US1381593A - Grinding-machine - Google Patents

Description

l. 0. RGLLINS GRINDiNG MACHINE. Anrvucmon msn auw 1,3. 1920.

Patented June 14, 1921 .Nmw

[17 Ven 0 n 754W 0 PML/'M6 Grinding UNITI-:D STATES JOHN RLLINS; 0F FRESNO, CALIFQRNIA.

@BINDING-MACHINE.

Specification of Letters Patent. .Patented J une 14, 1921.

Application led Hay 13, 1920. Serial 11o. 381,054.

Toall whom 'it may concern:

Be it known that I, JOHN O. Romans, a citizen o f Switzerland, residing at B'erkeley Hotel, in the city of Fresno, county of Fresno, and State of California, have mvented new and useful Improvements in -Machines, of which'the following is a specification.

The present invention relates to a grinding machine and has reference more particularl to a machine for grindin the beveled surgace on the disk shaped hea s of puppet valves used on internal combustion engines.

The primary object of the invention is to provide a self contained, so to speak, valve grinding outfit which will enable an one regardless of their mechanical skil or the machine shop equipment available to effect the proper grinding or cleaning of valves or the like.

The preferred embodiment of the inven- )ion is illustrated in the accompan ing draw- /ing and will be referred to as an illustrative example scription:

- In said drawing: Figure 1 is a plan view of the machine showing coperative relationship of the parts, and with the valve carried thereby in the act of being ground.

Fig. 2 is a side elevation of the machine.

Referring now to the drawings in detail, the idea in its present form contemplates practically a one piece supporting base on which the operative parts of the machine in the following detailed deare` installed. This base primarily consistsY in a mounting 1 for the motor 2, the same being directly supported by a sub-base 3 which in turn is mounted in the block 4 which block is mounted upon the base 1. The sub-base 3 preferably comprises a cross slide having beveled marginal edges and received by the cross slot that the motor is capable of a lateral sliding adjustment. To effect a fixed position of the motor 2 on the 'block 4, suitable set screws 6 nre-presented throu h the end of the block with their ends ma e to engage a side of the sub-base 3. The block 4 is adaptedtohave a sliding movement on the base 1 longitudinally of the axis of the motor. To realize this adjustment the block 1 is provided with tracks or the like 7 spaced apart and made to be received in suitable elongated slots arranged longitudinally in the block 4.

5 in the block 4 so,

A A screw 8 having a bearing 9 fixed to the end of the base 1 and having a threaded engage;-

ment with an opening made to receive it in the block 4 is adapted to be manipulated by the handle 1Q to which it is attached for running the block 4 longitudinally on thebase 1 andcarrying with it the motor 2 on which it is supported. lVith this construction, it will be readily seen that a lateral or longitudinal adjustment of the motor 2 may be readily elfected.

The motor 2 is provided with the customary the grinding wheel 12. The lateral or longitudinal adjustment of the motor above described is rendered possible4 so that the position of the wheel ,2 may be regulated as occasionA demands. The base 1 at the front of the motor extends to a plane higher than that part which supports4 the motor and terminates in a relatively long or oblong shaped support 13 for supporting the oblong shaped base 14 of the work holder. This base 14 is pivoted to the base 13 as at 15 so that the base 14, while being held against longitudinal movement is ca able of being swung around the pivot 15, Ilo control and also limit the swinging movement of the base 14, the base 13 is recessed to provide relatively long slots 16 at opposite ends of the base. Suitable thumb screws 1'( are adapted to be passed through these slots with shaft 11 on the end of which is keyedV a threaded engagement with the chuck head 18 of the wor holder and the mounting or tail stock 19 for tlie centering pin 20. 21 re resents the stemof an Ordinar puppet ya vg having the usual disk shaped' head 22 with the customary beveled surface shown at Inasmuch as it is this beveled surface desired to be cleaned and ground, the valve stem 21 is sup-ported by the chuck 24 with the disk shaped ead 22 centered by the bolt20 so that the valve stem 21 may be rotated b the shaft on which the chuck 24 is mounte 25 represents an end abutment for the shaft. In order to present the beveled surface 23 of the valve ead to the wheel 12 at the proper angle for grinding, the work holder or rather the mounting for the chuck which carries the valve is presented to the wheel12 at an oblique angle, so that the bevel on the valve head will bepresented the axis of the wheel 12. means of the thumb screws justed. Consequently,

