JPS5928414B2 - Pipe welding equipment for making coiled pipes - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the manufacture of tubes, and more particularly to a tube welding apparatus for making coiled tubes by argon arc welding.

The tube welding device that is the subject of the invention can be advantageously used for the production of welded thin-walled tubes with a ratio of external diameter to wall thickness of about 60, and welding can be carried out at a speed of about 15 m/Min.

A known tube welding device for making coiled tubes includes a strip preparation station with a coil magazine, an unwinding machine, a butt welding machine, a forming machine, a welding machine, a cutting machine, a guide mechanism, It has an actuation switch, a mutual feeder, and a winding machine ["Apparatus for coil bending of water and gas pipes using a continuous furnace type welding device", UDC62l. 774.2l. infOr
mtyazhmashSRI. 1-72-9, (Rotuan)].

In the above device, the tube can be continuously coiled by having a guiding mechanism, an actuating switch for dividing the tube into two winders, and a feeder after the cutter.
This device has a fairly complex structure and is troublesome to maintain.
The following equipment is also used in pipe manufacturing in the Soviet Union.

This device consists of a multi-seat rotatable unwinding machine mounted on a stand placed so as to be movable perpendicular to the axis of the device, and a seat of the unwinding machine ( A coil preparation station with a magazine placed in a frame), a connecting machine for connecting the ends of the strip, a forming machine, a welding machine, a tensile cutting machine, and a guide for guiding the tube into the bending rollers. , a coil forming machine having a supply roller, two bending rollers with fixed axes and one bending roller with a movable axis, a mechanism for controlling the latter rollers, and a drive means common to the bending rollers. a receiver having parallel rollers, the rollers of the receiver are fixed to the output shaft of the drive means, the axis of the output shaft is parallel to the axis of the bending roller, and between the receiving rollers, A take-out machine with drive and gripping means is located. However, the above device has a complicated structure, relatively low operational reliability, and a cutting machine placed in front of the bending roller of the coil forming machine controls the guide, supply roller, and bending roller. This is generally unsatisfactory due to reasons such as the need to use additional mechanisms such as mechanisms.

The control mechanism is configured to direct the leading end of the trailing tube into the bending roller, to control the bending roller as the leading end enters the bending zone, and to control the leading end of the trailing tube and the tail end of the bent leading tube. This is necessary to provide sufficient clearance between the bent tube and the bent tube to remove it. Furthermore, in the above device, the receiving roller, which is fixed vertically,
Means are used for removing the bent tube, the means having an independent drive means and a chain drive means with a grasper, when the grasper returns to its original position and the preceding coil. Deformation of the tube can occur when entering between the turns of the coil and the turns of the subsequent coil. The invention aims to improve the structure of the subject device, in which it is possible to separate and take out the produced coil without interrupting the main operation (longitudinal welding). Ru.

Other objects of the invention are to simplify the construction and maintenance of the device and to increase its operational reliability. The device according to the invention comprises a coil preparation station comprising an unwinding window placed movable in a direction perpendicular to the direction of movement of the tube and a magazine made in the form of a reel for holding the wound strip. a coil forming machine with a strip connector, a forming machine, a welding machine, a tensioning machine and a bending roller; a receiving machine with a guide roller having common drive means with the bending roller; and a cutting machine; These places and machines are placed one after the other in the direction of tube movement, and further in the invention the cutting machine is placed after the bending rollers of the coil forming machine in the direction of tube winding and behind the guide rollers of the receiving machine. is placed on a stand made so that it can be tilted with respect to the axis of the bending rollers and is connected via a universal joint to the output shaft of the common drive means.

Preferably, the cutting machine has a stationary guide push cutter through which the tube passes, and a movable cutter positioned movably relative to the outlet of said push cutter.

A tube welding device for making coiled tubes according to the invention allows separation of welded coiled tubes of desired dimensions regardless of the length of the initial strip, and eliminates the need for cumbersome guides, feed rollers, and leading ends of subsequent tubes. It eliminates the need for a mechanism to control the bending rollers when the coil enters the bending zone, is simple in structure and maintenance, has high reliability of various mechanisms, and is easy to transfer the produced coils to intra-factory transportation vehicles. It is.

The present invention will be explained below with reference to embodiments shown in the drawings.

In the figure, the tube welding device according to the invention has a coil preparation station 1 (FIGS. 1 and 2), which is placed so that it can move in a direction perpendicular to the direction of movement of the tube. An unwinder 2 and several coils placed in parallel (
The device furthermore comprises a coil magazine consisting of reels 3 holding the wound strips), a strip connecting machine 4 placed one after the other after the preparation station, a forming machine 5 with non-driven forming rollers.
, a welding machine 6, a tensioning machine 7 with several sets of rollers placed in a common outer body (the axes of these rollers are placed alternately in the vertical and horizontal planes), a coil-forming machine 8 with bending rollers 9 (a three-roller bender is used in the preferred embodiment) and a receiver 10, with an air cylinder 13 (
The cylinder 13 has a parallel receiving roller 11 mounted on a stand 12 which can be tilted relative to the axis of the bending roller 9 by means of a tilting mechanism (FIG. 4); It is hinged to the frame 8 and the base 12 via a joint 14.

