JPH07265959A - Device for exchanging stand of tube manufacturing machine - Google Patents

Abstract

PURPOSE:To reduce the roll exchanging time by providing a spline on the end part on the drive side of a roll shaft to be fitted in a spline hole, and providing release-stop on the end surface on the work side of the roll shaft to allow the exchange of the roll shaft together with a work side stand. CONSTITUTION:A roll shaft 31 is withdrawn from a drive side stand by releasing the fixing of a work side stand and sliding it in the direction of the roll shaft. The integrated set of the roll shaft 31, a roll 32, the stands, etc., is lifted by a crane to be moved. Another set which is prepared out of the line is lifted by the crane to be moved. Another set prepared out of the line is lifted by the crane, and slid on a bed in the direction of the roll shaft, and a spline 31c of a driving part of the roll shaft 31 is fitted in a spline hole of a drive shaft 16. Then, a work side stand is fixed to the bed by bolts. For the removed stand, a roll 32 is withdrawn from the roll shaft, and a roll of different size is inserted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stand exchanging device for a pipe making machine.

[0002]

2. Description of the Related Art A conventional pipe forming machine is constructed as follows. That is, the strip is unrolled horizontally from the strip coil in a horizontal plane, and upper and lower roll shafts along the width direction are provided on the upper and lower sides of the strip, and the roll shafts are vertically moved. A pair of forming rolls are fixed, one end of these roll shafts is supported by a drive-side stand and the other end is supported by a work-side stand via a chock, and a drive device is connected to the side of the drive-side stand via a universal joint. .
Then, a plurality of sets of the above-mentioned sets are arranged in parallel in the horizontal direction of the strip feeding, and the strip is formed into a tubular shape.

When changing the pipe size (diameter), however, the universal joint is removed, and the integrated bed, stand, roll shaft, and roll are removed by hoisting with a crane, etc. It was replaced with another set prepared.

[0004]

Therefore, it is necessary to remove and install the rolls outside the line, and almost the same replacement time as that inside the line is required. In addition, the above-mentioned integrated unit is required for each stage, which requires a wide standby space and enormous cost.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and to provide an exchanging device capable of exchanging a roll shaft together with a working stand and shortening a roll exchanging time.

[0006]

In order to solve the above problems, the structure of the present invention is as follows. That is, the strip is unrolled horizontally from the strip coil in a horizontal plane, and upper and lower roll shafts along the width direction are provided on the upper and lower sides of the strip, and the roll shafts are vertically moved. A pair of forming rolls are fixed, one end of these roll shafts is supported by a drive side stand, the other end is supported by a work side stand via a chock, and a drive device is connected to the side of the drive side stand via a universal joint. In a stand exchanging device of a pipe forming machine in which a plurality of sets of the sets are arranged in parallel in the horizontal direction of the strip feeding, and the strip is formed in a tubular shape, the working side stand is slidable in a roll axial direction with respect to the bed, and The sleeve is rotatably accommodated inside the driving side chock via a bearing, and a receiving cylinder is projectingly provided on the driving device side of the driving side chock, and a bearing is provided inside the receiving cylinder. Su A drive shaft having a line hole is rotatably provided, a bearing is provided inside the working side chock, and a working side is detachably covered with a chock cover, and a forming roll is provided at a main part in the middle of the roll shaft. Is fixed, the receiving portions on both sides are slidably fitted to the sleeve and the bearing of the chock, and the drive side end of the roll shaft is provided with a spline and fitted to a spline hole of the drive shaft. The work-side end surface of the roll shaft is provided with a retainer.

[0007]

[Operation] The work side stand is unfixed and slid in the roll axis direction, and the roll axis is pulled out from the drive side stand. Then, the roll shaft, the roll, the stand, and the like, which are integrally formed, are lifted and moved by a crane. Another set prepared outside the line is hung by a crane and slid on the bed in the roll axis direction, and the spline of the drive part of the roll shaft is fitted into the spline hole of the drive shaft. Then fix the working stand to the bed. What was removed, remove the nut, pull the roll from the roll shaft,
Re-insert rolls of different dimensions and secure with nuts.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below based on an embodiment shown in the drawings. In FIGS. 1 and 2, the strip A is unrolled in the horizontal direction from the strip coil A0 in a horizontal plane, and upper and lower roll shafts 31 are provided on the upper and lower sides of the strip along the width direction. , These roll shafts 31
A pair of upper and lower forming rolls 32 is fixed to. One end of these roll shafts is supported by a drive side stand 1 and the other end is supported by a work side stand 2 via chocks 11 and 21, and a drive device 3 is connected to the side of the drive side stand 1 via a universal joint 4. . A plurality of the above-mentioned groups are arranged on the bed B in the horizontal direction of the strip feeding, and the strips are formed into a tubular shape.

