US2430168A - Tool for flaring or beading tubing - Google Patents

Description

Nov. 4, 1947. G. M. GRAHAM TOOL FOR FLARING OR BEADING TUBING Filed Nov. 24, 1945 2 Sheets-Sheet 1 INVENTOR. BY Jaye gala TOOL FOR FLARING OR BEADING TUBING Filed Nov. 24, 1943 2 Shegts-Shet 2 INVENTOR.- v xfl BY y X77212 A v fiuga/x proper shape upon the end of the tube.

Patented Nov. 4, 1947 TOOL FOR FLARING R READING TUBING George M. Graham, Detroit, Mich, assignor to Hinckley-Myers Division of Kent-Moore 0rganization Inc., Jackson, Mich, a corporation of Michigan Application November 24, 1943, Serial No. 511,513

- 4 Claims.

This invention relates to an improved tool for forming the end portion of a metal tube such as flaring or beading the same.

The object is to provide a small portable hand tool of the character described adapted particularly for use in repair shops and service stations.

Metal tubing such as hydraulic brake tubing and the like is usually flared at the end to assist in coupling the sections of the tubing together to complete a system. It is also frequently desirable to form a bead in the tube. In repairing such systems the length of tubing which may be necessary to make the repair varies widely and it is not convenient to stock sections having flared or beaded ends in all the lengths that may be required.

This improved tool may be held in the hand to perform any such operation. If desired the body of the tool may be gripped in a vise. The tool includes the die which receives the end of the tube to be formed and the cooperating punch which in conjunction with the die produces-the The entire assembly is a complete unit and the body of the tool is so formed that the die blocks are held securely in position and in turn securely hold the tube in position during the forming operation.

An object is to provide a compact hand tool of this character wherein the body is so constructed that the die blocks when gripped therein are accurately aligned with the punch. A meritorious feature of my construction is that the die blocks are readily replaceable with other die blocks and the body of the tool is so formed as to facilitate this replacement. The punch member is also readily replaceable.

The above objects and others will be more fully apparent from the following specification, claims and accompanying drawings wherein:

Figure 1 is a plan of a tool embodying my invention,

Figure 2 is a front elevation of the tool shown in Figure 1,

Figure 3 is a cross-sectional view taken on the line 3-3 of Figure 2,

Figure 4 is a cross-sectional view taken on the line 4i of Figure 2,

Figure 5 is a fragmentary broken-away sectional view showing the punch member acting upon the end of a tube during the first step of flaring operation,

Figure 6 is a fragmentary broken-away view showing the punch member acting upon the end of the tube during the second step of the flaring operation,

Figure 7 is an elevation of a fragment of a modified form of my improved tool,

Figure 8 is a cross-sectional view taken on the line 8-8 of Figure '7,

Figure 9 is a fragmentary cross-sectional view showing a bead forming punch in operative position.

M improved tool comprises a body portion having bifurcations l0 and I2 terminating at one end in a portion I4 cored out to provide a guideway for a ram 16. The body is provided at the opposite end with a die-receiving channel portion formed by extensions 18 and 20 of the bifurcations Ill and I2, respectively.

These end extensions are shown in cross-section in Figure 4 and are provided with oppositely disposed inwardly projecting bottom flanges spaced apart by a space 22 as shown in Figure 4. End extension 20 carries a pin 24 which extends freely through an opening provided in extension 18 and is provided with a head 26 as shown in Fig. 3. The pin permits the extensions l8 and 20 to be yieldingly urged toward each other but prevents undue separation. The free positioning of pin 24 within the opening in extension 18 provides a certain amount of play but constitutes a positive stop against excessive spreading movement of extension IS with reference to extension 20. At the same time extensions I8 and 20 may be moved toward one another against the inherent spring in the branches of the bifurcation, of which I8 and 20 are simply extensions, at least to the limit of play permitted by such free positioning.

These extensions l8 and 26 constitute in combination a channel portion adapted to receive complementary die blocks 30 illustrated particularly in Figures 3 and 4. These die blocks are so shaped as to exhibit complementary semicircular cavities 32 which when disposed in facing relationship provide a tube-receiving channel. Two pairs of different diameter semi-circular passageways are provided. In Figures 3 and 4, a tube 34 is shown as received between the die blocks within the channel formed by one of the two pairs of cavities.

The ram 16 is cored out at one end as at 36 to receive a punch member 38. The punch member has a flange 40 which positions it within the cored out cavity of the ram and the two ends of the punch member shown in Figures 1, 5 and 6 are differently formed to perform the two necessary steps in the flaring operations as herein- 3 after described. The punch member itself and the particular shape of the two ends is old in the art as shown in the patent to Corrigan 2,117,543.

The body is bifurcated for such a distance as to permit ready removal of the punch member from the end of the ram and replacement with a different punch member. The branch l2 of the bifurcated portion of the body is arched as shown at I3 to impart spring thereto so that the extensions I8 and 20 of the two branches and ll of the bifurcated portion of the body are relatively yieldable toward each other to grip the die blocks 30 securely therebetween.

In Figures 1 to 4, a hand clampingdevice is provided to grip these extensions I 8 and 20 together against the die blocks. This clamping device comprises a pair of cooperating plates 4| and 42 held together by two tightening bolts 44- as shown in Figures 1 to 4 inclusive. When this clamping device is engaged about the. bifurcation of the tool, the tool may be held in the hand to perform the forming. operation.

ported in line with the. tube receiving passa eway within the die blocks.

