JPH0666801U - Testing rolling mill - Google Patents

Abstract

(57) [Summary] [Objective] To provide a test rolling mill used for investigating the deformation behavior of rolled material in the roll bite region in hot rolling or cold rolling. In a rolling mill for testing, which comprises a pair of upper and lower horizontal rolls 3 and 4 for rolling a plasticine test material 1, the horizontal roll 3 is made of a transparent acrylic resin material and has a hollow cylindrical shape. By arranging the image pickup device 8 directly above the roll, it is possible to directly and continuously observe the deformation behavior of the test material 1 in the roll bite area A.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention mainly relates to a test rolling mill used for investigating the deformation behavior of a rolled material in a roll bite region in hot rolling or cold rolling.

[0002]

[Prior art]

 Conventionally, as one of the methods for investigating the deformation behavior of rolled material in hot rolling or cold rolling, a slab-shaped test material made of clay typified by plasticine (for example, the thickness is 10 mm and the width is 10 mm). The method of trial rolling 100 mm) with a metal roll is widely used. Since this method rolls clay with low deformation resistance, it has the advantages that it requires only low strength of the rolling machine and low output of the drive motor, and that it can be used for low-cost experiments.

[0003]

[Problems to be solved by the device]

 However, in order to know the deformed state of the rolled material in the roll bite area in the above-mentioned conventional method, a process called so-called bite stopping work in which the roll being rolled is stopped and the rolled material is taken out in the same manner as in ordinary rolling. Is indispensable, and there is a problem that the rolling test is inefficient and inaccurate. In addition, this bite prevention work has a drawback that the rolled material is slightly deformed.

Further, in order to know what kind of deformation process in the roll bite region the deformation of a particular portion of the rolled material follows with rolling, a large number of test materials of the same shape are prepared, There is also a problem that the test cost is high because it is necessary to carry out anti-bite rolling work at many positions. It is an object of the present invention to provide a test rolling mill that solves the above-mentioned problems of the prior art.

[0005]

Means for Solving the Problems The present invention relates to a rolling mill for testing, which comprises a pair of upper and lower horizontal rolls and / or a pair of left and right vertical rolls, for testing, wherein the horizontal rolls and / or the vertical rolls are provided. At least one of the rolling rolls is made of a transparent material and has a shape of a hollow cylinder, and an image pickup device is provided in the vicinity of the transparent hollow cylindrical roll for photographing the roll bite area of the test material. This is a test rolling mill.

The image pickup device may be arranged inside the transparent hollow cylindrical roll.

[0007]

[Work]

 According to the present invention, since at least one of the rolling rolls of the test rolling mill is a transparent hollow cylindrical roll, the deformation behavior of the test material in the roll bite region is directly measured by using the imaging device. And it can be observed continuously. If the image pickup device is arranged inside the transparent hollow cylindrical roll, it is possible to obtain an image with less distortion.

[0008]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. [Embodiment 1] FIG. 1 is a front view showing a first embodiment in which the present invention is applied to a test rolling mill having a pair of upper and lower horizontal rolls. In the figure, 1 is a plastic test material, 2 is a housing, 3 is a hollow cylindrical transparent upper horizontal roll made of acrylic resin, 4 is a lower horizontal roll made of metal, 5 is a drive motor, and 6 is roll drive transmission. The mechanism 7 is a roll reduction device. Further, 8 is a CCD camera mounted directly above the upper horizontal roll 3, 9 is a VTR for recording the photographed image, and 10 is an image processing device for processing the image.

With this configuration, while the test material 1 is being rolled, it is rolled by the upper horizontal roll 3 as shown in FIG. 2 through the transparent upper horizontal roll 3 using the CCD camera 8. It is possible to directly and continuously observe the deformation behavior of the upper surface of the test material 1 in the region A. In this case, the photographed image is slightly distorted by the curvature surface of the upper roll 3. Therefore, a grid system whose positional relationship in space is known in advance is placed in the roll bite area for shooting, and the image is captured as a reference image in the image processing apparatus 10, and this reference image and the image obtained during rolling are used. By using a normal correction method that compares and corrects, it is possible to easily reduce the influence of distortion.

