JPS6368206A - Roll setting method for pipe making equipment - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a roll setting method in an inner stand-forming pipe stand such as an electric resistance welded pipe forming equipment.

(Conventional technology) Conventionally, there are many product types in pipe manufacturing equipment such as electric resistance welded pipes, and it is necessary to change the set of rolls for each product type, and the frequency of resetting the rolls is as many as 10 times a month. Sometimes. Therefore, in order to increase the production amount, it is necessary to shorten the time for one roll change (including setting the roll reduction). Traditionally, roll recombination and reduction setting in ERW pipe manufacturing equipment relied on the operator's experience and intuition.
Adjustment time took a lot of time, and as a result, the yield was very poor. However, by changing the rolls using the inner stand method, the roll set dimensions are calculated in advance outside the line and the rolls are set, which shortens the adjustment time and makes it easier to make pipes. Accuracy has also improved.

(Problems to be Solved by the Invention) In conventional equipment, the reduction of the upper roll system can only be set on the forming stand within the line. For example,
As disclosed in Publication No. 55846, it is necessary to insert an inner in advance between the upper bottom type roll bearing box and the side roll yoke to set the rolling reduction outside the line, and the pressure inside the line is reduced. It must be removed during the lower setting. Therefore, there was a problem with the acquisition and time-consuming work.

(Means for Solving the Problems) The present invention aims to solve the above-mentioned problems, and aims to shorten the roll rearrangement reduction setting time, reduce the number of personnel, and further improve pipe accuracy. The purpose is to That is, in the present invention, in the rearrangement of rolls in which upper and lower rolls and side rolls are arranged on an inner stand,
The upper roll bearing box 4 housing the upper roll is equipped with a roll balance mechanism 13 for pushing the upper roll upward and a contact reference part 5 on the lower surface thereof, and the upper roll bearing box 4 is pushed down by a lowering screw and a side roll yoke 7 is attached. The work of contacting the reference part 5 formed on the lower surface of the upper roll bearing box and reading the height position of the upper roll fitted in the upper roll bearing box 4 based on the amount of movement of the reduction screw is carried out in a roll setting stand located outside the line. Then, move and adjust the upper roll with a reduction screw in the forming stand placed inside the pipe-making line according to the position adjustment amount of the upper roll set outside the lineζ
The present invention provides a method for setting rolls in pipe manufacturing equipment, which is characterized by setting rolls.

(Examples and effects) The present invention will be explained in detail below using examples.

The drawings show an embodiment of the present invention, and FIG. 1 shows the state of roll setting using a roll setting reference gauge 12 in a roll setting stand 11 outside the production line. FIG. 2 shows the lowering screw 2 being lowered to the upper surface of the reference surface liner 9 provided on the upper surface of the side roll yoke 7.
This shows a state in which the contact reference portion 5 formed at the lower part of the upper roll bearing box 4 is brought into contact to set the height position reference origin of the upper roll assembly.

FIG. 3 shows a state in which the lowering screw 2 is raised and the upper roll assembly is lifted by the roll balance mechanism 13, and the lower surface of the contact reference portion 5 is separated from the reference surface liner 9 of the side roll yoke 7. At this time, the roll setting A reference gauge 12 is placed between the forming rolls.

FIG. 4(&) is a sectional view showing the roll balance mechanism, and FIG. 4(b) is a side view.

FIG. 5 is a diagram showing the steps of the roll setting method using the upper roll reference contact portion. In the first step, the inner stand 6 on which each forming roll has been replaced is transferred to the roll setting stand 11.
Installed in state gold shown. At this time, each forming roll is in a position where the reference gauge for roll setting is inserted between the rolls.In the second step, the roll height reference position of the upper roll 3 is set. It is lowered to bring the contact reference portion 5 on the lower surface of the bearing box into contact with the reference surface liner 9. This is the origin of the height of the upper roll, and it is read at the lifting and lowering position of the reduction screw 2. In the third step, in preparation for inserting the roll setting reference gauge 12, the upper roll 3 is raised and the roll setting reference gauge 12 is inserted. In the fourth step, each forming roll is brought into contact with the roll setting reference gauge 12 to set the roll position. At this time,
The vertical position of the lowering screw 2 that lowers the upper roll 3 represents the amount of movement from the origin obtained in the second step, and this value is read in its entirety. This value is temporarily set to "H". After this, when the lowering screw 2 is raised, the upper roll is raised by the roll balance mechanism 13, so the reference gauge 12 for setting the roll is raised.
pull out. This completes the roll setting, but only the upper roll is at a certain height lifted from the roll setting position by the roll balance device 13. To change the rolls on a pipe-making line, replace the inner stand on which the roll-setting work has been completed with a roll-setting stand outside the line, and the inner stand that has the forming rolls of the size for which the pipe-making work has been completed inside the pipe-making line. It is carried out by

