KR20090116031A - Apparatus for drawing out welding wire - Google Patents

Abstract

PURPOSE: An apparatus for drawing out welding wires is provided to prevent two or three wires from being withdrawn together. CONSTITUTION: An apparatus for drawing out welding wires comprises a pressing plate(32) and magnetic member(53). The pressing plate pressurizes the welding wire accommodated in a pail pack. The magnetic member is positioned on one side of the pressing plate. The magnetic members are arranged in a radial shape in order to exclude mutual magnetic force. The magnetic members are arranged in three or more places. The magnetic members are connected by a connection member(50). The lower part of the magnetic members covers the pressing plate.

Description

{Apparatus for drawing out welding wire}

The present invention relates to a wire drawing jig for welding, and more particularly, by providing a magnetic material on the top of the drawing jig to prevent the variation and increase of the drawing resistance at the time of drawing out the welding wire, and the wire is entangled due to entanglement of the wire. The present invention relates to a welding wire drawing jig for preventing the phenomenon of pulling out three strands and bundles at the same time.

In general, a welding wire fail pack has a large amount of welding wire wound inside a coil to be stacked and stored therein.At this time, the winding wire is straightly straightened, and then a coil winding width is fixed upward from the bottom of the fail pack. It is stacked sequentially with.

Here, when winding by laminating by one coil, the principle of winding by applying a twist of 360 ° per coil to a straight-corrected wire is applied, and a continuous coil is wound in a state in which the twist around 360 ° is inherent in one coil And stacked.

As described above, the welding wire wound on the fail pack has a tendency to always spring or fall in the axial direction of the fail pack because the welding wire is twisted within a range of elastic limits.

In addition, the welding wire is difficult to be drawn out without a drawback disorder such as tangling or twisting as the torsional stress is naturally solved at the time of drawing because the internal stress inherent is irregular during processing.

Therefore, the welding pack fail pack is required to take out the jig in order to smoothly withdraw the wire wound inside and laminated stacked.

On the other hand, the conventional take-out jig is provided in a circular shape, it is placed on the upper winding layer with a constant weight, as the wire winding layer is consumed, the take-out jig of the method is naturally lowered downward by the weight of the take-out jig.

BRIEF DESCRIPTION OF THE DRAWINGS It is a top view which shows an example of the winding width formation by which the welding wire is wound in a loop shape.

As shown in FIG. 1, the winding layer of a conventional fail pack in which a conventional drawing tool as described above is used has loops 150 continuously by one coil while having an eccentricity of a predetermined interval in the axial direction of the fail pack barrel. It is stacked in a flower pattern to form a winding width of a certain size.

At this time, the winding layer formed as described above can be seen that the diameter of one loop is laminated over the outer diameter 130 and the inner diameter 110 of the winding width.

Therefore, when being drawn out by the circular drawing out jig, the trajectory from which the coil of one loop length is drawn out is changed, and the drawing resistance is also irregular.

As the winding method of the welding wire is made as described above, in the case of the loop drawn out near the edge of the outer diameter 130 side of the fail pack at the winding width, the wire tends to be pulled out of another loop so that the wire is entangled.

In addition, the outer diameter 130 side edge and the inner diameter 110 side edge of the winding width formed by the first loop 150 increase the angle and resistance drawn out by the circular extraction jig, which causes the wire drawout obstacle, Deformation in the wire may cause deformation of the wire in the supply path.

As described above, the conventional draw-out jig used for a conventional fail-pack in which the coils 150 are stacked in a flower pattern and the winding layer is formed has a welding wire due to the irregular stress and twist angle inherent in the wound wire. There was a problem that the entangled, the wound coil bounces or flows into two or three strands or bundles.

In addition, the conventional drawing jig is provided with a circular drawing jig to change the trajectory of the coil is drawn out when the welding wire is drawn out, there is a problem that the draw resistance is irregular.

In addition, since the withdrawal resistance is irregular, such as fluctuation and increase as described above, there is a problem that the supply failure of the wire does not occur smoothly supplied with the wire.

In order to solve the above problems, the present invention is provided with a magnetic material on the top of the extraction jig to prevent the variation and increase of the extraction resistance during the extraction of the welding wire, the wire is entangled by 2-3 strands and at the same time An object of the present invention is to provide a welding wire take-out jig for preventing the phenomenon of pulling out bundles.

