US1813152A - Machine for forming openings in piping - Google Patents

Description

y 1931- w. L. ENGHAUSER MACHINE FOR FORMING OPENINGS IN PIPING Filed Feb. 20. 1929 5 Sheets-Sheet l lNVEINTOR 'A'i'TORNEYI July 7, 1931- w. L. ENGHAUSER MACHINE FOR FORMING OPENINGS IN PIPING Filed Feb. 20. 1929 5 Sheets-Sheet 2 wanna WM WM ATORNEYS July 7, 1931. w. L. ENGHAUSER 1,313,152

MACHINE FOR FORMING OPENINGS IN PIPING Filed Feb. 20 1929 5 Sheets-Sheet MW NHMWN 4 d n. n i \m mvvllllffirllllflfllllll v ii.

INVENTOR ATTORNEY July 7, 1931. w. 1.. ENGHAUSER MACHINE FOR FORMING OPENINGS IN PIPING Filed Feb. 20, 1929 5 Sheets-Sheet 4 July 7, 1931. w. ENGHAUSER MACHINE FOR FORMING OPENINGS IN PIPING Filed Feb. 20. 1929 5 Sheets-Sheet 5 \NVENTOR ATTORNEYj Patented July 7, 1931 UNITED STATES WINFORD L. ENGHAUSER, OF CINCINNATI, OHIO MAGHINE FOR FORMING OPENINGS IN PIPING Application filed February 20, 1929. Serial No. 841,467.

This invention relates to an improved method of forming apertures or ta holes in manifolds for gas stoves and the li e, and to a machine for supporting the pipe and performing the steps of the method at a plurality of points on a manifold, as wel as performing the steps of the method simultaneously on manifolds progressing through the machine.

In the formation of these manifolds, standard gas pipe is used which has a relatively thin wall, and fittings are screw-threaded into the walls of the pipe. The connections of the fittings to the manifold must be gas-tight, and for this reason it is desirable to have the openings through the wall of considerable length for greater bearing and increased threading. The normal thickness of the wall of the piping is insuflicient for the formation of the necessary number of threads for a positively rigid connection of the nipple and a gas-tight joint.

It is, therefore, an ob'ect of this invention to provide a method of orming the tap holes a of increased dimension over the normal wall thickness for increased hearing or number of threads.

The tap holes of this invention are formed by means ofa spinning tool which is inserted through the wall of the piping, and immediaiely upon contact therewith heats the met- :11 to a. high heat and spins the same partly toward the interior and partly toward the exterior of the manifold. The wall of the piping is not depressed by this method and a smooth integral sleeve-like portion or inwardly and outwardly bossed opening is provided, the rotating tool being reciprocated into the work after the manner of a drill, with sufficient speed to prevent any damage to the tool due to the heat.

In using this method it has been found de sirable to initially drill the wall of the manifold prior to insertion of the spinning tool,

r this aiding in the centering of the tool and lessening the possibility of damage to the tool due to the length of the operation, it also being found that, with the hole drilled of a sufficient diameter to leave enough metal to be forced outwardly by the spinning tool,

flanges or bosses of the properlength and thickness may be formed. The initial drillmg may or may not be performed, depending upon the hardness of the pipe and the form of aperture desired.

This invention therefore provides an improved method of forming tap holes in manifolds, consisting of traversing the wall of the piping with a spinning tool rotating at high speed, heati g the wall of the piping due to the friction and because of the resultant softened state of-the metal, permitting the metal to be spun and formed into a sleevelike portion of considerable length, and as an additional step in the method, to initially drill the Wall of the piping to provide a spinning tool centering opening, and means for governing the amount of metal formed in the flanges for the bosses. It is furthermore provided that the ends of the bosses are approximately squared, this resulting because the spining action displaces more metal on the transverse exterior edges than on the lpingitudinal, and vice versa on the interior e es.

nother object of this invention is to pro- Vide a machine for performing the steps of the method herein outlined, which machine is contrallable to drill a given manifold at predetermined points along the length of said manifold, and which, without removal of the manifold from the machine, permits the same to be subjected to the action of a reciprocating spinning tool, the spinning tool acting upon the manifold at the same points as the drill and controlled by the same means, and to further provide that the drilling operations may be performed on one manifold as the spinning operations are being performed on another manifold, these manifolds as they are clamped in the machine being successively moved from position for operation thereon by the drill to a corresponding position relative to the spinning too-1 and a blank manifold inserted each time in the drilling side of the machine.

