JPS5820388A - Friction welding machine - Google Patents

Abstract

PURPOSE:To provide a friction welding machine which adapts itself to press welding of long-sized materials, bends, etc. by providing a rotary unit which holds an intermediate material between the two clamping units for gripping pipes, rotating only the intermediate material and drawing the units on both sides toward each other. CONSTITUTION:The works 1, 2 are inserted and gripped in a pressurizing unit 10 and a clamping unit 20 at a right angle to the axial direction. A gear block 38 is stuck to an intermediate material 3, and the intermediate material is inserted and held in a rotary unit for the intermediate material at a right angle to the axial direction. While the material 3 is kept rotated, the oil hydraulic cylinder 12 of the unit 10 is operated to draw the unit 20 toward the unit 10 and to weld the end faces of the materials 1, 2 to the end faces of the material 3 under equal pressure, whereby the materials are subjected to friction welding. The driving force upon the material 3 is released after the end of the welding and the welded material is subjected to deburring and other treatments. By such device, the friction welding of long-sized materials, bends, etc. is executed on installation site, etc. quickly and the performance of the joints is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a friction welding machine particularly suitable for welding rotary cross-section joints, such as elongated objects, non-linear members, or members fixed on one side in the field.

Friction welding is a method of welding members with rotating cross sections, such as round bars or pipes, by pressing them against each other while rotating one of them, and by utilizing the frictional heat generated at the contact area. It has the excellent feature of being able to weld with good joint performance in an extremely short period of time.

However, conventional friction welding machines are installed in a factory and weld a pair of objects to be welded by attaching them to the machine. The member that is to be rotated can only be attached and detached from the device in the direction of the rotation axis, so it is difficult to attach or detach it from the device. To remove both members after completion, it was necessary to pull out the entire member in the axial direction toward the rotating side, and then remove it in the direction perpendicular to the shaft. Therefore, it cannot be applied to long pipes, round bars, non-linear members, or steel pipe structures or piping where one side is fixed on site, and the range of application is limited.

The present invention has been made in view of the above-mentioned circumstances of conventional friction welding machines,
In particular, the object is to provide a friction welding machine that can be applied to welding long objects, bent members, large structures, on-site piping, etc.

The purpose of this is to "grip coaxially the vicinity of the ends to be welded of two objects to be welded with respective clamp units, and to place a short intermediate section of a corresponding cross section between these objects to be welded." The materials are inserted coaxially, and by rotating only this intermediate material and pulling the objects to be welded on both sides toward each other from the front side, the end faces of these and both end faces of the intermediate material are pressed together, and both joints are simultaneously friction welded. At the same time, this is achieved by allowing the objects to be welded and the intermediate materials to be attached to and removed from the apparatus by relatively moving them in the axial direction and the perpendicular direction.

Hereinafter, the present invention will be explained in detail with reference to drawings showing embodiments thereof.

The apparatus of the embodiment shown in FIGS. 1 and 2 has a pressurizing unit (10) that grips one object to be welded (1), and a pressurizing unit (10) that grips one object to be welded (1), and a pressure unit (2) that grips the object to be welded (2) coaxially with the gripping portion of the object (1) to be welded. clamp unit) 2G, and the workpiece 1 to be welded between them.
．． The intermediate material rotation unit 8o holds an intermediate material 8 having a cross section that matches the cross section of the joint portion of No. 2 so as to be rotatable coaxially with the gripping portion of the workpiece to be welded 1.2.

As shown in FIG. 2, the pressurizing unit lo is provided with a slit 11 that reaches from one side to the center, and the workpiece 1 to be welded can be attached and detached from any direction in a direction perpendicular to the axis, and is held by means not shown. It looks like this. Two pressurizing hydraulic cylinders 12 are fixed to the end face of the pressurizing unit) 1G on the opposite side from the intermediate material rotation unit, and the piston ronds 1B are bored in the pressure unit body 101 and the intermediate material rotation unit 80, respectively. The pressure unit 10 is a clamp unit having a pressure means, and its tip is fixed to the end face of the clamp unit 2ε facing the intermediate material rotation unit.

