JP2006231346A - Apparatus for welding wire material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for welding a wire material, in which the apparatus can carry out welding work even when the size of a member to be welded by electric resistance welding has somewhat changed. <P>SOLUTION: The apparatus 11 for welding the wire material grips a plate material 40 and the wire material 50 by means of at least one rotatable roller electrode 25 and an electrode corresponding to the rotatable roller electrode, and joins the wire material to the plate material by the electric resistance welding by supplying welding current while pressing the plate material and the wire material. In this case, the wire material has a round shape cross section, and a holding groove 60 is provided on the electrode to be arranged on the wire material side so as to hold a plurality of kinds of wires having different sizes of cross sectional shapes. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a wire welding apparatus.

In order to weld a strip-shaped plate material, a technique of forming an indentation in the shape of a strip-shaped plate material on an electrode and energizing the strip-shaped plate material while pressing the strip-shaped plate material with the electrode is known (for example, patent document) 1).
JP-A-3-35882

  However, in the technique described in Patent Document 1, when the size of the strip plate changes, the electrode must be remade. For this reason, it becomes one factor which causes the raise of the cost which welding requires.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a wire welding apparatus capable of welding even if the size of a member to be electrically resistance-welded is slightly changed.

In order to achieve the above object, the invention according to claim 1 is characterized in that the plate material and the wire material are sandwiched between at least one rotating roller electrode and an electrode corresponding to the rotating roller electrode, and energized while applying pressure. In the wire rod welding apparatus for joining the plate and the wire by electric resistance welding,
A wire rod welding apparatus, wherein a holding groove capable of holding a plurality of types of wire rods having different cross-sectional shapes is provided in an electrode disposed on the wire rod side.

  The holding groove holds a plurality of types of wires. In other words, even if the size of the member to be electrically resistance welded, that is, the wire, changes slightly, the wire welding apparatus can perform electrical resistance welding without replacing the electrode disposed on the wire side. . Since it is not necessary to recreate the electrode arranged on the wire side, an increase in cost required for welding can be suppressed.

  Embodiments of the present invention will be described below with reference to the drawings.

(First embodiment)
1A is a schematic front view showing the wire welding apparatus 11 according to the first embodiment, FIG. 1B is a schematic side view showing the wire welding apparatus 11, and FIG. FIG. 2 is an enlarged view showing the main part of the welding device 11 for the same wire, and FIG. 2 is a diagram for explaining the size of the wire 50 that can be held by the holding groove 60 of the first embodiment.

  The wire welding apparatus 11 is a continuous electric resistance welding apparatus, when outlined, and sandwiches and presses the plate 40 and the wire 50 by at least one rotating roller electrode 20 and an electrode 30 corresponding to the rotating roller electrode 20. While being energized, it is used to join the plate 40 and the wire 50 by electric resistance welding. The wire 50 has a circular cross section. The electrode 20 (or 30) arranged on the wire 50 side is provided with a holding groove 60 that can hold a plurality of types of wires 50 having different cross-sectional sizes.

  The wire welding apparatus 11 shown in the figure has one rotating roller electrode 20 that is rotatably held, and the rotating roller electrode 20 is an electrode disposed on the wire 50 side. The electrode corresponding to the rotating roller electrode 20 is composed of a planar electrode 30. The rotating roller electrode 20 is provided so as to be movable with respect to the planar electrode 30, and sandwiches the plate material 40 and the wire material 50 between the planar electrode 30. A holding groove 60 for holding the wire 50 is circumferentially provided on the outer surface of the rotating roller electrode 20. Since the rotary roller electrode 20 is an electrode disposed on the wire 50 side, the holding groove 60 can be processed relatively easily. The rotating roller electrode 20 is urged by a pressing means (not shown) to press the wire 50 against the plate 40. The rotating roller electrode 20 and the planar electrode 30 are connected to a power source 70 and energized from the wire 50 to the plate 40. The wire 50 has a circular cross section with a radius r.

  In the welding operation, the plate material 40 is placed on the flat electrode 30 and the wire 50 is set on the plate material 40. The plate member 40 and the wire 50 are sandwiched between the rotating roller electrode 20 and energized while being pressed from the rotating roller electrode 20 side, whereby the plate member 40 and the wire 50 are joined by electric resistance welding.