` le \r 26 is keyed to a collar connecting the pulleys pivotal mounting of the base 14, any variation of this adjustment may be acoomplished. Furthermore with the manner of ii-iountin the motor 2, the relative position of the w leel l2 and the disk shaped head of the 'valve may be chan ed. To rotate the valve in the work holer, a drive is imparted from the shaft. 11.of the motor. It is established by a belt. from the shaft 11 to the pulley 26 which is supported by the arm 2T and the bearings 2S. The arm 2'( being fixed to the block 4 and inasmuch as the pulley 26 is supported on the arm, the distance between it and the shaft will be changed when the motor 2f 'is laterally `adthe belt from the, should be of rubber material. The pul- 2!) made to receive one end of a flexible driving shaftl() the other end of the shaft being received in a similarcollar 31 which is fixed to the pulley 32 which in turn is supported b v means of the arm 33 working in suitable bearings as :itV 34. The pulley 32 is'prescntedparallel with a pulley 35 mounted upon and keyed to shaft 25. With a belt connecting the pulleys 32 -and 35, it will renditv be seen how the necessaryrotation may heimpa-rted to the valve stem 2l through the shaft.l 25 which isin driving relation with the belt 32 and through the flexible drive shaft 30 and the belting connecting the shaft 11 and the pulley 26.

In supporting the valve in the work holder the end of the stein is of course received .by the chuck 24 and the center pin 2O is turned upon until a tension is felt on the spring 36, which is confined between the end of the shaft.i 25 and the housing 37. The subbase 3 of the motor 2 is'theu moved until the. wheel 12 is in close proximity to the beveled surface 23 of the valve. Then shaft l1 to the roller 2G or some other resilient,

the center pin 2O is again moved up to ilnpart a thrust or movement of the valve against the influence of the spring 36 until the beveled surface 23 bears against the wheel l?. T he adjustments all made and movable parts are locked together and the' motor started whereupon the grinding action will start. By means of the handle 10 and the screw S the wheel may be moved across the beveled surface of the valve head should occasion demand.

I claim: -r

1. A grinding machine having in combi for driving thesaid wheel having ashaft on which the wheel is mounted, fa. base for supporting sind motor havin y effect-lng a lateral Vor longitu mal adjustnient of the motor with the grinding w eel carried thereby, a work holder the grinding wheel is mounted, a..

.means for "r supportln the vulve with the beveledisurface ythereo presented parallel to the axis of the gl'inding wheel, means for changing. the angleof "4' inclination of the valve relative' to the grinding wheel, and means for effecting a rontact'with the beveled surface of the'valve head with the wheel un with means for adjusting said tension.

In a machine of the class described, a

der spring tension motor having a driving shaft, a grinding.-

wheel on said shaft and adapted to be driven thereb cluding a main base movable in a horizontal plane parallel to the driving shaft of the' motor. a sub-base upon which the motor is directly supported, said sub-base mounted upon the main base and movable thereon in a horizontal plane transverse to the driving shaft of the motor; and a work holder, for supporting the work in contact with the grinding wheel and at an angle to the axis of rotation thereof, and means i )r changing the horizontal angular position of the work holder.

l. A machine of the as set forth in claim 3 work is adapt-ed to be supported on the work holder in grinding contact with the grinding wheel under spring tension with means for changing the effective tension of said spring tension means.

JOHN O. ROLLINS.

, a'support. for the motor in-- being

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