US1747723A - Tube expander and flarer - Google Patents

Description

Feb. 18,1930. 5, R, MAUPlN 1,747,723

TUBE EXPANDER AND FLARER Filed Aug. 6. 1928 2 Sheets-Sheet, 2

patented Feb. 18, 1930 UNITED STATES PATENT OFFICE I GRAVES B. MA'UPIN, or MOB RLY, MISSOURI, Ass'reno'n To man J. FAESSLER MANU- FACTURING COMPANY, or IVI-OBERLY, MISSOURI, A COPARTNERSHIP COMPOSED or ELIZABETH FAESSLER, CHR-ISTINIA raEssLER, LoUIs E. FAESSLER, AND GRAVES R. MAUIIN Application filed August 6, 1928.

My invention relates to improvements in tube expanders and flarers, and has for its primary object a tube expander and flarer which is provided with separate flaring and expanding rollers, all of the rollers, however, being operated simultaneously and by a single mandrel.

A further object is to construct a tube expander and flarer in which certain of the rollers will roll and expand a cylindrical surface, and the other rollers cause the end of the tube or sleeve to be flared outwardly.

A still further object is to construct a tube expander and flarer in which both the cage containing the rollers and the mandrel will feed longitudinally and automatically.

A still further objectis to construct a tube expander and flarer in which the mandrel is so arranged that the rollers can move completely into the cage.

In the drawings: 7

Fig. 1 is a side elevation of my device;

2 is an end view of the same;

Fig. 3 is a longitudinal section taken on the line 33 of F lg, 2 showing the mandrel and rollers in elevation expanding and flaring a sleeve;

F 1g. 1 1s a fragmental view of the mandrel showing the portion which is adapted to re-' ceive the flaringrollers when in collapsed position; i

Fig. ,5 is a section taken on the line 5-5 of Fig. 1;

Fig. 6 is a section taken on the line 6 6 of Fig. 1; v

Fig. 7 is a longitudinal section of the cage showing the rollers in collapsed position and i section of amodifled' form of my structure.

In the construction-of my device I employ acage 12 which is-provid'ed onits forward end with a projecting sleeve 13. The sleeve- Serial No. 297,800.

and ca e have extendin therethroiwh a lonb b b git-udinal bore 14:.

Formed in the side of the cage are a plurality of radially extending openings 15, in which the expanding rollers are located. The outer edges of the openings 15 are turned over as indicated by the numeral 16 so as to prevent the rollers from passing entirely therethrough.

To the rear of the openings 15 are openings 17. These are preferably located diametrically opposite each other and not only extend outward, but also incline forward on their outer ends. This is clearly illustrated in Figs. 3 and 7 Located in certain of the openings are expanding rollers 18. These rollersare relatively short and do not extend to the openings 17. Between certain of the rollers 18 are placed expanding rollers 19. These rollers are longer than the rollers 18 and extend rearwardly a sufiicient distance so as to overlap the forward edge of the flaring rollers 20. This is for the purpose of preventing a bead or ridge being rolled on the inside ofacted on at all.

Extending longitudinally through the cage is mandrel which is provided on its forward end with an angular surface 21 for the engagement with a wrench or other implement for rotating the mandrel. To the rear of this angular portion is an enlarged cylindrical portion 22 which has extending therethrough a pin 23. This pin is longer than the diameter of the cylindrical portion so that its projecting ends can enter slots 24 which are formed in the sleeve 13 and which are diametrically opposite each other.

To the rear of the cylindrical portion 22 is a tapering portion 24 which tapers down till it meets the cylindrical portion 25. Part of the cylindrical portion 25 is cut away so as to leave flat faces 26. These faces are for the purpose of receiving the flaring rollers 20 when in collapsed position. See Fig. 7.

-mandrel in one cl1rect1on the mandrel will be To the rear of the flat faces 26 is a gradually tapering portion 27 which constitutes the working part of the mandrel. The end of the mandrel is provided with a reduced cylindrical portion 28 on which is loosely mounted a collar or washer 29. This collar or washer is held in position by means of a cotter-key or pin30. The purpose of the washer is to pre vent the mandrel from being pulled entirely through the cage.

It will be noted the rollers 18 and 19 are slightly tapered so that they will be incontact with the tapered portion of the mandrel 27 throughout their length and still present a horizonal face on the outside of the cage so that a cylindrical surface can be rolled.

The openings 17 are also so arranged that the longitudinal axes of the rollers 18 and 19 will be at a slight angle to the longitudinal axis of the mandrel. In this way by rotating the automatically drawn forward forcing the rollers 18 and 19 outward. 5 And simultaneously with this movement the flaring rollers 20 will also be forced outward. But their movement in addition to being outward will be forward, so that they will move outward at an angle less than 90 to the mandrel axis thereby causing the sleeve or end of the tube to be flared.

