US2085710A - Pipe beading tool - Google Patents

Description

June 29, 1937. N. A. TORNBLOM ET AL 2,035,710

PIPE BEADING TOOL Filed Aug. 26, 1935 2 Sheets-Sheet l N. A. TORNBLOM ET AL 2,085,710

June 29, 1937.

' PIPE BEADING TOOL Filed Aug. 26, 1935 2 Sheets-Sheet 2 "Z? 2 60/01" m aiw a 5 Patented June 29, 1937 PATENT OFFIQE PIPE READING TOOL Nils A. Tornblom and Eric Bylund. Chicago, 11.,

assignors to Appleton Electric Company, a corporation of Kllinois Application August 26, 1935, Serial No. 37,883

11 Glaims.

The'obje ct of the present invention is to produce a simple and novel tool for pressing an annular bead in the wall of a tube of ductile material, usually metal,

The various features of novelty whereby our invention is characterized will hereinafter be pointed out with particularly in the claims; but, for a full understanding of our invention and of its objects and advantages, reference may be had 1 to the following detailed description taken in connection with the accompanying drawings wherein:

Figure 1 is a rear elevation of a tool embodying the present invention, a tube being shown in position in the same; Fig. 2 is a side view of the lower end of the tool, with the pipe shown in end elevation; Fig. 3 is a view similar to Fig. 2 showing the opposite side from that appearing in Fig. 2, the upper or handle part of the tool being shown in section; Fig. 4 is an end or bottom View of the tool; and Fig. 5 is a section on line 55 of Fig. 3, showing only the parts that appear in the plane of the section. 7

Referring to the drawings, I represents a C- shaped headwhose two arms 2 and 3 are straight and parallel. .On the upper side of the lower arm 2 is mounted a short roller 4 which projects upwardly beyond the bearing ears .5 and 6. Extending through the arm 3, and at right angles thereto, is a sturdy bar or slide 1 on the lower end of which is a jaw or fork 8. Mounted between the arms, 9 and ill, of this jaw or fork is a long roller H having an annular peripheral groove 12 which registers with the roller 4. In other words, when the bar or slide 1 is dropped ,down until the rollers engage with each other, thelower roller is engaged in the groove in the upper roller. In using the device the roller II is first retracted sufiiciently to permit the tube that is to be beaded to be slipped over the arm 2 of the head. Then, when the roller ii and its carrier are moved down, the end sections of the roller ll come in contact with the outer surface of 45.the tube on opposite sides. of a short stretch "which is restingon the roller 4 and which spans the groove l2: Further downward pressure on the roller H will cause the metal of the tube to yield and bend, At first there will be produced a slight dent. Thereupon, if the tube be held stationary and the tool be swung around the same, this indention will be progressively carried around the entire circumference to the starting point. Therefore, what was originally a slight indent, viewed from the inside of the tube, and a slight bulge as viewed from the outsidahas become a rudimentary annular bead or rib as viewed from the outside and a shallow annular trough as viewed from the inside. By swinging the tool around the tube a number of times, and gradually forcing the rollers together, the metal of the tube is caused to be drawn into the shape of a substantial annular bead whose external contour is determined by the shape of the groove G2 in the roller H and the shape of the trough in which depends upon the contour of the peripheral portion of the roller 4.

Attached to the arm 3 of the head and projecting at right angles therefrom, is a handle l3 by which swinging movements are given to the I tool. Also, as will hereinafter be explained, the turning of this handle about its axis causesthe roller II to move from or toward the cooperating roller. The tool cannot be caused to travel round the circumference of the tube unless some means are provided to maintain a radial line passing through the axes of both of the rollers. Having only the parts that have been described, and assuming that a radial line can be drawn which will intercept the axis. of the tube and also the axes of the two rollers and that the roller i I has been forced down so as to produce a slight dent in the tube: it will be seen that when pressure is applied to the handle toswing it either towards. the right or towards the left, as viewed in Fig. 2, the rollers will not roll on the wall of the tube but will serve simply as a fulcrum about which the tool as a whole will rock. We have therefore provided means to prevent such rocking movement of the tool. This means comprises an arm [4 which, in effect, is a continuation of the'arm ID of the jaw that carries the roller H. The arm l4 extends laterally and also downwardly or outwardly well past the top of the roller 6. At the free end of the arm I4 is a long extension i5 that projects inwardly parallel with the axis of the roller H and, therefore, the axis of a tube positioned in the tool. The inner edge of this extension is so located that it engages, throughout its length with the outer surface of the tube at a considerable angular distance from the line of contact between the rollers and the tube. With this arrangement, when the tool is closed on the tube and is swung in such a direction that the arm I4 is leading or in advance, the tool is prevented from rocking about the point of contact between rollers and the tube, but it must slide bodily along the wall of the tube, the rollers in the meantime turning on their axes and pressing or drawing the wall into the desired bead formation. As best shown in Fig, 4 the extension or brace l5 has a. notch H5 in its inner or working edge, to provide clearance for the bead a as the latter develops.

