US2326391A

US2326391A - Shaft milling and grinding machine

Info

Publication number: US2326391A
Application number: US365535A
Authority: US
Inventors: Owen D Premo
Original assignee: Individual
Current assignee: Individual
Priority date: 1940-11-13
Filing date: 1940-11-13
Publication date: 1943-08-10
Anticipated expiration: 1960-08-10

Description

'Aug. 10, 1943.

o. 0.. PREMO 2,326,391

SHAFT MILLING AND GRINDING MACHINE Filed NM? 13, 1940 4 Sheets-Sheet l INVENTOR.

ATTbRNEYS.

Aug. 10, 1943; o. D. PREMO 2,326,391

SHAFT MILLING AND GRINDING MACHINE Filed Nov. 13, 1940 4 Sheets-Sheet 2 m 0werz/J.Pfiem0 IN VEN TOR.

A TTORNEYS.

Aug. 10, 1943. o. D. PREMO SHAFT MILLING AND GRINDING MACHINE Filed NOV. 15, 19450 4 Sheets-Sheet 3 JNVEN TOR.

Aug. 10, 1943. o, PREMQ 2,326,391

SHAFT MILLING AND GRINDING MACHINE Filed Nov. 15, 1940 4 Sheets-Sheet 4 i 291 i I i '1 l. i 0

39 4 4/ Barrens a 34 INVENTOR.

ATTORNEYS.

Patented Aug. 10, 1943 UNITED STATES PATENT OFFICE SHAFT MILLING AND GRinnrNo insomnia.

7 Owen D. Fremmjlv iuskegon Heights Mich. Application November 13, 940, Serial No. 3653 2. Ca s.

This invention relates to shaft milling and grinding machines, the primary object. of the invention being to provide a machine of this 7 the cutter to rotate in a direction to equalize the cutting forces; 7

Still another object of the invention is to-provide a machine which maybe used in accurately forming molding from metal or wooden bar stock.

With the foregoing and other object in view, which will appear as the description proceeds, the invention resides'in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the. precise embodiment of the invention herein described, may be made within the scope of what is claimed, without departing from the spirit of the invention.

Referring to the drawings:

Figure 1 is a .plan view of a machine con structed in accordance with the invention. I

Figure 2 is a side elevational View thereof.

Figure 3 is a longitudinal sectional view through the machine.

Figure 4 is a modified form of the invention illustrating the principles of the invention as carried out in a pencil sharpening device.

Figure 5 is a sectional View taken on line 55 of Figure 4.

Referring to the drawings in detail, the base of the machine is indicated by the reference character 5, the base being supported by bolting the base to the lathe, traveling head or machine with which the attachment is used, as by means of bolts 6.

The body portion of the machine comprises substantially circular members I whichare hollow and have their open sides disposed outwardly, as clearly shown by Figure 1 of the drawings. Openings 8 are formed in the members 1, and

der treatment, may passv from the circular meme bersf 1. Tubularshafts 9 operate in openings formed at thefinner. ends of the circular mom-i bersl, the tubula'rshafts 9 providing bearings for. the bar under treatment, which in the present showing is, indicated at'A.. Keyed to the 1111-; bular shafts 9 are. plates Iii which are disk-like. in formation, the-plates being, boltedto the gear H as by means of bolts lZ' whichpass through the. plates [0. and gear. The. gear 11' is formed with. a central opening, so that the bar maybe passed through the. machine and through the gear. The circular members 7, are formedwith recessed portions. in which the ring gears i3 are mounted. Keyed. to the outer ends of the tubue lar shafts 9. are arms 14 which have openings formed adjacent to. the outer ends. thereof, which openings receive the. tubular bearings E5 to which the cutters ifiIare. secured, the cutters lfi havin openings to receive theinner ends of the tubularbearings, where the tubular bearings are selcuried to the cutters, by means of the screws I1... Extending into. the. tubular bearings lii are shafts [8. that. have reducedend on which. the gears H) are mounted, the gears t9 meshing with the ring gears 13. The gears I9 are secured to the shafts l8 to rotate therewith.

