JPS60174631A - Butt welding device - Google Patents

Abstract

PURPOSE:To make a structure, a weight and conveyance of the titled device simple, light and convenient respectively, by making movement and control operation of a moving clamp into a manual type based on a torque wrench. CONSTITUTION:Turning and chamfering of an end face are performed by a rotary chamfering machine C by correcting the tip part of a pipe P made of synthetic resin held by each clamp into a trud round. The end faces of the pipes P, P made of the synthetic resin are made to abut against both the surfaces of a hot plate H by turning a torque wrench 4 by making the hot plate H interpose by removing the rotary chamfering machine C. In addition to the above, predetermined pressing force is given through a torque indication plate 41 by turning the torque wrench 4 and fixed by a locking mechanism 5. When the end face of the pipe P is fused, the torque wrench 4 is made to turn reverse by releasing the locking mechanism 5, the hot plate H is removed rapidly, the pipes P, P are made to butt against each other by turning the torque wrench 4 again and the pressing force is made into the predetermined force through reading of the indication plate 41, which is made to keep for a predetermined period of time by the locking mechanism 5.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a butt welding device used when butt-joining synthetic resin pipes made of vinyl chloride resin, polyethylene resin, etc.

(Prior Art) Conventionally, this type of butt welding apparatus is known in which a fixed clamp and a movable clamp are disposed on a base, and the movable clamp is moved by the operation of a hydraulic cylinder.

When butt-joining synthetic resin pipes, the synthetic resin pipes are held in a fixed clamp and a movable clamp, the end faces of each synthetic resin pipe are chamfered, and the end faces of each pipe are pressed against a hot plate and heated and melted. Then, the end surfaces of the molten tubes were butted together and welded and joined.

(Problems to be Solved by the Invention) However, in conventional welding devices, the moving and pressing operations of the movable clamp were performed by operating a hydraulic cylinder. Alternatively, there is a problem in that it is difficult to finely adjust the pressing force using a hydraulic cylinder when butt-joining molten pipe end surfaces.

Furthermore, if the operating mechanism of the movable clamp is hydraulic, the weight of the entire device increases and is inconvenient to carry, making it unsuitable for on-site piping construction.

(Means for Solving the Problems) The present invention solves all the problems that such conventional devices had, and includes a clamp 2 fixed to the base 1 and soil,
The movable clamp 3 is arranged to face each other, and the movable clamp 3
The device is characterized by being equipped with a torque wrench 4 for moving toward the fixed clamp side and applying a pressing force, and a cock mechanism 5 for maintaining the pressing force of the torque wrench 4. Butt welding allows the clamp to be moved and suppressed inside the cylinder, and is lightweight and easy to carry! ! It provides equipment.

(Example) Hereinafter, a specific configuration of the present invention will be described in detail based on an example.

FIG. 1 is a partially igneous front view of a butt welding device showing an embodiment of the present invention, in which reference numeral 1 is a base, 2 is a fixed clamp, 3 is a movable clamp, 4 is a torque wrench, and 5 is a The lock mechanism, H is a hot plate, C is a rotary beveling machine, and P is a synthetic resin pipe.

The fixed clamp 2 and the movable clamp 3 are arranged opposite to each other on the base 1. The fixed clamp 2 is fixed to the base 1, and the movable clamp 3 is attached to the guide shaft 11 which is passed over the base 1. You can move around with guidance.

The tube holding parts of the fixed clamp 2 and the movable clamp 3 are -
J3 has a half-split structure that is divided into two at the bottom, and its negative end can be opened and closed by pin-joining, and a locking mechanism (not shown) provided at the other end allows the synthetic resin pipe P to be opened and closed. The outer circumferential surface of each half member can be held securely by each half member.

In addition, the opposing ends of each clamp 2.3 apply a pressing force to the outer wall of the end of the held synthetic resin pipe P to correct the end of the pipe to be butt-jointed into a perfect circle. Adjustment bolts 20.30 are provided.

The torque wrench 4 is made of elastic steel or the like, and the lower end of the torque wrench 4 is pivotally supported by the lower part 31 of the movable clamp 3, and a torque pointer 42 is threaded at 80 G on the pivot. The movable clamp 3 has a tube holding part and a lower part 31.
are slidably connected to each other, and the lower part 31 is connected to the slide shaft 1.
Even when the tube holding portion is fixed at 1, by rotating the wrench 1 to 4 toward the fixed clamp, the tube holding portion protrudes toward the fixed clamp. 41 is a torque display board provided on the upper part of the torque wrench 4;
When applying pressing force to the movable clamp 3 by rotating the
By reading the deflection using the torque finger td42, the pressing force can be confirmed.

