JP2005233915A - Rubber roll testing device, and rubber roll testing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rubber roll testing device and a rubber roll testing method capable of simulating a rubber separation phenomenon under a using condition of an actual rubber roll. <P>SOLUTION: In this rubber roll testing device, a mating member is formed into structure capable of contacting in a position of a contact part, at least either of the testing roll or the mating member is connected to a driving means, and the testing roll is brought into rolling contact with the mating member. In this rubber roll testing method using the rubber roll testing device, a material of the mating member is made same to a material contacting with testing rubber in an actual application, a contact part is imparted with prescribed contact face pressure, and the testing roll is repeatedly brought into contact with the mating member. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a rubber roll test apparatus and a rubber roll test method capable of testing rubber of a rubber roll used in contact with a strip-shaped material such as a metal strip or a plastic strip.

  Rubber rolls are used for transportation equipment and processing equipment for metal strips such as steel strips. In the cold rolling process or the surface treatment process, a side trimmer device that cuts the width end of the metal strip to a predetermined width is usually installed. A rubber roll lined with rubber is used as a plate pressing roll. ing.

  The use state of the rubber roll applied to the plate pressing roll of this side trimmer device will be described with reference to FIGS. For example, in the cold rolling process, the metal strip 1 pulled up from the pickling tank is guided to the entry side of the trimmer knife 2, and both ends of the plate width are trimmed by the trimmer knife 2 as shown in FIG. At that time, the plate pressing roll 3 shown in FIGS. 5 (a) and 5 (b) is made of metal so that the metal strip 1 does not float up and the surface of the metal strip is not rubbed or pressed. It has the role of holding down the central part of the belt and maintaining the trimming accuracy.

  In FIG.5 (b), the code | symbol 3a shows a rubber coating layer, and the rubber coating layer 3a is lined on the outer peripheral surface of a metal cylinder, for example, a steel cylinder. Reference numeral 3 b indicates an axis of the plate pressing roll 3. The plate pressing roll 3 is rotatably supported on one side of an arm member 31, and the other side of the arm member 31 is fixed to a rotating shaft, and the rotating shaft has a weight 33 on one side. The other side of the arm member 32 is fixed and pressed against the metal strip 1 with a predetermined pressing force. Reference numeral 34 indicates the center of the rotation axis. Reference numeral 35 denotes a receiving roll, and the receiving roll 35 is rotatably supported by a roll support member 36.

  Here, the plate pressing roll 3 is configured such that the metal band 1 is sandwiched between the receiving rolls 35 facing each other and the metal band 1 is driven to rotate as the metal band 1 moves in the arrow direction. The reason for this is to prevent the plate pressing roll 3 from slipping with respect to the metal strip 1 and to bring it into rolling contact. When slip occurs between the plate pressing roll 3 having the rubber coating layer 3a and the metal strip 1, the rubber is scraped off on the surface of the metal strip and may adhere to the surface of the metal strip and cause a serious defect. .

  Recently, in the cold rolling process, the operation rate of the pickling line has increased due to various measures to improve the operation rate, and when the continuous operation time of the side trimmer device becomes longer, the heat of the rubber of the plate presser roll itself is generated. The resulting rubber peeling accident sometimes occurred. When a rubber peeling accident occurs on the plate press roll of the side trimmer device, not only the yield of the metal strip is lowered, but also the entire pickling line is stopped, resulting in confusion in the metal strip manufacturing process. For this reason, when applied to a rubber roll of an actual machine, development of a rubber material that is unlikely to cause a rubber peeling accident has been strongly promoted. On the other hand, for rubber materials currently in use, there is a strong demand for knowing the continuous operation possible time until rubber peeling occurs when a plate pressing roll is used under various conditions.

  Conventionally, the following method has been adopted for such a demand.

  (1) Refer to the actual values when a rubber roll accident occurred on an actual machine.

  (2) The rubber peeling phenomenon of the rubber roll is simulated by numerical calculation.

