A kind of detection equipment suitable for steel bottle body online hardness

Abstract

The application discloses a kind of detection equipment suitable for steel bottle body online hardness, specifically relates to workpiece hardness detection technical field, including detection rack, conveying roller frame and steel bottle body, the top of the detection rack is equipped with pressure measuring head, and pressure measuring head is used to exert the preset pressure force to steel bottle body, the pressure component includes installation in conveying roller frame end lifting frame and fixedly connected in the top of lifting frame several support frames, the top of each support frame is equipped with two symmetrical centering rollers;The application provides preliminary vertical support when steel bottle body is not subjected to clamping force by support frame using four-row multi-point support structure, effectively eliminates the end droop phenomenon of steel bottle body on conveying roller frame due to cantilever effect, avoids the axis deviation of steel bottle caused by droop, and lays the foundation for subsequent hardness detection, and centering roller is stretched synchronously with lifting frame, which plays a stable guiding role in the lifting process of lifting frame.

Description

Technical Field

[0001] This invention relates to the field of workpiece hardness testing technology, specifically to a device suitable for online hardness testing of steel cylinder bodies. Background Technology

[0002] During the production of steel cylinders, hardness testing of the cylinder body is necessary to verify the stability of the heat treatment process and the mechanical properties of the cylinder itself. Traditional testing methods often employ offline sampling or manual handheld probe testing, which suffers from low testing efficiency, insufficient sampling coverage, and large human error. Existing online testing equipment typically uses single-sided or top-pressing methods to fix the cylinder, applying pressure from above or one side of the cylinder at the testing station via one or more pressing mechanisms. However, when the hardness testing probe contacts the cylinder surface and applies the test force, the probe and cylinder must maintain a stable and perpendicular contact. Since the cylinder itself is a cylindrical structure, it is prone to rolling or deflection around its axis when subjected to a single-direction pressing or testing force. This causes the contact point between the probe and the cylinder surface to deviate from the preset position, resulting in tilted test force direction and indentation deformation, directly affecting the accuracy of the hardness test results. Summary of the Invention

[0003] The purpose of this invention is to provide a device suitable for online testing of the hardness of steel cylinder bodies, so as to solve the above-mentioned shortcomings in the technology.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a testing device suitable for online hardness testing of steel cylinder bodies, comprising a testing frame, a conveying roller frame, and a steel cylinder body. A pressure probe is installed on the top of the testing frame, and the pressure probe is used to apply a preset clamping force to the steel cylinder body. The pressure assembly includes a lifting frame installed at the end of the conveying roller frame and several support frames fixedly connected to the top of the lifting frame. Each support frame has two symmetrical centering rollers installed on its top, and the outer surface of the centering rollers is in partial contact with the surface of the steel cylinder body. Sliding push frames are installed on both sides of the lifting frame, and a first side pressure block and two second side pressure blocks are respectively installed on the corresponding side of the two sliding push frames.

[0005] The lifting frame is connected to the testing frame by two first telescopic cylinders and two telescopic columns, and the telescopic columns support the lifting frame during the extension and retraction process.

[0006] Both sliding pushers are equipped with depth adjustment components between themselves and the lifting frame, and these components are used to ensure stable contact between the sliding pushers and the surface of the cylinder body.

[0007] One of the sliding pushers is provided with a dual-adjustment assembly on one side, and the dual-adjustment assembly is used to make the two second side pressure blocks contact the surface of the cylinder body at different positions.

[0008] The lifting frame is equipped with a power component on its exterior, which is used to coarsely process the surface particles of the cylinder body while driving the conveyor roller frame and the support frame to rotate.

[0009] Preferably, the depth adjustment assembly includes a pad plate movably connected to the side of the lifting frame near the sliding pusher. The side of the sliding pusher near the pad plate has two symmetrical centering slots. The two centering slots and the pad plate are connected together by two centering rods, and the sliding pusher is connected to the pad plate through the centering rods.

[0010] Each of the centering rods is fitted with a return spring, and the two ends of the return spring are respectively connected to the sliding push frame and the pad. The pad is elastically adaptively connected to the sliding push frame through the return spring.

[0011] Preferably, a middle support plate is connected between the sliding frame and the pad plate. An adjusting bolt is screwed onto the top of the middle support plate. Threaded holes for the adjusting bolt are correspondingly opened on the middle support plate and the lifting frame. An abutment ring is installed on the outside of the adjusting bolt, and the top of the abutment ring abuts against the bottom of the middle support plate.

[0012] Preferably, the dual-adjustment assembly includes two limiting plates fixedly connected to the top of the two second side pressure blocks and a servo motor fixedly connected to the top of one of the sliding pushers, and the output end of the servo motor is fixedly connected to a connecting plate.

[0013] Each of the two limiting plates is equipped with a centering shaft on one side, and the two centering shafts are movably connected to one side of the connecting plate by two arc strips. The second side pressure block is designed as a U-shaped structure.

[0014] Preferably, one side of one of the sliding pushers is also fixedly connected to a slider, and the two second side pressure blocks are each provided with a groove for the slider to be inserted on the side near one of the sliding pushers.

[0015] Preferably, the power assembly includes a guide column, which is sequentially inserted into the interior of each of the support frames from left to right. Each support frame has a placement groove at its top that communicates with its interior for guiding the rotation of two centering rollers.

