Steel strip oil film thickness measuring device and method

Abstract

The application discloses a steel belt oil film thickness measuring device, relates to the lubricating technical field of continuous flat pressing machine equipment, and comprises a main shell, a contact assembly is arranged on the main shell, a plurality of oil absorption layers can be installed on the contact assembly, when the oil absorption layers are in contact with a steel belt, steel belt oil on the steel belt can penetrate into the oil absorption layers, a pressure measuring device is further installed on the main shell, the pressure measuring device is connected with the contact assembly, and the contact pressure of the contact assembly and the steel belt can be measured, the pressure measuring device is connected with a controller, the controller is further connected with a timing module, and the contact time of the contact assembly and the steel belt can be recorded. The application further provides a steel belt oil film thickness measuring method using the above steel belt oil film thickness measuring device. The application can measure the oil film layer number of the penetrated oil absorption layer in unit pressure and unit time, and provide a reference for on-site technical personnel to regulate and control the oil injection amount.

Description

Technical Field

[0001] This invention relates to the field of lubrication technology for continuous flat press equipment, and in particular to a device and method for measuring the thickness of oil film on steel strips. Background Technology

[0002] Continuous flatbed presses have enabled the industrial production of engineered wood panels, rapidly increasing output and production efficiency. As crucial production equipment, its key operating components, the rollers and steel strip, operate under harsh conditions of high temperature and high load. At the slab inlet, steel strip oil adheres to the roller surface through dripping. Then, as the rollers contact the steel strip, the oil transfers to the steel strip surface, providing lubrication and protection. Insufficient lubricating oil on the steel strip surface can easily reduce the oil film thickness, causing damage to the steel strip.

[0003] During normal production, it is impossible to accurately determine the condition of the oil film on the steel strip surface by visual inspection alone. Currently, the common method is to press and wipe the steel strip with a paper towel to determine the condition of the oil film. However, the method of pressing and wiping with a paper towel can cause a large error due to the different pressure and distance. Moreover, in actual production, the speed of the press varies from 10m / min to 180m / min, and the faster the speed, the greater the error in judging the oil film.

[0004] Therefore, there is an urgent need to provide a device and method for measuring the thickness of oil film on steel strips to solve the above-mentioned problems existing in the prior art. Summary of the Invention

[0005] The purpose of this invention is to provide a steel strip oil film thickness measuring device and method to solve the problems existing in the prior art. It can measure the number of oil film layers in the permeable oil absorption layer per unit pressure and per unit time, providing a reference for on-site technicians to control the amount of oil injected.

[0006] To achieve the above objectives, the present invention provides the following solution:

[0007] This invention provides a steel strip oil film thickness measuring device, comprising a main housing, on which a contact assembly is provided, and multiple oil-absorbing layers can be installed. When the oil-absorbing layers contact the steel strip, the steel strip oil on the steel strip can penetrate into the oil-absorbing layers. A pressure measuring device is also installed on the main housing, and the pressure measuring device is connected to the contact assembly to measure the contact pressure between the contact assembly and the steel strip. The pressure measuring device is connected to a controller, and the controller is also connected to a timing module to record the contact time between the contact assembly and the steel strip.

[0008] Preferably, the contact assembly includes a slider, and the oil-absorbing layer can be installed on the contact surface of the slider, wherein the contact surface is the surface where the slider contacts the steel strip; a cover is also installed on the slider, and the cover is provided with a buckle, the cover is installed on the contact surface by the buckle, and can fix the oil-absorbing layer; the cover is provided with an opening so that the oil-absorbing layer can contact the steel strip oil on the steel strip.

[0009] Preferably, a buffer layer is also installed on the contact surface of the slider, and when the oil-absorbing layer is installed on the slider, the buffer layer is located between the oil-absorbing layer and the slider.

[0010] Preferably, the front end of the main housing is further provided with a mounting cavity, the front end of the mounting cavity is provided with an opening, the front side of the slider is provided with the contact surface, the rear side of the slider is provided with a sliding part, the sliding part is installed at the opening of the mounting cavity and can slide in the mounting cavity in a direction perpendicular to the contact surface; the pressure measuring device is installed at the rear end of the mounting cavity, and the pressure measuring device is connected to the rear side of the slider through an elastic element.

