A continuous hardness testing device for hot-rolled stainless steel plates

Abstract

The present invention relates to a hot-rolled stainless steel plate continuous hardness testing device in the field of hardness testing. In the present application, after the light beam between the electromagnetic slide rail detection and positioning unit located on the left side is cut off, the low-speed motor starts to work, driving the enabling plate and the rotating shaft to rotate. After the enabling plate is tilted, the detection unit will roll along the enabling plate, and due to the different inclination angles of the enabling plate, the lateral initial velocities of the detection unit are also different, which leads to different landing points of the detection unit on the steel plate to be tested. Hardness testing can be performed on most of the surface of the steel plate to be tested. The kinetic energy of the falling detection unit comes completely from its own potential energy, and the enabling plate can make the initial velocity of multiple detection units zero when they move to the position where the enabling plate is located. Therefore, the first impact of all the falling detection units on the surface of the steel plate to be tested is roughly equal, and continuous quantitative hardness testing can be performed on the steel plate to be tested.

Description

Technical Field

[0001] The present invention relates to a continuous hardness testing device, in particular to a hot-rolled stainless steel plate continuous hardness testing device applied in the field of hardness testing. Background Art

[0002] Stainless steel is a type of metal material whose main component is iron. However, unlike ordinary steel, it also contains alloy elements such as chromium, nickel, and molybdenum. The addition of these alloy elements gives stainless steel excellent corrosion resistance and the ability to resist oxidation and corrosion caused by environmental factors such as air and water. Stainless steel is commonly found in daily life, construction, and daily production. It is a commonly used material, and its hardness and bending resistance are important testing indicators.

[0003] The invention patent CN202211392801.8 specification discloses a method and device for online detection of the hardness of nickel-saving austenitic stainless steel strip. The method uses a ferrite measuring device to collect the ferrite value of the nickel-saving austenitic stainless steel strip test sample. The nickel-saving austenitic stainless steel strip test sample is obtained after the nickel-saving austenitic stainless steel strip is smelted and hot-rolled and then enters the continuous annealing and pickling production line. The sample data is processed to obtain the hardness of the nickel-saving austenitic stainless steel strip: the ferrite value is input into the processor, and the processor calculates the hardness of the nickel-saving austenitic stainless steel strip. Without cutting the sample and without damaging the nickel-saving austenitic stainless steel strip, the surface of the nickel-saving austenitic stainless steel strip is directly tested, the hardness value of the product is quickly fed back, and the hardness of the nickel-saving austenitic stainless steel strip is continuously tested.

[0004] In the above application, without cutting the sample and without damaging the nickel-saving austenitic stainless steel strip, the surface of the nickel-saving austenitic stainless steel strip can be tested directly, the hardness value of the product can be quickly fed back, and the hardness of the nickel-saving austenitic stainless steel strip can be continuously tested. However, in the above application, it is impossible to conduct a comprehensive test on the stainless steel plate, and only the sampling part can be tested. There is still no way to conduct a comprehensive test on the stainless steel plate. Summary of the invention

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that the prior art is unable to perform comprehensive inspection on the stainless steel plate, but only inspects the sampled part, and still cannot perform comprehensive inspection on the stainless steel plate.

[0006] In order to solve the above problems, the present invention provides a hot-rolled stainless steel plate continuous hardness testing device, comprising a testing room and a plurality of conveying rollers whose positions match each other, the testing room comprising an outer shell, an exchange port is bored on the outer shell, a travel route formed by a plurality of conveying rollers passes through the exchange port, a steel plate to be tested is laid on the plurality of conveying rollers, a plurality of positioning units are fixedly connected to the inner bottom plate of the outer shell, a light-emitting unit is connected to the upper end of the positioning unit, and the plurality of positioning units are all located in the gaps between the plurality of conveying rollers, an electromagnetic slide rail is bored on the upper top plate of the outer shell, a pair of electromagnetic sliders are slidably connected in the electromagnetic slide rail, a light-receiving unit is connected to the lower end of the electromagnetic slider, and a kinetic energy trigger is fixedly connected to the upper end of the testing room;