[0016] The placement groove is internally connected to two symmetrical centering columns, and the centering roller is fixedly sleeved on the outside of the centering columns. The guide column is fixedly sleeved with two first toothed rings corresponding to the two centering columns, and a first toothed ring is sleeved between the first toothed rings and the centering columns.

[0017] The end of the guide column is fixedly connected to a second toothed ring, and the side of the lifting frame near the second toothed ring is fixedly connected to a power motor. The output end of the power motor and the outside of the second toothed ring are both fitted with a second toothed ring.

[0018] The testing frame is equipped with a stabilizing component that works with the centering roller. The stabilizing component is used to quickly remove impurities from the surface of the cylinder body so that the pressure probe can apply stable pressure to any position on the surface of the cylinder body.

[0019] Preferably, the stabilization assembly includes a stabilizing frame and a lower frame respectively installed inside the testing frame. A grinding disc is installed at the top of the stabilizing frame, and the grinding disc is staggered with the cylinder body.

[0020] The top of the stabilizing frame is fixedly connected to a second telescopic cylinder. The telescopic end of the second telescopic cylinder is connected to a slide block together with the outside of the grinding disc. The top of the stabilizing frame is provided with a guide frame opening for guiding the slide block to move.

[0021] Preferably, a protective shell is also installed on the outside of the slide block. The protective shell is fitted over the outside of the grinding disc, and there is a gap between the protective shell and the grinding disc. An inclined thin air duct is fixed on the side of the protective shell near the grinding disc, and a blower is installed on the top of the thin air duct.

[0022] In the above technical solution, the technical effects and advantages provided by the present invention are as follows: The present invention adopts a four-row multi-point support structure for the support frame, which provides initial vertical support when the cylinder body is not subjected to clamping force, effectively eliminating the end drooping phenomenon of the cylinder body on the conveyor roller frame caused by the cantilever effect, avoiding the cylinder axis deviation caused by drooping, and laying the posture foundation for subsequent hardness testing. The centering roller extends synchronously with the lifting frame, which not only plays a stable guiding role in the lifting process of the lifting frame, but also forms a positive pressure with the help of the cylinder's own weight after contacting the surface of the cylinder body. The outer ring texture is embedded in the micro-unevenness of the cylinder surface to construct a reliable friction transmission pair. The power motor uses multiple sets of The meshing transmission of the gear ring and gear drive the centering roller to rotate synchronously. The friction provides circumferential driving force to the cylinder body, enabling precise circumferential angle adjustment of the cylinder body. At the same time, the first and second side pressure blocks maintain appropriate radial clamping, ensuring that the cylinder axis position does not shift radially while allowing cylinder rotation. This achieves functional complementarity between static support (support frame) and dynamic support (centering roller), ensuring both the stability of the cylinder's posture when it is not rotating and the reliability and accuracy of support during cylinder rotation. This effectively solves the technical pain points of unstable support and axis shift when the cylinder rotates in existing testing equipment, and improves the controllability of the cylinder's posture.

[0023] This invention drives a sliding pusher towards the cylinder body via a guide rail below the lifting frame. This causes the first side pressure block and two second side pressure blocks to abut against the cylinder surface and apply a preset clamping force, achieving multi-degree-of-freedom constraint on the cylinder body. The support frame, as the bottom support foundation, effectively bears the vertical component force generated by the cylinder's own weight and the clamping force, preventing vertical displacement of the cylinder. The first and second side pressure blocks apply clamping force in a direction perpendicular to the cylinder's axis, limiting the cylinder's radial displacement. The lines of action of the three forces are orthogonal to each other or form a reasonable angle, effectively avoiding mutual interference between the forces. This ensures that the cylinder body is under control throughout the entire process from entering the testing station to completing clamping. It completely solves the problem of testing errors caused by posture deviation and force interference during cylinder clamping in existing testing equipment, significantly improving the stability of the testing process and providing reliable posture assurance for the accuracy of subsequent hardness testing.

[0024] This invention places the grinding disc and pressure probe near the testing station, eliminating the need for station transfer after grinding. The grinding area is aligned with the pressure probe simply by rotating the centering roller at a small angle. This minimizes the time interval between grinding and testing, preventing the surface from being contaminated with impurities again after grinding. At the same time, it allows the pressure probe to complete the test during the window of optimal surface activity after grinding. This effectively solves the problems of separation between grinding and testing stations, secondary surface contamination, and distortion of test results caused by missed testing windows in existing equipment, significantly improving the authenticity and accuracy of hardness test results.

[0025] This invention uses a drive cylinder assembly to push a stabilizing frame, which in turn moves the grinding disc closer to the cylinder body. A second telescopic cylinder drives a slide block to adjust the contact position of the grinding disc, achieving precise coarse grinding of the cylinder surface. This effectively removes impurities, oxide layers, and other deposits that interfere with testing, ensuring the cleanliness of the test surface. After the blower is started, it compresses air to form a high-speed airflow, which is then sprayed obliquely outward through a fine air duct to accelerate the airflow in the grinding area, promptly carrying away the debris generated during grinding and preventing debris from adhering to the cylinder surface or the grinding disc, further improving the grinding and cleaning effect.

