JPS6117384A - Welding device with polishing device - Google Patents

Abstract

PURPOSE:To provide a titled device with which stable weld strength and welding without flashes are efficiently obtd. by providing welding electrodes and brushes for grinding the surfaces of materials to be welded in series in the weld line direction and executing welding and grinding in the same stage. CONSTITUTION:This resistance welding device executes welding by rotating the upper welding electrode 1 moved upward and downward by a cylinder 11 attached to a frame 12 and the lower welding electrode 2 held by a supporter 13 at a welding speed, conducting electricity between the two electrodes 1 and 2 while feeding the materials 3, 4 grasped under the pressure between the electrodes in the direction (a) and forming nuggets 5 by Joule heat to the lap surfaces of the materials 3, 4 to be welded. The brushes 8, 9 rotating at a high speed by the cylinder 10 provided to the above-mentioned frame 12 and motors 21, 22 mounted to a support 20 are disposed to the above-mentioned welding machine. The flashes 6 generated in the stage of the welding are efficiently and simultaneously ground away by the brushes 8, 9 during the welding stage.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a welding device equipped with a polishing device that removes weld burrs remaining on the surface of a weld during the entire welding process in resistance welding.

[Prior art]

FIG. 4 is an explanatory diagram showing an example of conventional resistance welding. As shown in the figure, by sandwiching the welding material (3) and the material to be welded (4) at an appropriate pressure at the threshold of the welding electrode (1) and the welding 'a m (2), by applying the full welding current, Nagetsu h (5) is made by melting the metal at the joint. Welding electrode (1),
Steel alloys are usually used for (2), and the materials to be welded generate a lot of heat when welding current is applied (3), , (4)
Occurs in The heat generated near the contact portions of the welding materials (3), (4) with the welding electrodes (1), (2) is removed by the welding currents (1), (2)K. At this time, the materials to be welded (3) and (4) that are farthest from the welding electrodes (1) and (2)
Of the fc heat generated at the contact part of the welding electrode (1), (
2) The amount of heat taken away by K is smaller than the former. Furthermore, since there is contact resistance in the contact area between the welded materials (3) and (4), the amount of heat generated is large, and the temperature rise is most severe near the contact area between the welded materials (3) and (4). When the temperature rises, the resistance of the contact part becomes even greater, so the increased temperature rises more than other parts, and that part eventually melts. However, the material to be welded (3),
Welding (4) does not result in melting near the contact area with Buddha (1) and (2). At this time, if the welding current is turned off or if the bath welding electrode <1)e (2) is moved in the direction of the arrow @ as shown in Figure 4, the temperature of the molten part will drop and a nugget (5) will be formed, which will cause the welding to occur. Welding materials (3) and (4) are welded.

Figure 5 is a sectional view taken along line A-A in Figure 4, showing that molten metal passes through the contact surface of the welded materials (3) and (4) and protrudes to the surface, forming a weld bulge (6). It shows that there is.

FIG. 6 is a sectional view showing an example of a welded portion of a conventional galvanized steel sheet. Zinc has a lower melting point than iron, so even if the temperature rise at the contact point between the welding materials (3) and (4) and the welding electrodes (1) and (2) is small, the melt will flow out and cause weld burrs. (7) becomes. Conventionally, in order to eliminate these weld burrs, for example, welding welding (where welding current is passed intermittently to suppress the temperature rise on the surface of the welded material)
In addition, treatments such as frequent shaping of the surface of the welding electrode (to suppress heat generation on the surface of the welded material) were performed. However, Barzellon welding is not effective when the material to be welded is a thin plate, and seam welding has a slower connection speed than continuous current welding. Moreover, if the surface of the welding electrode is frequently shaped, running costs will increase. On the other hand, if the welding current is lowered, the weld will suddenly become stiff, but a fatal point will occur in which the weld strength will decrease.Therefore, in order to maintain stable strength, it is necessary to produce some welding burrs, water dispersion, and In some cases, it is necessary to perform all welding in a separate process. However, if there are aesthetic problems or problems such as flash falling off in a later process, polishing of the weld part is done in a separate process. However, this has the drawback of increasing the number of man-hours.As is clear from the above explanation, the conventional resistance welding method has many problems in countermeasures against weld burrs.

[Summary of the invention]

The present invention has been made to solve the above-mentioned problems, and in order to obtain a welding device equipped with a polishing device that can achieve stable welding strength and welding without casting spots in one step, welding current is applied to the material to be welded. The welding electrode and the surface of the material to be welded? The present invention provides a welding device with a grinding device, which comprises a brush for grinding, and the welding electrode and the brush are arranged in series in the direction of the welding line so that welding and grinding can be performed in the same process.

[Embodiments of the invention]

FIG. 1 is a front view showing an embodiment of the present invention, and FIG. 2 is a front view showing an embodiment of the present invention.
FIG. 3 is a side view of FIG. 1. In addition, the same symbols are used for parts with the same functions as in Figures 4, 5, and 6. It is attached. Disc-shaped welding electrode (1), (2)
The material to be welded (3), (4) 4 clamps, frame (2)
Welding electrode (
Pressure on 1)? It is now possible to add The lower welding electrode (2) is attached to the lower electrode support (to),
When the welding electrode (2) wears out, the height of the welding surface can be fully adjusted. Note that the lower pole support α3 is attached to the frame (2). In addition, welding electrode (1)
, On one or both sides of (2), there is a welding electrode drive device (
(not shown) are attached, welding electrodes (1), (2)
It is an older sister so that it can be driven at the same circumferential speed #all baths in contact.

