JP2003112268A - Method and device for shaping electrode ring for seam welding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the simultaneous cutting and shaping of a seam electrode ring including a side surface thereof, which cannot be performed by the rotation al force of a drive knurl itself, and to provide excellent welding without sepa rately providing any cutter for the side surface thereof. SOLUTION: In a method for performing the seam-welding of a metal plate while shaping a tip of the electrode ring for the seam welding, a knurl which presses an electrode surface of the welded electrode ring by a knurling tool and transmits the rotational force thereto to shape the electrode surface, and a side surface cutter which is disposed concentric with the knurl and cuts burrs generated on the side surface of the electrode ring. The circumferential length d of the knurl and the circumferential length D of the side surface cutter are in the relationship of the formula π (ϕD-ϕd), and the rotational motion to cut a metal raised on the side surface of the electrode is generated on a cutter by utilizing the difference according to the formula.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seam welding machine for metal plates, and more specifically, a disc-shaped knurl is pressed against the tip of an electrode wheel for seam welding, and the knurl is rotated by rotating the knurl. The present invention relates to a knurl shaping method and device for cutting and shaping an electrode tip with a knurled groove provided on the circumference.

[0002]

2. Description of the Related Art A conventional knurl-driven shaping device for a seam welding machine is a part of a contact surface with a seam electrode wheel for the purpose of increasing a friction coefficient during driving and improving weldability of a surface-treated steel sheet. Alternatively, a gear-shaped knurled product was used over the entire surface. In addition, there is known a shaping method using a forging knurl that presses the electrode wheel whose temperature has risen due to heat during welding with high pressure to maintain the tip shape.

In the conventional knurling type seam welding method, electrode shaping is generally performed in the order of "welding" and "bite shaping". In this case, as shown in FIG. 3, the knurl 32 is pressed against the tip of the seam welding electrode 30, that is, the electrode surface 31 in contact with the workpiece during welding, and is rotated to form a knurl in the circumferential groove of the knurl. The burrs adhering to the electrode are cut by and the tip of the electrode is adjusted to the original shape.

[0004]

Conventionally, if the metal bump is left as it is while projecting on the side surface of the electrode, sometimes a shunt occurs when the object to be welded and the side surface of the electrode wheel are close to each other, resulting in poor quality.
In addition, if a bite device is not installed, off-line shaping is required, which promotes downtime. Therefore, in the past, it was necessary to separately provide a bite device in order to cut and shape the metal ridge protruding on the side surface of the electrode due to the pressing pressure of the knurl or the settling of the tip.

[005]

Therefore, the present invention was developed to solve the above problems. That is,
According to the method of the invention of claim 1, in the method of seam-welding a metal plate while shaping the tip of the electrode wheel for seam welding, the electrode surface of the electrode wheel after welding is pressed by the knurling to transmit the rotational force and shape it. And a side cutter arranged concentrically with the knurl for cutting burrs generated on the side surface of the electrode wheel. The peripheral length d of the knurl and the peripheral length D of the cutter are expressed by the formula π. (ΦD-φ
A method of shaping an electrode wheel for seam welding, which has a phase relationship of d) and uses the difference in circumferential length according to the above formula to generate a rotational motion for cutting the metal protruding on the electrode side surface in the cutter device. provide.

Next, in the device of claim 2 of the present invention, in a device for seam welding a metal plate while shaping the tip of the electrode wheel for seam welding, the metal layer adhered to the electrode surface of the electrode wheel after welding is removed. A knurl for removing, and a disk-shaped knurl for removing the metal layer adhering to the knurls by pressing knurls on both sides of the electrode surface of the electrode wheel on the sloping surfaces whose angles spread outward. A driving knurl mechanism in which side cutters for cutting burrs generated on both side surfaces of an electrode wheel are concentrically and integrally assembled with a support shaft for rotationally driving the knurls. A knurl circumferential length d is in the range of D> d, and a shaping device for seam welding electrode wheels is provided in which a gear-shaped cutting blade is provided on the circumference of the cutter.

[0000]

[Operation] And according to the method of claim 1 of the present invention,
After seam welding, the knurled knurl is used to remove the surface dispersion and plating layer attached to the pressure surface of the electrode wheel, and the knurl drive is also used to simultaneously cut the metal layer protruding on the electrode tip side surface with the side cutter. The electrode shaping time can be shortened and good shaping and welding results can be obtained.

Further, according to the device of the present invention, since the side cutter having a diameter larger than that of the knurl is simply added concentrically with the knurl drive shaft, the structure is simple and the attachment / detachment can be easily performed from the outside. .

[0009]

1 is a sectional view showing an embodiment of an electrode shaping device for carrying out the method of the present invention. FIG. 2 is a front view of the shaping device.

The body of the shaping device of the present invention is arranged near the electrode wheel, and is used for cutting surface splatters and metal bumps attached to the electrode surface by knurling, and is supported by the welder body (not shown). A bite holder is attached to the frame so that it can be moved back and forth by a backup cylinder.

[0111] Reference numeral 1 indicates the appearance of the shaping device. 2 is a knurl having knurls on the circumference of a disk. The knurl is pressed against the tip electrode surface 3a of the seam welding electrode wheel 3 by the pressure of a cylinder (not shown), and drives the knurl itself to cut and remove burrs adhering to the electrode surface.

