Steel bar bending tester

Abstract

The utility model relates to the technical field of reinforcing steel bar detection, in particular to a reinforcing steel bar bending tester which is characterized in that a reinforcing steel bar is placed on the inner side of a supporting arm, a handle screw rod I on the outer side of a supporting frame is manually rotated, so that a positioning sliding block is close to the inner side of the bottom of the supporting arm, and the reinforcing steel bar is clamped; then a stepping motor is started, and the positive bending test of the reinforcing steel bar is completed under the joint cooperation of the working roller and the bending core; during reverse bending, a larger bending core is inserted into the inserting hole, the thrust oil cylinder is controlled, the supporting arm on the outer side abuts against the bending core, then a forward bending steel bar is placed between the two sets of working rollers, a second handle screw is rotated, a pressing plate moves downwards and fully abuts against the top face of the steel bar, and the stable limiting effect during forward bending and reverse bending is achieved through the device; the rebars are prevented from bouncing.

Description

Technical Field

[0001] This application relates to the technical field of steel bar detection, and particularly to a steel bar bending testing machine. Background Art

[0002] A steel bar bending testing machine is a process equipment for cold bending tests and plane reverse bending tests of steel bars. It can be widely used in enterprises such as iron and steel metallurgy, steel frame structures, precast components, etc., as well as units such as quality supervision institutes and engineering quality inspection stations. It is an ideal test equipment indispensable for testing the cold bending performance and reverse bending performance of threaded steel bars.

[0003] After retrieval, the publication number: CN216870238U discloses a steel bar bending testing machine. When adjusting the angle of the steel bar on the turntable, manually rotate the worm, the worm drives the worm wheel to rotate, the worm wheel drives the clamp to rotate through the connecting rod between the worm wheel and the clamp, and the clamp drives the steel bar to move. Since the worm wheel and the worm have self-locking properties, rotating the worm can indirectly fix the position of the steel bar, thereby accurately determining the position of the steel bar. Press the pressing block against the steel bar, and then tighten the pressing bolt so that the pressing bolt is fixed on the positioning block, thereby realizing the relative fixation of the steel bar and the clamp.

[0004] Regarding the above related technologies, the inventor believes that there are the following technical defects to be improved:

[0005] For the reverse bending test detection of steel bars, it is necessary to place the positively bent steel bar perpendicular to the central core block, and place the working roll close to the inner side of the bend. This device generally has a general limiting effect on the steel bar during the reverse bending test, and the central core block is not easy to replace, so it is not convenient to firmly clamp steel bars of different sizes. Summary of the Utility Model

[0006] This application provides a steel bar bending testing machine to improve the following technical problems:

[0007] For the reverse bending test detection of steel bars, it is necessary to place the positively bent steel bar perpendicular to the central core block, and place the working roll close to the inner side of the bend. The traditional device generally has a general limiting effect on the steel bar during the reverse bending test, and the central core block is not easy to replace, so it is not convenient to firmly clamp steel bars of different sizes.

[0008] This application provides a steel bar bending testing machine, adopting the following technical solutions:

[0009] A steel bar bending testing machine includes a high-efficiency bending testing mechanism, which includes a support platform, a testing machine body, a support arm, a positioning shaft, a support frame, a turntable, a bending core and a movable component. The testing machine body is threadedly connected to one side of the top of the support platform, one end of the support arm is rotatably connected to the outer wall surface of the positioning shaft, the support frame is fixedly connected to the bottom of the positioning shaft, the turntable is rotatably connected to one side of the support platform, the bending core is inserted in the middle of the turntable, the movable component is arranged inside the support frame, and a clamping portion is also arranged on one side of the support arm.

[0010] In an achievable technical solution of the present application, the clamping portion includes a thrust cylinder, a push rod, a connecting plate and a hinged ear plate, the piston end of the thrust cylinder is fixedly connected to one end of the push rod, the connecting plate is fixedly connected to the outer side of the push rod, and the inner side of the hinged ear plate is hinged to the outer side of the connecting plate.

