US1550257A - Machine for repairing scored engine cylinders - Google Patents

Description

Aug. 18, 1925.

c. HOPPER I MACHINE FOR REPAIRING SCORED ENGINE CYLINDERS Filed March 12. 1921 5 Sheets-Sheet be; h mm awnK INVENTOR Aug. 18,- 1925.

C. HOPPER MACHINE FOR REPAIR ING SCORED ENGINE CYLINDERS 5 She'ets4Sheet 2 Filed March 12, 1921 zaww Aug. 18, 1925. 1,550,257

C. HOPPER MACHINB FOR REPAIRING SCORED ENGINE CYLINDERS Filed March 12, 1921 5 Sheets-Sheet INVENTOR MACHINE FOR REPAIRING SGORED ENGINE CYLINDERS Filed March 12, 1921 5 Sheets-Sheet 4 INVENTOR Aug. 18, 1925. 1,550,257

I C. HOPPER MACHINE FOR REPAIRING SCORED ENGINE CYLINDERS Filed March 12, 1921 5 Sheets-Sheet 5 INVENTOR Patented Aug. 18, 1925.

issazri CHARLES HOPPER, DE LOS ANGELES, CALIFORNIA.

MACHINE FOR REPAIRING SCCRED ENGINE CYLINDERS.

Kpplication filed March, 12, 1 92].. Serial No. 451,758.

To all whom it may concern:

Be it known that 1, CHARLES Horrnn, a citizen of the United. States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented new and useful Improvements in a Machine for Repairing Scored Engine Cylinders, of which the following is a specification.

It is the object of this invention to provide a combined milling, planing and grinding machine for operating on the interior of cylindrical or tubular bodies and more particularly for forming channels on the inner walls of engine cylinders and the like, and for grinding and finishing inlays placed in the channels.

Another object of this invention is to provide a machine for facilitating the repair of scored cylinders of internal combustion engines, by means of which the scores may be cut out and dove-tailed channels formed for the reception of a metallic inlay and whereby the channels may be readily formed with i oppositely inclined countersunk grooves.

Another object is to provide a construction in a machine of the above character whereby either a milling, planing or grinding action may be performed on the interior of a cylinder as occasion may require, embodying means whereby the milling and grinding action may be effected by mechanical power and the planing by a manual power.

Another object is to provide means for supporting and centering an engine cylinder relative to the mechanism for operating thereon, and to provide various adjustments whereby the machine is adapted to operate on cylinders of various diameters and at various points within the cylinders.

Other objects will appear hereinafter.

The invention is illustrated in the accompanying drawings in which:

Figure 1 is a perspective view of the machine. I

Figure 2 is a detail in section and side elevation with portions broken away showing the application of the invention.

Figure 3 is a fragmentary view in end elevation, as seen on the line 3-'3 of Figure 2 and illustrating the engine supporting head.

Figure 4 is a detail horizontal section as seen on the line d d of Figure 2.

Figure 5 is a view in vertical section and elevation as seen on the line 5-5 of Figure 2.

Figure 6 is a view in vertical section and elevation as seen on line 6-6 of Figure 5.

Figure 7 is a detail in plan as seen on the line 77 of Figure 6.

figure 8 is a detall in vertlcal sectlon showing the detachable grinding head.

Figure 9 is a detail in section and perspective illustrating the manner of centering the engine cylinder by means of a chuclr.

Figures 10, 11 and 12 are details in perspective showing the manner of planing, milling and grinding the cylinder.

Figures 13 and 14 are details in section illustrating the manner of forming the channel.

Figure 15 is a sectional view showing the completed inlay.

In general the machine embodies means for adjustably supporting an engine cylinder or the like, a tool operating mechanism adapted to effect either ainilling, planing or grinding action on the interior of the cylinder and mounted 'for vertical, longitudinal, lateral, and radial adjustment relative to the cylinder to dispose atool in any desired position within the cylinder, and which tool operating mechanism is so designed that a tool may be rotated either axially, diametrically, or obliquely relative to the cylinder, and advanced lengthwise, circumferentially, or radially thereof.

