JPS60196217A - Continuous rolling method of metallic pipe - Google Patents

Abstract

PURPOSE:To roll efficiently and surely various metallic pipes having joints by setting plural points in a rolling line, detecting the joints of the pipes and controlling the deceleration and resetting of feed speed. CONSTITUTION:The operator transfers manually a metallic pipe A by a feed chucking device 5. The pulse transmitted from a pulse transmitter 13 is inputted to an arithmetic device for storage when a joint detector 12 detects the joint. The operator pushes a deceleration start button 17 to decelerate the pipe A and to store the number of pulses up to the 1st point I into an arithmetic unit 14 upon arriving of the joint at the point I . The operator pushes a rolling completion button 18 and draws out the preceding material A1 by an outlet side chuck 9 upon arrival of the joint emerging from the rolling mill at the 2nd point II. The operator stores also the number of pulses up to the point II into the unit 14. The operator pushes a deceleration reset button 19 to grasp the succeeding material A2 by the chuck 9 and to reset the transfer to the high speed and stores the number of pulses up to the 3rd point II into the unit 14 when the joint arrives at the 3rd point III. The operator changes over the device to the automatic mode to continue the transfer of the pipe A.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for continuous rolling of metal tubes, particularly for continuous rolling of joint portions.

Conventionally, when rolling cedar for hoops and copper alloy pipes, if the leading material and the trailing material were rolled successively, cracks would occur at the pipe ends at the joint, so the feed was slowed down and then increased again when rolling was completed. This was prevented by performing a driving operation that sends out a preceding abductor. However, since this driving operation is performed visually, it requires skill and is inefficient. It is unthinkable to automate the operation to correct this problem, but since it is not possible to install a detector to detect joints in the rolling process, it is necessary to install it in the feeding section of the previous stage, and measure the metal tube with reference to the detector position. Each point in the operation of the device must be automatically operated based on the numerical values calculated. However, the elongation rate differs depending on the phase quality, dimensions, strands, etc. of the metal tube. For example, there is a difference of 27 inches between copper and copper alloy, and there is a difference of about 4 inches between strands even if they are of the same quality and size. In reality, the rolling completion operation is too early and the tail of the leading phase is carried out without being fully rolled, resulting in a defective product, or the rolling completion operation is too late and the trailing material hits the exit chuck and causes the chuck. It has not yet been put to practical use because there is a risk of problems such as damage to the product.

Therefore, the present invention was made in view of the various problems mentioned above, and includes a feed chuck device and a seam detection device at the front stage of the rolling process including the rolling rolls, and an exit chuck device at the rear stage, and the metal tube The first, second, and third points are measured and input in advance using a pulse signal amount proportional to the feed amount, and the joints of the metal pipes being sent are detected by a joint detection device. , emit a pulse signal, count it by comparing it with the input signal track, decelerate the rice paddy pipe feed υ speed of the feed chuck device at the first point, and then open the outlet chuck device at the second point; Furthermore, at the third point, the exit side 1 chuck device is closed to grip the metal tube, and by controlling the feed speed to vary, it is possible to efficiently and reliably handle various types of metal tubes with different paulownia materials, sizes, strands, etc. The purpose of this is to obtain a method that allows rolling.

The method of the invention will be described in detail below with reference to embodiments shown in the drawings.

(1) is a rolling mill operating device for the rolling process, and a hydraulic motor (4) controls a rolling roller (3) in a carriage (2). (5) is a feed chuck operating device, which is installed before the rolling process (11), and has two sets of feed chucks (71 (71) on the feed screw (61).
is installed, and the two silk feed chucks (7i (7)
The metal tubes (5) are alternately rotated and fed forward, and the feeding speed is controlled. (8) is an exit chuck actuating device, which is installed after the rolling process (1) and chucks the rolled metal tube (A) that has passed through the feed chuck (7) with the exit chuck (9). and rotate it. 0niF! , a pinch roll actuating device, which is provided after the outlet chuck actuating device* (8), and is actuated so that the rolled metal tube (A) is sent out by the pinch roll 0◇. α■ is a seam detector, which is installed between the rolling process (11) and the feed chuck actuating device (5).
, ) to detect the seam. α] is the Norms transmitter, and the feed chuck actuator ft (set to 51, feed -
It is configured to emit one pulse at t for x1 silk. 04 is a storage/arithmetic unit which receives and stores information from the seam detector α and pulse transmitter 0, or performs a calculation and sends an output signal to the control unit (1GK).

The control device 09 receives the above output signal and commands from the hand 1WJ, automatic switching Htxt a*, deceleration start button 07), which is the operation button for manual operation, the rolling completion button 0 barrel, and the deceleration return button 01, and performs each operation. Rolling mill operating device (1)
, feed chuck actuator R (5), outlet chuck actuator (8), and pinch roll actuator αQ.