[0011] Preferably, the pressure measuring device is a pressure sensor, and the elastic element is a spring.

[0012] Preferably, a handle is provided at the rear end of the main housing.

[0013] Preferably, a power supply compartment is provided inside the grip, and the power supply for the steel strip oil film thickness measuring device is installed inside the power supply compartment. A power switch is also installed on the grip, and the power switch is connected to the power supply.

[0014] Preferably, the controller is also connected to a display screen, which can display the contact time and maximum contact pressure during the contact period between the contact component and the steel strip, and the display screen is mounted on the grip.

[0015] Preferably, the controller is also connected to a pressure-time zeroing button, which is installed on the grip and can reset the contact time and maximum contact pressure displayed on the display screen during the contact period between the contact component and the steel strip.

[0016] Preferably, both the main housing and the contact assembly are made of polytetrafluoroethylene.

[0017] The present invention also provides a method for measuring the thickness of an oil film on a steel strip, using the above-mentioned device for measuring the thickness of an oil film on a steel strip, comprising the following steps:

[0018] S1. Install multiple layers of the oil-absorbing layer on the contact assembly;

[0019] S2. Press the contact component against the direction of the steel belt's movement to the surface of the steel belt, so that the oil-absorbing layer comes into contact with the steel belt oil, and record the contact time and maximum contact pressure during the contact period between the contact component and the steel belt.

[0020] S3. Observe the number of layers of oil penetration into the oil-absorbing layer on the steel strip;

[0021] S4. Calculate the number of oil film layers that permeate the oil-absorbing layer per unit pressure and per unit time, and adjust the oil injection amount according to the number of oil film layers.

[0022] The present invention achieves the following beneficial technical effects compared to the prior art:

[0023] This invention achieves contact between the oil-absorbing layer and the steel strip through a contact component, and monitors the contact pressure and contact time through a pressure measuring device. It can measure the number of oil film layers penetrating the oil-absorbing layer per unit pressure and per unit time, and determine whether the oil film thickness is appropriate based on the number of oil film layers, providing a reference for on-site technicians to adjust the amount of oil injected. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the steel strip oil film thickness measuring device of the present invention;

[0026] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0027] The components are as follows: 1. Main housing; 2. Power supply compartment; 3. Handle; 4. Power switch; 5. Pressure time zeroing button; 6. Display screen; 7. Controller; 8. Pressure sensor; 9. Spring; 10. Slider; 11. Gap; 12. Cover; 13. Buckle; 14. Rubber pad. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] The purpose of this invention is to provide a steel strip oil film thickness measuring device and method to solve the problems existing in the prior art. It can measure the number of oil film layers in the permeable oil absorption layer per unit pressure and unit time, providing a reference for field technicians to control the amount of oil injected.

[0030] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] like Figures 1-2 As shown, this embodiment provides a steel strip oil film thickness measuring device, mainly including a main housing 1. A contact component is provided on the main housing 1, and multiple oil-absorbing layers can be installed on the contact component. When the oil-absorbing layer contacts the steel strip, the steel strip oil on the steel strip can penetrate into the oil-absorbing layer. A pressure measuring device is also installed on the main housing 1. The pressure measuring device is connected to the contact component and can measure the contact pressure between the contact component and the steel strip. The pressure measuring device is connected to a controller 7, which can transmit the contact pressure to the controller 7. The controller 7 is also connected to a timing module, which can start recording time when a pressure signal is received and stop recording time when the pressure signal disappears, thereby obtaining the contact time between the contact component and the steel strip.

[0032] In this embodiment, the contact assembly includes a slider 10, and the oil-absorbing layer can be installed on the contact surface of the slider 10, wherein the contact surface is the surface where the slider 10 contacts the steel strip; a cover 12 is also installed on the slider 10, and a buckle 13 is provided on the cover 12. The cover 12 is installed on the contact surface through the buckle 13 and can fix the oil-absorbing layer. There is a gap 11 with a width of 0.1 mm from front to back between the slider 10 and the cover 12 for installing the oil-absorbing layer; the cover 12 is provided with an opening so that the oil-absorbing layer can contact the steel strip oil on the steel strip.