Now, the working-side stand 2 is slidable with respect to the bed B in the roll axis direction and detachable with bolts. In FIG. 3, the driving side chock 1
A sleeve 13 is rotatably accommodated inside a bearing 1 through a bearing 12, and a drive shaft 16 having a spline hole is rotatably provided through a bearing 15 on the drive device 3 side of the drive side chock 11. A bearing 23 is provided inside the working side chock 21, and the working side is detachably covered with a chock cover 22.

The forming roll 32 is fixed to the main part 31a in the middle of the roll shaft 31, and the receiving parts 31b on both sides are slidably fitted to the sleeve 13 and the bearing 23 of the chock to drive the roll shaft. The side end portion is provided with a spline 31c and is fitted into the spline hole of the drive shaft 16,
When the size of the roll is to be changed more than the stopper 24 is provided on the work side end surface of the roll shaft, the fixing bolt of the work side stand 2 is removed, and the stand 2 is slid in the roll axis direction. Pull out 31 from the drive side stand 1. Then, the roll shaft 31, the roll 32, the stand 2, and the like, which are integrally formed, are lifted and moved by a crane. Another set prepared outside the line is hung by a crane and slid on the bed B in the roll axis direction, and the spline 31c of the drive unit of the roll shaft is driven by the drive shaft 16
Fit into the spline hole of. After that, the working stand 2 is fixed to the bed B with bolts. In the removed product, the nut 34 is removed, the roll 32 is extracted from the roll shaft, the rolls having different dimensions are reinserted, and the nut is fixed.

The present invention is not limited to the examples and embodiments described above, but includes various modifications without departing from the spirit and scope of the claims.

[0012]

According to the structure of the present invention, since only the working side stand is exchanged, the space for preparation is greatly reduced, and the cost can be greatly reduced. Further, since rolls having different sizes are assembled and prepared in advance, replacement and assembly of the stand on the line can be performed in a short time, and work can be performed by a small number of people.

[Brief description of drawings]

FIG. 1 is a schematic side view of a pipe forming machine.

FIG. 2 is a front view of an embodiment of the present invention.

3 is an enlarged sectional view taken along the line III-III of FIG.

[Explanation of symbols]

Ao ... Coil A ... Strip plate B ... Bed 1 ... Drive side stand 2 ... Working side stand 3 ... Drive device 4 ... Universal joint 11 ... Drive side chock 12 ... Bearing 13 ... Sleeve
14 ... Receiving cylinder 15 ... Bearing 16 ... Drive shaft 21 ... Working side chock 22 ... Chock cover 23 ...
Bearing 24 ... Fall-out prevention 31 ... Roll shaft 31a ... Main part 31b ... Receiving part 31c ... Spline 3
1d ... Flange 32 ... Roll 33 ... Spacer 34 ... Nut

Claims (1)

[Claims] 1. A strip coil is rolled out in a horizontal direction from a strip coil in a horizontal plane, and upper and lower roll shafts along the width direction are provided above and below the strip plate. A pair of upper and lower forming rolls are fixed to the shaft, one end of these roll shafts is supported by a drive side stand and the other end is supported by a work side stand via a chock, and a drive device is installed on the side of the drive side stand via a universal joint. In a stand exchanging device of a pipe forming machine, in which a plurality of sets of the sets are connected and arranged in parallel in the horizontal direction of the strip feeding, and the strips are formed in a tubular shape, the working side stand is slidable in a roll axis direction with respect to a bed. A sleeve is rotatably accommodated inside the driving side chock via a bearing, and a receiving cylinder is projectingly provided on a driving device side of the driving side chock, and a bearing is provided inside thereof. To Then, a drive shaft having a spline hole is rotatably provided, a bearing is provided inside the working side chock, and the working side is detachably covered with a chock cover. The forming roll is fixed,
The receiving portions on both sides are slidably fitted to the sleeve and the bearing of the chock, and the drive side end portion of the roll shaft is provided with a spline and fitted to the spline hole of the drive shaft,
A stand exchanging device for a pipe making machine, characterized in that an end surface of the roll shaft on the working side is provided with a stopper.