JPH0366043B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a roll setting method in an inner stand type pipe making stand such as electric resistance welding pipe building equipment.

(Conventional technology) Conventionally, in pipe manufacturing equipment such as electric resistance welded pipes, there are many product types, and rolls have to be changed for each product type, and the rolls have to be changed several dozen 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). In the past, the roll reduction settings for roll recombination in ERW pipe construction equipment relied on the operator's experience and intuition, which took a considerable amount of adjustment time and resulted in very poor yields. By recombining, the roll set dimensions are calculated in advance and the rolls are set outside the line, reducing adjustment time and improving pipe accuracy.

(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 Japanese Patent Publication No. 58-55846, in order to set the reduction in advance outside the line,
A fine adjustment liner must be inserted between the upper forming roll bearing box and the side roll yoke, and this fine adjustment liner must be removed during the setting of the line internal pressure. This resulted in a problem as the work required manpower and time. In addition, this fine adjustment liner has poor accuracy because it measures the gap between the roll bearing box and the side roll yoke and manufactures the liner based on the measurement results. Furthermore, it was necessary to prepare a large number of liners for each pipe size.

(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, a cassette type inner stand incorporating upper and lower rolls and side rolls excluding the upper roll lowering device is set in advance with an outer stand for roll setting outside the line, and the inner stand is assembled into an outer stand inside the line. ,
Again, in the roll setting direction in the pipe making equipment where the upper roll reduction is set, the upper roll bearing box 4 is
Roll balance mechanism 13 that pushes up the upper roll
A contact reference surface 5 is provided that contacts the reference surface liner 9 provided on the upper part of the side roll yoke 7, and an upper roll lowering device of the outer stand outside the line is used to contact the reference surface liner 9 provided on the upper part of the side roll yoke 7. The contact reference surface 5 provided on the roll bearing box is brought into contact to set the reference origin for the height of the upper roll, and then a roll setting gauge is inserted to measure the gauge height of the upper roll. When setting the roll on the stand, measure the reference origin of the upper roll height again in the same way as the outer stand outside the line, and move the upper roll by the amount of the gauge height measured on the outer stand and the height of the reference origin. This is a method for setting rolls in pipe manufacturing equipment.

(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 an outer stand 11 for roll setting outside the production line. FIG. 2 shows the height of the upper roll assembly by lowering the screw 2 and bringing the contact reference surface 5 formed at the lower part of the upper roll bearing box 4 into contact with the upper surface of the reference surface liner 9 provided on the upper surface of the side roll yoke 7. Indicates that the position reference origin is set.

FIG. 3 shows that the lower screw 2 is raised and the upper roll assembly is lifted up by the roll balance mechanism 13, so that the lower surface of the contact reference surface 5 is aligned with the side roll yoke 7.
indicates a state away from the reference surface liner 9,
At this time, a roll setting reference gauge 12 is inserted between the forming rolls.

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

FIG. 5 is a diagram showing the steps of the roll setting method on the outer stand for roll setting outside the line. In the first step (a), a state is shown in which the inner stand 6, in which each forming roll has been replaced, is installed on the outer stand 11 for roll setting (not shown in the drawing). At this time, each forming roll is in a position where a reference gauge for roll setting is inserted between the rolls. In the second step (b), the roll height reference origin position of the upper roll 3 is set, and the upper roll is lowered by the reduction screw 2 to bring the contact reference surface 5 on the lower surface of the bearing box into contact with the reference surface liner 9. . This is the height origin of the upper roll, which is read at the raising and lowering position of the screw-down screw 2. In the third step (c), the upper roll 3 is raised to insert the roll setting reference gauge 12, and then the roll setting reference gauge 12 is inserted. In the fourth step (d), 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 which is lowering the upper roll 3 represents the amount of movement from the origin obtained in the second step (b), and this value is read. This value is temporarily set to "H". After this, when the reduction screw 2 is raised, the upper roll is raised by the roll balance mechanism 13, so the roll setting reference gauge 12 is removed. This completes the roll setting, but only the upper roll is at a height raised by a certain amount 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 using the roll-setting stand outside the line, and the inner stand that contains the forming roll of the size for which the pipe-making work has been completed inside the pipe-making line. It is done by

FIG. 6 shows the procedure for resetting the tube-making position of the upper roll in the tube-making line. The first step (a) shows a state in which the inner stand 6, in which the roll setting of the forming rolls other than the upper roll has been completed, is installed on the roll setting stand 11 (not shown in the drawing). The second step (b) shows the working state of setting the roll height reference position of the upper roll 3, in which the upper roll is lowered by the upper roll lowering device 1 and the contact reference surface 5 on the lower surface of the bearing box is moved to the reference surface liner 9. contact with. The upper roll position at this time becomes the height reference origin of the upper roll, which is read at the vertical position of the lowering screw 2. In the third step (c), the lowering screw 2 that is lowering the upper roll 3 is raised by the amount of movement "H" from the origin obtained by the roll setting work on the roll setting stand 11 outside the line. Stop the upper roll at the position. That's all for top roll 3
role settings are 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.

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

[Brief explanation of drawings]

Fig. 1 is a diagram showing a state in which a roll setting reference gauge is inserted in a roll setting stand outside the line;
Figure 2 shows the state in which the reference surfaces are in contact in order to set the height position reference origin of the upper roll assembly, and Figure 3 shows the state in which the reference gauge for roll setting is inserted outside the line and each forming roll is Figures 4a and 4b are cross-sectional and side views of the upper roll bearing box, showing the upper roll held by the roll balance mechanism, and Figure 5 is the roll setting outside the line. FIG. 6 is a diagram illustrating the process of setting the rolling reduction of each forming roll using the stand, and FIG. 6 is a diagram showing the process of setting the reduction of each forming roll using the forming stand in the production line. 1: Upper roll reduction device, 2: Reduction screw,
3: Upper roll, 4: Upper roll bearing box, 5: Contact reference surface, 6: Inner stand, 7: Side roll yoke, 8: Side roll, 9: Reference surface liner, 10: Lower roll, 11: For roll setting Stand, 12: Reference gauge for roll setting, 13: Roll balance mechanism.

Claims (1)

[Claims] 1. A cassette type inner stand incorporating upper and lower rolls and side rolls excluding the upper roll lowering device is set in advance with an outer stand for roll setting outside the line, and the inner stand is assembled into an outer stand inside the line.
Again, in the roll setting method in pipe manufacturing equipment that sets the upper roll reduction, the upper roll bearing box 4 is
Roll balance mechanism 13 that pushes up the upper roll
A contact reference surface 5 is provided that contacts the reference surface liner 9 provided on the upper part of the side roll yoke 7, and an upper roll lowering device of the outer stand outside the line is used to contact the reference surface liner 9 provided on the upper part of the side roll yoke 7. The reference origin of the upper roll height is measured by contacting the contact reference surface 5 provided on the roll bearing box, and then the gauge height of the upper roll is measured by inserting a roll setting gauge. When setting the roll on the stand, measure the reference origin of the upper roll height again in the same way as the outer stand outside the line, and increase the upper roll height by the difference between the gauge height measured on the outer stand and the height of the reference origin. A method for setting rolls in pipe manufacturing equipment, characterized by moving the rolls.