JPH0241370B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a roll stand changing device for a forming machine for forming pipes and the like.

Conventionally, the reassembly work for rolls and roll stands has been carried out online by suspending the rolls together with the main shaft and bearing box using a crane, or by using a special reassembly device to pull the rolls out of the online system and replacing them with new rolls. A method is used to set the information online.

Normally, forming rolls are replaced depending on the type of production, the degree of roll wear, and the degree of occurrence of defects, but in the above methods, new rolls are placed outside the line, and old rolls are replaced on the line. After removing the new roll from the roll, a new roll is installed into the line, and further adjustments such as the distance between the rolls are made within the line.

Therefore, since two steps are required: a roll rearrangement work and an adjustment work when setting the rolls, the line downtime during roll replacement becomes long, and the line operation rate decreases, causing problems in terms of productivity.

In order to solve this problem when replacing rolls, rolls are changed for each roll stand that incorporates a roll shaft and chock, and the rolls are adjusted offline in advance. A roll changing device for a rolling mill is being considered, which allows rolling mill rolls to be moved online as they are and to be threaded immediately after reshuffling. The prior art is shown in FIGS. 6b and 6c.

FIG. 5B shows a roll stand recombination device for a rolling mill, which has a traversing truck 19 and a roll stand push/pull mechanism that can be transferred in the direction of movement of the traversing truck 19. And molding line 16 (online)
Roll stand assemblies 1 and 2 are arranged in the stand, and roll stand assemblies 8 and 9 incorporating new rolls are prepared in a spare stand storage area 17. These roll stand assemblies are rearranged by the traversing truck 19 moving the portion 18 that traverses the roll stand assemblies.

Figure c shows slide rails 5 and 2 for replacing rolls.
This is a roll changing facility for a rolling mill that uses at least two sets of lateral movement mechanisms, in which sets of pull-in rails 18, 18' are laid in parallel. In addition, molding line 1
Roll stand assemblies 1 and 2 are arranged at 6, and two roll stand assemblies 8, 9 and 8', 9' are arranged at two sets of retractable rails 18, 18' in a spare stand storage area 17, respectively. has been done. These roll stand assemblies are connected to a slide rail 5 and a retractable rail 1 which is the part that moves the roll stand assembly laterally.
8,18'.

However, this conventional technology requires a large installation space (especially in the line direction) for the roll changing device.
The space on the work side becomes small, which poses problems in terms of operability and maintainability. In addition, since the installation space for the device is large, the foundation and building area are correspondingly large, which increases maintenance costs, and furthermore, large-scale carts, retractable rails, etc. are required, resulting in a significant increase in equipment costs.

An object of the present invention is to provide a roll stand rearrangement device for a molding machine that solves these problems.

Hereinafter, the present invention will be explained based on embodiments shown in the accompanying drawings.

A plan view and a side view of six roll stands arranged in parallel on a line are shown in FIGS. 1 and 2, respectively.

In the figure, 1 and 2 are roll stand assemblies that move on the slide rail 5 in a direction perpendicular to the forming line 16 (online), and these roll stand assemblies 1 and 2 each have three load stands 3. ,4 is common base 20
built in above.

In addition, a new roll preparation line (spare stand storage area 17) located a required distance from the online side (forming line 16) of the slide rail 5 has a roll stand assembly incorporating roll stands 6 and 7 in which the new roll R2 is set. Place assemblies 8 and 9. Normally, the length of the slide rail 5 is set to be three times or more the width of each roll stand 3, 4, 6, 7.

Reference numeral 10 denotes a hydraulic cylinder serving as a moving device for pushing the roll stand assembly 1. A cylinder rod 10a connected to the roll stand assembly 1 moves the roll stand assembly 1 between the forming line 16 and the reserve by the operation of the hydraulic cylinder 10. It can be pushed out and moved to a rearrangement position that is an intermediate position between the stand storage area 17 and the stand storage area 17.
Also, other roll stand assemblies 2, 8,
Similar hydraulic cylinders 11, 12,
13 is provided to connect the rods 11a, 12a, and 13a, and is adapted to be pushed to the respective rearrangement positions.

A lifting device 14 for lifting and lowering the respective roll stand assemblies 1, 2, 8, and 9 is provided at the rearrangement position.
is provided. 3 and 4 are a front view and a side view showing the structure of this elevating device 14.