[0007] The kinetic energy trigger includes a trigger shell fixedly connected to the detection chamber, a discharge port is opened at the lower end of the trigger shell, and the trigger shell is communicated with the discharge port, a mounting platform is fixedly connected to the side wall of the discharge port, a low-speed motor is fixedly connected to the mounting platform, a rotating shaft is fixed to the power output end of the low-speed motor, and the rotating shaft passes through the discharge port and is rotatably connected to the discharge port, an enabling plate is fixedly connected to the discharge port, a plurality of detection units are loaded in the kinetic energy trigger, a feed port is opened at the upper end of the trigger shell, and a sealing cover is threadedly connected to the feed port.

[0008] In the above-mentioned hot-rolled stainless steel plate continuous hardness testing equipment, continuous and quantitative hardness testing can be performed on the surface of the steel plate to be tested.

[0009] As a further improvement of the present application, the spacing of the conveying rollers inside the inspection chamber is smaller than the spacing of the conveying rollers located outside the inspection chamber, thereby increasing the supporting effect of the conveying rollers on the steel plates to be inspected, making it less likely that the steel plates to be inspected will be excessively deformed under the impact of multiple inspection units.

[0010] As a further improvement of the present application, the detection unit includes a counterweight core, an outer wall of which is fixedly connected to a detection pin, and the density of the detection pin is greater than that of the counterweight core. During the falling process of the detection unit, the posture adjustment will occur due to the action of the detection pin, so that the detection pin of the entire detection unit faces downward, which facilitates the detection pin to perform hardness testing on the surface of the steel plate to be tested.

[0011] As a further improvement and supplement to the present application, the outer wall of the counterweight core is covered with an elastic shell, and a covering hole matching the detection pin is drilled on the elastic shell. The distance between the detection pin and the outer wall of the elastic shell is less than one tenth of the thickness of the elastic shell, and the mass of the elastic shell is less than one fifth of the mass of the counterweight core and the detection pin, wherein the elastic shell can protect the counterweight core and the detection pin, so that the detection unit is not easy to collide and cause the detection pin to break during the falling process, and when the detection unit contacts the steel plate to be tested, the elastic shell will be partially deformed, and the detection pin will collide with the steel plate to be tested to complete the hardness test. At the same time, as the steel plate to be tested collides with the detection unit, the kinetic energy of the detection unit will be lost, and the deformation of the steel plate to be tested under the action of the kinetic energy of the detection unit will gradually decrease. Therefore, the elastic shell can also effectively protect other structures of the detection chamber and the conveying roller, making it difficult for the detection unit to damage them.

[0012] As a further improvement to the present application, the detection unit includes multiple models, and the density and volume of the counterweight cores of the multiple models of detection units are different, so that the detection units falling at the same height can have different kinetic energies, which is convenient for meeting various hardness detection requirements.

[0013] As a further improvement to the present application, the colors of the elastic shells of multiple models are different, which is convenient for staff to distinguish and meet various hardness testing needs.

[0014] As another improvement of the present application, an inclined load-bearing plate is fixedly connected to the inner wall of the trigger housing, an electric hydraulic rod is fixedly connected to the upper wall of the trigger housing, an umbrella plate is fixedly connected to the outer wall of the electric hydraulic rod, and the umbrella plate and the inclined load-bearing plate are staggered. Through the action of the staggered inclined load-bearing plates and umbrella plates, a supporting effect can be provided for multiple detection units, so that the multiple detection units are not easily piled up on each other in the trigger housing, causing the detection units located on the lower side to bear too much weight and thus deform and fail. The movable electric hydraulic rod can be started at a fixed time to drive the umbrella plate to move up and down, thereby loosening the multiple detection units and avoiding local jamming of the detection units.

[0015] As another improvement of the present application, there is a gap between the discharge port and the enabling plate, and the length of the side section of the discharge port is greater than the diameter of the three detection units, so that multiple detection units are not easily stacked together to cause blockage.

[0016] As a further improvement of the present application, the low-speed motor rotates 90 degrees counterclockwise and then resets, then 90 degrees clockwise and resets again to complete an action cycle. The duration of one action cycle is 20 seconds, which makes the landing point of the detection unit relatively more uniform, thereby increasing the effectiveness of the detection.

