JP2556358B2 - Method and apparatus for simultaneously energizing two wires - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is applied to a case where a wire having poor flexibility is heated while being linearly traveled, or a heat treatment in a linear state is required. The present invention relates to a method and an apparatus for simultaneously energizing two wires which are suitable for a case of a small diameter.

(Prior Art and Problems) There are various methods of electrically heating while running a wire continuously, but they are roughly classified into an external power supply method and a ring transformer method.

The external power supply method is used when heating a wire with poor flexibility.
Alternatively, it is a method adopted when heat treatment in a linear state is required, and the basic type of the method will be outlined with reference to FIG.

As shown in the figure, a pair of roll electrodes RO1 and RO2 made up of rolls a and b whose circumferential surfaces face each other with the feed passage L1 of the wire W1 sandwiched therebetween are arranged at a predetermined interval, and each pair of roll electrodes RO1 and RO2 is provided. S roll one or both rolls (b in the figure)
It is configured to be connected to the power source E via a slider shown as. The traveling wire W1 consists of pairs of rolls a,
It passes while contacting the peripheral surface of b, and is resistance-heated between the pair of roll electrodes RO1 and RO2.

In the external power supply system, the roll a in which the slider S rotates,
Since power is supplied by contacting b, the drawback is that the wear of the slider S is severe. In addition, the running wire W is usually heated in a straight line while applying tension so as not to loosen between each pair of roll electrodes RO1 and RO2, but the wire W has a thin diameter of 3,4 mm or less. In the case of, the frictional resistance of the slider S is conspicuous, and meaningless traction force is required. That is, using the graph shown in FIG. 4 (b) with the traction force P on the vertical axis and the wire diameter d on the horizontal axis, the friction of the slider S must be maintained in order to keep the wire W in a straight state. A traction force P that is the sum of a constant traction force p ₁ corresponding to the resistance and a traction force p ₂ that increases corresponding to the wire diameter d is required. Therefore, in the large-diameter wire rod W, p ₂ is extremely large, and the proportion of p ₁ is very small, which is unsatisfactory. However, as the diameter of the small-diameter wire rod W increases, the proportion of p ₂ occupies. As the size of the slider S increases, energy loss and equipment loss due to the presence of the slider S are regarded as problems.

 Next, the lithog transformer system will be outlined with reference to FIG.

As shown in the figure, the first conductive sheave ES1 is arranged so that the wire feed passage L'is tangent, and the second conductive sheave ES1
2 is arranged on the same plane as the first sheave ES1 at a position separated from the wire rod feed passage L ', and the wire rod W'is provided on both sheaves ES.
The inner iron type transformer indicated as T'is made to contact each half-circumferential surface of each ES1 and run so as to form one loop or a plurality of loops. One of the two (ta in the figure) is arranged, and power is supplied to the annular transformer T ′ from a power source (not shown) to heat the wire by the secondary current i induced in the wire W ′ forming the loop. .

The ring transformer method has a fatal drawback that it cannot be applied except when the wire W'has flexibility.

(Object of the Invention) The present invention has been made in order to overcome the problems of the conventional external power supply method and the ring transformer method, and has a poor flexibility, or a wire which is required to be heat-treated in a straight state. Is capable of heating without using a slider, and is capable of high-efficiency heating in which two wire rods are processed in parallel at the same time. Particularly, it is possible to provide a method and an apparatus for simultaneously energizing two wire rods which are suitable for small-diameter wire rods. To aim.

(Summary of the Invention) A summary of the present invention is that, in the case where a wire is heated linearly while running linearly, the two wires are made to travel so as to simultaneously pass through a magnetic path oriented in opposite directions. Before and after passing through the magnetic path, the two wire rods are simultaneously connected by setting them so that a closed loop is formed by electrically connecting each wire rod through the electrode wheel that rotates while contacting each wire rod. To heat.

(Example 1) The present invention will be described in detail below with reference to an example apparatus shown in FIGS. 1 (a) and 1 (b).