To operate the device configured in this way, first, after switching the manual/automatic switching device #θG to manual, the metal previous material is transferred while being rotated by the feed chuck actuating device (5), and the preceding material (A , ), and when it reaches the seam detector o2, the seam detector 0'A
The seam is detected by the pulse estrus machine 03.
is activated and sends out a pulse, which is input to the memory device α rod and counted. Furthermore, it is visually confirmed that the joint has been transferred and has reached the first wheel (1) of the carriage (2) in the rolling process, and at the same time the deceleration start button αη is pressed.

As a result, the previous transfer of gold FA is slowed down, and the number of pulses at the joint detector u field (1st point) (I3) is memorized in the memory/calculation device ayu. ) and when it is visually confirmed that the second point (n) has been reached, press the rolling completion button α (to). As a result, the exit chuck actuating device (8) is activated, the exit chuck (9) is opened, and the preceding material (A1) is pulled out, and the second point (0) is pulled out from the seam detector 02.
) are stored in the storage/arithmetic unit α◆. Furthermore, when the third point @) at which the joint passes through the exit chuck (9) is visually confirmed, the deceleration return button 09 is depressed.

As a result, the exit chuck (9) pinches the trailing material (A,), and simultaneously operates the rolling actuating device f (1), the feed chuck actuating device 4fettW, (5i, and the pinch roll actuating device 2) to The transfer speed of (2) is returned to high speed, and at the same time, from the seam detector a2 to the third point)
(The number of pulses up to 1111 is stored in the memory/calculation device 0 fathom. After actually measuring each point and storing it in the memory/computing device as the pulse number 748, the manual/automatic switching device (LE) is Switch to automatic.Then, start the rolling mill again and transfer the metal previous material.As a result, the joint between the preceding material (A1) and the succeeding material (A) of the metal tube (4) is detected by the seam detector (
6), the storage/arithmetic unit U starts counting the pulse signal from the pulse transmitter 03, and compares it with the amount of the pulse signal that has already been counted. When the pulse signal reaches the pulse signal amount of the first point (1), the control device N 05 K blade signal is sent, and the control device α9 automatically outputs the rolling mill operating wave [(1
1. Operate the feed chuck actuator (5), the outlet chuck actuator (8), the vinyl roll actuator, and fHii to reduce the transfer speed of the metal tube (A) and reduce the F of the joint part.
[1 extended work is carried out. When the pulse signal count further advances and reaches the second point (In), the controller αUt output side chuck actuator f & (81 is activated, and the output side chuck (91 is opened to release the preceding material (A,
) from the exit chuck (9) and the trailing 1
(A,) %1 Insertion into the chuck (9) is performed smoothly. Proceeding further, the pulse signal amount scenery becomes the third stage.
When the point (l [pulse signal amount of Il - 11, the trailing material (A,)
At the same time, the metal tube (9) of the trailing material (A t) is sped up again and rolled.

As an example, the relationship between the pass signal at each point and the material after implementing this method is as follows. Because it is something that
Each point can be set with an accurate elongation rate that takes into account rolling roll differences and calculation errors that cannot be ignored in calculations, and there is no need for calculations by the operator or particularly complicated operations. , the setting operation is extremely simple and quick.
Can be done accurately. Furthermore, once the actual measurement settings have been set, rolling operations can be performed automatically without changing the set values, including margin, dimensions, and roll changes, which makes it easier to operate than the conventional method of visual operation. This method produces various excellent effects such as being able to reliably roll the joint portion without requiring any skill, and being able to roll quickly and efficiently.

[Brief explanation of the drawing]

The drawing shows a schematic side view of an apparatus in which the method of the invention is used. (11...Rolling mill operating device, (3)...Rolling roller, (5)...Feed chuck operation i1!, (8)
...Exit chuck actuating device, fllll...Vinch roll actuating device, 0u...Seam detector, ■...Pulse transmitter, a4...Memory calculation device, 碩)...Control device , (Ie...manual, automatic switching device, (1)...first point, (■)...second point, (Ilr)・
...Third point.

Claims (1)

[Claims] A feed chuck device fm and a vertical grain detection device are installed at the front stage of the rolling process including rolling rolls, and an output chuck making force is installed at the rear stage.
Equipped with a pulsing needle proportional to the metal tube feed needle, it is the first in the No. 1
Is the point, second point, and third point real in advance? 1
I11 is input, and the joint of the metal pipe that is sent is detected with joint detection @ edict, and a pulse signal is emitted.
The count is compared with the input signal needle, the metal tube feeding speed of the feed chuck device is reduced at the first point, then the 4111 chuck device is opened at the second point, and the 111 Richa Sok is installed at the third point. A 7-sequence rolling method for metal tubes in which a closed metal tube is gripped and the feed speed lW is restored to control the joints of the metal tube.