A tensile and bending test device for welded steel plate

Abstract

This utility model discloses a tensile and bending test device for welded steel plates, including a housing with a cavity on the front side inside the housing and a pressure detector on the upper side inside the housing. It also includes a protective mechanism. The protective mechanism includes a protective plate, a mounting rod, a transmission plate, and a drive rod. The protective plate is slidably connected to a groove on the front side of the bottom wall of the cavity. A drive groove is provided on the upper side of the rear end of the protective plate. The mounting rod is rotatably connected to the left side of the rear wall of the cavity. A transmission plate is provided on the front side of the outer arc surface of the mounting rod, and a drive rod is provided on the right side of the transmission plate. The front end of the drive rod is located inside the drive groove. This tensile and bending test device for welded steel plates can adjust the position of the protective plate. After adjustment, the protective plate can be self-locked by a worm gear structure, solving the problem of safety accidents caused by the protective plate loosening and opening.

Description

Technical Field

[0001] This utility model relates to the technical field of welding quality testing equipment, specifically a tensile and bending test device for welded steel plates. Background Technology

[0002] Tensile and bending tests on welded steel plates are important means of evaluating welding quality. This equipment helps determine the mechanical properties of the weld joint, such as bending strength and ductility, thereby ensuring the quality and reliability of the weld joint. In the prior art, patent publication number CN 214010740 U discloses a tensile testing device for automotive steel leaf springs, including a workbench with multiple legs fixedly connected to its lower side and a support frame fixedly connected to its upper side. A hydraulic cylinder is fixedly connected to the upper side of the support frame, and the telescopic end of the hydraulic cylinder passes through the upper side of the support frame and is fixedly connected to a pressure plate. The upper side of the workbench is equipped with a protective mechanism for worker safety. This device allows the operator to pull the protective plate upwards using a handle. When the upper end of the protective plate contacts the top wall of the support frame, a mounting rod on the upper end of the protective plate passes through a mounting opening inside the support frame and extends... Extend the rod to the upper side of the support frame, then rotate it to misalign it with the mounting port. After misalignment, the rod cannot be pulled out through the mounting port, thus locking it in place. This method is rather cumbersome. In actual use, the rod needs to be precisely aligned with the fixing hole on the workbench and rotated into place to ensure that the protective plate is securely fixed. If the user lacks experience or operates improperly, the protective plate may not be securely fixed. If the protective plate is not securely fixed, it may loosen or even fall off during the test, increasing the risk of injury from flying debris. Therefore, we propose a tensile and bending test device for welded steel plates. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a tensile and bending test device for welded steel plates. Through the cooperation of the transmission plate and the drive rod, the position of the protective plate can be adjusted, thereby controlling the opening and closing of the box. After the position of the protective plate is adjusted, it can be self-locked by the worm gear structure, without the need to set up additional locking components. This solves the problem of safety accidents caused by the protective plate loosening and opening, and further improves the protective effect of the protective plate. It can effectively solve the problems in the background technology.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a tensile and bending test device for welded steel plates, comprising a box, a cavity provided on the front side of the box, a pressure detector provided on the upper side of the box, and a protective mechanism.

[0005] The protective mechanism includes a protective plate, a mounting rod, a transmission plate, and a drive rod. The protective plate is slidably connected to a groove on the front side of the cavity bottom wall. A drive groove is provided on the upper side of the rear end of the protective plate. The mounting rod is rotatably connected to the left side of the rear wall of the cavity. A transmission plate is provided on the front side of the outer arc surface of the mounting rod. A drive rod is provided on the right side of the transmission plate. The front end of the drive rod is located inside the drive groove. Through the cooperation of the transmission plate and the drive rod, the position of the protective plate can be adjusted, thereby controlling the opening and closing of the enclosure. After the position of the protective plate is adjusted, it can be self-locked by a worm gear structure, eliminating the need for additional locking components. This solves the problem of safety accidents caused by the protective plate loosening and opening, further improving the protective effect of the protective plate.

[0006] Furthermore, a controller is provided at the right end of the housing. The input terminal of the controller is electrically connected to an external power source, and the pressure detector is bidirectionally electrically connected to the controller, enabling the regulation of the electrical components inside the equipment.

