JPS5815259B2 - Roll grinding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a D-roll grinding device that streamlines the work of grinding work rolls in a rolling mill, reduces the number of workers required for rolling, and contributes to labor savings in a rolling mill. It is something.

Since the surface of the body of the work roll used in a rolling mill is worn out by rolling, it is necessary to remove the work roll from the rolling mill at regular intervals and reassemble the rolls by incorporating ground work rolls.

Further, in order to reuse the work roll taken out from the rolling mill, it is necessary to grind the worn roll body surface.

In order to grind the surface of the roll body, the bearing box called a chock that is attached to the roll is generally removed, the roll is placed on a roll grinder as a single unit, the roll body is ground, and the chock is reattached to it. This tedious work is being done.

For this reason, the rolling line has been greatly reduced in labor through computer control of the rolling mill, but the attached roll shop requires a lot of work to disassemble and assemble the rolls and chocks, and to grind the rolls. It requires personnel.

Therefore, in order to rationalize and save labor in the rolling mill as a whole, how to save labor in the roll shop is an important key.

Attempts to save labor in roll shops include automating roll grinding itself and grinding with chocks attached to the rolls.

However, in the conventional grinding of chocked rolls, the upper and lower rolls are separated, and the rolls are mounted on separate roll grinders for grinding.

For this reason, it required manpower to disassemble the upper and lower rolls and reconnect them after grinding.

Additionally, these operations were carried out within the roll shop using an overhead lane.

Therefore, even if grinding of rolls with chocks is adopted, labor saving is naturally limited, as many crane operators and crane operators have to be engaged in transportation work in roll shops. was there.

The present invention has been made based on the above circumstances, and its object is to be able to simultaneously pull out a pair of work rolls used for rolling with the chocks still attached and grind both work rolls simultaneously, and to use a crane or the like. The purpose of the present invention is to provide a roll grinding device that is configured to be movable without having to move, thereby significantly improving workability and saving labor.

An embodiment of a grinding device according to the present invention will be described below with reference to the drawings.

In FIG. 1, a plurality of rolling mill stands 11 are arranged in series, and two upper and lower work rolls are rotatably supported by an upper chock and a lower chock and incorporated into the rolling mill stand 11.

In addition, the state removed from the rolling mill stand 11 is shown in FIG. 2, and 12.13 is a work roll, 14 is an upper chock that rotatably supports the upper roll 12 at both ends, and 15
is a lower chock that similarly supports the lower roll 13, the upper chock 14 and the lower chock 15 are connected, and the lower chock 15 is equipped with wheels 16 so as to be movable in the roll axis direction.

Reference numeral 17 denotes a rail that is continuous with each rolling mill stand 11 and installed in the roll axis direction.

As the wheels 16 of the lower chock 15 carrying the upper chock 14 roll on the rails 17, the work roll is taken out of the rolling mill stand 11 with the upper and lower chocks assembled.

Reference numeral 18 denotes a transfer trolley, which has a plurality of rails 19 on its upper surface that have the same cross section as the rails 11 and extend to each rail 17, and is guided by the rails 20 and can run in a direction perpendicular to the roll axis direction. The rails 19 are provided with twice as many rails as the number of rolling mill stands, and the running distance is such that at least two or more adjacent rail sets of the rails 19 can contact each rolling mill stand rail 17. It is configured.

21 is a group of rails in a roll shop.

The rail group 21 is laid in the roll axis direction at the same pitch as the rails 19 on the transfer trolley 18, and serves as a track for supplying the chocked rolls to be re-ground from each rolling mill stand 11 to the roll grinding machine. .

It consists of a track adjacent to the track for supplying chocked rolls that have already been reground to the rolling mill stand.

In addition, the rail group 21 functions as a reciprocating track connecting the roll grinder and each rolling mill stand, as well as cooling, inspecting, and repairing the rolls and chocks before grinding, inspecting the rolls after grinding, and repairing and holding the chocks. Functions as a service yard,
and has an appropriate length to satisfy the function of a stocker yard simply as a roll waiting area.

That is, a pair of chocked rolls pulled out from the rolling mill stand 11 onto the rail 17 run on the rail 19 of the transfer trolley 18 which is an extension of the rail 17, and further on the rail 19.
It reaches the rail 21 of the roll shop, which is an extension of the rail.

On the other hand, a pair of chocked rolls that have been reground to be installed next on the rolling mill stand 11 are mounted on the rail 21 of the roll shop.
It is placed on the rail 19 adjacent to the rail 19 of the transfer trolley 18 from above and is on standby.

Then, when the transfer trolley 18 is moved in the required direction by one pitch of the rail, the rail 19 carrying the rolls is aligned with the rail 17, so a pair of chocked rolls can be pulled out by performing an operation opposite to the method of pulling out the rolls. is installed in the rolling mill stand.