이고, 상기 반발력은 와이어 인장응력 × 와이어 단면적 × 와이어 권체구속도이다.In order to solve the above problems, the welding wire extraction jig of the present invention is a pressure plate for pressing the upper winding layer of the welding wire accommodated in the fail pack; It is provided on one side of the pressure plate and comprises a magnetic material having a predetermined interval in the winding direction of the winding layer, the magnetic material is a suppression force for controlling the one loop of the wire drawn out by its magnetic force and the wire withdrawn from the winding layer The relationship between the ratio (repression force / repulsion force) of the repulsive force of one loop of satisfies 1.2 ≦ suppressive force / repulsive force ≦ 3.7. Here, the restraining force is the mean magnetic force ×

The repulsive force is wire tensile stress x wire cross-sectional area x wire winding sphere speed.

In addition, the magnetic body is disposed radially, it is preferable that the lower surface of the magnetic body is covered by the base material of the pressure plate so as not to be in direct contact with the welding wire. Furthermore, a plurality of the magnetic body is arranged radially so that mutual magnetic force is excluded, preferably at least three or more positions. In addition, the magnetic body may include a plurality of magnetic bodies connected to each other by a connecting member, and the lower surface of the magnetic bodies may be disposed to be covered by the base material of the pressing plate. Here, it is preferable that a coupling means corresponding to the magnetic set is provided on the pressing plate so that the magnetic set can be separated and coupled with the pressing plate. On the other hand, the magnetic body is preferably disposed so that the center of the magnetic body is located in the center circle that is equal to 1/2 equal to the width of the pressure plate original plate. In addition, the magnetic body is preferably disposed such that the center of the magnetic body in the outer diameter direction of the pressing plate in the center circle of the width of the pressure plate. In addition, the magnetic material is preferably provided with a neodymium magnet (Nd-Fe-B) among rare earth magnetic materials to be used semi-permanently.

Referring to the effect of the wire extraction jig for welding according to the present invention described above are as follows.

First, by applying the relation between the suppression force of the magnetic body disposed on the upper part of the pressure plate and the repulsive force of the wire 1 loop drawn out (inhibition force / repulsion force) to 1.2 ≤ suppression force / repulsion force ≤ 3.7, It is possible to prevent the increase and to maintain the withdrawal resistance uniformly.

Second, since the draw resistance can be maintained uniformly, it is possible to prevent wire entanglement caused by the phenomenon that the wire is drawn out at the same time in bundles, and in detail, prevents the wound wire from bouncing or dripping into two or three strands or bundles. can do.

Third, since the drawing resistance can be maintained uniformly, not only the wire is drawn out smoothly, but also the feeding problem of the wire can be remarkably increased by preventing the supply interruption of the wire.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the welding wire extraction jig according to the present invention.

Figure 2 is a perspective view showing a wire extraction jig for welding according to the first embodiment of the present invention.

As shown in Figure 2, the welding wire withdrawal jig 10 according to the first embodiment of the present invention pressurized the upper portion of the winding layer in a fail pack that accommodates the winding layer in a state in which the welding wire is wound therein The pressing plate 11 having a predetermined weight is provided in a hollow disc shape corresponding to the upper surface of the winding layer.

In addition, one side of the pressing plate 11 is provided with a magnetic body 13 disposed on the inside or the upper portion of the pressing plate 11 at regular intervals in the winding direction of the winding layer so that magnetic force acts on the upper portion of the winding layer. desirable.

이고, 상기 반발력은 와이어 인장응력 × 와이어 단면적 × 와이어 권체구속도이다.At this time, the magnetic body 13 has a relation between a suppression force for controlling the one loop of the wire drawn out of the fail pack and a repulsion force of the one loop of the wire drawn out from the winding layer by the magnetic force thereof. Disposed to satisfy ≤ 3.7. Here, the restraining force is the mean magnetic force ×

The repulsive force is wire tensile stress x wire cross-sectional area x wire winding sphere speed.

Here, the repulsive force refers to the force that the wire 1 loop drawn out from the fail pack is to spring up or fall in the axial direction of the fail pack, and the repulsive force is the tensile load of the wire 1 loop drawn by a number of withdrawal tests (kgf). ) And the fail pack acts in proportion to the degree of restraint received when the wire is wound.

That is, the repulsive force is defined as the force repulsed by the wire 1 loop drawn out from the fail pack, and the wire tensile stress (kgf / mm ² ) It can be represented by the tensile load (kgf) which is a value calculated from × wire cross-sectional area (mm ² ) × wire winding sphere speed (constant).

