US882305A - Pipe-expanding apparatus. - Google Patents

Description

No. 882,305. PATENTPD MAP. 17, 190s.

c. PPLL. PIPA` EXPANDING APPARATUS.

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APPLICATION FILED GOTA, 1907.

WITNESSES Wmv/f No. 882,305. PATBNTBD MAR.`17,1908'.

C. PPLL. Y PIPE BXPANDING APPARATUS.

APPLIGATION FILED OCT-4, 190'1.

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UNTTED sTATEs PATENT oEEioE.

CHARLES FELL, OF LORAIN, OI'IIO, ASSIGNOR TO NATIONAL TUBE COMPANY, OF PITTSBURG, PENNSYLVANIA, A CORPORATION OF NEW JERSEY.

PIPE-EXPANDING APPARATUS.

Specification of Letters Patent.

Patented March 17, 1908.

Application filed October 4, 1907. Serial No. 395,914.

T o all whom t may concern:

Be it known that I, CHARLES FELL, of Lorain, Lorain county, Ohio, have invented a new and useful Pipe-Expanding Apparatus, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which Figure l is a view partly in side elevation and partly in vertical section of a machine embodying my invention; Fig. 2 isa detail plan view partly in section showing the expanding/head Fig. 3 is a vertical section on the line III-III of Fig. 2, Fig. 4 is an end view of the expander 5 and Fig. 5 is a detail view of one of the rounding-up blocks or Jaws.

4In the operation of rifling pipes or tubes, the rifling necessarily extends to the ends of the pipe or tube, and when these ends are to be threaded to receive a coupling it is necessary to rst expand them for the purpose of removing this rifling.

The object of my invention is to provide means of simple and ell'icient character by which. the rifling, or any other irregularities in the tube, etc., may be quickly and readily removed and the end portions of the pipe or tube expanded to true circular form.

My invention preferably consists of a device of this character in the form of an attachment which can be readily placed upon an ordinary pipe-tl'ircading machine, so that the operations of expanding and threading can be done by the same machine, the provision of the expanding attachment in' no way interfering with the operation of threading.

The precise nature of my invention will be best understood by reference to the accompanying drawings, which will now be described, it being premised, however, that various changes may be made in the details of construction and arrangement by those skilled in the art without departing from my invention as defined in the appended claims.

In these drawings, the numeral 2 designates the bed of an ordinary pipe-threading machine. 3 and 41 are the usual holding chucks, which are rotated by the train of gears 5 driven by the motor 6. 7 designates the threading head, which is mounted on the longitudinally movable carriage 8 actuated by the pinion 9, which engages the teeth of the rack l0. ll is the usual chuck or head in which the threading tools are carried, and which is mounted on the slide l2. These parts are all similar to those used on existing pipethreading machines, and need not be described in detail.

The expanding attachment which 'forms the subjectanatter of my invention consists of a series (three being shown in the present instance) of rollers 13. These rollers are of tapered or frusto-conical form, and are journaled between and upon plates or washers l4, which are arranged to slide in radial guides l5 in the support hereinafter described, around the opening 16 through which the pipes to be expanded pass. The rollers are shown as having openings 17 bored therethrough, into the end portions of which are loosely Vfitted bosses 1S on the plates or washers 14. The outer faces of these plates or washers are faced or planed at an angle of ninety degrees to the longitudinal axis of the machine, as shown, while the inner faces of these plates which bear against the ends of the rollers are at an angle to their outer faces whereby the axes of such rollers are brought at an angle to the axis of the pipe to be expanded, while the tapered surfaces or said rollers at the outer sides thereof are parallel with such axis.

19 is a truste-conical wedge or expander, which is tapered to the same angle as the rollers 13, but in the reverse direction, so that as it is moved forwardly between the rollers, the latter will be moved away .from the center. This wedge or expander is counterbored at its large end as shown at 20 to receive the head 2l. of the actuating screw 22, which has a threaded bearing in a nut 23 seated in the supporting block This screw is actuated by a hand wheel 24. The head of the screw 2l is secured in the counterbore 20 of the wedge or expander by a retaining plate 25, which is secured to and rotates with the expander. The head 21 has a pointed or conical center 26, which has a bearing within the expander for the purpose of reducing the friction. The nut 23 is set into a counterbore in the body 23, and is held by the retaining plate 27 secured by screws 2S, or other suitable means. When the hand wheel 24 is actuated the screw 22 which is held `from turning by a spline or feather 22a, will be moved forward to thereby ywith the entire expanding head, can be force forward the wedge or expander 19, to cause the rollers 13 to move out, or away from, the center line of the head.