[0026] This invention uses adjusting bolts that engage with threaded holes on the central support plate and lifting frame to move the central support plate between the pad and the sliding frame. Utilizing the slope of the central support plate, the sliding frame, and the pad, and under the elastic contraction of the return spring, the sliding frame and pad are pulled towards the central support plate, achieving precise fine-tuning of the sliding frame's position. As the pad moves, the centering rod moves deeper into the centering groove, guiding and positioning the pad's movement and ensuring accurate sliding frame trajectory. This, in turn, causes the first and second side pressure blocks to adjust their positions synchronously, achieving secondary fine-tuning of the distance between the sliding frame and the cylinder body. This adapts to cylinder bodies of different diameters and specifications, solving the problems of fixed side pressure block positions in existing equipment, inability to adapt to multiple cylinder sizes, or insufficient adjustment precision leading to unstable clamping. It improves the equipment's versatility and clamping adaptability, ensuring that cylinders of different sizes receive stable and appropriate clamping force.

[0027] This invention uses a servo motor to drive the connecting plate to rotate, which in turn moves two arc strips. These arc strips, through contact with a centering shaft, cause the centering shaft to move relative to one side of the sliding frame. This, in turn, causes two second-side pressure blocks to move relative to each other via a limiting plate. The second-side pressure blocks, guided by a sliding groove and a slider, ensure precise movement trajectories and synchronize the adjustment of their contact positions with the cylinder body. This structure allows for precise adjustment of the relative distance between the two second-side pressure blocks. Combined with the position adjustment of the first-side pressure block, this ensures the cylinder body remains stable during testing, keeping the contact point between the pressure probe and the cylinder surface at a preset position. This guarantees that the testing force acts vertically and stably on the cylinder surface, effectively avoiding problems such as irregular indentation patterns and hardness measurement deviations caused by contact point offset and test force tilt, further improving the accuracy and consistency of hardness testing.

[0028] The first side pressure block of this invention adopts an inclined structure, with its pressing surface forming a preset inclined angle with the radial direction of the cylinder. This decomposes the pressing force into a radial clamping component and an axial positioning component, achieving both radial clamping of the cylinder and axial movement of the cylinder towards a preset reference, thus achieving precise axial positioning of the cylinder. The circumferentially extending texture on the surface of the first side pressure block embeds into microscopic unevenness on the cylinder surface, significantly increasing the friction coefficient of the contact surface. This effectively prevents overshoot displacement of the cylinder under the axial force or axial rebound during the detection process, ensuring the stability of the cylinder's posture. The two second side pressure blocks adopt a U-shaped structure. The structure forms multiple points of contact with the outside of the cylinder, creating an asymmetrical contact pattern with the first side clamping block. This ensures a uniform distribution of local stress during cylinder clamping, effectively preventing surface indentations and deformation caused by excessive clamping force. While guaranteeing constraint stability, it also protects the surface quality of the cylinder. This structural design effectively solves the technical problems of existing side clamping blocks that can only achieve radial clamping and cannot achieve axial positioning, as well as the damage to the cylinder surface caused by clamping stress concentration. It provides the pressure probe with a precisely positioned, stable, and intact testing object, fundamentally ensuring the accuracy of hardness testing. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0030] Figure 1 This is a schematic diagram of the overall structure of the cylinder body of the present invention.

[0031] Figure 2 For the present invention Figure 1 A magnified view of section A in the image.

[0032] Figure 3 This is a schematic diagram of the support frame of the present invention.

[0033] Figure 4 This is an exploded view of the depth tuning component of the present invention.

[0034] Figure 5 This is an exploded view of the dual-adjustment component of the present invention.

[0035] Figure 6 This is a schematic diagram of the structure of the first toothed ring of the present invention.

[0036] Figure 7 This is a schematic diagram of the structure of the grinding disc of the present invention.

[0037] Figure 8 This is a schematic diagram of the structure of the protective shell of the present invention.

[0038] Explanation of reference numerals in the attached drawings: 1. Detection frame; 11. Conveyor roller frame; 12. Cylinder body; 13. Pressure probe; 2. Pressure assembly; 21. Lifting frame; 22. Support frame; 23. Centering roller; 24. First telescopic cylinder; 25. Telescopic column; 26. Sliding pusher; 27. First side pressure block; 28. Second side pressure block; 3. Depth adjustment assembly; 31. Pad; 32. Centering groove; 33. Centering rod; 34. Return spring; 35. Middle support plate; 36. Threaded hole; 37. Adjusting bolt; 38. Abutment ring; 4. Double adjustment assembly; 41. Slider. ; 42. Slide groove; 43. Limiting plate; 44. Arc strip; 45. Centering shaft; 46. Connecting plate; 47. Servo motor; 5. Power assembly; 51. Placement slot; 52. Centering column; 53. First gear ring; 54. First gear ring; 55. Guide column; 56. Second gear ring; 57. Power motor; 58. Second gear ring; 6. Stabilizing assembly; 61. Stabilizing frame; 62. Lower frame; 63. Second telescopic cylinder; 64. Slide seat; 65. Grinding disc; 66. Protective shell; 67. Guide frame opening; 68. Thin air duct; 69. Blower. Detailed Implementation

[0039] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0040] This invention provides, for example Figure 1 , Figure 2 , Figure 3 and Figure 4 The device shown is suitable for online hardness testing of steel cylinder body, including a testing frame 1, a conveying roller frame 11 and a steel cylinder body 12. A pressure probe 13 is installed on the top of the testing frame 1, and the pressure probe 13 is used to apply a preset clamping force to the steel cylinder body 12.