[0017] To summarize, in the present application, after the light beam between the electromagnetic slide rail detection and positioning unit on the left is cut off, the low-speed motor starts working, driving the energy plate and the rotating shaft to rotate. After the energy plate is tilted, the detection unit will roll along the energy plate, and due to the different tilt angles of the energy plate, the initial lateral velocities of the detection unit are different, which leads to different landing points of the detection unit on the steel plate to be inspected. The hardness test can be performed on most of the surface of the steel plate to be inspected. The kinetic energy of the falling detection unit comes entirely from its own potential energy. Therefore, the first impact of all falling detection units on the surface of the steel plate to be inspected is roughly equal, and continuous quantitative hardness test can be performed on the surface of the steel plate to be inspected.

[0018] By arranging staggered inclined load-bearing plates and umbrella-shaped plates, a plurality of detection units are supported. The detection unit located on the lower side bears too much load and becomes deformed and fails. The movable electric hydraulic rod can be started at a fixed time to drive the umbrella-shaped plate to move up and down, thereby loosening the plurality of detection units and preventing the detection units from being partially stuck. The specific setting of the low-speed motor rotation can make the landing point of the detection unit relatively more uniform, thereby increasing the effectiveness of the detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of a stainless steel plate continuous hardness testing device according to a first embodiment of the present application;

[0020] Figure 2 This is a front cross-sectional view of a stainless steel plate continuous hardness testing device according to the first embodiment of the present application. Figure 1 ;

[0021] Figure 3 This is a front cross-sectional view of a stainless steel plate continuous hardness testing device according to the first embodiment of the present application. Figure 2 ;

[0022] Figure 4 This is a schematic structural diagram of a kinetic energy trigger according to a first embodiment of the present application;

[0023] Figure 5 This is a front cross-sectional view of a kinetic energy trigger according to a first embodiment of the present application;

[0024] Figure 6 It is a schematic diagram of the change of the energizing plate in the side cross-sectional view of the kinetic energy trigger of the first embodiment of the present application;

[0025] Figure 7 This is a schematic diagram of the structure of a detection unit according to the first embodiment of the present application;

[0026] Figure 8 A side cross-sectional view of a detection unit according to a first embodiment of the present application;

[0027] Fig. 9 A side cross-sectional view of a kinetic energy trigger according to a second embodiment of the present application;

[0028] Fig.10 This is a schematic diagram of the structural changes in the side sectional view of the kinetic energy trigger of the second embodiment of the present application.

[0029] Description of the numbers in the figure:

[0030] 1 detection room, 101 outer shell, 102 exchange port, 103 electromagnetic slide rail, 104 electromagnetic slider, 105 positioning unit, 2 conveyor roller, 3 steel plate to be inspected, 4 kinetic energy trigger, 401 trigger shell, 402 discharge port, 403 installation platform, 404 low-speed motor, 405 enabling plate, 406 rotating shaft, 407 sealing cover, 408 electric hydraulic rod, 409 umbrella plate, 410 inclined load-bearing plate, 5 detection unit, 501 counterweight core, 502 detection striker, 503 elastic shell. DETAILED DESCRIPTION

[0031] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0032] The first implementation method:

[0033] Figure 1-6 A hot-rolled stainless steel plate continuous hardness testing device is shown, comprising a testing chamber 1 and a plurality of conveying rollers 2 whose positions match each other, the testing chamber 1 comprising an outer shell 101, an exchange port 102 is bored on the outer shell 101, a travel route formed by the plurality of conveying rollers 2 passes through the exchange port 102, a steel plate 3 to be tested is laid on the plurality of conveying rollers 2, a plurality of positioning units 105 are fixedly connected to the inner bottom plate of the outer shell 101, a light emitting unit is connected to the upper end of the positioning unit 105, and the plurality of positioning units 105 are all located in the gaps between the plurality of conveying rollers 2, an electromagnetic slide rail 103 is bored on the upper top plate of the outer shell 101, a pair of electromagnetic sliders 104 are slidably connected in the electromagnetic slide rail 103, a light receiving unit is connected to the lower end of the electromagnetic slider 104, and after the position of the steel plate 3 to be tested is adjusted by feeding, when it is transported to the position where the positioning unit 105 and the electromagnetic slide rail 103 are located, the light beam between the light emitting unit and the light receiving unit will be cut off, and a kinetic energy trigger 4 is fixedly connected to the upper end of the testing chamber 1;

