JP3261467B2 - Manufacturing method of metal multilayer bar and multilayer tube - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to an electric component, an electric wire,
The present invention relates to a method for manufacturing a multi-layered rod, such as a double pipe or a triple pipe, in which a metal round bar is inserted into an outer pipe and which is used for an automobile, OA equipment, and the like.

[0002]

2. Description of the Related Art Conventionally, a double tube c composed of a large-diameter stainless steel outer tube a and a small-diameter copper inner tube b illustrated in FIG.
As shown in FIG. 9, a triple pipe (not shown) is an outer pipe a _1.
Put the carbide die d in a state of inserting the inner tube b _1, and a method of manufacturing pull out the arrow e direction illustrated in Dorobenchi have been taken.

[0003]

However, in the above-mentioned conventional manufacturing method, since the length that can be pulled out by the drawbench is limited, the maximum length of the multi-tube is 6 m to 10 m. For this reason, for example, in a region where salt damage occurs, even if it is desired to use a wire having a double structure, the cost is high and the wire cannot be used at present.

[0004] The present invention has been made in view of the above-mentioned problems of the prior art, and sends the inner member to the outer member while feeding the long circular inner member and the long band-shaped outer member in a certain direction. Then, a series of operations such as welding, cooling, and winding of the butted end of the outer member are continuously performed, so that the long member (e.g., 200 m to 300 m) which has conventionally been difficult to manufacture. )
An object of the present invention is to provide an automated metal multi-rod and multi-tube manufacturing method capable of manufacturing a product easily and at low cost.

[0005]

In order to achieve the above object, a method of manufacturing a metal multi-layer rod and a multi-tube according to the present invention comprises:
From a coil stand having an upper drum for winding a metal inner member having a circular cross section and a lower drum disposed below the upper drum and winding a metal band-shaped outer member, the center of the inner member is A sending step of sending the inner member and the outer member at the same speed in the same direction so that an axis and a central axis in the longitudinal direction of the outer member coincide with each other; Fitting into the groove provided around the grooved upper roller, the outer member,
In a state of being mounted on a first grooved lower roller provided below the first grooved upper roller and provided with a groove for molding the outer member into a substantially semicircular shape, By lowering the one grooved upper roller in the direction of the first grooved lower roller, the inner member is pushed into the groove of the first grooved lower roller via the outer member, and the outer member is rotated around the grooved lower roller. A first forming step of forming the same substantially semi-circular shape or substantially half-angle shape as the groove to be provided, and a pair of left and right outer members formed into the substantially semi-circular shape or substantially half-angle shape in the first forming step. A substantially circular shape is formed by a second forming step of forming a substantially circular shape so that the outer periphery of the inner member is wound around by the grooved roller, and a flange passing through a lowermost point of a groove provided around the second grooved upper roller. Of the upper part of the outer member The outer member is formed by forming the portion into a narrow groove having a fixed width, and by using the second grooved upper roller and a second grooved lower roller provided below the second grooved upper roller. A third forming step of forming a circular shape, a welding step of welding the butted ends of the outer member to form a metal multi-layer rod or a multi-pipe, a cooling step of the metal multi-layer rod or a multi-pipe, and And a winding step.

[0006]

The upper drum of the coil stand is wound with a metal rod-shaped inner member, and the lower drum is wound with an outer member made of a metal band-shaped plate. The upper and lower members are fed at the same speed in the rewinding process, and the inner member is straightened and the outer member is flattened, the transfer speed is controlled, and the sheet is transferred to the next first forming step.

In the first forming step, three pairs of upper and lower rotating first grooved rollers are arranged, and the inner member is pushed into the outer member by these, so that the outer member is substantially semicircular. And is transferred to the next second forming step.

In the second molding step, three pairs of left and right rotatably driven grooved rollers are arranged, whereby the outer member is formed into a substantially circular shape while the inner member is being wound. Is transferred to

[0009] In the third molding step, a second grooved upper rollers having a flange that is opposite axially supported vertically, the
With the two-groove lower roller, the butted end of the outer member is squeezed into a fixed narrow groove, and the outer member is formed into a circular shape and transferred to the next welding step.

In the above welding process, a multi-layered bar is manufactured by welding the butted end of the outer member, and is transferred to the next cooling process. In this cooling step, the multi-layer rod heated by welding is cooled, and in the next winding step, it is wound on a rotating drum.

After the inner and outer members are initially sent out by the above-mentioned sending-out step, the members are re-wound, and
It is also transferred by the respective rollers that are rotationally driven in the molding step, the second molding step, and the third molding step, and the drums that are rotationally driven in the winding step. The drum reciprocates in the axial direction while rotating, and winds up the multi-layered rod uniformly.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a method for manufacturing a metal multi-layer rod and a multi-pipe according to the present invention will be described with reference to an embodiment shown in FIGS. FIG. 1 shows a schematic side view of the entire apparatus, and FIGS. 2 (A), 2 (B) and 2 (C) show the first apparatus.
FIG. 3 shows a front view of a specific structure in a molding step, and FIG.
(A), (B), (C) shows a front view of a specific structure in the second molding step, FIG. 4 shows a vertical sectional side view of a specific structure in the third molding step, and FIG. 5 shows a third molding step. The front view of the specific structure in a process is shown.