[0041] The pressure assembly 2 includes a lifting frame 21 installed at the end of the conveying roller frame 11 and several support frames 22 fixedly connected to the top of the lifting frame 21. Each support frame 22 has two symmetrical centering rollers 23 installed on its top, and the outer side of the centering rollers 23 is in partial contact with the surface of the cylinder body 12. Sliding pushers 26 are installed on both sides of the lifting frame 21. A first side pressure block 27 and two second side pressure blocks 28 are respectively installed on the corresponding side of the two sliding pushers 26.

[0042] Two first telescopic cylinders 24 and two telescopic columns 25 are respectively connected between the lifting frame 21 and the testing frame 1, and the telescopic columns 25 support the lifting frame 21 during the extension and retraction process.

[0043] A depth adjustment assembly 3 is installed between each of the two sliding pushers 26 and the lifting frame 21. The depth adjustment assembly 3 is used to keep the sliding pushers 26 in stable contact with the surface of the cylinder body 12. The depth adjustment assembly 3 includes a pad 31 movably connected to the side of the lifting frame 21 near the sliding pusher 26. The side of the sliding pusher 26 near the pad 31 has two symmetrical centering grooves 32. The two centering grooves 32 and the pad 31 are connected together by two centering rods 33. The sliding pusher 26 is connected to the pad 31 through the centering rods 33.

[0044] Each centering rod 33 is fitted with a return spring 34, and the two ends of the return spring 34 are connected to the sliding push frame 26 and the pad 31 respectively. The pad 31 forms an elastic adaptive connection with the sliding push frame 26 through the return spring 34. A middle support plate 35 is connected between the sliding push frame 26 and the pad 31. An adjusting bolt 37 is screwed on the top of the middle support plate 35. The middle support plate 35 and the lifting frame 21 are respectively provided with threaded holes 36 for the adjusting bolt 37 to be screwed in. An abutment ring 38 is installed on the outside of the adjusting bolt 37, and the top of the abutment ring 38 abuts against the bottom of the middle support plate 35.

[0045] refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, there are four sets of support frames 22, which are fixedly connected to the top of the lifting frame 21 from left to right. The four sets of support frames 22 are spaced apart to provide multi-segment support for the cylinder body 12 at the end of the conveyor roller frame 11, ensuring stable pressure is applied between the pressure probe 13 and the cylinder body 12. There are eight centering rollers 23, with two centering rollers 23 mounted on top of one of the support frames 22. The outer surface of the centering rollers 23 has textured surfaces, ensuring proper contact between the centering rollers and the cylinder body 12. The surfaces have a certain friction after contact; the specific number of depth adjustment components 3 is the same as the number of sliding push frames 26, both being two sets, and each set of sliding push frames 26 and each set of depth adjustment components 3 maintain mutual cooperation; the inside of the testing frame 1 is a general assembly, which is equipped with telescopic devices, and the telescopic devices are connected to the stabilizing frame 61, so that the stabilizing frame 61 can move up and down along the internal guide of the testing frame 1; the specific structure and principle of the testing frame 1, pressure probe 13 and conveying roller frame 11 are all existing technologies, so they are not described in detail in this application. At present, in the hardness testing process, the testing equipment process is usually as follows: First, after powering on, operate the control panel inside the testing frame 1, and use the industrial control system inside the testing frame 1 to call the corresponding testing formula according to the material, specifications and standard requirements of the gas cylinder to be tested, preset the test force, holding time, number of test points, qualified hardness threshold, milling depth and other parameters to complete the system self-test.

[0046] The cylinder body 12 automatically enters the testing station along the conveyor roller frame 11. After the infrared sensor detects the cylinder body 12, the control system commands the roller conveyor to stop and precisely positions the cylinder to complete the operation. Immediately afterwards, the crossbeam inside the testing frame 1 descends and presses the cylinder body 12 from above to ensure rigidity and stability during the testing process. The pressure device moves to the pre-treated plane of the cylinder body 12 and applies a precise test force according to the preset scale. After holding for a certain period of time, it is unloaded, leaving a circular indentation on the surface of the cylinder body 12. The equipment uses a high-precision CMOS or CCD camera to automatically capture the indentation image, and automatically identifies the edge of the indentation and calculates the diameter through image processing algorithms, thereby calculating an accurate hardness value, thus completing the testing process of the cylinder body 12.

[0047] like Figure 3 As shown, two sliding pushers 26 are arranged on both sides of the support frame 22, and a track is provided below the contact part between the two sliding pushers 26 and the lifting frame 21. The specific structure and principle of the guide rail are existing technologies, so they are not described in detail here. The first side pressure block 27 and the depth adjustment component 3 are all arranged on the guide rail. The arrangement of the guide rail allows the two sliding pushers 26 at the top of the lifting frame 21 to move relative to each other on both sides of the support frame 22. The centering roller 23 and the first side pressure block 27 are textured on the side near the cylinder body 12, and the side of the first side pressure block 27 near the cylinder body 12 is inclined. The second side pressure block 28 is U-shaped. The output end of the power motor 57 is provided with transmission teeth that mesh with the second gear ring 58.