[0011] In an achievable technical solution of the present application, the movable component includes a handle screw rod 1, a positioning slider, a working roller, a frame, a handle screw rod 2 and a pressure plate. The handle screw rod 1 passes through the interior of the positioning slider and is threadedly connected to the inner wall of the positioning slider. The positioning slider is slidably sleeved inside the support frame. The working roller is fixedly connected to one side of the top of the positioning slider. The frame is fixedly connected to the top of the working roller. The handle screw rod 2 passes through the top of the frame and is rotatably connected to the middle of the top end of the pressure plate. The bottom of the pressure plate is against the surface of the external steel bar.

[0012] In an achievable technical solution of the present application, a slide groove matching the size of the positioning slide block is further provided inside the support frame.

[0013] In a feasible technical solution of the present application, a plurality of groups of annularly distributed clearance holes are provided on the top of the turntable.

[0014] In an achievable technical solution of the present application, a dust cover, a stepper motor and a drive shaft are also provided at the bottom of the turntable. The dust cover is fixedly connected to the bottom of the support platform, the motor shaft of the stepper motor is fixedly connected to the bottom of the drive shaft through a coupling, and the drive shaft passes through the interior of the support platform and is fixedly connected to the bottom end of the turntable.

[0015] In a feasible technical solution of the present application, a socket is further provided in the middle of the turntable.

[0016] In summary, the present application includes at least one of the following beneficial technical effects:

[0017] 1. In the positive bending adjustment, the steel bar can be placed inside the support arm. When a person rotates the handle screw on the outside of the support frame, since the positioning slider is embedded inside the chute, the positioning slider is hindered from rotating. With the cooperation of the lead screw, the positioning slider can drive the working roller on the outside of the top towards the positioning shaft, so that the working roller and the support arm in the direction of the positioning shaft clamp the surface of the steel bar. Then, another working roller is inserted into the inside of the turntable along the relief hole. This working roller should be located on the outside of the upper end of the steel bar and the support arm. Then, start the stepping motor inside the dust cover. Its motor shaft drives the turntable to rotate through the drive shaft, and then the steel bar is bent along the outer wall of the bending core. During this process, the working roller and the support arm firmly clamp the surface of the steel bar, preventing the steel bar from bouncing off the working roller and avoiding injury to the equipment and the staff.

[0018] 2. In the reverse bending test, a larger bending core can be inserted along the inside of the slot. Control the propulsion oil cylinder, and its piston end pushes the push rod. The push rod drives the connecting plate on the outside to move outward along the central axis of the hinge ear plate, so that the outer support arm abuts against the bending core. Then, place the positively bent steel bar between the two groups of working rollers, adjust the distance of the positioning slider to be perpendicular to the central axis of the bending core, and then place another group of working rollers in the appropriate relief hole for reverse bending. To prevent the steel bar from bouncing during reverse bending, the staff can rotate the handle screw two. As the screw of the handle thread two gradually extends, its bottom pushes the pressure plate. The pressure plate moves smoothly downward along the limit slot on the inside of the frame and fully abuts against the top surface of the steel bar, preventing the steel bar from bouncing, thus ensuring the safety performance of the device during the reverse bending test. Description of the Drawings

[0019] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0020] Figure 1 It is a schematic structural diagram of the steel bar bending testing machine in the embodiment of the present application.

[0021] Figure 2 It is an abutment effect diagram of the support arm in the embodiment of the present application.

[0022] Figure 3 It is a sectional view inside the support frame in the embodiment of the present application.

[0023] Figure 4 It is a schematic structural diagram of the connection between the frame and the pressure plate in the embodiment of the present application.

[0024] Figure 5 It is a sectional view inside the dust cover in the embodiment of the present application.

[0025] Description of the reference numerals:

[0026] 1. High-efficiency bending test mechanism; 2. Clamping part; 3. Slide groove; 4. Relief hole; 5. Dust cover; 6. Stepper motor; 7. Driving shaft; 8. Jack; 9. Limit groove; 11. Support platform; 12. Testing machine body; 13. Support arm; 14. Positioning shaft; 15. Support frame; 16. Turntable; 17. Bending core; 18. Movable component; 21. Propelling oil cylinder; 22. Push rod; 23. Connecting plate; 24. Hinged ear plate; 181. First handle screw; 182. Positioning slider; 183. Working roll; 184. Frame; 185. Second handle screw; 186. Pressure plate. Detailed implementation manners

[0027] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer and more understandable, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0028] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0029] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0030] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality of" means two or more unless otherwise specifically defined.