[0007] Furthermore, the protective mechanism also includes guide slides and mounting plates. The guide slides are respectively disposed on the left and right sides inside the cavity. Mounting plates are slidably connected to the upper side of the outer arc surface of the guide slides. A protective plate is disposed between the opposite inner sides of the two mounting plates, which can adjust the position of the protective plate.

[0008] Furthermore, the protective mechanism also includes an observation window, which is located in the observation opening on the lower side of the front end of the protective plate, allowing observation of the experimental conditions inside the equipment.

[0009] Furthermore, a servo motor is provided on the upper side of the left wall of the cavity, a worm gear is provided on the right end of the output shaft of the servo motor, a worm wheel is provided on the rear side of the outer arc surface of the mounting rod, the worm gear is located on the lower side of the worm wheel, the worm gear and the worm wheel are meshed and connected, the input end of the servo motor is electrically connected to the output end of the controller, and can drive the transmission plate to rotate through the mounting rod.

[0010] Furthermore, a fixed seat is slidably connected to a guide groove in the middle of the bottom wall of the housing. A bidirectional screw is rotatably connected inside the guide groove. The fixed seat is threaded to the left and right sides of the outer arc surface of the bidirectional screw through a threaded hole on its lower right end. A bellows is provided between the relatively inner ends of the two fixed seats and between the end of the fixed seat away from the center of the housing and the inner wall of the guide groove. The bellows are respectively fitted onto the left and right sides and the middle of the bidirectional screw. A drive motor is provided on the lower right side of the housing. The left end of the output shaft of the drive motor is fixedly connected to the right end of the bidirectional screw. The input end of the drive motor is electrically connected to the output end of the controller, which can adjust the position of the fixed seat.

[0011] Furthermore, four fixing rods are respectively provided on the left and right sides of the top wall of the box. The lower ends of the four fixing rods are slidably connected to the corresponding sliding holes on the upper end of the connecting plate. Each fixing rod has a baffle at its lower end. A mounting seat is provided in the middle of the lower end of the connecting plate. Limit seats are slidably connected in the mounting grooves opened in the middle of the lower end of the mounting seat. The ends of the two limit seats near the center of the box are in contact with each other. An electric push rod is provided in the middle of the top wall of the box. A pressure detector is fixedly connected to the lower end of the telescopic end of the electric push rod. A probe is provided at the lower end of the pressure detector. The upper end of the connecting plate is fixedly connected to the lower end of the probe. The input end of the electric push rod is electrically connected to the output end of the controller, which can adjust the height of the limit seats.

[0012] Furthermore, it also includes a second bidirectional screw, a second bellows, and an adjusting motor. The second bidirectional screw is rotatably connected to the inside of the mounting groove. The limiting seats are threaded to the middle of the outer arc surface of the second bidirectional screw through the threaded holes on the upper right side of their respective limiting seats. The second bellows are respectively set between the relatively inner ends of the two limiting seats and between the end of the limiting seat away from the center of the housing and the inner wall of the mounting groove. The second bellows are respectively sleeved on the left and right sides and the middle of the outside of the second bidirectional screw. The adjusting motor is set at the right end of the mounting seat. The left end of the adjusting motor output shaft is fixedly connected to the right end of the second bidirectional screw. The input end of the adjusting motor is electrically connected to the output end of the controller, which can adjust the position of the limiting seats.

[0013] Furthermore, a pressure sensor is installed in the clearance groove on the front side of the bottom wall of the box. A second probe is installed at the upper end of the pressure sensor. The lower end of the protective plate corresponds vertically to the upper end of the second probe. The pressure sensor is bidirectionally electrically connected to the controller and can detect the position of the protective plate.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This tensile and bending test device for welded steel plates has the following advantages:

[0015] By coordinating the transmission plate and drive rod, the position of the protective plate can be adjusted, thereby controlling the opening and closing of the enclosure. After the position of the protective plate is adjusted, it can be self-locked by the worm gear structure, eliminating the need for additional locking components. This solves the problem of safety accidents caused by the protective plate loosening and opening, and further improves the protective effect of the protective plate. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the front sectional structure of the present invention;

[0018] Figure 3 This is a schematic diagram of the upper sectional structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the lower sectional structure of the present invention;

[0020] Figure 5 This is a schematic diagram of the internal structure of the cavity in this utility model;

[0021] Figure 6 This is a schematic diagram of the structure of the protective plate of this utility model;

[0022] Figure 7 This is a schematic diagram of the transmission plate of this utility model;

[0023] Figure 8 This is an enlarged structural diagram of point A in this utility model;

[0024] Figure 9 This is an enlarged structural diagram of section B of the present invention.