In FIG. 1 (a), W1 and W2 are wire rods that travel in the same direction at the same speed while maintaining a predetermined distance on a predetermined plane.

11 to 18 are electrode wheels, and electrode wheels 11 and 12, 13 and 14, 15 and 1
Each of 6, 6 and 17 and 18 is pivotally attached to each of shaft members 21 to 24 which can be axially rotated at an interval equal to the interval between the wire members W1 and W2. The electrode wheels that are pivotally attached to the shaft members 21 to 24 are electrically connected to each other, for example, by connecting them with a conductive material or by making the shaft material itself a conductive material.
A set of composite electrode wheels A to D are formed.

The above four sets of composite electrode wheels A to D are 2 like A and B, C and D.
Each pair is placed as a pair at a predetermined distance,
Each pair sandwiches the traveling wires W1 and W2, respectively, and is rotatable according to the arrows. Wires W1 and W2
Is conductive, the wires W1 and W2
The specified length range is for the composite electrode wheel A, B and the composite electrode wheel.
A closed loop is electrically formed via C and D.

Reference numeral 30 is a transformer device capable of simultaneously forming magnetic paths directed in opposite directions. The transformer device 30 is composed of an outer iron type transformer having an iron core 31 in the shape of glasses, and the primary coil 32 wound around the connecting portion 311 is wound in two, for example, as shown in the drawing. A predetermined range of spaces (a) and (b) penetrating the surfaces are ensured.

The transformer device 30 is arranged at an intermediate position between the pair of composite electrode wheels A and B and the pair of composite electrode rings C and D which are arranged at a predetermined distance. Thus, by setting the specifications to the predetermined values, it is possible to use the spaces a and i in the above-mentioned predetermined ranges secured in the two holes as the passages of the wire rods W1 and W2, respectively.

The case where the wire rods W1 and W2 are electrically heated using the above apparatus will be described below.

Not shown, for example, turn on the power of commercial frequency and predetermined output
As a result, the primary coil 32 is energized.

By energizing the primary coil 32, if the iron core 31 is caught at a certain moment, as shown by the dashed-dotted line in FIG. The paths Φ1 and Φ2 are formed. The magnetic path Φ1
And Φ2 are generated, wire rods W1 and W that pass through spaces a and a in a predetermined range provided in each of the two holes of the transformer device 30.
Secondary voltages in opposite directions are induced in each of the two magnetic paths Φ1 and Φ2 according to the directing directions. Wire material W1, W2
Since each forms an electrically closed loop via the paired composite electrode wheels A and B and the paired composite electrode wheels C and D as described above,
The voltage induced in the wire W1 is: W1 → Pair of composite electrode wheels A, B
→ Wire W2 → Pair of composite electrode wheels C, D → Secondary current flowing in the drawing direction with wire W1 is generated, and the voltage induced in wire W2 is
Wire W2 → Composite electrode wheel C, D → Wire W1 → Composite electrode wheel A, B →
Illustration of flowing wire W2 Produces a directional secondary current.

In other words, the voltage induced in the wire W1 causes the wire W2 to return, and the voltage induced in the wire W2 causes the secondary current to return to the wire W1.

Therefore, each of the wire rods W1 and W2 simultaneously generates resistance heat due to the generated secondary current, and reaches a predetermined temperature while simultaneously traveling at a predetermined speed between the pair of composite electrode wheels A and B and the pair of composite electrode wheels C and D. Be heated.

(Example: 2) Another example of the present invention is shown in FIG.

Unlike the case of the above-mentioned embodiment 1, the wire rods W1 and W2 in the figure run at the same speed in opposite directions while maintaining a predetermined distance on a predetermined plane.

Each of E and F is an electrode wheel device which is arranged at a predetermined distance, and is composed of an electrode wheel shown as 4 and two auxiliary wheels shown as 5. The electrode wheel 4 has an outer diameter capable of making contact with the wire rods W1 and W2 traveling in opposite directions at a predetermined interval on the circumferential surface 180 ° apart, and rotates in the direction of the arrow as the wire rods W1 and W2 travel. It is possible to move. The auxiliary wheel 5 is freely rotatable and is arranged outside the position where the wire rods W1 and W2 are in contact with the electrode wheel 4, and the wire rods W1 and W2 are set to be able to run while being in close contact with the electrode wheel 4. .

