JP2518824Y2 - Clamp segment exchange device for steel pipe cutting machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a clamp segment replacement device for a steel pipe cutting machine in an electric resistance welded pipe manufacturing facility or the like.

[Conventional technology]

Generally, in a steel pipe cutting machine that cuts a steel pipe with a milling cutter of a bicycle, a clamp segment provided in a clamp stand is brought into contact with substantially the entire outer circumference of the steel pipe to clamp and support the steel pipe while the steel pipe is clamped to the clamp center. Cutting is performed while rotating concentrically, or cutting is performed while rotating the milling cutter around the clamp center without rotating the steel pipe. Whichever cutting method is used, when the size of the steel pipe is changed, the radius of curvature of the outer circumference of the steel pipe changes, and therefore the steel pipe must be replaced with a clamp segment having the same radius of curvature so that the steel pipe can be reliably clamped.

Conventionally, as shown in FIG. 4, in a steel pipe cutting machine, a fixed guide roller stand 24, a guide roller stand 25, and a clamp stand 2 are sequentially arranged in the material path direction, and as described in JP-B-63-32568. , Clamp stand 2
A plurality of clamp segment mounting clamp bases are arranged at positions having the same radius and equiangular intervals centered on the center of the material pass line, and the clamp bases are centered on the material pass line by the clamp cylinder 4 via the wedge mechanism. The clamp segment is provided so as to be able to move forward and backward, and the clamp segment is slidably engaged with each clamp base in the material pass direction and bolted.

For this reason, after removing the bolts, the clamp segments must be slid along the clamp base to be removed and carried out.The main method is to remove the clamp segments one by one using a crane with a rod. Method of carrying out, method of using clamp exchange jig to slide and move the clamp segment inside, and carrying out the clamp segments together by clamp exchange jig, or clamp segment as described in Japanese Patent Publication No. 63-32568 There is a method to mechanically remove and carry out the clamp segments collectively using an automatic exchange device. In this method, a clamp segment exchange jig was installed on the material input side of the clamp stand instead of the guide roller stand. .

[Problems to be solved by the device]

Since the method requires completely individual manual work, it took a long time to replace the clamp segment, resulting in poor work efficiency. In the method, it seems that the work efficiency is good because it is a batch delivery method although it is manual work, but it is necessary to replace the clamp segment in order to remove the guide roller stand and install a large clamp segment replacement jig equivalent to this. It took a long time and the work efficiency was poor. In addition, the method requires the use of a special device, and it is necessary to install the steel pipe clamping device in the steel pipe cutting machine so that it can be moved laterally to a position corresponding to the automatic clamp segment changing device, which reduces equipment costs. The inconvenience of this was inevitable.

[Purpose of device]

This invention was made to solve the problems in the above method using a clamp segment replacement jig.By using the guide roller stand as part of the clamp segment replacement jig, the clamp segment replacement time can be shortened. The purpose is to improve work efficiency.

[Means for solving the problem]

The clamp segment exchanging device for a steel pipe cutting machine according to the present invention, as shown in FIGS. 1 to 3, has the same radius and equiangular intervals centered on the center of the material pass line L in the clamp stand 2. Clamp base 1 for mounting a plurality of clamp segments that can move forward and backward with respect to the center of the material pass line L, and for guiding the clamp segment at a position where the distance from the center of the pass line and the position of the retract base at the retracted end position at the material entry side are equal. With the sub-base 9 provided,
In a steel pipe cutting machine in which a guide roller stand 11 having a guide roller 15 for guiding a material on the upper portion is provided on the material entrance side of the clamp stand 2, the guide roller 15 is provided so as to be retractable into the guide roller stand 11. A clamp segment replacement jig 17 is detachably attached to the upper part of the roller stand 11, and this clamp segment replacement jig is attached.
It is characterized in that a storage base 18 for holding a clamp segment is provided at a position where the distance between the clamp base 1 and the sub-base 9 and the center of the pass line is the same in the space 17.
The above object is achieved by such a configuration.

〔Example〕

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

In the drawing, reference numeral 1 denotes a clamp base, which is arranged along the material pass line L direction at positions having the same radius and equiangular intervals centered on the center of the material pass line L in the clamp stand 2.

Reference numeral 3 denotes a wedge operation ring, which is connected to a clamp sill ring 4 provided on the clamp stand 2 and is provided on the material entry side of the clamp stand 2.

Reference numeral 5 denotes a slide wedge, which is provided in the clamp stand 2 at a position outside the clamp base 1 in the radial direction, respectively, and is integrally connected to the wedge operation ring 3 by a connecting rod 6.

Reference numeral 7 denotes an interlocking rod, which is provided radially outside the clamp base 1 in the clamp stand 2 along the radial direction, and is engaged with the wedge portion of the slide wedge 5 at the outer end while being slanted. , Is integrally connected to the clamp base 1 at the inner end.

Then, the slide wedges 5 are connected to the material pass line L by the clamp sillings 4 via the wedge operating rings 3.
The clamp bases 1 can move in synchronism with each other through the interlocking rod 7 in synchronization with the direction, and can move forward and backward in synchronization with the center of the material pass line L.

Reference numeral 8 denotes a clamp segment, which is slidably engaged with each clamp base 1 in the material path direction and fixed by a bolt.

Reference numeral 9 denotes a sub base, which is provided on the material entry side (inside the wedge operating ring 3) in the clamp stand 2 with the same distance from the center of the pass line as the clamp base 1 at the retracted end position.

