JPS59153586A - Portable seam welding machine - Google Patents

Abstract

PURPOSE:To reduce weight and size and to improve operability by providing a pair of electrode driving shafts, a supporting frame which supports the driving shafts and an electrode pressing device to a portable seam welding machine. CONSTITUTION:When the lever 50 of an electrode pressing device is in the position of a solid line, objects to be welded are pressed between both electrodes 4 and 5 by the force of springs 62 and while electricity is conducted to the electrodes 4, 5, the electrodes are driven and the objects to be welded are subjected to seam welding. When the lever 50 is in the position of an alternate long and two short dashes line, the pressing force is released and the spacing between two electrodes 4, 5 is opened. Electrode driving shafts 14, 15 are connected to output shafts 40, 43 and are driven to rotate in the directions opposite from each other.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a portable 7-metal seam welding system for seam welding thin sheets of metal.
This relates to a welding machine.

Conventionally, most thin metal sheet seam welding machines have been stationary types that are installed and used within factories.

On the other hand, a few portable models have been developed, but they are extremely heavy and must be equipped with wheels to propel themselves, and their thickness is also extremely large, making them difficult for workers to handle. However, there were a number of drawbacks, including the difficulty of welding and the inability to perform welding work in confined spaces. Therefore, the present invention aims to eliminate these drawbacks, and the contents of the present invention will be explained below based on examples. In addition, for the seam welding work, as shown in Figure 1, a transformer and several control devices are required.
A welding machine 6 comprising electrodes 4 and 5 attached to the curved ends of a secondary cable 2.3 connected to the controller 1 is necessary, and the present invention relates to the welding machine 6 among these. It is something.

In Fig. 1, the controller 1 has a quadratic first law cable 7.7.
' and a secondary cable 2.3 are connected, and the tip of the secondary cable 2.3 is connected to a seam welder 6. In addition, when the equipment in the controller is water-cooled, a cooling water supply/drainage hose 8.9 is connected to the controller 1.

If the secondary cable 2.3 or the seam welding machine 6 is to be water-cooled, and the cooling water is supplied and discharged via the controller, a water supply and discharge hose 10 for this purpose is provided.
．． 11 is connected to the controller 1. In addition, 12.13 is 2
This is the terminal attached to the controller to which the next cable is connected.

Next, the structure of an embodiment of the seam welding machine 6 will be explained based on FIGS. 2 to 4.

In this embodiment, both the secondary cape L/2.3 and the welding machine 6 are water-cooled.

14.15 is an electrode drive shaft made of conductive material.
6.17 is a plastic universal joint, 18 is a reduction gear box, 19 is a motor, 20.21 is a support frame made of an electrically conductive material, and 22 is a convex portion 38 of the support frame 20.
and the reduction gear box 18.

The electrode drive shaft (hereinafter simply referred to as "drive shaft") I1.1
5 are appropriately connected to output shafts 40 and 43 discharged from the reduction gear box 18 via universal joints 16 and 17, so that they are mutually driven to rotate in opposite directions.Support frame 2
0 has a cooling chamber 25 therein, and a closing ring 24, 30 made of an electrically conductive material is screwed into the penetrating portion of the drive shaft 14 to prevent cooling water from flowing out. A bearing 26 is interposed between the closing ring 24 and a nut 27 made of an electrically conductive material screwed into a threaded portion 28 at the end of the drive shaft 14. The bearing 26 is preferably made of a material that has high electrical conductivity, a low coefficient of friction, and is heat resistant, such as lumber.

Further, the nut 27 is screwed so that the shaft end surface of the four driving shafts 14 and the front surface of the nut 27 are on the same plane, and the driving Il! 11] The inner surface of the disc-shaped electrode 14, which is fastened to the shaft end of the shaft 14 via the port 29, is in contact with the end surface of the shaft 14 and the front surface of the NAND 27. Therefore, part of the current supplied from the terminal 2' of the secondary cable 2, which is fastened to the upper surface of the convex part 38 of the support frame 20 via the port 39, is based on the ring 2.
4.3o and the drive axle load 4, and the other parts are the closing ring 24, the bearing 26 and the nut 27.
Electricity is supplied to the electrode 4 via the electrode 4. on the other hand,
On the side of the drive shaft 14 to which the universal joint 16 is connected, the spring bearing washer 31 is assembled next to the closing ring 30, and the compression spring 3 spring bearing is assembled in the order of washer 33, sliding bearing 34, and washer 35. A NAND 36 is screwed into a threaded portion 42 provided on the shaft 14.

The bearing 26 is pressed against the ring 24 by the force of the spring 32, thereby increasing the efficiency of power supply to the electrode 4 via the bearing 26.

In the present embodiment π, the hos 41 of the universal joint 17 connected to the shaft 15 is movable relative to ll[lI 43 of the reduction gear box 18. In addition, the host 41 and the shaft 4
3, the rotational force is transmitted through the sliding key. The assembled state of the drive shaft 15 is the same as that of the drive shaft 14, except that the connection method of the universal joint described above is different from that of the universal joint 16, so a description thereof will be omitted.

The assembly of the shaft 15 is the same as the assembly of the shaft 14 in the part numbers with a d'unyu added to the symbol, and 37 is a cooling chamber.

Now, a trunnion shaft 44 is provided on both sides of the support frame 2o of the drive shaft 14, and a jig 45 made of non-conductive material is rotatably attached to this shaft 44, and the tip of the link 45 is rotatably attached to the shaft 44. is fixed to the support frame 21 of the drive shaft 15. Also, arms 46 are provided on both sides of the support frame 21, and the arms 46 are attached to the support frame 21.
The terminal 3' of the secondary side water-cooled cable 3 which supplies power to the terminal 3' or the port 47 can be tightened.