Another object relates to the construction of the work support for receiving the manifolds and to its mounting for reciprocation relative to the opposing tools, and for rotation to present a drilled manifold to the spining position, this view also illustrating the clutch mechanism for imparting a single revolution to the cams and single reciprocations to the slides.

Figure 5 is a sectional View taken on line 5, Figure 2, illustrating the spinning tool spindle and slide, showing the spinning tool traversing the pipe wall, and the cam means for actuating the same.

Figure 6 is a fragmentary sectional view taken longitudinally of the tool' support and its slide block, illustrating the work support moved to the limit of inward movement, and illustrating the latch means for locking the work support against rotation.

Figure 7 is a sectional view taken on line 7-7, Figure 6, but illustrating the work support retracted to the fullest extent, and showing the means for locking the same against rotation withdrawn just prior to upsetting the work support.

Figure 8 is a side elevation of an extension element of the work support for handling longer manifolds.

Figure 9 is a sectional view taken longitudinally and horizontally of one of the arms of the work support, illustrating the extension piece and an abutment plate thereon for operating the worl; support latch.

Figure 10 is a perspective view of the abut ment plate.

Figure 11 is a sectional view taken on line Ill-1l, Figure 2, illustrating the clutch tripping and cycle controlling mechanism.

Figure 12 is a longitudinal section of a manifold having openings or taps formed therein by means of the method and machine of the present invention.

Figure 13 is an enlarged sectional view taken on line 1313, Figure 12, detailing the opening or tap.

Figure 14 is a sectional view taken similar to Figure 13, but showing the hole tapped.

machine of the present invention, in general, comprises, a pair of slides each having a spindle mounted therein, the spindles of each slide being independently driven, one thereof carrying a drill. and the other a spinning tool, and the tools opposing. A work support is slidably and rotatably mounted for sliding movement transversely between the tools, and rotatable to perform successive operations on a pair of manifolds mounted therein at opposite sides by relating :1 respective manifold first to the drill and then to the spinning tool, the purpose as herebefore described being to produce by an improved machine and method a series of inwardly and outwardly bosscd apertures or trap holes in the manifold. The respective tool carrying slides are brought toward each other si multaneously by means of a clutch controlled cam shaft.

The tools, therefore, act simultaneously to drill one manifold and to spin the opening in the advanced or upset manifold. A templet bar is provided for cooperation with a lever on the work support to control the sliding thereof and to uniformly space the apertures in each manifold and to accurately align the same for the spinning operation.

Referring to the drawings and describing the machine in detail, the pedestal or frame thereof is indicated at 15. A pair of parallel spaced longitudinally disposed angle iron pieces 16 form the table support for the machine, and the table thereof is formed of a heavy plate 17 disposed within an oil pan 18 of greater area than the plate, providing an oil trough around the plate, the table thus formed being secured to the angle iron frame pieces by means of screws.

A. cam carrying shaft 19 is mounted on the angle iron pieces longitudinally of the machine in bearings 20, one on each end of the angle iron pieces. Adjacent the inner side of each bearing 20, a cam 21 is secured to the shaft, these cams facing inwardly and actuating the drill carrying slide 22 and the spinning tool carrying slide The slides are mounted in slide blocks 2 lsocured on the plate toward the respective ends there 5'. The shaft 19 passes loosely through the blocks and is maintained against longitudinal displacement in its bearings by means of a "J of collars 25 at one end of the shaft, disposed one at each side of a bearing.

A drive shaft 26 for rotating the cam carrying shaft 19 is mounted transversely to and below the cam shaft at one end of the machine, being journalled in the downwardly extending flanges of the angle iron elements of the frame. This transverse power shaft has a pulley 27 secured on its outer end driven by means of a belt 28, and has a worm 29 Se cured thereon between the flanges of the angle iron pieces, this worm being in mesh with a worm wheel 30 loosely mounted on the cam shaft between the cam 21 and the bearing 20 of the shaft.

