JPH01104419A - Device for straightening deformation of pipe end part - Google Patents

Abstract

PURPOSE:To straighten the deformation of a pipe end over the whole periphery without being regulated by the size of the pipe diameter and to obtain the roundness and straightness of high accuracy by interposing the deformation part of a pipe end by a roll from the inside and outside of a pipe and rotating at least one part of a roll or pipe. CONSTITUTION:The pipe A having the pipe end deformed part B cut by a cutter, etc., is placed on a driven type turning roll C. The sliding platform 6 loading the guide 16 guiding an inner side roll 1 and an outside roil 2 is moved by a hydraulic cylinder 9 on the lift base plate 3 whose height position is adjusted by a lift device 4 and said deformation part B is located between the inner and outer rolls 1, 2. Thereafter the inner side roll 1 is descended with the operation of the hydraulic cylinder 17 to interpose the deformation part B by both rolls 1, 2. The outside roll 2 is then rotated by a driving motor 8. The deformation part B is thus straightened with good accuracy over the whole periphery of the pipe A.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a device for correcting deformation of a tube end cut by, for example, a disk-type traveling cutter.

[Conventional technology]

Steel pipes that have been finished with a specified outer diameter in the sizing process are cut into predetermined lengths by a cutting machine while being fed out continuously at a constant speed. By the way, the end of the pipe after running and cutting exhibits various deformations depending on the cut-off type, and this deformed part is either removed by cutting in the subsequent finishing process, or removed by using a tltl represented by a well-known de-denpla. Measures are being taken to correct the deformed portion. An example of a means for correcting the roundness of a tube end is a tube end expanding device (expander) that is incorporated into a heat exchanger.

(Problems to be Solved by the Invention) However, the conventional dedenplars are used exclusively as small-diameter pipe straightening devices, and moreover, the rRI is such that parts must be replaced due to differences in pipe dimensions.
There was ll. In addition, there are many types of expanders used, but the basic structure of all of them is to insert a roll inside the pipe and rotate it to perform a wave tube action, which is specialized for small diameter pipes. It is a machine,
Pipes in a continuous steel pipe manufacturing plant! XX It cannot be used as a circular orthodontic device.

The present invention has been made to solve the above-mentioned problems, and can be applied without being restricted by the size of the pipe diameter.
Moreover, it is intended to provide a correction 8M that can obtain highly accurate roundness and straightness.

[Means for solving problems]

The present invention includes a pair of oppositely positioned rolls disposed inside and outside a deformed portion of a tube end, a tube pinching mechanism (a) for pinching the deformed portion (-a mechanism for operating at least one of the pair of rolls, and a mechanism for pinching the deformed portion); This paper proposes a tube end deformation correcting device H that is equipped with a rotation mechanism that rotates at least one of the following.

Although the shape of the outer roll is not particularly limited, it is preferable to use one having a seven-rank portion at one end that contacts the end face of the tube.

〔Example〕

The present invention will be described below based on embodiments shown in the accompanying drawings.

FIG. 1 illustrates a specific configuration of the present invention. In the figure, (A) is a steel pipe to be straightened having a deformed tube end portion (B) cut by, for example, a disk-type traveling cutter, and (I) is an inner roll inserted into the deformed portion (I3); are the outer rolls opposite to the inner rolls, each having a required diameter and length.In other words, in the present invention, the inner and outer rolls (1) and
) is compressed and rotationally driven to apply a straightening action to the entire circumference of the end, and at this time, the so-called clamping action that reduces the roll interval is performed by either or both of the inner and outer rolls (!) and ■. It is sufficient to move the rollers in the direction perpendicular to the tube axis, and for rotation, the inner and outer rolls (
The intended corrective action can be achieved by rotating at least one of 1), 2, and the tube (A). In other words, this embodiment shows a case in which the inner roll (1) performs pinching and the outer roll is driven to rotate, and the device is configured to be moved relative to the tube to be straightened (A).

That is, ifF (A) is a driven turning roller (C)
After placing the HWl on top, move the HWl forward and roll the
! ) and ■, the tube end deformed portion (B) is located between. Here, by rotating the outer roll (2) while applying a pinching action and reduction to the inner roll (1),
The deformed portion (B) is continuously corrected over the entire circumference. In addition, when the left and right roller spacing of the driven turning roller (C) is constant, the height of the bottom of the tube will vary depending on the diameter of the tube (A). Therefore, this height and the outer roll (2
) is provided to match the surfaces of the Also,
In this embodiment, as described above, the entire device is moved back and forth, but the device may be fixed and the tube (A) moved back and forth, and the outer roll (2) can be moved up and down. Of course, instead of the position, a mechanism for adjusting the position may be provided on the turning roller side.