  Referring to FIG. 2A, in the first embodiment, the holding groove 60 has a semicircular cross section with a radius R. The holding groove 60 is capable of holding a plurality of types of wires 50 having a cross-sectional radius r of R / 2 <r <R.

  More specifically, as shown in FIG. 2B, when the radius r of the wire 50 is less than or equal to ½ of the radius R of the holding groove 60, a gap is formed between the rotating roller electrode 20 and the plate 40. Is not formed, and current cannot be passed from the wire 50 to the plate 40. Therefore, the radius r of the wire 50 must be larger than ½ of the radius R of the holding groove 60. This is because a gap s (see FIG. 1C) is ensured between the rotating roller electrode 20 and the plate material 40, and the wire material 50 is reliably energized to the plate material 40.

  As shown in FIG. 2C, when the radius r of the wire 50 is equal to or larger than the radius R of the holding groove 60, the wire 50 cannot be held in the holding groove 60. Therefore, the radius r of the wire 50 must be smaller than the radius R of the holding groove 60. This is because, when the rotating roller electrode 20 rotates, the wire rod 50 is held in the holding groove 60 to enable continuous electric resistance welding. When the rotating roller electrode 20 is pressurized, the wire 50 slides on the surface of the holding groove 60 and stably contacts the bottom 60 a of the holding groove 60. For this reason, even if the wire 50 is pressed by the rotating roller electrode 20, the wire 50 is hardly displaced from the rotating roller electrode 20.

  As described above, the holding groove 60 having the radius R can hold a plurality of types of wire rods 50 having a radius r of the cross section of R / 2 <r <R. In other words, the wire welding apparatus 11 can perform electrical resistance welding without replacing the rotating roller electrode 20 even if the size of the member to be subjected to electrical resistance welding, that is, the size of the wire 50 slightly changes within the above range. It becomes. Since it is not necessary to recreate the rotating roller electrode 20, an increase in cost required for welding can be suppressed.

(Second Embodiment)
FIG. 3 is an enlarged view showing a main part of the wire welding apparatus 12 according to the second embodiment, and FIG. 4 is a diagram for explaining the size of the wire 50 that can be held by the holding groove 61 of the second embodiment. It is.

  With reference to FIGS. 3 and 4A, in the second embodiment, the holding groove 61 includes a pair of inclined surfaces 63 that are recessed from the pair of bending points 62 of the outer surface 20a of the electrode 20 while being inclined. It has a V-shaped cross section. It is desirable that the inclination angle θ of the inclined surface 63 from the outer surface 20 a is the same for any inclined surface 63. The holding groove 61 has a radius r1 of a circle inscribed in a triangle formed by a virtual outer surface 20b connecting a pair of bending points 62 and a pair of inclined surfaces 63 with a radius r of the cross section (see FIG. 4B). ) And smaller than the radius r2 (see FIG. 4 (C)) of a circle having each inclined surface 63 as a tangent and each bend point 62 as a contact point.

  More specifically, as shown in FIG. 4B, the radius r1 of the circle inscribed in the triangle formed by the virtual outer surface 20b connecting the pair of bending points 62 and the pair of inclined surfaces 63 is the radius r of the wire 50. In the following cases, a gap is not formed between the rotating roller electrode 20 and the plate member 40, and the wire member 50 cannot be energized. Therefore, the radius r of the wire 50 must be larger than the radius r1 inscribed in the triangle formed by the virtual outer surface 20b connecting the pair of bending points 62 and the pair of inclined surfaces 63. This is because a gap s (see FIG. 3) is secured between the rotating roller electrode 20 and the plate member 40, and the wire member 50 is surely energized.

  As shown in FIG. 4C, when the radius r of the wire 50 is equal to or larger than the radius r2 of a circle having each inclined surface 63 as a tangent and each bending point 62 as a contact, the wire 50 is placed in the holding groove 61. Can not hold. Accordingly, the radius r of the wire 50 must be smaller than the radius r2 of a circle having each inclined surface 63 as a tangent and each bending point 62 as a contact. This is because, when the rotating roller electrode 20 rotates, the wire 50 is held in the holding groove 61 to enable continuous electric resistance welding. When the rotating roller electrode 20 is pressurized, the wire 50 comes into stable contact with each of the pair of inclined surfaces 63.