The worm wheel is drivingly connected to the cam shaft by means of a toothed clutch sleeve 31 slidably and non-rotatively mounted on said shaft between the cam and the toothed hub of the worm wheel. The clutch element is splined to the shaft for a positive rotative connection therewith and longitudinal clutching movement thereon. Gompression springs 34 are provided between the cam and the clutch sleeve, these springs seating in recesses 35 is the respective faces between which they are disposed.v

As shown in Figure 11, a control device is provided for maintaining the spring actuated clutch sleeve normally out of engagement with the worm wheel. This device comprises a bar 36 mounted transversely of the shaft,

being pivotally connected on one of the angle 1ron pieces and held upwardly against a U- shaped stop 38 on the other angle iron by means of a weight 39 hung on the end of a cable 40 attached to the swinging end of the-bar and disposed over a pulley 41 hung from the ceiling. The weight normally holds the pivoted bar in its limit of upward movement, and in this position a roller 42 mounted on the upper face of the bar is in engagement with a cam segment 43 secured to the periphery of the clutch sleeve toward the cam.

The pivoted bar is drawn out of engagement with the cam segment by means of a treadle 44 connected to the outer end of the bar by a rod 45. Depression of the treadle releases the clutch sleeve and allows the compression springs to move the clutch collar into engagement with the worm wheel where-' by the cam shaft is driven. The operator causes a full revolution of the shaft to take place by merely tripping the treadle, allowing the control bar to be drawn back into upper position, whereupon the inclined surface of the cam segment engages the roller, and the clutch collar is withdrawn from the worm wheel and the power cut off at the same point of roller engagement on the cam at which it was thrown in. This cycle of movement imparts reciprocation simultaneously to p the tool slides.

The drill spindle 46 and slide 22, and the spinning tool spindle 47 and slide 23 are similar in construction and will only be described independently with respect to their differences The slides 22, 23, are cast in U form with the arms of the U extending upw'ardly and the respective spindles 46, 47, mounted between and in the arms. The spin dles are independently driven by means of pulleys 48 secured to the spindles between the arms of the slide and are each maintained against longitudinal displacement by means of plates 49 secured to each end face of the slide and against the ends of the Spindle.

Each spindle has a chuck 50 mounted on a stud extension thereof, this extension protruding through a respective retaining plate 49. The chuck is secured on the extension by means of a set screw 51, and the drill 46 or spinning tool 47 a is maintained in the chuck by means of a'pair of set screws 5252. The intermediate portion of the drill is supported in a bracket 46 passing through a hardened bushing therein and the bracket secured to the work support slide block.

The operative connection between each slide and its respective cam is of the following nature: A yoke-headed screw 53 is screwed into the outer end face of the slide, the yoke end'carrying a roller 54 in engagement with the cam face, and the screw maintained in set position by means of a lock nut 55. The

by means of coiled tension springs 56 attached to clips 57 secured to the inner end wall of the slide and secured to a respective slide block section 58, there being a spring at each side of each slide.

A work slide block 59 having its slide faces disposed transversely to the tools is secured to the plate of the table. The work support 60 is of U-sha-pe and the arms thereof straddle the slide block 59 and are disposed .vithin respective slide bearing grooves 61 at each side thereof. The work support is additionally slidably mounted on a rod 62 secured within the end face of the slide block atone end, and mounted on a standard 63 at the other end. The work support 60 is designed to carry a pair of manifolds shown at 64, one on each side face thereof, and is rotatable for subjecting the respective manifolds to suecessive drilling and spinning operations from alternate sides without removal from the suport.

The manifolds 64 are clamped between wedgebars 65 longitudinally of the work support, the wedge bars being disposed within longitudinal grooves 66 in the side faces of the support. The wedge bars are designed to force the manifold inwardly against the base of the grooves, the lower of the bars being secured in definite position in the groove, and the upper floating.