Some means should be provided to serve as a stop against which the end face or edge of the tube may be held while the bead is being fashioned. In the arrangement shown, there are two such stops or bearing faces against which the end of the pipe may be thrust. One of these stops is the lower end of the inner arm 9 of the jaw 8 that carries the roller II; this arm projects far enough beyond the periphery of the roller l I to lie in the path of a tube that has been slipped on the lower arm of the head of the tool and rests on the roller 4. The other stop is a little lug IT at the free end of the extension I5 on the arm or brace l4; this lug projecting inwardly or toward the head proper. As best shown in Fig. 1, the working face of the lug I I lies in the same plane as does the stop face of the arm 9 of the carrier for the roller ll. With this arrangement the tool may be accurately positioned on the tube with the axis of the roller ll parallel to the axis of the tube.

We have found that if the axes of the rollers t and H are parallel there is a strong tendency to cause a lengthwise feeding movement of the tube in a direction to eject it from the tool. In other words, instead of producing an annular bead extending around the tube in a plane at right angles to the axis of the tube, the tendency is to produce a spiral bead. We have also found that this tendency to screw the tube out of the tool can best be overcome by placing the axis of the roller 4 slightly out of the parallelism with the axis of the cooperating roller, the angular displacement being in a direction to cause a slight tendency to feed the tube farther into the tool or, in other words, forcing the end edge or face of the tube positively against the stops.

Thus, viewing the two rollers as they appear in Fig. 1, their axes appear to lie in parallel planes. However, the axis of the roller 4 lies at an angle of a few degrees to a plane extending lengthwise of the tool and containing the axis of the roller II and of a tube in the tool.

The periphery of the roller t is preferably roughened somewhat, conveniently by forming therein fine transverse grooves I8. This enables the rollers to grip the metal of the tube and provide better traction than is the case when both gripping faces are smooth. Since the roughened roller acts on the inner surface of the tube no evidence of the biting action of this roller is visible on. the outer surface of the tube and no marring of that surface can occur.

It will be seen that if the arm or brace l4 fits properly against a tube of a given size it will not do so with respect to a tube of larger or smaller diameter. Therefore, if it be desired to employ the tool on tubes of different diameters, means must be provided to adjust it. A simple way of doing this is to make the arm M detachable and provide a series of arms of dif ierent sizes which may be interchanged with each other according to the sizes of tubes that are to be beaded. In the arrangement shown, the outer end of the shaft 20 for the roller ii is continued outwardly beyond the arm It! of the carrier and the member 14 is provided with a hole with which this projecting shaft end fits. Then, at some distance from this point, a screw 2i extends through the member I4 and into the arm l0. Consequently, by removing a single screw the member I4 may be detached although, when fastened in place, it is securely held.

The handle proper, I3, is a tubular member secured to a neck 22, shown as being integral with the arm 3 of the tool head, in such a man.- ner that the handle and the neck are free to turn relatively to each other about the axis of the handle, but are firmly held against relative movements in other directions. In the arrangerncnt shown, there is a heavy sleeve nut 23 fixed in and projecting beyond the inner end of the handle proper l3. This sleeve nut rests at its free or outer end on the end of the neck 22 and has thereon an annular out-turned fiange 24. The neck 22 is externally screw-threaded for some distance inwardly from its free or upper end, as indicated at 25. A coupling sleeve 26 fits rotatably on the projecting portion of the sleeve nut, has an internal shoulder 21 that rests on the flange 2 1, and is provided with an enlarged internally screw-threaded lower apron section 28 that is screwed upon the screw-threaded part of the neck 22. A set screw 29 may be employed to secure the coupling member against rotation on the neck of the tool head; whereby the coupling member is held in a fixed position without clamping the flange 24 so tightly as to interfere with the freedom of rotation of the handle.