[0025] In the diagram: 1. Housing, 2. Controller, 3. Cavity, 4. Protective Mechanism, 41. Guide Slide Pillar, 42. Mounting Plate, 43. Protective Plate, 44. Observation Window, 45. Mounting Rod, 46. Transmission Plate, 47. Drive Rod, 5. Servo Motor, 6. Worm Gear, 7. Worm Wheel, 8. Fixed Seat, 9. Bellows I, 10. Bidirectional Screw I, 11. Drive Motor, 12. Fixed Rod, 13. Connecting Plate, 14. Electric Push Rod, 15. Pressure Detector, 16. Mounting Seat, 17. Limit Seat, 18. Bidirectional Screw II, 19. Bellows II, 20. Adjusting Motor, 21. Pressure Sensor. Detailed Implementation

[0026] 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.

[0027] Please see Figure 1-9 This embodiment provides a technical solution: a tensile and bending test device for welded steel plates, including a housing 1, a cavity 3 is provided on the front side of the housing 1, and a pressure detector 15 is provided on the upper side of the housing 1. The pressure applied to the welded steel plate is transmitted to the sensitive element inside the pressure detector 15. The change in pressure causes the resistance value of the sensitive element to change, and the change in resistance value causes the output voltage of the detection element to change. Then the pressure detector 15 measures the voltage signal. It also includes a protective mechanism 4.

[0028] Protective mechanism 4 includes a protective plate 43, a mounting rod 45, a transmission plate 46, and a drive rod 47. The protective plate 43 is slidably connected to a groove on the front side of the bottom wall of the cavity 3. A drive groove is provided on the upper side of the rear end of the protective plate 43. The mounting rod 45 is rotatably connected to the left side of the rear wall of the cavity 3. The transmission plate 46 is provided on the front side of the outer arc surface of the mounting rod 45. The drive rod 47 is provided on the right side of the transmission plate 46. The front end of the drive rod 47 is located inside the drive groove. The protective mechanism 4 also includes guide slides 41 and mounting plates 42. The guide slides 41 are respectively provided on the left and right sides inside the cavity 3. The upper side of the outer arc surface of the guide slides 41 is slidably connected to the mounting plates 42. A protective plate 43 is provided between the opposite inner sides of the two mounting plates 42. The protective mechanism 4 also includes an observation window 44, which is located in the observation opening on the lower side of the front end of the protective plate 43. During the rotation of the transmission plate 46, the drive rod 47 will rotate downward around the mounting rod 45. At this time, the drive rod 47 will slide inside the drive groove and rotate relative to the drive groove, so that the transmission plate 46 drives the protective plate 43 downward through the drive rod 47. The position of the protective plate 43 can be adjusted, thereby controlling the opening and closing of the box 1. After the position of the protective plate 43 is adjusted, it can be self-locked by the worm gear structure, without the need to set up additional locking components. This solves the problem of safety accidents caused by the protective plate 43 loosening and opening, and further improves the protective effect of the protective plate 43.

[0029] Among them: a controller 2 is set at the right end of the housing 1. The input end of the controller 2 is electrically connected to an external power supply. The pressure detector 15 is electrically connected to the controller 2 in both directions, which can regulate the electrical components inside the equipment.

[0030] The cavity 3 has a servo motor 5 on the upper side of its left wall, a worm gear 6 on the right end of its output shaft, and a worm wheel 7 on the rear side of the outer arc surface of the mounting rod 45. The worm gear 6 is located below the worm wheel 7 and is meshed with the worm wheel 7. The input end of the servo motor 5 is electrically connected to the output end of the controller 2. The servo motor 5 starts to run when controlled by the controller 2. The output shaft of the servo motor 5 drives the worm gear 6 to rotate. During the rotation, the worm gear 6 will drive the worm wheel 7 to rotate through the meshing connection. The worm wheel 7 will drive the transmission plate 46 to rotate through the mounting rod 45.

