JPS6219371Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tube forming apparatus, and more particularly to an apparatus for forming a tube by sequentially bending a continuous plate by passing the continuous plate through a number of forming roll units.

Conventionally, when forming a pipe from a continuous plate, as shown in Fig. 1, a width is set on the exit side of the first stage forming roll unit c, which is made up of a drum-shaped upper roll a and a drum-shaped lower roll b. Edge forming roll unit d
and a large number of outer forming rolls e called cage rolls and inner forming rolls (not shown) are arranged behind the exit side of the width edge forming roll unit d, and the continuous plate 1 is It is sequentially bent by passing it through each forming roll. Figure 2 shows the cross-sectional shape of the continuous plate in the above tube forming process, where A shows the cross-sectional shape of the continuous plate 1 passing through the first-stage forming roll unit c, and B shows the width edge forming roll. The cross-sectional shape of the continuous plate 1 passing through the unit d, C to F, shows the state in which the cross-sectional shape of the continuous plate 1 is gradually changed into a circular shape by the outer forming roll e. In the above case, the outer forming rolls e are divided into approximately three blocks, and one group of outer forming rolls e in each block is movable in the width direction of the continuous plate 1, as shown in FIG. A roll angle adjustment mechanism g and a support mechanism h are placed on a table f.
and each outer forming roll e
The angle of the rolls is gradually changed so that tubes can be formed. Note that i in the figure indicates the inner forming roll.

In summary, the conventional tube forming apparatus having the above configuration has the following problems.

(i) The behavior of a continuous plate during tube forming is not uniform depending on the thickness, grade (rigidity), and size of the continuous plate. Therefore, the appropriate roll angle of the outer forming roll e depends on the type of continuous plate. The outer forming roll e
Normally, more than 100 rolls are used, and it would be very time-consuming and impractical to readjust the individual roll angles for each different type of continuous board. In this case, the appropriateness of the outer forming roll e must be confirmed by experiment, which is very inefficient.

(ii) Therefore, the roll angle of the outer forming roll e is
It is set to a standard constant value, and it is necessary to handle various continuous plates under such conditions.For this reason, among the large number of outer forming rolls e, as shown in FIG. The roll angle is incorrect,
In some cases, the end of the roll digs into the continuous plate 1, and as shown in FIG.

The present invention was made to solve the above problems, and each of the many outer forming rolls that support the outer width edge of the continuous plate is equipped with a roll angle adjustment mechanism consisting of a screw and a nut, and is placed on a table. and tiltably support the table on a sliding base plate via a wedge mechanism or a spherical seat,
A device for driving the tilting of the table is provided, further supporting the slide base plate so as to be movable in the width direction of the continuous plate along the stand, and a device including a screw and a nut for driving the movement of the slide base plate. and a detection member configured to be extrudable in the same direction as the pressing direction of the roll and capable of detecting the extrusion position by coming into contact with the outside of the continuous plate near the roll end of the roll,
Further, when the detection value of the detection member changes from the reference value with the detection value of the detection member in a normal state where the center portion of the roll is in contact with the outer surface of the continuous plate as a reference value, the table tilts. The gist of the invention is a tube forming apparatus characterized in that it is equipped with an automatic roll angle control device that is equipped with a device that controls a device that drives a roll angle automatic control device.

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 6, reference numeral 1 indicates a continuous plate, and reference numeral 2 indicates an outer forming roll. The roll box 3 of the outer forming roll 2 is mounted on a table 8 via a support mechanism 6 including a bracket 4 and a pin 5, and a roll angle adjustment mechanism 7.
A screw 11 passes through the spherical seat 9a, the support member 10, and the spherical seat 9b, and one end of the screw 11 is pivotally connected to the roll box 3.
The spherical seats 9a and 9b are supported by the support member 1 by a and 12b.
The screw 11 can be fixed to the support member 10 by pressing it to 0. Table 8 is a continuous board 1
On the table 8, there are a large number of outer forming rolls 2 (for example, the entire outer forming roll 2 can be tilted toward the continuous plate 1 around the pin 5 by the roll angle adjustment mechanism 7 having such a configuration). When dividing into three blocks, the number corresponding to 1/3 of the total is arranged.