Thus, the transfer truck 18 has the function of pulling out the pair of chocked rolls from each rolling mill stand 11 and supplying the pair of chocked rolls in M to the rolling mill stand in a short time.

22 is on the extension of the roll shop rail group 21,
A transfer trolley 25 has a set of rails 23 (shown in FIG. 2) having the same cross section as the rail 21 on its upper surface, and is guided by the rails 24 and can run in a direction perpendicular to the roll axis direction.
A rail 2 installed in the middle and continuous with the rail 24 on the top surface.
27 is a roll grinding machine group in which a plurality of roll grinders 28 are lined up, 29 receives a pair of chocked rolls from the transfer trolley 22, and places the same rolls in the grinding position of the roll grinding machine 28. The grinding cart 30 is a rail that guides the traveling of the grinding cart 290, and the rotary table 25 is provided at the intersection of the transfer cart guide rail 24 and the grinding cart guide rail 30.

That is, when the rails 26 of the rotary table 25 are aligned with the rails 24, the transfer trolley 22 is aligned with the rotary table 25.
When the rail 26 is aligned with the grinding cart guide rail 30, the grinding cart 29 is placed on the upper surface of the rotary table 25, and is then placed on the transfer cart 22 as described later. The roll is configured to be delivered to a grinding cart 29.

The chocked roll that has been cooled, inspected and repaired on the rail 21 of the roll shop moves on the rail 21,
The rails 23 are arranged on an extension of the rails 21 to reach a transfer cart 22.

The transfer cart 22 moves in a direction perpendicular to the roll axis direction while carrying the pair of chocked rolls thereon.

On the other hand, the grinding cart 29 for the roll grinding machine 28 in the roll grinding machine group 27 that is waiting for grinding is guided by the rail 30 and positioned on the rotary table 25, and the transfer cart 22
The machine waits for the machine to bring the roll to be ground.

Then, when the roll to be ground is delivered with the chock attached from the transfer cart 22 to the grinding cart 29 as described later, the grinding cart 29 runs on the rail 30 and brings the roll to the grinding position of the roll grinding machine 28. It transports the

Next, details of the grinding cart 29 will be explained with reference to FIGS. 2 to 5.

31 is the frame of the grinding cart 29, 32 is the frame 31
The rail 2 of the rotary table 25 is rotatably supported by
Wheels 33 rolling on the rails 30 of the roll grinding machine group 21 as well as the wheels 33 are a grinding cart traveling drive device, 34 is a pedestal that can rotate 90 degrees in a vertical plane about the fulcrum 35 of the frame 31, and 36 is a This is a turning device for rotating the pedestal 34, and on the top surface of the pedestal 34 there is a ramp that can be moved in and out by hydraulic or electric power in the left and right direction to clamp the upper and lower chocks 14 and 15, as shown in detail in Fig. 4. Clamping devices 38 to 41 having a shaft 37, a push-up shaft 42 that moves in and out in the vertical direction to adjust the vertical position of the upper and lower chocks 14 and 15, and a journal portion of the roll and the chock as shown in detail in FIG. A pressing shaft 4 that presses each roll to one side in order to restrict roll swing due to the gap between inner bearings.
3.

A fork 45 is provided which is positioned between the upper and lower rolls and supports their weight when the pair of chocked rolls is turned.

Two sets of the pedestals 34 and associated devices are installed on the frame 31 so as to be located below each chock in the roll axis direction.

There, the grinding cart 29 is transferred to the upper surface of the rotary table 25 and is placed on standby.The grinding cart 29 is moved into a vertical plane by rotating the two sets of pedestals 34 on the frame 31 about the fulcrum 35 by the turning device 36.
It turns 0 degrees and is in the state shown in FIG.

In addition, the clamping devices 38 - attached to the two sets of pedestals 34
The clamp shaft 3γ of 41, the push-up shaft 42, and the push shaft 43 of the steadying device 44 are retracted by a required amount to accommodate the chock and roll.

On the upper surface of the rotary table 25, a grinding cart 29 is placed with 46 cart clamp devices so as to be stable when receiving and delivering chocked rolls.

When the transfer trolley 22 carrying the chocked rolls approaches the grinding trolley 29 that is waiting in this way, it runs in a direction perpendicular to the roll axis direction, resulting in a state as shown in FIG.

Here, the clamp shafts 37 and push-up shafts 42 of the clamp devices 38 to 41 are moved forward by a predetermined amount, and after clamping the ends of the upper and lower chocks, most of the weight of the roll with chocks is supported by the fork 45, and the pedestal 34 is moved as described above. Conversely, when the grinding cart 29 and the chocked roll are turned 90 degrees in a vertical plane in a similar manner, the relative positions of the grinding cart 29 and the chocked roll as shown in FIG. 3 are maintained.

In this way, the chocked roll is transferred from the transfer trolley 22 onto the grinding trolley 29 with its posture rotated 90 degrees in the vertical plane, and the grinding trolley 29 runs on the rail 30 V, and the chocked roll is located at a predetermined position on the roll grinder 28.