Here, the degree of restraint corresponds to 1.0 when the inner diameter of the fail pack container to be wound is 530 mm or less and 0.7 when the inner diameter is 600 mm or more.

It was confirmed by a number of draw tests that the wires subjected to twisting stress after being processed and corrected to the same wire diameter were inversely proportional to the size of the diameter of the storage container.

만큼의 평균자력을 받아 상기 반발력을 제어하는 자력을 말하고, 상기 평균자력은 배치되는 각각의 상기 자성체(13)에서 측정되는 최대자력값의 평균치이고, 상기 자성체개수는 상기 가압판(11)에 배치되는 자성체(13)의 개수이다.In addition, the suppression force is the one loop of the wire drawn out from the fail pack

Refers to a magnetic force for controlling the repulsive force by receiving an average magnetic force, the average magnetic force is the average value of the maximum magnetic force value measured in each of the magnetic body 13 is disposed, the number of magnetic body is disposed on the pressure plate 11 It is the number of the magnetic bodies 13.

Here, the maximum magnetic force value is the maximum value of the measured magnetic force values in consideration of the difference in the magnetic force values according to the measurement portions of one magnetic body (one magnetic body). At this time, the magnetic force value of the magnetic body 13 is a value measured from the surface in which the pressure plate 11 is in contact with the winding layer, the unit is mT (millitesla).

로 구해지는 값이다.That is, the restraining force is defined as a force for controlling the repulsive force of the loop 1 of the wire for smooth feeding of the wire drawn out from the fail pack, and an average magnetic force ×

Is the value obtained by.

에 해당하는 힘만큼 받으면서 인출됨을 시험을 통하여 규명하였다.Here, the basis of the restraint force is that one loop is wound with eccentricity, and therefore the restrained force is the mean magnetic force ×

The test revealed that the drawer was drawn with the power corresponding to.

의 계산값에 따른 상기 억제력의 계산값이 산출되는 실시예를 하기의 표 1를 통하여 명시하도록 한다.The measured value of the average magnetic force as described above

An embodiment in which the calculated value of the suppression force is calculated according to the calculated value of is given through Table 1 below.

Table 1 is an embodiment showing the calculated value of the inhibitory force obtained by multiplying the mean magnetic force and the square root of the number of magnets after obtaining the square root of the measured value and the number of magnets.

On the other hand, the magnetic body 13 is preferably arranged so that the relationship between the ratio of the above-described suppression force and the repulsive force (suppression force / repulsive force) satisfies 1.2 ≤ suppression force / repulsive force ≤ 3.7, wire withdrawal according to the value of this suppression force / repulsive force The states are specified in Table 2.

The pull-out test of Table 2 shows that when the wire diameter of the wire is 0.9 to 1.2φ, the diameter of the fail pack is 505 mm, and after the winding has a weight of 300 kg, and the wire diameter is 1.4 to 1.6φ, the fail pack After the winding having a diameter of 660 mm and a weight of 450 kg, the deformation or entanglement of the wire was evaluated at the time of wire extraction.

That is, the wire is wound so as to have a curve at an angle of 360 ° when accommodated inside the fail pack, and when the wire diameter of the wire is increased, its rigidity is increased to increase the withdrawal resistance, so that the diameter corresponding to the wire diameter of the wire is increased. It is necessary to alleviate the bending angle of the wire by having the fail pack having a. In addition, since the diameter of the fail pack is changed so that the capacity of the winding layer is changed, the weight of the winding layer is also different.

As shown in Table 2, in Examples 4 to 5, Example 9, Examples 11 to 12, Example 15 and Examples 17 to 18, the value corresponding to the ratio of the inhibitory / repulsive force of the present invention is less than 1.2. Tangles occurred in the wire drawing test. That is, since the suppression force of the magnetic body 13 is relatively low compared to the repulsive force of the wire drawn out from the fail pack, the pullout resistance of the wire increases, thereby causing entanglement.

Further, in Examples 1 to 3, Examples 6 to 8, Example 10, Examples 13 to 14, and Example 16, the value of the wire bending test in the wire drawing test, because the value corresponding to the ratio of the suppression force / repulsion force exceeded 3.7. Deformation occurred. That is, the repulsive force of the magnetic body 13 is too strong relative to the repulsive force of the wire drawn out from the fail pack, causing plastic deformation of the wire upon withdrawal, causing poor feeding of the wire and welding defects of the meander beads. .

