JPH0445274B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a shaft-fed resistance welding device comprising a pressure cylinder, a power supply cylinder, a power supply conductive plate, a welding machine base, and the like.

[Prior Art] A shaft-powered welding machine in which a power supply cylinder is integrally formed at the rear of a pressurizing cylinder is disclosed in, for example, the Japanese Patent Publication No. 58-6596.
It is publicly known as shown in the publication No.

In this type of welding machine, a power supply cylinder is usually installed in front of a base on which the welding machine is mounted.

[Problem to be solved by the invention] However, if the power supply cylinder is located in front of the base, the power supply conductive plate will also necessarily be located in front of the base, and the main conductor from the welding transformer will be When connected to the power supply conductive plate, space is required in front of the base for the connection and for the placement of the main conductor, and the conductor gets in the way during welding work with a welding machine, making it difficult to work. The problem was that it was difficult to carry out.

In addition, since the rear end of the piston rod is housed in the cylinder, a pressurizing cylinder and a power supply cylinder must be long enough to accommodate the amount of movement of the piston rod, and piping for cooling the rod is difficult. There were also some problems.

This invention was made in view of the problems of the conventional technology, and its purpose is to provide a compact shaft-fed resistor that eliminates obstacles in front of the base and facilitates welding work. The company aims to provide welding equipment.

[Means for Solving the Problems] In order to achieve the above object, the shaft-fed resistance welding equipment of the present invention includes a pressurizing cylinder for sliding a rod, and a pressurizing cylinder that penetrates the rod and can be slid in close contact with the rod. A shaft-fed resistance welding device comprising: a power supply cylinder equipped with a power supply ring that is moved; a power supply conductive plate that passes through the rod and has a surface capable of contacting the power supply ring; and a welding machine base. , characterized in that a pressure cylinder is provided in front of the base, a conductive plate for power supply and a power supply cylinder are provided at the rear, and the rear end of the rod protrudes rearward from the rear end of the power supply cylinder. It is.

[Operation] By pumping high-pressure fluid to the rear of the piston of the pressurized cylinder and discharging the high-pressure fluid in front of the piston, the rod moves forward and places a workpiece between the movable electrode at its tip and the fixed electrode. to hold. At this point, when high-pressure fluid is pumped behind the piston in the power supply cylinder, the piston moves forward and presses the power supply ring with the inclined surface at its tip. Therefore,
The power supply ring is closely attached to the rod and the power supply conductive plate, and the current from the welding transformer is sent to the movable electrode via the main conductor, the power supply conductive plate, the power supply ring, and the rod to weld the workpiece. When welding is completed, the piston moves back by discharging the high pressure fluid behind the piston, the power supply ring is released from close contact with the rod and the power supply conductive plate, and power supply to the movable electrode is interrupted. The rod is then retracted back to its original position by pumping high pressure fluid in front of the piston of the pressurized cylinder and discharging high pressure fluid behind the piston.

Welding work is performed using a welding machine in this manner, but in this invention, since the power supply conductive plate and the power supply cylinder are provided at the rear of the base, the welding machine connects the welding transformer and the power supply conductive plate. The conductor is always located behind the base. In addition, since the rear end of the rod protrudes rearward from the rear end of the power feeding cylinder, the length of the cylinder of the power feeding section can be shortened, and the total length of the cylinder is shorter than that of the conventional example. It's short and easy. Furthermore, since the rear end of the rod protrudes outside the cylinder, cooling piping and the like for the rod can be easily installed.

[Embodiment] The shaft-fed resistance welding equipment shown in FIGS. 1 and 2 is the first embodiment of the present invention. In the figures, 1 is a pressure cylinder for sliding the rod 2; An independent power supply cylinder 3 is arranged behind the pressure cylinder. The rod 2 passes through the power supply cylinder 3, and a divided power supply ring 4 is disposed around the outer circumference of the rod 2. Further, on one side of the power supply ring 4, a conductive plate 5 for power supply passing through one side of the power supply cylinder 3 is provided.
is installed so that it can come into close contact with the power supply ring 4. An insulator 11 is provided on the surface of the power supply conductive plate 5 that comes into contact with the power supply cylinder 3 and the rod 2. Further, the power supply conductive plate 5 is fixed to the rear end surface of the pressure cylinder 1 with a plurality of screws. A main conductor 6 from the welding transformer is connected to the power supply conductive plate 5.