On the other hand, the C+tuck mechanism 5 is for maintaining the pressing force of the torque wrench 4, and one end thereof is connected to the torque wrench 4.
It is pivotally supported at the upper end of the base 1, and the other end can be fixed to the base 1.

The butt welding apparatus of the present invention has the above-mentioned configuration, and the process of welding pipes together using this apparatus will now be described with reference to FIG.

First, each synthetic resin pipe P is fixed to the fixed clamp 2 and the movable clamp 3. At this time, the end of the synthetic resin pipe P is made to protrude slightly from the side surface of the □ clamp.

Next, move the movable clamp 3 to a predetermined position, and
1 onto the guide shaft 11 using a bolt (not shown). Then, by turning the adjustment bolts 20 and 30 provided on the fixed clamps 2 and 15 and the movable clamp 3, a pressing force is applied to the outer wall of the tube end, and the tube tip of the synthetic resin tube P held by each clamp is made into a perfect circle. to correct.

After correcting the pipe tip of the synthetic resin pipe P held by each clamp into a perfect circle in this way, a rotary chamfer 111c is set between the fixed clamp 2 and the movable clamp 3, and the rotary chamfer iJ [Rotate C to cut the tube end surface and chamfer the inner surface of the tube end.

Thereafter, the rotary chamfering machine C is removed, and the hot plate 1-1 is interposed between the fixed clamp 2 and the movable clamp 3. Then, by rotating the torque wrench 4, the synthetic resin pipe P held by the movable clamp 3 is made to protrude toward the fixed clamp side, and the hot plate H
The end faces of the respective synthetic resin pipes P and P are brought into contact with both sides of the pipe.

In this way, from the state where the tube end surface is in contact with the hot plate H, the torque wrench 4 is further rotated, and while reading the pressing force of the torque wrench 4 on the torque display plate 41, a predetermined pressure is applied to the hot plate I. Pressure is applied, and the elastic deformation of the torque wrench 4 is fixed by the locking mechanism 5. When the end face of the synthetic resin 6- resin pipe P comes into pressure contact with the hot plate 1 and gradually melts,
Since this molten resin is extruded into and out of the tube end surface, the pressing force of the torque wrench 4 decreases, but since the torque wrench 4 has elastic force, the end surface of the synthetic resin tube P It melts while being pressed against 1.

Therefore, while releasing the locking mechanism 5, the torque wrench 4
quickly (remove the hot plate H and rotate the torque wrench 4 again to project the synthetic resin pipe P held in the movable clamp 3 to the side of the fixed clamp, then remove the synthetic resin pipe P held in the fixed clamp 2) Press it against the end face of the resin pipe ρ with a predetermined pressing force.

Of course, when making this butt-L joint between the tubes, the pressing force is applied while reading the pressing force of the torque wrench 4 on the torque display plate 41 in the same manner as described above, and this pressing force is maintained by the locking mechanism 5 to a predetermined level. Hold time.

In this way, the synthetic resin pipes held by the fixed clamp and the movable clamp are firmly welded together.

(Operations and Effects of the Invention) As described above, the butt welding device of the present invention has a fixed clamp and a movable clamp disposed opposite each other on the base,
The movable clamp is equipped with a torque wrench that moves toward the fixed clamp side and applies a pressing force, and a locking mechanism to maintain this pressing force. It was easy to fine-tune the pressing force when pressing the pieces together to butt-join them, and an extremely strong welded joint was obtained.

In addition, the device of the present invention has a simple structure because the movable clamp is moved and suppressed manually using a torque wrench, and is much lighter than conventional hydraulic welding devices, making it easy to carry. It is very convenient for on-site piping construction.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view of a butt welding device, showing an embodiment of the present invention. 1...Base 11...Guide shaft 2...
...Fixed clamp 3 ...Moveable clamp 4
... Torque wrench 41 ... Torque display plate 42 ... Torque pointer 5 ... Lock mechanism C ... Rotary chamfer H ... ...Hot plate P...
...Synthetic resin pipe 9-

Claims (1)

[Claims] A fixed clamp (2) for holding a synthetic resin pipe on a base (1) and a movable clamp (3). The movable clamp (3) is provided with a torque wrench (4) for moving toward the stationary clamp and applying a pressing force, and a torque wrench (4) for maintaining the pressing force of the torque wrench (4). A butt welding device characterized by being provided with a locking mechanism (5).