[0034] The kinetic energy trigger 4 includes a trigger housing 401 fixedly connected to the detection chamber 1, a discharge port 402 is formed at the lower end of the trigger housing 401, and the trigger housing 401 is communicated with the discharge port 402, a mounting platform 403 is fixedly connected to the side wall of the discharge port 402, a low-speed motor 404 is fixedly connected to the mounting platform 403, a rotating shaft 406 is fixedly provided at the power output end of the low-speed motor 404, and the rotating shaft 406 passes through the discharge port 402 and is rotatably connected to the discharge port 402, an energizing plate 405 is fixedly connected to the discharge port 402, a plurality of detection units 5 are loaded in the kinetic energy trigger 4, a feed port is formed at the upper end of the trigger housing 401, and a sealing cover 407 is threadedly connected to the feed port.

[0035] In the present application, before the hardness test begins, the two electromagnetic sliders 104 first move to positions matching the positioning units 105, and the specific movement positions of the electromagnetic sliders 104 are related to the transmission speed of the conveyor roller 2. The faster the transmission speed of the conveyor roller 2 is, the electromagnetic slider 104 on the left will move to a position matching the left positioning unit 105 close to the kinetic energy trigger 4, and the electromagnetic slider 104 on the right will move to a position matching the right positioning unit 105 close to the kinetic energy trigger 4. The steel plate 3 to be tested will enter the testing chamber 1 under the transportation of the conveyor roller 2, and after the light beam between the electromagnetic slide rail 103 on the left and the positioning unit 105 is cut off , the low-speed motor 404 starts working, driving the enabling plate 405 and the rotating shaft 406 to rotate. After the enabling plate 405 is tilted, the detection unit 5 will roll down along the enabling plate 405. Due to the different tilt angles of the enabling plate 405, the lateral initial velocities of the detection unit 5 are also different, which leads to different landing points of the detection unit 5 on the steel plate 3 to be inspected. The hardness test can be performed on most of the surface of the steel plate 3 to be inspected. The kinetic energy of the falling detection unit 5 comes entirely from its own potential energy. Therefore, the first impact of all the falling detection units 5 on the surface of the steel plate 3 to be inspected is roughly equal, so the surface of the steel plate 3 to be inspected can be continuously and quantitatively tested for hardness.

[0036] In particular, in the present application, the electromagnetic slider 104 on the right side can assist the electromagnetic slider 104 on the left side, detect the length of the steel plate 3 to be inspected to verify whether the electromagnetic slider 104 on the left side is in a normal working state, and the existence of the enabling plate 405 can limit the speed of the detection unit 5, so that the initial velocity of multiple detection units 5 when moving to the position of the enabling plate 405 is zero, so that the kinetic energy of the detection unit 5 can be controlled.

[0037] In particular, in the present application, the control of the working status of electrical structures including but not limited to the low-speed motor 404, the electromagnetic slider 104 and the positioning unit 105 is controlled by the control terminal mounted on the detection chamber 1, and the connection method and control method between the control terminal and the above-mentioned electrical structures are well-known technologies to those skilled in the art. Those skilled in the art can reasonably design according to the description of this application to meet the usage requirements of this application.

[0038] The inspected steel plate 3 can be quickly detected for surface defect traces through image recognition technology, and the difficulty of image recognition can be reduced by irradiating light that is not perpendicular to the surface of the steel plate 3 to form shadows in the surface depressions.

[0039] See also Figure 1-2 The spacing of the conveying rollers 2 in the detection chamber 1 is smaller than the spacing of the conveying rollers 2 located outside the detection chamber 1, thereby increasing the supporting effect of the conveying rollers 2 on the steel plate 3 to be inspected, so that the steel plate 3 to be inspected is not easily deformed excessively under the impact of multiple detection units 5.

