US856896A - Tube expanding and beading tool. - Google Patents

Description

No. 856,896. PATENTED JUNE l1, 1907.

W. MUOORMICK. 'AF TUBE EXPANDING AND BEADING TOOL.

APPLICATION FILED 00T.19.1906.

im I y somewhat nearer the tube sheet.

WASHINGTON MCOORMICK, OF HILLYARD, WASHINGTON.

TUBE EXPANDING AND BEADING TOOL.

Specification of Letters Patent.

Patented June 11, 1907.

Application filed October 19, 1906. Serial No. 339,649.

.To @ZZ whom, it 'ln/ty concern:

Be it known that I, WAsInNGToN McCon- MIOK, a` citizen of the United States, and a resident of Hillyard, in the county of Spokane and State of Vasliington, have invented a new and Improved Tube Expanding and Beading Tool, of which the following is a full, clear, and exact description.

This invention relates to means for expanding and beading the tubes of boilers into the tube sheet, and more particularly to cer- -tain improvements in the tube-expanding and beading tool described and claimed in United States Patent-No. 818,843, granted to me April 24, 1906.

The object of this invention is to provide means whereby the pin may be constructed of greater 'strength and the beading tool more centrally arranged to eliminate the jarring effect when in operation.

A further object of the invention is to provide means whereby the tool may be more readily controlled while in operation, and whereby it may be more firmly held by the operator.

The invention consists in the novel features and parts and combination of the same, which will be more fully described hereinafter and then pointed out in the claims.

Reference is to be had to the accompanying drawings forming apart of this specification, in which similar characters of reference indieate'corresponding parts in all the figures, in which Figure 1 is a longitudinal section of the expanding tool applied for expanding the tube in the tube sheet and for forming inner and outer beads Fig. 2 is a transverse section on the line 2-2 of Fig. l, Fig. 3 is a transverse section on the line 3-3 of Fig. 1; and Fig. 4 is a longitudinal section of the bead finishing tool as applied.

The cylindrical body portion 1 of my improved tool is substantially the same as that disclosed in my prior patent save that a plurality, preferably two, slots 2 are provided longitudinally of the body portion, whereby a plurality of expanding and beading tools maybe simultaneously employed. The tools 3 are substantially the same as those disclosed in my patent, although they are preferably somewhat shorter at their outer ends and the elastic band or ring 4 is brought The inner edge 5 of each of the tools 3 is curved in the are of a circle, and the corresponding grooves within the mandrel are similarly curved to fit the inner edge of the beading tools 3.

The outer end of the body portion 1 is provided with a hollow cylindrical flange 6 having a plurality of milled beads 7 surrounding the same, whereby the operator may more firmly grasp the tool and more readily turn it when in operation. The outer edge of this flange is provided with a plurality of slots or notches 8, whereby a wrench or other suitable apparatus inay be inserted for turning the tool as the tube is being expanded.

In using the tool the parts are assembled in the relationship shown in Fig. 1, and the operator grasps the milled flange 6 in one hand while applying a hammer to the outer end of the mandrel 9. The annular bead 10 on the body portion 1 forces the inner portion of the tube outward into the form of a bead 11, while the shoulder 12 bends over the end 13 of the tube against the tube sheet 111 and the ring or gasket 15, all in the manner described in my previous patent. The work is accomplished twice as fast due to the use of a plurality of beading tools, and as the tube is being expanded or beaded at two different points at the same time, it is evident that the work is done more evenly and a much more smooth and finished appearance given to the ond of the tube. The curved inner edge 5 of the beading tool fitting in the curved groove in the mandrel 9 causes a smoother and evener contact at this point, and the jarring and rattling previously produced is entirely eliminated. The tool is rotated as it is used and the milled flange 6 readily permits of this turning without the aid of any outside means, although a tool of any suitable character may be inserted in the slots 8 should the parts become wedged in position. Vhen the bead 11 has been perfectly formed and the end 13 of the tube turned over against the tube sheet, another tool 16 is inserted in place of each of the beading and expanding tools 3, and by means of the flange 17 on said tools, the end 13 of the tube is more perfectly rounded and given a more finished appearance.

`he bottoms of the recesses in the mandrel in which the expanding and beading tools are inserted are preferably inclined as shown in Fig. 1, although they may, if desired, be arranged parallel to the axis of the mandrel and terminating at a shoulder, as shown in Fig. 4. Preferably, the mandrel in connection with which the expanding tool is used IOO lIO

is as shown in Fig. l, while the mandrel in connection with which the iinishing tool is used is formed as shown in Fig. 4, although either form of slot may be used in connection with either type of tool.

By reason of the improvements above described, I can obtain a much better iinish than is possible with the device described in my previous patent and am able to more perfectly control the tool when in use. The tool is of much greater strength and is less liable to become broken, all of which tends to the production of better results.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

l. A tube-expanding and beading device, comprising an integral body formed in two diameters and having a central bore and a plurality of slots extending lengthwise and leading to said bore, a mandrel fitting said bore and formed with a plurality of longitudinal recesses having inclined bottom portions curved in cross section and registering with the slots of the body, and a plurality of expanding and beading tools fitting the said slots and said' recesses, and having curved inner edges.

2. A tube-expanding and beading device, comprising an integral body formed in two diameters and having a central bore, a slot extending lengthwise and leading to said bore, a mandrel Jfitting said bore and formed with a longitudinal recess having an inclined bottom portion curvedvin cross section and registering with the slot of the body, and an expanding and beading tool fitting the said slot and said recess and having a curved inner edge.

8. A tube-expanding and beading device, comprising an integral body formed in two diameters and having a central bore and a plurality of slots extending lengthwise and leading to the said bore, a mandrel iitting the said bore and formed with a plurality of longitudinal recesses, each having an inclined bottom portion curved in cross section and each registering with a slot of the body, a plurality of expanding and beading tools fitting the said slots and said recesses and having curved inner edges, and an elastic ring tting an annular groove in said body and a groove in each of said tools.

In testimony whereoi I have signed my name to this speciiication in the presence of two subscribing witnesses.

WASHINGTON MGCORMICK.

Witnesses:

E. MGINTYRE, IWI. I. TUKELL.

Images