JP2007196287A - Seam welding machine for welding inside r of work - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seam welding machine capable of easily welding the inside R of a circular or curved work even when the inside R is small. <P>SOLUTION: In the seam welding machine, the lower part of a cylinder at the upper part is provided with an angle plate, the space between the angle plate and a housing at the upper part is provided with an angle regulation plate; the housing at the upper part is provided with a flange-fitted spacer; the flange-fitted spacer is provided with an electrode; the space between a frame at the lower part and a housing at the lower part is provided with an angle regulation plate; the housing at the lower part is provided with a flange-fitted spacer, and the flange-fitted spacer is provided with an electrode. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a seam welder for welding an inside R (inner diameter) of a workpiece (workpiece).

Conventionally, a seam welder is a method of generating heat and welding on the principle of 0.24 I ² Rt = Q by flowing current through two plates (see, for example, Patent Document 1 and Patent Document 2). The electrodes are two rotating disk electrodes arranged above and below the workpiece, and the rotation axis is parallel to the upper and lower electrodes. In seam welding, it is possible to perform welding without particular problems with respect to the outside R (outside diameter) of a circular or curved workpiece and the outside R of a straight workpiece.

However, it is very difficult to weld the inside R (inner diameter) of a circle or a curve, and it is impossible when the inside R curve is tight or the inside R is small.
The reason is that when the inner R curve is tight or the inner R is small, the disk electrode itself hits the workpiece and becomes an obstacle, and the electrode cannot be applied to the welded portion. Moreover, even if the inner radius R is wide or the curve is gentle, the electrode itself is in the way and it has been very difficult to weld appropriately.

JP-A-10-202369 (FIGS. 1 to 5) JP-A-11-309585 (FIG. 1)

  Therefore, an object of the present invention is to provide a seam welder that can easily weld a round or curved workpiece R even when the inner R curve or inner radius is small.

In order to achieve the above object, an inner seam welder of the present invention comprises:
In seam welders,
The upper cylinder of the seam welder and the electrode housing are attached so that the angle can be adjusted, and the lower frame and the electrode housing are attached so that the angle can be adjusted, and the rotation axes of the upper and lower electrodes are not parallel.
Furthermore, the seam welder for inner R of the present invention is a seam welder,
An angle plate is provided in the lower part of the upper cylinder of the seam welder, an angle adjustment plate is provided between the angle plate and the upper housing, a flanged spacer is provided in the upper housing, and the flanged The spacer has electrodes,
An angle adjusting plate is provided between the lower frame and the lower housing, and the lower housing is provided with a flanged spacer, and the flanged spacer is provided with an electrode.
The diameter of the flanged spacer and the electrode is preferably smaller than that of the housing.

That is, the electrodes are arranged so that the rotation axes of the electrodes are not parallel as in the prior art but are sandwiched at an angle.
As a result, when welding the inside R of the workpiece, the electrode itself does not hit and interfere with the workpiece. For this reason, even when the inner R curve or the inner R is small, the electrode can be easily applied to the welded portion of the workpiece.
For example, an angle adjusting plate is provided between the cylinder and the electrode housing, or a movable mechanism is provided between the cylinder and the housing to connect each other, thereby adjusting the angle of the electrode corresponding to each workpiece. Is.
Further, when the flanged spacer and the electrode are smaller in diameter than the housing, the workpiece can be easily welded with the electrode.

Furthermore, it is preferable that the electrode is cylindrical.
In the present invention, a conventional disk-shaped electrode can also be used as the electrode. However, when a conventional disk-shaped electrode is used, the electrode wears out with use, and the diameter of the electrode gradually decreases (see FIG. 3a). Therefore, the life is short and the welding point is changed, and it becomes necessary to reset the angle according to the diameter at that time.
Therefore, when the electrode is made cylindrical, the diameter of the electrode does not change even if the electrode is worn by use (see FIG. 3b). Therefore, there is an advantage that the life is long and the welding point does not change.

Since the present invention has the above-described configuration, it is possible to easily weld the inner R of a circular or curved workpiece even when the inner R is small.
In addition, when the electrode is a cylindrical electrode, the diameter does not change even when the electrode is worn. Therefore, the life of the electrode is prolonged and the welding point is not changed.

An example of an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a view showing an inner seam welder of the present invention.
An angle plate 2 is provided at the lower part of the cylinder 1 provided at the upper part of the seam welder, and an angle adjusting plate 4 is provided between the angle plate 2 and the upper housing 3. A flanged spacer 5 is provided on the upper housing 3, and a cylindrical electrode 6 is provided on the flanged spacer 5.

