JPH0322243B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a roll changing device used, for example, in a six-high rolling mill, and in particular to a roll changing device that can versatilely and quickly change work rolls and intermediate rolls. The present invention relates to a roll changing device for a corrugated rolling mill.

[Conventional technology]

A conventional roll changing device for work rolls and intermediate rolls used in a six-high rolling mill, for example, stacks the upper work roll on the lower work roll, and further stacks the upper intermediate roll on the upper work roll, and adjusts the interval between each roll. Generally, spacers were used to secure the space.

[Problem to be solved by the invention]

However, in such conventional equipment, if an emergency situation occurs while preparing to reassemble the work rolls,
When all of the work rolls and intermediate rolls have to be replaced, there is a problem in that time is required to prepare the upper intermediate roll.

In addition, when you want to replace only the work roll while preparing to change the work roll and intermediate roll,
There was also the problem that time was required to remove the upper intermediate roll from the upper work roll, and there was a limit to the reshuffling pattern, making it impossible to quickly reshuffle the rolls.

Further, in continuous mills, there was a problem in that the driving side of the spacer for ensuring the distance between the upper intermediate roll and the upper working roll got caught on the rolled material when passing through the continuous mill, making it impossible to change the rolls.

The present invention has been made in view of the above problems, and its object is to provide a roll changing device for a six-high rolling mill that can quickly perform various changing patterns with rolled material passed through the rolling mill. Our goal is to provide the following.

[Means to solve the problem]

The above object is to vertically separate a first rail on which an upper work roll and an upper intermediate roll are movable and a second rail on which a lower work roll and a lower intermediate roll are movable in a six-high rolling mill. the upper and lower work rolls and the upper and lower intermediate rolls are selectively moved between the housing of the rolling mill and the recombining cart. This is achieved by placing a moving mechanism on the recombination truck.

[Effect]

Among the upper and lower work rolls and the upper and lower intermediate rolls, any roll to be reassembled is moved from the housing of the rolling mill to the reassortment truck by a moving mechanism. Then, the rolls for recombination are moved by the moving mechanism from the recombination cart to the housing of the rolling mill, thereby performing roll recombination.

In other words, the first rail on which the upper work roll and the upper intermediate roll are movable and the second rail on which the lower work roll and the lower intermediate roll are movable are spaced apart in the vertical direction, and the housing of the rolling mill and the rearrangement trolley are separated. Since the upper and lower work rolls and the upper and lower intermediate rolls are each movable independently, any roll can be selectively rearranged, and various rolls can be made while the rolled material is being passed through the rolling mill. recombination patterns can be quickly performed.

〔Example〕

Next, one embodiment of the present invention will be described based on FIGS. 1 to 6.

As shown in FIG. 1, a rolling material 2 is still being passed through a rolling mill 1, and rails 3 and 4 are disposed in a housing via a project block (not shown). The upper intermediate roll 5, the upper work roll 6, the lower work roll 7, and the lower intermediate roll 8,
It is provided on the roll changing cart 9. These rolls 5, 6, 7, and 8 are in a standby state on an upper standby rail 10 and a lower standby rail 11 attached to a recombination truck 9. In addition, each roller 5,
6, 7, and 8 are provided with wheels 12 for easy running (FIG. 3).

A push puller 13 serving as a moving mechanism for these rolls 5, 6, 7, and 8 is connected to a cylinder 1.
4 and 15. cylinder 14,1
Reference numeral 5 is adapted to reciprocate the push puller in the longitudinal direction of the roll using hydraulic pressure.

The engagement mechanism between the push puller 13 and the rolls 5, 6, 7, and 8 will be explained based on FIG.

The upper work roll 6 has an upper work roll hook 16,
The lower work rolls 7 are engaged with lower work roll hooks 17, respectively, and are pushed and pulled as the push puller 13 reciprocates. Each hook 16, 17 of this hook type is connected to the hook cylinder 1.
8, it can be opened and closed by hydraulic pressure, and can be freely engaged and disengaged from the respective rolls 6 and 7.