[0033] In this embodiment, a buffer layer is also installed on the contact surface of the slider 10, wherein the buffer layer is preferably a rubber pad 14; the oil-absorbing layer is fixed on the rubber pad 14 by the cover 12 with buckle 13 to prevent the oil-absorbing layer from falling off, thereby preventing the oil-absorbing layer from being rolled into the continuous flat press equipment, and the oil-absorbing layer comes into contact with the steel belt under pressure, while the rubber pad 14 has a certain buffering effect, which can prevent the oil-absorbing layer from making hard contact with the steel belt.

[0034] In this embodiment, the oil-absorbing layer is preferably a paper towel, or other oil-absorbing layers, such as a cloth oil-absorbing layer, can be selected according to work needs.

[0035] In this embodiment, the front end of the main housing 1 is further provided with a mounting cavity, the front end of the mounting cavity is provided with an opening, the front side of the slider 10 is provided with the contact surface, the rear side of the slider 10 is provided with a sliding part, the sliding part is installed at the opening of the mounting cavity, and can slide in the mounting cavity in a direction perpendicular to the contact surface. The distance between the front end of the slider 10 and the main housing 1 can control the maximum pressing pressure. The pressure measuring device is installed at the rear end of the mounting cavity, and the pressure measuring device is connected to the rear side of the slider 10 through an elastic element.

[0036] It should be noted that in this embodiment, the left side facing the paper is the front side, and the right side is the back side.

[0037] In this embodiment, the pressure measuring device is a pressure sensor 8, and the elastic element is a spring 9; alternatively, other pressure measuring devices and elastic elements may be selected according to work requirements.

[0038] In this embodiment, a handle 3 is provided at the rear end of the main housing 1, and a power supply compartment 2 is provided at the bottom of the handle 3. The power supply for the steel strip oil film thickness measuring device is installed in the power supply compartment 2, which can provide power to the entire measuring device. A power switch 4 is also installed on the handle 3, and the power switch 4 is connected to the power supply. The power supply for the steel strip oil film thickness measuring device can be an external power source or a battery-powered device; in this embodiment, battery power is preferred.

[0039] In this embodiment, the controller 7 is also connected to a display screen 6, which can display the contact time and maximum contact pressure during the contact period between the contact component and the steel strip. The display screen 6 is mounted on the grip 3.

[0040] In this embodiment, the controller 7 is also connected to a pressure-time zeroing button 5, which is installed on the grip 3 and can reset the contact time and maximum contact pressure displayed on the display screen 6 to zero.

[0041] In this embodiment, the display screen 6 is embedded inside the main housing 1, and the power switch 4 and the pressure time zeroing button 5 are located below the display screen 6, also embedded inside the main housing 1.

[0042] In this embodiment, the main housing 1 and the slider 10 and cover 12 of the contact assembly are all made of polytetrafluoroethylene (PTFE). In actual operation, due to the angle, the cover 12 containing the buckle 13 will inevitably come into contact with the steel strip. However, since it is made of PTFE, it has good self-lubricating properties and will not cause scratches to the steel strip. At the same time, the slider 10 is made of PTFE. When the slider 10 is pressed and moves into the main housing 1, it can reduce the frictional resistance between it and the main housing 1.

[0043] This embodiment also provides a method for measuring the thickness of oil film on steel strips, using the aforementioned steel strip oil film thickness measuring device, and includes the following steps:

[0044] 1. Open the cover 12 containing the buckle 13, place a piece of tissue paper (19cm×21cm, 3 layers; folded horizontally twice and vertically once, the size is 6.33cm×10.5cm) on the surface of the rubber pad 14, and then fasten the cover 12.

[0045] 2. Turn on the power switch 4, hold the handle of the steel strip oil film thickness measuring device in the opposite direction to the running direction of the steel strip, and try to keep the handkerchief paper parallel to the surface of the steel strip. Then press it on the surface of the running steel strip for about 3 seconds (the specific time can be adjusted according to on-site experience). During this process, the display screen 6 will record the contact time and the maximum contact pressure within the contact time period. Then remove the steel strip oil film thickness measuring device.

