JPH0344330Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to the structure of a roll stand equipped with a roll batch exchange mechanism in a rolling or forming machine or the like.

(Prior art) For example, in a head-opening stand for a roll forming machine, it is assembled with a roll having a mold surface corresponding to the object to be molded, so when the object to be molded is changed, the roll that was previously installed is It must be removed and set on a roll with a mold surface suitable for the new object to be molded.

Further, when maintaining the roll assembly, that is, modifying the roll or inspecting the bearings, it is essential to disassemble the roll assembly itself.

Conventionally, in such roll replacement work, as shown in Fig. 5, the cap 23, upper roll assembly _8-1 , and lower roll assembly _5-1 were individually pulled out in this order by an overhead crane, and when the new roll was installed. was installed using the reverse procedure.

Furthermore, Japanese Patent Publication No. 58-926 discloses a conventional recombination device. This conventional device is shown in Figure 6.
As shown in FIG. 7, a roll device consisting of a guide rod 4, a connecting rod 6, and a cap 3 can be freely inserted into an engaging longitudinal groove formed in a rising rod 18 of a roll stand S through the guide rod 4. The stand is revealed.

(Problem to be solved by the invention) In conventional equipment where roll assemblies are individually pulled out and assembled using an overhead crane, the bearing box rotatably attached to the roll shaft tilts during assembly, making it difficult to place it into a stand. It takes a lot of time. In addition, there was a problem in that roll rearranging was a complicated task that required the use of an overhead crane several times, and that skill was required for roll rearranging.

In addition, the conventional device shown in FIGS. 6 and 7 is compatible with each size because it inserts a device consisting of a guide rod 4, a connecting rod 6, and a cap 3 into the engagement vertical groove of the rising rod 18 of the roll stand S. There is a problem in that it is necessary to prepare a recombination device for the cassette-shaped rolls.

Furthermore, the technique shown in FIGS. 6 and 7 requires considerable time and effort to remove only the roll assembly from the cassette offline after the roll unit cassette is removed from the online cassette.

Incidentally, if one attempts to take out only the upper and lower roll assemblies online from the roll unit cassette of Reference 1, the following complicated procedure is required.

Remove the roll unit cassette from the stand.

Remove the guide bolt.

Remove the upper plate and upper roll assembly (with chock installed).

Remove the guide rods fastened with bolts to both sides of the lower roll chock from the lower roll chock.

Remove the connecting rod that connects the two lower roll jocks with the bottle. This allows the lower roll assembly to be made independent for the first time.

In addition, in the manufacturing process of electric resistance welded pipes, etc., when trying to cope with a forming method in which the height of the lower roll is gradually reduced as the height of the lower roll is gradually decreased as the height of the lower roll stands increases, this conventional technology is often used as a means to improve the formability of the pipe. , Since the lower roll bearing is fastened to the guide bolt and connecting rod, the height of the lower roll cannot be adjusted.

(Means for solving the problem) In order to solve the problem, the present invention provides a common vertical through hole in the upper roll bearing box and the lower roll bearing box housed in the roll stand, and a hole is provided at the lower end. To provide a roll stand equipped with a roll batch exchange mechanism, characterized in that a hanging rod provided with a stop member is inserted into a through hole of the hanging rod, and the upper end of the hanging rod is detachably attached to a roll stand cap.

(Function) In the roll stand of the present invention, a hanging rod is inserted into a common vertical through hole formed in the upper and lower roll bearing boxes, and the lower bearing box is supported by a retaining member provided at the lower end of the hanging rod. Rather than lifting the entire roll unit cassette as is the case with conventional technology, only the cap and upper and lower roll assemblies can be lifted together using a crane, which is equipped with a hanging rod as the minimum necessary lifting device for roll replacement.

Therefore, efforts are being made to simplify the work and simplify the component configuration.

Then, off-line, only the roll assembly can be quickly taken out.

Furthermore, a through hole is provided in the lower bearing box through which the hanging rod is inserted, and the lower bearing box can be raised and lowered by the upper part of the retaining member provided at the lower end of the hanging rod, so the height of the lower roll can be adjusted. .

This makes it possible to adapt to a forming method in which the height of the lower roll is gradually reduced as the height of the lower roll stands approaches, which is often used as a means to improve formability in the manufacturing process of electric resistance welded pipes and the like.