Example 2 FIG. 3 is a front view showing a second example in which the present invention is applied to a test rolling mill having a pair of left and right vertical rolls. In this figure, 11 is a hollow cylindrical left vertical roll made of acrylic resin, 12 is a right vertical roll made of metal, and the CCD camera 8 is mounted in the immediate vicinity of the side of the left vertical roll 11. As a result, during the rolling of the test material 1, as shown in FIG. 4, by the CCD camera 8 through the transparent left vertical roll 11, the area B on the side surface of the test material 1 which is roll-bited by the left vertical roll 11 is shown. The deformation behavior of the can be observed directly and continuously.

[Embodiment 3] FIG. 5 is a front view showing a third embodiment in which the present invention is applied to a universal type test rolling mill having a pair of upper and lower horizontal rolls and a pair of left and right vertical rolls. Is. As shown in the figure, hollow cylindrical acrylic resin rolls are used for the upper horizontal roll 3 and the left vertical roll 11, and the CCD camera 8 is provided directly above the upper horizontal roll 3 and near the side of the left vertical roll 11, respectively. Install.

As a result, the rolling deformation state of the roll bite area on the surface of the test material 1 horizontally rolled by the upper horizontal roll 3 and the deformation behavior of the roll bite area on the side surface of the test material 1 vertically rolled by the left vertical roll 11 are shown. Can be observed simultaneously and directly. In each of the above-described embodiments, the CCD camera 8 is described as being mounted on the outside of the transparent hollow cylindrical roll, but as shown in FIG. 6, the transparent hollow cylindrical upper horizontal roll 3 (or left vertical roll) is used. If the CCD camera 8 is attached inside 11), it is possible to obtain an image with less distortion.

In each of the above embodiments, one of the pair of upper, lower, left and right rolling rolls is described as using a hollow cylindrical transparent roll made of acrylic resin, but the remaining roll materials are similarly hollow cylindrical. Needless to say, the deformation behavior of the roll bite regions on the upper and lower surfaces of the test material or on the left and right side surfaces of the test material can be observed at the same time if it is made of acrylic resin.

[0014]

[Effect of device]

 According to the present invention, since at least one of the rolling rolls of the test rolling mill is a transparent hollow cylindrical roll, the deformation behavior of the test material in the roll bite region is directly measured by using the imaging device. In addition, continuous observation is possible, which enables rolling tests to be performed efficiently and accurately.

[Brief description of drawings]

FIG. 1 is a front view showing a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line XX of FIG.

FIG. 3 is a front view showing a second embodiment of the present invention.

FIG. 4 is a plan view of FIG.

FIG. 5 is a front view showing a third embodiment of the present invention.

FIG. 6 is a side sectional view showing another embodiment relating to the arrangement position of the CCD camera.

[Explanation of symbols]

 1 Test Material 2 Housing 3 Upper Horizontal Roll 4 Lower Horizontal Roll 8 CCD Camera (Imaging Device) 9 VTR 10 Image Processing Device 11 Left Vertical Roll 12 Right Vertical Roll

Claims (2)

[Scope of utility model registration request] 1. A rolling mill for testing, comprising a pair of upper and lower horizontal rolls and / or a pair of left and right vertical rolls for rolling a test material, wherein at least one of the horizontal rolls and / or the vertical rolls is transparent. A rolling mill for testing, which is made of a material and has a shape of a hollow cylinder, and is provided with an image pickup device for taking an image of a roll bite region of the test material in the immediate vicinity of the transparent hollow cylindrical roll. 2. The test rolling mill according to claim 1, wherein the image pickup device is arranged inside the transparent hollow cylindrical roll.