the head relatively to the tool carriage in order to compensate for any wear thatmay take place between the carriage and its waysA or shears. In addition, the engagement of the rolls 36 with what I may call the front sides of the rails 17 and 18 holds the head against any movement due to the thrust of the tool upon the work, the engagement of said rolls with said rails being maintained by the rolls 37 which engage the inner sides of said rails. The rolls 37 and 36 of each pair are relatively adjustable to compensate for wear and may be adjusted in the same direction to adjust the head transversely with reference to the tracks. Thus it will be seen that I have provided what may be called a system of roller gibs which enables the feeding of the head with a minimum of power and thereby permits the head to be provided with heavy gearing and adjuncts without adding to the manual labor of the operator in shifting the head or without using up power in moving it.

Although I have shown the roller gibs as being applied only to the cross sliding head` nevertheless it will be understood that I may apply them equally well to the tool carriage; but, inasmuch as an illustration of their application to the tool carriage would entail practical duplication of parts already shown, such illustration is omitted.

Having thus explained one embodiment of the invention, without attempting to set forth all of its forms, or all the modes of its use, what I claim is:

1. In a lathe, the combination of a work support, a tool support, one of said supports being movable wit-h respect to the other, a bed having parallel rails or guideways, and rolls journaled on said movable support and in constant rolling contact with said rails to control positively the path of movement of said support while the toolis operating upon the work.

2. In a lathe, the combination of a bed, parallel rails on said'bed, a carriage, rolls journaled on said carriage and resting upon said rails, and coacting rolls journaled on riage supporting rolls journaled on said carriage andresting upon said rails, coacting rolls journaled on said carriage and engaging the under sides of said rails, and means whereby said first-mentioned rolls and said second-mentioned rolls may be adjusted with reference to each other, substantially as set forth.

4. In a lathe, the combination of a bed, parallel rails on said bed, a carriage, rolls journaled on said carriage and `constantly resting upon said rails, and opposed rolls constantly engaging the innerv and outer sides of said rails, substantially as set forth.

5. In a lathe the combinatlon fof a bed, rails on said bed` a carriage, eccentric pins socketed in said carriage, and pairs of coacting rolls journaled on said pins and constantly and positively engaging oppo-site faces of said rails.

6. In a lathe the combination of a bed, rails affixedV to said bed, a carriage, eccentric pins socketed in said carriage, and pairs of coacting rolls journaled on said pins and engaging opposite faces of said rails. cer-- tain of said rolls engaging the top and bottom sides of said rails, and` certain other rolls engaging vertical sides of said rails.

7. In a-lathe the combination of a bed, two pairs of parallel rails of hardened steel arranged transversely at the end of the bed, a work-carrying head located above said rails, a pair of hardened steel rolls engaging the upper and under sides of each of said rails, and pins socketed in the head and on which said rolls are journaled, substantially as set forth.

8. In a lathe the combination of a bed, two pairs of parallel rails of hardenedl steel arranged transversely at the end of the bed, a Workcarrying head located v above said rails, a pair of hardened steel rolls engaging the upper and under sides of each of said rails, adjustable eccentric pins socketed insaid head and on which said rolls are journaled, rolls engaging the vertical sides pf .certain of said rails, and eccentric pins on which said last-mentioned rolls are journaled.

In testimony whereof I have affixed my signature, in presence of two witnesses.

l JAMEsHAR'rNEss. Witnesses G. W. CLARE, 4 J. W.' WALKER.

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