[0046] 3. Open the cover 12 containing the buckle 13, take out the handkerchief paper and unfold it, observe the number of oil film layers that the steel strip oil penetrates on the handkerchief paper (marked as N), and then divide it by the maximum pressure (marked as P) and the recorded time (marked as T) to obtain the number of oil film layers that penetrate the handkerchief paper per unit pressure per unit time = N / (P×T).

[0047] 4. After the single oil film test estimation is completed, press the pressure and time zero button 5 to clear the maximum contact pressure and contact time obtained in the last operation, and then perform the next operation. You can repeat the test or test the oil film condition at other locations.

[0048] 5. After the oil film test estimation is completed, turn off the power and remove the handkerchief paper.

[0049] In this embodiment, step 3 can also establish a relationship between the number of penetrating oil film layers and the actual amount of oil sprayed, the production process of the board, etc.

[0050] Specifically, the more layers of oil film that penetrate, the greater the amount of oil on the steel strip surface and the thicker the oil film. Generally, the number of oil film layers that penetrate is at least 3. The appropriateness of the oil film thickness can be determined based on the number of oil film layers, and the oil film thickness can be controlled by adjusting the amount of oil injected. The actual amount of oil injected is controlled by the oil pump, which is generally controlled by adjusting the Hertz number (Hz, i.e., the frequency of the oil pump). The relationship between the number of oil film layers that penetrate and the amount of oil injected can be obtained through multiple experiments.

[0051] The specific experiment is as follows:

[0052] This embodiment takes a medium-density fiberboard production line with a width of 4 feet as an example. The thickness of the sheet produced is 18 mm, and the press speed is 28 m / min. Multiple statistical experiments were conducted. The oil-absorbing layer used in the statistical experiments was the same as that used in the actual tests. However, the pressure and test time in the statistical process were not exactly the same. Finally, the number of oil film layers that permeated within a unit time and unit pressure was calculated using the formula: Number of oil film layers = N / (P×T). The partially measured number of permeated oil film layers and the Hertz number of the oil pump injection are listed in Table 1.

[0053] Table 1 Data on the number of permeable oil film layers and the injection frequency of the oil pump.

[0054]

[0055] Table 1 shows that as the oil pump's injection Hertz frequency increases from 4Hz to 18Hz, the number of permeable oil film layers gradually increases from 2 to 8. This indicates that an increase in the Hertz frequency, i.e., an increase in the injection volume, leads to an increase in the number of permeable oil film layers, and there is a positive correlation between the Hertz frequency of the oil pump's injection volume and the number of permeable oil film layers. It should be noted that within a certain range of the Hertz frequency, the change in the number of permeable oil film layers may not be significant; a significant increase in the Hertz frequency will cause a change in the number of permeable oil film layers. To ensure a normal supply of lubricating oil and a sufficient lubricating oil film, the number of permeable oil film layers per unit time and unit pressure should be at least 3. Under this production line and this production process, at least 6Hz of oil injection is required. The specific injection volume should be set according to the operational needs, ensuring sufficient injection volume while preventing excessive injection and waste.

[0056] As for the process of producing boards, the types of boards are divided into MDF, MDF, particleboard, oriented strand board, etc. The highest temperature can reach 240℃, and the lowest is around 180℃. The relationship between the process of producing boards and the number of oil film layers can also be obtained through multiple similar experiments; thus, the process of producing boards can be controlled according to the number of oil film layers.

[0057] In this embodiment, the number of layers of paper towels that penetrate the steel strip oil will vary depending on the type of paper towel. Therefore, it is necessary to fix the type of paper towel. Generally, the best choice is Xinxiangyin handkerchief paper (19cm×21cm, 3 layers, single layer thickness of 0.01mm). In addition, the gap between the cover with buckle and the slider is 0.1mm, so the thickness of the paper towel used must be greater than 0.1mm, or even much greater than 0.1mm, to prevent the paper towel from falling off due to loosening. The paper towel can be folded before use.

