US1306767A

US1306767A - Automatic rough-ball grinder

Info

Publication number: US1306767A
Authority: US
Publication date: 1919-06-17
Anticipated expiration: 1936-06-17

Description

J. J. MCINTYRE AND C. KOEHLER.

AUTOMATIC ROUGH BALL GRINDER. APPLICATION FILED AUG-21.1918.

1 3%,? 6?) Patented June 17, 1919 2 SHEETS-SHEET I.

I 1/? var? F Q/ a? W, f f M 1.]. MCINTYRE AND (L'KOEHLER. AUTOMATIC ROUGP BALL smmnm. APPLICATION FILED AUGJH I918 LEQGJZQESF Patented 31111617, 1919.

2 SHEETS-SHEET 2- earths.

reared.

J'QHll' I. IVIGINTYRE AND CHARLES KQEHLER, F HARTFORD, CONNECTICUT.

AUTOMATIC ROUGH-BALL GRINDER.

.ipplication filed. ilugust 521, 1918.

To all whom 1'15 "/22 (13 concern Be it. known that we, JOHN J. Mclx'rrnn and Cuwiuins Konnia-zn, citizens of the United States, residing at. Hartford, in the county of ll'lartt'ord and State of Connecticut, have invented a new and useful Improvement in Automatic Rough-Ball Grinders, 0t which the following is a specification.

This invention relates to a machine which is designed for-grinding roughly :lorrned metallic halls touiearly finished size and shape.

The object of the invention is to provide a. machine which will continuously feed and rapidly and quite accurately grind and dis charge balls, and which is so constructed that a large number of balls will he ground at the same time and the cooperating e'riilidinc; and feeding parts, which are capable of adjustment for halls of various sizes, will he durable and can be easily restored as they become worn and used until completely worn out when other parts may he quickly substituted.

In this machine the halls are allowed to feed from a hopper into a spiral channel formed in the face of a ring which retains the halls with a yielding pressure against. the surface of a rotating grinding ring while a rotating disk carries the halls along; the spiral channel and causes them to he discharged at the end when ground.

Iii-the accompanying drawings. which illus trate an enihodinient of the invention, Figure l. shows a longitudinal vertical section taken on the plane indicated by the dotted line 1-l on Fig. :2. Fig. 2 shows a transverse vertical section taken on the plane indicated by the dotted line 2-4! on Fig. l. Fig. 3 shows, on much larger scale, a radial section through av portion of the chain neled ring, the carrying disk and the e'riiuh inp; ring. Fig. l shows a section (alien at right angles to that of Fig. on the plane indicated h the dotted line -l--:l on that figure.

The frame l of this machine is desirably a heavy casting. Journaled in the frame at one side is a horizontal shaft 2 which is proridcd at its outer end with a driving pulley 3 and on its inner end has an annular plate 4. Between the plate and the frame Specification of Letters ltatent.

llat carted June it, it'lliltl.

Serial No. 250,784.

around the shaft an anti-friction thrust hearing 5 is ariangred. On the face of the plate that is fastened. to the shaft, and secured by a-clanip ring (3, is a grinding ring 7 which is desirably made of emery, carlJO1'llI1(ll.Ull or a similar material Mounted in the frame atv the other side and tree to more longitudinally hutnot r0 late, is a. cylindrical huh Fixed on the inner end of this hub is an annular plate 9. Fastened on the face of this plateis a ring 10 prel'erahly made of cast iron, which ring in its face opposite the face of the grinding ring has a spiral channel. 11. A. spring 1'3 is arranged in the cylindrical huh in such manner as to tend to press the plate and chaniielcd ringtoward the grinding ring on. the plate l astenedto the shaft. The tension of this spring is determined by inc-ans of the screw 13 that turns in a. threaded opening in the cap ll; which is fastened to the end of the frame. This screw has a hand wheel 15 on its outer end 1 and its inner end hears againsta movable plate 16 at the end of the spring. Screws 1? which are threaded into the end of the cylindrical huh pass loosely through the cap and on the outside have nuts 18 which may he adjusted to liinit the amount of inward movement of the channeled ring; under the thrust oi the spring.

Between the adjacent l'accs of the channeled ring. which llUiBS lhOll rotate hut has a longitudinal run'einr-nt. and the grinding ringgl. which does rotate but. has, no longitudinal inorenu-nt, is a thin dish 15) which is provided with a nuniher of radial slots it) that overlie the spiral channel in the lace oi the rhannelcd ring. This dish is l'astencd to an annular plate ii that is sccured to a rotulalile arhor'fli which has one end supported h a hashing 23 in a rece s in the; "riiulin;1ring. shaft and its other end suppoited hy a hushing 12 t in a rercss in the huh wh ch supports the hanneled ring. One end of this arh'or is threaded and. proridrd with a washer 25 and nut it; which liniits the cndwisc incrementof the arhor with rciation to the hub. hastened around the edge of the slotted dislc is a gear 27 that is engaged by a pinion 28 on a shaft. .29 which is provided with a pulley' 30. The