The lifting device 14 includes a machine frame 14a and a table 14d on which a rotatable disc-shaped roller 14f is placed.
Further, a hydraulic cylinder 14b having a rod 14c that comes into contact with the lower surface of the table 14d is built into the machine frame 14a in order to raise and lower the table 14d. Further, 14e indicates a guide rod inserted into the machine frame 14a to guide the table 14d.

Reference numeral 15 denotes a hydraulic cylinder serving as a moving device installed parallel to the line, and a hook 15b that engages with the lower surface of each roll stand assembly is attached to the tip of the rod 15a.

The old roll R ₁ to be replaced is built into the roll stands 3 and 4, while the new roll R ₂ is stored inside the roll stands 6 and 7 in the spare stand storage area 17.
will be incorporated. The new roll R ₂ in the roll stands 6 and 7 has already been adjusted online in the spare stand storage area 17, and the distance adjustment necessary for threading work has been completed in advance, and the roll stand assembly 8,
9 to the online forming line 16, sheet threading can be started immediately.

A reshuffling procedure using the roll stand reshuffling device having the above configuration will be explained with reference to the schematic diagram of FIG. 5.

Figure 5a shows the arrangement of each device before reassembly, with roll stand assemblies 1 and 2 on the online forming line 16, and other roll stand assemblies 8 and 9 being reassembled after preparation for threading. A standby state in which a roll is placed in the standby stand storage area 17 is shown. FIG. 5b shows a state in which the roll stand assembly 1 of the forming line 16 is moved from the standby state shown in FIG. 5a to the preliminary stand storage area 17. During this movement, the rod 10a of the cylinder 10 shown in FIG. Control the amount of extension.

As a result of the above, when the first position A in FIG. The roller 14f is fitted into the recess 1a on the lower surface of the roll stand assembly 1, and the rod 14c is further extended to raise the roll stand assembly 1 and move the roll stand assembly 1 above the slide rail 5. lift it up. At this point, the roll stand assembly 1 is supported by the roller 14f, and since the roller 14f is rotatable, the roll stand assembly 1 is movable in a direction parallel to the line. Next, the rod 15a of the cylinder 15
Extend it and use the hook 15b to reach B in Fig. 5b.
The roller stand assembly 8 is moved to the downstream side of the line shown in FIG.

After all the lifting devices 14 between the roll stand assembly 8 and the online position are lowered, the hydraulic cylinder 12 is operated to move the roll stand assembly 8 to the rearrangement position of the slide rail 5, and the hydraulic cylinder 12 is moved to the rearrangement position. The connection is released and linked to the hydraulic cylinder 10 on the line side. Then, as shown in Fig. 5c, by setting the roll stand assembly 8 online, the new roll R ₂
will be incorporated into the molding line 16.

Next, the lifting device 14 is raised by the amount of the lowering, and the hydraulic cylinder 15 moves the roll stand assembly 1 to the upstream side of the line, and when it is in parallel with the roll stand assembly 8, the lifting device 14 is lowered. Then, by horizontally suspending the roll stand assembly 1 on the slide rail 5, connecting it to the rod 12a of the hydraulic cylinder 12, and pulling it into the spare stand storage area 17 (Fig. 5d), the roll stand assembly 1 and the roll stand assembly are The reassembly work of assembly 8 is completed. By replacing the roll stand assembly above, roll stand 3
and the roll stand 6 having the new roll R ₂ can be performed, and one process of roll rearrangement is completed.

Next, the roll stand assembly 2 on the downstream side of the line is replaced with the roll stand assembly 9, but this is done in the manner shown in FIGS. 5e to 5g. The operation is the same as described above.

As a result of the above, a new roll is placed on the forming line 16.
Roll stands 6 and 7 having R ₂ are set,
Furthermore, since the new roll R ₂ has already undergone adjustments such as roll spacing in the spare stand storage area 17, it can be threaded immediately and the time required for roll changeover is shortened.

Next, a comparison between the installation space of the roll stand rearrangement device of the present invention and the prior art will be explained with reference to FIG. 6.

Figure a shows the case according to the present invention, and as already explained in FIG. 5 is a slide rail for vertically moving the roll stand assembly.