More specifically indicates a base plate on which is mounted a standard 11 here shown as comprising a vertically disposed plate having a circular opening 12 adjacent to its upper end through which access may be had to the interior of an 'engiiie cylinder supported on the standard as will be presently described.

Mounted 011 the back of the standard is a turnable work-holding plate 13 having an opening formed with a marginal flange 14 adapted to extend into the opening 12. An annular rib on the plate extends into a channel on the back of the standard to increase the bearing of the plate.

For securing the work-holding plate against the standard in various positions, a series of bolts 16 are provided and arranged with their heads positioned to engage the shoulders of an annular T-channel 17 formed on the back of the plate as shown in Figure 2; the bolts being each provided with a nut 18 which when screwed on the bolts serve to clamp the plate on the standard. An opening 19 is formed in the plate which, when disposed opposite a bolt receiving opening in the standard, will permit insertion of the bolt.

As a means for securing an engine cylinder on the plate the outer face of the latter is formed with a series of parallel openended T-channels 20 at apted to receive the heads of bolts 21 extending through clamps 22 arranged to engage the flanges of an engine cylinder as indicated in dotted lines in Figure 2.

By providing the plate with a series of the channels 20 it is adapted to receive engine cylinders of various sizes which are designed to be supported on the plate with the open end of the cylinder disposed concentrically with the opening in the standard; the engine cylinder being centered by means of a chuck as will be later described.

After the engine cylinder has been secured to the plate the latter may be turned by loos ening the nuts 18 to dispose any desired portion of the engine cylinder lowermost.

Mounted on the front face of the standard 11 to have both swinging movement and vertical adjustment thereon is a bracket 28 which forms a support for the operating mechanism of the machine and embodies a leaf 24 secured to the standard by hinges 25 to afford swinging movement and which leaf carries a pair of guide channels 26 in which a slide member 27 is mounted for vertical adjustment.

The slide member carries a bed 28 arranged to project horizontally from the standard when the leaf 24 is closed thereagainst. A clamp latch 29 mounted on the standard is provided to engage the leaf 24 to hold the latter in its closed position.

Mounted on the bed is a longitudinally er:- tending shaft 30 the outer end of which projects beyond the end of the bed and is adapt ed to receive a removable hand crank (not shown) by which the shaft may be rotated. lhe inner end of the shaft is fitted with a beveled gear 31 which meshes with a gear 32 on a vertical shaft extending downwardly through a bearing on the slide member 27 and which shaft is formed with a worm 34 and is threaded through a block 35 fixed to the leaf 24: the worm 34 serving as a means to raise and lower the bed on rotation of the shaft 30.

A carriage 37 is slidably mounted on guide flanges 36 on the bed and is adapted to be advanced or retracted relative to the standard, and for this purpose a worm shaft 38 is mounted on and extends lengthwise of and parallel to the shaft 30; the outer end of the worm shaft extending beyond the end of the bed and adapted to be rotated by a hand crank. An internally threaded divided sleeve 39 mounted on the carriage engages the worm shaft 38 and is adapted to be moved in or out of engagement therewith; the members of the sleeve 39 being formed with upwardly projecting lugs 40 which engage slots 41 on a pivoted disk 42 mounted on the upper face of the carriage and provided with a handle 43 by which the disk may be turned to cause the divided members of the sleeve to move toward or away from each other and in and out of engagement with the worm shaft. When the sleeve is in engagement with the shaft, rotation of the latter will cause the carriage to move toward or away from the standard at comparatively slow speed.

li Ieans are provided for manually advancing and retracting the carriage at a speed greater than could easily be effected by the worm shaft which is here shown as comprisa lever 44 pivoted at 45 on the bed and ing its short arm connected to the short arm o a bell-crank lever 44 the long arm of which connects with the carriage by a link 46, By moving the threaded split sleeve eat of engagement with the threaded shaft and operating the lever 44 the carriage may be freely moved back and forth.