In Fig. 3 I have shown my device as flaring and expanding a sleeve. It will be noted in this view that the portion 31 of the sleeve is expanded and rolled cylindrically, while the portion 32 is being acted on by the rollers 20 and flared.

In the device shown in Figs. 1 to 7 inclusive, the flare on the sleeve is placed on the inside of the boiler, and for this reason it is necessary that all of the rollers recede or are collapsed into the cage so that the cage can be introduced through the sleeve sufiiciently. far to permit the rollers 20 to commence operation. This is done by pushing the mandrel intothe sleeve so that the ends of the pin 23 enter the slots 24, as in Fig. 7. When in this position the rollers 18 and 19 rest on the cylindrical portion 25 of the mandrel, while the flaring rollers 20 rest on the surfaces 26. This position is assured by the reason that the pin 23 must enter the slots 24 before the then pulled bodily toward the operator.

rollers 20 can collapse, and in order for this pin to enter the slots, the mandrel must be so turned as to present the flat or supporting surfaces 26 to the rollers 20.

After the rollers have been thus receded or thus collapsed, the cage is inserted through the sleeve which has previously been placed in position in the crown sheet, arch or water The mandrel is This causes the rollers 20 to ride up on the inclined faces 34 at the rear of the supporting surfaces 26 and come in contact with the tapered portion of the mandrel, and this forces the rollleg 33, as the case may be.

ers 2O outward causing them to project beyond the cage.

A continued forward pull of the mandrel now causes the tapered portion 27 to engage with the expanding rollers 18 and 19. The forward pull on the mandrel is continued, and at the same'time it is causing the rollers 18 and 19 to rotate and also be forced outward radially until they come in contact with the sleeve. This is continued until sufiicient friction is set up to make the hand turning extremely difficult. Then an implement, such as a wrench, motor or the like, is attached to the angular portion 21 and the mandrel rotated thereby.

The rotation of the mandrel now causes the rollers 18 and 19 to draw the mandrel farther into the cage and expand the rollers 18 and 19. This movement is occasioned by the arrangement of the axes of the rollers 18 and 19 tothe axis of the mandrel, and not alone does the mandrel feed inward or toward the operator, but the cage also has a tendency to move in that direction drawing the rollers 20 against the end of the sleeve or tube. Further rotation causes these rollers to move out radially and forwardly flaring the end of the sleeve or tube, as indicated by the numeral 32 in Fig. 3.

After the sleeve or tube has been properly flared and seated, the rotation of the mandrel is reversed. This feeds the mandrel backward so as to release the excessive pressure on the rollers 18, '19 and 20. The mandrel can then be pushed inward by hand until it again assumes the position indicated in Fig. 7, after which the entire cage can be readily withdrawn.

In Fig. 11 I have showed a modified form of structure in which the cage 35 is provided with rollers 36 and 37, similar to the rollers 18 and 19, and with rollers 38 corresponding to the rollers20. In this instance, however, the forward end of theinandrel is provided with a cylindrical projection 39 on which is loosely mounted a washer 40, this washer being held by means of apin 41. To the rear of the washer 40 is provided an integral collar 42. This collar is integral with the mandrel and prevents the washer from moving away from the pin. To the rear of the collar 42 is a cylindrical portion 43 which is of predetermined length. i

To the rear of the cylindrical portion is a portion 44 which is rather abruptly tapered, and to the rear of this abruptly tapered portion 44 is a gradually tapered portion 45, which constitutes the working portion of the mandrel. This tapered portion again terminates in a cylindrical portion 46 to therear of which is another cylindrical portion 47 The diameter of the last-mentioned cylindrical portion is larger than the bore 48 which extends longitudinally through the cage 35 and limits the movement of the 1 ,141, was

mandrel through the cage in one direction, the washer 40 preventing movement in the opposite direction.

The cylindrical portion 47 is provided near its rear end with openings 49 arranged at right angles to each other for the insert-ion of a bar to permit the turning of the mandrel. And to the rear of the cylindrical portion 47 is a portion 50 of the same shape as the portion 21 which is for the purpose of engagement with a wrench or other device for rotating the mandrel.

In this device when it is desired to cause the rollers 36, 37 and 38 to collapse into the cage, the mandrel is pulled out until these rollers come to rest on the cylindrical portion 43. The cage is then inserted in the tube or sleeve and the mandrel pushed forward, the abrupt taper causing these rollers to move out rapidly and ride up on the working taper 45 of the mandrel. The mandrel is then rotated in the usual manner, which causes it to feed longitudinally through the cage in the same manner as the mandrel disclosed in Fig. 1, with this exception,that instead of moving toward the operator when expanding these various rollers, the mandrel moves away from the operator. Thereafter the rotation of this device is the same as previously described.

