US2012066A - Headstock for machine tools - Google Patents

Description

Allgv 20, 1935 F. s. HAAs ET AL 2,012,066

HEADSTOCK FOR MACHINE TOOLS Filed March 3, 1934 2.Sheets-Sheet l J7 fa .Vig

Aug. 20, 1935. l F HAAS Er AL 2,012,066

HEADSTOCK FOR MACH-INE TooLs Filed Maron 5, 1954 2 sheets-sheet 2 Patented ug. 20, 1935 tuY STATES 2,012,066 lHEADSTOCK FOR MACHINE TOOLS Frederick S.- Haas and Edgar D. Vancil, Cincinnati, Ohio, assignors to Cincinnati Grinders Incorporated, Cincinnati,

of Ohio Ohio, a corporation Application March 3, 1934, Serial No. 713,887

6 Claims.

This invention relates to improvements in machine tools and particularly to improvements in grinding machines, lathes and like tools.

One of the principal objects of the present invention is therefore the provision of an improved grinding vmachine and particularly the work terminal supporting mechanism of sucha machine, such as the headstock.

Another object of the invention is the provision of a headstock particularly adapted for machines which operate on large Work pieces such as the rolls used in paper and steel mills.

A further object of the invention is the provision of a fabricated structure, that is a headstock mechanism of improved design and foxm completely of welded sheets.

A still further object of the invention is the provision of a headstock, as just referred to, which co-operates with a bed or supporting mechanism of similar fabricated construction which provides mechanism co-operating with the said immediate headstock.

Other objects and advantages of the present invention should be readily apparent by reference to the following specification, considered in conjunction with the accompanying drawings forming a part thereof and it is to be understood that any modications may be made in the exact structural details there shown and described, within the scope of the appended claims, Without departing from or exceeding the spirit of the invention.

In the drawings;

Figure 1 is a front elevation of a grinding machine embodying the improvements of the invention. Y

Figure 2 is a transverse sectional view taken substantially on line 2--2 of Figure 1.

Figure 3 is a longitudinal sectional View taken on line 3-3 of Figure 2.

Figure 4 is a horizontal sectional view taken on line 4 3 of Figure 2.

Throughout the several views of the drawings similar reference characters are employed to denote the same or similar parts.

The grinding machine as shown in the drawings comprises a plurality of blocks I0 mounted on a concrete floor Il. I0 is a bed I2 formed by welding longitudinal and transverse members to one another. To the bed I2 on the upper surface is provided a headstock base I3 from which project the usual guide ways I4. Mounted on the guide ways It at one end thereof is a tailstock I5 adapted to be shifted relative to the ways I4 toward and from the head- Supported on the blocks stock base I3. Mounted on the ways I4 between the headstock base I3 and the tailstock I5 are journal'rests I6 and Il which support the work while being rotated and tooled.

Behind the work I3 is disposed a tool carriage I9 supporting a prime mover or electric motor 20. The electric motor 20 is belted. or otherwise connected with the spindle 2| of the carriage for effecting its rotation.v Fastened to one end of the spindle 2l is a grinding wheel 22.

The headstock base I3 comprises a lower plate 22 whichextends the full width of the bed Ill as seen in Figure 2. The base plate 22 is secured to the bed I0 by suitable welding and the like 23. Welded to the upper surface of the plate 22 are longitudinal bars 23 and 25, and similarly welded to the ripper surface of said plate 22 between the bars 24 and 25 are the transverse bars 26 and 2I. From the foregoing it will be noted that the headstock base I3 has a rectangular boxlike form and this box constitutes a lubricant reservoir for holding lubricant oil to be supplied to the rotating parts of the headstock.

The headstock, itself indicated generally by the numeral 28, comprises a substantially oval shaped member 29 formed by bending a single sheet of steel. One of the long sides of the member 29 is cut away, and welded into the opening thereof is a frame 30 having formed therethrough an opening 3| co`extensive with the area formed interiorly of the bars 2t, 25, 26 and 21.

Extending transversely of the body member 29 and conforming to the contour thereof are transverse plate l'nembers v32 and 33. The members 32 and 33 are secured in position by being welded along each edge to the body member 29 and the frame 30. The cross members 32 and 33 are each provided with a pair of bores or holes 34 and 35 and 3B and'3l. Welded into the bore 34 of the member 32 is a, sleeve 38 which is in axial alignment with a sleeve 39 Welded in the bore 36in the member 33.

The sleeves 38 and 39. have secured therein a spindle 30 which is held against any movement relative to the said sleeves by sweating the same in position. From'this it will be seen that the headstock of the present invention is of the dead spindle type, that is, one wherein the spindle is not rotated with the work. At the head end of the spindle it has projecting therefrom a center il which is in axial alignment with a center 42 projecting from the tailstock I5, the said centers determining between them the initial axis of rotation of the work I8 and further acting as terminal abutments for the work during the tooling or grinding thereof.