The bending roller 9 and the receiving roller 11 have a common drive means 15, the receiving roller 11 being connected via a universal joint 17 to an output shaft 16 of the drive means. The bow tensioner 7 (FIG. 1) of the coil forming machine 8 is driven by an electric motor 18 via a transmission mechanism. The device further includes a cutting machine 19 (Figs. 1 and 3), which cuts the outer body 21 (Fig. 3).
a guide bushing 20 installed within;
A movable cutter 22 is provided at the outlet of the cutter 20 in the direction of movement of the tube so as to be movable in a direction perpendicular to the axis of the cutter 20. placed after the roller 9 in the direction (see Fig. 1).
and Figure 2). The device according to the invention operates as follows.

First, the end of one coil strip is pulled out from a reel 3 mounted on the frame of an unwinding machine 2, and sent to a forming machine 5 via a strip connector 4, where a blank tube is formed.

Next, the blank pipe is sent to a welding machine 6, where both ends of the strip are completely welded, for example, by angone arc welding. The raw tube is transported within the apparatus by the rollers of the tensioner 7. After passing through the tensioner 7, the welded tube is sent to the bending rollers 9 of the coil former 8. The tube end bent to form a winding is passed through a guide pushbutton 20 and fed to receiving rollers 11 (Tc) of a receiving machine 10. As the blank tube is welded, the roller 11 receives the winding of the tube, and then , the coil is formed. When all the coils in one strip are used, the welding is stopped, and the rewinding machine 2 is moved by the moving mechanism to rewind the width of the coil in the direction perpendicular to the axis of the device. After being moved by a distance corresponding to (
The front end of the thread from the coil) is fed to the connecting machine 4 and, after appropriate preparation, is connected to the tail end of the thread from the previous coil, after which welding of the blank tubes begins again. Receiving roller 11
After a predetermined number of turns (turns of the tube coil) have been stored on top, a movable cutter 22 is moved by an air cylinder (not shown) to cut the turn of the blank tube.

A movable cutter 22 is placed at the outlet of the push cutter 20 in the direction of winding of the tube, and the cutting machine is connected to the bending roller 9.
, it is not necessary to insert the tube again into the bending rollers 9 and into the push cutters 20 of the coil former 8. The cut windings (sections) of the produced coil are tilted together with the receiving roller 11 and the platform 12 from the air cylinder 13VC and transferred onto the connecting beam of a factory crane, for example. When these things are done, the welding of the blank tube is not interrupted.The tube welding device according to the invention is simple in structure and can be used to fabricate coils without stopping the operation. and removal, and also eliminates the need to insert the front end of the tube into the coil former.

Also, this device is small in size and easy to maintain.

[Brief explanation of drawings]

FIG. 1 is a plan view of a tube welding device for making coiled tubes according to the present invention, FIG. 2 is a front view of the device, and FIG. FIG. 4 is a front view of the mechanism of FIG. 3. 1... Coil preparation place, 2... Rewinding machine, 3... Reel, 4... Row connection peach 5
...Forming machine, 6...To welding 7...
...Tension machine, 8...Coil forming machine, 9...
... Bending roller, 10 ... Receiving machine, 11.
...Receiving roller, 12...stand, 16.
・・・・Output shaft of the ♂ drive means, 17・・・・Survey joint, 19・・・・Cutting connection 20・・・・Guiding push cutter 1, 22・・・・・・Movable cutter one.

Claims (1)

[Claims] 1. An unwinder 2 arranged so as to be movable in a direction perpendicular to the direction of movement of the tube, and a magazine made in the form of a reel 3 for holding the wound strip. A coil preparation station 1, a coil forming machine 8 comprising a strip connector 4, a forming machine 5, a welding machine 6, a tensioning machine 7 and a bending roller 9, and a guide roller 11 having a common drive means with the bending roller 9. A pipe welding device for making coiled tubes from wound strips, comprising a receiving machine 10 equipped with a cutting machine 19, said places and machines being placed one after another in the direction of movement of the tube, A cutting machine 19 is placed after the bending roller 9 of the coil forming machine 8 in the direction of tube winding, and a guide roller 11 of the receiving machine 10 is placed such that it can be tilted with respect to the axis of the bending roller 9. It is placed on the stand 12, and the universal joint 17
A pipe welding device characterized in that it is connected to an output shaft 16 of a common drive means through a pipe. 2. Claims characterized in that the cutting machine 19 comprises a stationary guide push cutter 20 through which the tube passes, and a movable cutter 22 placed so as to be movable relative to the outlet of the push cutter 20. The pipe welding device according to item 1.