US1746462A

US1746462A - Electric weld remover

Info

Publication number: US1746462A
Application number: US286329A
Authority: US
Inventors: Rhea R Cravens
Original assignee: Individual
Current assignee: Individual
Priority date: 1928-06-18
Filing date: 1928-06-18
Publication date: 1930-02-11
Anticipated expiration: 1947-02-11

Description

Feb. 11, 1930. R. R. CRAVENS v I 1,746,462

ELECTRIC WELD REMOVER Filed J ne' 18, 1928 5 Sheets-Sheet 1 Inventor Feb. 11, 1930. I R. R. CRAVENS ELECTRIC WELD REMOVER I Filed June 18, 1928 3 Sheets-Sheet 2 I f n'ven'tar Rhea R.C'1-avc=ns Feb. 11, 1930. R. R. CRAVENS ELECTRIC WELD REMOVER 5 Sheets-Sheet s Filed June 18, 1928 v Inventor Rhea Rl-Crdvens Patented Feb. 11, 1930 RI-IEA R. CltAiVENS, OF BIG SPRING, TEXAS ELiao'rnro WELD nnivrovnn Application filed June 18, 1928.

The present invention relates to an improved deviceto be hereinafter known as an electric weld remover,, and it has more particular reference to a structure employed for 5 removing the consolidated weld deposits from boiler tube beads which have become loose and leaky-and need rewelding. r c

YBriefly, the structure embodies an especially cast or made body-constituting a mounting to fora plurality of adjustable cutters, and a series of freely rotatable guides and antifriction. elements. This body is provided with a coupling adapted to telescopically fit into a driving chuck and -it;is bored for passage for atapered roller adjusting spindle.

The noveltylis predicated upon the eflicient organization of the parts which cooperates inperrnittingthe device to fulfill the requirement of a device of this class, in a dependable 29 and positive manner.

Figure 5 is a longitudinal sectional view .throughFigure 1, showing the internal association .of partsmo're plainly. v c Figure 16'is a cross section taken approximately upon the plane of the line 6-6 of Figure 5, looking in the direction of the arrows. h

Figure 7 .is an end View of Figure 1, looking in afdirection from left to right. a Figures. is across section on the line 8-8 of F igure, 5. i

IFigure9 is a groupperspective view of the .cutterlcarrying body. a

Figure 10 is anenlarged view, taken on the linel10-10 of Figure 5.

Serial No. 286,329.

. Figure 11 is a perspective View of a retaining ring.

Referring now to the drawings by reference numerals, it will be observed that 12 designates generally the improved cutter and roller carrier oribody. As before intimated, it is in the form of a casting 18, including a substantially disc like part having a forwardly projecting centering neck 14, onthe endof which is a retaining washer 15. As shown in Figure 11, this washer is provided with small holes 16 for passage of the retainingbolt 17 and is provided with elongated slots 18, at its circumferentially spaced points, for adjustable reception of the journals on the ends of the internal guide rollers 19. In cidentally these rollers fit withinthc tube and are disposed in rolling contact with the interior of the tube. The part 13is formed at the inner end of the neck 14 with an annular groove having a bevelled flange 20 for confining a cutter retaining spring 21. This spring is of the endless coiled type and engages the cutting element 22, as showniplainly in Figure 5. These cutting elements are mounted in notches in the periphery of the body 13, as is evident from Figure 9. Cooperating with the cutters are grooved anti-friction and guide rollers 23, having their stem portions 24: extending through radial jholes in the body. Incidentally the body is longitudinally bored and these stems extend into the bore as shown in Figure 5.

Cooperating with the grooved rollers 23 are the aforesaid rollers 19. Both sets'of rollers are adjusted for extensive action pr0- duced \bythe presence of the longitudinally slidable tapered spindle or wedge pin 25.

Clhispin has a head on its inner end as at 26, and the head cooperates with a pressure spring 27, located within the tool holder or socket 28. This socket is provided with the customary driving shank 29 to be operatively associated with an air motor or the like. It will be noted that the polygonal end extension 30 of a disc 31 fits telescopically in the Pocket 28. This disc is bolted tothe body 13, and carries adjustable bolts 32, for the cutter 22.

