Device for high-precision online measurement of thickness of high-carbon chromium bearing steel red hot casting blank
By designing a high-precision online measurement device that includes a fixed arm, a movable rod, a main scale, a vernier and a micro bearing, the problem of low accuracy in measuring the thickness of red hot slabs during steelmaking and continuous casting is solved, and high-carbon measurement is achieved. High-precision measurement of the thickness of red-hot cast slabs of chromium bearing steel supports stable applications under light pressure.
Patent Information
- Application Number
- CN202420424394.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-06
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-03-06
AI Technical Summary
During the continuous casting of steelmaking, the red hot casting billet measurement of high-carbon chromium bearing steel has a problem of low accuracy, which leads to instability under light pressure, resulting in differentiation of carbides in finished materials and unstable quality.
A high-precision online measurement device is designed, including a fixed arm, a movable rod, a main scale, a vernier and a micro bearing. By limiting the moving direction of the movable rod, using an alumina ceramic plate for heat insulation, and using silicon nitride micro ceramic bearings , achieving high-precision measurement of the thickness of red-hot cast slabs.
It improves the measurement accuracy, reduces the thermal deformation of the equipment, ensures the stability and accuracy of the measurement, provides more realistic and accurate slab thickness data, and supports stable applications under light pressure.
Smart Images
Figure CN222378971U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of steelmaking and continuous casting, in particular to a device for high-precision online measurement of the thickness of red-hot cast billets of high-carbon chromium bearing steel. Background Art
[0002] High carbon chromium bearing steel is the most widely used type of bearing steel. Due to its high carbon content, improper continuous casting process control can easily lead to serious carbon segregation. Severe carbon segregation will cause carbide enrichment in the finished product after rolling, reduce the fatigue life and maximum load of the manufactured bearing, and cause bearing failure. Carbon segregation can be effectively improved by adopting appropriate light reduction technology in the steelmaking and continuous casting process. The application of light reduction requires a certain accuracy for the actual initial thickness of the billet entering the straightening machine, so as to stably control the segregation level of the billet. However, due to the different superheat degrees of different furnaces, the thickness of the billet will have slight differences. If light reduction with a fixed roll gap is used, it is easy to cause instability in the segregation of the billet, resulting in carbide differentiation and unstable quality of the finished material. At the same time, the initial roll gap setting of the first straightening machine is based on the actual thickness of the red hot billet. Inaccurate data can easily cause serious and different intermediate cracks in the billet.
[0003] Precise control of light reduction technology requires accurate and comprehensive data on the initial thickness of the ingot. Therefore, steel mills that produce high-carbon chromium bearing steel and use light reduction technology need to conduct multiple online measurements of the actual thickness of the red-hot ingot during the production process of high-carbon chromium bearing steel to provide reliable and accurate initial ingot thickness data for light reduction. The temperature of the red-hot ingot is relatively high (up to 1000°C) and the measurement environment is extremely poor, so the measurement tools are required to be convenient and accurate. Utility Model Content
[0004] The purpose of the utility model is to provide a device for high-precision online measurement of the thickness of high-carbon chromium bearing steel red-hot cast billet, which can more conveniently and accurately measure the thickness of high-carbon chromium bearing steel red-hot cast billet, has a simple structure, low cost, long service life and is easy to operate.
[0005] The utility model provides a device for high-precision online measurement of the thickness of red-hot cast billets of high-carbon chromium bearing steel, comprising a fixed arm base, a fixed arm body, a movable rod sleeve, a main scale, a movable rod handrail, a cursor and a movable rod, wherein the fixed arm base is fixedly connected to the fixed arm body, the movable rod sleeve is fixedly arranged on the fixed arm body, and the movable rod can slide up and down in the movable rod sleeve, the main scale is fixedly arranged on the fixed arm body, the movable rod handrail is fixedly connected to the movable rod, the cursor is fixedly connected to the movable rod, and the main scale can slide up and down in the cursor.