The bar 1 which carries the roller l i has at its upper end a long externally screw-threaded stem 30 that fits the screw-threaded opening in the sleeve nut 23. Since the bar I is held against rotation in the head, as will be explained later, but may slide lengthwise, a turning movement of the handle results in an endwise movement of the bar, in one direction or the other. This endwise movement of the sliding bar carries the roller H toward or away from the cooperating roller 4, as the case may be. The main portion of the: bar 1 is shown as being square in cross section, and as the bar is slidably fitted in a correspondingly shaped seat in the tool head, the bar may slide but cannot rotate. The seat 3! is preferably in the form of a longitudinal groove cut into the neck member 22 through one side thereof. In order to confine the bar i in this groove, we provide a cover plate 32 for that part of the groove lying beyond the coupling sleeve 26; this cover plate being held to the neck member by a pair of screws 33. I

It will thus be seen that we have produced a simple and rugged tool with which protruding annular beads may quickly and accurately be pressed in the walls of pipes or tubes of sheet metal or other ductile material.

While we have illustrated and described with particularity only a single preferred form of our invention, we do not desire to be limited to the exact structural details thus illustrated and described; but intend to cover all forms and arrangements which come within the definitions of our invention constituting the appended claims.

We claim:

l. A beading tool comprising a member adapt- I ed to enter a tube, said member having thereon a roller of a contour conforming to the internal trough of the bead to be produced in the tube, said tool also having a second member adapted to overlie the tube at some distance from the latter, an element movably mounted on said second member so as to be adjustable from and toward the first member, a roller carried by said element and provided with an annular groove 5 registering'with the first mentioned roller, means o for forcibly pressing said element in a direction of a tube in the tool at a considerable angular distance from thezone of contact betweenthe rollers and the tube, said element having thereon a shoulder for engagement with the end edge by the tool.

of the tube.

2; A beading tool comprising a member adapted'to enter a tube, said member having thereon a roller of a contour conforming tothe internal trough of the bead to be produced in the tube. said tool also having a second member adapted to overlie the tube at some distance from the latter, an element movably mounted on said second member so as to be adjustable from and toward the first member, a roller carried by said element and provided with an annular groove registering with the first mentioned roller, means for forcibly pressing said element in a direction to bring the rollers together, and a rigid arm on tool adapted toengage with the periphery of a tube in the tool at a considerable angular distance from the zone of contact between the rollers and the tube, said element and said arm each having a bearing face to engage with the end edge of a tube that is being operated upon 3. A beading tool comprising a member adapted to enter a tube, said member having thereon a roller of a contour conforming to the internal trough of the bead to be produced in the tube, said tool also having a second member adapted to overlie the tube at some distance from the latter, an element movably mounted on said second member so as to be adjustable from and toward the first member, a roller carried bysaid element and provided with an annular groove registering with the first mentioned roller, means for forcibly pressing said element in a direction to bring the rollers together, and a rigid arm on said tool adapted to engage with the periphery of a tube in the tool at a considerable angular distance from the zone of contact between the rollers and the tube, the axis of rotation of the outer roller being parallel to the axis of a tube in the tool while the axis of the inner roller lies at a slight angle to a plane containing the aforesaid axes.

4. A beading tool comprising a body portion comprising member adapted to enter a stationary tube, said member having thereon a roller of a contour conforming to the internal trough of the bead to be produced in the tube, said body portion also having a second member adapted to overlie the tube at some distance from the latter, an element movably mounted on said second member so as to be adjustable from and toward the first member, a roller carried. by said element and provided with an annular groove registering with the first mentioned roller, a handle projecting from said body member in alignment with said element and rotatable about its long axis, connecting means between said handle and said element to cause the element to be forcibly moved in a direction to carry the second roller toward the first roller when the handle is turned in one direction, and a rigid arm on said tool adapted to engage with the periphery of a tube in the tool at a considerable angular distance from the zone of contact between the rollers and the tube and hold the tool and tube in such relative positions that a line extending radially of the tube through the point at which the latter is gripped between the rollers intersects the axes of the two rollers.

