US1502099A

US1502099A - Ring-grinding machine

Info

Publication number: US1502099A
Application number: US441616A
Authority: US
Inventors: George H Higgins
Original assignee: Burd High Compression Ring Co
Current assignee: Burd High Compression Ring Co
Priority date: 1921-02-01
Filing date: 1921-02-01
Publication date: 1924-07-22
Anticipated expiration: 1941-07-22

Description

Jul 22, 1924. 1,502,099

. G. H. HlGGlNS RING GRINDING MACHINE Filed Feb. 1 1921 2 snags-Sheet 1 July .22. 1924,

G. H. HIGGINS RING GRINDING momma Fil ed F 13; 1. 1921 2 sheets-sheet, 2

Patented July .22, 19.24.

GEORGE H. HIGGINS, OF ROCKFORD, ILLINOIS, ASSIGNOR- TO BURD HIGH. OOMPRES- SION RING COMPANY, OF ROCKFORD, ILLINOIS, A CORPORATION OF ILLINOIS.

RING-GRINDING MACHINE.

Application filed February 1, 1921. Serial No. 441,616.

To all whom it may ooncem:

Be it known that I, GEORGE H. HIGGINS, a citizen of the United States, residing at Rockford, in the county of Winnebago and State of Illinois, have invented certain new and useful Improvements in Ring-Grinding Machines, of which the following is a specification.

This invention pertaining in general to grinding machines, has more particular ref erence to a special purpose machine designed for rough grinding the peripheries of cast iron piston rings. After these rings come from the foundry they are slightly over pat tern diameter due to rapping and they also have peripheral irregularities in the form of lumps, slightly raised edges or fins, blemishes, sand grains and draft; all of which are termed in shop practice, .makeage.

It is desired to remove this makeage, not

in the sense of making an initial stockremoving cut, but simply as a cleaningoperation of from .001 to .002.

One of the chiefobjects of my invention, is the provision of novel means for removing the makeage from piston rings, and to do this most expeditiously and with uniform results.

My invention, also, contemplates the provision of novel apparatus designed for grinding the periphery of any ring-like object, and is in no way limited to the grinding of piston rings. In the particular application of my invention first above referred to, I prefer to employ a power driven device for revolving a ring and which is manually operable to grip and release the ring and to move it into and out of contact with the grinding wheel. In this regard, an object of the invention is to grip the ring by clownward movement of the device, wherebythe revolving ring which rests on a table can be moved thereon into and out of contact with the grinding wheel, and to release the ring by raising the device. Thus, in the feed of the ring to the grinding wheel, the human touch is very desirable-and efiective in holding the ring against the wheel with just sufiicient pressure to insure removal of all irregularities and nottoo much stock; Also a great saving in time is effected by. the quick grip and release of the rings which is practically automatic as the operator moves the device from one position to another.

Other objects and attendant advantages will be appreciated by those familiar with this art as the invention becomes better understood by reference tothe following de scription when considered in connection with the accompanying drawing, in which Figure 1 is a front elevation of a grinding machine embodying my invention;

Fig. 2, a top view taken substantially on the section line 22 of Fig. 1 and Figs. 3, 4, 5, 6 and 7, show enlarged longitudinal sectional views taken substantially on the line 33, 44, 55, 66 and 7-7, respectively, of Fig. 1.

Referring now more particularly to the drawings, 1 have provided a suitable horizontal table 7 and a grinding wheel 8 arranged in juxtaposition, with the end face 9 of the wheel in close proximity to the table. The grinding wheel maybe continuously driven in a counter-clockwise direction viewing Fig. 1, by any suitable means, as a belt 11. The rings to be ground enter upon the table from the chute 12 and are discharged from the opposite side, down the chute 13.

The power driven device above referred to for holding and rotating each ring during the grinding operation, is in the present example, constructed as follows. driving member 14 located substantially above the table is connected'fby means of a universal joint 15 to a sectional driven member in the form of a sleeve 16 and a shaft 17 in telescoping relation. This shaft, in driving connection with the sleeve through means of a pin 18, is axially movable in the sleeve, the ends of the pin sliding in the longitudinal slots 19. A spring 21 normally holds the shaft 17 in an elevated position. As shown in Figs. 3 and 4, the shaft 17 is equipped at its lower end with a fixed but removable bracket 22, to which-a plurality of radial elementor arms 28 are pivotally connected at 24 on horizontal axes. These arms 23 revolve with the shaft and have capacity for independent vertical swinging movement. I

Suitable means may be provided for lowering and raising the shaft 17 and for moving it relatively to the grinding wheel for causing the arms 23 to automatically grip and release a ring and to move the revolving ring into and out of contact with the grinding wheel. This means, at presentmanually operable, comprises a pair of handles 25 rigidly attached by means of a bracket. 26

A rotary to a sleeve 27 loose on the shaft 17 but held against lengthwise movement thereon. When the handles 25 are raised, the outer ends of the arms 23 will gravitate to an inner position, and when the arms are lowered into a ring positioned on the table 7 the will be expanded by contact with the tabl e, and by downward pressure on the handles will be forced outwardly so as to clamp the internal face of the ring in an expanding action. The arms are of such length and their ends so shaped as to have flat contact with the inner periphery of the ring, thereby enabling a most positive driving connection therewith. For rings of different diameter, the bracket 22 may be removed and another having arms of proper length substituted therefor.

