JPH0112900Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a running cutting device that automatically cuts a running pipe into predetermined dimensions while a cutting machine moves in synchronization with the running speed of the running pipe fed out from a pipe-making machine. be.

This type of running cutting device generally transports the running tube (workpiece) using rolls, so the running speed fluctuates widely, and the cutting machine cannot synchronize with the speed of the running tube, resulting in variations in cut length. arise. This is because in pipe manufacturing equipment, tensile force is applied by rotation of rolls that come into pressure contact with the pipe body, but slippage of the rolls causes variations in the tensile force, resulting in variations in the feed speed of the running pipe. Based on the occurrence of In addition, even if a running pipe running speed detector is installed, such tensile force may occur instantaneously and then disappear, so even if the sudden speed change can be detected, the drive motor will not respond immediately. This is due to unavoidable circumstances.

Therefore, the purpose of the present invention is to eliminate the variation in cutting length in such a running cutting device, and to regulate the running speed of the running pipe.

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, 1 indicates the end of the pipe-making machine, 2 is a roll that rotates in pressure contact so as to feed out the running pipe 3, 4 is a cutting machine mounting table, which has a speed detection unit 5 and a cutting machine 6, The cutting machine 6 is configured to reciprocate in parallel with the running pipe 3 by a drive motor 7 which electrically detects the running speed of the running pipe 3 and rotates in synchronization with the running speed of the running pipe 3. 8 is a crank rod connected to the output shaft of the drive motor 7; 9 is a running guide rod of the cutting machine 6; 1;
0 and 10 are stands that support the traveling guide rod 9; 11 is a roll that supports the traveling tube passing through the speed detecting section 5 and rotates as a result; and 12 is a roll that is pressed against the traveling tube 3 by a spring 13. The running pipe 3 moves in a straight line from the pipe making machine 1 toward the cutting machine 6.

A running pipe 3 is provided between the pipe making machine 1 and the cutting machine 6.
A guide reservoir section 14 and a speed regulating section 15 are interposed. That is, a support stand 16 is fixedly installed on the side of the cutting machine mounting stand 4, and a guide reservoir 14 is installed on the support stand 16 on the pipe-making machine 1 side, and a speed regulator 15 is installed on the speed detector 5 side. . As shown in FIGS. 2 and 3, the guide reservoir 14 includes a support 17 of a required length having a width approximately the same as the outer diameter of the running pipe 3, and a support 17 on both sides of the longitudinal side of the support 17. Guide plate 1 with adjustable spacing
8 and 18, 19 is a bolt that supports the guide plate 18, and 20 is a movable element that is screwed onto both ends of the bolt 19 and moves back and forth to engage with the guide plate 18.
It can be fixed at a desired position on the bolt 19 with. Note that one end of the guide plate 18 is fixed to the support body 17, and the other end is opened and expanded to facilitate the guiding movement of the running pipe 3, and to allow the running pipe 3 to bend, while restricting excessive bending. The spacing can be widened as shown in FIG. 2 to allow for deformation. In addition, as shown in FIG. 1, the speed regulator 15 includes a touch roller 22 which can be driven to rotate in pressure contact with the running pipe 3 fed out from the guide reservoir 14, and supports the running pipe 3 in opposition to the touch roller 22. Meanwhile, a rotating support roller 23,
and a flywheel 24 detachably attached to the rotating shaft of the touch roller 22, and 25 is a lever that presses the touch wheel 22 against the running pipe 3 by the force of a spring 26. 27 is a pressure adjustment screw for the spring 26. The reason why the flywheel 24 is detachably attached to the rotating shaft of the touch roller 22 is that the regulating effect can be adjusted according to conditions such as the size and shape of the running pipe 3 and the running speed. Furthermore, by finely adjusting the force of the spring 26 via the adjustment screw 27, the contact pressure of the touch roller 22 against the running pipe 3 can be adjusted, allowing the touch roller 2 to rotate smoothly. be. The touch roller 22 may be formed with an appropriate frictional contact surface to make close contact with the running pipe 3.