  An angle adjusting plate 4 ′ is provided between the lower frame 7 and the lower housing 3 ′ of the seam welder, and a flanged spacer 5 ′ is provided above the lower housing 3 ′. A “cylindrical electrode 6” is provided at “.

  By providing flanged spacers 5, 5 ′ on the housings 3, 3 ′, the cylindrical electrodes 6, 6 ′ become smaller than the size of the housings 3, 3 ′. , Which can be contacted more easily.

  The angle adjusting plates 4 and 4 'are attached to the angle plate 2 and the frame 7 with bolts or the like. By changing the angle of the angle adjusting plate, the rotation axes of the upper and lower electrodes are made not parallel. It is possible to attach various angles. As a result, it is possible to weld R of workpieces having various sizes and angles.

FIG. 2 is a view showing a cylindrical electrode of the present invention.
A flanged spacer 5 (and 5 ') is provided on the upper portion of the housing 3 (and 3'), and a cylindrical electrode 6 (and 6 ') is provided on the upper portion of the flanged spacer 5 (and 5'). Yes.

FIG. 3a is a diagram showing a state where a disk-shaped electrode is worn;
FIG. 3b is a diagram showing a state where a cylindrical electrode is worn.
The conventional electrode 9 has a disc shape, and even this disc-shaped electrode can be used for welding the round or curved workpiece R of the present invention. The diameter of the electrode wears and changes. However, when the cylindrical electrode 6 (and 6 ′) is used, the electrode 6 (and 6 ′) wears like a slanted line 8 ′ and wears in the direction of the vertical arrow. As shown by the horizontal arrow, it does not wear and does not change. Therefore, the life of the electrode is prolonged and the welding point is not changed.

FIG. 4 is a diagram showing a trajectory in which the cylindrical electrode rotates and welds the inside R of the workpiece.
A state (trajectory) in which the cylindrical electrode 6 (and 6 ') is welded to the inner diameter of the curved workpiece 10 is shown.

FIG. 5 is an enlarged view showing a trajectory for welding the inner R when the inner R of the workpiece is small.
It is the figure which expanded the locus | trajectory of the cylindrical electrode in case the inside R of the workpiece | work 10 is small clearly, and the cylindrical electrode 6 (and 6 ') welds the small inside diameter of the curved workpiece | work 10 in it. (Trajectory) is shown. The arrow indicates the direction of rotation.

6 and 7 are examples of product diagrams made possible by the present invention.
Of these products, R is one that was impossible to weld with a conventional seam welder. According to the invention of the present application, it is possible to apply the R of the workpiece to the electrode.

It is a figure which shows the seam welding machine for inner R of this invention. It is a figure which shows the cylindrical electrode of this invention. It is a figure which shows the state with which the disk-shaped electrode is worn out. It is a figure which shows the state with which a cylindrical electrode is worn. It is a figure which shows the locus | trajectory which a cylindrical electrode rotates and welds the inside R of a workpiece | work. It is a figure which shows the locus | trajectory which welds inside R when inside R of a workpiece | work is small. It is a figure which shows the example of the pipe which not only outer R but the inside R was welded by this invention. It is a figure which shows the example of the product by which not only the outside R but the inside R was welded by this invention.

Explanation of symbols

1 Cylinder 2 Angle plate 3, 3 'Housing 4, 4' Angle adjustment plate 5, 5 'Space with flange 6, 6' Cylindrical electrode 7 Lower frame 8, 8 'Diagonal line indicating wear 9 Conventional electrode 10 Workpiece

Claims (4)

In seam welders,
The workpiece is characterized in that the upper cylinder and electrode housing of the seam welder are mounted so that the angle can be adjusted, the lower frame and electrode housing are mounted so that the angle can be adjusted, and the rotation axes of the upper and lower electrodes are not parallel to each other. Seam welding machine for welding R of In seam welders,
An angle plate (2) is provided at the lower part of the cylinder (1) at the upper part of the seam welder, and an angle adjustment plate (4) is provided between the angle plate (2) and the upper housing (3), A flanged spacer (5) is provided in the upper housing (3), and an electrode (6) is provided in the flanged spacer (5);
An angle adjustment plate (4 ′) is provided between the lower frame (7) and the lower housing (3 ′), and a flanged spacer (5 ′) is provided in the lower housing (3 ′). The flanged spacer (5 ′) is provided with an electrode (6 ′),
A seam welding machine for welding an inner part R of a workpiece.   A seam welding machine for welding the inside R of the workpiece, wherein the flanged spacer (5, 5 ') and the electrode (6, 6') are smaller than the housing (3, 3 '). The seam welding machine for welding the inside R of the workpiece according to claim 1 or 2, wherein the electrodes (6, 6 ') are cylindrical.

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