Furthermore, a pin 48 rotates above the arm 46, a sleeve 49 is inserted into the pin 48, a lever 5o of a pressurizing device is inserted on both sides of the sleeve, and a roller #+[ A guide for i s 2 (a pin 54 is provided, the pin 48 and a pin 49) - A boss 55 is attached to the end of the core frame 51, and a boss 55 is attached to the end of the core frame 51. The roller shaft 52 is rotatably mounted on the shaft 55, and rollers 56 are rotatably mounted on both sides of the shaft 52. In addition, the lever 5o and the roller 5
6 are both made of plastic, and a plastic guide temporary 57 is attached to the support frame 20 side between the support frame 2° and the inner surface of the arm 46, so that there is a gap between the support frames 20 and 21. In this case, the power is not turned on.

On the other hand, the roller 56 rolls on the upper surface 58 of the support frame 20 and comes to a stop when it hits a flange 59 provided on the support frame 20 side. Further, a splash receiver 60 is fixed on one side of the lever 50, and the upper part of the core rod 5 is slidably inserted into the center of the splash receiver 60. The threaded spring holder provided above the core rod 51 is screwed into a working nut 61.
17 A spring 62, which is a pressure source of the electrode pressurizing device, is inserted between the spring receiver 60 and the spring receiver 60.

In Fig. 2.3, when the lever 50 is at the position indicated by the solid line, the distance between the axes of the pin 48 and the roller shaft 52 becomes narrow, and when it is at the position indicated by the two-dot chain line, the distance between the two axes is narrowed. It's starting to spread.

Therefore, when the lever 50 is in the position shown by the solid line, the workpiece to be welded can be pressurized between both electrodes by the force of the spring 62, and when it is in the position shown by the two-dot chain line, the pressing force is released. Moreover, the space between both electrodes 4.5 is opened.

Note that 63 is a bundle of pressure devices attached to one end of the lever 50. Openings 64.64' and 65.65 are provided on both sides of the support frame 20.21, respectively, to communicate with the internal water cooling chamber 25.37.

The openings 64' and 65' are provided on the opposite side of the opening 64.65 in FIG. 2, and these openings 64.65 are connected by a tube. The tip of the cooling water tube 67 provided at the tip of the water cooling cable 2 is removably connected to the opening 64, and the tip of the cooling water tube 67 provided at the tip of the water surface cable 3 is connected to the opening 65. It is designed to be detachably connected to the Therefore, the water-cooled cable 2A3 and the welding machine 6 are cooled while circulating cooling water. FIG. 5 is an explanatory view of the state of use, in which the members to be welded 68 and 69 are bent into an L shape, and the raised portions 68' and 69 are bent.
The bent portion 69 is seam-welded by driving the bent portion 69 while applying current to the electrode 4.5 with the electrode 4.5 sandwiched and pressurized.

As described above, the seam welding machine of the present invention is lightweight and small in size, so it has extremely good workability and also has the effect of being able to perform seam welding in narrow spaces. Therefore, when the seam welding machine of the present invention is used for roofing work, it becomes possible to weld seams such as inside corners, outside corners, and the opening of l"tbffl, which could not be done with conventional seam welding machines. be.

In addition, as mentioned above, in the present invention, in addition to the method of pressurizing the electrode and the adjustment of the pressurizing force, the method of supplying power to the electrode is based on one drive shaft of the electrode. It has an excellent feature of increasing the power feeding efficiency by supplying power from both the bearing and the bearing. Even if this is done, the effects of the present invention will not be impaired. Incidentally, if the insulation method between the moving shafts 14 and 15 is changed, the universal joints 16 and 17 may be made of metal.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of the main equipment necessary for seam welding work, Fig. 2 is a side view of a portable seam welding machine that is an embodiment of the present invention, Fig. 3 is a view taken in the direction of arrow A in Fig. 2, Figure 4 is B of Figure 3.
FIG. 5, which is a cross-sectional view of only the main part of the view in the direction of arrows, is an explanatory diagram of the usage state of the seam welding machine. ■ is the controller, 2 and 3 are secondary cables, 4 and 5 are polarization, 6
is a seam welding machine, 7 and 7 are primary cables, 8 and 9 are cooling water hoses, 14 and 15 are electrode drive shafts, 16 and 17 are universal joints, 2o and 21 are support frames, and 50 is the lever of the electrode pressurizing device , 63 is the handle. Patent Applicant Shinwa Kogyo Co., Ltd. Hiroshi Takahashi Procedural Amendment (Method) Published on January 7, 1972 June 30, 1988 Commissioner of the Patent Office Kazuo Wakasugi L Case Indication 1988 Patent Application No. 29172 2 Name of the invention Portable seam welding machine 3 Relationship with the case by the person making the amendment Representative Haruo Hamuro (and one other person) 4 Date of the amendment order May 11, 1980 5 Amendment Target application, specification, and drawings 0 Contents of amendment as attached

Claims (1)

[Claims] A pair of electrodes and a drive shaft which are appropriately connected to a drive source at one end and have an electrode attachment portion at the other end, a pair of support frames that support each of the electrode drive shafts independently of each other, and an appropriate connection between the two support frames. with an electrode pressurizing device attached to the position,
A portable seam welding machine further configured such that at least a portion of the current supplied to each electrode support frame is supplied to the electrode via a sliding bearing inserted between the support frame and the electrode.・