Further, in the case of Inventive Example 6, Inventive Example 12, Inventive Example 19, Inventive Example 26 and Inventive Example 33, the inhibitory / repulsive force value was 1.2, so that the behavior of the wire was stable and the drawing was good. In addition, in the case of Inventive Example 1, Inventive Example 7, Inventive Example 13, Inventive Example 20, and Invention Example 27, the withdrawal force / repulsive force value was 3.7, showing good withdrawal, Inventive Examples 2-5, Inventive Examples 8-11, Inventive Example Also in the case of 14-18, Inventive Examples 21-25, and Inventive Examples 28-32, the wire behavior with which the value corresponding to the ratio of the suppression force / repulsion force is more than 1.2 and less than 3.7 is stable and no wire entanglement occurs.

Therefore, unlike the case of the above embodiment, when the value of the suppression force / repulsion force is 0.9 to 1.6φ of the wire within the range of 1.2 to 3.7, the wire drawn out from the fail pack does not generate deformation or entanglement, and thus is stably drawn out. do.

Here, the wire drawn out at a ratio of the ratio of the suppression force / repulsion force to 1.2 or more was more stably drawn due to the reduction of the surface scratch. Therefore, it is preferable that the value of the said suppression force / repulsion force consists of 1.2 or more and 3.7 or less.

On the other hand, the magnetic body 13 is preferably provided in the interior or the upper portion of the pressing plate 11, and may be further attached to the upper surface of the pressing plate 11, is inserted into the upper portion of the pressing plate (11). May be

In addition, the magnetic body 13 is disposed radially, it is preferable that the lower surface portion of the magnetic body 13 is covered by the base material of the pressing plate 11 so as not to be in direct contact with the welding wire. Therefore, it is possible to prevent the wire from directly adhering to the magnetic body 13, thereby removing a factor that impedes supplyability due to the drawing resistance.

In addition, the magnetic body 13 is provided with a plurality of radially so as to exclude the mutual magnetic force, it is preferably arranged in at least three or more positions. That is, since the N pole and the S pole exist in one magnetic body 13, when two or more magnetic bodies 13 are disposed, the magnetic force of the magnetic body 13 is effectively removed by excluding the action of the repulsive force exerted by the same poles. To work.

On the other hand, the extraction jig 10 may be provided in a variety of materials, regardless of the material, such as synthetic resin, steel, paper, wood.

According to the various materials as described above, the magnetic body 13 may be provided in the upper portion of the pressing plate 11 of the extraction tool 10, and may be provided by welding and adhesion.

In addition, the magnetic body 13 as described above is provided on the upper portion of the pressure plate 11 so as not to be in direct contact with the welding wire, wherein the magnetic body 13 is half of the width of the original plate 11 of the pressure plate 11 It is preferable that the center of the magnetic body 13 is disposed in the center circle to be located.

Further, the magnetic body 13 is preferably disposed such that the center of the magnetic body 13 is located in the outer diameter direction of the pressure plate 11 in the center circle of the width of the pressure plate (11).

Therefore, when the wire is withdrawn from the fail pack, the problem of withdrawal resistance due to the magnetic force of the magnetic body 13 is solved, and the wire is not withdrawn in two or three strands or bundles, thereby preventing the wire from flowing down. can do.

As described above, the relation between the suppression force of the magnetic body 13 disposed inside or on the pressing plate and the repulsive force (resistance / repulsive force) of the one loop of wire drawn out from the fail pack is 1.2 ≦ suppressive force / repulsive force ≦ 3.7 By applying to, it is possible to prevent the deformation of the welding wire during the withdrawal of the welding wire in the fail pack container, it is possible to prevent the variation and increase of the withdrawal resistance to maintain the withdrawal resistance uniformly.

In addition, the drawing resistance can be maintained uniformly, thereby preventing the wire from being drawn out in two or three strands or bundles at the same time due to entanglement of the wire. You can increase it.

On the other hand, in the extraction jig 10 according to the present invention as described above, the magnetic body 13 is preferably provided as a rare earth magnet as a permanent magnet, more preferably, it is provided as a neodymium magnet among rare earth magnets. That is, the magnetic material 13 is provided as a neodymium magnet (Nd-Fe-B) among rare earth magnetic materials to be used semi-permanently.

3 is an exploded perspective view showing a wire drawing jig for welding according to a second embodiment of the present invention, FIG. 4 is a plan view showing a wire drawing jig for welding according to a second embodiment of the present invention, and FIG. AA line cross-sectional view.

