JPH0753316B2 - Weld press unit of ERW pipe manufacturing equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a welded press unit of an electric resistance welded pipe manufacturing facility, and particularly to a welded press unit capable of performing roll exchange quickly and reliably. Regarding

[Conventional technology]

FIG. 4 shows a typical example of a welded press unit for a conventional electric resistance welded pipe manufacturing facility. That is, the weld press unit includes a squeeze roller 1 horizontally opposed to each other, a pair of sliders 3 supporting the both rollers 1 and slidingly connected to each other by screw shafts 2 in opposite directions of the roller 1 and a screw shaft. The worm jack 4 for moving the worm 2 forward and backward, the motor 5 for driving the worm jack, the top roller 6 arranged directly above the squeeze roller 1, the roller support 7 for supporting the roller 6, and the pressing of the respective top rollers 6 are finely adjusted. A worm jack 8 to be adjusted and a top roller frame 9 supporting both top rollers.
And a worm jack 10 for driving the top roller frame 9 up and down, and a motor for driving the worm jack 10.
11 and a frame 12 that supports each of these constituent members, and the strip unwound by the entrance-side facility at a good position on the line passing between the squeeze rollers 1, sequentially,
After rolling the pipe 13 as a material for electric resistance welded pipe, and heating the linear joint by an arbitrary heating means such as low frequency, high frequency resistance or high frequency induction, the squeeze roller 1,
By passing the pipe 13 between the top rollers 6, the joint portion is crimped to continuously manufacture the electric resistance welded pipe.

In such a weld press unit, when the size of the product to be manufactured is changed, it is necessary to replace the squeeze roller 1 and the top roller 6 each time according to the size of the product.

Conventionally, in the weld press unit, when the squeeze roller 1 is replaced, the slider 3 is driven by driving the motor 4.
Are moved in both side directions to open the squeeze roller 1 in both side directions, and at a position where the top roller frame 9 has passed, the squeeze roller 1 is pulled out upward by an overhead crane or the like and replaced with a new squeeze roller.

Alternatively, as shown in JP-A-57-195585, a pair of squeeze rollers and a slider are provided in the casing,
There is a method in which the casing is slid in a direction perpendicular to the line so that the squeeze roller can be replaced offline.

[Problems to be solved by the invention]

 The above-mentioned conventional method has the following problems.

That is, as the diameter of the product to be manufactured and the thickness of the pipe become thicker, the top roller device also becomes larger, and therefore, in order to avoid the top roller device and pull out the squeeze roller 1, the squeeze roller is placed on both sides. The opening size must be extremely large.

On the other hand, since the welding output transformer and the output lead duct are arranged close to each other on the periphery of the weld press unit, especially on the drive side, the opening dimension of the squeeze roller is limited and the squeeze roller is pulled out. A difficult case occurs.

In the case of the above-mentioned known example, it is an effective method for surely replacing the squeeze roller in a short time.
Since the squeeze roller casing, which is a large size, is laterally pulled out and side-shifted, there is a problem that the device becomes complicated and large.

[Means for solving problems]

To achieve the above object, in the present invention, a pair of squeeze rollers for bending the coil in a curved shape to heat the joint portion of the coil and laterally pressing the joint portion of the coil, and the joint portion of the coil are provided. In a weld pressure unit of an electric resistance welded pipe manufacturing facility in which a coil is run between the top roller pressed from above and the electric resistance welded pipe, the pair of squeeze rollers are respectively supported by sliders and have a diameter equal to that of the coil. The top roller is a lift base configured to be slidable along a horizontal direction orthogonal to the running direction of the coil via a top roller frame. Supported,
The elevating base is configured to be movable along a direction orthogonal to a horizontal plane of the traveling direction of the coil.

[Action]

When replacing the squeeze roller in the weld pressure unit of the electric resistance welded pipe manufacturing equipment, the upset amount of the squeeze roller is minimized.