[0040] See also Figure 7-8 The detection unit 5 includes a counterweight core 501, and a detection striker 502 is fixedly connected to the outer wall of the counterweight core 501, and the density of the detection striker 502 is greater than that of the counterweight core 501. During the falling process of the detection unit 5, the posture adjustment will occur due to the action of the detection striker 502, so that the detection striker 502 of the entire detection unit 5 faces downward, which is convenient for the detection striker 502 to perform hardness detection on the surface of the steel plate 3 to be inspected. The outer wall of the counterweight core 501 is coated with an elastic shell 503, and the elastic shell 503 is drilled with a coating hole matching the detection striker 502. The distance between the detection striker 502 and the outer wall of the elastic shell 503 is less than one tenth of the thickness of the elastic shell 503, and the mass of the elastic shell 503 is less than that of the counterweight core 50 1 and one-fifth of the mass of the detection striker 502, wherein the elastic shell 503 can protect the counterweight core 501 and the detection striker 502, so that the detection unit 5 is not easy to collide and cause the detection striker 502 to break during the falling process, and when the detection unit 5 contacts the steel plate 3 to be tested, the elastic shell 503 will be partially deformed, and the detection striker 502 will collide with the steel plate 3 to be tested to complete the hardness test. At the same time, as the steel plate 3 to be tested and the detection unit 5 collide, the kinetic energy of the detection unit 5 will be lost, and the deformation of the steel plate 3 to be tested under the kinetic energy of the detection unit 5 will gradually decrease. Therefore, the elastic shell 503 can also effectively protect other structures of the detection chamber 1 and the conveying roller 2, so that the detection unit 5 is not easy to damage them;

[0041] The detection unit 5 includes multiple models. The density and volume of the counterweight core 501 of the multiple models of detection units 5 are different, so that the detection units 5 falling at the same height can have different kinetic energy, which is convenient for various hardness detection needs. The colors of the elastic shells 503 of the multiple models are different, which is convenient for staff to distinguish and meet various hardness detection needs.

[0042] The second implementation method:

[0043] Figure 9-10 A kinetic energy trigger 4 is shown, wherein an inclined load-bearing plate 410 is fixedly connected to the inner wall of a trigger housing 401, an electric hydraulic rod 408 is fixedly connected to the upper wall of the trigger housing 401, an umbrella plate 409 is fixedly connected to the outer wall of the electric hydraulic rod 408, and the umbrella plates 409 and the inclined load-bearing plates 410 are staggered. Through the action of the staggered inclined load-bearing plates 410 and the umbrella plates 409, a plurality of detection units 5 can be supported, so that the plurality of detection units 5 are not easily piled up on each other in the trigger housing 401, causing the detection units 5 located on the lower side to bear too much load and thus deform and fail, and the movable electric hydraulic rod 408 can be started at a fixed time to drive the umbrella plate 409 to move up and down, thereby loosening the plurality of detection units 5 and preventing the detection units 5 from being partially stuck.

[0044] There is a gap between the discharge port 402 and the enabling plate 405 , and the length of the side section of the discharge port 402 is greater than the diameter of the three detection units 5 , so that the multiple detection units 5 are not easily stacked together to cause blockage.

[0045] The low-speed motor 404 rotates counterclockwise 90 degrees and then resets, and then clockwise 90 degrees and resets again to complete an action cycle. The duration of one action cycle is 20 seconds, so that the landing point of the detection unit 5 is relatively more uniform, thereby increasing the effectiveness of the detection.

[0046] Compared with the first embodiment, in the present application, a staggered inclined load-bearing plate 410 and an umbrella-shaped plate 409 are provided to support multiple detection units 5. The detection unit 5 located on the lower side bears too much load and becomes deformed and fails. The movable electric hydraulic rod 408 can be started at a fixed time to drive the umbrella-shaped plate 409 to move up and down, thereby loosening the multiple detection units 5 and preventing the detection units 5 from being partially stuck. The specific setting of the rotation of the low-speed motor 404 can make the landing point of the detection unit 5 relatively more uniform, thereby increasing the effectiveness of the detection.

