US2291268A - Production universal grinder - Google Patents

Description

y 28, 1942' A. w. WIGGLESWORTH 2,291,268

PRODUCTION UNIVERSAL GRINDER Filed May 17, 1941 s Sheets-Sheet 1 y 1942- A. w. WIGGLESWORTH 2,291,268

PRODUCTION UNIVERSAL GRINDER Filed May 17, 1941 3 Sheets-Sheet 2 L/ Z9 A I' Z]r L 18 .12; 56

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PRODUCTION UNIVERSAL GRINDER Filed May 17, 1941 3 Sheets-Sheet 5 Patented July 28, 1942 1 PRODUCTION UNIVERSAL GRINDER Albert W. Wigglesworth, Miami Beach, Fla., as-

signor to Hill-Clarke Machinery Co., Chicago, 111., a corporation of Illinois Application May 17, 1941, Serial No. 393,918

2 Claims.

This invention relates to grinding machines, and particularly to production universal grinders, namely, grinders adapted for production runs and for grinding internal as well as external surfaces of work. 7

The main object of my invention is to provide motor driven internal grinding means in conventional grinders of the type shown in my United States Letters Patent No. 2,074,308 of March 16, 1937, said internal grinding means being detachably mountable in juxtaposition to the work held by the headstock of such conventional machines.

By embodying my invention in machines of the character described, conventional grinders adapted only for grinding external surfaces are converted into universal grinders suitable for production run work.

In the drawings:

Fig. 1 is a front elevation of a grinding machine embodyingmy invention.

Fig. 2 is a plan view of part of the machine, viewed from the plane of the line 2-2 of Fig. l, but on an enlarged scale.

Fig. 3 is a transverse vertical sectional view of a part of the internal grinding means, in the plane of theline 33 of Fig. 2.

Fig. 4 is an end elevation, partly in section, as indicated by the line 44 of Fig. L

Fig. 5 is a transverse vertical sectional view, in the plane of the line 5-5 of Fig. 2.

In that embodiment of my invention shown in the drawings, the grinding machine comprises a base on which is mounted the longitudinally reciprocable work carriage H. A motor drivenheadstock unit 12 and a tailstock [3 are mounted on the carriage H and are adjustable relatively to each other to accommodate the work which is held between them for external grinding by thewheel 14. The wheel I4 and the motor l which drives it are mounted on a base [6 which is movable transversely of the machine. Thebase 16 has a forward portion I! which forms a bearing for thegrinding wheel shaft 18, which is driven through belts I9 by the motor [5. In Fig. l, the belts [9 are enclosed in the cover l9.

Referring now to that part of the mechanism which comprises the internal grinding means, I have provided the cut away forward portion ll of the grinding wheel base I6 with arail 20, shown in transverse section in Figs. 3 and 5 and in front elevation in Fig. 1. Therail 20 is rigidly connected to the Vertical face portion I! of thewheel base 16 by countersunk bolts 2|. The upper and lower edges of therail 20 are beveled or slanted rearwardly in converging directions as indicated at 22,23, respectively. Preferably the face of the rail is longitudinally recessed as indicated at 24.

As best shown in Figs. l, 2 and 3, an internal grinding tool having ashaft 26 is rotatably mounted in a bearing in atool holder 21 which comprises asplit sleeve 28 connected bymeans 29 to aplate 30 having an integrally formed rib orflange 3| extending rearwardly from the upper edge of theplate 30, said rib having an inclinedlower surface 32 which iscomplemental to theslanted surface 22 of therail 26.

The tool holder 2'! is mounted on therail 20 with theplate 3!! abutting the face of therail 20 and theflange 3| resting on thesurface 22, and after the tool holder has been moved slidably on the rail to bring thetool 25 into proper position relatively to the headstock work holding face and the work W, the tool holderis fixed in position by passingbolts 33 through apertures in theplate 30 into awedge member 34 which has anupper surface 35 complemental to thesurface 23 of therail 20. The wedge member clamps theholder plate 30 in fixed position on the rail. After thetool shaft 26 and its bearing have been positioned in thesplit sleeve 28, the sleeve is tightened on the tool by means ofbolts 36 engaging the internally screw threadedbored portions 31 of thesleeve 28.

As bestshown in Figs. 1, 2 and 5, themotor 38 on abase 39 is also mounted on therail 20 by means of abracket 40 similar in function to theplate 30 of the tool holder. Saidbracket 46 comprises a shelf 4| on which themotor 38 is supported, and said shelf has an inclinedlower surface 42 which is complemental to theslanted surface 22 of the rail on which it bears. After the motor bracket 49 has been moved on the rail into proper position relatively to thetool 25 and its holder, as shown in Fig. l, the bracket is clamped into adjusted fixed position by thebolts 43 which extend through thebracket 46 and into the wedge member 44 which has abeveled surface 45 for engaging thesurface 23 of therail 20. Thus the motor bracket is held in fixed position until thebolts 43 are loosened.

Themotor 38 is operatively connected to theshaft 26 of thetool 25 by abelt 46. Preferably themotor base 39 may be raised and lowered relatively to the bracket shelf 4| by means of the adjustingscrews 47 andpivotal mounting 48.

From the foregoing description, it will be apparent that when the work W is to be externally ground, thetool holder 21 is removed from therail 20 by loosening thebolts 33 and the clamping member34. Themotor 38 and its bracket need not be removed. Then the headstock I2 and tailstock [3 can function in the usual Way to hold and rotate the work for surface treatment by the wheel M. For internally grinding the work, the tool holder andtool 25 and themotor bracket 40 andmotor 38 can be placed in operative position on therail 20 without any need for adjustment other than sliding movement longitudinally of therail 20 to place thetool 25 in proper position relatively to the work. Since therail 26 is fixed to a part of the transversely movable wheel base It, thetool 25 can be moved laterally of its axis as required to engage internal surfaces to be ground. 7

Changes may be made in details of construction without departing from the scope of my invention. v

I claim:

1. In a grinding machine comprising a base frame having an elongated work carriage with a head stock and tail stock mounted thereon, and a base member mounted on the base frame to one side of said carriage and having an external grinding wheel spindle rotatably mountedtherein, a rail extending along and carried by one side of said base member parallel with the spindle therein, said rail having vertically spaced supporting and guiding faces, a second base'member having relatively adjustable seating and guiding faces arranged for cooperation with the corresponding faces of said rail to clamp the faces thereof at desired longitudinal positions on said rail. and an internal grinding wheel spindle rotatably 'mounted in said second base member, whereby the external and internal grinding wheels may be relatively moved in planes parallel with the axis of said head and tail stocks for grinding operations to different longitudinal extents on movement of said carriage.

2. In a grinding machine comprising a base frame having an elongated Work carriage with a head stock and tail stock mounted thereon, and a base member mounted on the base frame to one side of said carriage and having an external grinding wheel spindle, a rail extending along and carried by one side of said base member parallel with the spindle therein, said rail having lverticallyspaced supporting and guiding faces,

a pair of base members each having relatively adjustable seating and guiding faces arranged for ALBERT W; NIGGLESWORTH.

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