30 is the same transformer device used in Example 1. However, the primary coil 32 wound around the connecting portion 311 is not divided into two, and a predetermined range of spaces a and a penetrating between both end faces is secured in the upper part of the drawing, and accordingly, the traveling paths of the wire rods W1 and W2 are deviated. However, only the other examples of forming the spaces a and b are shown, and the action of forming a magnetic path oriented in the opposite directions is exactly the same as in the case of the embodiment 1.

In the device configured as described above, the wire rods W1 and W2 each form an electrically closed loop via the electrode wheel devices E and F. Therefore, if power is supplied to the primary coil 32 from a power source (not shown), the wire rods W1 and W2 are induced. The secondary current flows through the wire W2 as a return line, and the secondary current induced by the wire W2 flows through the wire W1 as a return line, which flows through the closed loops. Be heated.

(Embodiment: 3) The side view shown in FIG. 3 uses the paired composite current wheels A and B, but as a transformer device capable of simultaneously forming magnetic paths directed in opposite directions, The case where a structure different from that of the case is used is shown.

In this embodiment, a transformer device 300 having two inner iron type transformers shown as 6 and 7 as constituent members is used.
Both transformers 6 and 7 can cooperate to form a magnetic path that points in the opposite direction at the same time. That is, the cores 61 and 71 of the transformers 6 and 7 have the same shape, and the primary coils 62 and 72 wound around the cores 61 and 71 are connected to the same power source (not shown), but the winding direction is Both are said to be reciprocal.

Therefore, the voltages induced in the wire rods W1 and W2 that pass through the annulus of the transformers 6 and 7 become voltages of opposite phases, and the secondary current that occurs with this is also in the opposite direction in the wire rods W1 and W2. Therefore, in exactly the same manner as in Example 1, the other wires flow back to each other and the secondary wires W1 and W2 are simultaneously heated.

The transformer device 300 connects the wire rods W1 and W2 to the electrode wheel device E,
It is of course also used when forming an electrically closed loop via F.

The primary coils 62 and 72 wound around the iron cores 61 and 71 of the transformers 6 and 7, respectively, are wound so as to maintain symmetry in a plurality of circumferential directions around the wire rod passage so that electromagnetic force is not biased in the circumferential direction. The above consideration does not cause vibration in the traveling wire rod, and thus eliminates the possibility that the wire rod will burn due to contact with the primary coils 62 to 72.

(Operation of the invention) The present invention is an operation capable of heating a wire rod in a straight line state without using a slider, which is conventionally required by an external power supply method, and further, the two wire rods are separated from each other across a predetermined section. It has the effect of simultaneously generating a secondary current that causes a return and heating it, and further has the effect of reducing the traction force when the wire is heated in a straight state.

(Effects of the Invention) The present invention does not adopt the conventional ring transformer method because of its poor flexibility, or the heating under the linear condition of the wire which is forced to undergo the heat treatment during the straight running is regarded as a consumable item. Since it can be performed without using the positioned slider,
The loss time required for replacing the slider is eliminated and running costs are greatly reduced.

Moreover, the present invention is the simultaneous heating of the two wire rods, and therefore the double amount of the wire is treated in the same time as the conventional method, in other words, the same amount is processed in half the time, and the productivity is improved. To dramatically improve. This means that the wire diameter is 2-3 mm, for example.
This is noticeable when a wire or the like having a low degree of flexibility and material, such as a stainless steel, is subjected to heat treatment such as quenching and tempering. The reason is that one coil with a wire diameter of 2 mm has a length of 40 Km / ton, and one coil with a wire diameter of 3 mm has a load of 18 Km / ton, and the time required for heat treatment while running one coil is extremely long. Time: For example, 1 coil runs at a wire speed of 1 m / s
When processing with ec, the processing time is almost 11 when the wire diameter is 2 mm.
When the time and wire diameter are 3 mm, the processing time is about 5 hours, but the effect of the present invention capable of processing twice the amount of the conventional method within the same time is great.

