US1028600A - Cylinder-boring machine. - Google Patents

Description

H. A. PEDRIGK CYLINDER BORING MACHINE.

APPLICATION F ILED APR.16 1909.

Patented June 4, 1912.

2 BHBETS-BHEET 1.

H. PEDRIGK. CYLINDER BORING MACHINE.

APPLICATION FILED APB..16, 1909.

Patented June 4, 1912.

5 s 5*; 2 SHEETS-SHEET 2. I? l/ 1 T m I T'T )JL/ f I v i an ordlnary UNITED STATES PATENT OFFICE.

HOWARD A. PEDRICK, or rmtAnnnHrm}, Pi:imsYLvAmA, .ASSIGNOR TO K. B. unnnawoon & oomranr or PHILAIH'IEZPHIA, PENNSYLVANIA, A FIRM.

.oYLmnnn-BonmG MACHINE.

0 all whom it may concern:

Be it known that I, HOWARD A. Penman, a .citizen of theUnitedStates, residing in Philadelphia, Pennsylvania, have invented certain Improvements in Cylinder-Boring Machines, of which the following is a specification.

The object of my invention is to provide a machine for the quick, accurate and con venient boring or reboring of the cylinders of gas engines or other structures in which the cylinders are closed at one end and consequently will not permit of the use of boring bar, the invention being especially applicable to the boring or reboring of the cylinders of thattype of engine having a plurality of cylinde'rs formed in a single casting, the rotation of which during the boring o eration is inconvenient if not impract-icab e.

In the' accompanying drawings'-Figu're l is a perspective view of a cylinder boring machineoonstructed in' accordance with my invention; Fig. 2 is a plan or top view of a portion'of the same, Fig. 3 is a view. partly in elevation and partly in vertical section, and on a larger scale than Figs. 1 and 2, and Fig. 4 is a horizontal section on the line a-a, Fig. 3.

In the drawing, 1 represents a threearmed frame or spider mounted upon suitable legs 2 and having a depending twopart housing 3 which provides a bearing for the hub of a worm wheel 4;, the latter being contained in a chamber within said housing, and meshing with a worm 5 on a transverse driving'shaft- 6, located atone side of the housing and free to turn in,

bearings in a cap 7 lted to the side of the housing, as shown in Fig. 3. Y V

Connected to the hub of the worm wheel 4 by a spline and groovetFig. 4) or other equivalent means, is a which is thus compelled to rotate with the worm wheel but is free to slide vertically back and forth through the same, this spindle carrying, at its upper end, a boring head 10 with projecting cutters 11, ,as shown in Fig. 3.

Secured to and depending from the lower end of the worm wheel hub is a sleeve 12' whose lower end has its bearing'in a ring 13 provided with ir'fiange which is mounted upon and secured to a three-armed frame or spider 14, the latter being mounted up'on boring spindle 9,

Specifioatidn of Letters Patent. Patented J 11 4,, 1912,

Application filed April 16, 1909. Serial No. 490,265. I

brackets 15 secured to the supporting legs 2 of the machine; 3 y

Bolted to the lower end of the sleeve 12 is a head 16 having a projecting arm ,17 carrying a depending spindle 19, and upon the latter is free to turn a hub 20, having. at its lower end, a star wheel 21 to which intermittent movements of partial rotation are imparted by contact of the arms of the wheel with a pin 22 projecting upwardly from a plate 23, the latter being suspended from. the frame or spider 14 by means'of depending posts 2 1. 1

To the hub '20 of the star 'wheel2-1 is keyed a spur pinion 25 which meshes'with a spur wheel 26 secured to the stem of a feed screw 27 the latter being contained within a 'centralopening of the:boring spindle 9 and engaging with a nut 29 let unto the lower end of said spindle, and'suitably secured therein. On each rotationof the sleeve 12, therefore, one of th e'arms of the star wheel 21 will contact with the pi n and a movement of partial rotation will be lmparted to said star wheel and thence, through the gearing described, to

the stem of the feed screw 27 so as to efiect' I movement of the boring spindle.

