JPH06251B2 - Manufacturing method of metal tube with extra long wire - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for producing a metal tube with a filament body having an extra length, in which a filament body is accommodated with an extra length in a metal tube body.

In order to protect the filamentous body from the tension, there has been proposed a metallic tube 3 with a filamentous body 3 having an extra length in which a filamentous body 2 is accommodated in a metal tube body 1 with an extra length as shown in FIG. There is.

However, it is actually very difficult to accommodate the filament 2 in the metal tube body 1 with an extra length, and a practical manufacturing method has not been completed yet. In particular, one of the factors that obstruct the provision of the extra length is the frictional force between the linear body 2 and the metal tube body 1.

It is an object of the present invention to provide a metal tube with a wire rod body with an extra length that can easily add an extra length to the wire rod body in the metal tube body while reducing the frictional force between the wire rod body and the metal tube body. It is to provide a manufacturing method.

The method for producing a metal tube with extra-length filaments according to the present invention, when moving a metal tape to form a pipe and welding the seams to obtain a metal tube body, from the moving speed of the metal tape, The filament in the metal tube body is fed at a high speed into the metal tube body through the guide tube, and the guide tube is vibrated to vibrate the filament body in the metal tube body. It is characterized by giving extra length to the body.

Embodiments of the present invention will be described in detail below with reference to the drawings.
As shown in FIGS. 2 to 4, in the method of manufacturing the metal tube containing the extra linear member according to the present embodiment, the metal tape 1 ′ is fed from the tape supply 4 and the roll forming type molding device 5 is used.
In the process of passing through the metal tape 1'by a plurality of forming rolls 6
Pipe forming. Further, the roll forming type molding device 5 is supplied with the filament 2 from the filament supply 7, and the filament 2 is fed into the metal tape 1 ″ formed into a pipe. Metal tape 1'with pinch roll 8
At a speed (a + α) m / min higher than the feeding speed am / min of (1), and is forcedly fed into the pipe-forming metal tape 1 ″, and is meandered in the pipe-forming metal tape 1 ″ to give an extra length. A guide pipe 9 is provided between the pinch roll 8 and the inlet of the pipe-forming metal tape 1 ″ so that the line-shaped body 2 does not buckle when the line-shaped body 2 is forcibly fed into the pipe-forming metal tape 1 ″. And the tip of the guide tube 9 is inserted into the pipe-making metal tape 1 ″ to guide the filament 2. The guide tube 9 is equipped with an ultrasonic vibration device 10 By vibrating 9, the linear body 2 is vibrated to reduce the friction between the linear body 2 and the pipe-forming metal tape 1 ″, and the sliding of the linear body 2 with respect to the pipe-forming metal tape 1 ″ is improved. Then, the filament 2 is easily meandered in the pipe-making metal tape 1 ″ so that the extra length can be easily provided. In this case, the surface of the pinch roll 8 is the linear body 2
It is preferable to use a soft material such as rubber or plastic so as not to damage the material. Next, the pipe-making metal tape 1 ″ is sent to the welding process, and the squeeze roll 11 is pressed to hold the joint in a closed state, and the joint is welded by the welder 12 to sequentially form the metal pipe main body 1. The metal tube 3 with the extra long filament thus obtained is wound around the rotating body 13 such as a drum installed immediately after the welding process for about 1 to 2 turns, and then wound by the winder 14. Once the metal tube 3 with the extra linear wire is wound around the rotating body 13, the same state as when the linear body 2 in the metal tube body 1 is fixed to the metal tube body 1 is obtained. A state in which the force for pushing the filamentous body 2 does not reach the filamentous body 2 in the metal tube body 1 ahead of the rotating body 13 and it is as if the filamentous body 2 is pushed by pushing the tip of the filamentous body 2. Therefore, the extra length can be effectively given to the linear body 2.

The filament 2 to be protected by the metal tube body 1 is an insulated wire or an optical fiber core wire. In particular, when carrying out this method, it is preferable that the filament 2 has a high rigidity and does not buckle, for example, in the case of an optical fiber core, a fiber-reinforced plastic coated optical fiber core or the like.

It should be noted that a winding drum may be used as the rotating body 13 to immediately wind the body. If the position of the rotating body 13 is too far from the forming device 5, the effect of fixing the filamentous body 2 in the metal tube body 1 is less affected, which is not preferable.

Experimental Example 1 Metal tube body: Aluminum outer diameter 4.2 mm, wall thickness 0.5 mm, forming speed 9.99 m / min. Linear body: outer diameter 2.0 mm, pushing speed 10 m / min Guide tube: stainless steel outer diameter 3.0 mm, wall thickness 0.15mm Ultrasonic vibration: Output 100W, Frequency 20kHz Rotating body: Outer diameter 500mm Experimental example 2 Metal tube body: Steel outer diameter 5.0mm, wall thickness 0.3mm, forming speed 4.0m
/ Slitting line: Outer diameter 1.0mm, pushing speed 4.02m / min Guide tube: Stainless steel, outer diameter 2.5mm, wall thickness 0.1mm Ultrasonic vibration: Output 200W, frequency 25kHz Rotating body: outer diameter 500mm Each of the above Depending on the structure, 0.2-1% of the filaments in the metal tube body
Was able to be accommodated with extra length.

As described above, in the present invention, since the filamentous body is fed into the metal tube body through the guide tube at a speed higher than the moving speed of the metal tape, the extra length is given to the filamentous body. It is possible to easily manufacture the metal tube with the extra long linear body while preventing the buckling of the linear body even if the linear body is pushed in. Further, in the present invention, since the pushing is performed while vibrating the linear body by vibrating the guide tube, it is possible to effectively reduce the friction between the linear body and the metal tube body, The striatum can be pushed in easily.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a metal tube containing a filamentous body with extra length, FIG. 2 is a side view showing an example of an implementation step of the method of the present invention, and FIGS. 3 and 4 are inside a pipe-forming metal tape. FIG. 3 is a partially cutaway side view and a plan view of the linear body pushing step. DESCRIPTION OF SYMBOLS 1 ... Metal tube main body, 2 ... Striation body, 3 ... Metal tube with extra length filament body, 4 ... Tape supply, 5 ... Molding device, 7 ... Striation body supply, 8 ... Pinch roll, 9 ... Guide tube 10 ... Ultrasonic vibrator, 12 ... Welding device, 13 ... Rotating body.

Claims (1)

[Claims] 1. When forming a pipe while moving a metal tape and welding the joints to obtain a metal pipe main body, a linear member is formed in the metal pipe main body at a speed higher than the moving speed of the metal tape. Includes a linear body with extra length, characterized in that the linear body in the metal pipe body is provided with an extra length while being fed through the guide tube and vibrating the guide tube to vibrate the linear body. Manufacturing method of metal tube.