Both outer ends of the table 8 are connected via a support mechanism 16 and a wedge mechanism 17 consisting of a shaft 14 fitted with a spherical seat 13 and fixed to the table 8, and a support member 15 fitted on the spherical seat 13 of the shaft 14. It is supported on a slide base plate 18. in this case,
The directions of the shafts 14 of the support mechanisms 16 at both ends are perpendicular to each other. Both inner ends of the table 8 are also supported on the slide base plate 18 via support mechanisms 19 having the same structure as the support mechanisms 16 at the outer ends. In this case, the directions of the shafts 14 of the inner and outer support mechanisms 16 and 19 at the same end are also perpendicular to each other. Wedge mechanism 1
7 is for tilting the table 8, a screw 21 from the gear box 20 is screwed and connected to the lower wedge 22, and the screw 21 is rotated by the drive of a motor (not shown) to tilt the lower wedge 22. The table 8 can be tilted by sliding the table 8. The wedge mechanisms 17 interposed between the support mechanisms 16 provided at both outer ends and the slide base plate 18 are each operated by separate motors.
Therefore, the table 8 is configured to be tiltable in any direction. The slide base plate 18 is the stand 23
It is possible to move in the board width direction while being guided by a guide groove 24 provided in the board. Also, a nut 25 fixed to the lower part of the slide base plate 18, a screw 26 screwed into the nut 25, and a screw 26 screwed into the nut 25.
6, and a gear box 57.
A sliding base plate moving device is provided. Note that a hydraulic cylinder may be used as the operating source of the wedge mechanism 17.

In the tube forming apparatus configured as described above, the roll angle of each outer forming roll 2 is set to a standard value at each installation position by the roll angle adjustment mechanism 7, and these outer forming rolls 2 The necessary bending is applied to the continuous plate 1 through the cooperation of the inner forming roll (not shown) and the inner forming roll (not shown). However, if the thickness, grade, or size of the continuous plate 1 differs, the table 8
is tilted to adjust the roll angle of the first group of outer forming rolls 2 as appropriate, and the table 8 is moved in the width direction of the continuous plate 1 to adjust the position of the first group of outer forming rolls 2. The above operations are performed by appropriately operating one or both of the two wedge mechanisms 17 and by appropriately operating the motor 27 of the slide base plate moving device. Therefore, the roll angle of the outer forming roll 2 can be corrected without readjusting the individual roll angle adjustment mechanisms 7, and the efficiency of the roll angle correction work can be improved. The tube forming device with the above configuration is a width edge forming roll (see Figure 1).
Three units are installed on each side of the pass line at the rear of the exit side.

Next, the automatic roll angle control device for the outer forming roll will be explained with reference to FIGS. 7 to 11.

Figures 7 and 8 show an outline of a device for detecting the contact state between the outer forming roll and the continuous plate.
In addition to the sensing roller 28, a rod 29 with the sensing roller 28 pivoted at the tip, a device body 30 that slidably supports the rod 29, a spring 56 that pushes out the rod 29, and the amount of movement of the rod 29 is used to detect the rod 29. A sensor 31 is shown that detects the position of the roller 28. As shown in FIGS. 9 and 10, the apparatus for detecting the contact state between the outer forming roll and the continuous plate having such a configuration is such that the sensing roller 28 is located outside the continuous plate 1 near the upper end of the outer forming roll 2. The main body of the device is fixed to a part of the table so that it comes into contact with the table. FIG. 11 shows the control circuit of the automatic roll angle control device, in which 31 is a sensor;
2 is a controller, 33 is an indicator, 34 is a controller for a position setting drive system, and 35 is a position setting drive source (in the embodiment described above, a motor for tilting the table 8).

In the roll angle control device configured as described above, when the center part of the outer forming roll 2 contacts the outside of the width edge 1e of the continuous plate 1 (normal state), the plate contact surface of the sensing roller 28 is A distance S extending from the plate contact surface of the outer forming roll 2 is measured in advance, and this distance S is set as a reference value in the controller 32. During the forming of the continuous plate 1, a signal informing the position of the sensing roller 28 is sent from the sensor 31 to the controller 32, and the controller 32 compares this signal with the reference value to determine the position of the outer forming roll 2 and the continuous plate 1. The roll contact state is detected and a signal representing this roll contact state is sent to the indicator 33. At this time, if the position detection signal from the sensor 31 and the reference value are not the same, a signal is sent from the controller 32 to the controller 34 of the position setting drive system, and the controller 34 is the position setting drive source 35 for tilting the table. The position setting 36 of the table 8 is performed by appropriately driving the motor for the table 8, and the roll angle of each outer forming roll 2 on the table 8 is corrected. In the case of the embodiment described above, two automatic roll angle control devices are used to separately control the table tilting motors or hydraulic cylinders.