[0048] refer to Figure 4 and Figure 5 As shown, one of the sliding pushers 26 is provided with a dual adjustment component 4 on one side, and the dual adjustment component 4 is used to make the two second side pressure blocks 28 contact the surface of the cylinder body 12 at different positions. The dual adjustment component 4 includes two limiting plates 43 fixedly connected to the top of the two second side pressure blocks 28 and a servo motor 47 fixedly connected to the top of one of the sliding pushers 26. The output end of the servo motor 47 is fixedly connected to a connecting plate 46.

[0049] Two centering shafts 45 are installed on one side of each of the two limiting plates 43, and two arc strips 44 are movably connected to one side of the connecting plate 46 on the outside of the two centering shafts 45. The second side pressure block 28 is designed as a U-shaped structure. A slider 41 is also fixedly connected to one side of one of the sliding pushers 26. The two second side pressure blocks 28 are provided with a groove 42 for the slider 41 to be inserted on the side of one of the sliding pushers 26.

[0050] refer to Figure 2 , Figure 3 , Figure 6 , Figure 7 and Figure 8As shown, the lifting frame 21 is provided with a power assembly 5 on its exterior. The power assembly 5 is used to coarsely process the surface particles of the cylinder body 12 while driving the conveyor roller frame 11 and the support frame 22 to rotate. The power assembly 5 includes a guide column 55, which is sequentially inserted into the interior of each support frame 22 from left to right. Each support frame 22 has a placement groove 51 on its top that communicates with its interior and allows two centering rollers 23 to be guided to rotate.

[0051] The placement groove 51 is internally connected to two symmetrical centering posts 52, and the centering roller 23 is fixedly sleeved on the outside of the centering posts 52. The guide post 55 is fixedly sleeved on the outside of two first toothed rings 53 corresponding to the two centering posts 52, and a first toothed ring 54 is sleeved between the first toothed rings 53 and the centering posts 52.

[0052] The end of the guide column 55 is fixedly connected to a second toothed ring 56, and the side of the lifting frame 21 near the second toothed ring 56 is fixedly connected to a power motor 57. The output end of the power motor 57 and the outside of the second toothed ring 56 are both fitted with a second toothed ring 58.

[0053] The inside of the testing frame 1 is equipped with a stabilizing component 6 that cooperates with the centering roller 23. The stabilizing component 6 is used to quickly remove impurities from the surface of the cylinder body 12 so that the pressure probe 13 can apply stable pressure to any position on the surface of the cylinder body 12.

[0054] The stabilization assembly 6 includes a stabilizing frame 61 and a lower frame 62, which are respectively installed inside the testing frame 1. A grinding disc 65 is installed on the top of the stabilizing frame 61, and the grinding disc 65 is staggered with the cylinder body 12.

[0055] The top of the stabilizing frame 61 is fixedly connected to a second telescopic cylinder 63. The telescopic end of the second telescopic cylinder 63 is connected to a slide 64 together with the outside of the grinding disc 65. The top of the stabilizing frame 61 is provided with a guide frame opening 67 for guiding the slide 64 to move. A protective shell 66 is also installed on the outside of the slide 64. The protective shell 66 is fitted on the outside of the grinding disc 65, and there is a gap between the protective shell 66 and the grinding disc 65. An inclined thin air duct 68 is fixed on the side of the protective shell 66 near the grinding disc 65. A blower 69 is installed on the top of the thin air duct 68.

[0056] Working principle: When using: refer to Figure 1 , Figure 2 and Figure 3 As shown, when it is necessary to test the hardness of the cylinder body 12.

[0057] First, the telescopic drive of the first telescopic cylinder 24 pushes the lifting frame 21 to move upward along the interior of the testing frame 1. Then, the support frame 22 at the top of the lifting frame 21 remains horizontal with the conveying roller frame 11, and the centering roller 23 extends along with the movement of the lifting frame 21 during the upward movement to keep the lifting frame 21 stable during the lifting process. Next, the cylinder body 12 is transported by the conveying roller frame 11 to the area below the pressure probe 13. The end area of ​​the cylinder body 12 enters the area above the support frame 22. The four rows of support frames 22 simultaneously support the bottom of the cylinder body 12, forming multi-point support along the axial direction of the cylinder body 12. The support frame 22 provides preliminary vertical support when the cylinder body 12 is not subjected to clamping force, so that the end area of ​​the cylinder body 12 is in a stable support state before the clamping action begins, eliminating the end drooping phenomenon of the cylinder body 12 on the conveying roller frame 11 due to the cantilever effect.