7 is a welding machine base, and the pressure cylinder 1 and the power supply cylinder 3 are attached to the base 7 by bolts or the like via a pressure cylinder mounting seat 12 that is welded or bolted to the pressure cylinder 1. Installed.

The pressure cylinder 1 is located in front of the base 7, and the power supply conductive plate 5 and the power supply cylinder 3
is located at the rear.

Note that the connection positions of the power supply conductive plate 5 and the main conductor 6 and the connection positions of the pressure cylinder mounting seat 12 and the base 7 are shifted by 90 degrees as shown in Fig. 2 to facilitate mutual attachment. It can be done.

The rear end of the rod 2 projects further rearward than the rear end of the power supply cylinder 3.

In this device, by pumping high-pressure fluid from the passage 13 behind the piston 8 of the pressurized cylinder 1 and discharging the high-pressure fluid in front of the piston 8 from the passage 14, the rod 2 moves forward. A workpiece is held between the movable electrode 9 and a fixed electrode (not shown). At this point, when high-pressure fluid is pumped from the passage 15 to the rear of the piston 10 in the power supply cylinder 3, the piston 10 moves forward and presses the divided power supply ring 4 with the inclined surface at its tip. Therefore, the power supply ring 4 is connected to the rod 2 and the power supply conductive plate 5.
The current from the welding transformer is sent to the movable electrode 9 via the main conductor 6, the power supply conductive plate 5, the power supply ring 4, and the rod 2 to weld the workpiece. When welding is completed, the high-pressure fluid behind the piston 10 is discharged from the passage 15, so that the piston 10 retreats and the power supply ring 4 is released from its close contact with the rod 2 and the power supply conductive plate 5, and the movable electrode 9 The power supply to is interrupted. Next, high-pressure fluid is pumped from the passage 14 in front of the piston 8 of the pressurizing cylinder 1, and the passage 13 behind the piston 8 is fed under pressure.
By discharging high pressure fluid from the rod 2
moves back and returns to its original position.

Welding work is performed using a welding machine in this manner. In this embodiment, the pressure cylinder 1 and the power supply cylinder 3 are connected to the pressure cylinder 1 via the pressure cylinder mounting seat 12 which is welded or bolted to the pressure cylinder 1. It is attached to the base 7 with bolts etc.
The welding machine can be taken out from the base 7 by removing bolts and the like.

Since the power feeding conductive plate 5 and the power feeding cylinder 4 are provided behind the base 7, the main conductor 6 connecting the welding transformer and the power feeding conductive plate 5 is always connected to the base 7.
It will be located behind.

The shaft-fed resistance welding equipment shown in FIGS. 3 and 4 is a second embodiment of the present invention, and includes a pressure cylinder 1,
The rod 2, power supply cylinder 3, etc. are almost the same as those of the first embodiment, and the means for attaching the pressure cylinder 1 and power supply cylinder 3 to the base 7 are different, so the main parts are shown.

Power supply cylinder 3 and rod 2 of power supply conductive plate 5
An insulator 11 is provided on the surface that comes into contact with the
This power supply conductive plate 5 is fixed to the rear end surface of the pressure cylinder 1 with a plurality of screws, and the main conductor 6 from the welding transformer is connected to the power supply conductive plate. This is the same as in the first embodiment, but this power supply conductive plate 5 is connected to the base 7.
It also serves as a mounting seat for the power supply cylinder 3, and has extending parts 16 and 17 upward and downward from the power supply cylinder 3 for that purpose.
The main conductor 6 from the welding transformer is bolted to the power supply conductive plate 5 by bolts 18 in the extension portion 16, and the power supply conductive plate 5 is connected to the power supply conductor plate 5 via the insulator 19 by the bolts 18. It is attached to the base 7. A bolt insertion hole 20 is also formed in the extending portion 17, and the power supply conductive plate 5 is also bolted to the base 7 via an insulator 21 at this position.

In the case of the second embodiment, compared to the first embodiment, since there is no pressure cylinder mounting seat 12, the number of parts is reduced and the construction is somewhat simplified.

The shaft-fed resistance welding device shown in FIG. 5 is a third embodiment of the present invention, and the configuration of the pressure cylinder 1 is almost the same as that of the first and second embodiments. The main parts are shown because they are different in that the means for attaching the power supply cylinder 3 to the base 7, the current supply rod part 23, the power supply cylinder 3, and the power supply conductive plate 5 are integrated into a unit.

