US1746346A - Machine for boring out core sand from the bells of cast-iron pipes - Google Patents

Description

Feb. 11, 1930. D. GILES 1,746,346 v v MACHINE FOR BORING-OUT CORE S ANP FROM THE BELLS OF CAST IRON PIPES V Filed May 12. 192s 2 Sheet-Sheet 1 INVENTOR r 0/: W0 5 E 3 YM .9

Feb. 11,1930;

I MACHINE FOR BORING-OUT CORE SAND FROM THE BELLS OF CAST IRON PIPES Filed May 12v, 1928 2 Sheets Sheet 2 I ATTORNEY Patented Feb; 11, 1930 nm'r ansmrss PATENT OFFICE.

DAVID: GILES, or CHATTANOOGA, TENNEssEE, ASSIGNOR To UNITED sTATEs CAST IRON PIPE & FOUNDRY COMPANY, or BURLINGTON, NEW JERSEY, A CORPORATION OF NEW JERSEY MACHINE FOR BORING OUT CORE SAND FROM THE BELLS OF CAST-IRON PIPES .A pplication filed May 12, 1928. Serial No. 277,232.

My invention relates to mechanism for boring out the core sand which adheres to the bell end of acast iron pipe after the casting of the pipe. Myinvention has especial reference to centrifugally cast pipe in which the only adhering core sand is that left in the bell ofthe pipe though, of course, it is capable of use in connection with pipes, however cast. The object of my invention is to provide a machine for boring out the core sand which will permit of the rapid handling of the pipes while at the same time provide for the correct alignment and secure holding of the pipe in registry with the bor ing bar.

The nature of my improvements will be best understood as described in connection with the drawings in which I have illustrated a machine embodying my improvements and in which Figure 1 is a plan view of my machine, partly sectioned to show a detail of construction.

Figure 2 is a side elevation of the machine showing a pipe in position with its bell end shown in section. f

Figure 3 is an elevation, taken as on the line 3-3 of Fig. 2.

Figure 4 is a side elevation of the mechanism for transporting the pipes into registry with the boring mechanism, showlng also my port indicated at A The support A carries on its overhanging arm cylinder B and is formed with a guide-way indicated at B in which is longitudinally movable the squared sleeve D which forms a bearing D for the boring bar and is provided on its under side with a rack indicated at D This rack is engaged by a trunnion E on the shaft E which is supported in the hearing D and is turned in either direction by the attached lever arms indicated at E F is a boring bar supported at its rear end in the bearing C in the upright A and supporting the boring head F at its other end. As shown, the portion F of the boring bar which extends through the sleeve Dis somewhat less in diameter than the rest of the bar and, as shown also, I provide collars f at each end of this reduced portion to form a firm abutment for the sleeve D. The boring tools indicated at Gr are convenientlysecured in the boringhead, as indicatedi-n Fig. 7. The

boring bar F is rotated in any convenient way, as shown by gearing indicated at II and H I is a cylinder secured on the base A in alignment with the boring bar; I a piston moving'in the'cylinder having a piston rod I which extends through the head of the cylinder and supports a block J which is formed in longitudinal grooves indicated at J and with threaded portions J 2 at the ends of the groove. In these grooves I locate the chuck bars indicated at K which are formed in V shapedrows K the edges of which are toothed or roughened as indicated. These chuck bars are aligned in the head J by means of the screws indicated at J screwing into the threaded portions J at theends of the grooves. The alignment of the chucks is such, of course, as to bring the pipes supported thereon into proper registry with the boring head. L, L, are ro'ds secured to the head J extending down through flanges of the cylinder head and having nuts L screwing on their lower ends which, by coming in contact with the flanges of the cylinder head arrest the upward motion of the chuck.

M is a cylinder supported 'on the overhanging end of the frame part A M is a piston moving in this cylinderhaving a piston M to the end of which is secured the clamping head N, having preferably a toothed surface, as indicated, and located immediately above the chuck; O, O, are sup ports for the tracks 0 0 provided for the support and transportation of the pipes and O, O, are stops illustrated as slight projections from the tops of the tracks 0 located opposite to each other, one on each track and so positioned as to rest a pipe in approximate registry with the boring head. P 1s a shaft supported in brackets P P, attached to the rails 0 0 having secured to it the lever arms indicated at P P and also to lever arm P". Q, is a cylinder; Q a piston moving in the cylinder and having a piston rod Q which is connected by a link Q, with a lever arm P. R indicates a pipe having a bell end R The 0 eration of the described machine is readily Followed. Pipes R are deposited on the tracks 0 and, one by one, rolled forward into contact with the stops 0 thereby coming into approximate registry with the boring bar. They are brought to an accurate registr by means of the chucks K which are lifted y the cylinder and piston I, I and which performs the double function of lifting the pipe, if necessary, to proper registry position and b reason of the V form of the chucks, proper y aligning it with the boring bar. The elevation of the chucks is determined by the stop mechanism provided, to wit, the adjustable nuts L on the rods L. After the elevation of the chuck, the gripping head N is brought down uponthe top of the pipe by the action of the cylinder and piston M firmly gripping the pipe between the head and chuck. The operator then, by means of the lever arms E rotates the shaft E so that the pinion E acting'on the rack D will carry the sleeve D, and the boring bar held in it, forward so that the boring outlets G will ream out the bell end of the pipe. As soon as this is accomplished, the shaft D is rotated in the opposite direction, retracting the boring bar. The gripping head and chuck are retracted, leaving the pipe free upon the tracks 0 and the operator then, by means of the cylinder and piston Q, Q, and the described mechanism rotates the shaft P, moving the lever arm P P from its position of rest, as indicated in Fig. 4, to the position indicated in Fig. 5, the shape of the lever arm being such that its portion P when the lever is rocked upward, rotates the pipe to an inclined surfaceso that it will, by its own weight, roll down upon the portion of the track in the rear of the steps 0 Having now described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. A machine for boring outthe core sand from the bells of cast iron pipes comprising in combination a reciprocatable boring bar, a vertically movable chuck for supporting and aligning a pipe in registry with the boring bar, means for shifting said chuck having adjustable stop mechanism for arresting the u ward movement of the chuck in predetermined position, a retractable clamping head arranged to co-act with the chuck to hold a pipe in registry with the boring bar and means for advancing and retracting said head.

2. A machine having the features of claim 1, having in combination therewith pipe supporting tracks for feeding pipes into registry with the chuck and clamping head and stops for arresting pipes rolling over said tracks in approximate registry.

3. A machine having the features of claim 1, having in combination therewith pipe supporting tracks for feeding pipes into registry with the chuck and clamping head, stops for arresting pipes rolling over said tracks in approximate registry and means for lifting the pipes over the stops.

4. A machine having the features of claim 1, having in combination therewith pipe supporting tracks for feeding pipes into registry with the chuck and clamping head, stops for arresting pipes rolling over said tracks in approximate registry and means for lifting the pipes over the stops consisting of lifting levers pivoted below the tracks and adapted to form an inclined support for the pipes when turned upward.

DAVID GILES.

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