FIG. 6 shows the procedure for resetting the tube-making position of the upper roll in the tube-making line. The first step shows a state in which the inner stand 6 is installed on the forming stand after the roll setting of the forming rolls other than the upper roll has been completed using the roll setting stand 11.

The second step shows the working state of setting the roll height reference position of the upper roll 30, in which the upper roll is lowered by the upper roll lowering device e1 to bring the contact reference portion 5 on the lower surface of the bearing box into contact with the reference surface liner 9. The upper roll position at this time is the height reference origin of the upper roll, which is read at the elevation position of the reduction screw 2. In the third step, the upper roll is removed at a position where the lowering screw 2, which is lowering the upper roll by 3t, is raised by 1rHJ of movement from the origin obtained by the roll setting work on the roll setting stand 11 outside the line. make it stop. With the above, the roll setting of the upper roll 3 is completed.

By performing the above-mentioned work steps, the position of the forming roll set outside the line using the reference gauge for roll setting can be reproduced with high precision within the pipe making line in a short time.

(Effects of the Invention) By adopting the roll setting method of the present invention, the working time for roll setting after roll rearrangement in a pipe-making line is significantly reduced, and highly accurate ball setting is performed outside the line. can be easily and accurately reproduced in a short time.

[Brief explanation of drawings]

Figure 1 shows the state in which the roll setting reference gauge is inserted into the stand for roll setting, and Figure 2 shows the state in which the reference surface is fully in contact in order to fully set the height position reference origin of the upper roll assembly. . Figure 3 shows the state before the roll setting reference gauge is inserted and each forming roll is brought into contact with the gauge, and Figures 4 (a) and (b) show the state in which the upper roll is held by the roll balance mechanism. FIG. 3 is a cross-sectional and side view of the upper roll bearing box. Figure 5 is a diagram showing the process of setting the reduction of each forming roll using a roll setting stand outside the line. Figure 6 is a diagram showing the process of setting each forming seal using a forming stand inside the line. . 1: Upper roll downward facing, 2: Lowering screw, 3: Upper roll, 4: Upper roll bearing box, 5: Contact reference part,
6: Inner stand, 7: Side roll yoke, 8: Side roll, 9: Reference surface liner, 10:
Lower roll, 11: Stand for roll setting. 12: Reference gauge for roll setting, 13: Roll balance mechanism. Fig. 4 2, Reduction screw 4, upper roll bearing box 5: contact reference part 7, sight roll yoke 9, reference surface liner 13, roll balance mechanism Fig. 5 2 Reduction screw 3: upper roll 5, contact prefecture tFX section 9 :No S semi-surface liner Figure 6 5: Contact X-shaped part 9: Reference surface liner

Claims (1)

[Claims] When rearranging the rolls in which the upper, lower and side rolls are arranged on the inner stand, there is a roll balance mechanism (13) that pushes the upper roll upward in the upper roll bearing box (4) that houses the upper roll, and a contact reference section on the lower surface side of the roll balance mechanism (13). (5), the upper roll bearing box (4) is pushed down by the lowering screw, and the side roll yoke (7) and the reference part (5) formed on the lower surface of the upper roll bearing box are brought into contact, and the upper roll is moved by the amount of movement of the lowering screw. The height position of the upper roll fitted in the bearing box (4) is read in a roll setting stand placed outside the line, and then set outside the line in a forming stand placed inside the pipe making line. A method for setting rolls in pipe-making equipment, characterized in that the rolls are set by moving and adjusting an upper roll using a reduction screw in accordance with the amount of position adjustment of the rolls.