[0058] It should be noted that, for those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0059] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A steel strip oil film thickness measuring device characterized by: The application relates to a steel belt oil film thickness measuring device, which comprises a main shell, a contact assembly arranged on the main shell, a plurality of oil absorption layers capable of being mounted on the contact assembly, and steel belt oil capable of penetrating into the oil absorption layers when the oil absorption layers are in contact with a steel belt. The contact assembly comprises a sliding block, the oil absorption layers can be mounted on the contact surface of the sliding block, the contact surface is the surface of the sliding block in contact with the steel belt, a cover is further mounted on the sliding block, buckles are arranged on the cover, the cover is mounted on the contact surface through the buckles, and the oil absorption layers can be fixed. Openings are arranged on the cover so that the oil absorption layers can be in contact with the steel belt oil on the steel belt. A pressure measuring device is further mounted on the main shell, the pressure measuring device is connected with the contact assembly, the contact pressure between the contact assembly and the steel belt can be measured, the pressure measuring device is connected with a controller, the controller is further connected with a timing module, the time can be recorded when the pressure signal is received, the time recording is stopped after the pressure signal disappears, and thus the contact time of the contact assembly with the steel belt is obtained. The contact time of the contact assembly with the steel belt in the contact time period and the maximum contact pressure are recorded, the number of the penetrated oil film layers of the oil absorption layers in the unit pressure and the unit time is calculated, and whether the oil film thickness is suitable is judged according to the number of the oil film layers. The front end of the main shell is further provided with a mounting cavity, the front end of the mounting cavity is provided with an opening, the front side of the sliding block is provided with the contact surface, the rear side of the sliding block is provided with a sliding part, the sliding part is mounted at the opening of the mounting cavity and can slide in the direction perpendicular to the contact surface, and the maximum pressing pressure is controlled by the distance between the front end part of the sliding block and the main shell. The pressure measuring device is mounted at the rear end of the mounting cavity, and the pressure measuring device is connected with the rear side of the sliding block through an elastic element.

2. The steel belt oil film thickness measuring device according to claim 1, characterized by: A buffer layer is further mounted on the contact surface of the sliding block, and the buffer layer is located between the oil absorption layers and the sliding block when the oil absorption layers are mounted on the sliding block.

3. The steel belt oil film thickness measuring device according to claim 2, characterized by: The pressure measuring device is a pressure sensor, and the elastic element is a spring.

4. The steel belt oil film thickness measuring device according to claim 1, characterized by: The rear end of the main shell is provided with a handle, a power supply compartment is arranged in the handle, the power supply of the steel belt oil film thickness measuring device is mounted in the power supply compartment, a power switch is further mounted on the handle, and the power switch is connected with the power supply.

5. The steel belt oil film thickness measuring device according to claim 4, characterized by: The controller is further connected with a display screen, the display screen can display the contact time of the contact assembly with the steel belt in the contact time period and the maximum contact pressure, and the display screen is mounted on the handle.

6. The steel belt oil film thickness measuring device according to claim 5, characterized by: The controller is further connected with a pressure time clear button, the pressure time clear button is mounted on the handle, and the contact time of the contact assembly with the steel belt in the contact time period and the maximum contact pressure displayed on the display screen can be cleared.

7. The steel belt oil film thickness measuring device according to claim 1, characterized by: The material of the main shell and the contact assembly is polytetrafluoroethylene.

8. A method of measuring the thickness of an oil film on a steel strip, characterized by: The steel belt oil film thickness measuring device is used to measure the thickness of the steel belt oil film. S1, installing multiple layers of the oil absorption layer on the contact assembly; S2, pressing the contact assembly on the surface of the steel strip in the opposite direction of the running of the steel strip, so that the oil absorption layer contacts the strip oil on the steel strip, and recording the contact time and the maximum contact pressure of the contact assembly within the contact time period with the steel strip; S3, observing the number of penetrated layers of the strip oil on the oil absorption layer; S4, calculating the number of penetrated layers of the oil film per unit pressure and per unit time on the oil absorption layer, and adjusting the oil injection amount according to the number of penetrated layers of the oil film.

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