As before intimated the device is employed for chipping and scraping oil the consolidated metal deposits or electric weld from around the bead of a boiler tube. Hence, it is obvious that the neck 14 of the carrier 12 is inserted into the tube, whereby the rollers 19 come into contact with the inner surface of the tube. The grooved rollers 23 engage the head on the outer end of the tube. Then, when the device is set into rotation by appropriate means, the cutters act on the metallic deposit and scrape it ofli cleanly, and leave a true surface for rewelding. It is evident that the spring pressed wedge pin 25 comes into adjusting engagement with the

rollers

19 and 23, adapting them to the particular diameter of the tube being acted on, so that the cutters 22 resting upon the rollers 23 are also adjustably afiected, whereby the cutters may be adjusted with respect to the diameter of the tube being acted upon.

Itis thought that by considering the description in connection with the drawing, a clearunderstanding of the'invention will be had. Therefore a more lengthy description is regarded unnecessary.

Minor changes in the shape, size and rearrangement of parts may be resorted to, within the invention as set forth in the accompanying claims.

I claim:

1. An electric Weld remover comprising a body having a circumferential groove, and a centralized projection to fit telescopically within a boiler tube, a set of anti-friction rollers carried by said projection for engagement with the inner bore of the tube, a second set of anti-friction rollers carried by said body and adapted to engage the head of the boiler tube, said second set of anti-friction rollers having their axes at right an des to the axes of the first mentioned set 0? antifriction rollers, cutters mounted on said body and arranged within said groove, inoperative relation to said second set of anti-fr ction rollers, and a spring arranged in said groove and bearing against said cutters for urging said cutters into engagement with the last referred to series of anti-friction rollers.

2. An electric weld remover comprising a centrally bored cutter carrier, a plurality of cutters adjustably mounted on said carrier, an annular series of anti-friction rollers ,mounted on said carrier and having portions thereof disposed in the bore of said carrier, said rollers adapted to engage the inner bore of a boiler tube, means for mounting said rollers on said carrier for radial adjustment with respect to said carrier, a second series of grooved anti-frict on rollers mounted on said carrier and having their axes at right angles to the axes of the first mentioned rollers, said grooved rollers adapted to engage the bead of the bo ler ube, said last mentioned rollers embodying adjusting stems extending through openings in said carrier into the bore of said carrier, and a spring pressed tapered wedge pin extending through the bore of said carrier for engagement with said stems, and with the first mentioned rollers simultaneously to accommodate the tube acted upon, and the stems at their outer ends adapted'to contact with said cutters for effecting an adjustment of said cutters simultaneously with the outward radial movement of all of said rollers.

3. A weld remover for tubes, comprising a carrier including a circular body having peripheral notches and an endless groove, said body being centrally bored and formed with a centralized pilot extension for entering the tube, an annular series of anti-friction rollers carried on said extension, means for mounting said rollers on said extension for radial movement with respect to said extension for engagement with the inner bore of the tube, a series of grooved anti-friction rollers having their axes at right angles to the axes of the first mentioned rollers Whereby said last mentioned rollers may engage the bead of the tube, said grooved anti-friction rollers including stems extending slidably through openings in said body, the inner ends of the stems being controlled intermediate the first mentioned rollers, cutters mounted 1n said notches, an annular coil spring in said groove for yieldably urging sa d cutters into engagement with the outer ends of said stems, and a spring pressed wedge pin movable longitudinally in the bore of said body for engagement with the first mentioned rollers and the inner ends of said stems whereby all of said rollers andsaid cutters may be simultaneously adjusted" to accommodate the tube.

4. A weld remover for tubes, comprising a carrier including a circular body having peripheral notches and an endless groove, sa d body being centrally bored and formed with a centralized pilot extension for entering the tube, an annular series of anti-friction rollers carried on said extension, means for mounting said rollers on said extension for radial movement with respect to said extension for engagement with the inner bore of the tube, a series of grooved anti-friction rollers having their axes at right angles to the axes of the first mentioned rollers whereby said last mentioned rollers may engage the head of the tube, said grooved anti-friction rollers including stems extending slidably through openings in said body, the inner ends of the stems being controlled intermediate the first mentioned rollers, cutters mounted in said notches, an annular coil spring in said groove for yieldably urging said cutters into engagement with the outer ends of said stems, and a spring pressed wedge pin movable longitudinally in the bore of said body for engagement with the first mentioned rollers