Japanese Patent Laid-Open No. 2002-243628 discloses a rubber roll deterioration determination test apparatus as shown in FIG. This rubber roll deterioration determination test apparatus sandwiches a steel plate 102 cut into a strip shape between sample plates 101a and 101b made of polyurethane rubber, applies a load from the directions indicated by arrows 104 and 105, makes the contact surface pressure appropriate, and makes the steel plate 102 This is a test apparatus for examining the deposits adhering to the steel sheet surface after pulling out in the direction indicated by arrow 103.
JP 2002-243628 A

  However, in the above (1), the number of times that a rubber peeling accident occurs in the actual rubber roll is small, and the operating conditions of the actual rubber roll are limited, so that the rubber roll peels off under various conditions. It is difficult to accurately predict the continuous operation time until. Also, newly developed rubber materials usually do not have a track record of being applied as rubber rolls in such real machines.

  In the above (2), the rubber peeling phenomenon of the rubber roll is mainly caused by the fact that the rubber itself generates heat as it rolls and contacts the contact surface pressure (hereinafter referred to as internal frictional heat generation of the rubber). Therefore, the amount of heat dissipated into the atmosphere due to the rotation of the rubber roll and the amount of contact heat transferred to the metal belt in contact with the rubber roll can be determined to some extent by preliminary experiments. Even if it is possible, there is little accurate data on the internal frictional heat value of rubber and the physical properties of rubber, so numerical calculation can simulate the continuous operation time from the start of rolling contact until the rubber partially melts. Difficult to do.

  In addition, since the internal frictional heat generation amount of rubber and the physical property value of rubber differ depending on the rubber material, it is common that the value of a newly developed rubber material is not accurately known. Therefore, it is difficult to accurately simulate the continuous operation time from the rolling contact start time to the time when the rubber is partially melted by numerical calculation for a rubber roll using a newly developed rubber material.

  In addition, it has been difficult for the rubber roll deterioration determination test apparatus to reproduce the rubber peeling phenomenon caused by the internal frictional heat generation of the rubber that occurs when the rubber roll is in rolling contact with the contact surface pressure.

  An object of the present invention is to provide a rubber roll test apparatus and a rubber roll test method capable of solving the above-described problems of the prior art and simulating a rubber peeling phenomenon in an actual use state of a rubber roll.

  The rubber roll test apparatus of the present invention includes a test roll that is rotatably supported, a mating member that contacts the test roll at a contact portion, a driving unit that repeatedly contacts the test roll at a contact portion, and a predetermined contact at the contact portion. The test roll is a rubber roll having a test rubber as a surface layer, and the mating member can be contacted at the position of the contact portion. At least one of the roll and the mating member is connected to the driving means, and the test roll is configured to be in rolling contact with the mating member. It is preferable that a temperature detecting means for detecting the temperature of the test rubber is provided on the test roll.

  The rubber roll test method of the present invention includes a test roll that is rotatably supported, a mating member that contacts the test roll at a contact portion, a driving means that repeatedly contacts the contact portion at the contact portion, and the contact portion. A pressing means for generating a predetermined contact surface pressure, the test roll is a rubber roll having a test rubber on a surface layer, and the mating member is configured to be contactable at the position of the contact portion, At least one of the test roll and the mating member is connected to the driving means, and a rubber roll testing device is used so that the test roll is in rolling contact with the mating member. The test rubber is the same as the material that is contacted when applied to an actual machine, and a predetermined contact surface pressure is applied to the contact portion, and the test roll and the counterpart portion And performing a test for repeated contact with. At that time, it is preferable to measure the temperature of the test rubber of the test roll during the test.

  According to the present invention, the contact surface pressure can be set to a value equivalent to that of the actual machine, and when the rubber for testing is applied to the rubber roll of the actual machine, the rubber generated as the rubber roll is brought into rolling contact while receiving the contact surface pressure. It is possible to simulate the rubber peeling phenomenon caused by the internal frictional heat generation.

