US1877546A

US1877546A - Grinding machine

Info

Publication number: US1877546A
Application number: US494778A
Authority: US
Inventors: Hugh M Albee
Original assignee: Leavitt Machine Co
Current assignee: Leavitt Machine Co
Priority date: 1930-11-10
Filing date: 1930-11-10
Publication date: 1932-09-13
Anticipated expiration: 1949-09-13

Description

Sept. 13, A1932.

H. M. ALBEE GRINDING MACHINE Filed Nov. 10. 1930 2V Sheets-Sheet 1 sept. 13, r1932. y ALB-EE'v I 1,877,546

GRINDINGMACHINE Filed Nov. .110'I 1930 f) 2. 'sheets-snee; 2

Patented Sept. 13, 1932 i OFFICE* HUGE M. ALBEE, F

ORANGE, SiE'Jl'JS,` ASSIGNOR T0 THE LEAVITT MACHINE conrm, or ORANGE, MASSACHUSETTS Gambino MACHINE appucanoa ma rammen-1c,v 1930.'. seria1 No. 494,778.

The invention relates to a machine, for grinding valves and valve seats, said machine eing of the general type as thatshown in my copending application Serial No. 486,-

010, filed October 2, 1930, and differing from the latter in the structure and arrangement of parts to adapt the present machine to the grinding of valve seats having various angles of bevel or inclination and to the grinding of the surfaces of the valves cooperating therewith.

The invention is illustrated in the accompanying drawings, in which Fig. 1 is an elevation of the machine as applied for grinding the seat of a valve having a central valve stem guide.

' the spindle,

Fig. 2 is a plan view, partly in section, of the machine.

Fig. 3 is an elevation of the machine arranged ;tor grinding a valve.

Fig. 4 is a detail view, partlyv in elevation and partly in section, of the support for the motor.

Referring more particularly to Fig. 1 of the drawings, 1 indicates a tubular valve stem guide which is fixed centrally and axially wit-hin the valve port or opening 2, which latter is provided with the usual tapered or beveled valve seat 3, which seat is to be ground or reiinished by means of the machine constituting the subject-matter of the present invention.4 Fitted within the bore of the valve stem guide 1 is a spindle 4 having a flat face 5 extending longitudinally of the spindle for a portion o its length, to enable a collar 6 surrounding the spindle to be securely clamped thereto, in adjusted relation,by means of a set screw 7, so that the spindle will be supported firmly, but;rotat ably in the valve stem guide, with-a predetermined length of the spindle extending above the guide.

Secured to the upper end of the spindle is a bracket l0 having a flat face 10', substantially parallel to the longitudinal'axis o which bracket includes a split sleeve formed of sections 11 and 12 embracing the upper end of the spindle and connected by bolts 13, 13.

Engaging the iat face 10 of the bracket is afiiat plate 14, which is preferably of T form, the head portion 14 of which is provided with a transverse slot 15 which connects with a longitudinal slot 15 formed in the stem or body portion of the T, which slot 15 may be interrupted by va bridge or cross piece intermediate its length to preserve the necessary elements ofstrength and rigidity of the plate. Cooperating with either of the slots 15 or 15 is a'set'screw 16, which engages a threaded opening in the flat face 10 of the bracket and serve-s to .lock the bracket and the split sleeve carried thereby 'firmly to the platewith the latter in any desired or predetermined angular adjustment with respect to the longitudinal axis of the sleeve and, therefore, in the same angular adjustment with the longitudinal axis of the spindle engaging the sleeve.

Secured to the same face of the plate 14 as the "bracket 10 is a guide-block 2O provided with a boss 20', which has a threaded opening therein to enga'ge aset screw 18 passing through the slot 15 in the plate and by means of which the guide block or member 20 is rigidly locked at any desired position of angular adjustment on the plate and also at any predetermined distance from the spindle 4. The lower *facel of the guide4 block 20, which is substantially parallel 'with the face of the plate 14,', is'provided with a dovetailed guide slot 22 to receive the beveled edges of a slide 25 secured to an electric motor 24 by means of a strap 26, the

upper face of the slide having a screw threaded socket 27 thereon, whichis engaged by a feed screw 23, which lis journaled in the guide block 20, is freely rotatable but incapable of longitudinal movement and serves to adjust the motor 24- toward and rom the axis of spindle 4.

' The-shaft 28 of the motor is p arallel with the face of plate 14, so that, in the various positions of adjustment of the machine, the longitudinal axis of the spindle 4 and the -shaft 28 of the motor will lie in the same plane. Secured to the end of the shaft 28 is 'a grinding wheel 29, the several parts lbeing capable of adjustment to bring the Vface of the grinding wheel in position to operate on the valve seat 3 and grind or refinish the same with the proper bevel or inclination. The propel' angular adjustment of the shaft of the motor 28 with respect to the spindle 4 and, therefore, to impart the proper bevel to the valve seat 3, may be accurately determined by means of a protractor p shown in dotted lines in Figs 1 and 2.