[0047] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A hot-rolled stainless steel plate continuous hardness testing equipment, Features: The invention comprises a detection chamber (1) and a plurality of conveying rollers (2) whose positions match each other, wherein the detection chamber (1) comprises an outer shell (101), an exchange port (102) is bored on the outer shell (101), a travel route formed by the plurality of conveying rollers (2) passes through the exchange port (102), a steel plate (3) to be inspected is laid on the plurality of conveying rollers (2), a plurality of positioning units (105) are fixedly connected to the inner bottom plate of the outer shell (101), a light-emitting unit is connected to the upper end of the positioning unit (105), and the plurality of positioning units (105) are all located in the gaps between the plurality of conveying rollers (2), an electromagnetic slide rail (103) is bored on the upper top plate of the outer shell (101), a pair of electromagnetic sliders (104) are slidably connected in the electromagnetic slide rail (103), a light-receiving unit is connected to the lower end of the electromagnetic slider (104), and a kinetic energy trigger (4) is fixedly connected to the upper end of the detection chamber (1); The kinetic energy trigger (4) comprises a trigger housing (401) fixedly connected to the detection chamber (1); a discharge port (402) is formed at the lower end of the trigger housing (401), and the trigger housing (401) is in communication with the discharge port (402); a mounting platform (403) is fixedly connected to the side wall of the discharge port (402); a low-speed motor (404) is fixedly connected to the mounting platform (403); a rotating shaft (406) is fixedly connected to the power output end of the low-speed motor (404), and the rotating shaft (406) passes through the discharge port (402) and is rotatably connected to the discharge port (402); an energizing plate (405) is fixedly connected to the discharge port (402); a plurality of detection units (5) are loaded in the kinetic energy trigger (4); a feed port is formed at the upper end of the trigger housing (401), and a sealing cover (407) is threadedly connected to the feed port; The detection unit (5) comprises a counterweight core (501), a detection striker (502) is fixedly connected to the outer wall of the counterweight core (501), and the density of the detection striker (502) is greater than that of the counterweight core (501), the outer wall of the counterweight core (501) is coated with an elastic shell (503), and a coating hole matching the detection striker (502) is bored on the elastic shell (503), the distance between the detection striker (502) and the outer wall of the elastic shell (503) is less than one tenth of the thickness of the elastic shell (503), and the mass of the elastic shell (503) is less than one fifth of the mass of the counterweight core (501) and the detection striker (502).

2. A hot-rolled stainless steel plate continuous hardness testing device according to claim 1, Features: The spacing between the conveying rollers (2) in the detection chamber (1) is smaller than the spacing between the conveying rollers (2) located outside the detection chamber (1).

3. A hot-rolled stainless steel plate continuous hardness testing device according to claim 1, Features: The detection unit (5) comprises a plurality of models, and the density and volume of the counterweight core (501) of the plurality of models of the detection unit (5) are different.

4. A hot-rolled stainless steel plate continuous hardness testing device according to claim 1, Features: The colors of the elastic shells (503) of the multiple models are different.

5. The hot-rolled stainless steel plate continuous hardness testing device according to claim 1, Features: An inclined load-bearing plate (410) is fixedly connected to the inner wall of the trigger housing (401), an electric hydraulic rod (408) is fixedly connected to the upper wall of the trigger housing (401), an umbrella-shaped plate (409) is fixedly connected to the outer wall of the electric hydraulic rod (408), and the umbrella-shaped plate (409) and the inclined load-bearing plate (410) are arranged in a staggered manner.

6. A hot-rolled stainless steel plate continuous hardness testing device according to claim 1, Features: There is a gap between the discharge port (402) and the enabling plate (405), and the length of the side section of the discharge port (402) is greater than the diameter of the three detection units (5).

7. The hot-rolled stainless steel plate continuous hardness testing device according to claim 1, Features: The low-speed motor (404) rotates counterclockwise for 90 degrees and then resets, and then clockwise for 90 degrees and then resets again, completing an action cycle, and the duration of one action cycle is 20-30 seconds.

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