Clamp Unit) 20 is also provided with a slit 21 in the same direction as the pressure unit 1G, and the workpiece 2 to be welded can be attached and detached in a direction perpendicular to the axis, and a device (not shown) can be used to perform predetermined welding at the center. It can be held in this position.

The intermediate material rotation unit 8G also has slits 11 and 2 of the pressure unit 10 and clamp unit 20 from the center.
Slit 8 in the same direction as 1! is provided, so that the intermediate material 8 can be attached and detached in a direction perpendicular to the axis and can be rotatably held at a predetermined rotational position at the time of welding in the center.

An example of means for rotatably holding the intermediate material 8 in a predetermined position is shown in FIG. As described above, the housing of the intermediate material rotation unit 80 is provided with a slit 81 extending from the center through which the intermediate material 8 passes during welding to the side surface. Inside the housing are 8 pieces of the same diameter,
Gears 82, 88, and 84 having the same number of teeth are provided, and the gear 82 is pivotally supported by the housing and is rotationally driven by a drive motor 85 fixed to the housing via a belt or the like. Gears 88 and 84 are pivotally supported at the tips of arms 86 and 87, respectively, which swing around the shaft of gear 82.
The rack is rotated in the same direction and at the same speed as the gear 81 by a belt or the like passed between the pulley provided on the shaft of gear 88 and the pulley provided on the shaft of gears 88 and 84. Prior to mounting the intermediate material 8 on the intermediate material rotation unit 80, a gear block 88 is fixed to the outer periphery of the intermediate material 8 and the slit 81JC is inserted. An opening device through which the gear block 88 can be moved in and out is provided on the side surface of the housing where the slit 81 opens. Gears 88 and 8 are used when inserting intermediate materials and taking out welded workpieces.
4 is opened to allow gear block 88 to pass through and inserted into the predetermined welding position, all of the gears 82, 88, 84 are brought into position to engage the gap, lock 88 and are secured. The housing is provided with a through hole 40 that slidably fits into the piston rod 18 of the pressurizing hydraulic cylinder 12 of the pressurizing unit 1o. A cutting machine is also provided.

Since this device is configured as described above, the workpiece to be welded 1
．． 2 to pressurizing unit 10. It can be inserted into the crank 22) 20 at right angles to the axial direction and gripped, and the gear block 88 is fixed to the intermediate member 8 to rotate the intermediate member 22) 8G. to hold. In this state, the objects to be welded on both sides.

The gripped portions of 2 and the intermediate material 8 are coaxially arranged.

Therefore, the drive motor 85 drives the gears 82 , 88 , 84 .
While rotating the gear block 88 and the intermediate material 8, the hydraulic cylinder 12 of 10 is rotated.
When the vignette rod 18 is pulled into the cylinder, the clamp unit 20 is drawn toward the pressure unit 10, and the end face of the welded material 1.2 is applied with equal pressure to both end faces of the rotating intermediate material 80. Pressure welding and friction welding are performed at the same time. In addition, if necessary, install an auxiliary hydraulic system between the pressurizing unit 10 and the intermediate material rotation unit, and adjust the distance between both the welded materials 1.2 and the intermediate material 8 to be equal. It is also possible to provide functions.

After the welding is completed, the transmission of the driving force between the drive mechanism of the intermediate material rotation unit 80 and the intermediate material 8 is released, and the paris are processed by the paris cutting device. Note that the gear block 88 needs to be able to be attached and detached in a direction perpendicular to the shaft of the intermediate member 8. In the example shown in FIG. 4, the gear block 88 has eight gears 88m provided with a radial groove (88d) extending from the center to the outer periphery.
ssb, 88e are stacked on top of each other, the intermediate material 8 is attached and removed by aligning the slit positions, and the gear 88b in the middle is turned to fix the intermediate material so that it does not fall out, and teeth are formed continuously around the entire circumference. It is. In this device, not only the objects 1.2 to be welded on both sides but also the intermediate material 8 can be removed in a direction perpendicular to the rotation axis, so the members after friction welding can be removed by moving the device itself.