Reference numeral 10 is a cone guide, which is detachably provided inside the sub-base 9 in the clamp stand 2.

Reference numeral 11 denotes a guide roller stand, which is provided on the material entering side of the clamp stand 2.

A bracket 12 is vertically movably attached to a guide 13 provided in the lower portion of the guide roller stand 10 and is connected to a screw jack 14.

A guide roller 15 is attached to the bracket 12 with a pin 16.

The guide jack 15 is arranged at a predetermined position above the guide roller stand 11 by the screw jack 14 so that the guide roller 15 can guide the material M on the material pass line L, or a predetermined position inside the guide roller stand 11. The guide roller 15 is retracted to the upper part of the guide roller stand 11 so that a clamp segment replacement jig 17 described later can be mounted.

Reference numeral 17 is a clamp segment replacement jig, which is formed in a ring body having a space for accommodating the clamp segment, and has storage bases 18 at positions having the same radius and equal angular intervals therein.
Are arranged along the material pass line L direction. One clamp segment replacement jig 17 is prepared for detaching the clamp base 1 and one for the assembly.

The guide roller 15 can be mounted on the upper portion of the guide roller stand 11 with the bolts 19 and the nuts 20 while the guide roller 15 is retracted inside the guide roller stand 11, and at the time of mounting, the storage base 18 and the retracted base 18 are retracted. It is provided so that the distances between the end positions of the clamp base 1 and the center of the pass line are equal.

In this embodiment, the steel pipe clamping device in the steel pipe cutting machine of the type in which the steel pipe M is cut while rotating the milling cutter 21 that is rotating without rotating the steel pipe M around the clamp center (center of the material pass line L). However,
Also applied to the steel pipe clamp device in a steel pipe cutting machine that cuts while rotating the steel pipe in a clamped state by stopping and holding the rotation of the wedge operating ring 3 and the wedge mechanism (5, 6, 7) at a predetermined position. It goes without saying that you can do it.

In the above configuration, when exchanging the clamp segment 8, first, the guide roller 15 is pulled into the guide roller stand 11, and the cone guide 10 is removed from the outside of the clamp stand 2.
Mount the clamp segment replacement jig 17 on the upper part of.

Then, the wedge mechanism is operated by the clamp silling 4 through the wedge operating ring 3 to release the clamp,
The clamp base 1 and the clamp segment 8 are moved to the open limit (cylinder stroke end).

In this state, the bolts are removed and the clamp segment 8 is slid from the clamp base 1 to the sub base 9 to the storage base 18 and stored in the clamp segment replacement jig 17.

After all the clamp segments 8 are housed in the clamp segment replacement jig 17, the clamp segment replacement jig 17 is removed from the upper part of the guide roller stand 11 and carried out by a crane.

Next, the clamp segment exchange jig 17 accommodating the clamp segment 8 having a predetermined radius of curvature is carried in by a crane and attached to the upper part of the guide roller stand 11.

In this state, the clamp segment 8 is pushed onto the clamp base 1 in the clamp stand 2 and fixed by bolts in the reverse order of the above.

After that, the clamp segment replacement jig 17 is removed from the upper part of the guide roller stand 11 and carried out by a crane.
Then, the cone guide 10 is attached to the inside of the clamp stand 2 to complete the exchange of the clamp segment 8.

[Effect of device]

As described above, according to this invention, the guide roller is provided so as to be retractable in the guide roller stand, the guide roller is retracted in the guide roller stand, and the clamp segment replacement jig is installed on the upper portion of the guide roller stand. , The guide roller stand can be used to make the clamp segment replacement jig simple and lightweight,
The crane can be easily loaded and unloaded, and the clamp segment can be immediately replaced by installing the clamp segment replacement jig and opening the clamp. Therefore, the clamp segment replacement time can be shortened, the work efficiency can be improved, and the equipment can be simplified.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional front view showing an embodiment of the present invention after a clamp segment exchange jig is installed, FIG. 2 is a left side view of FIG. 1, and FIG. FIG. 4 is a front cross-sectional view of a partial appearance showing an embodiment of the present invention before a clamp exchange jig is installed, and FIG. 4 is a front view showing a conventional example. L: Material pass line, 1 ... Clamp base, 2 ...
Clamp stand, 3 …… wedge operating ring, 4 ……
Clamp silling, 5 …… Slide wedge, 6 …… Connecting rod, 7 …… Interlocking rod, 8 …… Clamp segment, 9 …… Sub base, 10 …… Cone guide, 11 …… Guide roller stand, 12 …… Bracket , 13 …… guide, 14 …… screw jack, 15 …… guide roller, 16
...... Pin, 17 …… Clamp segment replacement jig, 18 ……
Storage base, 19 ... Bolts, 20 ... Nuts.

Claims (1)

(57) [Scope of utility model registration request] 1. A clamp base for mounting a plurality of clamp segments, which can move forward and backward with respect to the center of the material pass line, and material inserts at positions having the same radius and equiangular intervals centered on the center of the material pass line in the clamp stand. A sub-base for guiding a clamp segment is provided at a position where the distance from the center of the pass line is equal to that of the clamp base at the retreat end position in the side position, and a guide roller stand provided with a guide roller for material guide is provided at the upper part of the material of the clamp stand. In the steel pipe cutting machine installed on the entry side, the guide roller is provided so that it can be pulled into the guide roller stand, and the clamp segment replacement jig is detachably attached to the upper part of this guide roller stand. , The distance from the center of the pass line to the clamp base and sub base For steel cutting machine, characterized in that a housing base clamp segments held in correct position clamping segments changer.