US1674673A

US1674673A - Grinding machine

Info

Publication number: US1674673A
Application number: US623671A
Authority: US
Inventors: Martin L Williams
Original assignee: Individual
Current assignee: Individual
Priority date: 1923-03-08
Filing date: 1923-03-08
Publication date: 1928-06-26
Anticipated expiration: 1945-06-26

Description

June 26, 1928. 1,674,673

M. L. WILLIAMS GRINDING MACHINE Y Filed March 8, 1925 5 Sheets-Sheet 1 W 5 Y Z June 26, 1928. i 1,674,673 M. L. WILLIAMS.

GRINDING MACHINE Filed March a, 1925 a Sheets-Sheet 3f n N fi m 52235:: 25: 1 m

a =m l lll rvla -a w I 1 E Patented June 26, 1928.

warm 1.. WILLIAMS, or adorn BEND, mourn.

onmnme maonnm.

Application filed March 8, 1928. Serial No. 823,871.

This inventionr'elates to improvements in grinding machines and refers more particularly to a machine for vertically grinding interior sufaces, such as cylinders, of' in- 6 ternal combustionengines.

Among the salient ob ects of the invention are to provide a machine in which in place of horizontal grlnding, the cylinders are ground while positioned vertically, the' 10 work being kept stationary while the grinding wheel is reciprocated vertically and rotated at a high speed,- permitting the wet grinding of the surface; to provide a machine in which the grinding mechanism together withthe drive therefor are mounted upon a unitary head which is balanced upon vertical columns and supported by counterbalanced weights; to provide a machine in i which the head reciprocates u on ways on 20 the columns and due to the iialancing of the head, the weight of the head and pressures produced during 4 tion are substantially negligible; to provide a positively operated elevating device 25 which functions to smoothly raise and lower the head permitting accurate control of the vertical reciprocation; to rovide a machine in which, due to the stationary table upon which the work the machine and supporting ways of the columns is materially reduced; to provide a machine which is simple and accurate in operation.v

This invention is an improvement over previous application, Serial No. 537,388 filed February 18th, 1922. Onlv those parts of the improvement which are substantially different from t e previous application, and which have to do with the invention here 40 involved, will be described'in detail. Parts .of the drive together with the mounting of p brackets, has gears 30 and 31 mounted therethe motor and positioning of the eccentric sleeves have been somewhat diagrammatically shown. as their construction is substan- 45 tially identical with the construction in the previous application.

Fig. 1 is a diagrammatic side elevational view of the apparatus. Fig. 2 is a sectional view taken through the head with parts omitted. Fig. 3 is a fragmentaryview, with parts in section, of the elevating device, and Fig. 4 is an enlarged detail of the' elevating ram. 4 a

Briefly, the function of the machine is as follows:

' The head 1 mounted upon the columns the grinding opera- Y is mounted, pressure upon tion of the eccentric 2 is raised and lowered by means of a hy draulic mechanism 3 which is controlled by a mechanism 4. The hydraulic mechanism' 3 is driven through-a flexible shaft 4 from the motor 5 mounted upon the rear of the head 1. The grinding wheel 6 is driven through the belt 7 running over pulleys 8 and 9, the latter being mounted upon the upper shaft of the motor.

The weight of the head is supported by counter-balance weights positioned centrallv of the columns and not shown in the drawings. The cables supporting the head are somewhat diagrammatically shown at 10 and operate over sheaves mounted with-' in the casing 11 at the top The work, such as a cylinder block is mounted upon the universal table 12 and the head is raised and lowered into the separate holes of the cylinders while the grinding wheel is rotated at a rapid rate. Wet grinding is done by flowing water or a inding solution through the pump 13 an ipe 14 on the grinding surf-aces. This grinding fluid is drawn off from the table 12 throu h the drain 15 and is recycled after being 1- geared in the base of the machine shown at Referring now to the details-of the mechanism, and particularly to the drive of the grinding spindle,'on the lower end of' the 'motor shaft 17 is mounted a pinion 18 which m'eshes with a *gear 19 on the stub shaft-20. A second gear 21 on this shaft meshes with the gear 22 on the 'vertical intermediate shaft 23. At the top of this vertical shaft is a beveled gear 24 meshing with a second beveled gear 25 mountedupon the shaft 26 upon which are also mounted the pinions 27 and 28. A parallel shaft 29 suported just belowthe shaft .26 by suitable on. Between these gears is a clutch arrangement 32 which is 'astandard shoe clutch, Johnson type, actuated by a pivoted handle 33. By means of this clutch arrangement the shaft 29 may be driven from the shaft 26 either through the gears 28 and or through the gears 27 and 31. This permits variation in the speed of the rotasleeves which gives the grinding stone its circular .movement against the surface of the inner walls 03f the cylinders to be ground.

