JPH08281328A - Coiling machine of tube and method thereof - Google Patents

Abstract

PURPOSE: To quickly execute speed control by detecting tube locus with a tube locus detector arranged between a preliminary tube bending machine and coiling drum and inputting the signal to a tube feeding speed control device. CONSTITUTION: A tube 1 is fed in a coiling drum at a prescribed speed with a feed roll 21 of a tube feed mechanism 2. The tube is bent by a tube preliminary bending mechanism 3 beforehand so as to coincide with the curvature of drum 4. A tube locus detector 7 is arranged at the part between the tube preliminary bending mechanism and coiling drum 4, at which the tube 1 passes. The tube locus detector 7 pinches the tube 1 with guide rolls 71, 72 and detects the passing position of tube 1. A speed controller 6 receives the detected value of tube locus detector 7, compares with the reference value of ideal locus and controls the speed of feed roll 21. Because the tube 1 is corrected to ideal locus before coiling to the coiling drum 4, the collapse of tube 1 due to abrupt bending is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tube winding device and method. In the present invention, the “tube” refers to a copper pipe, an aluminum pipe, other metal pipes, a square pipe, a round pipe, or the like, and a linear body that undergoes material deformation and is not restored.

[0002]

2. Description of the Related Art FIG. 3 shows an example of a conventional pipe winding device, in which a pipe feeding mechanism 2, a pipe pre-bending mechanism 3 and a winding drum 4 are arranged from the upstream side along the flow of the pipe 1. Is
A speed control device 6 is attached to the pipe feeding mechanism 2.
5 is a tube roll-up detector.

The pipe feed mechanism 2 has a structure in which a pair of feed rolls 21 and 22 are supported by a roll driving section 23, and forcibly feeds the pipe 1 while sandwiching the pipe 1 between the feed rolls 21 and 22. “A” indicates the rotation direction at the time of feeding. The pipe pre-bending mechanism 3 has at least three bending rolls 31, 32, and 33. The bending rolls 31, 32, and 33 are arranged so that 31 and 32 are outside and 33 is inside, and the outside rolls 31 and 32 and the inside roll 33 are By passing the pipe 1 between them, the pipe 1 is subjected to bow-shaped pre-bending. The tube preliminarily bent in this manner is wound around the winding drum 41 of the winding drum 4. 42,43
Is the edge plate of the drum.

The conventional example of FIG. 3 is provided with a drum traverse system in which the winding drum 4 is reciprocally moved (moved in the direction of arrow c) along the axial direction of the winding drum 4 so that the tubes can be aligned and wound up. There is.

When the tube 1 is wound on the winding drum 41 and the winding point reaches one of the edge plates 42 or 43, the tube is rolled up and the winding of the next layer is started. This timing is detected by the winding detector 5, and the detected signal is sent to the sending speed control device 6. The feeding speed control device 6 determines the signal fed from the winding detector 5 and controls the feeding speed of the pipe feeding mechanism 2 to a predetermined speed according to the number of winding stages.

The above points will be described in more detail.
Is wound on the winding drum 41 of the winding drum 4 in a coiled manner in multiple stages (alignment winding), and when the pipe reaches one of the edge plates 42 or 43 of the winding drum, it winds up.
From that point, the radius of coil winding increases and the winding speed changes. This winding is detected by the winding detector 5,
The tube feeding speed is made to follow the winding speed after the coil radius is increased, and the tension of the tube between the tube feeding mechanism 2 and the winding drum 4 is kept constant.

As described above, the winding speed and the feeding speed of the pipe are synchronized with each other, and the pipe moving between the bending device 3 and the winding drum 4 does not generate excessive or small tension, and A predetermined pre-bending process is applied, and winding (alignment winding) is performed while preventing the tube itself from being crushed due to abrupt bending of the tube.

[0008]

According to the above-described conventional tube winding device, the winding of the tube is detected on the winding drum of the winding drum, and the speed control device is operated based on this detection signal. Since the speed control of the tube feeding mechanism 2 is performed, an unavoidable time difference occurs until the tube feeding speed and the winding speed become equal.

