JPH07265953A - Method and device for controlling position of guide in roll straightening machine for metal rod - Google Patents

Abstract

PURPOSE:To effectively and efficiently correct the position of a guide by measuring the distance from the reference position to a guide by a non-contact type displacement gage provided on the inlet or outlet side of a straightening roll, and correcting the position of the guide so as to correspond to the diameter of a metal rod by this measurement result. CONSTITUTION:Guides 3a, 3b on both the right and left sides are not uniformly worn but worn in a certain wear pattern according to usually the arrangement of the equipment on a line and the condition of installation of a correcting roll 2. For example, the guide 3a on the drive side and the guide 3b on the operator side are worn on the inlet side and on the outlet side respectively. Non-contact type displacement gages 4a, 4b are arranged on the side opposite to the part to be worn, the distance from the reference position to the guide 3, i.e., the condition of the wear is measured by making use of the timing immediately after the material 1 under operation passes a correcting roll 2, and the guide position is corrected based on these results of measurement to always realize the appropriate guide position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a guide position control method and apparatus in a roll straightening machine for straightening the distortion of a rod-shaped metal material (hereinafter, also simply referred to as a material) such as a pipe or a steel bar.

[0002]

2. Description of the Related Art The correction of strain in a rod-shaped metal material such as a pipe or a steel bar is disclosed in, for example, JP-A-61-159235 or JP-A-62-1304.
It is common to use a roll straightener as shown in Japanese Patent No. 24. The roll straightening machine has a pair of upper and lower straightening rolls whose rotation axes are diagonally opposite to each other in the feeding direction of the material and arranged in series, and the material is passed through the gap between the pair of straightening rolls. Then, the material is rotated while being bent, and while passing through the roll gap, compression and tension are alternately applied to the material to cause plastic deformation, thereby performing straightening.

FIG. 6 is a front view showing a roll arrangement of a multi-roll type round bar straightening machine described in JP-A-62-230424, and FIG. 7 is a plan view of the same, in which 1 is a material and 2a and 2b are a pair. A straightening roll, 2a is a convex roll, 2b is a concave zigzag roll, each rotation axis is attached at an oblique angle θ upside down with respect to the traveling direction of the material indicated by the arrow, and the zigzag roll The rolls are assembled so that the unevenness is turned upside down for each pair.

3a and 3b are provided along the material in the gaps on both sides of the pair of upper and lower straightening rolls 2a and 2b, and guide the material so that the material does not escape in the left and right direction but advances in the correct direction with respect to the roll. Be a guide. FIG. 8 shows the same Japanese Patent Laid-Open No. 62-2304.
It is a sectional side view seen from the advancing direction of the material described in Japanese Patent No. 24. The guides 3a, 3b arranged on both sides of the material in the horizontal direction are
Since it is attached to the long hole 31 provided in the support base 30 via the entrance / exit adjustment bolts 32, and the support base 30 is attached to the nut 34 that can be raised and lowered by the adjustment screw 33, the position is adjusted in the horizontal direction and the vertical direction. Is possible.

FIG. 4 is a side view showing only a pair of straightening rolls of the continuous roll straightening machine as seen from the material advancing direction, and FIG. 5 is a front view seen from the horizontal direction at right angles thereto. In the following description, when distinguishing the guides on both sides in the horizontal direction,
3a is called a drive side guide and 3b is called an operator side guide. Normally, the positions of the guides 3a and 3b are set by setting the contact point between the two in the absence of the material as a zero point and retracting the respective guides according to the diameter of the material passing therethrough. However, since the guides 3a and 3b are constantly worn due to contact with the material, the wear amount should be regularly measured,
Although it is necessary to move the guide forward to adjust the position according to the measurement result, it is difficult to directly measure the amount of wear of the guide, so it is difficult for the worker to observe the operating condition, that is, the passing rod condition and the correction condition. According to the experience, fine adjustment is actually performed, and the guide position is not appropriate, so the material escapes in the left and right directions, and effective correction cannot be performed, resulting in a decrease in correction efficiency.

[0006]

SUMMARY OF THE INVENTION According to the present invention, the wear amount of a guide is quantitatively measured in real time by a non-contact displacement meter by utilizing the timing immediately after a material passes a straightening roll. An object of the present invention is to realize a position control method and device for grasping and correcting a guide position to an appropriate value to perform effective and efficient correction.

[0007]

A method for controlling the position of a guide in a roll straightening machine for a rod-shaped metal material of the present invention is a roll straightening machine for a rod-shaped metal material having guides on both sides in the horizontal direction between a pair of upper and lower straightening rolls. With a non-contact type displacement gauge provided on the entrance side or the exit side of the straightening roll, the distance from the reference position to the guide is measured, and the position of the guide is adjusted so as to correspond to the diameter of the rod-shaped metal material by this measurement result. It is characterized by correction.

Further, the guide position control device in the roll straightening machine for rod-shaped metal material of the present invention is a roll straightening machine for rod-shaped metal material having a pair of upper and lower straightening rolls and guides provided on both sides in the horizontal direction of the straightening rolls. In, a non-contact type displacement gauge provided at a substantially horizontal position facing the guide on the entrance side or the exit side of the straightening roll, and the guide of the guide so as to correspond to the diameter of the rod-shaped metal material from the measurement result by this displacement gauge. It is characterized in that it comprises an arithmetic unit for performing a comparison operation with the position and a moving means for changing the position of the guide from the operation result.

[0009]

[Operation] The guides on the left and right sides do not wear evenly, but take a certain wear pattern depending on the equipment layout of the normal line and the roll installation status. For example, in the guide shown in FIG. 1, it is assumed that the guide 3a on the drive side is worn on the input side and the guide 3b on the operator side is worn on the output side, and the wear allowance is shown by diagonal lines.