In FIG. 1, 1 is a coil stand, 2 and 3 are a copper round bar as an inner member wound around an upper drum 4 and a lower drum 5 of the coil stand 1 and a stainless steel strip as an outer member. Show the board. As shown in the same figure, the round bar 2 and the band-shaped plate 3 are the same in the vertical arrangement from the respective drums 4 and 5 by the sending steps 6 and 7 including a pair of upper and lower sending rollers 6a, 6a, 7a and 7a. It is fed at a speed, washed through the degreasing liquid in the degreasing tank 8, and sent forward (to the right in FIG. 1).

On the transfer line for the round bar 2 and the strip 3, as shown in FIG.
Molding step 10, second molding step 11, third molding step 12,
A welding step 13, a cooling step 14, and a winding step 15 are sequentially provided.

As shown in FIG. 1, in the rewinding step 9, a pair of upper and lower rollers 9a and 9b which are driven to rotate in a straight line while transferring the round bar 2 are supported. , And a plurality of rollers 9c, 9c,..., Which are rotationally driven to correct the band-shaped plate 3 into a flat shape, and a horizontal bottom plate 9d. In the same step 9, the rewinding and the feeding speed of the round bar 2 and the strip 3 are controlled.

The first molding step 10 is shown in FIG.
As shown in (B) and (C), the groove 16 has the same curvature as the peripheral surface of the round bar 2 and is provided with a groove 16 for fitting and rotating and transferring the upper half of the round bar 2. First grooved upper roller 1
0a and the first grooved lower roller 10b provided with a groove 17 for forming into a substantially semicircular shape by pressing the band-shaped plate 3 into a fixed direction in the transfer direction of the round bar 2 and the band-shaped plate 3. A plurality of pairs (three pairs in the illustrated example) are rotatably supported at intervals. Also, the first grooved upper roller 10a, 1
0a, 10a are the first grooved lower rollers 10b, 10b.
b and 10b are provided so as to be movable in a direction in which they are separated from and contacted with each other.
The upper roller 10a descends and the first grooved lower roller 1
0b, the belt-like plate 3 is pushed into the groove 17 via the round bar 2, and is formed into a substantially semicircular shape.

The second molding step 11 is shown in FIG.
As clearly shown in (B) and (C), a pair of left and right grooved rollers 11a and 11b are arranged in a plurality of pairs (three pairs in the illustrated example) at a fixed interval in the transport direction of the round bar 2 and the band-shaped plate 3. It is rotatably supported. Each of the rollers 11a and 11b is formed by forming a groove 18 around which the band-shaped plate 3 is wound around the round bar 2 and formed into a circle.
Both (a) and (1b) of 1a and 11b are supported so as to be able to reciprocate horizontally in the horizontal direction.
As shown in (B) and (C), the belt-like plate 3 formed in the substantially semicircular shape in the first forming step 10 is formed into a substantially circular shape.

In the third forming step 12, as shown in FIGS. 4 and 5, the round bar 2 is wound around and the band-shaped plate 3 is formed into a circular shape. Groove 1
9 with a second grooved upper and lower, both rollers 12a, 12b
And two are rotatably driven back and forth, and are rotatably supported in a direction in which they are separated from each other. The belt-like plates 3 are provided by the second grooved rollers 12a and 12b.
To form a circular groove in the center of the groove 19 of each of the second grooved upper rollers 12a, 12a at the butt end 3a of the band-shaped plate 3. Of the second grooved upper roller 12a at the front (left side in FIG. 1).
4 and 5, the flange 20 of the second grooved upper roller 12a at the rear (right side in FIG. 1) shown in FIGS. 4 and 5 is formed to be thin, for example, within 0.8 to 1 mm. The narrow groove 3b suitable for welding in the next welding step 13 is formed in two steps.

The welding step 13 employs roll homing welding, torch welding, or the like. As shown in FIGS. 1 and 4, the narrow groove 3 is located near the rear of the third forming step 12.
The part b is welded to produce the multilayer bar 21. Note that FIG.
6 (D) and 7 (A) to 7 (E), reference numeral 22 denotes a welded portion.

In the cooling step 14, the multilayer rod 21 heated by welding is moved in the cooling tank 14a shown in FIG.

In the winding step 15, as shown in FIG. 1, the drum 15a rotates in the direction indicated by the arrow a to wind up the multi-layer rod 21, and the drum 15a reciprocates in the axial direction to move the multi-layer rod. The rod 21 is formed so as to be uniformly wound.