The upper bar isnormally held against the upperwall of the groove so as to present an open jaw for the speedy reception of a manifold. This is accomplished by means of screws 67 screwed into the wedge bar and passing loosely through the support with compression springs 68 disposed between the screw heads and the top of the support. This movable bar is clamped against the work by means of a Wing-headed screw 69 screwed into the support and bearing against the top surface of the bar.

The manifold in this instance as presented to the machine has an elbow 7 O at one end, and this elbow is the means for longitudinally setting the manifolds in the support.

As illustrated in Figures 1 and 2, the

grooves in the side of the support are provided with shoulders 71 toward the outer ends thereof, and the inner edges of the elbows abut these shoulders. When there is no elbow on the piping a stop (not shown) is used to longitudinally set the same. 5y means of this clan'iping arrangement and relation of the work support, each manifold is moved transversely of the end of the drill and securely held during the drilling operation.

A series of apertures 72 is formed in each manifold (see Figure 12), the manifolds being successively fed into the machine, and

a manually controlled feed arrangement for locating these apertures is provided of the following nature: A templet bar 73 is mounted parallel with the work support in about the same plane as the manifold, this bar being bolted to the upstanding arms of a bracket 74 secured to the table. The upper edge of the templet is notched at intervals as at 75, the spacing of the notching c-orresymnding to the desired spacing of the tap holes in the manifold.

The outer end of the work support 60 has a hub 76 extending therefrom, and a collar 7 7 is loosely rotatably mounted on the hub and maintained against outward displacement therefrom by means of a disk or washer 78 secured to the end face of the hub and engaging in a concentric groove in the outer face of the collar. A handle 79 is bolted to the outer face of the collar and lies across the face of the washer to prevent inward displacement of the washer. This handle is adapted to extend horizontally and to rest on the templet bar for engagement in any one of the series of grooves, the rear edge of the grooves being inclined and the forward edge sharp so as to provide a positive abutment of the handle when dropped into the groove on inward movement of the work support and to permit the handle to slide easily out of the groove on reverse movement of the work support. A right angled extension 80 is provided on the handle as a secondary handle hold for the operator.

A support bar 80 is mounted on the opposite side of the rod 62 parallel with and on the same plane as the templet, being secured at one end to a bracket on the table and atthe other on a standard 80". This bar is for the purpose of supporting the handles 79, 80, when thrown back from the tcmplet.

It is provided that during all drilling and spinning operations the work support is in sliding engagement with its slide block. However, when all the apertures have been drilled in a given manifold, the work support is upset and the drilled holes are presented to the spinning tool for bossing the same. This rotation of the work support is accomplished by withdrawing the support entirely 'from engagement with the slide block and rotating it'on the support rod 62.

A means for limiting the outward movement of the work support and for positivel rotatively positioning the same to place the manifolds in a plane with the tools is fully disclosed in Figures 6 and 7. As shown in Figure 6, inward movement of the work support is limited by means of a collar 81 pinned to the support rod. As shown in Figure 7. this same collar limits outward movement of the work support and provides for a yieldable contact of the support therewith. The support rod is secured to the slide block by means of an elongated set screw 82, and the abutment collar is therefore in definite relation to the slide block.

A latch 83 is slidably mounted on the support rod between the collar and the end face of the slide block, this plate having a sleeve or hub extension 84 disposed within a large bore in the face of the block and provides a pair of apertures 85 traversed by studs 85 having rounded ends extending from the end face of the block. A spring 86 is provided surrounding the support rod between this plate and the collar for normally holding the plate in engagement over the screws. The plate is of the same width as the space between arms of the support, and the support is therefore attached thereto for rotation.

As a means for withdrawing the plate from engagement with the pins or screws extending from the slide, abutment plates 87 are secured to the extreme ends of the side faces of the work support, there being lugs 88 extending inwardly from these plates engaging in grooves 89 in the rear face of the plate. These grooves or recesses engage the laterally disposed edges of the lugs so that as the work support is slid outwardly on the rod the lugs engage the plate and draw it outwardly, compressing the spring and relieving the shock when the support is drawn back suddenly.

l Vhen the plate has been withdrawn from the pins, the work support is free to rotate, whereupon the positions of the respective apertures of the plate are reversed as to top and bottom. Another manifold is inserted in the drill side of the support and the drilling and spinning operations are performed sin'iultaneously on the respective manifolds and at corresponding points.