According to the present invention, the non-contact type displacement gauges 4a and 4b are arranged on the opposite side of such a worn portion, and the reference position is utilized by using the timing immediately after the running material passes through the straightening roll. The distance from the guide to the guide, that is, the wear condition is measured, and the guide position is corrected based on this result, so that the proper guide position is always realized.

[0011]

EXAMPLE A case in which the present invention is applied to a pair of upper and lower roll straighteners shown in FIGS. 4 and 5 will be described. As described above, FIG. 4 is a side view showing only a pair of straightening rolls of the continuous roll straightening machine as seen from the material advancing direction, and FIG. 5 is a front view as seen from the horizontal direction at right angles thereto.

FIG. 1 is a plan view showing this embodiment, FIG. 2 is a sectional view taken along the line AA in FIG. 1, and FIG. 3 is a block diagram showing a signal processing system. 1 is a material, 2 is a straightening roll, 3 Is a guide,
4 is a displacement meter, 5 is a calculator, 6 is a guide wear amount display device,
Reference numeral 7 is a guide position control device, and 8 is an alarm. In FIG. 1, the straightening rolls 2a and 2b are omitted. Also, guide 3a,
3b is supported by a hydraulic mechanism (not shown) so as to be able to move forward and backward at an arbitrary position in the material direction indicated by an arrow in FIG.

In the roll straightening machine of this embodiment, the guide side 3a on the drive side tends to wear on the inlet side end and the guide side 3b on the operator side tends to wear on the outlet side with respect to the traveling direction of the material. Therefore, non-contact type displacement gauges 4a and 4b are arranged on the opposite side of the heavily worn portion shown by the diagonal lines in FIGS. 1 and 2, and the timing immediately after the material under operation has passed the straightening roll is used to start from the reference position. Measure the distance to the guide, that is, the wear condition.

As the non-contact type displacement gauges 4a and 4b, any of a laser range finder, an air micrometer, an ultrasonic range finder and the like may be used, but guides worn in an arcuate section corresponding to the curvature of the material. It is necessary to measure the position of the deepest part of the inner surface. In FIG. 3, a non-contact displacement gauge 4a, which is a non-contact type displacement gauge 4a, is provided with an initial setting value (d) of the guide interval based on the diameter of the material to be straightened and a guide wear limit value (c) from an unillustrated upper computer. The measurement results from 4b are compared with the calculators 5a and 5b respectively, and signal processing is performed in the guide wear amount display device 6, and the judgment information such as the part of the guide being measured, the wear amount, and the wear limit is sent to the CRT. Display at any time. The set values (c), (d)
Can be set while watching this CRT.

When the measurement result from the non-contact type displacement gauges 4a and 4b does not reach the set wear limit amount, the guide position control devices 7a and 7b which are the moving means and the signals from the guide position control devices 7a and 7b are operated. The guide is advanced by the hydraulic solenoid valve SV and the hydraulic mechanism. If the measurement result reaches the set wear limit amount, a warning is issued by alarms 8a and 8b such as a lamp and a buzzer, and the guide is replaced with a new one.

Since the wear of the guide does not proceed so rapidly, it is not necessary to measure the distance by the non-contact type displacement gauges 4a and 4b for each material, and dozens or hundreds. There is no practical problem if it is done once for each book. Also,
In this embodiment, the hydraulic mechanism is used as an example of the guide position moving means. However, as the moving means, an electric screw feed mechanism, a worm gear mechanism, or any other linear feed mechanism may be used.

[0017]

According to the present invention, there is an excellent effect that the amount of wear of the guide is actually measured and the guide position is appropriately corrected so that effective and efficient correction can be always performed.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along arrow AA in FIG.

FIG. 3 is a configuration diagram showing a signal processing system according to an embodiment of the present invention.

FIG. 4 is a side view showing a roll arrangement in the roll straightening machine according to the present invention.

FIG. 5 is a front view showing a roll arrangement in the roll straightening machine according to the present invention.

FIG. 6 is a front view showing a roll arrangement in a conventionally known roll straightening machine.

FIG. 7 is a plan view showing a roll arrangement in a conventionally known roll straightening machine.

FIG. 8 is a side sectional view showing a conventional technique.

[Explanation of symbols]

 1 Material 2 Straightening roll 3 Guide 4 Displacement meter 5 Computing unit 6 Guide wear amount display device 7 Guide position control device 8 Alarm 30 Support stand 31 Long hole 32 Entry / exit adjustment bolt 33 Adjustment screw 34 Nut

Claims (2)

[Claims] 1. In a roll straightening machine for a rod-shaped metal material having guides on both sides in the horizontal direction between a pair of upper and lower straightening rolls, a reference position is determined by a non-contact type displacement gauge provided on the entrance side or the exit side of the straightening roll. A method for controlling the position of a guide in a roll straightening machine for a rod-shaped metal material, comprising: measuring the distance from the guide to the guide, and correcting the position of the guide so as to correspond to the diameter of the rod-shaped metal material based on the measurement result. 2. A rod-shaped metal roll straightening machine having a pair of upper and lower straightening rolls (2a, 2b) and guides (3a, 3b) provided on both sides of the straightening rolls (2a, 2b) in the horizontal direction, Guides (3
a, 3b) a non-contact type displacement meter (4a, 4b) provided at a substantially horizontal position, and a calculation for comparing with the position of the guide corresponding to the diameter of the rod-shaped metal material from the measurement result by this displacement meter A guide position control device in a roll-shaped straightening machine for a rod-shaped metal material, characterized in that it comprises a container (5a, 5b) and a moving means (7a, 7b) for changing the position of the guide from the calculation result.