When the outer diameter of the round bar 2 is 7.2 mm, a gap of about 0.4 to 0.5 mm is formed between the round bar 2 and the outer tube formed by the band-shaped plate 3. The inner diameter of the outer tube is formed to be 7.6 mm in order to have it.

Further, the thickness of the belt-like plate 3 is 0.5 mm
The current for torch welding is preferably 100 A or less, and the transfer speed of the multilayer rod 21 during welding is preferably 3 to 4 m / min.

FIGS. 6 (A), (B), (C) and (D)
The manufacturing state in the case of manufacturing the multilayer bar 21 by the manufacturing method of the present invention is shown in order. In addition, according to the manufacturing method of the present invention, as shown in FIG. A triple-layer rod 25 sequentially wound by the strip 24 and the stainless steel strip 3, or a triple pipe by sequentially winding the copper pipe 26 by the stainless steel strip 3 and the titanium strip 27 as shown in FIG. 28
Etc. can also be manufactured.

Further, the multi-layer rod 21 manufactured as described above is put in a deformed carbide die (not shown), and is wound around a drum and pulled out to obtain a square double-layer rod 29 shown in FIG. Alternatively, it can be manufactured into a rectangular double-layered rod 30 shown in the same figure (D), an elliptical double-layered rod 31 shown in the same figure (E), and other various shapes.

[0026]

According to the present invention, a multi-layer rod and a multi-tube are manufactured as described above. Therefore, a long object (for example, 200 m to 300 m) which has conventionally been difficult to manufacture can be easily manufactured. In addition, since the manufacturing is performed continuously, the manufacturing efficiency is improved, and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic side view showing an example of an apparatus that can be used to carry out a method for manufacturing a metal multilayer rod and a multilayer pipe according to the present invention.

FIGS. 2A and 2B are front views each showing a specific cross section of a specific configuration in a first molding step of the above device. FIGS.

FIGS. 3A and 3B are front views each showing a specific cross section of a specific configuration in a second molding step of the apparatus.

FIG. 4 is an enlarged vertical sectional view showing a specific configuration in a third molding step of the above device.

FIG. 5 is an enlarged front view showing a specific configuration in a third molding step of the above device.

FIG. 6 is an explanatory view showing, in order, the steps of manufacturing a double-layer round bar according to the manufacturing method of the present invention.

FIGS. 7A and 7B are cross-sectional views respectively showing a triple-layer round bar and a triple tube manufactured by the manufacturing method of the present invention;
(C), (D) and (E) are cross-sectional views respectively showing the double-layer round bar manufactured by the manufacturing method of the present invention, which is further manufactured by using a carbide die.

FIG. 8 is a cross-sectional view showing a double pipe manufactured by a conventional manufacturing method.

FIG. 9 is a longitudinal sectional view showing a state in which a double pipe is manufactured by a conventional manufacturing method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Coil stand 2 Inner member 3 Outer member 3a Butt end 3b Narrow groove 6, 7 Sending process 10 First forming process 11 Second forming process 12 Third forming process 13 Welding process 14 Cooling process 15 Winding process

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B21C 37 / 04,37 / 06 B32B 1 / 08,15 / 01 B23K 20/00

Claims (1)

(57) [Claims] 1. A coil stand comprising: an upper drum for winding a metal inner member having a circular cross section; and a lower drum disposed below the upper drum and winding a metal band-shaped outer member. Sending out the inner member and the outer member at the same speed in the same direction so that the center axis of the inner member coincides with the center axis in the longitudinal direction of the outer member; Half is fitted in a groove provided around the first grooved upper roller, and the outer member is provided below the first grooved upper roller, and the outer member is formed into a substantially semicircular shape. The upper roller with the first groove is lowered in the direction of the lower roller with the first groove in a state where the roller is placed on the lower roller with the first groove in which the groove for forming the first roller is provided. First inner member
A first forming step of pressing the outer member into the groove of the grooved lower roller and forming the outer member into the same substantially semicircular shape or a substantially half angle shape as the groove provided around the grooved lower roller; A second forming step of forming the outer member formed into a substantially semicircular shape or a substantially half angle shape into a substantially circular shape so that the outer periphery of the inner member is wound by a pair of left and right grooved rollers; and a second grooved upper roller. The upper end of the outer member, which is formed in a substantially circular shape, is formed into a narrow groove having a constant width by a flange passing through the lowermost point of the groove provided in the upper portion with the second groove. A third forming step of forming the outer member into a circular shape by a roller and a second grooved lower roller provided below the second grooved upper roller; and welding the butted end of the outer member. , Metal multi-layer rods Ku is a welding process to form a multi-tube method for producing a metallic multi-layer rod and multi-wall, characterized in that it comprises a cooling step and the winding step of the metallic multiple layer rods or multiple tubes.