By reference to Figure 3 it will be noted that the spindle 48 projects rearwardly of the sleeve 38 where it is reduced in diameter as at 43. Mounted on the sa'id reduced end 43 of the spindle is a bushing 44 forming a bearing for a rotatable sleeve 45. The sleeve 45 has formed integral therewith a chain sprocket 46 and has keyed or otherwise secured thereto a pulley, sheave or the like 41. As shown in the drawings, the member 41 is a sheave having formed therein a plurality oi' grooves for the exible transmission members or V belts 48. The belts-48 are in turn trained to a driving sheave 49 keyed. or otherwise secured to the shaft 50 of the motor or prime mover 5|. From this will be seen that the driving sleeve 45 is adequately rotated from the motor 5|.

The bore 35 in the headstock transverse member 32 is in axial alignment with the bore 31 in the member 33 and respectively mounted in said bores are the outer races 52 and 53 of anti-friction bearings 54 and 55. These bearings 54 and 55 support for rotation a counter or jackshaft 5 6 which projects beyond the said supporting bearings. The portion of the shaft 56 which projects beyond the transversemember 32 is tapered as at 51 and has keyed or otherwise secured thereto a large silent chain gear 58. The chain gear 58 is in alignment with the chain sprocket 46 of the driving sleeve 45 and the said sprocket and key- Way have trained about them a sprocket chain 59. The sprocket chain 59 transmits motion from the driving sleeve 45 to the jackshaft 56.

. The end of the jackshaft 56 which projects beyond the traverse member 33 is provided with a tapered portion as at 60 to which is keyed or otherwise secured a silent chain sprocket 6|. The sprocket 6| has trained thereabout a chain 62, in turn extending about a relatively large sprocket gear 63. The gear 63 is, therefore, in alignment with' the sprocket 6| and the said gear includes a hub 64 which is mounted on a bushing 65 fastened to the spindle supporting sleeve 39.

The hub 64 of the gear 63 is provided with a reduced portion on which is iitted a face plate 66. In addition, the gear 63 has welded or otherwise secured thereto a ring member 61 provided with threaded bores receiving screws 68 which pass through plain bores formed in the plate 66.

Secured in any desirablemanner to the face plate 66 is a chuck or driving plate mechanism indicated generally by theI numeral 69 and including the driving dogs 10 which when connected with the Work eiect its rotation.

' From the foregoing it will now be seen that the transmission train for rotating the work comprises the motor sheave 49 and compound sheave sprocket 41-46 carried by the rear end of the spindle and connected to the motor sheave by the belts 48. From the compound sheave sprocket 41-46 extends the belt v59 for rotating the jacklshaft 56 through the chain 59 and sprocket gear 58. A similar chain 62 driven-by a chain pinion on the'shaft 56 rotates the bull gear 63 associated with the face plate and work driving assembly.

1n view of the massiveness of the parts involved in the headstock of this invention the bull gear 63 andchain gear 58 act as fly wheels or stabilizers lWhen the work is set in motion and prevent to a surprising extent the formation of chatter marks,

atsand the like on the work.

In order to lubricate the several rotatable members of the headstock assembly the headstock frame plate 3|! has welded thereto rnd. projecting/'therefrom in overlying relationship to the motor base reservoir, a shelf 1| which supports a. pump 12 adapted to circulate the lubricant. The .pump 12 is driven by a chain 13 which extends about a gear or the like 14 associated with the pump 12 and a driving sprocket 15 keyed or otherwise secured to the jackshaft 56.

The pump 12 has extending'froin one side thereof a suction pipe or line 16 which terminates at its other end at the base of the lubricant reservoir. Extending from the other side of the pump 12 is the discharge line 11 which empties into a second pipe or conduit 18 through an oil filter'l or the like 19. The upper end of the pipe anconduit' 18 empties into an oil well indicated generally by the numeral located above the bearings of the rotation members of the headstock assembly.

The oil well 60 is formed between the traverse members 32 and 33 by a pair of side plats 8| and 82 having their upper longitudinal edges welded to the under surface of thetop portions of the headstock housing .29 and a bottom member 83 having its longitudinal edges welded to the side plates 8| and 82; The ends of both the side members 8| and 82 and the bottom member 83 are respectively welded to the traverse members 32 and 33. From this it will be seen that there has been provided a box or oil well which will contain a quantity of lubricant delivered thereto, as above explained, by the pump 12 from the reservoir. Access may be had to the well 80 through an aperture formed in the top of the housing member 29 and covered by a suitable cover plate 84.