[0031] The following further describes the present application in detail with reference to the Figures 1-5 accompanying drawings.

[0032] An embodiment of the present application discloses a steel bar bending testing machine. Refer to Figures 1-5, the steel bar bending testing machine includes an efficient bending test mechanism 1. The efficient bending test mechanism 1 includes a support table 11, a testing machine body 12, a support arm 13, a positioning shaft 14, a support frame 15, a turntable 16, a bending core 17 and a movable component 18. The testing machine body 12 is threadedly connected to one side of the top of the support table 11. One end of the support arm 13 is rotatably connected to the outer wall surface of the positioning shaft 14. The support frame 15 is fixedly connected to the bottom of the positioning shaft 14. The turntable 16 is rotatably connected to one side of the support table 11. The bending core 17 is inserted into the middle of the turntable 16. The movable component 18 is arranged inside the support frame 15. A clamping portion 2 is also arranged on one side of the support arm 13.

[0033] The clamping portion 2 includes a propulsion oil cylinder 21, a push rod 22, a connecting plate 23 and a hinged ear plate 24. The piston end of the propulsion oil cylinder 21 is fixedly connected to one end of the push rod 22. The connecting plate 23 is fixedly connected to the outside of the push rod 22. The inner side of the hinged ear plate 24 is hinged to the outer side of the connecting plate 23.

[0034] The movable component 18 includes a first handle screw 181, a positioning slider 182, a working roller 183, a frame 184, a second handle screw 185 and a pressing plate 186. The first handle screw 181 passes through the inside of the positioning slider 182 and is threadedly connected to the inner wall of the positioning slider 182. The positioning slider 182 is slidably sleeved inside the support frame 15. The working roller 183 is fixedly connected to one side of the top of the positioning slider 182. The frame 184 is fixedly connected to the top of the working roller 183. The second handle screw 185 passes through the top of the frame 184 and is rotatably connected to the middle of the top end of the pressing plate 186. The bottom of the pressing plate 186 abuts against the surface of the external steel bar.

[0035] A chute 3 matching the size of the positioning slider 182 is also arranged inside the support frame 15.

[0036] A number of annularly distributed relief holes 4 are formed in the top of the turntable 16.

[0037] A dust cover 5, a stepping motor 6 and a drive shaft 7 are also arranged at the bottom of the turntable 16. The dust cover 5 is fixedly connected to the bottom of the support table 11. The motor shaft of the stepping motor 6 is fixedly connected to the bottom of the drive shaft 7 through a coupling. The drive shaft 7 passes through the inside of the support table 11 and is fixedly connected to the bottom end of the turntable 16.

[0038] A jack 8 is also arranged in the middle of the turntable 16.

[0039] The specific product model of the testing machine body 12 is: GW-40C steel bar testing machine.

[0040] The use process of the steel bar bending testing machine in the embodiment of the present application is roughly as follows:

[0041] Place the steel bar inside the inner side of the support arm 13. Manually rotate the handle screw 181 on the outer side of the support frame 15 to make the positioning slider 182 approach the inner side of the bottom of the support arm 13 and complete the clamping of the steel bar. Insert another working roller 183 into the inside of the turntable 16 along the upper end relief hole 4. Then start the stepping motor 6, and complete the positive bending test of the steel bar under the combined action of the working roller 183 and the bending core 17. When performing reverse bending, insert a larger bending core 17 into the inside of the insertion hole 8, control the propulsion oil cylinder 21 to make the outer support arm 13 abut against the bending core 17. Then place the positively bent steel bar between the two groups of working rollers 183. Then rotate the handle screw 185, and the pressing plate 186 moves downward and fully abuts against the top surface of the steel bar, so that the device achieves a stable limiting effect during positive bending and reverse bending, preventing the steel bar from bouncing up.