. rotatable slotted disk and gear are desirably guided between anti-friction balls 31 carried by plungers 32 which are pressed slow speed in the same or opposite direction,

by means of the pinion and gear, while the channeled ring is adjusted by setting the spring screw and the stop nuts so that it will press toward the grinding ring with the desired force. The balls which have been placed in the hopper 35 gravitate therefrom down through the passage 36 to the inner end of the spiral channel in the channeled ring. As the grooved carrier disk rotates,-

the balls at the lower end of the feed passage are picked up by the grooves in the disk and are carried around in the spiral channel by the disk with their surfaces pressed against the grinding ring until the end of the channel is reached, and then the balls pass out through the discharge tube 37 which will conduct them back to the hopper or to any other suitable receptacle.

Balls of different size, within the range of the machine, may be ground andballs of various hardness may be ground to just the desired degree by properly adjusting the tension of the pressure spring and adjusting the nuts and screws whlch permit the pressure to be exerte'd'to' just such an extent and no, more. As the balls are fed spirally. at low speed by the slotted carrier disk and channeled ring, and the grinding ring is rotated at high speed the entire surfaces of the balls are presented to and carried across the face of the'grindingring so all unevennesses in the balls are completely removed and there is a uniform Wear on the face of the grinding material. As the face of the grinder wears away the channeled ring is allowed to follow it up by properly adjusting the screws which limit the movement of the plate and by adjusting the tension of the pressure spring. When the grinding ring is worn down so that no more can be used a new ring is readily substituted-and when the channeled ring is worn it can be taken out and refinished or another substituted. By changing the channel ring and substituting one having larger or smaller channels balls of widely different sizes may be ground. If the balls were Very much larger or very much smaller, of coursethis would necessitatena change in the carrier disk to one having larger or smaller grooves. If the balls discharge back into the hopper the machine can be set running and it will run continuously until all of the balls are ground down to the desired size, and as a large number of balls are in the machine at one timethe output of the machine is quite large.

The invention claimed is; 1. A ball grinding machineconsisting of a frame, a grinder rotarilyfmounted on the frame, a spiral guide mounted on the frame and movable toward and from the grinder, and a slotted carrier rotarily mounted between the face of the of the guide. I

2.-A ball grinding machine consisting of a frame, a grinding member rotarily mount-- ed on the frame, a member with a spiral channel mounted on the frame and movable toward and from the grinding member,and a slotted carrying member rotarily mounted between the face of the grinding member and the face of the channeled member.

3. A ball grinding machine consisting of a frame, a grinding ring rotarily mounted on the frame, a ring with a spiral channel mounted on the frame and movable toward and from the grinding ring, and a disk with radial slots extending across said spiral channel rotarily mounted between the face of the grinding ring and the face of the channeled ring.

4. A ball grinding machine consisting of a frame, a grinding member rotarily mounted on the frame, amember with a spiral channel mounted on the frame and movable toward and from the grinding member, a springfor forcing the channeled member toward the grinding member, and-'a' slotted carrying member rotarily mounted between the face of the grinding member and the face of the channeled member.

grinder and the faceil- 5. A ball grinding machine consisting of a frame, a grinding member rotarily mounted on the frame, a member with a spiral channel mounted on-the frame and movable toward and from the grinding member, a spring for forcing the channeled member toward the grinding member, means for limiting the movement of the channeled member toward the grinding member, and a slot-' ted carrying member rotarily mounted between the face of the grinding member and the face of the channeled member.

6. A ball grindin machine having a frame, an annular pla ie rotarily mounted on the frame, a grinding ring fastened to said rotary plate, an annular plate movable axially on the frame toward and from the rotary plate, a ring with a spiral channel mounted on said axially movable plate, a spring for forcingsaid axially movable plate and channeled ring toward said rotary plate and grinding ring, and a grooved disk rotarily mounted between the faces of the grinding ring and channeled ring.

7. A ball grinding machine having a frame, a plate rotarily mounted on the frame, a grinding ring fastened to said plate, a plate movable longitudinally of the frame, a ring with a spin 1 channel mounted on said longitudinally movable plate, a spring for foreing said plate with channeled ring toward said grinding ring, and a disk with radial grooves rotarily mounted between the faves 01 the grinding ring and ehanneled ring.

8. A ball grinding machine, consisting of a frame, a grimling member rotarily mounts ed on the frame, a member with a spiral channel mounted on the fran'le and movable axially toward and from the grinding memher, a spring for forcing the channeled member toward the, grinding member, a plate 1'0- taril mounted between said rotary :mereher and said axially movable member, an aslotted disk fixed to said plate between the. face of the grinding member and tile face of the channeled member.

A machine for grinding balls comprising a rotary ah 'asin snrt'ac rotary means for carrying halls about a fixed axis and hon-a1 means for moving the balls radra 1y with relation to said aXis and against said ah 'asive surface as they are carried aromld by said rotary means.

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