In operation, assuming the grinding wheel and shaft 1% to be driven, the operator, by downward pressure on the handles 25, lowers and directs the driving arms 23 into a ring positioned on the table. Continued downward pressure clamps the ring as described above, thereby revolving it with the shaft 17. The operator now moves the handles forwardly, maintaining the downward pressure, thereby moving the revolving ring into peripheral contact with the end face 9 of the grinding wheel. It will be observed that the ring rests on the table while being revolved, and that the operator may move the peripheral face of the ring into contact with the grinding wheel with just sufficient pressure to. insure removal of the makeage, described above. By this method the operator feels the pressure required and duration of the feed for removal of all irregularities, which obviously vary considerably in different rings. Having finished the grinding operation, the operator withdraws the ring from the wheel and swings the rotating device radially to the right to discharge the ring down the chute 13, the ring being released by raising the handles. The peripheries of the rings having been uniformly cleaned without removal of any of the stock proper except for the draft and fine scale, they are ready for the next machine operation.

It is believed that the foregoing conveys a clear understanding of the objects, and that while I have illustrated the invention as particularly applicable to the grinding of piston rings, it will be obvious that it is equally well adapted for grinding other annular objects. It will be manifest also that various changes might be made in the construction and operation without departing from the spirit and scope of the invention as expressed in the appended claims, in

which:

I claim:

1. The. combination with a grinding wheel and a table upon which a ring is adapted to rest and be moved into and out of peripheral contact with the grinding wheel, of a device for internally gripping a ring on said table, said device being driven from overhead for revolving the ring and having a handle above the ring adapted to be manipulated for freely moving the ring on the table and for bringing saiddevice into and out of operative relation to the ring.

2. The combination of a grinding wheel and a work table in juxtaposition, a power driven device including gripping elements adapted by contact against and movement in opposition to said table to internally grip and drive a work-piece on said table, and means for moving said device to bring the work-piece intoand out of contact with the grinding wheel.

3. The combination of a grinding wheel and a Work-supporting table in juxtaposition, a power-driven device including gripping elements adapted by contact against and movement in opposition to the table to be expanded by such action for automatically gripping and driving a work-piece supported on the table, and means for operating said power-driven device for gripping the work-piece and moving it onto the table into and out of contact with the grinding wheel.

4. The combination with a grinding wheel and a table on which a ring is adapted to be supported and to be moved into and out of peripheral contact with the grinding wheel, of a power driven device including expansible elements for internally gripping a ring, said device being pivotally suspended and movable vertically for bringing said elements into and out of contact with the table for gripping and releasing a ring, and horizontally for moving the ring into and out of contact with the grinding wheel.

5. The combination with a work-supporting table and a grinding wheel in juxtaposition, of a driving member above the table, a device pendent and driven from said driving member, said device having pivoted depending work-gripping elements adapted by contact with the table to be expanded to internally grip a work-piece when lowered and to release said work-piece when raised, and a handle on the device adapted to be manipulated for bringing said elements into and out of work-gripping position and for moving such work-piece on the table into and out of contact with the grinding wheel.

6. The combination of a grinding wheel and a work-supporting table in juxtaposition, a power-driven device having gripping elements adapted by downward movement in opposition to the table to internally grip and rotate a work-piece resting thereon, and means for operating said device for feeding the work-piece to and from the grinding wheel.

7. The combination with a grinding wheel and a sustantially horizontal Work-table upon Which a ring is adapted to be directly supported, revolved, and moved into and out of peripheral contact With said grinding Wheel, of a rotary device having gripping elements movable into the ring from above the table and adapted to be expanded by contact therewith for internally gripping the ring supported thereon, and a handle on said device whereby it may be directly manipulated for moving the ring on the table with respect to said grinding Wheel.

8. A machine for removing the makeage from a piston ring, comprising a grinding Wheel, a table upon Which a piston ring is adapted to be directly supported, rotated, and slid While rotating into and out of peripheral contact with said grinding Wheel, a device for internally gripping a piston ring on said table, power driven means for revolving said device, and manually operable means for freely manipulating said device to slide the revolving ring in any direction on said table for bringing the ring into operative relation to the grinding Wheel and for feeding it into and out of peripheral contact therewith.

9. Means for the removal of make-age from a piston ring including in combination with means for supporting a ring in operative relation to a grinding Wheel, a vertical power-driven shaft equipped at its lower end with a plurality of radially disposed eX- pansible arms adapted for internally gripping a ring, and a handle carried on said shaft and adapted to be manipulated for moving the piston ring into and out of peripheral contact With said grinding Wheel.

10. The combination of a ring-supporting table, a grinding Wheel, a driving shaft, a plurality of radial arms pivotally connected at their inner ends With the driving shaft and adapted by pressure of their outer ends against the table to be pressed into gripping engagement With the inner periphery of a ring positioned thereon, and means for moving the driving shaft laterally to bring the ring into and out of peripheral contact With the grinding Wheel.

11. The combination of a ring-supporting table, a grinding Wheel, a driving member above the table, a device driven and pendent from said member and constructed for movement vertically in Which to establish driving connection With a ring and movable relatively to the grinding Wheel for. bringing the revolving ring into and out of peripheral contact With said ring.

12. The combination of a table to Which rings are adapted to be fed from one side and discharged at the opposite, a grinding Wheel, a power driven device adapted to grip and release a ring by vertical movement, and manually operable means connected with said device for operating it to grip a ring at the entrance side of the table, move the ring into peripheral contact With the grinding Wheel and then release the ring at the dis charge side of the table.

GEORGE H. HIGGINS.