Next, the configuration of the roll grinder 28 will be explained.
In the figure, 50 is a headstock that simultaneously drives two chocked rolls placed on the grinding cart 29, and 51 is a two-way headstock.
Universal couplings 52 that connect the book roll and the two drive shafts of the headstock 500 are located on both sides of the grinding cart 29, as shown in detail in FIG. 3, and have sliding surfaces formed on their upper surfaces. 53 is a carriage that can slide on the bed 52 in the roll axis direction; 54 is a part of a traverse device that allows the carriage 53 to reciprocate within a certain range of the bed 52; 55 is supported by the carriage 53; The wheel stand 56 is movable in the direction approaching the roll.
a cutting device 57 for moving the grinding wheel head 5;
A wheel 58 is a wheel rotatably supported by a wheel holder 55 and fixed to the tip of a wheel spindle that is collapsed parallel to the roll axis. This is a wheel drive device.

The roll grinder 28 is equipped with grinding oil supply and discharge devices and other auxiliary devices necessary for grinding, although not shown.

Further, at the bottom of the grinding cart at the roll grinding position, as shown in FIG. A block 61.62 is provided which engages block 59.60.

When the grinding cart 29 is positioned at a predetermined position on the roll grinding machine 28, the wheel 32 supported by the frame 31 is rotated by an appropriate amount in a vertical plane around the axis provided in alignment with the rotation axis of the wheel 32. Rotate.

Then, the grinding cart 29 and the chocked roll are lowered by a small amount, and the blocks 61, 62 of the grinding cart 29 are placed on the chevron-shaped and flat-shaped guide blocks 59, 60, and the grinding cart 29 is stabilized.

Therefore, the shaft end of the roll is coupled to the drive shaft of the headstock 50 by a universal coupling 51.

On the other hand, the clamp shaft 3 of the clamp devices 38 to 41 of the pedestal 34
7 and the push-up shaft 42 again to adjust the centering of each roll, and finally the steady stop device 44
Pressing the roll with an appropriate force by the pressing shaft 43 restricts the swinging of the roll due to the gap between the roll journal and the bearing in the chock.

With the above, the preparations before the grinding work are completed, and the cutting device 56 sends the wheel 5γ positioned on both sides of the roll in the radial direction of the roll, and the truss device 54 sends it in the axial direction of the roll. and the chocked roll are ground at the same time. After the grinding is completed, the chocked roll is transferred to the roll supply track of the rail group 21 of the roll shop via the transfer trolley 22 in the opposite manner to that described above, and as described above. After being subjected to predetermined operations, it is again supplied to the rolling mill stand 11.

As explained above, the present invention includes a roll conveyance rail laid on the floor, and a pedestal that can run on the rail and swing a pair of chocked rolls to horizontal and vertical positions around a binding axis. Further, a clamp device for fixing the chock portion of the chocked roll is provided on the same pedestal, and a roll grinding trolley is further provided with a steady rest device for supporting the roll portion of the chocked roll, and the rail is placed between the two. It is a roll grinding device consisting of a pair of roll grinders.

Therefore, a pair of work rolls used for rolling can be pulled out together and re-grinded at the same time without separating the body surfaces with chocks attached, and after re-grinding, it can be used for rolling in that state. This reduces work time and greatly improves work efficiency.

Additionally, no crane is used to move the rolls during this time.
Since everything can be done using rails or trolleys, automation and unmanned operation can be easily achieved by automating these individual moving devices and organically controlling them using a computer or the like.

As for roll grinding, automatic grinding technology has already been developed, so if this technology is combined with the present invention, it will be possible to completely unmanned operation of the roll shop.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing the layout of a roll shop from a rolling mill stand to a roll grinding machine, which is realized by the method of the present invention, and Fig. 2 is a sectional view taken along lines 1 to 2 of the roll grinding machine. Figure 3 shows the state immediately before supplying the chocked roll. Figure 3 is a cross-sectional view taken along the lines ■ to ■ in Figure 1, which is a plane perpendicular to the roll axis of a roll grinding machine that simultaneously grinds the upper and lower rolls while the chocked roll is combined. FIG. 4 is a cross-sectional view showing the chock lamp device of the grinding cart in detail, and FIG. 5 is a cross-sectional view showing the roll steadying device of the grinding cart in detail.

Claims (1)

[Claims] 1. A rail for transporting the rolls laid at the destination, and a pedestal that can run on the rail and allow a pair of chocked rolls to swing in horizontal and vertical positions around one axis, and the chocks are attached to the pedestal. A roll consisting of a roll grinding cart provided with a clamp device for fixing the chock portion of the chocked roll, and further provided with a steady rest device for supporting the roll portion of the chocked roll, and a pair of roll grinders arranged to sandwich the rail. Grinding equipment.