JPH0434964Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a grinding waste wiper for a roll grinding device that is provided with a means for removing grinding waste generated during roll grinding so that it does not get caught in the roll.

[Prior art] Rolling is performed by squeezing the material to be rolled between a pair of upper and lower work rolls and rolling it down due to the frictional force generated between the work rolls and the material to be rolled. As rolling continues, the surface of the work roll gradually wears out and becomes rough. Wear and roughness on the roll surface greatly affect the shape and profile of the rolled strip, so in order to avoid defects in the shape and profile of the strip, it is necessary to perform scheduled rolling and periodically grind the work roll. .

However, since this roll grinding work is performed in a roll shop after removing the rolls from the rolling mill, it is necessary to frequently stop the rolling operation, resulting in a problem of poor productivity. Therefore, in order to solve this problem, for example,
156507 and Japanese Patent Application Laid-open No. 163509/1983, it has been proposed to install a roll grinding device equipped with a grinding belt in a rolling mill to grind work rolls during rolling operation. This is shown in FIG.

In the figure, 1a is an upper work roll, 1b is a lower work roll, and 1a and 1b form a pair to bite and roll the material to be rolled S to roll it.
2 is a back up roll that rolls down the work roll 1a. 3 is a grinding head of a roll grinding device for grinding the work roll 1a, 4 is a platen at the tip of a reciprocating cylinder (not shown); 5 is a grinding head of a roll grinding device for grinding the work roll 1a;
6 is a guide roller disposed above and below it, and 6 is a grinding belt. Grinding is performed by pressing the grinding belt 6 against the work roll 1a rotating on the platen 4. 7a is a wiper plate of the grinding waste wiper 7, the tip of which is in contact with the work roll 1a, and by receiving the grinding waste 8 generated by grinding, the grinding waste 8 falls onto the rolled material S. It is designed to prevent it from being caught between it and the work roll 1a.

[Problem that the invention attempts to solve]

However, in the case of such conventional grinding waste wipers, the tip of the wiper plate that is in contact with the work roll separates from the work roll surface due to vibration or impact during rolling, or due to wear of the work roll. When a gap occurs between the work roll and the tip of the wiper plate, the grinding debris on the wiper plate falls from this gap onto the steel plate being rolled and gets caught up in the work roll, causing surface flaws in the steel plate or roll flaws. There was a problem that this occurred.

The present invention has been developed in view of these conventional problems, and aims to solve the above problems by providing a wiper plate with a fluid header and a grinding debris guide plate.

[Means for solving problems]

This idea consists of a fluid header that injects fluid upward onto the wiper plate of the grinding waste wiper as if it is reflected off the roll surface, and a fluid header that has its lower side fixed to the wiper plate and its upper side that approaches the roll surface and that is injected. This is a grinding waste wiper for a roll grinding device, which is equipped with a grinding waste guide plate provided near a fluid header so as not to interfere with the fluid header.

[Effect]

When a work roll is ground by a roll grinding device during operation of a rolling mill, generated grinding debris begins to fall. At this time, fluid is jetted upward from a fluid header provided on the wiper plate of the grinding waste wiper. When the jetted fluid collides with the work roll and is reflected on its surface, it entrains the work roll surface and the falling grinding debris, and falls on the side of the grinding debris guide plate opposite to the work roll. If the fluid is liquid, the fallen grinding debris flows along the lower side of the grinding debris guide plate on the wiper plate together with the liquid, flows down from the side edge of the wiper plate, and is removed. Therefore, grinding debris does not fall onto the material to be rolled and become caught in the rolls of the rolling mill.

〔Example〕

This invention will be explained below based on the drawings. 1st
Figures 5 to 5 are diagrams showing an embodiment of the invention.

10 is a rolling mill, and 11 is a housing post of the rolling mill. Guide beams 12 and 13 are installed between the housing posts on the entry side of the work roll 1a and parallel to the work roll 1a.
14 is a traverse frame provided movably on the guide beams 12 and 13. 15,
A shaft 16 is rotatably provided between the guide beams 12 and 13. Sprockets 17 and 18 are fixed near both ends of the shaft, and a chain 19 is stretched between the sprockets 17 and 18. In addition, the shaft 16 is connected to the gearbox 2.
0 and connected to a motor 21, and a position detector 22 is connected to the motor 21.

The chain 19 and the traverse frame 14 are connected by claws 23 near each of the guide beams 12 and 13, and when the chain 19 is rotated by the motor 21, the traverse frame 14 is parallel to the axis of the work roll 1a. It is now possible to move to

A grinding head 3 composed of a platen 4 and guide rolls 5 arranged above and below the platen is provided on a traverse frame 14 so as to be able to approach and separate from the work roll 1a, and the grinding head 3 is connected to a fluid pressure cylinder 24. installed. Reference numeral 25 denotes a reel storage section, which is attached to the traverse frame 14 so as to extend above and below the fluid pressure cylinder 24, and has an open side facing the cartridge holder 26, and which extends above and below the fluid pressure cylinder 24. Mandrels 27, 27 are provided. Also, the main shafts of the mandrels 27, 27 have reels 28, 28.
is attached and rotated by a motor 29. A grinding belt 6 is wound around both reels 28, 28, and this grinding belt is wound around the guide roll 5 and the platen 4 as described above.

A cartridge pedestal 26 is provided at the end of the previous guide beam 12, and a cartridge 30 can be positioned and placed on this pedestal 26.

31 is a cooling water header, and nozzle 3 of this header
2, cooling water is injected onto the work roll 1a.

The wiper plate 7a is formed to have approximately the same length as the body length of the work roll 1a, is rotatably supported by a bracket 33 provided on the housing post 11, and is supported by a fluid pressure cylinder 34 attached to this bracket. The tip thereof is pressed against the work roll 1a. 35 is work roll 1a
A fluid header (a high-pressure water header in the embodiment) formed to have the same length as the body length of the header 35, which is provided on the wiper plate 7a in parallel with the work roll 1a, and from a large number of nozzles 35a of this header 35 to the embodiment In this case, when high-pressure water is jetted upward, it collides with the work roll 1a and is reflected (3rd, 4th, 5th).
(see figure). Further, this high-pressure water is jetted flatly in the horizontal direction from the nozzle 35a at an angle α. 3
Reference numeral 6 denotes a grinding waste guide plate, which is located on the opposite side of the fluid header 35 with respect to the roll 1a (FIG. 3), its lower side is fixed on the wiper plate 7a along the fluid header 35, and its upper side is fixed on the wiper plate 7a. 1a.

Next, the grinding of the work roll 1a will be explained.

First, the fluid pressure cylinder 24 is driven to press the grinding head 3 against the rotating work roll 1a, while the motor 29 is started to move the grinding head 6 wound around the reel 28 through the guide roll 5 and the platen 4. When grinding is started by gently rotating the blade, grinding debris 8 begins to fall. At this time, high-pressure water is injected upward from the fluid header 35, collides with the work roll 1a, peels off the grinding debris from its surface, and entrains the falling grinding debris, which is then turned over on the surface of the work roll 1a and removes the grinding debris. The mixture 37 of water and grinding debris falls outward from the work roll 1a of the guide plate 36 and collects in the groove-shaped portion formed by the guide plate 36 and the wiper plate 7a. The collected mixture 37 then flows through the groove-shaped portion along the longitudinal direction of the guide plate 36, and the wiper plate 7a
It falls through the gap between the housing post 11 and the housing post 11 and is removed.

Further, the roll grinding device 50 attached to the traverse frame 14 placed on the guide beams 12 and 13 is movable along the lengthwise direction of the work roll 1a by starting the motor 21. , grinding can be performed over the entire length of the work roll 1a.

Note that the fluid injected from the nozzle 35a may be cooling water to assist in cooling the roll, or compressed air may be used as the fluid.

FIG. 4 shows another embodiment in which a grinding debris guide plate 36 is provided on a wiper plate 7a between a fluid header 35 and a work roll 1a, in which grinding debris 8 is disposed as in the previous embodiment. This prevents it from falling into the tip 7b of the wiper plate 7a.

[Effect of idea]

As explained above, this invention prevents the occurrence of surface flaws on the roll or product due to falling grinding debris biting the roll during roll grinding during rolling operation, reduces the defective rate of the product, and improves productivity. You can get the effect of being able to improve.

[Brief explanation of drawings]

Fig. 1 is a schematic explanatory diagram of an embodiment according to the present invention, Fig. 2 is a view taken in the direction of arrow A in Fig. 1, Fig. 3 is a partial detailed diagram of the embodiment, and Fig. 4 is a partial detailed diagram of another embodiment. FIG. 5 is a diagram showing a high-pressure water injection situation, and FIG. 6 is a partially detailed diagram of a conventional example. 1a, 1b... Work roll, 7... Grinding waste wiper, 7a... Wiper plate, 10... Rolling machine, 35
... Fluid header, 36 ... Grinding waste guide plate, 50
...Roll grinding device.

Claims (1)

[Scope of utility model registration request] A grinding waste wiper attached to a roll grinding device capable of grinding rolls of a rolling mill during operation includes a fluid header that injects fluid upward onto the wiper plate of the grinding waste wiper so as to be reflected on the roll surface; , a grinding debris guide plate having a lower side fixed to the wiper plate and an upper side close to the roll surface and provided near the fluid header so as not to interfere with the jetted fluid. Grinding waste wiper.