An apparatus according to an embodiment of the present invention will be described with reference to FIGS.
As shown in FIGS. 1A and 1B, the rubber roll test apparatus according to the embodiment of the present invention includes a test roll 4, a counter roll 5 that contacts the test roll 4 at a contact portion P, a test roll 4, It has a motor 7 as a driving means for repeatedly contacting the counterpart roll 5 at the contact portion P and an air cylinder 6 as a pressing means for generating a predetermined contact surface pressure at the contact portion P.

  The pair of test rolls 4 and the counterpart roll 5 that are in contact with each other at the contact portion P are supported rotatably. Further, the counterpart roll 5 is connected to the motor 7 via the roll shaft 11.

In the rubber roll testing apparatus according to this embodiment, air is guided from an air source (not shown) into the air cylinder 6 and the contact surface pressure at the contact portion P is applied to, for example, the actual plate pressing roll 3 (see FIG. 5). It can be the same as the surface pressure equivalent. Further, the rotational speed of the counterpart roll 5 can be rotated so that the rotational speed of the test roll 4 is 60 to 600 rpm according to the diameter d ₄ of the test roll 4 / the diameter of the counterpart roll 5.

  By the way, the contact part P of Fig.1 (a), (b) is the rubber | gum of the test roll 4, when the material of the other party roll 5 is made into the same steel as the metal plate 1 which the plate press roll 3 contacts, for example. As shown in FIG. 1C, the coating layer 4a is elastically deformed along the peripheral surface of the mating roll 5 due to rubber elasticity. As described above, when the rubber roll test is performed using the rubber roll test apparatus according to the embodiment, the rubber roll 4 is pressed against the surface of the mating roll 5 by the air cylinder 6.

  Further, in the rubber roll test apparatus described above, the pair of test rolls 4 and the counterpart roll 5 are rotatably supported, and the counterpart roll 5 is connected to the motor 7 via the roll shaft 11. , The test roll 4 is configured to be in rolling contact with the counterpart roll 5. Here, in the case of the rubber roll applied to the actual machine as the plate pressing roll 3 (see FIG. 5), the metal roll 1 is in rolling contact with the movement of the metal band 1, so this state is the rubber roll test described above. The device reproduces well.

  As the test rubber, a rubber material already used for a rubber roll of an actual machine may be used, or a newly developed rubber material may be used. In short, the rubber material to be applied to the rubber roll of the actual machine is appropriately cut to obtain a test rubber. The test rubber can be lined on, for example, a steel roll surface to form the rubber coating layer 4a of the test roll 4.

  Therefore, using the rubber roll testing apparatus according to the above-described embodiment, the material of the counterpart roll 5 is the same as the material that contacts when the test rubber is applied to the actual machine, and a predetermined contact surface pressure is applied to the contact portion P. Thus, a test in which the test roll 4 and the counterpart roll 5 are repeatedly contacted can be performed. By performing the rubber roll test in this way, it is possible to reproduce the rubber peeling phenomenon caused by the internal frictional heat generation of the rubber that occurs when the rubber roll comes into rolling contact with the test roll 4 while receiving the contact surface pressure. At that time, the contact surface pressure between the test roll 4 and the counterpart roll 5 is appropriately set. However, in the rubber roll testing apparatus according to the above-described embodiment, the material of the surface layer of the mating roll 5 is not limited to steel, and can be the same material as the mating material with which the actual rubber roll contacts.