5. A beading tool comprising a C-shaped member one arm of which is adaptedto enter and the other-arm of which is adapted to lie outwardly from a tube to. be headed, the first arm having thereon a, roller of a contour conforming to the internal trough of the head to be produced in the tube, an element movably mounted on the second arm of said member so as to be adjustable from and toward the first arm, a roller carried by said i element and provided with an annular groove registering with the first mentioned roller, means for forcibly pressing said element in a direction to bring the rollers together, and a third arm on said member adapted to engage with the periphery of a tube in the tool at a considerable angular distance from the zone of contact between the rollers and the tube, said element and said third arm each having a bearing face to engage with the end edge of a tube that is being operated upon by the tool; and the first of said rollers being set s with its axis making a small angle with the axis of the tube so that when the tool is. swung in a plane at right angles to the axis of the tube, with said third arm in advance, the rollers act to force the tube lengthwise against said bearing faces.

6. A beading tool comprising a member adapted to enter a tube, said member having thereon a roller of a contour conforming to the internal trough of the bead to be produced in the tube, said tool'also having a second member adapted to overlie the tube at some distance from the latter, an element movably mounted on said second member so as to be adjustable from and toward the first member, a roller carried by said element and provided with an annular groove registering with the first mentioned roller, means for forcibly pressing said element in a direction to bring the rollers together, and a rigid arm on said tool adapted to engage with the periphery of a tube in the tool at a considerable angular distance from the zone of contact between the rollers and the tube, and a stop for the inner end of a tube in the tool, the inner roller facing being set at a slight angle such that the action of the rollers is to force the tube against said stop when the tool is swung around the axis of the tube with said rigid arm in advance.

7. A beading tool comprising a head having thereon complementary beading rollers one of which is adapted to enter a tube to be beaded and the other of which is positioned outside of the tube, means to force said rollers together, a handle on said head for swinging the tool bodily around the axis of the tube while the tube is held stationary and a brace projecting from the head and adapted to. engage with the exterior of the tube at a point angularly displaced.

from the zone of contact between the inner roller and the tube and maintain the point of contact between the rollers and the tube on a straight line that intersects the axes of the rollers and of the tube.

8. A beading tool comprising ahead having thereon complementary beading rollers one of' which is adapted to enter a tube to be headed and the other of which is positioned outside of the tube, and grip the tube at a point which is located on a straight line that intersects the axes of the rollers and of the tube, means to force said rollers together, a handle on said head for swinging the tool bodily around the tube while the latter is held stationary and means to prevent the tool from rocking about the point at which the wall of the tube is gripped by the rollers when the tool 9. A beading tool comprising a head having thereon cooperating bead-forming rollersadapted to grip the wall of a tube inserted between them with its axis extending in the general direction of the axes of rotation of the rollers, the parts being arranged to grip the tube as aforesaid at a point that lies on a straight line radial of the tube and intersecting the axes of the rollers, a handle on the head by which the tool may be bodily swung around while the latter is held stationary, means to prevent rocking ofthe tool relative to the tube when the tool is swung about the tube in one direction and means to force said rollers together to deform the said wall.

10. A beading tool comprising a member adapt to enter a tube, said member having thereon a roller of a contour conforming to the in- .ternal trough of the bead to be produced in the .tube, said tool also having a second member adapted to overlie the tube at some distance from the latter, an element movably mounted on said second member so as to be adjustable from and toward the first member, a roller carried by said element and provided with an annular groove registering with the first mentioned roller, a handle connected to said members for swinging the tool bodily around the tube while the latter is held stationary, means for forcibly pressing said element in a direction to bring the rollers together, and means to maintain the tool while being swung around the tube in one direction in the position that maintains the point of contact between the tube and the rollers on a line extending radially of the tube and intersecting the axes of the rollers.

11. A beading tool comprising a member adapted to enter a tube, said member having thereon a roller of a contour conforming to the internal trough of the bead to be produced in the tube, said tool also having a second member adapted to overlie the tube at some distance from the latter and provide it with a handle for swinging the tool about the axis of the tube while thetube remains stationary, an element movably mounted on said second member so as to be adjustable from and toward the first member, a roller carried by said element and provided with an annular groove registering with the first mentioned roller, means for forcibly pressing said element in a direction to bring the rollers together, a rigid arm on said tool, said arm having a part of considerable length adapted to engage with the exterior of a tube in the tool at a considerable distance from the zone of contact between the rollers and the tube and lie parallel with the axis of the tube, the parts being so proportioned that when the wall of the tube is gripped between the rollers and said arm contacts with the exterior of the tube, the point of contact between the tube and the rollers lies in a line intersecting the axes of the tube and the rollers.

NILS A. TORNBLOM. ERIC BYLUND.

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