CN218271772U

CN218271772U - Reinforcing bar toughness check out test set

Info

Publication number: CN218271772U
Application number: CN202222507578.9U
Authority: CN
Inventors: 朱少旬; 逄恒增; 苑燕明; 朱晓
Original assignee: Qingdao Runyang Inspection And Testing Co ltd
Current assignee: Qingdao Runyang Inspection And Testing Co ltd
Priority date: 2022-09-21
Filing date: 2022-09-21
Publication date: 2023-01-10
Anticipated expiration: 2032-09-21

Abstract

The utility model relates to a technical field of steel bar toughness test, especially relate to a steel bar toughness check out test set, it stimulates two fastener through two stretching devices, carry out tensile test to the reinforcing bar, control the mobile device, with support propelling movement to the intermediate position, control the decline of bending test device and carry out bending test to the reinforcing bar, can carry out tensile test and bending test to the reinforcing bar through the equipment, reduced the complex operation degree, improved the equipment functionality, reduced the area of many equipment, reduced use cost, improved the practicality product, reduced use cost, improved the practicality; the device comprises a support, a base, two stretching devices, two fastening devices, a moving device, a support, a bending test device, a fastening device base, a moving block and a clamping groove, wherein the bottom end of the base is connected with the top end of the support, the two stretching devices are oppositely installed on the top end of the base, the two fastening devices are respectively installed on the two stretching devices in a sliding mode, and the moving device is fixedly installed on the top end of the base.

Description

Reinforcing bar toughness check out test set

Technical Field

The utility model relates to a reinforcing bar toughness test's technical field especially relates to a reinforcing bar toughness check out test set.

Background

The reinforcing steel bar toughness detection equipment is an auxiliary device for reinforcing steel bar toughness detection, and is widely used in the field of reinforcing steel bar toughness tests; the existing steel bar toughness detection equipment comprises tensile test equipment and bending test equipment; when the existing steel bar toughness detection equipment is used, two ends of a steel bar are fixed in tensile test equipment, two sides of the steel bar are stretched through power equipment, whether the test requirements are met or not is judged, two ends of the steel bar are fixed in bending test equipment, the middle end position of the steel bar is pressed through a pressing block, and whether the steel bar cracks or not in a certain angle is judged; the existing steel bar toughness detection equipment is found in use, the steel bar toughness test needs to carry out a tensile test and a bending test on a steel bar, and generally, two types of equipment on the market are independent equipment, so that the intensification degree is too high, the use cost is large, the two pieces of equipment need to be operated manually, the operation is complex, the occupied area is too large, and the practicability is not high.

SUMMERY OF THE UTILITY MODEL

For solving the technical problem, the utility model provides a through two fastener of two stretching device stimulations, carry out tensile test to the reinforcing bar, control mobile device, with support propelling movement to intermediate position, control bending test device descends and carries out bending test to the reinforcing bar, can carry out tensile test and bending test to the reinforcing bar through equipment, the complex operation degree has been reduced, the equipment functionality has been improved, the area of multiple equipment has been reduced, use cost is reduced, the practicality product is improved, use cost is reduced, the reinforcing bar toughness check out test set of practicality has been improved.

The utility model discloses a reinforcing bar toughness check out test set, including support, base, two stretching devices, two fastener, mobile device, support, bending test device, fastener base, movable block and draw-in groove, the base bottom is connected with the support top, two stretching devices are installed on the base top in opposite directions, two fastener slide mounting respectively on two stretching devices, mobile device fixed mounting is on the base top, the support fixed mounting is on mobile device, bending test device fixed mounting is on the support, the fastener base suit is on the base top, be provided with the movable block on the fastener base front side wall, be provided with the draw-in groove on the movable block; the moving block is opened through the clamping groove, the two ends of a steel bar needing to be subjected to a toughness test are clamped and fixed through the two fastening devices respectively, after the fixing is completed, the two stretching devices are opened, the two fastening devices are pulled through the two stretching devices, the steel bar is subjected to a tensile test, the deformation generated by the steel bar in the stretching process is observed, whether the test requirements are met is judged through an external pressure sensor, after the tensile test is completed, the two fastening devices are loosened, the steel bar is taken out, the two ends of another steel bar are fixed through the two fastening devices, the moving device is controlled, the support is pushed to the middle position, the bending test device is controlled to descend to carry out the bending test on the steel bar, whether the test requirements are met is judged through the external gravity sensor, the tensile test and the bending test can be carried out on the steel bar through one device, the complex operation degree is reduced, the device functionality is improved, the occupied area of multiple devices is reduced, the use cost is reduced, and the practicability is improved.