[0042] The beneficial technical effects of the steel bar bending testing machine according to the embodiments of the present application are generally as follows:

[0043] Under the cooperation of the lead screw, the positioning slider 182 can drive the working roller 183 on the outer side of the top to approach the positioning shaft 14, so that the working roller 183 and the support arm 13 in the direction of the positioning shaft 14 complete the clamping effect on the surface of the steel bar. Then insert another working roller 183 into the inside of the turntable 16 along the relief hole 4. This working roller 183 should be located on the outer side of the upper end of the steel bar and the support arm 13. Then start the stepping motor 6 inside the dust cover 5, and its motor shaft drives the turntable 16 to rotate through the drive shaft 7, and then the steel bar is twisted along the outer wall of the bending core 17. During this process, the working roller 183 and the support arm 13 complete the firm clamping of the surface of the steel bar, preventing the steel bar from bouncing up from the working roller 183 and avoiding accidental injury to the equipment and staff. Control the propulsion oil cylinder 21, its piston end pushes the push rod 22, and the push rod 22 drives the outer connecting plate 23 to move outward along the central axis of the hinge ear plate 24, so that the outer support arm 13 abuts against the bending core 17. Then place the positively bent steel bar between the two groups of working rollers 183, adjust the distance of the positioning slider 182 to be perpendicular to the central axis of the bending core 17. Then place another group of working rollers 183 in the appropriate relief hole 4 for reverse bending. To prevent the steel bar from bouncing up during reverse bending, the staff can rotate the handle screw 185. As the screw of the handle thread 185 gradually extends, its bottom pushes the pressing plate 186, and the pressing plate 186 moves smoothly downward along the limiting groove 9 inside the frame 184 and fully abuts against the top surface of the steel bar, preventing the steel bar from bouncing up, so as to ensure the safety performance of the device during the reverse bending test.

[0044] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the application shall be included in the protection scope of the present application.

Claims

1. A steel bar bending testing machine, characterized in that, Comprising an efficient bending test mechanism (1), the efficient bending test mechanism (1) includes a support table (11), a testing machine body (12), a support arm (13), a positioning shaft (14), a support frame (15), a turntable (16), a bending core (17) and a movable component (18). The testing machine body (12) is threadedly connected to one side of the top of the support table (11). One end of the support arm (13) is rotatably connected to the outer wall surface of the positioning shaft (14). The support frame (15) is fixedly connected to the bottom of the positioning shaft (14). The turntable (16) is rotatably connected to one side of the support table (11). The bending core (17) is inserted into the middle of the turntable (16). The movable component (18) is arranged inside the support frame (15). A clamping portion (2) is further arranged on one side of the support arm (13).

2. The steel bar bending testing machine according to claim 1, wherein, The clamping portion (2) includes a propulsion oil cylinder (21), a push rod (22), a connecting plate (23) and a hinged ear plate (24). The piston end of the propulsion oil cylinder (21) is fixedly connected to one end of the push rod (22). The connecting plate (23) is fixedly connected to the outside of the push rod (22). The inner side of the hinged ear plate (24) is hinged to the outer side of the connecting plate (23).

3. The steel bar bending testing machine according to claim 1, characterized in that, The movable component (18) includes a first hand-operated screw rod (181), a positioning slider (182), a working roller (183), a frame (184), a second hand-operated screw rod (185) and a pressing plate (186). The first hand-operated screw rod (181) passes through the inside of the positioning slider (182) and is threadedly connected to the inner wall of the positioning slider (182). The positioning slider (182) is slidably sleeved inside the support frame (15). The working roller (183) is fixedly connected to one side of the top of the positioning slider (182). The frame (184) is fixedly connected to the top of the working roller (183). The second hand-operated screw rod (185) passes through the top of the frame (184) and is rotatably connected to the middle of the top end of the pressing plate (186). The bottom of the pressing plate (186) abuts against the surface of the external steel bar.

4. The steel bar bending testing machine according to claim 3, characterized in that, A chute (3) matching the size of the positioning slider (182) is further arranged inside the support frame (15).

5. The steel bar bending testing machine according to claim 1, characterized in that, A number of groups of annularly distributed relief holes (4) are opened on the top of the turntable (16).

6. The steel bar bending testing machine according to claim 5, wherein, A dust cover (5), a stepping motor (6) and a drive shaft (7) are further arranged at the bottom of the turntable (16). The dust cover (5) is fixedly connected to the bottom of the support table (11). The motor shaft of the stepping motor (6) is fixedly connected to the bottom of the drive shaft (7) through a coupling. The drive shaft (7) passes through the inside of the support table (11) and is fixedly connected to the bottom end of the turntable (16).

7. The steel bar bending testing machine according to claim 6, characterized in that, A jack (8) is further arranged in the middle of the turntable (16).

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