JPH0771712B2 - Method and apparatus for manufacturing radiating coil - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for manufacturing a radiation coil suitable for use in a radiator for an electronic cooler, for example.

[0002]

2. Description of the Related Art Electronic control has become mainstream with the progress of semiconductors, and a control panel on the surface of a case containing the semiconductor has a device for cooling the heat emitted by the built-in semiconductor in order to maintain the function of the semiconductor. It is designed to be incorporated.
That is, the control panel incorporates an electronic cooler including an electronic heat exchanger using an electronic cooling element utilizing the Peltier effect.

For the purpose of improving the cooling effect on the heat radiating side of this electronic cooler, there is known a water cooling type cooling device in place of the air radiating side on the heat radiating side. Most of the radiators in this water-cooling type cooling device have a round radiating coil wound in a circular cross section fixed to the outer peripheral surface of a metal pipe through which cooling water circulates.

[0004]

However, in order to further improve the heat radiation efficiency in the radiator, the radiator is wound and formed in an elliptical cross section or a substantially rectangular shape whose heat radiation area is larger than that of a perfect circle. It is more efficient to use a flat radiating coil.

However, the manufacture of this flat radiating coil has the following problems, and the solution thereof has been desired. When a wire rod is wound around a core rod having a flat cross section, the product coil is not easily removed from the core rod. Therefore, the outer peripheral surface of the core rod 30 must be tapered as shown in FIG. Therefore, the finished diameter of the coil 31 is different between the winding start end side and the winding end side. As shown in FIG. 7, twisting due to the returning stress occurs in the product coil 31 after being removed from the core rod. Therefore, in order to correct this, a straightening step of setting it in a jig and applying heat to straighten it is necessary. Become.

The present invention has been made in view of the above circumstances, and in the manufacture of a flat radiating coil, the finished diameter of the coil is constant irrespective of the length, and a separate correction step is provided. It is an object of the present invention to provide a method and an apparatus for manufacturing a radiating coil that can always produce a straight product without twisting.

[0007]

In order to achieve the above object, the manufacturing method of the present invention is such that a wire rod is wound with a rotating core metal having an elliptical or substantially rectangular cross section to form a flat coil. It is characterized in that the flat coil is guided to a twist straightening portion provided in a part of the cored bar and twisted in a direction opposite to the twisting direction due to the return stress to straighten the twist.

In addition, a plurality of wire rods are wound in parallel with a rotating core metal having an elliptical or substantially rectangular cross section to integrally form a plurality of flat coils, and then the flat coil is attached to the core metal. The twist is straightened by guiding it to a twist straightening part provided in a part, which is twisted in the direction opposite to the twisting direction due to the return stress, and then the flat coil is removed from the core metal, except for one specific coil. The coil is rotationally displaced about the axis to cross each coil by a predetermined angle.

The manufacturing apparatus of the present invention includes a wire rod winding portion, a feed guide portion, and a wire rod winding portion each having an elliptical cross section or a substantially rectangular cross section.
A twisted straightening section and a receiving guide section are continuously provided in order, and a rotationally driven cored bar is installed on a shaft support.
The twist straightening portion and the receiving guide portion are formed with a diameter smaller than that of the wire rod winding portion, and the twist straightening portion is formed into a shape twisted by a predetermined angle in the direction opposite to the twisting direction due to the return stress acting on the wire rod. It is characterized by being.

[0010]

The flat coil formed by being wound in the winding portion of the rotating core metal is sequentially extruded and sent to the small-diameter feed guide portion, twist straightening portion and receiving guide portion. Then, the twist is naturally corrected while passing through the twist correction section,
It is formed in a straight shape.

[0011]

1 to 3 show an embodiment of the manufacturing apparatus of the present invention, in which two flat radiating coils 1a and 1b are wound at the same time and shown in FIGS. It is for making such a cross coil 1.

In FIGS. 1 and 2, reference numeral 3 denotes a guide portion for two wire rods 2a, 2b such as copper wires fed from a supply portion (not shown), which gives an appropriate tension to the wire rods 2a, 2b. So it has a braking function. That is, the wire rods 2a, 2
b is pinched between the receiving member 4 and the pressing member 5, and the pressing member 5 receives the acting force of the pressing spring 7 via the rod 6 and presses the wire rods 2a, 2b. Reference numeral 8 is an adjusting nut for adjusting the pressing force. It should be noted that the pressing member 5 has a felt attached to its surface, and the felt is moistened with water.

Reference numeral 9 denotes an aligned portion of the wire rods 2a and 2b, which is provided with a pair of guide discs 10a and 10b having a predetermined interval, and two wire rods 2a and 2b are provided between the guide discs 10a and 10b.
Are arranged in parallel.