  Here, the test roll 4 of the rubber roll test apparatus described above is preferably provided with a temperature detecting means for detecting the temperature of the test rubber. For example, as shown in FIG. 2, a thermocouple 8 serving as a temperature detecting means is inserted into an axial hole formed in the roll rotation shaft 10 of the test roll 4, and a cylinder integrated with the roll rotation shaft 10. The thermocouple 8 is provided so that one end of the thermocouple 8 is in point contact with the rubber coating layer 4a at a point Q after passing through the radial hole of the member. The other end of the thermocouple 8 is connected to the data log 9. The data log 9 is attached to the roll rotating shaft 10 of the test roll 4 as shown in FIGS. For this reason, during the rubber roll test, when the temperature of the test rubber is transmitted from the rotary shaft 10 to a temperature recorder such as a computer, it is not necessary to wire a temperature compensation line for sending temperature data between the rotary shaft 10 and the computer. Further, it is not necessary to detect a minute change in electromotive voltage via a contact surface by a slip ring or the like. Therefore, it is preferable because the change with time of the rubber temperature during the test can be accurately obtained from the time when the rolling contact of the test roll 4 starts until the time when the rubber coating layer 4a is partially melted.

By the way, the rubber roll testing device should be a device that is more compact than the actual equipment, and well reproduces the rubber peeling phenomenon caused by the internal frictional heat generation of the rubber that occurs when the rubber roll of the actual equipment is in contact with the rolling contact surface pressure. The diameter d ₃ of the actual roll / the diameter d ₄ of the test roll 4 is in the range of 1 to 7.5, and the contact width in the roll axis direction of the test roll 4 is 60 to 150 mm. be able to. The rubber coating thickness t ₃ of the actual rubber roll / the rubber coating thickness t ₄ of the test roll can be set to 0.5 to 2.

  Here, in the rubber roll testing apparatus according to the above-described embodiment, the counterpart member has been described as the counterpart roll. However, the present invention is not limited to this, and the end belt supported by the counterpart roll 201 as shown in FIG. A rubber roll test apparatus having 200 is also possible. The end belt 200 is pulled and moved in the direction of an arrow 203 by a belt driving roller connected to a motor or the like (not shown), and the moving direction is changed to a direction indicated by an arrow 204 by the belt driving roller or another direction changing roller. After that, it passes under the roll support member 202 that rotatably supports the receiving roll 201 and is returned to the upper side of the receiving roll 201 by a direction changing roller (not shown).

  In FIG. 7, reference numeral 205 indicated by a two-dot chain line indicates an arrangement position of the test roll 4 and the air cylinder 6 (pressing means).

  However, as shown in FIG. 1 and FIG. 2, the rubber roll test apparatus using the mating member as the mating roll 5 is simpler than the rubber roll testing apparatus using the mating member and the end belt 200 supported by the roll 201. It can be a structure.

A rubber peeling test was performed using the rubber roll test apparatus shown in FIGS. In this test, for two types of rubber materials used in actual rubber rolls, the line pressures obtained by field surveys and calculations are two levels of 1000 N / cm (102 kgf / cm) and 804 N / cm (82 kgf / cm). Changed and carried out. A test rubber lining on the roll surface was cut out from a rubber material having a thickness of 35 mm, and the test rubber was lined on the roll surface to obtain a test roll. The diameter _{d 4} of the test roll (rubber roll) is 200 mm, the axial length is 60 mm, mating roll is made of steel, and its diameter 200 mm, and 150mm its axial length. The test roll and the mating roll were brought into contact, and the mating roll was driven by a motor at a rotational speed of 477 rpm.

  Under each test condition, a change in the rubber temperature of the test roll was detected by the thermocouple 8 during the test. The results are shown in FIG.

  The solid line indicates the case of ether-based polyurethane rubber, and the broken line indicates the case of ester-based polyurethane rubber. From the results shown in FIG. 3, it can be seen that, regardless of which rubber material is used, the rubber peeling phenomenon can be simulated by increasing the linear pressure in the rubber roll test apparatus. In addition, ether-based polyurethane rubber materials were less likely to raise the rubber temperature than ester-based polyurethane rubber materials, and the results showed that they were more suitable as rubber materials for use in rubber rolls, as with actual equipment.