As shown, the inner ends of the shafts 'IB are tubular and are formed with slots extend bearings l5, the coiled springs being normally provide clearances 50 that material such as chips,

grindings or the like removed from the bar ununder tension, to urge the cutters It towards their work, and to compensate for material removed from the work by the cutters.

The inner ends of the tubular shafts 9 are keyed to the plates It, so that rotary movement of the gear II, will produce a relative rotary movement of the tubular shafts s towrotate the arms 14. Power is applied to the gear I I, through" the worm 22 ,mounted on'one end of the power shaft 23, that in turn is rotated by the motor 24. Thus it will be seen that due to this construction, the bar or work under treatment, will be engaged by the cutters It, operating at; opposite sides of the work, and due to the rapid rota-- tion of the cutters, the bar moving through the machine, will be ground or milled accurately and evenly.

The shafts l8, are disposed in openings formed in the hollow supports 25 that are provided with bearings 26 extended into bearing openings formed in the covers 21 that are used to guard the cutters. These covers 21 are bolted to the circular members I, by means of the bolts 28.

In the form of the invention as illustrated by Figure 4 of the drawings, the principle of the invention has been used in tapering the ends of bars or the like, and in the present showing, the cutters are used in a pencil sharpener. The reference character 29 designates 'the'hollow base of the sharpener, in which the motor-30 is mounted. The body portion of the sharpener is indicated by the reference character 3| and as shown, is provided with a threaded annular flange 32 fitted within the upper end of the hol low base 29. The body portion 3| is formed with will cause the cutters 36 to rotate, to accomplish the tapering result.

What is claimed is:

1. A shaft milling machine comprising a base, a body portion mounted on the base and comprising hollow members, aligned hollow shafts extending into the hollow members, pairs of arms having bearings, secured to the inner ends of said hollow shafts and operating within the a central opening providing a bearing for the vertical shaft 33 that extends into the hollow base 29 to connect with the motor shaft. At the upper end of the shaft 33, are arms 34 that have openings disposed adjacent to the free ends thereof, for the reception of the'hollow shafts 35, which shafts are identical inconstruction with the members -l5.' The cutters are indicated by the reference36 and have their opposed inclined surfaces so arranged that they will engage opposite sides of the workto taper or sharpen "the endthereof. Extending into the hollow shafts 35, are shafts Sl'thateXtend through the movable casing 33 and are supplied with gears 39 at their outer ends, the gears 39 meshing with the ring gear 40 held stationary within the body portion 3|.

Coiled springs Mare mounted within the 1101- I low shaft 35 and bear against the shaft 31, nor

mally urging the cutters 36 towards eachother, to insure the cutting faces thereof being held to their work to compensate for material removed from the work. It will be seen that as the shaft 33 is rotated, the member 38 together with the shafts 3'! will be rotated in horizontal planes. As the members 38 rotate, the gears 39 will rota'te by reason of their contact with the ring gear). This rotary movement of the gears '39 hollow members, a gear secured to the adjacent 'ends of the hollow shafts between the hollow members, ring gears secured within the hollow members, shafts mounted in the bearings of the pairs of arms, pinions on the outer ends of the latter shafts, said pinions being in mesh with the a ring gears, milling tools mounted on the inner ends of the latter shafts, said milling tools extending into the tool support-Said arms having bearings at their free ends, hollow tool shafts extending through the bearings, grinding tools on the inner ends of the tool shafts, shafts extending into the tool shafts, the pinions on the latter shafts meshing with the ring gears, coiled springs mounted within the hollow tool shafts and bearing against the inner ends of the shafts extending into 'the tool shafts, and adapted to normally urge the tools inwardly towards the shaft being milled, said hollow body portion having openings in the ends thereof through which a shaft to be milled is moved, and means for rotating' said tools around the shaft being milled.

,V-OWEN D. PREMO.