Next, reference numeral 11 is a winding portion, and a shaft support 13 having a taper surface 12 for guiding the wire rods 2a, 2b from the aligning portion 9 and a shaft support 13 for supporting the drive motor 14
And a cored bar 15 that rotates by. The cored bar 15 includes a winding section 16 having an elliptical cross section provided at a position adjacent to the shaft support 13, and a feed guide section 17 having a slightly smaller diameter and an elliptical cross section and a straight shape. , The wire guides 17 have an elliptical cross section with the same diameter as the feed guide portion 17, and
A twist straightening portion 18 having a shape twisted by a predetermined angle in a direction opposite to the twisting direction due to a return stress acting on b, and the twist straightening portion 1
8 and a receiving guide portion 19 having the same diameter and an elliptical cross section and a straight shape are continuously formed in order.

In the present embodiment, the angle α of the tapered surface 12 of the shaft support 13 is 5.2 ° with respect to the vertical surface, and the twist angle of the twist correcting portion 18 is 390 ° (that is, one rotation + 30).
°) respectively.

The two wire rods 2a and 2b aligned in parallel at the aligning portion 9 are guided by the tapered surface 12 and sent to the winding portion 16 of the cored bar 15 in an inclined state, where they are wound into an elliptical shape. The two flat coils 1a and 1b are simultaneously rotated and integrally formed. Since the cored bar 15 is constantly rotating, the continuously formed flat coils 1a and 1b are sequentially extruded rightward in FIG. 1 to advance the feed guide portion 17 and be sent to the twist straightening portion 18. .

Since the twist correction portion 18 is twisted in the direction opposite to the twist direction due to the return stress, the coils 1a, 1
While advancing there, the twist is naturally corrected and sent to the receiving guide portion 19.

A flat coil 1a having a predetermined length,
1b is pulled out from the receiving guide portion 19. For example, in the case of the radiator heat radiation coil 1 shown in FIGS. 4 and 5, after the metal pipe 20 is inserted into the flat coils 1a and 1b, one coil 1b is rotated about the axis by a predetermined angle ( 4 and 5, 90 °) is rotationally displaced and crossed, and then fixed to the pipe 20 by soldering 21 or the like.

[0019]

According to the present invention, since the wire rod is wound in the winding portion of the rotating core metal to continuously form the flat coil, the finished diameter of the coil is the same regardless of the length. It is always constant over time. Moreover, there is no restriction on the length of the coil, and any long product can be manufactured with one core metal.

Further, even if a separate straightening step is not provided, the twist is naturally straightened while passing through the twist straightening portion of the core metal, and a straight coil can be easily manufactured.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the device of the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is a bottom view of the guide portion.

FIG. 4 is a front view showing an example of a heat dissipation coil manufactured according to the present invention.

5 is a view on arrow A in FIG. 4. FIG.

FIG. 6 is a perspective view showing an example of a conventional method for manufacturing a flat coil.

FIG. 7 is an external view showing a twisted state of a flat coil.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cross coil 1a, 1b Flat coil 2a, 2b Wire material 3 Guide part 9 Alignment part 11 Winding part 12 Tapered surface 13 Shaft support 14 Motor 15 Core metal 16 Winding part 17 Feed guide part 18 Twist straightening part 19 Receiving guide Department

Claims (3)

[Claims] 1. A flat metal coil is formed by winding a wire rod with a rotating core metal having an elliptical or substantially rectangular cross section, and the flat coil is provided in a part of the core metal, and the twisting direction due to a return stress is provided. A method for manufacturing a heat dissipation coil, which comprises guiding the twist to a twist straightening portion having a shape twisted in the opposite direction to straighten the twist. 2. A plurality of wire rods are wound in parallel to form a plurality of flat coils by a rotating core metal having an elliptical cross section or a substantially rectangular cross section, and then the flat coils are formed of a core metal. The twist is straightened by guiding it to a twist straightening part provided in a part, which is twisted in the direction opposite to the twisting direction due to the return stress, and then the flat coil is removed from the core metal, except for one specific coil. A method for manufacturing a heat radiating coil, characterized in that each coil is rotationally displaced about an axis to cross each coil by a predetermined angle. 3. A rotatably driven core metal having a wire rod winding portion, a feed guide portion, a straightening correction portion, and a receiving guide portion, which are formed in an elliptical or substantially rectangular cross section, respectively, and which are successively provided in this order. Installed on a table, the feed guide portion, the twist straightening portion and the receiving guide portion are formed to have a diameter smaller than that of the wire rod winding portion, and the twist straightening portion has a twisting direction due to a return stress acting on the wire rod. An apparatus for manufacturing a heat dissipation coil, which is formed in a shape twisted by a predetermined angle in opposite directions.