As a result of the above time difference, the tension applied to the tube continues to change from the time when the tube is wound until a certain time elapses, and at some point during the change in tension, the tension is close to the bending roll, particularly the winding drum. There is a situation in which the outer roll 32 and the pipe are not in contact with each other, and a predetermined pre-bending process is not performed, and as a result, the pipe is abruptly bent at the time when it is wound around the winding drum, and the pipe is crushed. Occurs. Further, when the tube is wound with an excessive tension applied to the tube, the tube sometimes falls into the lower winding layer when the tube can be wound.

In view of the above-mentioned problems of the prior art, the present invention has a multi-stage structure to prevent the tube from being crushed when winding a linear body, that is, a tube which is easily crushed by extreme bending and cannot be restored once crushed. An object of the present invention is to provide a winding device and a winding method capable of winding a layer.

[0011]

A tube winding device provided by the present invention comprises a tube feeding mechanism, a tube pre-bending mechanism, and a winding drum, and a tube winding apparatus having a feeding speed control device attached to the feeding mechanism. In the take-up device, a pipe orbit detector capable of detecting the pipe orbit is provided between the pipe pre-bending mechanism and the winding drum, and a signal from the pipe orbit detector is sent to the speed controller for input. Is.

Further, in the method of winding the pipe provided by the present invention, the pipe is forcibly fed from the upstream side by the pipe feeding mechanism, and the pipe is pre-bent by the preliminary bending mechanism at the downstream side thereof, and then the winding drum. In the winding method, the pipe orbit is detected by the pipe orbit detector after the pipe is pre-bent and before the pipe is wound, and the speed of the feeding mechanism is controlled according to the output from the pipe orbit detector. A method of correcting the orbit before winding the pipe.

[0013]

According to the pipe winding device and the winding method of the present invention, the orbit of the pipe itself is directly detected by the pipe orbit detector before the pipe is wound on the winding drum, and the detection result is obtained. Take it into the feeding speed control device and immediately determine whether it is the orbital state of the pipe, that is, whether it is the outward swelling and loosening direction or the inward linear stretching direction and the pulling direction, and if it is the former loosening direction, decelerate If the latter is in the pulling direction, the acceleration command is sent to the pipe feeding mechanism to control the feeding speed of the pipe. It can be automatically corrected quickly.

[0014]

FIG. 1 shows an embodiment of a tube winding device according to the present invention, which has the same structure as that of FIG. 3; the functional parts have the same reference numerals as those used in FIG. is there. That is,
1 is a tube, 2 is a tube feeding mechanism, 21 is a feeding roll,
23 is a roll driving unit, 3 is a pipe pre-bending mechanism, 31, 32
Is an outer bending roll, 33 is an inner bending roll, 4 is a winding drum, 41 is a winding drum, 42 is a cover plate, and 6 is a feeding speed control device. For a detailed description of the parts relating to them, refer to the above description (prior art section) with respect to FIG.

According to the present embodiment, a new tube trajectory detector 7 is added.
Is provided in the tube passage portion between the tube pre-bending mechanism 3 and the winding drum 4. The pipe track detector 7 is arranged in a specific direction, that is, on a line orthogonal to a tangent line d between the bending roll 33 that contacts the pipe from the inside in the pipe pre-bending mechanism 3 and the pipe winding start point of the winding drum 4. Pair of guide rolls 7 for sandwiching
1, 72 to detect the passage position of the pipe in the direction orthogonal to the tangent line d, that is, the trajectory. The detection result from the pipe trajectory detector 7 is input to the feed speed control device 6 so that the pipe feed speed by the pipe feed mechanism 2 can be automatically controlled.

FIG. 2 shows a work flow chart of a winding method using the above apparatus. The feed control device 6 pre-calculates an ideal trajectory having optimum tension with respect to the passage position of the tube 1 between the tube pre-bending mechanism 3 and the winding drum 4, that is, the trajectory, and sets this as reference data. Then, the reference data and the measured value of the tube trajectory detector 7 are compared and calculated. The measured values include a trajectory that is displaced inward and outward with respect to the actual ideal trajectory, that is, a trajectory that bulges outward and a trajectory that stretches linearly inward. The tube trajectory detector 7 detects which side is displaced, and feeds it back to the feed-in control device 6 as positional information about the distance to the tangent d. These are the orbit detectors.