12 to 14 show other embodiments of the present invention, in which FIG. 12 shows a spherical seat 37 whose radial center is a predetermined plate contact point O of the outer forming roll 2;
38 is interposed between the table 39 and the slide base plate 40, and the table 39 can be tilted by the required means (in the case shown, by loosening or tightening the nut 42 of the screw 41) 13 and 14, the upper roll shaft of each outer forming roll 2 is supported by the screw 44 of the roll angle adjustment mechanism 43, and one shaft is attached to the lower roll shaft of the outer forming roll 2. 45, and brackets 46 are provided at both ends of the shaft 45.
The spherical seats 49 and 50 are interposed between the table 47 that supports the bracket 46 and the pedestal 55 provided on the slide base plate 48, and the table 47 is fixed by a necessary means (in the case shown, it is screwed). 51
the nut 52 of the bolt 53 and the nut 54 of the fastening bolt 53
This example shows an example in which the device can be tilted (by adjusting the

When automatically controlling the roll angle of the outer forming roll in the cases shown in FIGS. 12 to 14 above, it is of course possible to use a motor or a hydraulic cylinder as a means for tilting the tables 39, 47. be.

Since the tube forming apparatus of the present invention has the above-described configuration, () the roll angle of the outer forming rolls (cage rolls) does not need to be adjusted separately for each roll, saving labor in such work; It is possible to speed up the process. .

() () makes it actually possible to adjust the roll angle during tube forming.

() During tube forming, the roll angle of the outer forming roll can always be maintained at an optimum state, and therefore the inconvenience of the roll end of the outer forming roll hitting the continuous plate and causing defects can be eliminated.

It can produce excellent effects such as

[Brief explanation of the drawing]

Figure 1 is an overall view of the tube forming equipment, Figure 2 is an explanatory diagram of the cross-sectional shape of a continuous plate in the tube forming process, Figure 3 is an explanatory diagram of a conventional tube forming apparatus, and Figure 4 is an illustration of a conventional tube forming apparatus. 5 is a perspective view of a molded product made by the same apparatus, and FIGS. 6 to 14 are
The figures are explanatory diagrams of an embodiment of the tube forming apparatus of the present invention. Figure 6 is a front view (however, only one side is shown), and Figures 7 and 8 are for detecting the contact state between the outer forming roll and the continuous plate. Figures 9 and 1 showing the outline of the equipment for
FIG. 0 is an explanatory diagram of the operating state of the device, FIG. 11 is a control circuit diagram of the automatic roll angle control device, and FIGS. 12 to 14 are explanatory diagrams of other embodiments of the present invention. 1... Continuous plate, 2... Outer forming roll, 6,
16, 19... Support mechanism, 7, 43... Roll angle adjustment mechanism, 8, 39, 47... Table, 9
a, 9b, 13, 37, 38, 49, 50... Spherical seat, 17... Wedge mechanism, 18, 40, 48... Slide base plate, 28... Sensing roller, 31... Sensor, 32, 34... ...Controller, 35...Position setting drive source.

Claims (1)

[Scope of utility model registration request] A large number of outer forming rolls supporting the outside of the width edge of the continuous plate are arranged on a table equipped with a roll angle adjustment mechanism consisting of screws and nuts, and the table is connected to the table through a wedge mechanism or a spherical seat. The table is tiltably supported on a slide base plate and is provided with a device for driving the tilting of the table, further supports the slide base plate so as to be movable in the width direction of the continuous plate along the stand, and includes a screw and a nut. a device for driving the movement of the slide base plate, and configured to be able to push out in the same direction as the pressing direction of the roll, and detect the pushing position by coming into contact with the outside of the continuous plate near the roll end of the roll. furthermore, the detection value of the detection member is set to the reference value, with the detection value of the detection member in a normal state where the center portion of the roll is in contact with the outer surface of the continuous plate as a reference value; A tube forming apparatus characterized in that it is equipped with an automatic roll angle control device that is provided with a device that controls a device that drives the tilting of the table when the tilting movement of the table changes.