As shown in Figures 3 to 5, the welding wire withdrawal jig 30 according to the second embodiment of the present invention is the upper portion of the winding layer in the fail pack in which the winding layer of the welding wire wound state is stored inside Is pressed by its own weight, and the pressing plate 32 is provided in the shape of a hollow disk corresponding to the upper surface of the winding layer.

At this time, the pressure plate 32 corresponds to the upper surface of the winding layer, a plurality of magnetic bodies 53 are connected by the connecting member 50 in the winding direction of the winding layer is provided as a magnetic set.

Here, the connecting member 50 is connected to one side of the connection rod 51 and the connection rod 51 connected to one side of the magnetic body 53, the connection ring for connecting the magnetic body 53 in one set It is preferred to include (52).

As described above, the plurality of magnetic bodies 53 are connected by the connection member 50 to be provided as one magnetic set, and the magnetic set may prevent the magnetic body 53 from directly contacting a welding wire. The lower surface portion of the magnetic body set is disposed to be covered by the base material of the pressing plate 32.

At this time, the magnetic body set is arranged in six places in the circumferential direction corresponding to the upper surface of the pressure plate 32, the magnetic body 53 has a predetermined interval, it is preferably provided connected to the connecting member (50) In the circumferential direction, at least three places may be disposed and connected to each other by the connection member 50.

In addition, the pressing plate 32 may be provided with a rounding part 34 on the inner diameter side and the outer diameter side so that the wire may be smoothly drawn out.

On the other hand, the magnetic body set may be attached to the upper surface of the pressure plate 32, it may be inserted into the pressure plate 32 and may be provided integrally with the pressure plate (32).

In addition, the take-out jig 30 may be provided in a variety of materials, regardless of the material, such as synthetic resin, steel, paper, wood.

According to the various materials as described above, the magnetic body set may be provided in the upper portion of the pressing plate 32 of the extraction tool 30, and may be provided by welding or adhesion.

On the other hand, the magnetic body 53 of the magnetic body set as described above is provided in the upper portion of the pressure plate 32 so as not to be in direct contact with the welding wire, wherein the magnetic body 53 is half of the width of the original plate It is preferable that the center of the magnetic body is disposed in the center circle to be located.

Further, the magnetic body 53 is preferably disposed such that the center of the magnetic body 53 is located in the outer diameter direction of the pressure plate 32 in the center circle of the width of the pressure plate (32).

이고, 상기 반발력은 와이어 인장응력 × 와이어 단면적 × 와이어 권체구속도이다.On the other hand, the magnetic body 53 has a relation between the suppression force for controlling the one loop of the wire drawn out of the fail pack and the repulsive force of the one loop of the wire drawn out from the winding layer by the magnetic force thereof. Disposed to satisfy ≤ 3.7. Here, the restraining force is the mean magnetic force ×

The repulsive force is wire tensile stress x wire cross-sectional area x wire winding sphere speed.

As described above, the relation between the suppression force of the magnetic body 53 disposed above the pressing plate 32 and the repulsion force (repression force / repulsion force) of the wire 1 loop drawn out from the fail pack is 1.2 ≦ restrain force / repulsive force ≦ By applying to 3.7, it is possible to prevent deformation of the welding wire at the time of withdrawing the welding wire in the fail pack container, and to maintain the withdrawal resistance uniformly by preventing the variation and increase of the withdrawal resistance.

In addition, the drawing resistance can be maintained uniformly, thereby preventing the wire from being drawn out in two or three strands or bundles at the same time due to entanglement of the wire. You can increase it.

The relation between the suppression force of the magnetic body 53 disposed above the pressing plate 32 as described above and the ratio (suppression force / repulsion force) of the repulsive force of the one loop of wire drawn out of the fail pack is 1.2 ≦ suppressive force / repulsive force ≦ 3.7 An embodiment that can prevent deformation or entanglement of the wire by applying to is described through Table 2 in the part described with reference to FIG. 2.

6 is an exploded perspective view showing a wire drawing jig for welding according to a third embodiment of the present invention.

First, the welding wire drawing jig 60 according to the third embodiment of the present invention is a pressing plate (a) in the welding wire drawing jig 30 according to the second embodiment of the present invention described with reference to FIGS. 3 to 5. 32) The magnetic wire 53 is connected to the magnetic body set by the connecting member 50 on the upper surface is provided with a coupling means to be separated and combined with the wire extraction jig 30 for welding according to the second embodiment of the present invention and The same parts will be omitted in the description.