At the end of the shaft 29 is abevel gear 34 meshing with the bevel ring 35 mounted of the columns.

upon the outer eccentric sleeve 36. This outer sleeve is mounted inthe headand-held' in position by the bolted cap 37. Within the outer eccentric sleeve is a second eccentric sleeve 38 within which the grindingspindle 39 bears. The inner and outer sleeves are eccentrically positioned relativeto each other,

- position. Thus with the rotation of the taining the hydrau 54, shown in Figs. 3 and at 4 in Fig. 1 andsuflices to say that the reached the bottom of the outer sleeve by means of the bevel gears 34 and 35, the grinding stone traveling at a high speed will be rotated about the inner surface of the cylinder simultaneously with the verticalreciprocation of the head. Thus as the head is slowly moved downward during the grinding operation, the grinding stone will be rotating at high speed, due to the motor drive through the belt 7, and will be rotated about the axis oi the cylinder hole by the proper dialing of the eccentric'sleeve- The lower end of the shaft 17 of the motor 5 is directly connected as shown in Fig. 2, to {a flexible shaft 46, at the lower extremity of which is mounted a bevel gear 47, shown in 3, meshing with a larger bevel gear. 48. his latter gear 48 throughintermedh' ate gears rotates the shaft 49 which drives the pump 13 and also pum s mounted in the upper and lower 'tions 0 the casing 3 con- 'c mechanism.

The details of this hydraulic mechanism are purposely omitted, as this mechanism forms no part of the present invention. It ower transmitted through the flexible sha serves to automatically introduce li uids through the

pipes

50 and 51 above and below the piston 52 mounted'on the ram 53. This piston 'is positioned in a hydraulic chamber or cylinder 4. The functioning of the mechanism is briefly as follows: The head is lowered by the action of the liquid introduced above the iston which forces out the liquid below the piston through the dlscharge line 51 while the liquid is I being introduced thrgigh the inlet pipe 50 en the head has hole which is being ground, the finger 54 shown in Fig.- 1 will trip the mechanism shown diagrammatically cause a reversal of the hydraulic m which will force the liquid through the line 51' which now beabove the piston;

shaft of the motor to motor may be sleeves, an

At 55 is shown a switch having armored wire connections 56 to the motor. This yes a central control ,for the entire mec amsm positioned on theside of the columns.

A stuffing box 57 is interposed in' the coupling between the flexible shaft and the oil from the gears on the flexibleshaft.

It will be'noted that the headis balanced as to weight, the motor being positioned on one side of the columns, while the grinding spindle with its parts are on the opposite side of the columns. 4 y

A .further advantage of this prevent the passage of articular type of mechanism is the hydrau 'c lowermg and elevating device for the reciprocating head. Heretofore, where the reciprocation was produced by racks and gears, the drive was not as positive nor was the mechanism as smooth in operation as when operated hydraulically.

In place of a flexible shaft, a separate osit oned on the base for driving the hy raulic mechanism, thus ob-. viating the necessaryg connection between the head and stationa portion of the machine by the flexible sha 4. i

I claim as my invention:

1. In a grinding machine having columns and an open passageway therebetween, the combination with a reclprocating head mounted between the columns, of a grinding s indle positionedwithin eccentric a motor for driving said spindle mounted upon the head, a hydraulic ram attached to the head and automatically operated to lower and raise the head during i the grinding o eration.

2. In a grin 'ng machine having vertical columns and an open pway therebetween, the combination with a reciprocating head mounted between. the columns, of a grinding indle positioned sleeves, an a motor for driving said spindle within eccentric mounted upon the head, a hydraulic ram ateration.

'nding machine having vertical functioning to raise 3.Ina

columns, 't e combination with-a reciprocatno tie-14,07:

ing head slidabl mounted upon the ways of 881d vertical co umns, of a grinding means positioned within eccentric sleeves and adapted to be rotated to predetermined posi- 5 tions relative to the axis of the hole to be round, and a motor for drivin the grinding spindle, said spindle and driving means I nected to t e msm automatically &

lower the headat a predetermined rate during the grinding operation. MARTIN L.

WILLIAMS.