In Figures 7 and 8 is shown. a modified form. of construction. In this modification, the channel portion is integral as shown in Figure 8;. This channel portion is indicated at 50., Die block 52 are shown positioned therein. These die. blocks.

have such a combined dimension that. they project above the top surfaceof the channel A plate 54- is pivoted by a stud: 55; toanear 8 at one side of the channel 53. This plate has a notch 5:0; formed on its opposite end; adapted to be received over the shank of a headed stud; $2 threaded into an car on the opposite sideof the channel. as shown particularly in Figure 8.,

When it. is desired toposition the die blocks within the channel 5B the plate. may be swung backto the dotted line position shown in Figure '7. and suitable die blocks positioned within; the channel. The plate may then be swungover these die blocks to the position sl'iownin Figure 8 andthe studs tightened to secure; the; die; blocks firmly in place. To prevent endwise movement, a. plate 64 is held by studs Elto the end: or the channel as shown in Figure '7,

When it is desired to. operate the toolto flare a piece of tubing the end of the tubing is out; ch square. The proper size die blocks are selected and placed within the channel of the; body and the square cut end of the tubing is allowed to project about one quarter inch beyond-theinner edge of: the die-blocks toward the punch.

If the device is to be used in a vise the channel portion is placed within the vise and just suffh cient pressure placed thereon to hold the; die blocks in place. If it is to be used with-the; hand clamp such clamp is similarly tightened against.

the blocks. The proper size punch member or flaring tool is: then placed within that end of the ram adapted to receive the same. Therein punch is. then moved toward the; tubing; to Enter the pilot en of; the punch into the tu ing... nd

of the ram is then tapped with a hammer until the guide line 66 shown thereon in Figures 1, 2 and 5 is brought in line with the end of the body as shown in Figures 1 and 2. This will have adjusted the tubing to the proper position between the die blocks for carrying out the flaring operation. The hand clamp or vise is then tightened down to securely hold the die blocks against the tubing in such a manner that further endwise slippage of the tubing is prevented.

In the first step. of the flaring operation the outwardly concave end of the punch shown in Figure 5 is utilized to shape the end of the tube as illustrated in such figure. In the second step of the flaring operation the opposite end of the punch is employed to finish the shape of the flared end of the tube as shown in Figure 6.

On the construction shown in Figure 9 a bead forming punch is employed. The body 68 of this punch is provided with an arcuate die portion 10 which is complementary to an arcuate die portion 12 on die blocks 14 The end of the punch also is provided with a projecting male member 75 of a size to enter the end of the tube as shown.

The end of the tube being shaped seats within the bottom of the recess about the male portion 1 6-. The tube is held against endwise slippage be tween the die blocks as hereinabove described in connection with the description of the flaring operation. When the impact pressure is applied to the end of the tube by the punch the tube isupset between the complementary arcuate die faces Ml and T2 of the punch and die blocks respectively forming a. circumferential bead about. the tube.

What I claim is:

1. In a tube shaping tool, a bifurcated body terminating at one end in a juncture of the two branches of the bifurcation in a tubular guidewayfor a ram and terminating at the opposite end in the free end portions of the two branches of the bifurcation, said free ends beingv complementary and spaced apart and shaped to define a channel therebetween in line with the tubular guideway, a ram reciprocally mounted within said tubular guideway-, complementary die blocks removably received withinthe channel between the free ends of the two branches of the bifurcation, a pin connecting the free ends of the two branches of the bifurcation holding them against separation while permitting relative limited movement of such two branches toward and away from each other, said pin disposed at the end of the channel between said free ends constituting an end stop for the die blocks, and clamping means embracing the free ends of said branches. holding the die blocks therebetween.

2. A tube shaping tool comprising, in combination, a bifurcated body, the juncture of the branches thereof being formed into a, sleeve adapted to slidably receive a ram, a dieblock securing channel formed from opposed faces of said branches extending in line with said sleeve, one branch of said bifurcation being arched outwardly between said sleeve and said channel to impart resilience to the branch enabling the same to be resistingly swung toward the other branch to vary the distance therebetween, and a pin connecting said branches adjacent to the free ends thereof serving as a stop for limiting lateral movement of the branches. away from one another, said pin extending across said channel at the outer end thereof also serving as a stop limiting endwise movement of' the die blocks inserted in the channel.

3. In a tube shaping tool, a, bifurcated body terminating at one end in a juncture of the two branches of the bifurcation in a, tubular guideway for a ram and terminating at the opposite end in two spaced apart free end portions of the two branches of the bifurcation, at least one of said branches being flexible for resisted movement toward and away from the other branch, said free end portions being complementary and shaped to define a channel therebetween in line with the tubular guideway, a ram reciprocally mounted within said tubular guideway, complementary die blocks removably received within the channel between the free end portions of the two branches of the bifurcation, and means embracin the free end portions of said branches and adapted to compress the free end portions toward one another to cause the latter to tightly clamp the die blocks therebetween.

4. In a tube shaping tool, a bifurcated body terminating at one end in a juncture of the two REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,795,358 Arndt Mar. 10, 1931 2,117,543 Corrigan May 17, 1938 1,077,812 Derbyshire Nov. 4, 1913 1,526,339 Henry Feb. 17, 1925 1,754,637 McGough Apr. 15, 1930 1,791,887 Davies et a1 Feb. 10, 1930 2,297,885 Graf et a1 Oct. 6, 1942 1,560,186 Muth Nov. 3, 1925

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