JPH077818U - Clearance adjusting device for bead cutting roll in bead scraping device for welded steel pipe - Google Patents

Abstract

(57) [Summary] [Purpose] To improve the drawbacks of the conventional bead scrapping device, and to properly adjust the clearance of the bead cutting roll according to the shape and material of the bead to eliminate abrasion of the bead and to cut the bead. Provided is a bead scrapping device capable of extending the life of a roll. [Structure] In a device for forcibly supplying the bead generated during the welding process of steel pipes into a tooth-shaped bead cutting roll in a bead scraping treatment line to finely scrape it, a spring is provided between the roll bearings of the bead cutting roll. And a hydraulic cylinder is installed in a direction in which the bead cutting roll is pressed, and a clearance adjusting device for a bead cutting roll in a bead scraping device for a welded steel pipe. [Effect] The drawbacks of the conventional bead scrapping device have been improved, restrictions in narrow spaces have been eliminated, operability and safety have been improved, and proper roll clearance can be easily set, and bead cutting roll wear and The damage is drastically reduced and the roll life can be extended.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a clearance adjusting device for a tooth-shaped bead cutting roll in a welded steel pipe bead scraping device for scraping the beads generated in the welding process of ERW steel pipe in a continuous line.

[0002]

[Prior art]

 FIG. 5 shows a conventional device disclosed in Japanese Patent Publication No. 3-21282, "Internal bead automatic scrap treatment device for welded steel pipe". First, the conventional device will be described with reference to the overall plan view of FIG. 5. On the pipe making line, the bead cutting and pinching device 1, the pinch roll 7, and the bead force guide 3 are arranged from the inlet side, and the force is paid out on the transport table 8. A plurality of kickers 4 are installed in the traveling direction of the transfer line. There is a bead scraping treatment line on the discharge side of the pipe after cutting off the pipe making line, and on the scrapping treatment line, a bead scraping device is located in the middle of the bead cutting sandwiching device 1 and the bead forced guide 3. 2 and the forced bead guide 3 and the dispensing table 9 have a vibrating bead guide 6, and a plurality of stoppers and kickers 5 are arranged in the pipe length direction in the dispensing table on the same line.

FIGS. 3 and 4 are a front view and a side view of the conventional bead scrapping device 2. The bead 12 shifted to the bead scraping process line is pressed down by the cylinder 10 against the bead pressing roll 11, and the bead 12 is forcibly supplied into the bead cutting roll 14 by the rotation of the bead supply roll 13. The bead cutting roll 14 is rotated by a drive motor 15. Then, the bead 12 is finely scrapped by the tooth-shaped bead cutting roll 14. FIG. 2 is an enlarged view of the bead cutting roll 14. The tooth-shaped bead cutting roll 14 is fixed to the other roll, and one roll is moved horizontally by the adjusting screw 16 to adjust the clearance of the roll 14. It is supposed to do. Conventionally, the method for adjusting the clearance of the bead cutting roll 14 in this bead scraping device has been performed by moving the bead cutting roll on the non-fixed side by means of an adjusting screw 16 and an adjusting spring 17. That is, the cutting reaction force of the bead 12 is absorbed by the adjusting spring 17, and the clearance depending on the shape and material of the bead 12 is determined by setting the bead cutting roll 14 with the adjusting screw 16.

[0004]

[Problems to be solved by the device]

 However, in the above-mentioned conventional method, the reaction force of the adjusting spring 17 is large and the installation location of the device is restricted, so that the operability is poor, and therefore it is difficult to obtain an appropriate roll clearance, and the bead is worn due to the abrasion of the roll. There is a drawback that the life of the cutting roll 14 becomes short.

The present invention improves the drawbacks of this conventional bead scrapping device, and it is possible to prolong the life of the bead cutting roll by properly adjusting the clearance of the cutting roll according to the shape and material of the bead. Provided is a clearance adjusting device for a bead cutting roll in a simple bead scraping device.