As shown in Figure 6, the welding wire withdrawal jig 60 according to the third embodiment of the present invention is the magnetic body 53 is connected to the upper surface of the pressure plate 62 by the connecting member 50 is separated and set Coupling means are provided to enable coupling.

At this time, the coupling means is formed to protrude on the upper surface of the pressure plate 62, it is preferable that the coupling groove 66 is coupled to the magnetic body set to correspond to the magnetic body set.

Here, the coupling groove 66 may be provided with the same height as the height of the magnetic set protruding as a coupling means to which the magnetic set is coupled, may be provided smaller than the height of the magnetic set to facilitate attachment and detachment. have.

Hereinafter, the magnetic body set is provided on the pressing plate 62 of the welding wire extraction jig 60 according to the third embodiment of the present invention to prevent deformation or entanglement of the wire when the wire is taken out from the fail-pack for welding wire. Exemplary embodiments are described through Table 2 in the part described with reference to FIG. 2.

 Welding wire extraction jig according to the third embodiment of the present invention is the ratio of the suppression force of the magnetic body 53 disposed on the pressing plate 62 and the repulsive force of the wire 1 loop drawn out from the fail pack (suppression / repulsive force) By applying the relationship of 1.2 ≤ suppression force / repulsive force ≤ 3.7, it is possible to prevent deformation of the welding wire during the withdrawal of the welding wire in the fail pack container, and to maintain the withdrawal resistance uniformly by preventing the variation and increase of the withdrawal resistance. You can.

In addition, the drawing resistance can be maintained uniformly, thereby preventing the wire from being drawn out in two or three strands or bundles at the same time due to entanglement of the wire. You can increase it.

Although specific embodiments of the present invention have been described in detail above, the present invention is not limited thereto, and those skilled in the art may make various changes and modifications based on the technical idea of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The top view which shows an example of the winding width formation by which the welding wire is wound in a loop shape.

Figure 2 is a perspective view showing a wire extraction jig for welding according to the first embodiment of the present invention.

Figure 3 is an exploded perspective view showing a wire extraction jig for welding according to a second embodiment of the present invention.

Figure 4 is a plan view showing a wire extraction jig for welding according to a second embodiment of the present invention.

5 is a cross-sectional view taken along the line A-A of FIG.

Figure 6 is an exploded perspective view showing a wire extraction jig for welding according to a third embodiment of the present invention.

<Description of Symbols for Main Parts of Drawing>

10, 30, 60: withdrawal jig 11, 32, 62: pressure plate

13, 53: magnetic material 34, 64: rounding part

50: connecting member 51: connecting rod

52: connection ring

Claims (8)

A pressure plate for pressing an upper portion of the winding layer of the welding wire accommodated in the fail pack; It is provided on one side of the pressure plate and comprises a magnetic material having a predetermined interval in the winding direction of the winding layer, The magnetic body satisfies the ratio 1.2 (suppressive force / repulsive force) 3.7 of the suppression force for controlling the one loop of the wire drawn out by the magnetic force and the repulsion force of the one loop of the wire drawn out from the winding layer. And a wire drawing jig for welding. Here, the restraining force is the mean magnetic force ×

The repulsive force is wire tensile stress x wire cross-sectional area x wire winding sphere speed. The method of claim 1, The magnetic material is radially disposed, the lower surface of the magnetic material is covered with a base material of the pressing plate so that the magnetic wire is not in direct contact with the welding wire drawing jig. The method of claim 1, The magnetic material is a plurality of radially arranged so that mutual magnetic force is excluded, at least three places for welding wire withdrawal jig characterized in that the arrangement. The method of claim 1, The magnetic body is provided with a plurality of magnetic bodies connected by a connecting member, the lower surface of the magnetic body set is arranged so that the cover is covered by the base material of the pressing plate. The method of claim 4, wherein The wire extraction jig for welding, characterized in that the coupling means corresponding to the magnetic set is provided on the pressure plate so that the magnetic set is separated from the pressing plate. The method of claim 1, The magnetic material is a welding wire extraction jig, characterized in that the center of the magnetic material is disposed in the center circle that is equal to half of the width of the pressure plate. The method of claim 1, And the magnetic body is arranged such that the center of the magnetic body is located in the outer diameter direction of the pressing plate at a center circle of the width of the pressing plate disc. The method of claim 1, The magnetic material is welded wire extraction jig characterized in that the neodymium magnet (Nd-Fe-B) of the rare earth (稀土 類, rare earth) magnetic material to be used semi-permanently.

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