Reference numerals 4 and 5 are disc-shaped inclined knurls for cutting the inclined end surface of the electrode wheel. The inclined knurls 4 and 5 have an inclination angle α that spreads outwards on both sides of the electrode surface of the electrode wheel, and removes the metal layer attached to the inclined surface 3b. The inclined knurls are arranged concentrically on both sides of the knurl 2.

Reference numerals 6 and 7 are side cutters which are arranged outside the inclined knurls and cut burrs on the electrode side surface 3c. The diameter D of the side cutter is a metal plate having a size larger than the diameter d of the knurl, and is made of a hardened hard metal material. On the circumference of the side surface cutters 6, 7, there are formed serrated cutting blades having a serrated edge angle of about 60 degrees.

In the assembly structure in this case, the sleeve 8 is fixed to the inner diameter of the one inclined knurl 4, the knurl 2 is inserted concentrically on the outer peripheral surface of the sleeve, and the other inclined knurl 5 is It is inserted into the sleeve and placed on the knurl 2 on the electrode surface.

The side cutter 6 is composed of two circular plates having a circular shape larger than the diameters of the knurls and the inclined knurls. A wavy blade mold is formed on the circumference.
The side cutters 6 and 7 are arranged in a sandwich shape from both sides of the inclined knurls 4 and 5. The side cutters 6 and 7, the inclined surface cutting tools 4 and 5, and the knurl 2 are provided with four bolt holes in common, and four bolts B1 are inserted into these bolt holes, and the bolts are tightened with a bolt from the outside. 5 bites are fixed together.

The knurl having such a structure is firmly fixed to the inner diameter of the sleeve by a single bolt B2 at the tip of the rotary support shaft 10 inserted through a key. The support shaft 10 is connected to an electric motor supported on the electrode head side to rotate the knurl 2.

The tip of the knurl has a cutting edge (groove) having a shape adapted to the tip of the electrode. The basic structure is that the knurl is pressed against the electrode surface by the pressure of the cylinder and the knurling force cuts the burr generated on the electrode surface by the knurling force to shape the surface.The blade edge of the side cutter is pushed out from the electrode surface. The electrode side surface burr is removed.

In this case, due to the difference between the surface cutting feed of the electrode surface by the knurl 2 and the circumferential length difference of the side surface cutter, the rotational force generated between the electrode side surface and the side surface cutters 6 and 7 causes wavy burrs protruding on the electrode side surface. It can be effectively cut with the tooth mold.

[0019]

As described above, the claims of the present invention
According to method 1, the side surface of the electrode wheel can be cut by the rotational force of the driving knurl itself. That is, after welding, it is possible to simultaneously cut and shape the electrode tips to the original shape by knurling the metal layer including surface scattering and plating adhered to the electrode surface and the electrode side surface, so it is not necessary to equip a side cutter separately. And good electrode shaping and welding quality can be obtained.

Further, according to the apparatus of claim 2 of the present invention, since the side surface cutter for cutting the side surface of the electrode is concentrically arranged with the knurl for shaping the pressure surface of the electrode wheel, the existing seam welding machine can be used. Can be diverted easily and cheaply. It can also be used as a seam welder for various plated steel plates with forging pressure knurls.

Further, according to the apparatus of the present invention, there is no problem caused by the alloying of the plated steel sheet and the seam electrode wheel as in the conventional case, and it is also most suitable for seam welding of lead-free plated steel sheets of tanks which require airtightness. It is possible to obtain a good electrode shaping effect.

[Brief description of drawings]

FIG. 1 is a sectional structural view showing an embodiment of a shaping device for carrying out the method of the present invention.

FIG. 2 is an arrow A view of FIG. 1 of the shaping device used in the present invention.

FIG. 3 is a front view showing an embodiment of a shaping device according to a conventional seam welding method.

[Explanation of symbols]

1 shaping device 2 nar Electrode wheel for 3 seam welding 3a Electrode surface 3b Electrode inclined surface 3c electrode side 4 Inclined nar 5 Inclined nar 6 side cutter 7 side cutter 8 sleeve 10 rotation support shaft

Claims (2)

[Claims] 1. A method for seam-welding a metal plate while shaping the tip of a seam welding electrode wheel, wherein the electrode surface of the electrode wheel after welding is pressed by a knurled wheel to transfer rotational force and shape the knurl. And a side cutter arranged concentrically with the knurl for cutting burrs generated on the side surface of the electrode wheel. The peripheral length d of the knurl and the peripheral length D of the cutter are represented by the formula π (φD-φd) Of the electrode wheel for seam welding, characterized in that the cutter device is caused to generate a rotational movement for cutting the metal raised on the side surface of the electrode by utilizing the difference in circumferential length according to the above equation. Shaping method. 2. A device for seam-welding a metal plate while shaping the tip of a seam welding electrode wheel, and a knurl for removing a metal layer adhered to an electrode surface of the electrode wheel after welding,
Disc-shaped slanted knurls for removing metal layers adhering to the slanted surfaces by pressing knurls on the slanted surfaces whose angles spread outwards on both sides of the electrode wheel, and both side surfaces of the electrode wheel A driving knurl mechanism in which a side cutter for cutting burrs generated on the knurling is concentrically integrated with a support shaft for rotationally driving the knurl, and a peripheral length D and a knurl peripheral length d of the side cutter are provided. Is a shaping device for a seam welding electrode wheel in which D> d is set and a gear-shaped cutting blade is provided on the circumference of the cutter.