As a. further means for stabilizing the work support, the lugs of the plate attached thereto engage in longitudinal grooves 90 formed in the slide grooves of the work support slide block. The work support is made extensible by means of sections 91 attachable to its outer ends as shown in Figures 8 and 9.

An oil pump is provided for supplying oil to the drill at the point of the drilling operation. This pump is driven by means of a belt 92 extending between a pulley 93 on the main lid drive shaft and a pulley 94 mounted on the shaft of the pump 95, the pump secured on a bracket 96 attached to the pedestal of the frame. The intake pipe 97 the pump ex- :ends down into an oil reservoir or tank 98 on the floor, and the discharge pipe 99 of the pump extends upwardly and is secured to v the table,with the nozzle end thereof immediately above the drill. The oil which is sprayed over the drill drains into thetank forming a part of the table and is conveyed back to the reservoir by gravity through a return pipe 100.

The operation of the machine and the method of forming tap openin s in a manifold will be apparent from the foregoing description. A manifold is initially placed in the drill side of the work support and is secured therein by means of the previously de cribed clamp. The operator having placed the desired templet on the bracket to govern the spacing and location of the taps, proceeds to manually move the work support slide through the successive notches of the templet, .ripping the clutch upon positioning the control lever in each notch, whereupon the drill spindle is reciprocated in single cycle movements of the cam shaft, and drilled holes are formed at the required intervals.

The work support is then withdrawn completely from engagement with its slide block and the latching means 83 is operated to release the work support, and it is thereupon rotated or upset to dispose the drill manifold 20 the spinning side of the machine, being thereupon latched by releasing the same, allowing the latch element 83 to engage the studs 85 in reverse position. The operator hen places another manifold in the drill side f the machine,- the machine then being properly primed and simultaneous spinning and drilling operations are performed upon the respective manifolds.

Inasmuch as the manifolds are secured in :orresponding positions in the Work support exactly opposite, the same control for spacing the drill holes is used for positioning the manifold for the spinning operations, and the tripping of the clutch causes both the drilling tool and the spinning tool to act on the respective pieces of Work.

As disclosed in Figures 4 and 5, the spinning tool has a rounded end 102 formed thereon and the tool is the diameter of the tap opening desired. The rounded end 102 of the spinning tool aids in the centering of the tool as it engages the drilled hole. It also permits the back spinning of the metal in the formation of an outer flange. There is .lisplacement of moremetal along the transverse edges of the opening on the exterior of the pipe than on the longitudinal edges, while the opposite is true onthe interior of the pipe. This is due to the curvature of the pipe on these respective sides. The result threaded (see Figure 14) and a considerable is that the ends of the sleeves are approximately squared, this being of advantage in starting the threading.

The spinning tool eing rotated at a high rate of speed, the engagement thereof with the wall of a drill hole causes the metal to heat up rapidly, and the metal is easily spun or spread along the tool into the form of the bosses herein described. The approach of the spinning tool up to the manifold is very rapid due to the shape of its operating cam but the speed. of traverse is slower to permit the metal to heat up. The tool is of highly hardened steel and is withdrawn from the heated portion of the manifold before it can be damaged or stick therein. p

As shown'in Figure 5, the spinning tool traverses the wall and forms a straight opening having sleeve-like characteristics and of exceedingly greater length than the normal 35 wall thickness of the manifold piping. After the manifolds are taken from the machine (see Figure the tap openings are screwthread bearing is provided.

Having described my invention, I claim:

, 1. A machine of the class described, comprising, a pair of reciprocable spindles, means for rotating said spindles, means for simultaneously reciprocating said spindles, a drill and a spinning tool mounted in the respective opposing ends of the spindles, a work support mounted for sliding movement between and transverse to said tools and axially supported for rotative movement, and 1 means for securing the work in the respectively opposite sides of said support for simultaneous drilling and spinning operations on the oppositely disposed pieces of work.