[0058] refer to Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, immediately afterward, the outer ring of the centering roller 23 contacts the surface of the cylinder body 12. At this time, a certain positive pressure is formed between the weight of the cylinder body 12 and the centering roller 23, and the texture of the outer ring of the centering roller 23 is embedded in the microscopic unevenness of the surface of the cylinder body 12 under the action of this positive pressure, forming a reliable friction transmission pair. Then, the power motor 57 drives the transmission teeth at its end to maintain meshing with the second gear ring 58, which is used to drive the second gear ring 58 to rotate. The second gear ring 58 maintains meshing with the second gear ring 56 as it rotates, which is used to drive the guide column 55 to rotate synchronously along the inside of the support frame 22. As the guide column 55 rotates, it drives the first gear ring 53 outside it to rotate synchronously. The rotation of the first gear ring 53 maintains meshing transmission with the first gear ring 54 and is used to drive the centering column 52 to rotate. Subsequently, the centering column 52 rotates along the inside of the placement groove 51. Then, the rotation of the centering column 52 drives the centering roller 23 to rotate synchronously, thus the centering roller 23... The friction between the outer ring texture and the surface of the cylinder body 12 generates a circumferential driving force. During this process, the first side pressure block 27 and the two second side pressure blocks 28 on both sides of the support frame 22 maintain a radial clamping state on the cylinder body 12, but the clamping force is controlled within the range that allows the cylinder body 12 to rotate. The surface of the first side pressure block 27 and the two second side pressure blocks 28 changes from a static friction state to a dynamic friction state. However, the axial position of the cylinder body 12 remains stable due to the continuous existence of the clamping force and does not undergo radial displacement. After the cylinder body 12 rotates to the preset circumferential angle, the centering roller 23 stops rotating. Therefore, the support frame 22 provides static support for the cylinder body 12 to ensure the stability of the cylinder body 12 in the non-rotating state, while the centering roller 23 provides dynamic support. During the rotation of the cylinder body 12, it maintains continuous contact with the cylinder, bearing part of the vertical load and providing rotational driving force. The two complement each other in terms of support function.

[0059] refer to Figure 1 , Figure 2 and Figure 3As shown, the cylinder body 12 is then initially constrained in the vertical degree of freedom. The guide rails below the lifting frame 21 drive the two sliding pushers 26 at the top of the lifting frame 21 to move toward the cylinder body 12 on both sides of the support frame 22 until the first side pressure block 27 and the two second side pressure blocks 28 abut against the two sides of the cylinder body 12 and apply a preset clamping force. During this process, the support frame 22, as the bottom support base of the cylinder body 12, bears the vertical component force generated by the weight of the cylinder body 12 and the clamping force. The first side pressure block 27 and the two second side pressure blocks 28 apply clamping force in the direction perpendicular to the axis, so that the cylinder body 12 is effectively constrained in multiple degrees of freedom. This ensures that the cylinder body 12 is always under control from entering the inspection station to completing the clamping process. The lines of action of the three forces are orthogonal to each other or at a reasonable angle, avoiding mutual interference between the forces and further improving the stability of the inspection process and the accuracy of the inspection results.

[0060] refer to Figure 1 , Figure 7 and Figure 8 As shown, after the exterior of the cylinder body 12 is rotated and adjusted, the drive cylinder assembly inside the detection frame 1 pushes the stabilizing frame 61 to move downwards along its interior. The stabilizing frame 61 then drives the grinding disc 65 to pass through the lower connecting frame 62 and approach the exterior of the cylinder body 12. At this time, the grinding disc 65 and the cylinder body 12 maintain an alternating vertical position. Next, the extension and retraction of the second telescopic cylinder 63 pushes the slide 64 to move along the guide frame opening 67. As the slide 64 moves, the contact position of the grinding disc 65 with the exterior of the cylinder body 12 is adjusted. Then, the grinding disc 65 rotates to perform rough grinding on the surface of the cylinder body 12, removing impurities from the exterior of the cylinder body 12. During the cleaning process, while the grinding disc 65 is grinding the surface of the cylinder body 12, the blower 69 is started, drawing in outside air through the air inlet. Inside the blower 69, the air is compressed through continuous increases in speed and pressure, gaining high energy and then pushed along the internal flow channel of the blower 69 to the air outlet of the blower 69. Here, pressure and speed are converted into kinetic energy, forming a high-speed airflow that is ejected. The ejected airflow is sprayed at an angle through the thin air pipe 68 towards the outside of the grinding disc 65 to promote airflow around it. This ensures that the grinding disc 65 can effectively process the surface of the cylinder body 12, and also ensures that the pressure probe 13 can accurately detect on the clean surface after grinding.

[0061] refer to Figure 1 , Figure 7 and Figure 8As shown, the grinding disc 65 and the pressure probe 13 are located near the testing station. After the cylinder body 12 is ground, it does not need to be transferred between stations. It only needs to be rotated at a small angle by the centering roller 23 to align the grinding area with the pressure probe 13. The time interval between grinding and testing is extremely short, which effectively avoids the surface from being contaminated with impurities again during the transfer process after grinding. This minimizes the time interval between grinding and testing, and the pressure probe 13 can complete the test within the window period when the surface activity is at its best after grinding, ensuring the authenticity of the test results.