[0031] The bottom wall of housing 1 has a guide groove in the middle, in which fixed seats 8 are slidably connected. A double-acting screw 10 is rotatably connected inside the guide groove. The fixed seats 8 are threaded to the left and right sides of the outer arc surface of the double-acting screw 10 through threaded holes on their lower right ends. Corrugated pipes 9 are installed between the inner ends of the two fixed seats 8 and between the end of the fixed seat 8 away from the center of housing 1 and the inner wall of the guide groove. The corrugated pipes 9 are respectively fitted onto the left and right sides and the middle of the double-acting screw 10. A drive motor 11 is installed on the lower right side of housing 1. The left end of the output shaft of the drive motor 11 is fixedly connected to the right end of the double-acting screw 10. The input end of motor 11 is electrically connected to the output end of controller 2. The output shaft of motor 11 drives the bidirectional screw 10 to rotate. During the rotation, the bidirectional screw 10 moves the fixed seat 8 through the threaded connection. At this time, the corrugated pipe 9 in the middle will contract, and the corrugated pipes 9 on the left and right sides will extend. The corrugated pipe 9 can prevent the bidirectional screw 10 from directly contacting the external environment. During the movement of the fixed seat 8, the operator observes the scale line set at the bottom of the box 1. When the fixed seat 8 moves a distance equal to c, it means that the fixed seat 8 is in contact with the outer surface of the lower side of the welded steel plate, thereby fixing the lower end of the welded steel plate through the fixed seat 8.

[0032] Specifically: Fixing rods 12 are respectively installed on the left and right sides of the top wall of the housing 1. The lower ends of the four fixing rods 12 are slidably connected to the corresponding sliding holes on the upper end of the connecting plate 13. Each fixing rod 12 has a baffle at its lower end. A mounting seat 16 is installed in the middle of the lower end of the connecting plate 13. Limiting seats 17 are slidably connected to the mounting grooves in the middle of the lower end of the mounting seat 16. The ends of the two limiting seats 17 closest to the center of the housing 1 are in contact with each other. An electric push rod 14 is installed in the middle of the top wall of the housing 1. A pressure detector 15 is fixedly connected to the lower end of the telescopic end of the electric push rod 14. The pressure detector 15... A probe is provided at the lower end. The upper end of the connecting plate 13 is fixedly connected to the lower end of the probe. The input end of the electric push rod 14 is electrically connected to the output end of the controller 2. The electric push rod 14 starts to run through the control of the controller 2. The extension end of the electric push rod 14 drives the connecting plate 13 to move downward through the pressure detector 15. The connecting plate 13 will drive the limit seat 17 to move downward through the mounting seat 16. When the lower end of the limit seat 17 contacts the upper end of the welded part of the welded steel plate, the limit seat 17 will apply a downward pressure to the welded part. The pressure applied by the limit seat 17 to the welded steel plate will cause the welded steel plate to bend.

[0033] The system includes a second bidirectional screw 18, a second bellows 19, and an adjusting motor 20. The second bidirectional screw 18 is rotatably connected to the inside of the mounting groove. Limiting seats 17 are threaded to the middle of the outer arc surface of the second bidirectional screw 18 through threaded holes on their upper right ends. The second bellows 19 are respectively located between the opposite inner ends of the two limiting seats 17 and between the end of the limiting seat 17 furthest from the center of the housing 1 and the inner wall of the mounting groove. The second bellows 19 are respectively sleeved on the left and right sides and the middle of the outside of the second bidirectional screw 18. The adjusting motor 20 is located at the right end of the mounting base 16. The left end of the output shaft of the adjusting motor 20 is connected to the second bidirectional screw 18. The right end is fixedly connected, and the input end of the adjusting motor 20 is electrically connected to the output end of the controller 2. The output shaft of the adjusting motor 20 drives the bidirectional screw 18 to rotate. During the rotation, the bidirectional screw 18 will drive the limit seat 17 to move through the threaded connection. At this time, the bellows 19 in the middle contracts and the bellows 19 on the left and right sides extend. During the movement of the limit seat 17, the operator observes the scale line set at the front end of the mounting base 16. When the distance that the limit seat 17 moves is equal to e, it means that the limit seat 17 is in contact with the outer surface of the upper side of the welded steel plate, thereby fixing the upper end of the welded steel plate through the limit seat 17.

[0034] The pressure sensor 21 is installed in the clearance groove on the front side of the bottom wall of the housing 1. A probe 2 is installed on the upper end of the pressure sensor 21. The lower end of the protective plate 43 corresponds to the upper end of the probe 2. The pressure sensor 21 is bidirectionally electrically connected to the controller 2. When the lower end of the protective plate 43 contacts the probe of the pressure sensor 21, the protective plate 43 will apply pressure to the pressure sensor 21. This pressure will be transmitted to the sensitive element inside the pressure sensor 21. The change in pressure causes the resistance value of the sensitive element to change. The change in resistance value causes the output voltage of the detection element to change. Then the pressure sensor 21 measures the voltage signal. Then the pressure sensor 21 transmits the detected information to the controller 2 through the built-in data transmission module. The controller 2 receives the detected data through the built-in serial communication port. When the controller 2 receives this signal, it means that the lower end of the protective plate 43 extends into the clearance groove and the housing 1 is closed.

[0035] The working principle of the tensile and bending test device for welded steel plates provided by this utility model is as follows: During the bending test, the operator first places the welded steel plate on the upper end of two fixed seats 8 (the length of the welded steel plate is about twice the distance between the fixed seats 8), and positions the welded part of the welded steel plate below the limiting seat 17 (at this time, the two limiting seats 17 are in contact with each other, which can provide a downward pressure to the welded steel plate). Then, through the control of the controller 2, the servo motor 5 starts to run. The output shaft of the servo motor 5 drives the worm gear 6 to rotate. During the rotation, the worm gear 6 drives the worm wheel 7 to rotate through the meshing connection. The worm wheel 7 drives the transmission plate 4 through the mounting rod 45. 6. During rotation, the transmission plate 46 drives the drive rod 47 to rotate downwards around the mounting rod 45. At this time, the drive rod 47 slides inside the drive groove and rotates relative to it, causing the transmission plate 46 to drive the protective plate 43 downwards via the drive rod 47. When the lower end of the protective plate 43 contacts the probe of the pressure sensor 21, the protective plate 43 applies pressure to the pressure sensor 21. This pressure is transmitted to the sensitive element inside the pressure sensor 21. The change in pressure causes a change in the resistance value of the sensitive element, which in turn causes a change in the output voltage of the detection element. The pressure sensor 21 then measures the voltage signal and transmits the data through its built-in data transmission module. The measured information is transmitted to controller 2. Controller 2 receives the measured data through its built-in serial communication port. When controller 2 receives this signal, it indicates that the lower end of the protective plate 43 has reached the interior of the recess, the housing 1 is closed, and then, through the control of controller 2, the electric push rod 14 starts to operate. The extension end of the electric push rod 14 drives the connecting plate 13 to move downward through the pressure detector 15. The connecting plate 13 drives the limit seat 17 to move downward through the mounting seat 16. When the lower end of the limit seat 17 contacts the upper end of the welded joint of the welded steel plate, the limit seat 17 will apply a downward pressure to the welded joint. This pressure will be transmitted to the sensitive element inside the pressure detector 15. The change in pressure causes a change in the resistance value of the sensitive element. The change in value causes a change in the output voltage of the detection element. The pressure detector 15 then measures the voltage signal and transmits the detected information to the controller 2 via its built-in data transmission module. The controller 2 receives the detected data through its built-in serial communication port. The pressure applied to the welded steel plate by the limit seat 17 causes the welded steel plate to bend. During the experimental testing process, the operator can observe the experimental conditions inside the chamber 1 through the observation window 44 (the observation window 44 is made of explosion-proof glass, which has high strength and is not easily damaged by impact). When the weld of the welded steel plate bends to its limit and breaks, the operator can assess the bending strength of the welded steel plate based on the data provided by the pressure detector 15.During the bending test of the tensile and bending test device for welded steel plates, the operator first measures the width of the welded steel plate (e.g., 'a'), and then measures the distance between the two fixed seats 8 (e.g., 'b'). Subtracting the width of the welded steel plate from the distance between the two fixed seats 8 and dividing by 2 gives the distance the fixed seats 8 need to move (e.g., 'c', c = (a') ÷ 2). Then, through the control of the controller 2, the motor 20 starts running. The output shaft of the motor 20 drives the bidirectional screw 18 to rotate. During rotation, the bidirectional screw 18 moves the limit seat 17 via a threaded connection. At this time, the central bellows 19 extends, and the bellows 19 on the left and right sides contract. The bellows 19 can... To prevent the bidirectional screw 18 from directly contacting the external environment, the two limit seats 17 are separated. The distance between the two limit seats 17 after separation is measured (e.g., d). The distance between the two limit seats 17 is subtracted from the width of the welding steel plate and then divided by 2 to obtain the distance the limit seat 17 needs to move (e.g., e = (da) ÷ 2). The welding steel plate is then placed in the middle of the bottom wall of the housing 1. Then, through the control of the controller 2, the drive motor 11 and the regulating motor 20 start running. The output shaft of the drive motor 11 drives the bidirectional screw 10 to rotate. During rotation, the bidirectional screw 10 moves the fixed seat 8 through the threaded connection. At this time, the bellows 9 in the middle retracts, and the bellows 9 on the left and right sides retract. The bellows 9 can prevent the bidirectional screw 10 from directly contacting the external environment. During the movement of the fixed seat 8, the operator observes the scale line set on the bottom of the housing 1. When the fixed seat 8 moves a distance equal to c, it means that the fixed seat 8 is in contact with the outer surface of the lower side of the welded steel plate, thereby fixing the lower end of the welded steel plate through the fixed seat 8. At the same time, the output shaft of the adjusting motor 20 drives the bidirectional screw 18 to rotate. During the rotation of the bidirectional screw 18, it will drive the limit seat 17 to move through the threaded connection. At this time, the bellows 19 in the middle retracts, and the bellows 19 on the left and right sides extend. During the movement of the limit seat 17, the operator observes the scale line set on the front end of the mounting seat 16. When the limit seat 17 moves... When the moving distance is equal to e, it means that the limit seat 17 is in contact with the outer surface of the upper side of the welded steel plate, thereby fixing the upper end of the welded steel plate through the limit seat 17. Then the protective plate 43 is closed. The working principle of closing the protective plate 43 is the same as above. After the protective plate 43 is closed, the electric push rod 14 starts to run through the control of the controller 2. The extension end of the electric push rod 14 drives the connecting plate 13 to move upward through the pressure detector 15. The connecting plate 13 will drive the limit seat 17 to move upward through the mounting seat 16. The limit seat 17 will give the welded steel plate an upward pulling force. The pressure detector 15 will detect this pulling force. The detection principle is the same as above. Then the pressure detector 15 will transmit the detection information to the controller 2 through the built-in data transmission module.The controller 2 receives the detected data through its built-in serial communication port. The tension applied to the welded steel plate by the limit seat 17 causes the welded steel plate to stretch. During the testing process, the operator can observe the experimental situation inside the chamber 1 through the observation window 44. When the weld of the welded steel plate is stretched to its limit and breaks, the operator can evaluate the tensile strength of the welded steel plate based on the data provided by the pressure detector 15.

[0036] It is worth noting that the controller 2 disclosed in the above embodiments can be an AT89C51, the servo motor 5 can be an ECMA-C20604RS, the drive motor 11 and the regulating motor 20 can be 5IK200A-AF, the electric actuator 14 can be a dytp2000-550 / 50-x, the pressure detector 15 can be a Honeywell lPX2, and the pressure sensor 21 can be an OHR-M2. The controller 2 controls the operation of the servo motor 5, the drive motor 11, the electric actuator 14, the pressure detector 15, the regulating motor 20, and the pressure sensor 21 using methods commonly used in the prior art.

[0037] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A tensile and bending test device for welded steel plates, comprising a housing (1), a cavity (3) provided on the front side inside the housing (1), and a pressure detector (15) provided on the upper side inside the housing (1), characterized in that: It also includes protective mechanisms (4); Protective mechanism (4): It includes a protective plate (43), a mounting rod (45), a transmission plate (46) and a drive rod (47). The protective plate (43) is slidably connected to the sliding groove provided on the front side of the bottom wall of the cavity (3). A drive groove is provided on the upper side of the rear end of the protective plate (43). The mounting rod (45) is rotatably connected to the left side of the rear wall of the cavity (3). The transmission plate (46) is provided on the front side of the outer arc surface of the mounting rod (45). A drive rod (47) is provided on the right side of the transmission plate (46) when it is activated. The front end of the drive rod (47) is located inside the drive groove.

2. The apparatus for testing the tensile and bending properties of a welded steel sheet according to claim 1, wherein: A controller (2) is provided at the right end of the housing (1). The input end of the controller (2) is electrically connected to an external power source. The pressure detector (15) is electrically connected to the controller (2) in both directions.