[0006] Preferably, the movable rod comprises an movable rod shaft and an movable rod cross bar, and the movable rod cross bar is fixedly connected to the movable rod shaft.
[0007] Preferably, it also includes an arm body fixing frame, which is fixedly connected to the arm body of the fixed arm.
[0008] Preferably, it also includes a heat insulation support plate, which is fixedly connected to the fixed arm body.
[0009] Preferably, it also includes a movable rod heat insulation plate, and the movable rod heat insulation plate is fixedly arranged on the movable rod cross bar.
[0010] Preferably, it also includes a micro bearing, which is arranged on the fixed arm base.
[0011] Preferably, it also includes a micro bearing, and the micro bearing is arranged on the movable rod cross bar.
[0012] The beneficial effects of the utility model are:
[0013] 1. This device limits the moving direction of the movable rod so that it can only move up and down, reducing the horizontal shaking of the movable rod, thereby improving the measurement accuracy;
[0014] 2. The use of alumina ceramic plates plays a role in heat insulation, which can reduce the thermal deformation of components and improve the accuracy and stability of the measuring device;
[0015] 3. Silicon nitride micro ceramic bearings are used in the device, which are resistant to high temperatures, lubrication-free and not easy to deform. During the process of the billet moving, rolling friction can be formed between the bearing and the measuring device, which can ensure the unchanged measuring position and prevent the billet from being scratched;
[0016] 4. When the traditional fixture measures the ingot, the fixture and the upper and lower surfaces of the ingot are in point contact, and it is difficult to make the line connecting the two points perpendicular to the upper and lower surfaces of the ingot. When this measuring device measures, the micro bearing forms a coplanar surface with the bottom of the ingot, and the two bearings in the component 10 contact the upper surface of the ingot, so the measured value is more real and accurate;
[0017] 5. This device is combined with a vernier caliper, and the accuracy of the vernier caliper is applied to this device, with an accuracy of up to 0.02mm, which greatly improves the reliability of the data;
[0018] 6. This device has simple structure, low cost, long service life and easy operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 : Schematic diagram of the structure of the utility model;
[0020] Figure numerals: fixed arm base 1, fixed arm body 2, insulation support plate 3, arm body fixing frame 4, movable rod sleeve 5, main scale 6, movable rod handrail 7, cursor 8, movable rod body 9, movable rod cross bar 10, movable rod insulation board 11, miniature bearing 12. DETAILED DESCRIPTION
[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.
[0022] In addition, the directional words mentioned in the following embodiments, such as "upper", "lower", "front", "back", etc., are only referenced to the directions of the drawings. Therefore, the directional words used are used to illustrate rather than limit the invention of the utility model.
[0023] like Figure 1 As shown, a device for high-precision online measurement of the thickness of red-hot ingots of high-carbon chromium bearing steel comprises a fixed arm base 1, a fixed arm body 2, a heat-insulating support plate 3, an arm body fixing frame 4, a movable rod sleeve 5, a main scale 6, a movable rod handrail 7, a vernier 8, a movable rod body 9, a movable rod crossbar 10, a movable rod heat-insulating plate 11 and a micro bearing 12. A micro bearing 12 is arranged on the fixed arm base 1. The fixed arm body 2 is in an inverted "L" shape, and the two ends of the arm body fixing frame 4 are respectively fixedly connected to two sections of the fixed arm body 2 that are perpendicular to each other, which plays a fixing role and is convenient for taking the device. The bottom end of the fixed arm body 2 is fixedly connected to the fixed arm base 1, the heat-insulating support plate 3 and the movable rod sleeve 5 are both arranged on the fixed arm body 2, and the main scale 6 of the vernier caliper is fixedly connected to the upper part of the fixed arm body 2. The movable rod shaft 9 is similar in shape to the fixed arm body 2, and it is movably connected to the movable rod sleeve 5 and can slide up and down in the movable rod sleeve 5. The vernier caliper's cursor 8 is fixedly connected to the movable rod body, and its size and position correspond to the main scale 6, so that the main scale 6 can slide up and down in the vernier 8. The movable rod cross bar 10 is fixedly connected to the lower part of the movable rod body 9, and a movable rod heat insulation board 11 and a miniature bearing 12 are arranged on the side close to the fixed arm base 1. The movable rod handrail 7 is fixedly arranged on one side of the movable rod body 9.