  As described above, the holding groove 61 having the V-shaped cross section has a radius r of the cross section larger than the radius r1 of the circle inscribed in the triangle formed by the virtual outer surface 20b connecting the pair of bending points 62 and the pair of inclined surfaces 63. A plurality of types of wire rods 50 that are large and smaller than the radius r2 of a circle having each inclined surface 63 as a tangent line and each bending point 62 as a contact point can be held. In other words, the wire welding apparatus 11 can perform electrical resistance welding without replacing the rotating roller electrode 20 even if the size of the member to be subjected to electrical resistance welding, that is, the size of the wire 50 slightly changes within the above range. It becomes. Since it is not necessary to recreate the rotating roller electrode 20, an increase in cost required for welding can be suppressed.

(Third embodiment)
FIG. 5 is a diagram showing a rotating roller electrode 21 according to the third embodiment.

  In the rotating roller electrode 21 according to the third embodiment, the holding groove 64 includes a pair of inclined surfaces 66 that are recessed from the pair of bending points 65 of the outer surface 21a as in the second embodiment. It has a letter shape. Further, in the third embodiment, the pair of inclined surfaces 66 are configured to be relatively close to and away from each other.

  The rotating roller electrode 21 has a pair of divided bodies 22 that are divided at a V-shaped holding groove 64. The pair of divided bodies 22 are slidably held on the support shaft 23. Between the pair of divided bodies 22, a pulling means 24 composed of a tension spring or the like is provided. The pulling means 24 constantly biases the pair of divided bodies 22 in the direction of approaching each other. Further, the pair of divided bodies 22 can be moved in directions away from each other against the elastic force urged by the attracting means 24. As a result, the holding groove 64 having a V-shaped cross section has a telescopic structure, and the pair of inclined surfaces 66 are relatively close to and away from each other.

  Since the holding groove 64 is provided with an expansion / contraction structure in this manner, it is possible to hold a larger wire 50 as compared with the second embodiment, and the size of the member to be electrically resistance-welded, that is, the wire 50 is slightly changed. Even so, it is possible to perform electric resistance welding without replacing the rotating roller electrode 21. Since it is not necessary to recreate the rotating roller electrode 21, an increase in cost required for welding can be suppressed.

  Alternatively, one of the pair of divided bodies 22 may be fixed to the support shaft 23 and the other divided body 22 may be slidably held on the support shaft 23.

(Fourth embodiment)
6A is a schematic front view showing the wire welding apparatus 13 according to the fourth embodiment, FIG. 4B is a schematic side view showing the wire welding apparatus 13, and FIG. 4C is a plan view. 3 is a plan view showing the relationship between an electrode 31 and a wire 50.

  The wire welding apparatus 13 according to the fourth embodiment is the first in that the electrode corresponding to the rotating roller electrode 25 is composed of the planar electrode 31 and the planar electrode 31 is an electrode disposed on the wire 50 side. To the third embodiment.

  A plurality of holding grooves 67 having a V-shaped cross section are formed in the planar electrode 31 in order to hold the wire 50. Between the planar electrode 31 and the plate material 40, an insulating material 32 is disposed with appropriate portions.

  The planar electrode 31 has a plurality of divided bodies 33 divided at the V-shaped holding grooves 67. The plurality of divided bodies 33 are slidably held on the base 35. Between the divided bodies 33, a pulling means 34 composed of a tension spring or the like is provided. By the attracting means 34, the elastic forces in the directions approaching each other are constantly urged to the adjacent divided bodies 33. Further, the adjacent divided bodies 33 can be moved in directions away from each other against the elastic force urged by the attracting means 34. Thereby, similarly to the third embodiment, the holding groove 67 having a V-shaped cross section has a telescopic structure, and the pair of inclined surfaces 68 are relatively close to and away from each other.

  In the welding operation, a plurality of wire rods 50 are set on the planar electrode 31 and the plate member 40 is placed on the wire rods 50. The plate material 40 and the wire 50 are sandwiched between the rotating roller electrode 25 and energized while being pressed from the rotating roller electrode 25 side, whereby the plate 40 and the wire 50 are joined by electric resistance welding.