The pipe or tube A, whose end is to be expanded is secured in the chuck 3, or in both the chucks 3 and 4 if it is of sufi'i cient length, with its free end passing through the threading chuck 11 and between the rollers 13 and the rounding-up jaws or blocks 29, the latter being seated in the head 7, and the upper of said blocks having a holding-down screw 30. As the pipe or tube is rotated while the tapered rollers 13 are being moved forward by the action of the screw 22, the outer faces of said rollers will expand the said pipe or tube in a direction parallel with its axis. The contact between these rollers and the inner surface of the pipe or tube will cause the rollers to rotate, and these in turn rotate the wedge or expander 19. A roller be-aring effect is thus produced which extends very greatly the life of the tool.

23b is a cap which is fastened to the body 237 and which forms the end bearing or slide for the rear plates or washers 14. 31 designates a cap which is rotatably secured to the body 23a by a stud or screw 33, whose end runs in a circular groove in said body. This collar acts as a gage for the expanding head as the latter enters the pipe or tubes, and as it extends beyond the face of the slots in said body in which the front washers 14 are seated, it also acts as a guard to prevent said washers and the rollers from falling out of place. The body 23?L is held in the frame 34 by the pivoting screws 35. T hese screws permit the entire expanding head to swing in a horizontal plane so that it can adjust itself when being put in or taken out of a pipe or tube. The frame 34 is hinged at 34a to a bracket 36, which is fastened to the carriage 8. The free end of the carriage is normally secured in the operative position shown in Fig. 2 by a removable coupling pin 37. By removing this pin, the frame 34, together swung backwardly out of the way, the movement of the head on the pivoting screws 35 permitting the head to be moved so as to pass out of the opening 16. the expanding attachment-may be moved entirely out of the operators way during the other necessary operations on the end of the p lfllhe expanding head can be adjusted back and forth by means of the screws 33, which bite against the nuts 39 of the pivoting screws 35.

The rounding-up blocks or dies 29 are shaped so as to fit closely to the outside diameter of the pipe, so that the rollers 13 cannot expand the pipe beyond its proper size.

In this manner The advantages of my invention result from the provision of the means described l whereby rifling or other irregularities may be eectually removed from the ends of pipes or tubes, and a true diameter given thereto for a length necessary for the cutting of threads thereon. Also from the provision of means of Athis character which can be used in the form of an attachment to a pipe-threading machine in such a manner that the pi e may be expanded and the thread cut t ereon without removing the pipe from the machine, the expanding attachment being capable of being moved out of the way of the threading tools in the manner described.

1 claim 1. The combination with a pipe-threading machine, having a threading carriage and head, of an expanding tool pivotally attached to the carriage and arranged to be swung out of the way of the threading operations, said head having a series of radially movable expanding rollers 5 substantially as described.

rlhe combination with a pipe-threading machine having a threading carriage and head, of an expanding tool pivotally attached to said carriage and arranged to be swung out of the way of the threading operations; substantially as described.

3. The combination with a pipe-threading machine having a threading carriage and chuck, the said carriage having an opening therein through which the pipes are passed, a head adapted to enter the said opening and within the end portion of a pipe, a series of tapered radially movable expanding rollers seated in said head, an expanding member for forcing the series of rollers simultaneously outward, and a gage collar carried by said head, said collar also acting as a guard for the said rollers, substantially as described.

4. 1n a pipe-threading and expanding machine, a threading carriage, a frame hinged thereto, and an expanding tool pivoted in said frame; substantially as described.

5, 1n a pipe-threading and expanding machine, a threading carriage, a frame hinged thereto,I an expanding tool pivoted in said frame, and means for adjusting the tool longitudinally in the frame; substantially as described.

6. In a pipe-expanding and threading machine, a threading carriage, a frame hinged thereto, and an expanding tool pivoted in said frame, said tool consisting of a head having a plurality of radially movable expanding rollers seated therein, and means for forcing said rollers simultaneously outward, substantially as described.

1n testimony whereof, 1 have hereunto set my hand.

CHRLES FELL.

Witnesses D. L. JENKINS, J. S. CRAIG.

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