(Embodiments) The present invention will be described in detail below based on embodiments shown in the drawings. 1 to 4 show an embodiment of the present invention, in which reference numeral 21 denotes a stand of a craniotomy molding machine, which is fixed to a soul plate 22. FIG. 23 is a cap of the stand 21, to which a lowering device 24 is attached. The lowering device 24 is of a screw lowering type, and the screw is fixed to the upper roll bearing box 28A. Reference numeral 26 denotes a hanging rod, the upper end of which is pivoted to the cap 23 with a bolt 31. The hanging rod 26 is slidably fitted into the upper roll bearing box 28A and the lower roll bearing box 25A. The upper roll bearing box 28A can freely move according to the movement of the lowering device 24, and the lower roll bearing box 25 can move up and down according to the movement of the lifting device 29. A stopper 30 is provided at the lower end of the hanging rod 26 to prevent the hanging rod from coming off from the bearing box.

The upper roll bearing box 28A and the lower roll bearing box 25A of the present invention have a common vertical through hole, and a hanging rod 26 is inserted into both holes. Also, as shown in FIG. 3, the upper and lower bearing boxes 28A and 25A are formed with fitting grooves 33 on both sides.
The fitting groove portions 33 of A and 25A can be fitted into the leg portions 21 of the roll stand.

The procedure of role reshuffling will be explained according to FIG. The stand 21 and the cap 23 can be easily removed by pulling out the connector 27 that connects them. Next, a hanging wire is attached to the lifting device 34 of the cap 23 and the cap is lifted up using an overhead crane. The lower roll bearing box 25 has a stopper 30 at the lower end of the hanging rod 26.
The upper roll assembly 28 is supported by the lower roll assembly 25.

By lifting the cap 23 with the above configuration, the upper roll assembly 28 and the lower roll assembly 2 are assembled.
5 are lifted up and removed from the stand 21 at the same time. When installing a new roll, the above procedure is reversed.

(Effect of the invention) The present invention inserts a hanging rod into a common vertical through hole formed in the upper and lower bearing boxes, and supports the lower bearing box with a retaining member placed at the lower end of the hanging rod, unlike the conventional technology. Rather than lifting the entire roll unit cassette, only the cap and the upper and lower roll assemblies, each provided with a hanging rod as the minimum necessary lifting tool for roll replacement, can be lifted together with a crane.

Therefore, efforts are being made to simplify the work and simplify the component configuration. This brings about the following various effects.

The upper and lower roll assemblies can be exchanged offline in a short time.

There is no need for parts for converting the roll unit into a cassette, and the number of parts for each size of forming roll can be reduced.

Since the hanging rod and the cap can be attached and detached in a short time using a roller, etc., it is only necessary to prepare one unit for all roll size assemblies, and only one unit is required for the expensive rolling down device installed on the cap. Therefore, it requires less.

Furthermore, since the hanging rod is structured to penetrate both bearing boxes, the following effects are brought about.

The lower roll assembly can be raised and lowered.

In order to maintain the bearings and rolls, it is essential to disassemble the roll assembly as a single unit.In this case, the roll assembly unit can be immediately removed by simply removing the retaining member provided at the lower end of the hanging rod. I can do it.

[Brief explanation of the drawing]

FIG. 1 is a front view of the device according to the present invention, FIG. 2 is a side view of the device, and FIG. 3 is a three-dimensional perspective view of the device.
Figures 4 a and b are roll recombination process diagrams of the present invention, and Figure 5
Figures a, b, c, and d show roll rearrangement process diagrams using a conventional device, and FIGS. 6 and 7 are explanatory diagrams showing the conventional device. 21...stand, 22...sole plate,
23...Cap, 24...Down screw, 2
5... Lower roll assembly (25A bearing box, 25B roll, 25C roll shaft), 26... Hanging rod, 27
...Cotter, 28...Top roll assembly (28A
Bearing box, 28B roll, 28C roll shaft), 29
... Pressure screw, 30 ... Stopper, 31
...Cotter, 32... Hanging tool, 33... Fitting groove.

Claims (1)

[Scope of utility model registration request] A common vertical through hole is provided in the upper roll bearing box and the lower roll bearing box housed in the roll stand, a hanging rod with a retaining member at the lower end is inserted into the through hole, and the upper end of the hanging rod is attached to the roll stand cap. A roll stand equipped with a roll exchange mechanism that can be freely attached to and detached from the roll stand.