A corrosion resistance testing device for workpieces

Abstract

The utility model discloses a kind of workpiece corrosion resistance test devices, including corrosion testing machine and the test box of its top, the fixed mechanism is equipped in the inside cavity both sides of test box, back is equipped with side push subassembly;Fixed mechanism is driven in and out by electric push rod driving connecting cover, connecting cover side is rotatably connected with rotary plate, and rotary plate is connected with mounting plate through fixed column;Adjustable rotating disc that can rotate is equipped between mounting plate and clamping plate, and adjusting rotating disc is matched with the sliding column on clamping plate through its arc groove, and driving moving block and extruding plate realize workpiece radial clamping;Hydraulic cylinder in connecting cover can push the connecting plate of ball block, make ball block movement along guide cylinder inner helical groove, and then convert into to workpiece exerting torque;Side push subassembly is pushed by electric push rod and is pushed to the lateral pressure of push plate with pressure sensor is exerted.The utility model can simultaneously realize the corrosion test of axial clamping, lateral extrusion and torque loading multiple stress state, significantly improve the authenticity of test condition and data comprehensiveness.

Description

Technical Field

[0001] This utility model relates to the field of workpiece corrosion resistance testing technology, specifically a workpiece corrosion resistance testing device. Background Technology

[0002] Most commonly known corrosion resistance testing devices are static immersion or salt spray test chambers, whose main function is to provide a corrosive environment, but they cannot apply controllable mechanical loads to the samples that conform to actual working conditions; although some advanced equipment can achieve simple tensile testing, their functions are still relatively limited. CN222144818U discloses a testing device for the corrosion resistance of reinforcing bars, including a test bench. A control panel is fixedly installed on the front of the test bench, and several environmental simulation mechanisms are installed on the top of the test bench. Each environmental simulation mechanism has a clamping mechanism inside, and a stress loading mechanism is provided on one side of each mechanism. The clamping mechanism includes a clamping body, with a limiting component and a bottom support plate connected to the inner wall of the clamping body. A limiting plate is fitted onto the limiting component and the bottom support plate, and a first lead screw is threaded onto the limiting component. This device has the advantage of simulating actual working conditions and solves the problem that existing testing devices for the corrosion resistance of reinforcing bars are inconvenient to apply stress to the tested reinforcing bars during use, making it difficult to reflect the corrosion effect of the reinforcing bars under actual use conditions and hindering the accurate evaluation of the corrosion resistance of the reinforcing bars. However, this patent still has the following problems in actual use: However, the above-mentioned devices can only achieve the tensile effect and are difficult to simulate the complex multiaxial stress state in actual engineering, such as simultaneously bearing axial compressive stress, radial lateral thrust stress and torsional load. This means that the existing test data has limitations and cannot fully and realistically reflect the corrosion behavior of materials in complex service environments.

[0003] A workpiece corrosion resistance testing device is proposed to address the problems mentioned above. Utility Model Content

[0004] The purpose of this invention is to provide a workpiece corrosion resistance testing device to solve the problem mentioned in the background art. However, the above-mentioned devices can only achieve tensile effects and are difficult to simulate complex multiaxial stress states in actual engineering, such as simultaneously bearing axial compressive stress, radial lateral thrust stress and torsional load. This means that the existing test data has limitations and cannot fully and realistically reflect the corrosion behavior of materials in complex service environments.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a workpiece corrosion resistance testing device, comprising a corrosion testing machine, wherein a base and a test chamber are fixedly installed on the top surface of the corrosion testing machine, and a test cavity is provided inside the test chamber; The test cavity is symmetrically provided with fixing mechanisms on both sides, and the test box is provided with a side-pushing component on the back. The fixing mechanism includes a first electric actuator, the output end of which is fixedly connected to a connecting cover. A rotating plate is rotatably connected to one side of the opening of the connecting cover. A fixing post is fixedly connected to the edge of the rotating plate. A mounting plate is fixedly connected to the end of the fixing post away from the rotating plate. An adjusting disc is attached to the surface of the mounting plate. Several bolts are threaded to the edge of the mounting plate. A clamping plate is fixedly connected to the bolts. The adjusting disc is located between the mounting plate and the clamping plate. The connecting cover has a hydraulic cylinder fixedly connected inside, the output end of the hydraulic cylinder is fixedly connected to a connecting plate, the rotating plate has a guide cylinder fixedly connected to the middle of the side near the connecting cover, and the piston rod of the first electric push rod is covered with a first bellows cover.

[0006] Preferably, the first electric actuator is fixedly connected to the test box, a servo motor is fixedly connected to the middle of the side of the mounting plate near the rotating plate, a protective cover is fitted over the servo motor, and the output end of the servo motor is fixedly connected to the adjusting disc, a plurality of arc grooves are evenly formed on the surface of the adjusting disc, a plurality of guide grooves are evenly formed on the surface of the clamping plate, a moving block is slidably connected inside the guide groove, a stud is threaded through the middle of the moving block, a pressing plate is rotatably connected to one end of the stud, a nut is fixedly connected to the other end of the stud, a plurality of ball blocks are fixedly connected to the outer side of the connecting plate, a plurality of spiral grooves are evenly formed on the inner sidewall of the guide cylinder, a sliding column is fixedly connected to the side of the clamping plate near the adjusting disc, and bent guide columns are slidably connected through both sides of the connecting plate, with one end of the bent guide column fixedly connected to the inside of the connecting cover.

[0007] Preferably, the output end of the servo motor rotates through the middle of the mounting plate, the protective cover is fixedly connected to the mounting plate, the sliding column is slidably connected to the arc groove, and the stud is located at one end of the moving block near the center of the clamping plate.

[0008] Preferably, the ball block is slidably connected to the spiral groove, the guide cylinder is located inside the connecting cover, one end of the first bellows cover is fixedly connected to the outside of the piston rod of the first electric push rod, and the other end of the first bellows cover is fixedly connected to the inner wall of the corrosion testing machine.

[0009] Preferably, the side-push assembly includes a second electric push rod, which is fixed to the back of the test box. A second bellows cover is fitted over the piston rod of the second electric push rod. A mounting cover is fixedly connected to the output end of the second electric push rod. A pressure sensor is fixedly connected inside the mounting cover. The mounting end of the pressure sensor is connected through the mounting cover, and a push plate is threadedly fixed to the mounting end of the pressure sensor.

[0010] Preferably, one end of the second bellows cover is fixedly connected to the outside of the piston rod of the second electric actuator, and the other end of the second bellows cover is fixedly connected to the inner wall of the test chamber.

[0011] Preferably, the number of arc grooves and guide grooves is the same, and not less than 3.

[0012] Compared with the prior art, the beneficial effects of this utility model are: This workpiece corrosion resistance testing device integrates radial clamping, lateral extrusion, and rotational torque loading into a single fixing mechanism, enabling the simulation of corrosion environments under various complex stress states on a workpiece in one device, greatly improving testing efficiency and the comprehensiveness of data. The specific details are as follows: 1. The fixing mechanism integrates electric and hydraulic drives with a sophisticated mechanical structure, resulting in significant advantages: First, it achieves multi-level, multi-dimensional automated clamping and loading of the workpiece. By using a servo motor to drive the adjustment disc and sliding column, the magnitude and stroke of the radial clamping force can be precisely controlled, achieving initial and reliable fixation of the workpiece. Second, this mechanism far exceeds the traditional single clamping function. Through a hydraulic cylinder driving the connecting plate and ball block, the movement of the ball block within the spiral groove converts linear thrust into rotational torque, actively applying an adjustable torsional load to the clamped workpiece. This expands the workpiece testing state from static tension / compression to dynamic torque simulation, greatly enriching the testing conditions. Third, the protective cover ensures the safety of the drive components, and the bellows cover effectively isolates the corrosive environment, jointly guaranteeing the long-term accuracy and durability of this complex mechanism under harsh testing conditions. Ultimately, this significantly improves the accuracy, comprehensiveness, and engineering practical value of corrosion test data.

[0013] 2. The side-push assembly specifically simulates the lateral stress or accidental impact experienced by the workpiece in a complex assembly. It provides stable axial thrust through a second electric actuator, and the magnitude of the lateral compressive force is monitored and fed back in real time by a pressure sensor. This achieves precise digital control and repeatability of the lateral loading force, ensuring the scientific nature and consistency of the test conditions. When used in conjunction with the fixing mechanism, the workpiece is simultaneously subjected to a combined stress state of axial clamping and radial compression. This allows for a profound understanding of the impact of multi-directional stress coupling on the corrosion rate and crack initiation and propagation of materials, which is impossible for traditional corrosion testing equipment with single-direction loading. This greatly expands the testing range and provides key data for evaluating the durability of materials under extremely complex working conditions, enhancing the overall performance and application potential of the entire testing device. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the front structure of this utility model; Figure 2 This is a schematic diagram of the cross-sectional structure of the test chamber; Figure 3This is a schematic diagram of the installation structure of the fixing mechanism; Figure 4 A schematic diagram of the mounting plate, adjusting disc, and clamping plate; Figure 5 This is a schematic diagram of the cross-sectional structure of the connecting cover; Figure 6 This is a schematic diagram of the installation structure of the side-push assembly.

[0015] In the diagram: 1. Corrosion testing machine; 101. Base; 102. Test chamber; 1021. Test cavity; 103. Control console; 2. Fixing mechanism; 201. First electric actuator; 202. Connecting cover; 203. Rotating plate; 204. Fixing column; 205. Mounting plate; 2051. Servo motor; 2052. Protective cover; 206. Adjusting disc; 2061. Arc groove; 207. Bolt; 208. Clamping plate; 2081. Lead-in... 2082. Guide groove; 2083. Moving block; 2084. Stud; 2085. Extrusion plate; 2086. Nut; 2087. Sliding column; 209. Hydraulic cylinder; 210. Guide tube; 2101. Spiral groove; 211. Connecting plate; 2111. Ball block; 212. First bellows cover; 3. Side push assembly; 301. Second electric push rod; 302. Mounting cover; 303. Pressure sensor; 304. Push plate; 305. Second bellows cover. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figures 1-6 The present invention provides a technical solution: a workpiece corrosion resistance testing device, including a corrosion testing machine 1, a base 101 and a test box 102 fixedly installed on the top surface of the corrosion testing machine 1, and a test cavity 1021 opened inside the test box 102; The test cavity 1021 is symmetrically provided with fixing mechanisms 2 on both sides, and the test box 102 is provided with a side push assembly 3 on the back. The fixing mechanism 2 includes a first electric actuator 201. A connecting cover 202 is fixedly connected to the output end of the first electric actuator 201. A rotating plate 203 is rotatably connected to one side of the opening of the connecting cover 202. A fixing post 204 is fixedly connected to the edge of the rotating plate 203. A mounting plate 205 is fixedly connected to the end of the fixing post 204 away from the rotating plate 203. An adjusting disc 206 is attached to the surface of the mounting plate 205. Several bolts 207 are threadedly connected to the edge of the mounting plate 205. A clamping plate 208 is fixedly connected to the bolts 207. The adjusting disc 206 is located on the mounting plate 205. Between 05 and clamping plate 208; wherein, a hydraulic cylinder 209 is fixedly connected inside the connecting cover 202, and a connecting plate 211 is fixedly connected to the output end of the hydraulic cylinder 209; a guide cylinder 210 is fixedly connected to the middle of the side of the rotating plate 203 near the connecting cover 202; a first bellows cover 212 is sleeved on the outside of the piston rod of the first electric push rod 201; the helix angle of the helical groove 2101 is fixed, so that there is a certain transmission ratio between the thrust output by the piston rod of the hydraulic cylinder 209 and the torque finally acting on the workpiece, so the torque can be controlled by controlling the hydraulic cylinder 209.

[0018] The first electric actuator 201 is fixedly connected to the test box 102. A servo motor 2051 is fixedly connected to the middle of the side of the mounting plate 205 near the rotating plate 203. A protective cover 2052 is fitted over the servo motor 2051, and the output end of the servo motor 2051 is fixedly connected to the adjusting disc 206. Several arc grooves 2061 are evenly formed on the surface of the adjusting disc 206. Several guide grooves 2081 are evenly formed on the surface of the clamping plate 208. A moving block 2082 is slidably connected inside the guide groove 2081. A stud 2083 is threaded through the middle of the moving block 2082. One end of stud 2083 is rotatably connected to an extrusion plate 2084, and the other end of stud 2083 is fixedly connected to a nut 2085. Several ball blocks 2111 are fixedly connected to the outer side of connecting plate 211. Several spiral grooves 2101 are evenly opened on the inner side wall of guide cylinder 210. A sliding column 2086 is fixedly connected to the side of clamping plate 208 near adjusting disc 206. Bending guide columns are slidably connected through both sides of connecting plate 211. One end of the bending guide column is fixedly connected to the inside of connecting cover 202. The output end of servo motor 2051 rotates through the middle of mounting plate 205. Protective cover 2052 and mounting plate 2051 are connected through the middle of mounting plate 205. Mounting plate 205 is fixedly connected; sliding column 2086 is slidably connected to arc groove 2061; ball block 2111 is slidably connected to spiral groove 2101; guide cylinder 210 is located inside connecting cover 202; one end of first bellows cover 212 is fixedly connected to the outside of piston rod of first electric push rod 201; the other end of first bellows cover 212 is fixedly connected to inner wall of corrosion testing machine 1; protective cover 2052 prevents corrosive gas from entering; output shaft of servo motor 2051 passes through the middle of mounting plate 205 through coupling and is fixedly connected to the center of adjustment disc 206; the edges of mounting plate 205 are evenly circumferentially connected. The connecting plate 211 has four threaded holes, with bolts 207 threadedly connected to it. The ends of the bolts 207 are fixedly connected to an annular clamping plate 208 by threads. Two bent guide posts are symmetrically slidably connected to both sides of the connecting plate 211. One end of the bent guide post is fixedly connected to the internal frame of the connecting cover 202 by welding, which determines the linear movement mode of the connecting plate 211. At the same time, the guide cylinder 210 can extend into the interior of the connecting cover 202. The inner wall of the guide cylinder 210 is machined with a spiral groove 2101 that matches the ball block 2111. The first bellows cover 212 protects the piston rod of the first electric push rod 201.

[0019] The side-push assembly 3 includes a second electric actuator 301, which is fixed to the back of the test chamber 102. A second bellows cover 305 is fitted over the piston rod of the second electric actuator 301. A mounting cover 302 is fixedly connected to the output end of the second electric actuator 301. A pressure sensor 303 is fixedly connected inside the mounting cover 302. The mounting end of the pressure sensor 303 is connected through the mounting cover 302, and a push plate 304 is threadedly fixed to the mounting end of the pressure sensor 303. One end of the second bellows cover 305 is fixedly connected to the outside of the piston rod of the second electric actuator 301, and the other end of the second bellows cover 305 is fixedly connected to the inner wall of the test chamber 102. Its output end is fixedly connected to a mounting cover 302 via a flange. The inside of the mounting cover 302 is connected to the pressure sensor 303 via screws, and the sensing end of the pressure sensor 303 is fixed to the push plate 304 via threads. Similarly, the second bellows cover 305 is used to protect the second electric actuator 301.

[0020] The number of arc grooves 2061 and guide grooves 2081 is the same, and not less than 3.

[0021] Working principle: Before using this workpiece corrosion resistance testing device, it is necessary to check the overall condition of the device to ensure it can operate normally. Figure 1 - Figure 6 As shown, firstly, the first electric actuator 201 is activated, its piston rod extends, pushing the entire fixing mechanism 2 towards the workpiece, causing the clamping plates 208 on both sides to come close to the ends of the workpiece. Then, the servo motor 2051 is activated, driving the adjusting disc 206 to rotate. The arc groove 2061 on the surface of the adjusting disc rotates accordingly, and the groove wall presses the sliding column 2086 to fix it to the clamping plate. Since the movement of the sliding column is restricted within the guide groove 2081 opened on the clamping plate 208, the rotational motion of the disc is converted into the precise linear motion of the moving block 2082 along the guide groove. The moving block drives the pressing plate 2084 at its end forward, thereby radially clamping the workpiece from the end of the workpiece, completing the initial fixing of the workpiece. The protective cover 2052 effectively protects the servo motor, preventing the intrusion of corrosive atmospheres and ensuring its long-term operational reliability.

[0022] After the workpiece is radially clamped, the first stage of corrosion resistance testing can begin, which tests the corrosion performance of the workpiece under axial compressive stress.

[0023] To further simulate complex working conditions, the side push assembly 3 can be activated: the second electric push rod 301 can be activated to push the mounting cover 302 and the push plate 304 on it forward, applying a compressive force to the workpiece from the radial direction, usually the side. The magnitude of this force is monitored and fed back in real time by the pressure sensor 303, thereby achieving precise force control loading and testing the corrosion resistance of the workpiece under simultaneous axial and radial compressive stress.

[0024] Finally, to test the corrosion of the workpiece under torsional load, the hydraulic cylinder 209 can be activated. Its piston rod pushes the connecting plate 211 to make a short linear motion inside the guide cylinder 210. The ball block 2111 fixed on the outside of the connecting plate slides in the spiral groove 2101 on the inner wall of the guide cylinder 210. Since the ball block is pushed by the connecting plate and the shape of the spiral groove is fixed, the sliding of the ball block along the spiral groove will force the guide cylinder 210 to rotate. Since the guide cylinder is fixedly installed on the rotating plate 203, the rotating plate will drive the entire mounting plate 205 and clamping plate 208 mechanism to rotate together through the fixed column 204, thereby applying a torque to the end of the clamped workpiece, so that the workpiece is under torsional load. Corrosion resistance tests conducted under these conditions can simulate the real corrosion environment of parts such as threaded fasteners that operate under stress in an extremely realistic manner. The first bellows cover 212 and the second bellows cover 305 effectively protect the piston rods of the first and second electric actuators throughout the process, preventing corrosive media from damaging precision moving parts and greatly extending the service life of the equipment.

[0025] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A workpiece corrosion resistance testing device, comprising a corrosion testing machine (1), wherein a base (101) and a test chamber (102) are fixedly installed on the top surface of the corrosion testing machine (1), and a test cavity (1021) is provided inside the test chamber (102). Its features are, Also includes: The test cavity (1021) is symmetrically provided with fixing mechanisms (2) on both sides, and the test box (102) is provided with a side push assembly (3) on the back. The fixing mechanism (2) includes a first electric actuator (201), the output end of which is fixedly connected to a connecting cover (202), a rotating plate (203) is rotatably connected to the opening side of the connecting cover (202), a fixing post (204) is fixedly connected to the edge of the rotating plate (203), a mounting plate (205) is fixedly connected to the end of the fixing post (204) away from the rotating plate (203), an adjusting disc (206) is attached to the surface of the mounting plate (205), a plurality of bolts (207) are threadedly connected to the edge of the mounting plate (205), a clamping plate (208) is fixedly connected to the bolts (207), and the adjusting disc (206) is located between the mounting plate (205) and the clamping plate (208). The connecting cover (202) is fixedly connected to a hydraulic cylinder (209), the output end of the hydraulic cylinder (209) is fixedly connected to a connecting plate (211), the rotating plate (203) is fixedly connected to a guide cylinder (210) in the middle of the side near the connecting cover (202), and the piston rod of the first electric push rod (201) is covered with a first bellows cover (212).

2. The workpiece corrosion resistance testing device according to claim 1, characterized in that: The first electric actuator (201) is fixedly connected to the test box (102). A servo motor (2051) is fixedly connected to the middle of the side of the mounting plate (205) near the rotating plate (203). A protective cover (2052) is fitted over the servo motor (2051), and the output end of the servo motor (2051) is fixedly connected to the adjusting disc (206). Several arc grooves (2061) are evenly opened on the surface of the adjusting disc (206). Several guide grooves (2081) are evenly opened on the surface of the clamping plate (208). A moving block (2082) is slidably connected inside the guide groove (2081). A stud (2083) is threaded through the middle. One end of the stud (2083) is rotatably connected to an extrusion plate (2084). The other end of the stud (2083) is fixedly connected to a nut (2085). Several balls (2111) are fixedly connected to the outer side of the connecting plate (211). Several spiral grooves (2101) are evenly opened on the inner side wall of the guide cylinder (210). A sliding column (2086) is fixedly connected to the side of the clamping plate (208) near the adjusting disc (206). Bending guide columns are slidably connected through both sides of the connecting plate (211). One end of the bending guide column is fixedly connected to the inside of the connecting cover (202).

3. The workpiece corrosion resistance testing device according to claim 2, characterized in that: The output end of the servo motor (2051) rotates through the middle of the mounting plate (205), the protective cover (2052) is fixedly connected to the mounting plate (205), the sliding column (2086) is slidably connected to the arc groove (2061), and the stud (2083) is located at one end of the moving block (2082) near the center of the clamping plate (208).

4. The workpiece corrosion resistance testing device according to claim 2, characterized in that: The ball block (2111) is slidably connected to the spiral groove (2101), the guide tube (210) is located inside the connecting cover (202), one end of the first bellows cover (212) is fixedly connected to the outside of the piston rod of the first electric push rod (201), and the other end of the first bellows cover (212) is fixedly connected to the inner wall of the corrosion testing machine (1).

5. The workpiece corrosion resistance testing device according to claim 1, characterized in that: The side-push assembly (3) includes a second electric push rod (301), which is fixed to the back of the test box (102). A second bellows cover (305) is fitted on the outside of the piston rod of the second electric push rod (301). A mounting cover (302) is fixedly connected to the output end of the second electric push rod (301). A pressure sensor (303) is fixedly connected inside the mounting cover (302). The mounting end of the pressure sensor (303) is connected through the mounting cover (302), and a push plate (304) is threadedly fixed to the mounting end of the pressure sensor (303).

6. The workpiece corrosion resistance testing device according to claim 5, characterized in that: One end of the second bellows cover (305) is fixedly connected to the outside of the piston rod of the second electric push rod (301), and the other end of the second bellows cover (305) is fixedly connected to the inner wall of the test box (102).

7. The workpiece corrosion resistance testing device according to claim 2, characterized in that: The number of the arc grooves (2061) and the guide grooves (2081) are the same and not less than 3.

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