  From this, when applying the developed rubber material to the actual machine, using the rubber roll test apparatus described above, the test roll and the mating roll are brought into contact, the contact surface pressure is set to a value equivalent to the actual machine, and the test is performed. After that, using the newly measured rubber temperature rise value of the newly developed rubber material, enter the data such as the diameter of the actual rubber roll, the rubber coating thickness of the actual rubber roll, the thermal conductivity, etc. By the calculation, it is possible to accurately simulate the rubber peeling phenomenon in the actual rubber roll. Therefore, it is possible to accurately obtain the continuous operation possible time when the newly developed rubber material is applied to the actual rubber roll.

BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic which shows the rubber roll testing apparatus of one Example of this invention, (a) is a front view, (b) is a side view, (c) is a detailed drawing of the contact part P. It is the schematic which shows the inside of the rubber roll test apparatus shown in FIG. 1, (a) is a longitudinal cross-sectional view which passes along the rotating shaft center of the test roll 4, (b) is a longitudinal cross section orthogonal to the rotating shaft of the test roll 4. FIG. It is a graph which shows the test result at the time of using the rubber roll test apparatus of one Example of this invention shown to FIG. It is a schematic plan view of a side trimmer device. (A) is a schematic arrangement drawing of the rubber roll applied to the side trimmer device as the plate pressing roll 3, and (b) is a schematic configuration diagram of the plate pressing roll 3. It is a schematic block diagram of the rubber roll degradation determination test apparatus disclosed by Unexamined-Japanese-Patent No. 2002-243628. It is explanatory drawing of the rubber roll test apparatus based on this invention which made the other party member the end belt 200 supported by the roll 201. FIG.

Explanation of symbols

1 Metal band 2 Trimmer knife 3 Plate presser roll (rubber roll)
3a rubber coating layer 3b roll axis d _{3, d 4} diameter
t _{3, t 4} rubber coating thickness 35 receiving roll 4 test roll (rubber roll)
4a Rubber coating layer 5 Counter roll (mating member)
6 Air cylinder (pressing means)
7 Motor (drive means)
8 Thermocouple (Temperature detection means)
9 Data log 10, 11 Roll shaft 31, 32 Arm member 33 Weight 34 Center of rotation shaft 35 Receiving roll 36 Roll supporting member 201 Receiving roll 200 Endless belt 202 Roll supporting member 203, 204 Moving direction of endless belt 200 205 Test roll 4 and position of air cylinder 6

Claims (4)

A test roll that is rotatably supported, a mating member that comes into contact with the test roll at a contact portion, a driving unit that repeatedly contacts the test roll at the contact portion, and a pressing force that generates a predetermined contact surface pressure at the contact portion Having means,
The test roll is a rubber roll having a test rubber as a surface layer, and the mating member is structured to be contactable at the position of the contact portion, and at least one of the test roll and the mating member serves as the driving means. A rubber roll test apparatus, wherein the test apparatus is connected so that the test roll is in rolling contact with the mating member.   2. The rubber roll testing apparatus according to claim 1, wherein the test roll is provided with temperature detecting means for detecting the temperature of the test rubber. A test roll that is rotatably supported, a mating member that comes into contact with the test roll at a contact portion, a driving unit that repeatedly contacts the test roll at the contact portion, and a pressing force that generates a predetermined contact surface pressure at the contact portion Having means,
The test roll is a rubber roll having a test rubber as a surface layer, and the mating member is structured to be contactable at the position of the contact portion, and at least one of the test roll and the mating member serves as the driving means. Using a rubber roll testing device that is connected and configured so that the test roll is in rolling contact with the mating member,
A test in which the material of the mating member is the same as the material to be contacted when the test rubber is applied to an actual machine, a predetermined contact surface pressure is applied to the contact portion, and the test roll and the mating member are repeatedly contacted. A rubber roll test method characterized by:   The rubber roll test method according to claim 3, wherein the temperature measurement of the test rubber of the test roll is performed during the test.

Images