That is, the rod 2 is divided into a piston rod part 22 and an energizing rod part 23, and the energizing rod part 23 is fitted into the piston rod part 22. The current supply rod portion 23, the power supply cylinder 3, and the power supply conductive plate 5 are integrated into a unit. Further, the fact that the pressure cylinder mounting seat 12 is welded or bolted to the pressure cylinder 1 is the same as in the first embodiment, and the main conductor from the welding transformer is attached to one end of the extending portion. 6 is bolted to the power supply conductive plate 5 by bolts 18, which is the same as in the first and second embodiments, but the power supply conductive plate 5 is bolted to the insulator 19 by the bolts 18. It is attached to the pressurizing cylinder mounting seat 12 and the base 7 through the pressurizing cylinder mounting seat 12 and the base 7. A bolt insertion hole 20 is also formed at the other end of the extension, and the power supply conductive plate 5 is bolted to the pressure cylinder mounting seat 12 and the base 7 via the insulator 21 at this position as well.

Therefore, when replacing the power supply conductive plate 5 and the energizing rod part 23, etc., which are subject to heavy wear and tear, it is necessary to remove the bolts that attach the power supply conductive plate 5 to the base 7. The rod portion 23, the power supply cylinder 3, and the power supply conductive plate 5 can be simply and easily taken out from the base 7 as a unit.

In addition, since the unitized unit is attached to the base 7 by the power supply conductive plate 5 and the pressure cylinder 1 by the pressure cylinder mounting seat 12, it is similar to the first and second embodiments. There is no need to connect the power supply conductive plate 5 and the pressurizing cylinder with screws or the like.

Since the rear end of the rod 2 is designed to protrude rearward than the rear end of the power supply cylinder 3, the power supply cylinder constituting the power supply section can be short regardless of the amount of movement of the rod. As a result, the total length of the cylinder can be shorter than that of the conventional example. Furthermore, since the rear end of the rod 2 protrudes outside the cylinder, cooling piping and the like for the rod 2 can be easily installed.

[Effects of the Invention] The shaft-fed resistance welding equipment according to the present invention includes a power supply conductive plate and a power supply cylinder arranged behind the welding machine base, and connects the main conductor from the welding transformer to the power supply conductor. Since the connection is made to the plate, space for the connection and the arrangement of the main conductor is unnecessary in front of the base, and the conductor does not get in the way during welding work with a welding machine. , welding work is very easy to perform.

Furthermore, since the rear end of the rod protrudes rearward from the rear end of the power supply cylinder,
The power supply cylinder can be kept short regardless of the amount of movement of the rod, and as a result, the total length of the cylinder can be shortened compared to the conventional example, making the cylinder device more compact, and by using the protruding end of the rod, cooling piping can be reduced. etc. can be easily installed.

[Brief explanation of drawings]

Fig. 1 is an embodiment of the main part of the shaft-fed resistance welding device according to the present invention, and is a sectional view taken at - in Fig. 2, Fig. 2 is a rear view of the main part, and Fig. 3 is another embodiment. 4 is a rear view of the main part, and FIG. 5 is a sectional view of still another embodiment. 1... Pressure cylinder, 2... Rod, 3... Power supply cylinder, 4... Power supply ring, 5... Conductive plate for power supply, 7... Welding machine base, 12... Pressure cylinder mounting seat, 23 ... Rod part for energizing.

Claims (1)

[Scope of Claims] 1. A pressure cylinder on which a rod slides, a power supply cylinder equipped with a power supply ring that penetrates the rod and slides in close contact with the rod, and a power supply cylinder that penetrates the rod and is provided with a power supply ring that slides in close contact with the rod. A shaft-fed resistance welding device consisting of a power supply conductive plate with a contactable surface and a welding machine base, with a pressure cylinder in front of the base and a power supply conductive plate and power supply cylinder in the rear. A shaft-fed resistance welding device characterized in that the rod is provided with a rear end portion projecting rearward from a rear end portion of the power feeding cylinder. 2. The shaft-fed resistance welding device according to claim 1, wherein the pressure cylinder is attached to a base via a pressure cylinder mounting seat fixed to the pressure cylinder. 3. The shaft-fed resistance welding device according to claim 1, wherein the pressure cylinder and the power supply cylinder are attached to a base via a power supply conductive plate. 4. The shaft according to claim 1, characterized in that the current-carrying rod, the power-feeding cylinder, and the power-feeding conductive plate are integrated into a unit, and the power-feeding conductive plate is attached to the base via the pressure cylinder mounting seat. Power-fed resistance welding equipment.