[0006]

[Means for Solving the Problems]

 To achieve the above object, the gist of the present invention is to shift the bead generated in the welding process of steel pipes to a bead scrapping treatment line, and press down the bead pressing roll with a cylinder to turn the bead into a bead supply roll. In a device in which the beads are forcibly fed into the tooth-shaped bead cutting roll by the rotation of the bead supply roll and finely scraped, a spring is arranged between the roll bearings of the bead cutting roll, and A bead cutting roll clearance adjusting device in a bead scraping device for welded steel pipes, in which a hydraulic cylinder is installed in a direction in which the bead cutting roll is pressed.

The present invention will be described below with reference to the drawings. FIG. 1 is a front view of a clearance adjusting device according to the present invention. Reference numeral 18 denotes a hydraulic cylinder, to which hydraulic oil is supplied from a hydraulic hose 21, which is attached in place of the conventional adjusting screw 16. Reference numeral 19 is a spring, which balances the hydraulic cylinder force.

Then, the chock of the fixed bead cutting roll 14 is fixed by the fixing bolt 20, and the chock of the moving bead cutting roll 14 is pressed by the hydraulic cylinder 18 to be installed between the chocks of the bead cutting roll 14. The spring 19 generates a reaction force, and the pressing force of the hydraulic cylinder 18 adjusts an arbitrary clearance to secure an appropriate clearance.

That is, the pressing force of the hydraulic cylinder 18 receives a reaction force at the time of cutting the bead 12, and the spring 19 absorbs a shock due to a difference in bead shape, and is installed between the chocks of the bead cutting roll 14. By pressing the spring 19 that has been pressed with a hydraulic cylinder, it is possible to remotely secure an arbitrary clearance.

[0010]

【Example】

(1) Target ERW steel pipe: Outer diameter φ34.0 to 114.3 x wall thickness 1.6t to 10.5t (2) Bead cross section size: length 5mm x width 10mm (x average) (3) cylinder Hydraulic pressure: 30 Kg / mm ² (4) Elastic modulus of spring: 12.76 (5) Clearance: 0.3 mm According to the above-mentioned embodiment, the proper clearance can be secured and the life of the bead cutting roll is 180 times that of the conventional one. It has become possible to extend the life from one day to 1000 days.

[0011]

[Effect of device]

 With the bead cutting roll clearance adjusting device of the present invention, the drawbacks of the conventional bead scraping device are improved, restrictions in a narrow space are eliminated, operability and safety are improved, and proper roll clearance is facilitated. Since it can be set to 1, the wear and damage of the bead cutting roll is drastically reduced, and the life of the roll can be extended.

[Brief description of drawings]

FIG. 1 is a view showing a clearance adjusting device for a bead cutting roll of the present invention.

FIG. 2 is a view of a conventional bead cutting roll clearance adjusting device.

FIG. 3 is a front view of a conventional bead scrapping device.

FIG. 4 is a side view of a conventional bead scrapping device.

FIG. 5 is a view of a conventional internal bead automatic scrap treatment device for welded steel pipes.

[Explanation of symbols]

1 Bead cutting and pinching device 2 Bead scraping device 3 Forced bead guide 4 Forced delivery kicker 5 Stopper and kicker 6 Vibratory bead guide 7 Pinch roll 8 Transport table 9 Delivery table 10 Cylinder 11 Bead press roll 12 Bead 13 Bead supply roll 14 Bead Cutting roll 15 Drive motor 16 Adjustment screw 17 Adjustment spring 18 Hydraulic cylinder 19 Spring 20 Fixing bolt 21 Hydraulic hose

Claims (1)

[Scope of utility model registration request] 1. A bead generated in a welding process of a steel pipe is shifted to a bead scraping treatment line, and a bead pressing roll (11) is pressed down by a cylinder (10) to obtain a bead (12).
To a bead supply roll (13) to forcibly supply the bead (12) into the tooth-shaped bead cutting roll (14) by the rotation of the bead supply roll (13) to finely scrape it. A bead scrap of a welded steel pipe, characterized in that a spring (19) is arranged between roll bearings of a bead cutting roll (14), and a hydraulic cylinder (18) is installed in a direction of pressing the bead cutting roll (14). Adjusting device for bead cutting rolls in sizing equipment.