In order to feed the grinding wheeltoward the Work, a similaizscrew feed connection between the bracket 10 and the spindle 4 is provided as in the machine illustrated in the prior application aforesaid, the same comprising a threaded nut or collar 30 which is secured to the member 11 of the collar by one or more bolts 31, which nut is engaged by a feed screw 32, the lower end of which bears upon the upper end of the spindle 4, the feed screw being provided with an operating hand Wheel and with an adjustable set nut 33. by means of which it is held in its adjusted position.

The machine exemplified in the prior application aforesaid was adapted to grind valve seats of a fixed bevel or inclination and varying diameters, but they machine of the instant application is adapted to grind valve seats and valve faces of different -bevels or inclinations and varying diameters. The adjustment of the machine to vary the inclination of' the longitudinal axis of the shaft o1" the motor to grind valve seats of varying inclinations or bevels is effected by adjusting the longitudinal axis of the plate 14 with respect to the axis of the spindle 4 or adjusting the motor 24, as a whole, angnlarly with respect to the longitudinal axis of the su porting plate 14. The coarser adjustments may be effected by moving the plate 14 angularly with respect to the axis of the spindle 4 and the final or finer adj nstments may be made by angularly adjusting the motor on the plate, the parts being locked firmly in adjusted position by means of the bolts or set nuts 16 and 18, respectively. The operation of the machine, when it has been properly adjusted, is substantially the same as that illustrated in the application aforesaid, that is to say, the spindle 4 is engaged with the valve seat guide 1, so that the operating face of the grinding wheel 29 will be substantially parallel with the valve seat to be ground and will be separated from the valve seat by a slight space. The electric mot/or is started and the grinding Wheel brought into engagement with the valve seat by the operation of the feed screw 32. The machineis then bodily rotated on the spindle 4 as an axis, so that the grinding wheel will engage and resurface the valve seat throughout the entire peripheral extent of the latter. If the valve seat is of considerable width, the grinding wheel may be caused to traverse the surface of the seat radially as Well as circumferentially, the radial movement being effected by means of the feed screw 23 by means of which the motor is moved toward and from the spindle according to the direction of rotation of the feed screw.

For operating upon valve seats of varying diameters, it will be obvious that the relative adjustments of the bracket 10 and the motor 24 on the supporting plate 14 by engaging the set screws 16 and 18 in different portions of the. T slot inthe plate can be readily effected and, as stated, the angular adjustment of the shaft of the motor relative to the axis of the spindle 4 may be effected either by the adjustment of the plate 14 with respect to the bracket 10, or the adjustment of the motor 24 angularly with respect to the plate, or both.

When the machine is applied to grinding the valve face instead of the valve seat, as hereinbefore described, the spindle 4 is dispensed with and the remaining parts of the machine are adjusted and disposedin the manner illustrated in Fig. 3, that is to say, the stem of the valve, the face of which valve is to be ground, is engaged with the sleeve carried by the bracket 10 and the bracket and the motor are so adjusted on the plate 14 as to bring the operating face of the grind .ing wheel 29 opposite the face of the valve in such relation that the angle between the axis of the motor shaft andthe axis of the valve spindle is the same as the angle of inclination of the valve face relative to the axis of the valve spindle or stem. The motor is then started and the valve face moved into contact with the grinding wheel 29 by the feed device consisting of a. collar 33 abutting the member 30 secured to the split sleevel of the bracket, which collar is interiorly threaded and engaged by an exteriorly threaded thimble or sleeve 32', which is adapted to be locked to the spindle of the valve by a threaded rod 35, which acts as a set screw and also as a handle for imparting rotary movement to the thimble 32. When said adjustment has been effected, the sleeve 33 and the thimble 32may be locked together by means of a set screw 34. When the face of the valve is brought into adjusted engagement with the grinding Wheel 29, rotary movement is imparted to the valve by a cra-nk handle 50 clamped to the end of the valve spindle, the rotation of the valve bringing the entire peripheral face of the valve `to be ground into engagement With the grinding Wheel. Further feeding of the valve toward the grinding wheel may be effected by an additional partial rotation of the thimble 32 by the handle 35. The plate 14 during the operasup tion of grinding the Valve may be clamped Ma in a vise or other suitable device for holding the machine firmly in position.