. ounted on the carriage 37 for lateral adius-z'ment thereon is a slide block 47 having a dove-tail channel slidably engaged by a dove-tail flange 48 on the carriage. The dove-tail flange is formed with a longitudinal channel 49 into which a threaded sleeve 50 on the block 47 projects; the threaded sleeve being engaged by a threaded shaft 51 mounted on the carriage and extending lengthwise of the channel 49., the outer end of the shaft 51 projects from the side of the carriage and is adapted to be engaged by a hand cranl'r whereby it may be rotated to advance or retract the block 47 laterally of the bed. A set screw 52 is provided in the block and adapted to engage a shim to securely hold the block against movement or vibration on the carriage.

Formed on the slide block 47 is an open ended cylinder 53 extending in the direction of the length of the bed and which cyl nder forms a bearing for a rotary hollow head 54 One end of the head is formed with an end wall 55 and has a flange 56 arranged to abut against the inner end of the cylinder, whilst the opposite end of the head is fitted with a demountable end-plate 57 arranged to abut against the opposite end of the cylinder. The edge of the end-plate 57 is formed with worm-teeth 58 which are engaged by a worm-pinion 59 mounted on a shaft 60 extending transversely of the bed and sup ported in bearings carried by the block 47. One end of the shaft 60 projects to one side of the block and is adapted to receive a hand crank by which it may be rotated manually to slowly turn the head and the opposite end of the shaft 60 is connected by a disengageable sleeve 60 to an electric motor 6] carried on the block 47 and which motor is provided for therpurpose of rotating the head at comparatively high speed. The ends 55 and 57 of the head are formed with vertically extending slots 62 and 63, and 8X- tending through the head and through the slots is a tubular tool carrying shank 64 which is designed to rotatewith the head and to be adjustable diametrically of the latter to vary its position relative to the axis of the head. For the purpose of adjusting the tubular shank in the head, a pair of threaded stud shafts 65 are screwed into bosses on the shank and are affixed to wormwheels 67 carried onthe interior of the head, and which worm-wheels mesh with wormpinions 68 on an adjustment shaft 69 carried by the head. The outer end of the shaft 69 projects forward of the end-plate 57 and is adapted to be rotated by a hand crank to effect movement of the shank radially of the head.

Extending lengthwise of the shank interiorly thereof and supported in ball-bearings therein, is a spindle 70, one end of which is connected through a flexible shaft 71 to a motor 72 by which the spindle may be rotated. The opposite end of the spindle is fitted with a pinion 78 which meshes with a pinion 74 fitted with a hub 75 mounted in a threaded plug 76 screwed in the under side of the shank. The pinion 7a is formed with a tubular end-thrust extension 77 adapted to bear against a threaded plug 78 screwed into the side of the shank opposite the plug 7 6.

Mounted within the pinion 74 is a tube 79, the lower end of which is formed with a split cone 80 opening in a tapered bore in the hub and adapted to grip the stem of a milling tool; the upper end of the tube being engaged by a threaded connection to a screw 81 extending through the plug 78 and adapted to be turned t advance or retract the tube 79 to cause the tube to be engaged with or disengaged from the milling tool. The outer end of the tubular shaft is fitted with a threaded plug 82 adapted to form a support for a shaper tool and which plug may he removed and replaced by a plug 83, particularly shown in Figure 8., and which plug constitutes a bearing for a shaft 84: carrying a grinding wheel 85 and fitted with a beveled pinion 86 adapted to mesh with the pinion 7 when the plug 83 is screwed into the end of the tubular shaft.

As a means for determining the normal central positions of the several adjustable parts and by means of which these parts may be reset to various known previous positions, a series of indicating devices are employed. For this purpose the outer face of the guide channel 26 is provided with graduations 87 and the bed is provided with a pointer 88; the pointerindicating a Zero graduation when the bed is so disposed that the tubular shaft will be positioned axially of the drum and of the opening 12 in the center. A guide flange 89 on the drum end plate is provided with graduations 90 and a pointer 91 is carried by the tubular shaft and registers with a zero gradnation when the tubular shaft is disposed axially of the drum. A pointer 92 on the block d7 co-operates with graduations on the carriage 87 to indicate the relative positions of the block and carriage and to denote when the tubular shaft is positioned on the vertical center of the opening 12. A pointer 98 on the cylinder 58 registers with graduations 94: on the flange 56 to designate the relative positions of the drum and its casing.