At the time when the orbit information from the pipe orbit detector 7 is sent into the speed control device 6, the orbit information is compared with the reference data of the ideal orbit, and the orbit bulges outward and is in the loosening direction, or the orbit is stretched inward. Then, it is determined whether or not there is a linear pull direction. This will be the trajectory determination unit. In the former loosening direction, a deceleration command is issued, and in the latter pulling direction, an acceleration command is issued to the roll driving unit 23 of the pipe feeding mechanism.
The feeding speed of the pipe portion before entering the pipe pre-bending mechanism 3 is adjusted. This serves as a feed amount control unit.

By adjusting the feeding speed as described above, the trajectory of the pipe before being wound onto the winding drum 4 behind the pipe pre-bending mechanism 3 is corrected to an ideal trajectory. Although there is a time lag, this pipe correction operation can complete the correction in a shorter time than the conventional control operation from the winding time of the take-up drum, and also directly detects the trajectory before being wound and detects this. Because of the correction, it is possible to prevent a sharp bend of the pipe before winding.

In many cases, the tube trajectory is displaced inwardly into a linear tension. This is a process in which the tube 1 is wound around the winding drum 41 of the winding drum, and one side of the edge plate 42 or 4 is used.
3 (see FIG. 3B), a winding-up phenomenon occurs, and the winding radius increases from the time when the winding is performed in one layer, and the winding speed of the tube increases. As a result, a large amount of tension is applied to the tube 1 and a sharp bending point is likely to occur. Therefore, the position information from the pipe trajectory detector 7 is transmitted to the feed speed control device 6 as the information of the orbit displaced inward, the device 6 issues an acceleration command, and the pipe feed mechanism 2 controls the acceleration. .

[0020]

According to the tube winding device and the winding method of the present invention as described above, the trajectory of the tube is detected before the tube is wound, and this information is input to the feeding speed control device. Then, is the track bulging outward and in the loosening direction?
It is determined whether the track is displaced inward and in the pulling direction, and the speed of the pipe feeding mechanism is adjusted based on the result, so that the pipe pre-bending mechanism can be used before the pipe is wound onto the winding drum. The pre-bent tube trajectory can be corrected to an ideal trajectory, which prevents the tube from collapsing due to a sharp bend and also prevents excessive tension when winding on the take-up drum. To prevent the pipe from falling into the lower winding layer, and to significantly reduce the defects of the pipe and to improve the accuracy of the diameter of the pipe cross section to improve the quality. You can

[Brief description of drawings]

FIG. 1 is a plan explanatory view showing an arrangement winding state of tubes in an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a work flow of a method for controlling a pipe orbit in the embodiment of the present invention.

FIG. 3 is a plan view of a conventional example in which (a) is an aligned winding state, and (b) is a side view of the same situation.

[Explanation of symbols]

 1 Tube 2 Tube Feeding Mechanism 21 Feeding Roll 23 Roll Driving Section 3 Tube Pre-Bending Mechanism 31, 32, 33 Bending Roll 4 Winding Drum 41 Winding Body 42, 43 Edge Plate 6 Feeding Speed Control Device 7 Tube Orbit Detector 71, 72 Guide roll

Claims (2)

[Claims] 1. A pipe winding device having a pipe feeding mechanism, a pipe pre-bending mechanism, and a winding drum, wherein a feeding speed controller is attached to the feeding mechanism, and the pipe pre-bending mechanism and the winding drum are provided between the pipe pre-bending mechanism and the winding drum. A pipe winding device in which a pipe orbit detector capable of detecting the pipe orbit is provided and a signal from the pipe orbit detector is sent to be input to a speed control device. 2. A method of forcibly feeding a pipe from an upstream side by a pipe feeding mechanism, preliminarily bending the pipe at a downstream side thereof by a pre-bending mechanism, and then winding the pipe on a winding drum, after pre-bending the pipe. The pipe orbit before winding the pipe is detected by the pipe orbit detector, and the velocity of the feeding mechanism is controlled according to the output from the pipe orbit detector to correct the pipe before winding. Tube winding method.