[0024] The combination of the movable rod sleeve 5 and the cursor 8 limits the movable rod's movable direction, so that it can only move up and down, reducing the horizontal shaking of the movable rod, thereby improving the measurement accuracy.
[0025] The heat-insulating support plate 3 and the movable rod heat-insulating plate 11 are made of alumina ceramic plates, which play a role of heat insulation, can reduce the thermal deformation of the device, and improve the accuracy and stability of the measuring device.
[0026] When the measuring device is measuring, the micro bearing 12 and the billet are coplanar, and the measured value is more real and accurate. The micro bearing 12 is a silicon nitride micro ceramic bearing, which is resistant to high temperature, lubrication-free and not easy to deform. During the billet movement, it can form rolling friction with the measuring device, which ensures that the measuring position remains unchanged and prevents the billet from being scratched.
[0027] When the device is used for measurement, according to the thickness of the measured ingot, the fixed arm base 1 and the movable rod cross bar 10 are lifted to a suitable position by controlling the arm body fixing frame 4 and the movable rod handrail 7, so that the ingot passes between the fixed arm base 1 and the movable rod cross bar 10, and the miniature bearing 12 in the fixed arm base 1 contacts the bottom of the ingot, and the two are coplanar. Then, the miniature bearing 12 in the movable rod cross bar 10 contacts the upper plane of the ingot. At this time, the sum of the value displayed by the vernier caliper and the initial bearing height difference between the fixed arm base 1 and the movable rod cross bar 10 is the initial thickness of the ingot.
[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A device for high-precision online measurement of the thickness of red-hot cast billets of high-carbon chromium bearing steel, characterized in that: It includes a fixed arm base, a fixed arm body, a movable rod sleeve, a main scale, a movable rod handrail, a cursor and a movable rod, wherein the fixed arm base is fixedly connected to the fixed arm body, the movable rod sleeve is fixedly arranged on the fixed arm body, and the movable rod can slide up and down in the movable rod sleeve, the main scale is fixedly arranged on the fixed arm body, the movable rod handrail is fixedly connected to the movable rod, the cursor is fixedly connected to the movable rod, and the main scale can slide up and down in the cursor.
2. The device for high-precision online measurement of the thickness of red-hot cast billet of high carbon chromium bearing steel according to claim 1, characterized in that: The movable rod comprises an movable rod shaft and an movable rod cross bar, and the movable rod cross bar is fixedly connected to the movable rod shaft.
3. The device for high-precision online measurement of thickness of red-hot cast billet of high carbon chromium bearing steel according to claim 1, characterized in that: It also includes an arm body fixing frame, which is fixedly connected to the arm body of the fixed arm.
4. The device for high-precision online measurement of thickness of red-hot cast billet of high carbon chromium bearing steel according to claim 1, characterized in that: It also includes a heat insulation support plate, which is fixedly connected to the fixed arm body.
5. The device for high-precision online measurement of thickness of red-hot cast billet of high carbon chromium bearing steel according to claim 1, characterized in that: It also includes a movable rod heat insulation plate, which is fixedly arranged on the movable rod cross bar.
6. The device for high-precision online measurement of thickness of red-hot cast billet of high carbon chromium bearing steel according to claim 1, characterized in that: Also included is a micro bearing, which is arranged on the fixed arm base.
7. The device for high-precision online measurement of thickness of red-hot cast billet of high carbon chromium bearing steel according to claim 1, characterized in that: Also included is a miniature bearing, which is arranged on the movable rod crossbar.