It is through one of the oil well side members, 8| for example, that the lubricant is delivered to the well. For this reason the said side member has a coupling 85 therein to whichA the upperv a series of discharge pipes or conduits 86 which.

terminate in the several rotatable bearings of the jackshaft, sheave pinion unit i1-46 and face plate assembly 66. For example, discharge pipe or conduit 86a from the oil well terminates in a duct or port 81 formed in the sleeve member 39, which duct through additional ports or ducts 88 lubricate the bearing on which the bull gear 63 or face plate assembly rotates. Also, the discharge pipe or conduit 86e terminates at a port 91 in the sleeve 38 which through the cross and longitudinal ports 98 lubricates the bearing for the compound sheave-pinion unit 41-46. Again, pipes 86h and 66e terminate at the anti-friction'bearings 54 and 55 respectively for lubricating the said bearings, while the jackshaft 56 is being rotated and the pipe 86d extends throughthe transverse member 33 to overlie the chain 62 thereby supplying lubricant thereto during the driving thereof. pipes or conduits extend from the Well to all of the bearings and parts within the headstock which need lubricant and from which it will be seen that the said bearings are adequately lubricated during the operation of the headstock.

The lubricant, upon passing through the bearings which they lubricate, falls by gravity to the frame plate 30 from which the lubricant iinds its way to the reservoir in the vheadstock base I3. To insure the lubricant being returned to the lowest point of said reservoir where the suc.,

seen in Figure 2.- The drain board or plate 89 is welded at one en d to the longitudinal bar 24 Other .thel interior y of'the enveloping member, said transverse spacedmember's having aligned bores and at the other end to a riser 90 held in position by welding its lower end to the base plate 22.

The headstock, as a whole, is securely attached to the base I3 by a plurality .of bolts 9i and.,92

to the inner surface offthe'housing member 29 and the upper surfaceof the frame plate 3U and'y adjacent to the lateral edges thereof are blocks 93 through which are formed threadedperforations. Lying adjacent-thesaid lateral edges of the headstock housing 29 are cover plates 94 and 95 through which pass cap screws 96 threaded into the threaded bores in the blocks 93. By this construction the headstock is completely enclosed, yet the interior of the headstock may be readily reached to adjust or inspect the, chains 59 and 62 by merely removing the plates 94 and What is claimed is: y 1. Av fabricated headstock for use with machine tools comprising an enveloping member formed y by bending'to properform a single sheet of rmaterial, a pair of spaced transverse members interiorly of the enveloping member and welded to the inner surface thereof, a frame at the lower end of the enveloping member having an aper-v ture therethrough whereby access may be had to the interior of the enveloping member, said .Y

transverse spaced members having aligned bores therein, and a pair of spindle supporting sleeves welded to said transverse memberswithin the aligned bores.

2. A fabricated headstock for use with machine tools comprising ari-enveloping member formed by bending to proper form a single sheet of material, a pair of spaced transverse members interiorly of the enveloping member and welded to the inner surface thereof, a frame at the lower end of the enveloping member having an aperture therethrough whereby access may be had to the interior of the enveloping member, said transverse spaced members having aligned bores therein, a pair of spindle supporting sleeves welded to said transverse members within the alilned bores, and cover plates for the edges of they enveloping member for completely enclosing the same.

3.. A fabricated headstock for use with machine tools comprising an enveloping member formed by bending to proper form a single sheet of material, a pair of spaced transverse members interiorly of the enveloping member and welded to the inner surface thereof, a frame at the lower end of the enveloping member having anaperture therethrough whereby access may be had to chine ,tools :comprising an rformed by bending to proper of material, apairvof spaced transverse members vinteriorly ofthe enveloping member and welded as by welding, at suitable lintervals,

therein, a pair .of spindle lsupporting sleeves -V welded 'tolsaid transverse members ,Within the aligned bores,`an loil reservoir within the enveloping member and formed by Welding side and base plates to the enveloping member and transverse .members and means for supplying lubricant tothe well.

1l-A yfabricated'.headstock for use with maenveloping member form a single sheet to the inner surface thereof, a frame at the lower end ofthe enveloping member having an aperture. therethrough whereby access may be had to the interior of the enveloping member, said transverse spaced members having aligned bores therein, a pair of spindle supporting sleeves welded to said transverse members within the aligned bores,an l roil reservoir within the enveloping member and formed by welding side and base plates tothe enveloping member and transverse members,` means for supplying lubricant to the well, a supporting base for the headstock. having an area substantially (so-extensive with the headstock frame; said base having a compartment formed therein in alignment with the aperture in the headstock frame, and means for securing the headstock to the base.

5. In a headstock of the class described the combination of a housing member including a. pair of transverse supports, a supporting sleeve secured to each of said supports, a spindle carried by the sleeves against rotation, a driven member loosely journaled on the spindle, a face plate loosely ljournaled on one of the supporting sleeves, a jack shaft rotatably mounted in the transverse supporting members, a exible transmission between the driven member on the spindle and the jack shaft, and a second flexible transmission between the jack shaft'and face plate whereby the face plate is rotated.

6. In a headstock of the class described the Lcombination of a housing member including a ,a jack shaft rotatably mountedin the transverse supporting members, a flexible transmission between the driven member on the spindle and the jack shaft, a second flexible transmission between the jack shaft and face plate whereby the face plate is rotated, and a prime mover connected with the spindle driven member.

FREDERICK S. HAAS. EDGAR D. VANCIL.

Images