[0062] refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, when the distance between the sliding frame 26 and the cylinder body 12 needs to be adjusted a second time according to actual needs, so that the first side pressure block 27 and the two second side pressure blocks 28 are adjusted synchronously with the cylinder body 12 that is not in contact, one of the adjusting bolts 37 is rotated to keep it engaged with the threaded hole 36 inside the middle support plate 35 and the threaded hole 36 inside the lifting frame 21. Then the adjusting bolt 37 moves upward along the inside of the threaded hole 36, and the abutment ring 38 abuts against the middle support plate 35 and drives the middle support plate 35 to move between the pad plate 31 and the sliding frame 26. Immediately afterwards, the two sides of the middle support plate 35 maintain an angle with the sliding frame 26 and the pad plate 31 respectively. The two sides of the middle support plate 35 are matched so that the sliding push frame 26 and the pad plate 31 maintain a floating distance. As the two return springs 34 elastically contract, they pull the sliding push frame 26 and the pad plate 31 to move towards the sides of the middle support plate 35. The movement of the pad plate 31 drives the two centering rods 33 to move deeper into the two centering grooves 32. As a result, the movement of the sliding push frame 26 drives the first side pressure block 27 to move synchronously along the top of the lifting frame 21, so that the original position of the first side pressure block 27 is changed. Similarly, rotating another adjusting bolt 37 is used to drive another sliding push frame 26 to move along the top of the lifting frame 21, so that the original positions of the two second side pressure blocks 28 are changed.

[0063] refer to Figure 3 , Figure 4 and Figure 5As shown, simultaneously, the relative positions of the two second side pressure blocks 28 need to be moved. The servo motor 47 drives the connecting plate 46 to rotate synchronously. The rotation of the connecting plate 46 then moves the two arc bars 44. Following this, the movement of the two arc bars 44 causes their interiors to abut against the exteriors of the two centering shafts 45, causing the two centering shafts 45 to move relative to each other along one side of another sliding pusher 26. This causes the two limiting plates 43 to move along with the two centering shafts 45. Subsequently, the two limiting plates 43 drive the two second side pressure blocks 28 to move relative to each other. The movement of the two second side pressure blocks 28 then... The sliding groove 42 on the outside of the slide block 41 moves along the external guide of the slider 41, which is used to guide the second side pressure block 28 along one side of another sliding pusher 26. This allows the adjustment of the two second side pressure blocks 28 to be synchronized with the contact position on the outside of the cylinder body 12. Thus, the adjustment of the two second side pressure blocks 28 and the first side pressure block 27 ensures the stability of the cylinder body 12's posture during the test. The contact point between the pressure probe 13 and the surface of the cylinder body 12 is always kept in the preset position, and the test force can be applied vertically and stably to the cylinder surface, thereby ensuring the regularity of the indentation shape and the accuracy of the hardness measurement value.

[0064] refer to Figure 3 , Figure 4 and Figure 5As shown, finally, during the contact between the first side pressure block 27 and the two second side pressure blocks 28 and the cylinder body 12, the first side pressure block 27 is designed with an inclined structure. Its core feature is that the pressing surface of the first side pressure block 27 in contact with the cylinder body 12 is arranged inclined in a plane perpendicular to the axis of the cylinder body 12. That is, there is a preset inclined angle between the normal direction of the pressing surface and the radial direction of the cylinder body 12. When the inclined end moves toward and contacts the cylinder body 12, due to the inclined design of the pressing surface, the pressing force applied by the end to the cylinder body 12 can be decomposed into two mutually perpendicular components: one is the component along the radial horizontal direction of the cylinder body 12, which is used to provide radial clamping; the other is the component along the axial direction of the cylinder body 12, which is used to push the cylinder body 12 to move axially toward the preset positioning reference direction. At the same time, the part of the first side pressure block 27 near the cylinder body 12 is provided with texture. The texture extends and is distributed circumferentially along the cylinder body 12, forming The micro-scale toothed or wavy structure, when the first side pressure block 27 contacts the surface of the cylinder body 12 and applies clamping force, embeds the texture into the micro-unevenness of the cylinder body 12 surface, significantly increasing the friction coefficient between the contact surfaces. This effectively prevents the cylinder body 12 from overshooting under axial force or from axial rebound during testing. Simultaneously, the two second side pressure blocks 28 are U-shaped, with the U-shaped ends forming multi-point contact with the outside of the cylinder body 12. This results in the first side pressure block 27 and the two second side pressure blocks 28 forming an asymmetrical contact shape after contacting the cylinder body 12. This makes the local stress level of the cylinder body 12 more uniform under clamping conditions, effectively preventing indentations or deformation on the surface of the cylinder body 12 due to excessive clamping force. While ensuring constraint stability, it also protects the surface quality of the cylinder body 12, providing the pressure probe 13 with a precisely positioned and stable testing object, which is a prerequisite for ensuring the accuracy of hardness testing.