In the operation of the. invention, the engine cylinder isclamped to the face plate, as before described, and arranged with its aXis extending in alignment with the center of the opening 12; the cylinder being centered by means of a chuck 95, as shown in Figure 9. This chuck is fitted with expansion jaws 96 engageable with the margin of the cylinder opening and by which it may be engaged with cylinders of various diameters, and has a cylindrical body 97 which slidably fits the flanged opening in the work supporting plate. The chuck is employed in placing the cylinder in position, after which it is removed. When the cylinder is secured to the plate, the latter is then turned to position the scored portion of the engine cylinder lowermost whereupon the face plate rigidly clamped against the standard by the bolts 16 and nuts 18, as before described. 7

shown in Figure 10. The carriage 87 is then disengaged from the shaft and the lever L4. operated to advance the carriage 87. The cutting tool is then lowered into contact with the engine cylinder by rotating the shaft 69, whereupon the cutting action may be effected by longitudinal movement of the carriage by manually operating the lever 44, or the carriage may be advanced slowly by re-engaging the sleeve 39 with the shaft 38 and rotating the latter. if desired, the carriage may be advanced by the screw shaft 38 and retracted more speedily by operation of the hand lever,

lVhen it is desired to mill a dove-tail channel in the cylinder, the planer tool is removed and a straight milling tool afiixed to the stock in the pinion and driven from the motor 72.

In the milling operation the tool may be advanced longitudinally of the cylinder, either by rotation of the threaded shaft 38 or the hand lever 34. Lateral movement of the milling tool is effected by manually rotating the drum by turning the shaft 60 previously disconnected from the motor 61. n In milling the channel, the milling tool is advanced longitudinally of the cylinder in a vertical position and in alignment with the vertical center of the cylinder, as indicated in Figure 13. so as to form the channel with vertical side walls; a side cutting milling tool being employed. The initial cut will thus be formed to extend along the vertical center of the cylinder. On completing the length of the cut, the milling tool is advanced to either side of the channel previously formed where it is desired to form the channel of a width greater than the diameter of the milling tool. This lateral movement of the milling tool is effected by shifting the block 47 and the head thereon, during which movement the milling tool will remain in a vertical position. The milling tool is then again advanced lengthwise of the cylinder to widen the channel.

On completing the initial cut of the hannel whereby it is formed with side walls paralleling a radius of the cylinder. the milling tool is disposed at an angle and lowered to increase the depth of its cut. so to form the channel with an inclined side wall terminating in a groove at the juncture of a bottom and side wall of the channel, as shown in Figure 14:. The positioning of the milling tool at an inclination is effected by turning the head through the medium of the shaft 60. and lowering of the milling tool is effected by operating the adjustment shaft 69. he milling tool is obviously inclined in one direction when undercutting one side wall of the channel, and is inclined in the opposite direction when undercutting the other side thereof.

The completed channel will thus be formed with oppositely inclined side walls which are preferably formed at an inclination of about 10 degrees from the vertical, and the channel will have spaced grooves in its bottom wall whereby an inlay 99,

placed in the channel as shown in Figure 15, will be formed of increased thickness along its edges, thus reinforcing the inlay and securely anchoring it against displacement.

In forming the channel in the manner before described, the use of an undercutting milling tool is obviated as the channel may be formed by a straight side cutting tool.