2. A machine of the class described, com- 105 prising, a pair of reciprocably mounted spindles, means for rotating said spindles, tools mounted in the respective opposing ends of said spindles, means for simultaneously reciprocating said spindles toward each other, a work support slidably mounted transverse to and. between said tools,means for securing pieces of workin the opposite sides of the support, a templet bar disposed relative to said slidable work support, and a laterally extending control lever on said work support for stop engagement with said templetto definitely and successively present points of the work to the tools.

3. A machine of the class described, comprising, a reciprocably mounted spindle, means for rotating said spindle, a tool mounted in said spindle, a work support slidably mounted transverse to said tool, a stationary temp-let bar disposedlongitudinally relative 12 to said slidable work support, and a laterallyextending swinging control lever on said work support for stop engagement with said templet to definitely and successively present points of the'work to the tool.

4. A machine of the class described, com prising, a spindle mounted for reciprocation, means for rotating said spindle, a tool secured in said spindle, a slide block transrersely mounted relative to said tools, a work support disposed for sliding engagement in said block, anaxial mounting for said support extending from one end of the block, a atching means between said slide and block for aligning and securing said work support on its axis relative to said slide, and means for mounting a work piece in the side face of said work support adjacent said tool.

5. A machine of the class described, com- )rising, a pair of spindles mounted for reciprocation, means for rotating said spindle, tools secured in the respective opposing ends of said spindles, means for simultaneously eciprocating the spindles toward each other, L slide block transversely mounted between said tools, a work support disposed for sliding engagement in said block, an axial mounting for said work support extending from one end of the block, a latching means between :aid slide and block for securing said work support in alignment to said slide, and means for mounting work pieces in the respective side faces of said work support whereby simultaneous tool operations may be performed on these work pieces and the work support rotated to reverse the positions of the work pieces relative to the tools upon retraction from engagement with said block or progressive operations on the work.

6. In a device of the class described, a pair of spindles mounted for reciprocation toward each other, means for rotating said spindles,

tools mounted in the opposing ends of said pindles, means for simultaneously recipro- 'ating said spindles, a slide block mounted transverse to and between said opposing spindles, a support rod extending from one end of said slide block, a work support xially mounted on said rod and alignable .vith said slide block, a latch between said Work support and said slide block, said latch unlatched by disengagement of said work support from said slide block for permitting "otation of the work support, and means for mounting respective pieces of work in the opposing sides of said work support, said latch having a latching connection with said slide block for aligning said work support iherewith.

7. A machine of the class described, comprising, a pair of reciprocably mounted spindles, means for driving said spindles, means for simultaneously reciprocating the zpindles of the pair toward each other, tools mounted in the respectively opposing ends of the spindles, a work support mounted for sliding and axial movement between and transverse to said tools, and means for securing the work in the respectively opposite sides of said support for simultaneous operations on the oppositely disposed pieces of work.

8. A machine of the class described, comprising, a reciprocably mounted spindle, means for rotating said spindle, a tool mounted in said spindle, awork support slidably mounted transverse to said tool, a stationary templet bar mounted relative to said slidable work support, and a lever on said work support disposed to definitely enga e the templet bar at successive points for lociing the work support in successive positions relative to the tool.

9. In a device of the class described, spindles mounted for reciprocation toward each other, means for rotating said spindles, tools mounted in the opposing ends of said spindles, means for simultaneously reciprocating said spindles, a slide support extending transversely between-the tools, a work support rotatably and slidably mounted on said slide support, latch means between said work support and said slide support for maintaining the work support against rotative movement, and means for mounting respective pieces of work in the opposing sides of said work support.

10. In a machine of the class described, spindles mounted for reciprocation toward each other, means for rotating said spindles, tools mounted in the opposing ends of said spindles, means for reciprocating said spindles, a work support disposed transversely between the tools, said work support slidably and rotatably mounted, a stationary templet banadjacent said work support, a lever rotatably mounted on the axis of rotation of the work support and adapted to engage the templet bar, and means on the templet bar for stopping the lever at various selective positions for fixing the work sup, port in definite successive relations to the tools.

In witness whereof, I hereunto subscribe my name.

WINFORD L. ENGHAUSER.

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