The upper intermediate roll 5 is inserted into the push puller 13 through the upper bottle 19 through a hole formed in the push puller 13.
It is engaged with and can be pushed and pulled.

The lower intermediate roll 8 is connected to the push puller 13 via a dummy 20. That is, the lower intermediate roller 8 and the dummy 20 are connected by the lower bin 21,
Further, the protrusions 22 of the dummy 20 are inserted and fixed into the recesses formed in the push puller 13, so that they can be easily engaged and detached from each other.

The main body of the push puller 13 is structured so as not to come into contact with the upper intermediate roll 5 and the lower intermediate roll 8 that are on standby on the recombination truck 9 when the cylinders 14 and 15 are expanded and contracted.

Furthermore, as shown in FIG. 4, a side shift cart 23 is installed to quickly replace the old roll with the new roll.
is provided. This side shift trolley 23
is movable by a side shift cylinder 24 in a direction perpendicular to the longitudinal direction of the roll.

Next, the role reshuffling procedure will be explained.

Normally, each roll 5, 6, 7 is placed on the rearrangement cart 9 during rolling in preparation for breakage of the rolls due to abnormal rolling.
and 8 can be performed in any recombination pattern,
They are waiting on the upper and lower standby rails 10 and 11, respectively.

As an example, if the rearrangement pattern is such that only the upper and lower work rolls 6 and 7 are rearranged, these upper and lower work rolls 6 and 7 are moved to the push puller 13.
The roll is pulled out from the rolling mill 1 and the upper and lower work rolls 6 and 7 are removed.

Next, the position of the side shift truck 23 shown in FIG. 4 is side shifted by the side shift cylinder 24 to bring it into the state shown in FIG.

Here, the dummy 20, upper bin 19, and lower bin 21 attached to the push puller 13 are removed, and the push puller 13 and the upper and lower intermediate rolls 5,
8 and insert the push puller 13 into the rolling mill 1 using the cylinders 14 and 15.
The push puller 13 releases new upper and lower work rolls 6 and 7 without contacting the upper and lower intermediate rolls 5 and 8.
can be pushed into the rolling mill 1 (the state shown in FIG. 2).

Finally, hydraulic pressure is applied to the hook cylinder 18 to move the upper work roll hook 16 and the lower work roll hook 1.
7 from the upper work roll 6 and lower work roll 7, respectively, the cylinders 14 and 15 are retracted, and the push puller 13 is returned to its original position to complete the reassembly.

5 and 6, upper and lower work rolls 6,
7 and upper and lower intermediate rolls 5 and 8 are reassembled at the same time.

In this case, dummy 20 is placed on push puller 13.
, insert the upper pin 19 into the upper intermediate roll 5 and the lower pin 21 into the lower intermediate roll 8, and the rest of the reassembly work is the same as the reassembly work of the upper and lower work rolls 6 and 7. The description will be omitted.

In this way, by pushing and pulling the push puller 13, the rolls 5, 6, 7, and 8 can be easily rearranged.

The shapes of the engaging portions of the push puller 13 with the rolls 5, 6, 7, and 8 include a pin type and a hook type. 19 and 21 were used, but as shown in Fig. 7, the upper and lower work rolls 6,
If a hook method similar to 7 is used, engagement and disengagement can be performed more easily. That is, hydraulic cylinders 25 and 26 are provided at the hooks for pushing and pulling the upper intermediate roll 5 and the lower intermediate roll 8, respectively.

According to this engagement/disengagement mechanism, a pattern of rearranging only the work rolls or simultaneous rearrangement of the work rolls and intermediate rolls can be easily obtained by hydraulic operation.

Furthermore, in the above embodiment, a side-shift type rearrangement using the push puller 13 has been described, but a push-out type rearrangement device is also possible.

FIG. 8 shows the main part of another embodiment using this push-out method. The same parts as those in the previous embodiment are given the same reference numerals, and detailed description thereof will be omitted.