Before placing the inlay in the channel, the bed is swung to one side to give access to the interior of the cylinder, the hinged mounting of the leaf 24 permitting ready movement of the mechanism to one side. The inlay may be put in place in any desired manner. whereupon the head is swung back, into position, and a grinding tool, such shown in Figure 8, is then attached to the end of the shaft 54, with the pinions 86 and '74: intermeshing. The head is then positioned in axial alignment with the engine cylinder. and the shank is adjusted on the head to dispose the grinding wheel in position to grind the inlay flush with the inner surface of the engine cylinder. The head may then be oscillated by means of the shart 60 to grind the inlay flush with the cylinder. hen it is desired to grind the interior of the cylinder throughout, the ssh 60 may be connected to the motor 61 and the head rotated so that the grinding wheel will traverse the inner wall of the engine cylinder circumferentially thereof; the grinding wheel being rotated on the tubular stem. by the motor 72 during this operation, and the grinding wheel advanced lengthwise of the cylinder at the same time by advancing the carriage, as before described.

By mounting the cylinder on the turnable plate opposite to and concentric with the openings in the plate and standard, the cylinder may be turned to dispose a score therein in any desired position relative to the tool, and by providing the various gage marks the position of the tool relative to the center of the cylinder may be readily adjusted, as occasion may require; each of the gage marks being provided with a zero mark, to which a pointer would indicate when the adjustable part would be in such position as to dispose the center of the head and shank in alignment with the center of the cylinder when the several adjustable parts are all in the Zero position.

This enables rapid adjustment of the parts to suit cylinders of various diameters.

In event it is desired to operate on the cylinders of an internal combustion engine without removing the engine from its mounting, the same may be effected by detaching the bed from the standard, and supporting it in any desired manner to position the tubular shaft vertically and in operative relation to the cylinder.

Whilst the invention has been specifically described, it is manifest that various changes may be made in the details of construction and the arrangement of parts without departing from the spirit and scope of the invention as set forth in the appended claims, and I, therefore, do not limit myself to the precise construction shown.

l/Vhat 1 do claim as my invention, and desire to secure by Letters Patent, is

1. In a machine of the character described, a rotary head, a shank projecting through said head and adapted to extend axially thereof, means for adjusting said shaft laterally in said head parallel to the axis thereof, screw means for adjusting said head vertically, screw means for adjusting said head laterally, and means for reciprocating said head longitudinally.

2.111 a machine of the character described, means for adjustably supporting a cylinder, a vertically adjust-able bed-frame, a carriage slidable longitudinally of said bed-frame, a rotary head on said carriage adjustable transversely thereof, a tool-supporting shank extending longitudinally through said head and adjustable diametrically therein parallel to the axis thereof.

3. In a machine of the character described, means for adjustably supporting a cylinder, a hinged and vertically adjustable bed-frame, a carriage slidable thereon, a block slidable transversely of the carriage, a rotary head on said block, a shank extending longitudinally of said head and adapted to extend axially thereof, and the means on said head for adjusting said shank diametrically of said head and maintaining it parallel with the axis of the latter.

t. In a machine of the character described, a bed-frame, a carriage slidable thereon, a screw means for advancing said carriage, means for disengaging said screw means, a lever operated means for advancing said carriage on release of said screw means and tool supporting and operating mechanism supported on said carriage.

In a machine of the character de scribed, a standard, a work supporting plate on said standard having an opening therein, means for supporting an engine cylinder on said plate with its open end disposed concentric with the opening in the plates, means whereby said plate may be rotated around an axis extending centrally through said opening, and means for clamping said plate to said standard.

6. In a machine of the character described, a standard, a work supporting plate thereon having an opening therein, means for attaching an engine cylinder on said plate with its open end extending axially of said opening, a bed-frame adjustable vertically on said standard beneath said opening, a rotary head mounted for lateral and longitudinal movement on said bed-frame, and a t0ol-supporting shank extending longitudinally through said head parallel with said bed-frame adapted to be adjusted diametrically of said rotary head.

7. In a machine of the character described, a bed-frame, a carriage slidab-le longitudinally thereof, a rotary head on said carriage adjustable transversely thereof, a tool-supporting shank extending longitudinally of said head, and slidable diametrically thereof, means for adjusting said shank to dispose it at various positions diametrically to the head and parallel to the axis thereof, a spindle carried by said shank, and means for rotating said spindle.

CHARLES HOPPER.

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