The plate 23 has an outer circular row of openings 30 and an inner circular row of openings 31-, these rows of openings be-' ing on opposite sides of the axis of the star wheel 21, whereby, when the pin 22 is ap-' plied to an opening of the outer row, contact of the arms of the star wheel therewith will cause said star wheel and consequently the feed screw 27 to turn'in one direction,

while, if the pin is applied to an .opening'of the inner row, contact of the arms of the star wheel therewith will cause said star wheel andfeed screw to rotate in the opposite direction, consequently either an upward or a downward feed can be imparted to the boring spindle 9 by said feed screw.

The rate of feed is determined by the number of'pins 22 employed, each rotation of the sleeve 12-causing movement of the star wheel 21 to the extent of as many arms of the same as' there are pins so that the rate of feed of .thfi.boring tool can be readily regulated by increasing or decre'as ting the number of these pins carriedby the plate 23.

The stem of lar 32 resting upon the head 16 atthe bottom of the sleeve 12 and! said stem has, at its lower end, a 11 nd wheel 33 whereby the feed screw can be quickly rotated and the boring spindle quickly retracted when the boring operation has been completed, the

sleeve 12, in such case, being turned to such position that the rapidly rotating star wheel 21 will not come into contact with a pin 22. In each of the arms of the frame or spider 1 is a radial slot 34 and paralleling this slot on the top of the spider I are ribs 35, one

on each side of the slot. (See Fig. 2.) Upon these ribs are mounted blocks 36 which serve for the support of the cylinder structure which is to be bored, said supporting blocks being adjustable from and to- -ward the axis of the boring spindle, to suit different sizes of cylinder structures and being secured in position after adjustment by means of clamping bolts 37 passing through the slots 34. v

The supporting blocks 36 have undercut grooves 39 for the reception of the heads of clamping bolts 40, nuts upon the latter acting upon dogs 41 supported upon blocks 42 at their outer ends and engaging, at their inner ends, a flange upon the cylinder cylinder structure in a fixed position and downwardly therefrom,

the rotation of the boring head permits of the operation of the machine with the application of a minimum amount of power and renders it possible to accomplish the accurate boring of the cylinder irrespective of the irregular shape of the cylinder structure or of the number of cylinders contained therein.

The mountingof the cylinder upon the machine in inverted position also permits of the ready utilization of the customary flange :11, on the cylinder structure as a means of clamping the same to the supporting devices of the machine. I claim 1. The eombinatiom-in a cylinder boring machine, of an elevated supporting frame, a vertical boring spindle rotatably mounted in hearings on said frame and extending a boring head at the upper end of said spindle, means for mounting the cylinder structure in an inverted position on the upper end of the elevated supporting frame, and means located below the elevated supporting head for imparting to the boring spindle rotating movementand movement in the direction of its axis.

2. The combination, in a cylinder boring machine, of an elevated supporting frame, clamps on said frame for engaging a flange around the open lower end of the cylinder, and a vertically movable and rotating boring head mounted upon the upper end of a downwardly extending spindle, said spindle being disposed so as to travel upwardlybetween the clamps and enter the open end of the cylinder from below the same' 3. The combination, in a cylinder boring machine. of a boring spindle and its boring head, a frame in which said spindle is free to turn and to slide, radially adjustable supporting blocks against which the front face of a flange at the end of the cylinder is adapted to bear, and clamping devices radially adjustable on said supporting blocks and constructed to engage the back face of the flange at the end of the cylinder and-com fine said flangeto the supporting blocks.

4. The combination of the boring spindle, means for rotating the same, a feed screw axially disposed in respect to the boring spindle and rotating with the same, and means for imparting rotating movement to said feed screw independently of its rotating movement with the spindle, said means including a head rotating with the spindle, a spur wheel secured to the feed screw, a pinion carried by said head and meshingwith said spur wheel, a star wheel connected to said pinion, and one or more fixed pins for engaging said star wheel as the same is carried around with the rotating head.

'5. The combination of the boring spindle, afeed screw therefor, means for rotating the boring spindle, feed screw operating mechanism rotating with the boring spindle and havlngas an element a star wheel, and a plate carrying a pin for engaging said star wheel and having provision for changing the position of. said pin in respect to the axis of rotation of the star wheel whereby thedirection of rotation of the latter may be reversed.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing Witnesses.

; HOWARD A. PEDRICK.

Witnesses:

HAMILTON D. TUR ER, KATE A. BEADLE.

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