Therefore, in FIG. 1, even if the running speed of the running pipe 3 suddenly increases, the flywheel 24 suppresses the rapid rotation of the touch roller 22 and stops the running pipe 3 from running rapidly. Therefore, the running pipe 3 is bent within the guide reservoir 14. This deflection of the running pipe 3 is allowed by enlarging the gap by moving the guide plates 18, 18 laterally, and forms a so-called pool for the deflection of the running pipe 3.
On the other hand, when the running speed of the running pipe 3 suddenly slows down, the bending part between the governor section 15 and the pipe making machine 1, especially the guide reservoir section 14, may cause the flywheel rotating at a constant speed to This prevents the running pipe 3 on the cutting machine 6 side from being rapidly decelerated by being pulled by the touch roller 22 with force. Thus, flywheel 2
Even if the touch roller 22 attempts to speed up or decelerate rapidly, it is suppressed and the speed is controlled to a substantially constant rotation due to the speed regulating rotation function of the touch roller 4, so that the amount of feed to the cutting machine 6 is reduced. Since it can always be kept constant, the detection roll 11 constantly sends a constant pulse signal to the drive motor 7, the drive motor 7 is always driven in a constant state, and the cutting machine 6 cuts the running tube every precise predetermined length. This is done by cutting 3.

In addition, fluctuations in the amount of feed to each cutting machine were actually measured in the running cutting device provided with the guide reservoir section 14 and speed regulating section 15 according to the present invention, and in the conventional running cutting device not provided with these sections. The data are shown in graphs in FIGS. 4 and 5.

FIG. 4 shows the conventional device, and FIG. 5 shows the device of the present invention. In conventional equipment, the fluctuation period is 50~
According to the device of this invention, the fluctuation period was 70ms, the fluctuation width was 20%, and the transition rate was 0.6%/ms.
400ms, fluctuation width 10%, transition rate 0.08%/ms. The feed rate is 60m/min in both cases. In addition, the error for cutting lengths of 30 to 100 cm is ±1.2 compared to conventional methods.
It decreased from mm to ±0.5mm.

As described above, according to the present invention, there is provided a guide reservoir that can allow the deflection of the running pipe and prevent bending of the running pipe, and a speed governor that adjusts the running speed of the running pipe. Therefore, the running speed of the running pipe sent to the cutting machine does not suddenly increase or decrease, and the running pipe can be sent to the cutting machine at a constant speed. By creating a state in which the detection roller can detect a traveling speed detection signal that is easy to respond to, it is possible to substantially eliminate variation in cutting length.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the running cutting device according to the present invention, Fig. 2 is a plan view showing the guide reservoir, Fig. 3 is a side view of the guide reservoir, and Fig. 4 is a running speed variation in the conventional device. Waveform diagram showing the situation. FIG. 5 is a waveform diagram showing the traveling speed fluctuation situation in the device of the present invention. 1... Pipe making machine, 3... Running pipe, 5... Speed detection section, 6... Cutting machine, 14... Guide reservoir section, 15...
Speed regulating section, 16... Support stand, 17... Support body, 18
...Guidance board, 19...Bolt, 20...Movable element,
21...Natsuto, 22...Tatsuchirola, 23...
...Support roller, 24...Flywheel, 25...
...Lever, 26...Spring, 27...Adjustment screw.

Claims (1)

[Scope of utility model registration request] A pipe-making machine, a speed detection device that detects the running speed of the running pipe fed out from the pipe-making machine, and a drive motor that is driven and controlled by the signal detected by the speed detection device, and is movable in parallel with the running pipe. In the running cutting device, the running pipe is equipped with a cutting machine and automatically cuts the running pipe into predetermined dimensions while the cutting machine moves in synchronization with the running of the running pipe. A support for movably supporting the pipe is provided, a guide reservoir is provided on both sides of the support in the longitudinal direction with guide plates whose intervals can be adjusted freely, and between the guide reservoir and the cutting machine, A running cutting device characterized in that it is provided with a speed regulating section consisting of a touch roller that presses against the running pipe and a flywheel that can be detachably and coaxially connected to the touch roller.