For example, when rearranging the upper and lower intermediate rolls 5 and 8 and the upper and lower work rolls 6 and 7 at the same time, it is sufficient to set the intermediate roll hooks 28 and 29 of the pusher 27 to the positions shown. Also, when only the upper and lower work rolls 6 and 7 are rearranged, use the intermediate roll hook 2.
If the rolls 8 and 29 are rotated by the handles 30 and 31 and stored in the pusher 27 as shown by the imaginary lines in the figure, only the upper and lower work rolls will be pushed out without pushing the upper and lower intermediate rolls 5 and 8. become. In this embodiment, an inexpensive pusher 27 is obtained.

Furthermore, although not shown, a pull method may be adopted in which a puller is provided that only pulls the roll.

In addition, various rearrangement patterns are possible for each roll, such as only intermediate rolls can be rearranged without making the work rolls stand by on the roll rearrangement cart.

〔Effect of the invention〕

As described above, according to the present invention, since a dedicated rail is used to move each roll in the roll axis direction, each roll can be moved independently, and various assemblies can be made with the rolled material passed through the rolling mill. A roll changing device for a six-high rolling mill capable of changing patterns is obtained.

[Brief explanation of the drawing]

1 and 2 are explanatory diagrams of a working roll recombination pattern according to an embodiment of the present invention, FIG. 3 is an explanatory diagram of the main parts of a push puller, and FIG. 4 is a sectional view of a roll recombination cart. , FIG. 5 and FIG. 6 are explanatory diagrams of the same work roll and intermediate roll simultaneous rearrangement pattern, and FIG. 7 is an explanatory diagram showing another example of the push puller,
FIG. 8 is an explanatory diagram of main parts of another embodiment of the present invention. 1... Rolling mill, 3, 4... Rail, 5... Upper intermediate roll, 6... Upper work roll, 7... Lower work roll, 8...
Lower intermediate roll, 9... Recombination truck, 10... Upper standby rail, 11... Lower standby rail, 13... Push puller, 16... Hook for upper work roll, 17... Hook for lower work roll, 18... Hook cylinder, 19
...Upper pin, 21...Lower pin, 23...Side shift trolley, 24...Side shift cylinder, 25, 26
... Hydraulic cylinder, 27... Pusher, 28,2
9...Hook for intermediate roll.

Claims (1)

[Scope of Claims] 1. A roll changing device for a six-high rolling mill that changes rolls by moving the rolls along their longitudinal direction on rails provided on the housing and changing truck of the rolling mill, A first rail on which an upper work roll and an upper intermediate roll are movable and a second rail on which a lower work roll and a lower intermediate roll are movable are vertically spaced apart from each other, and the housing and assembly of the rolling mill are constructed. Further, a moving mechanism is installed on the recombining trolley and selectively moves any roll of the upper and lower work rolls and the upper and lower intermediate rolls between the housing of the rolling mill and the recombining trolley. A roll changing device for a six-high rolling mill, characterized in that: 2. The roll changing device for a six-high rolling mill according to claim 1, wherein the moving mechanism includes a push puller for pushing and pulling the upper and lower work rolls and the upper and lower intermediate rolls. 3. The roll changing device for a six-high rolling mill according to claim 1, wherein the moving mechanism includes a pusher for pushing the upper and lower work rolls and the upper and lower intermediate rolls toward the rolling mill. 4. The roll changing device for a six-high rolling mill as set forth in claim 1, wherein the moving mechanism includes a puller for pulling out the upper and lower work rolls and the upper and lower intermediate rolls toward the changing cart. 5. The moving mechanism is provided with an engagement mechanism that selectively and detachably engages with any roll among the upper and lower work rolls and the upper and lower intermediate rolls. A roll changing device for a six-high rolling mill as described in each item 4. 6. The roll changing device for a six-high rolling mill according to claim 5, wherein the engagement and disengagement of the engagement mechanism with any of the rolls is performed by applying a working fluid to a cylinder.