Then, the top roller is moved along a horizontal direction orthogonal to the traveling direction of the coil. That is, by moving the position of the top roller from the upper portion of the squeeze roller, it is possible to eliminate obstacles in the work of exchanging the squeeze roller, and the squeeze roller is a crane provided on the ceiling or the like, and reliably and , Can be replaced quickly.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1, FIG. 2 and FIG. 3 show an embodiment of the present invention.

In the figure, the squeeze roller 1 is inserted into a shaft 15, and is supported by sliders 3 and 3 via rolling bearings (not shown). The horizontal movement of the squeeze roller is such that the rotation of the motor 5 causes the screw shaft 2 to move forward and backward through the worm jack 4 to open and close,
Adjustment is performed when the product size is changed and the upset amount of the pipe 13 is adjusted by the squeeze roller. During steady online operation, the motor is braked and the squeeze roller is fixed in position.

A top roller 6 is arranged directly above the squeeze roller 1, and a roller support 7 for supporting the top roller and a worm jack 8 for finely adjusting the pressing amount of each top roller 6, 6 are attached to the top roller frame 9. There is. The top roller frame 9 is mounted on the top roller elevating base 13 so as to be slidable in the horizontal direction orthogonal to the pipe feeding direction, and the top roller 6 is positioned at the center of the pipe 13 during line operation. Positioning and fixing are performed by a hydraulic cylinder 14 mounted on the top roller elevating base 13.

The top roller 6 elevates, lowers and releases the top roller elevating base 13 via the worm jack 10 by the rotation of the motor 11. The horizontal movement of the top roller frame 9 is performed by the hydraulic cylinder 14.

When an electric resistance welded tube is manufactured by the weld press unit, as shown in FIG. 1, the squeeze roller 1 and
The top roller 6 is set to a predetermined pipe size by the position adjusting mechanism of each roller, and the linear joint portion of the pipe 13 is heated / compressed by a heating means such as low frequency / high frequency resistance or high frequency induction. Then, the electric resistance welded pipe is continuously manufactured.

When replacing the squeeze roller due to dimensional change of manufactured ERW pipe or surface damage of squeeze roller, motor
11 is operated to move the top roller elevating base 13 up and down to a position where it does not interfere with the squeeze roller 1 even if the top roller 6 is moved in the horizontal direction via the worm jack 10. Then, as shown in FIG. 2, the hydraulic cylinder 14 moves the top roller frame 9 in the horizontal direction. The horizontal movement of the top roller frame 9 causes the squeeze roller to be hung by a crane or the like above the squeeze roller 1. Obstacles to raise are eliminated and the squeeze roller is 1 '
You can easily pull it out from Shaft 15 like above.

Next, when incorporating a new roll, the procedure is the reverse of that for removing a new roll.

According to the present embodiment, the moving portion is only a small portion of the weld roller unit, such as the top roller frame 9 and the top roller 6 attached thereto, which is a light weight portion. Is economically effective without large size and complexity.

〔The invention's effect〕

According to the present invention, when the squeeze roller is replaced, the obstacle on the upper part of the squeeze roller can be removed, and the replacement work can be performed efficiently and safely.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of the present invention, FIG. 2 is a state view in which a top roller frame is moved horizontally, FIG. 3 is a side view of FIG. 1, and FIG. It is a front view of an example. 1 ... Squeeze roller.

Claims (1)

[Claims] 1. A pair of squeeze rollers that bend a coil in a curved shape to heat a joint portion of the coil and laterally press the joint portion of the coil, and a top roller that presses the joint portion of the coil from above. In the weld pressure unit of the electric resistance welded pipe manufacturing equipment for manufacturing the electric resistance welded pipe by running the coil between the and, the pair of squeeze rollers are respectively supported by sliders, and an upset amount is set according to the diameter of the coil. The top roller is adjustable, and the top roller is supported by a lift base configured to be slidable along a horizontal direction orthogonal to the traveling direction of the coil via a top roller frame. Is movable along a direction orthogonal to the horizontal plane of the running direction of the coil, the weld pressure of the electric resistance welded pipe manufacturing facility. Over unit.