  In the fourth embodiment, since the electrode corresponding to the rotating roller electrode 25 is the planar electrode 31 and this planar electrode 31 is the wire 50 side, the positional relationship between the planar electrode 31 and the plate member 40 is determined. The positional relationship between the plate 40 and the wire 50 held by the planar electrode 31 is determined. Since the positioning of the planar electrode 31 and the plate material 40 is extremely easy, as a result, the positioning of the plate material 40 and the wire 50 can be performed very easily.

  Moreover, since the several wire 50 is hold | maintained at the plane electrode 31, the several wire 50 can be welded continuously and it becomes possible to improve productivity.

  Furthermore, since the holding groove 67 has a telescopic structure, it is possible to perform electrical resistance welding without replacing the planar electrode 31 even if the size of the wire 50 is slightly changed, as in the third embodiment. It becomes. Since it is not necessary to recreate the planar electrode 31, an increase in cost required for welding can be suppressed.

(Other variations)
Although the embodiment in which the wire has a circular cross section has been described, the present invention is not limited to this case, and can be applied to a wire having a square cross section.

1A is a schematic front view showing the wire welding apparatus according to the first embodiment, FIG. 1B is a schematic side view showing the wire welding apparatus, and FIG. 1C is the wire welding. It is an enlarged view which shows the principal part of an apparatus. It is a figure where it uses for description of the magnitude | size of the wire which can hold | maintain the holding groove of 1st Embodiment freely. It is an enlarged view which shows the principal part of the wire welding apparatus which concerns on 2nd Embodiment. It is a figure where it uses for description of the magnitude | size of the wire which can hold | maintain the holding groove of 2nd Embodiment freely. It is a figure which shows the rotating roller electrode which concerns on 3rd Embodiment. 6A is a schematic front view showing a wire welding apparatus according to the fourth embodiment, FIG. 4B is a schematic side view showing the wire welding apparatus, and FIG. It is a top view which shows the relationship with a wire.

Explanation of symbols

11, 12, 13 Wire welding equipment,
20, 21, 25 Rotating roller electrode,
20a, 21a outer surface,
20b virtual outer surface,
22 divisions,
23 support shaft,
24 attracting means,
30, 31 Planar electrode (electrode corresponding to the rotating roller electrode),
33 divisions,
34 Attraction means,
40 board,
50 wire rod,
60, 61, 64, 67 holding groove,
62, 65 Inflection point,
63, 66, 68 inclined surface,
70 power supply,
R radius of holding groove 60,
r Radius of wire,
r1 A radius of a circle inscribed in a triangle composed of a virtual outer surface 20b connecting a pair of bending points 62 and a pair of inclined surfaces 63,
r2 The radius of a circle having each inclined surface 63 as a tangent and each bending point 62 as a contact,
s A gap between the rotating roller electrode 20 and the plate material.

Claims (7)

Welding of wire rods that joins the plate member and the wire rod by electric resistance welding by sandwiching the plate member and the wire rod by at least one rotary roller electrode and an electrode corresponding to the rotary roller electrode and energizing while applying pressure. In the device
A wire welding apparatus, wherein a holding groove capable of holding a plurality of types of wires having different cross-sectional shapes is provided in an electrode disposed on the wire side. The wire has a circular cross section,
2. The wire welding apparatus according to claim 1, wherein a holding groove capable of holding a plurality of types of wires having different cross-sectional shapes is provided in the electrode disposed on the wire side.   3. The holding groove has a semicircular shape with a cross section having a radius R, and can hold a plurality of types of wires having a cross section radius r of R / 2 <r <R. Wire rod welding equipment.   The holding groove has a V-shaped cross section including a pair of inclined surfaces that incline while being inclined from a pair of bending points on the outer surface, and a radius r of the cross section is a virtual outer surface that connects the pair of bending points and a pair of inclinations. It is possible to hold a plurality of types of wire rods that are larger than the radius of a circle inscribed in a triangle composed of faces and smaller than the radius of a circle having each inclined surface as a tangent and each bending point as a contact. The wire welding apparatus according to claim 2.   5. The wire welding apparatus according to claim 4, wherein the pair of inclined surfaces are configured to be relatively close to and away from each other.   The wire rod welding device according to claim 1, wherein the at least one rotating roller electrode is an electrode disposed on the wire rod side.   The electrode corresponding to the rotating roller electrode is constituted by a plane electrode, and the plane electrode is an electrode disposed on the wire side, The wire rod according to any one of claims 1 to 5, Welding equipment.

Images