JPS628251B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a continuous metal twisting device that continuously twists a fin tube, a fin wire, or the like made of, for example, a rod-shaped or wire-shaped metal material.

Fins may be attached to the outer circumferential surface, inner circumferential surface, or inner and outer circumferential surfaces of metal tubes and wires for various purposes. (See Figure 1) Furthermore, in the case of heat exchanger tubes, for example, in order to improve thermal efficiency,
This fin tube may be twisted.
(See Figure 2).

Extrusion and drawing methods are generally known as conventional processing methods for imparting twist to such fin tubes and wires. This method involves twisting the protrusion of the extrusion or drawing die,
This is a method of extrusion or drawing. According to this method, the production cost of the die increases, the production efficiency is significantly lowered due to the material sticking to the die part, and there is also a limit to the twist angle.

This invention was proposed to address the above-mentioned conventional problems, and the gist of this invention is to wind up a finned product extruded from a continuous extrusion device onto a reel, set this reel on a twisting machine, and then It is characterized by giving a torsion.

The embodiments shown in the drawings will be described below.

Reference numeral 1 denotes a twisting machine which is rotatably supported on a shaft 2, and a reel 3 on which a hooked product continuously extruded without twisting from a continuous extrusion device (not shown) is wound up is detachably and rotatably supported. A transmission mechanism 8, which has a frame-shaped frame 4 for supporting it, guide sheaves 6 and 7 for guiding the finned product 5 rewound from the reel 3 to the outside of the machine, and is attached to the shaft end of the frame 4;
It is interlocked with a driving electric motor 11 via 9 and 10. 12 is a twisting sheave outside the twisting machine and in the middle of the traveling direction of the finned product 5; 13 is a guide sheave that moves laterally in a direction perpendicular to the traveling direction of the finned product; 14 is a winding machine; and 15 is a twisting sheave. Stop sheave 12
This is an arithmetic circuit provided in a connection circuit between the drive motor 11 and the drive motor 11.

Next, the effect will be explained. A finned product 5 extruded from a known continuous extrusion device, such as a Conform, is wound onto a reel 3 by conventional means, and this reel 3 is set on a twisting machine 1. Next, the finned product 5 is rewound from the reel 3, and its tip is passed through the hole 1a drilled in the support shaft of the twisting machine through the guide sheaves 6 and 7, and then passed through the twist stopper sheave 12 and the guide sheave 13 to the winder 14. The fin product 5 is twisted between the guide sheave 7 and the twist-stopping sheave 12 by rotating the driving electric motor 11 and revolving the reel 3 at the same time as the original installation. The revolution speed n of the reel 3 is controlled by the driving electric motor 11 at such a speed that the product speed V is detected by the anti-twist sheave 12 and the required lead pitch is achieved.

In addition, in cases where the cross-sectional shape is likely to collapse if the wrapping angle is made small, such as a tube, the guide sheaves 6, 7 and the anti-twist sheave 12 are
It is also possible to construct a repeating bending mechanism with a slight intermeshing in the bending mechanism, which enables twisting action and twist prevention in the same manner as described above.

As described above, the present invention applies torsion to the product between the guide sheave and the anti-twist sheave, so that the distance between the torsional supports can be kept constant at all times, so that the feed rate of the product and the revolution speed of the reel are If you control accurately, you can always obtain a uniform twist pitch, and if you want to change the twist pitch, you can adjust it to the desired pitch by simply controlling the reel's revolution speed.
It is also possible to increase or decrease the twist pitch within the same product, or to apply reverse twist.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing an example of a product with straight fins;
The figure is a perspective view showing an example of a product with torsion fins, Fig. 3 is a line side view of the device of the present invention, Fig. 4 is a schematic perspective view of the twisting machine, and Fig. 5 is a line side view showing a modified embodiment of Fig. 3. It is. 1... Twisting machine, 3... Reel, 4... Frame, 5... Fin product, 6, 7... Guide sheave,
8,9,10...Transmission mechanism, 11...Electric motor, 1
2...Twist sheave, 13...Lateral movement guide sheave, 14... Winder, 15... Arithmetic circuit.

Claims (1)

[Claims] 1. A twisting machine frame that removably and rotatably supports a fin tube or a reel wound with wire is provided with a guide sheave for guiding the product outside the machine, and , a twist preventing sheave is provided midway in the direction of movement of the product, and in the process of unwinding the product from the take-up reel, a twisting machine is rotated to revolve the take-up reel, thereby giving twist to the product between the two sheaves. A continuous metal twisting device characterized by: