JPH04313407A - Protection device for thickness gauge between rolling mill stands - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protection device for a thickness gauge installed between rolling mill stands in a hot rolling or cold rolling mill of a steel mill.

0002

[Prior Art] To control the thickness of rolled material in rolling equipment, a thickness gauge is required to measure the thickness of the rolled material.An example of installing such a thickness gauge is to install a thickness gauge on the exit side of the final stand of a finishing rolling mill. However, in recent years, as thickness control becomes more precise, there are examples of thickness gauges being installed between rolling mill stands.

0003

[Problem to be Solved by the Invention] By the way, when a thickness gauge is installed between rolling mill stands, there is a risk that the thickness gauge will be damaged due to runaway of the rolled material between the stands due to misrolls. It is necessary to provide some kind of protection. However, since inter-stand thickness gauges are rarely installed, no protection device has been established at present.

[0004] The following conditions must be met by the protection device for the thickness gauge between rolling mill stands. ■After a misroll occurs, a space that does not interfere with misroll processing can be quickly secured. ■It must have the strength to withstand the impact when a misroll occurs. ■Do not obstruct the operator's visual field of view of the strip between the stands.

An object of the present invention is to provide a protection device for a thickness gauge between stands of a rolling mill that meets the above conditions and protects the thickness gauge from runaway of rolled material between the stands due to misrolls.

[0006]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a pair of protectors via shafts to bearing portions provided in the housing on both sides between the stands into which the thickness gauge is inserted. These protectors are installed facing each other so that they can be opened and closed, and the tips of these protectors are provided with holes through which the X-rays from the thickness gauge pass, and are lapped together, and an opening/closing mechanism is provided to open and close both protectors. To provide a protection device for a thickness gauge between rolling mill stands, which is provided with a removable stopper mechanism that prevents the protector from moving in the direction of the thickness gauge when the protector is engaged.

Further, the pair of protectors are located near the pass line center between the stands, and the stopper mechanism is removably provided on a stopper portion provided on the shaft and on the bearing portion. The structure is such that the stopper and pin are tightly connected when an abnormal load is applied to the protector.

[0008]

[Operation] When the thickness gauge is used, both protectors are lowered and the tips are wrapped in a closed state to protect the thickness gauge from misrolls, and the abnormal load caused by misrolls is absorbed by the stopper mechanism. During misroll processing, the stopper mechanism is removed and the opening/closing mechanism is operated to raise both protectors to the open state. When the stopper mechanism is composed of a stopper portion of the shaft and a pin removably provided on the bearing portion, the stopper mechanism is disassembled by removing the pin, and the abnormal load due to misroll is absorbed by the tight connection between the stopper and the pin.

Furthermore, since the protectors are installed facing each other near the pass line center between the stands where the thickness gauge is inserted, even if the operator's line of sight is diagonally above the protector, the protector will not obstruct the operator's visual field of view of the strip between the stands. Not.

0010

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. In FIG. 1, 10 and 11 are adjacent rolling mill stands having housings 12 and 13, respectively. A thickness gauge 1 is installed between the rolling mill stands 10 and 11.
4 is installed.

The protection device for the thickness gauge 14 is the stand 10,1.
It is divided into two parts, each having similar equipment and functions. That is, the protective device has a pair of protectors 1, 1 located opposite to each other near the pass line center between the stands 10, 11, and the tips of the protectors 1, 1 are provided with holes 1a having a thickness gauge 14 through which X-rays pass. , 1a are opened, and when the protectors 1, 1 are in the closed state, these holes 1a, 1a overlap as shown in the figure. The protectors 1, 1 include housings 12, 13 on both sides of the operating side and the driving side of the stands 10, 11, respectively.
A pair of bearing portions 4, 4 provided respectively in
2 has stoppers 3, 3 protruding adjacent to one bearing part 4, and a pin 5 that engages with the stoppers 3, 3 is removably mounted on the bearing part 4. protector 1,
1, the shafts 2, 2 and the stoppers 3, 3 are each integrally constructed, and a beam 15 is stretched between both sides at the upper part of each housing 12, 13, and an air cylinder 6 is pivotally attached to this beam 15. installed, air cylinder 6
, 6 are connected to appropriate positions of the protectors 1, 1 via chains 7, 7. Note that a link mechanism may be used instead of the chain. 16 and 17 are guides for rolled material, 18
is a looper that applies tension to the rolled material.

When using the thickness gauge 14, protector 1
, 1 are lowered and closed as shown by the solid line in the figure, and the holes 1a, 1 provided at the tips of the protectors 1, 1
a allows the X-rays of the thickness gauge 14 to pass through. Both protectors 1, 1 are tightly connected by contact between stoppers 3, 3 provided on shafts 2, 2 and pins 5, 5 provided in bearing parts 4, 4, and rolled material collides with protectors 1, 1 due to misrolling. The abnormal load is on shafts 2, 2 and stoppers 3, 3.
This prevents the protectors 1, 1 from rising and damaging the thickness gauge 14.

[0013] Both protectors 1, 1 are mounted on stands 12, 1.
Since it is installed only near the pass line center between the three stands, it does not obstruct the operator's view between the stands.

[0014] If a misroll occurs, pins 5, 5
Remove the air cylinder 6 installed on the top of the housing.
By operating 6, both protectors 1, 1 connected by chains 7, 7 are raised to an open state, and the space necessary for misroll processing work can be quickly secured.

Therefore, according to this embodiment, all of the conditions (1) to (4) described above can be satisfied.

[0016]

[Effects of the Invention] As described above, according to the present invention, the following effects can be obtained. ■The space required for misroll processing work can be quickly and easily secured. ■The protector and stopper mechanism can reliably protect the thickness gauge from misrolling. ■Since it does not obstruct the operator's visual field of view of the strip between the stands, it is possible to manage the rolling status visually as before.

[Brief explanation of drawings]

FIG. 1 is a side view of a thickness gauge protection device according to an embodiment of the present invention.

FIG. 2 is a top view of the thickness gauge protection device shown in FIG. 1;

[Explanation of symbols]

1 Protector 2 Shaft 3 Stopper (stopper mechanism) 4 Bearing part 5 Pin (stopper mechanism) 6 Air cylinder (opening/closing mechanism) 10,11 Rolling mill stand 12,13 Housing 14 Thickness gauge

Claims (3)

[Claims] Claim 1: A protection device for a thickness gauge installed between rolling mill stands, in which a pair of protectors are opened and closed via shafts on bearings provided in a housing on both sides between the stands into which the thickness gauge is inserted. The tips of these protectors are provided with holes through which the X-rays from the thickness gauge pass, and an opening/closing mechanism is provided to open and close both protectors. A protection device for a thickness gauge between rolling mill stands, characterized in that a removable stopper mechanism is provided to prevent movement of the protector in the direction of the thickness gauge when the protector is moved in the direction of the thickness gauge. 2. The protection device for a thickness gauge between rolling mill stands according to claim 1, wherein the pair of protectors is located near a pass line center between the stands. protection device. 3. The rolling mill stand thickness gauge protection device according to claim 1, wherein the stopper mechanism includes a stopper portion provided on the shaft and a pin removably provided on the bearing portion, and the stopper mechanism includes a stopper portion provided on the shaft and a pin removably provided on the bearing portion. A protection device for a thickness gauge between rolling mill stands, characterized in that the stopper and the pin are tightly connected when a load is applied.