[0065] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A testing device for online hardness testing of steel cylinder body, comprising a testing frame (1), a conveying roller frame (11), and a steel cylinder body (12), wherein a pressure probe (13) is mounted on the top of the testing frame (1), and the pressure probe (13) is used to apply a preset clamping force to the steel cylinder body (12), characterized in that: The pressure assembly (2) includes a lifting frame (21) installed at the end of the conveying roller frame (11) and several support frames (22) fixedly connected to the top of the lifting frame (21). Each support frame (22) has two symmetrical centering rollers (23) installed on its top, and the outside of the centering rollers (23) is in partial contact with the surface of the cylinder body (12). Both sides of the lifting frame (21) are equipped with sliding push frames (26), and a first side pressure block (27) and two second side pressure blocks (28) are respectively installed on the corresponding side of the two sliding push frames (26). The lifting frame (21) and the testing frame (1) are respectively connected by two first telescopic cylinders (24) and two telescopic columns (25), and the telescopic columns (25) support the lifting frame (21) during the extension and retraction process; A depth adjustment assembly (3) is installed between each of the two sliding pushers (26) and the lifting frame (21), and the depth adjustment assembly (3) is used to keep the sliding pushers (26) in stable contact with the surface of the cylinder body (12); One of the sliding pushers (26) is provided with a double adjustment component (4) on one side, and the double adjustment component (4) is used to make the two second side pressure blocks (28) contact the surface of the cylinder body (12) at different positions; The lifting frame (21) is provided with a power component (5) on its exterior. The power component (5) is used to coarsely process the surface particles of the cylinder body (12) on the surface of the conveying roller frame (11) and the support frame (22) while driving the cylinder body (12) on the surface of the support frame (22) to rotate.

2. The online hardness testing device for steel cylinder bodies according to claim 1, characterized in that: The depth adjustment component (3) includes a pad (31) movably connected to the side of the lifting frame (21) near the sliding push frame (26). The sliding push frame (26) has two symmetrical centering slots (32) on the side near the pad (31). The two centering slots (32) and the pad (31) are connected together by two centering rods (33), and the sliding push frame (26) is connected to the pad (31) through the centering rods (33). Each of the centering rods (33) is fitted with a return spring (34), and the two ends of the return spring (34) are connected to the sliding push frame (26) and the pad (31) respectively. The pad (31) forms an elastic adaptive connection with the sliding push frame (26) through the return spring (34).

3. The online hardness testing device for steel cylinder bodies according to claim 2, characterized in that: A middle support plate (35) is connected between the sliding pusher (26) and the pad (31). An adjusting bolt (37) is screwed on the top of the middle support plate (35). Threaded holes (36) for the adjusting bolt (37) are opened on the middle support plate (35) and the lifting frame (21) respectively. An abutment ring (38) is installed on the outside of the adjusting bolt (37), and the top of the abutment ring (38) abuts against the bottom of the middle support plate (35).

4. The online hardness testing device for steel cylinder bodies according to claim 1, characterized in that: The dual-adjustment component (4) includes two limiting plates (43) fixedly connected to the top of two second side pressure blocks (28) and a servo motor (47) fixedly connected to the top of one of the sliding pushers (26). The output end of the servo motor (47) is fixedly connected to a connecting plate (46). Each of the two limiting plates (43) is equipped with a centering shaft (45) on one side, and the two centering shafts (45) are movably connected to one side of the connecting plate (46) with two arc strips (44), and the second side pressure block (28) is designed as a U-shaped structure.

5. The online hardness testing device for steel cylinder bodies according to claim 4, characterized in that: One of the sliding pushers (26) is also fixedly connected to a slider (41), and the two second side pressure blocks (28) are provided with a groove (42) for the slider (41) to be inserted on the side of one of the sliding pushers (26).

6. The online hardness testing device for steel cylinder bodies according to claim 1, characterized in that: The power assembly (5) includes a guide column (55), which is inserted into the interior of each support frame (22) from left to right. Each support frame (22) has a placement groove (51) at its top that communicates with its interior for guiding the rotation of two centering rollers (23). The placement groove (51) is internally connected to two symmetrical centering columns (52), and the centering roller (23) is fixedly sleeved on the outside of the centering column (52). The guide column (55) is fixedly sleeved with two first toothed rings (53) corresponding to the two centering columns (52), and a first toothed ring (54) is sleeved between the first toothed ring (53) and the centering column (52). The end of the guide column (55) is fixedly connected to a second toothed ring (56), and the side of the lifting frame (21) near the second toothed ring (56) is fixedly connected to a power motor (57), and the output end of the power motor (57) and the outside of the second toothed ring (56) are both fitted with a second toothed ring (58). The inside of the testing frame (1) is equipped with a stabilizing component (6) that cooperates with the centering roller (23). The stabilizing component (6) is used to quickly remove impurities from the surface of the cylinder body (12) so that the pressure probe (13) can apply stable pressure to any position on the surface of the cylinder body (12).

7. The online hardness testing device for steel cylinder bodies according to claim 6, characterized in that: The stabilizing component (6) includes a stabilizing frame (61) and a lower frame (62) respectively installed inside the testing frame (1). A grinding disc (65) is installed at the top of the stabilizing frame (61), and the grinding disc (65) and the cylinder body (12) are in an interleaved state. The top of the stabilizing frame (61) is fixedly connected to a second telescopic cylinder (63). The telescopic end of the second telescopic cylinder (63) is connected to a slide (64) together with the outside of the grinding disc (65). The top of the stabilizing frame (61) is provided with a guide frame opening (67) for guiding the slide (64) to move.

8. The online hardness testing device for steel cylinder bodies according to claim 7, characterized in that: A protective shell (66) is also installed on the outside of the slide (64). The protective shell (66) is fitted on the outside of the grinding disc (65), and there is a gap between the protective shell (66) and the grinding disc (65). An inclined thin air duct (68) is fixed on the side of the protective shell (66) near the grinding disc (65), and a blower (69) is installed on the top of the thin air duct (68).

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