In addition, as the wire diameter becomes smaller, it is possible to omit the traction force corresponding to the frictional resistance of the slider, which is considered to be unnecessary for the heat treatment directly. Therefore, the traction equipment can be small and energy loss can be reduced. In addition, the traveling speed control becomes extremely easy, and in combination with the above productivity, the present invention can exert a particularly remarkable effect on the heating of the thin wire.

Of course, it goes without saying that the present invention can be applied to other component systems or large-diameter wire rods.

[Brief description of drawings]

1 (a) and 1 (b) are respectively a perspective view and a partial side view of an embodiment according to the method of the present invention, FIG. 2 is a perspective view of another embodiment according to the method of the present invention, and FIG. 3 is an apparatus according to the present invention. FIG. 4 (a) is a side view showing another example of the transformer device used by
And (b) are a front view of a basic conventional external power supply system device and a traction force-wire diameter relationship diagram for explaining the problems, and FIG. 5 is a front view of a conventional ring transformer system device example. W1, W2 …… Wire rods Φ1, Φ2 …… Magnetic paths that are oriented in opposite directions A to D …… Composite electrode wheel E, F …… Electrode wheel device 11 to 18,4 …… Electrode wheel 21 to 24 …… Shaft 30,300 …… Transformer 31,61,71 …… Iron core 311 …… Coupling 32,62,72 …… Primary coil 5 …… Auxiliary wheel 6,7 …… Inner iron type transformer

Claims (6)

(57) [Claims] 1. When a wire is heated linearly while running linearly, the two wires are made to travel so as to simultaneously pass through a magnetic path oriented in opposite directions, and before and after passing through the magnetic path. It is characterized in that two wire rods are simultaneously heated by setting each wire rod to be electrically connected via an electrode wheel that rotates while being in contact with each wire rod so that a closed loop is formed. Method for simultaneously energizing two wires. 2. An apparatus for simultaneously heating two wire rods while maintaining a predetermined space on a predetermined plane and traveling in the same direction at the same speed, and having two electrode wheels equal to the space between the traveling wire rods. A pair of composite electrode wheels that are pivotally attached to a shaft member that is rotatable about an axis and are electrically connected to each other, and a transformer device that can simultaneously form magnetic paths in opposite directions, Two pairs of the composite electrode wheels are arranged as a pair, and the pair of composite electrode wheels are arranged so as to sandwich each of the wire rods traveling at a predetermined distance. The transformer device is arranged between the two pairs of the composite electrode wheels. The two-wire simultaneous-current heating device is characterized in that the inside of the magnetic path is a wire path. 3. A device for simultaneously heating two wire rods running at the same speed in opposite directions while maintaining a predetermined distance on a predetermined plane, and in contact with each wire rod traveling on the circumferential surface 180 degrees apart. A pair of electrode wheel devices each comprising a rotatable electrode wheel having a possible outer diameter and a rotatable auxiliary roll for crimping each wire to the electrode wheel, and a magnetic path oriented in opposite directions at the same time. It is characterized in that it is provided with a possible transformer device, the electrode wheel mounting device is arranged at a predetermined distance, and the transformer device is arranged between the electrode wheel mounting device and each magnetic path is a wire rod passage. Dual wire simultaneous energization heating device. 4. The two-wire material simultaneous energization heating device according to claim 2, wherein the transformer device capable of simultaneously forming magnetic paths oriented in opposite directions is an outer iron type transformer. 5. A transformer device capable of simultaneously forming magnetic paths oriented in opposite directions is two inner iron type transformers, each primary coil of which is connected to the same power source as mutually opposite windings. The two-wire material simultaneous-current heating device according to claim 2 or 3, characterized in that. 6. The primary coil wound around an annular transformer is circumferentially symmetric with respect to a wire passage in a plurality of directions.
The two-wire material simultaneous energization heating device described.