In the present invention, the slide rail 5 for vertical movement is assembled into an online roll stand assembly 1,
2 and spare stand storage area 17 assembly 8,
One set is provided directly between each of the nine spaces. Therefore, the line-direction equipment space for the roll stand recombination device only requires a length L that is approximately equal to the length of two sets of roll stand assemblies.

Figures b and c in the same figure are those explained in the section of the prior art, and figure b shows the case where lateral movement is performed using a cart system. In this example, since the traversing cart 19 moves in both directions to the position indicated by the two-dot chain line, the installation space in the line direction is approximately 2L, which is twice the installation space of the present invention.

For example, when replacing the roll stand assembly 1 with 8, the roll stand assembly 1 is first placed on the trolley 19. Then, the traversing truck 19 is moved to the right side, and the roll stand assembly 8 is passed through the traversing truck 19 to the forming line 1.
6. Set the roll stand assembly 1. Furthermore, after moving the traversing truck 19 to the left and returning it to the initial position, the roll stand assembly 1 of the traversing truck 19 is moved to the position of the roll stand assembly 8 of the forming line 16.

In this way, the traversing cart 19 moves within the section 18 for laterally moving the roll stand assembly between the standby stand storage area 17 and the forming line 16.
When exchanging using
needs to be moved left and right. Note that this truck system requires a large truck 19 for carrying two sets of roll stand assemblies.

Figure c shows slide rails 5 and 2 for replacing rolls.
Although the set of pull-in rails 18 and 18' are arranged in parallel, the installation space for the roll changing device (especially in the line direction) is wide, 2L, which is twice the installation space of the present invention. Note that in this prior art, when trying to replace the roll stand assembly 1 with the roll stand assembly 8,
First, the roll stand assembly 1 is moved to the position indicated by the two-dot chain line, then the preliminary roll stand assembly 8 is moved to the left, and then moved on the slide base 5 and set at position 1 on the forming line. Thereafter, the roll stand assembly 1 located at the position indicated by the two-dot chain line is moved to the position of the roll stand assembly 8'.

As described above, when compared with examples of the prior art, the present invention requires less installation space than the conventional method.

As described above, the present invention has the following remarkable effects.

Compared to conventional roll stand exchange equipment, the installation space is reduced, allowing for more space on the work side, allowing workers to enter the forming line, and providing a forming line with good operability and maintainability.

There is no need for a large truck or extra sliding space, resulting in a significant reduction in equipment costs.

As the installation space has become smaller, the basics of the equipment,
The area of the building is small, and equipment costs can be reduced from this point of view as well.

Since the entire roll stand after roll adjustment is reassembled, the reassembly time is only required to set the roll stand assembly online, reducing line downtime and improving productivity. can be achieved.

[Brief explanation of the drawing]

Fig. 1 is an overall plan view of the roll stand rearrangement device according to the present invention, Fig. 2 is a view taken along the line - in Fig. 1, Fig. 3 is a front view of the lifting device, and Fig. 4 is the same side view. FIG. 5 is a schematic diagram showing the procedure for rearranging the base, and FIG. 6 is a diagram showing a comparison of the installation space of the roll stand rearranging apparatus of the present invention and the conventional technology. 1, 2, 8, 9: Roll stand assembly, 3, 4, 6, 7: Roll stand, 5,
5': Slide rail, 10, 11, 12, 1
3: Movement device (cylinder) for moving on the slide rail, 15: Lateral movement device (cylinder), 14:
Lifting device, 14f: Roller for lateral movement, 16: Molding line (online), 17: Spare stand storage area (offline), 18: Portion for lateral movement of roll stand, 20: Common base.

Claims (1)

[Claims] 1. On the work side of the forming line where at least two sets of roll stand assemblies are arranged, there is a spare stand storage place for storing spare roll stand assemblies for reassembly, and a line with roll stand assemblies between the spare stand storage place and the forming line. and a lateral movement section for moving in the direction,
The lateral movement section is provided with an elevating device that rotatably supports the roll stand assembly and a lateral movement device, and the slide rail connecting the forming line and the preliminary stand storage area is connected to the roll stand assembly on the forming line. A roll stand rearranging device for a molding machine, characterized in that each set is provided perpendicularly to a molding line, and a moving device is provided for moving the roll stand assembly on the slide rail. .