Next, -(3) is the elevating platform plate, which is the elevating device (4).
) is supported horizontally above the base so that it can be raised and lowered, and a movable table (6) is slidably placed on the upper surface of the base. In other words, this moving platform (e) is provided to move the outer roll (2) installed on it and the drive motor (8) directly connected to the end of the roll shaft ('7) forward and backward. Its operation is provided by a hydraulic cylinder (9).As explained earlier, the lifting device (4) is provided to adjust the height of the outer roll (2) according to the diameter of the pipe to be straightened. The rotation of a drive source Ql such as a hydraulic motor is taken out via an operating shaft QD,
A mechanism is used in which this is transmitted to a gear and screw mechanism (not shown) housed in the box Q3, and the shaft (2) supporting the elevating table (3) is expanded and contracted.

04 is a bearing portion that rotatably supports the support shaft 09 of the inner roll (1), and this is mounted on the movable table (6).
It is located inside a gate-shaped guide 0e that stands straddling the roll axis ■ of the outer roll ■, and is firmly held by this circular guide QG, and is moved up and down by a hydraulic cylinder 07) using this as a guide. ing. In other words, the inner roll (
The deformed portion pinching (rolling down) mechanism according to 1) is configured.

As described above, in the embodiment shown in FIG. ) and ■ at appropriate positions relative to the deformed part (Ill) of the pipe (A), and while applying clamping force to the inner roll (1) with the hydraulic cylinder 〇''D, turn the drive motor (
8) to rotate the outer roll (■). In this case, the tube (A) rotates while being subjected to a squeezing action, and correction is applied over its entire circumference.

In addition, Fig. 3 (a) shows the length of the deformed part (B,) of the pipe (A), that is, the cutting length (LI) when no straightening is performed.
, and Figure (b) shows the cut length (L yo) left at the end of the tube after straightening, and according to the experimental results of straightening using the device of the present invention, the above-mentioned (L, )
, (L, ) are as shown in Table 1, and it was demonstrated that the yield rate for the length of the steel pipe product was significantly improved.

The following margin table 1m2 is a schematic diagram showing another embodiment of the present invention. 1st
The shape of the outer roll of HH shown in the figure is slightly modified, and a device is used in which one end of the outer roll (2) is provided with a flange (2') that contacts the end surface of the steel pipe (A). do.

In this example, the tube end deformation part (B) is located between the inner roll (1) and the outer roll (2), and the tube end surface is brought into contact with the flange part (2') of the outer roll (2) to perform rolling. By rotationally driving the deformed portion (B) while adding
This is to correct the entire circumference of the tube, and also to crush the sharp convex protrusion portion (D) formed on the tube end surface toward the inner circumference.

According to this embodiment, it is possible to prevent the pipe end face from colliding with the rubber surface for the material transfer end stopper and cause it to bite into the rubber surface during conveyance by the roller conveyor after straightening, and to improve the cutting efficiency of the pipe end face.

FIG. 3(C) shows the cut length (L,) left on the tube end after straightening in this example.
L,) is as shown in Table 2, and the length of the tube end cut-off portion remaining after processing was further reduced.

Table 2 [Effects of the Invention] According to the present invention, the deformed portion of the tube end is rotated while being compressed by the inner and outer rolls, and the straightening process is applied equally over the entire circumference, regardless of the size of the tube diameter. applicable,
Highly accurate roundness and straightness can be obtained. Therefore, the length of the tube end cut-off portion remaining after processing is reduced, and the yield is significantly improved, which has a great economic effect.

[Brief explanation of the drawing]

Fig. m1 is an explanatory diagram showing an embodiment of the present invention, Fig. 2 is a schematic diagram showing another embodiment of the present invention, and Fig. 3 is an explanatory diagram showing the length of the tube end shape removed before and after correction. It is a diagram. A...Pipe B...Deformed part D...Pipe end projection part G...Inner roll 2...Outer roll 2'...Flange part 6...Sliding base
8... Drive motor 9.17... Hydraulic cylinder 14... Bearing part 16... Guide

Claims (2)

[Claims] (1) A pair of oppositely positioned rolls disposed inside and outside the deformed portion of the tube end, a tube clamping mechanism that operates at least one of the pair of rolls to squeeze the deformed portion, and at least one of the rolls or the tube. A tube end deformation correction device comprising a rotation mechanism for rotating the tube end portion. (2) The tube end deformation correction device according to claim 1, wherein one end of the outer roll of the pair of rolls is provided with a flange portion that comes into contact with the tube end end surface.