The weld marks and rot (1) are connected to one terminal of the welding current supply device αG built into the frame (6) through the town flexible conductor q and the fixed conductor qυ, and the other bath contact electrode (2) is also connected to one terminal of the welding current supply device αG built in the frame (6). Similarly to the m-eyepiece (1), the ijJ deflector αη and the fixed conductor (I) are connected to the other terminal of the welding electrode drive device QQ. Brushes (8) and (9) are provided in the immediate vicinity of the anti-welding travel in 2).The brushes (8L (9) are arranged with a number of filamentous materials arranged radially around the center of the shaft load, The shaft side of the material is fixed to the shaft, and the other end is of uniform length so that it is almost cylindrical.As the thread-like material, for example, a hard horizontal wire or a nylon wire impregnated with 1 silica sand is used.Also, a brush ( 8)
, (9) respectively include a rotational drive motor (2]),
C2z is provided, and by rotating at high speed, the material to be welded f
It is designed to make smooth contact with the surface of 3L (4).

Further, the drive motor (
211 is configured to move up and down by cylinder αQ. Cylinder] 0 is a skewer-shaped cylinder, and the lowering limit of the brush (8) can be changed by fully adjusting the cylinder. When the brush (9) is attached, the drive motor (22 is attached to the lower brush support),
The height of the brush (9) can be fully adjusted. The lower brush support (E) is housed in the frame 7 (2).

A detailed explanation of the present invention configured as above is as follows. First, the bath contact electrodes (1) and (2) apply pressure to the joint of the materials to be welded (3) and (4) with 7 cylinders 0υ, and the welding current is supplied by the welding current supply device α→. Next, when the welding electrodes (1) and (2) are rotated at the welding speed by a drive device with several strokes on the welding electrode (tit (2)), a nugget (5) is generated in the hard joint, and a welding part (6) is formed. ) adheres to the surfaces of the materials to be welded (3) and (4).At this time, the welding part travels in the direction of the arrow ii' driven by the welding and poles (3) and (4).The brush (8 ), (9) is a material with elasticity, for example, a wire shaped radially, and is rotary ground to thoroughly follow the irregularities on the surface of the welded part, and the welded part burr (6) is ground off. In the above explanation, the case where the material to be welded is moved by the driving force of the welding pole is shown, but the present invention is not limited to this, and the method for driving the material to be welded is not limited to this. It can be set up and moved, or the material to be welded can be fixed with a tightening device.
The entire frame may be moved in the welding direction. Further, in the above description, a disc-shaped welding electrode was explained, but a rod-shaped welding electrode may also be used. However, in this case, it is necessary to provide a separate drive source for the material to be welded or to completely fix the material to be welded and move the frame in the direction of contact with the bath.

Applications of the 'X invention to other uses are as follows.

As mentioned above, when the surface of the material to be welded is galvanized, weld burrs are likely to occur. In addition, when the surface of the material to be welded is covered with an oxide film and the surface of the material to be welded is covered with an oxide film, the contact resistance between the electrode to be welded and the surface of the material to be welded is high, resulting in increased heat generation (and burrs in the welded area). Apply the present invention to cases &f.

Welding with fewer welded parts is possible. In other words, in the above explanation, the welding part is arranged so that the entire burr passes through the welding part, but in an applied example, the welding electrode and the brush are arranged in the opposite direction to that described above so that the welding part can be ground by the brush before welding. Place it in In other words, the galvanized layer on the surface of the material to be welded,
Since welding is performed after removing the oxide film and eliminating the cause of weld burrs, weld burrs are minimized and these operations can be performed in one step.

〔Effect of the invention〕

As is clear from the above explanation, according to the present invention, the occurrence of weld flaws on the surface of the welded material is reduced, and
This has the remarkable effect of being able to perform stable welding in one step.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an embodiment of the present invention, Fig. 2 is a sectional view taken along line BB in Fig. 1, Fig. 3 is a side view of Fig. 1, and Fig. 4 is an example of conventional resistance welding. The explanatory drawings shown in FIG. 5 are a sectional view taken along line A-A in FIG. 4, and FIG. 6 is a sectional view of a conventional welded portion of a galvanized steel sheet. (1), (2)...Welding electrode, (3), (4)...
Welded material, (6), (7)... Welding part burr, (8),
(9)...Brush. In addition, in each figure, are the four symbols the same or equivalent parts? shall be indicated. Agent Patent Attorney Sanro Kimura Figure 1 Figure 31! I1 1.5 1i2 Fig. 1F Fig. 4 Fig. 6rl! J

Claims (1)

[Claims] It consists of a welding electrode that applies welding current to the material to be welded, and a brush that grinds the surface of the material to be welded, and the welding electrode and brush are arranged in series in the direction of the welding line to perform welding and grinding in the same process. A welding device with a polishing device characterized in that