As described above, the friction welding machine of the present invention does not require rotating the object to be welded and can attach and detach the cap by moving the device itself in a direction perpendicular to the rotation axis. Furthermore, by making the device portable, friction welding can be used to connect pipes to be welded to fixed round pipe members such as large steel pipe structures or piping sites. This makes it possible to speed up welding work and improve joint performance.

For example, when connecting pipes for long-distance piping work, a work group is formed that combines a portable friction welding machine, a supporting truck, a crane, etc., and (a) preparations such as excavation of the piping site are carried out. (b) Transporting the welding machine unit and pipes (Installing the welding machine unit to a fixed pipe) Cutting the end face (e) Installing the intermediate material and joining pipe (f) Welding and paris cutting (g) Removing the welding machine By systematically and continuously carrying out the movement to the next joint position, work efficiency can be significantly improved.

Similarly, when friction welding is applied to on-site piping work, the welding machine can be moved along the pipe itself or along a guide rail 52 laid along the pipe, for example, by straddling the pipe P as shown in FIG. It is attached to a gate-shaped self-propelled cart 50, runs along a guide rail 52 to a welding point, lowers the machine 51 at the welding point, embraces and grips the pipe P, performs friction welding, and after welding is completed. Raise the machine and remove it from the pipe,
A method of moving to a welding position on the rear side is also suitable. The holding means for the friction welding machine is not limited to a gate-type trolley, but it can be mounted on a self-propelled vehicle such as a forklift, and the slit is aligned with the height of the pipe to be welded from the ground, and the machine is inserted from any direction to weld the pipe. Numerous means are possible, such as gripping.

As described above, according to the present invention, with a simple configuration, friction welding can be applied to welding long or curved pipes, large steel pipe structures, and on-site piping, for which friction welding was difficult or impossible in the past. This makes it possible to achieve remarkable effects in improving work efficiency and joint performance.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an embodiment of the present invention, Fig. 2 is a perspective view thereof, Fig. 8 is a perspective view showing details of the intermediate material rotation unit, and Fig. 4 is an example of a gear block attached to the intermediate material. Fig. 5 is a front view showing an example in which the welding machine of the present invention is made portable and mounted on a self-propelled vehicle. 1.2... Work to be welded 8... Intermediate material 10, 2
0... Clamp unit 12, 113... Pressure means 80... Intermediate material rotation □ unit 52... Guide rail "Fig. 1 LJ Fig. 2 one

Claims (1)

[Claims] (1) Two clamp units that coaxially grip two objects to be welded each having a rotational diagram-shaped cross-sectional joint portion, and pressure that draws these two clamp units toward each other in the axial direction. and a means for holding an intermediate member located between the two clamp units and having a cross section that matches the joint portion of the workpiece to be rotatably driven coaxially with the joint portion of the workpiece, and the two clamp units. The work piece to be welded is attached to each of the above-mentioned clamp units, the intermediate material is attached to the above-mentioned intermediate material rotation unit, and only the intermediate material is rotated. The two clamp units are pulled together by the above-mentioned pressure means, and the objects to be welded on both sides are brought into pressure contact with both end surfaces of the intermediate material, thereby simultaneously friction welding the two joints. A friction welding machine characterized in that the intermediate material is moved relative to the rotating shaft in a direction perpendicular to the rotating shaft to be attached to and detached from the device. (2) The friction welding machine according to claim 1, wherein the device is portable. (8) One side of the object to be welded is piping that is already fixed at the site,
Friction welding according to claim 2, characterized in that the other is a pipe material connected thereto, and the device moves along the pipe itself of the piping or a guide rail laid along the pipe. Machine.