From the foregoing description and illustration, it will be readily understood that,

Mtl

when applied to the grinding of valve faces, the machine may be adjusted to operate on valves of different diameters and different inclinations or bevels of the valve faces by adjusting the bracket and the motor on the supporting plate 14 in the same manner that these elements were adjusted in the application of the machine to the grinding of valve seats.

lVliat I claim is:

1. A grinding machine, comprising a plate having longitudinal and transverse slots therein, a bracket carried by said plate and provided with a spindle receiving sleeve having its axis parallel to the face of the plate, means engageable with said slots for securing the bracket to tlie plate in any selected angular adjustment, an electric motor adjustably secured to said plate with its shaft sub'ztantially parallel to the face of the plate and at any selected angular adjustment to the axis of the sleeve, and a grinding wheel on the end of the motor shaft.

2. A grinding machine, comprising a plate having longitudinal and transverse slots therein, a bracket carried by said plate and provided with a sleeve having its longitudinal axis substantially parallel with the face of said plate and adapted toreceive a spindle, means selectively engageable with said slots for securing the bracket to the plate in any desired angular adjustment, an electric inotor secured to said plate for rotating and sliding adjustment thereon with its shaft substantially parallel with the face of said plate, and a grinding Wheel 0n the end of the motor shaft.

3. A grinding machine, comprising a substantially T-sliaped plate slotted longitudinally and transversely, a bracket adjustably secured to the face ot' said plate by a set screw engaging the slot, said bracket having a spindle receiving sleeve on its outer end with its axis parallel to the face of the plate, an electric motor adjustably secured to said plate with its shaft substantially parallel with the face ofthel plate and adjustable to any selected angle to the axis of the sleeve, and a grinding wheel on the end ofthe motor shaft.

4. A grinding machine, comprising a substantially T-sliaped plate slotted longitudi-.

nally and transversely, a bracket adjustably secured to the face of said plate by a set screw engaging the slot, said bracket having a spindle receiving sleeve on its outer end with its axis parallel to the face of the plate, an

electric motor secured to the plate by a set screw engaging the slot for sliding and rotary adjustment, the shaft of the motor being substantially parallel to the face of the plate, and a grinding Wheel on the end of the motor shaft.

5. A grinding machine, comprising a plate having angularly disposed slots therein, a

bracket having a split sleeve, the longitudi nal ,axis of which is substantially parallel with the face of the plate, a. set screw traversing the slot to clamp the bracket to the plate in 4any selectedangularadjustment, an electric motor carried by the plate with its shaft parallel with the face of the plate, la set screw mounted in the slot to clamp the motor to the plate with the motor shaft in any-selected face of said plate and having a spindle rej ceiving sleeve' the axis of which is parallel to the said face, an electric motor mounted for sliding and pivotal adjustment on said plate with its shaft parallel to said face, and

a grinding wheel on the end of the motor shaft.

7. A grinding machine, comprising a spindle adapted to engage a central valve stem guide, a sleeved bracket mounted on the upper end of said spindle, a base plate secured to and adjustable on said bracket in a plane substantially parallel with the axis of said spindle, an electric motor mounted for sliding and pivotal adjustment on said plate with its shaft parallel to the face of the plate, and a grinding wheel on the end of the motor shaft.

8. A grinding machine, comprisin a spindle adapted to engage a central va ve stem guide, a sleeved bracket mounted on the upper end of said spindle and having a face parallel to the axis of said spindle, a slotted base plate abutting said face of the bracket, a set screw traversing the slot and serving to lock the plate in various positions of angular adjustment relative to the axis of said spindle, an electric motor mounted for sliding and pivotal adjustment on said plate with its shaft parallel to the face of the plate, and a. rinding wheel on the end of the motor sha t.

9. A grinding machine, comprising ajbase plate having angularly disposed slots there-l in, a bracket having a .spindle receiving sleeve on its outer end the axis of said sleeve being parallel with the face of the plate,

means selectively engageable with said slots for adjustably securing the bracket to the plate in any desired angular adjustment, an electric motor secured to the plate for pivotal and sliding adjustment relatively to the axis of the sleeve, and a rinding wheel on the end of the motor sha t.

10. A grinding machine, comprising a plate having angularly disposed slots therein a bracket having a spindle receiving sleeve thereon, and a flat base engaging said plate, a set screw engaging a slot in t e plate for locking the plate to the bracket in selected angular relation to the axis of the sleeve, an

electric motor mounted on .the Plate with Tits shaft Vparallel vwith the face o they late, 4a grinding wheel on the end ofthe sha t, atv Set e screw engaging a slotl in .the :plate to lock the 5 ymotor to the plate in adjusted angular .and spaced 'relation to the `axis. of the sleeve, va, spindle engaging the s1eeve,-means foreflecib4 iing feeding movements between the sleeve i and spindle, and means for ofeoting:move- 1'0 ments of Vthemotor toward and frompthe spindle. l `In testimony whereof I aix my signature.

n HUGH M. ALBEE.