My device is intended especially for use in locomotive work, although it can also be used to advantage on stationary boilers, and is more especially directed towards securing tubes and sleeves in what is known as watertube boilers. This type of boiler is coming into extensive use on the railroads throughout the country.

This device is an improvement on an application for tube expanders and flarers, filed by me April 5, 1928, Serial No. 267,527.

Having fully described my invention, what I claim is:

1. A tube expander and flarer comprising a cage, a tapered mandrel extending. therethrough and capable of longitudinalmovement therein, a plurality of rollers carried by said cage, said rollers contacting with said mandrel and adapted to be projected radially beyond the periphery of said cage, certain of said rollers being of greater length than the remainder of said rollers, a plurality of tapered flaring rollers carried by said cage in equally spaced circumferential relation to each other and between the longer rollers,

said rollers contacting with said mandrel and adapted to be moved outward and forwardly thereby whereby a tube is expanded and has its ends flared simultaneously, reduced portions formed on said mandrel for permitting said rollers to recede into said cage, and means carried by one endof said mandrel for receiving a rotating means whereby said mandrel, rollers and cage can be rotated simultaneously.

2. A tube expander and flarer comprising a" cage, a sleeve projecting from said cage, a

ridges, said rollers contacting with saidmandrel' and adapted to be moved outward and forwardly thereby whereby a tube isexpanded and has its ends flared simultaneously, means integral with said mandrel for permitting saidrollers to passinto said cage a predetermined distance, and means on one end of said mandrel for receiving a rotating means whereby said mandrel, rollers and cage can be rotated simultaneously.

3 Atube expanderandflarer comprising a cage circular in cross-section and having a cylindrical bore. extending longitudinally therethrough, circumferentially spaced openings formed through the wall of said cage adjacent its rear end, saidopenings inclining forwardly, radially extending openings formed insaid cage and extending longitudinally thereof, certain of said openings having their rear endsextending rearward of the forwarcledge of the inclined openingslocated between t-he'longer openings, flaring rollersl'ocated in said inclined openings, a plurality of expanding. rollers. mounted in the radially extendingiopenings, a tapered mandrel? extendingthrough saidzcage andcapable of longitudinalmovement therethrough for simultaneously. projecting; all of said rollers beyondtheperiphery of said cage,zsaid mandrel'being provided atone" end with means for receiving; a rotating. means so that said cage, rollers and: mandrel can .be. rotated simultaneously, and reduced portions formed on said mandrel, intermediate its ends, whereby said rollers EIIBTPQIIHlttGClItO pass into the cage while removing or. inserting the cage in the tube.

4:- A tube expander and flarer comprising a cage, a sleeve carried thereby, expanding rollers carried by said cage and adapted to have their peripheries projected beyond the periphery of the cage, the longitudinal axis of said rollers being at an angle to the longitudinal axis of said cage, a mandrel having a tapered portion intermediate its ends and movable centrally through said cage and adapted to contact with said rollers for causexpanding rollers, said flaring rollers adapted to be contacted withby said mandrel and moved outward and forward simultaneously by said mandrel.

5. A tube expander and flarer comprising a cage, a sleeve carried thereby, expanding rollers certain of which are of greater length than the remainder carried by said cage and adapted to have ther peripheries projected be yond the periphery of the cage, the longitudinal axis of said rollers being at an angle to the longitudinal axis of said cage, a mandrel having tapered portions movable centrally through said cage and adapted to contact with said rollers for causing said projection of the rollers, separate flaring rollers carried by said cage said flaring rollers extending beyond the longer rollers, said flaring rollers adapted to be contacted with by said mandrel and moved outward at an angle less than degrees to the longitudinal axis of said cage by said mandrel, means carried by the ends of said mandrel for preventing its removal from the cage, and, means integral with said mandrel permitting the expanding and flaring rollers to move into said cage.

6. A tube expander and flarer comprising a cage, a sleeve carried thereby, expanding rollers of different lengths carried by said cage and adapted to have their peripheries projected beyond the periphery of the cage, the longitudinal axis of said rollers being at an angle to the longitudinal axis of said cage, a mandrel having a tapered portion movable centrally through said cage and adapted to contact with said rollers for causing said projection of the rollers, separate flaring rollers carried by said cage, said flaring rollers having their forward edges extending in advance of the rear edges of the longer expanding rollers adapted to be contacted with by said mandrel and moved outward and forward simultaneously by said mandrel, means carried by the ends of said mandrel for preventing its removal from the cage, and means formed on said mandrel for permitting the expanding and flaring rollers to move into said cage.

In testimony whereof I aifix my signature.

GRAVES R. MAUPIN.

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