3. The tensile and bending test apparatus for welded steel plates according to claim 1, characterized in that: The protective mechanism (4) also includes guide slides (41) and mounting plates (42). The guide slides (41) are respectively located on the left and right sides inside the cavity (3). Mounting plates (42) are slidably connected to the upper side of the outer arc surface of the guide slides (41). A protective plate (43) is provided between the relative inner sides of the two mounting plates (42).

4. The apparatus for testing the tensile and bending properties of a welded steel sheet according to claim 1, wherein: The protective mechanism (4) also includes an observation window (44), which is located in the observation opening on the lower side of the front end of the protective plate (43).

5. The apparatus for testing the tensile and bending properties of a welded steel sheet according to claim 2, wherein: A servo motor (5) is provided on the upper side of the left wall of the cavity (3). A worm (6) is provided on the right end of the output shaft of the servo motor (5). A worm wheel (7) is provided on the rear side of the outer arc surface of the mounting rod (45). The worm (6) is located on the lower side of the worm wheel (7). The worm (6) and the worm wheel (7) are meshed and connected. The input end of the servo motor (5) is electrically connected to the output end of the controller (2).

6. The apparatus for testing the tensile and bending properties of a welded steel sheet according to claim 2, wherein: Fixed seats (8) are slidably connected in the guide groove provided in the middle of the bottom wall of the box (1). A bidirectional screw (10) is rotatably connected inside the guide groove. The fixed seats (8) are threaded to the left and right sides of the outer arc surface of the bidirectional screw (10) through the threaded hole provided on the lower right side of their respective fixed ends. Corrugated pipes (9) are provided between the relatively inner ends of the two fixed seats (8) and between the end of the fixed seat (8) away from the center of the box (1) and the inner wall of the guide groove. Corrugated pipes (9) are respectively sleeved on the left and right sides and the middle of the outside of the bidirectional screw (10). A drive motor (11) is provided on the lower right side of the box (1). The left end of the output shaft of the drive motor (11) is fixedly connected to the right end of the bidirectional screw (10). The input end of the drive motor (11) is electrically connected to the output end of the controller (2).

7. The apparatus for testing the tensile and bending properties of a welded steel sheet according to claim 2, wherein: Fixed rods (12) are respectively provided on the left and right sides of the top wall of the box (1). The lower ends of the four fixed rods (12) are slidably connected to the sliding holes corresponding to the upper end of the connecting plate (13). The lower ends of the fixed rods (12) are all provided with baffles. The middle part of the lower end of the connecting plate (13) is provided with a mounting seat (16). The mounting groove opened in the middle part of the lower end of the mounting seat (16) is slidably connected with a limit seat (17). The two limit seats (17) are in contact with each other at the end near the center of the box (1). An electric push rod (14) is provided in the middle of the top wall of the box (1). The lower end of the telescopic end of the electric push rod (14) is fixedly connected with a pressure detector (15). The lower end of the pressure detector (15) is provided with a probe. The upper end of the connecting plate (13) is fixedly connected to the lower end of the probe. The input end of the electric push rod (14) is electrically connected to the output end of the controller (2).

8. The apparatus according to claim 7, wherein: It also includes a bidirectional screw (18), a bellows (19), and an adjusting motor (20). The bidirectional screw (18) is rotatably connected to the inside of the mounting groove. The limiting seat (17) is threaded to the middle of the outer arc surface of the bidirectional screw (18) through the threaded hole on the upper right side of its respective. The bellows (19) is respectively set between the relative inner ends of the two limiting seats (17) and between the end of the limiting seat (17) away from the center of the box (1) and the inner wall of the mounting groove. The bellows (19) is respectively sleeved on the left and right sides and the middle of the outside of the bidirectional screw (18). The adjusting motor (20) is set at the right end of the mounting seat (16). The left end of the output shaft of the adjusting motor (20) is fixedly connected to the right end of the bidirectional screw (18). The input end of the adjusting motor (20) is electrically connected to the output end of the controller (2).

9. The tensile and bending test apparatus for welded steel plates according to claim 2, characterized in that: A pressure sensor (21) is installed in the clearance groove on the front side of the bottom wall of the box (1). A probe 2 is installed at the upper end of the pressure sensor (21). The lower end of the protective plate (43) corresponds to the upper end of the probe 2. The pressure sensor (21) is bidirectionally electrically connected to the controller (2).

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