Preferably, the fastening device comprises a fastening device base, two moving blocks, two clamping grooves, a positive and negative threaded rod and a rotating wheel, the fastening device base is slidably mounted on the stretching device, two sliding grooves are formed in the fastening device base, the two moving blocks are respectively provided with the clamping grooves, the bottoms of the two moving blocks are provided with sliding blocks, the two moving blocks are oppositely slidably mounted on the two sliding grooves through the sliding blocks, internal threads are respectively arranged on the two moving blocks, the input end of the positive and negative threaded rod is rotatably mounted on the front side wall of the fastening device base, the output end of the positive and negative threaded rod penetrates through the internal threads of the two moving blocks to be rotatably mounted on the rear side wall of the fastening device base, the positive and negative threaded rod is provided with a positive thread section and a negative thread section, the two moving blocks are respectively slidably mounted on the positive and negative thread section and the negative thread section, the internal threads on the two moving blocks are respectively in transmission with the positive and negative thread threads on the positive and negative threaded rod, and the rotating wheel is arranged on the input end of the positive and negative threaded rod; placing reinforcing bar one end that will need to be experimental in two movable blocks, clockwise rotation runner, drive positive and negative tooth screw rod clockwise turning, internal thread screw thread transmission through positive and negative tooth screw rod clockwise turning and two movable blocks drives two movable blocks and is close to the slip each other, press from both sides tight fastening to the reinforcing bar through the draw-in groove on two movable blocks, experimental completion back, counter-clockwise turning runner, drive positive and negative tooth screw rod counter-clockwise turning, it slides outwards to drive two movable blocks through the internal thread screw-thread fit with two movable blocks, take out the reinforcing bar, through the cooperation of positive and negative tooth screw rod and two movable blocks, can realize pressing from both sides tight fixed to the reinforcing bar through the control runner, improve the stability that presss from both sides tight to the reinforcing bar through two draw-in grooves, can adapt to the reinforcing bar of multiple different specifications, the equipment use limitation has been reduced, improve experimental stability, the practicality has been improved.

Preferably, the stretching device comprises a stretching device base, a strip-shaped chute, a first hydraulic cylinder base, a first hydraulic cylinder fixed end and a first hydraulic cylinder moving end, the bottom end of the stretching device base is connected with the top end of the base, the top end of the stretching device base is provided with the strip-shaped chute, the bottom end of the fastening device base is provided with a strip-shaped sliding block, the fastening device base is slidably mounted on the strip-shaped chute through the strip-shaped sliding block, the bottom end of the first hydraulic cylinder base is fixedly mounted on the side wall of the stretching device base, the bottom end of the first hydraulic cylinder fixed end is fixedly mounted on the top end of the first hydraulic cylinder base, the other end of the first hydraulic cylinder fixed end is connected with one end of the first hydraulic cylinder moving end, and the other end of the first hydraulic cylinder moving end is connected with the side wall of the fastening device base; fix the reinforcing bar both ends through two fastener, remove two fastener edgewise spouts of end pulling through two first pneumatic cylinders and remove backward in step, carry out tensile test to the reinforcing bar through two stretching device pulling reinforcing bar together, can improve tensile strength, applicable in the tensile test of the major diameter reinforcing bar of various differences, the suitability is stronger, and experimental stability is higher.

Preferably, the mobile device comprises a first base of the mobile device, a bearing base, a servo motor, a first screw, a first trapezoidal sliding block, a second base of the mobile device, a rotating shaft, a second screw, a second trapezoidal sliding block, a belt pulley and a belt, wherein the bottom end of the first base of the mobile device is fixedly arranged at the top end of the base, two trapezoidal sliding grooves are arranged at the top end of the first base of the mobile device, the bearing base is fixedly arranged at the top end of the first base of the mobile device, the servo motor is fixedly arranged on the left side wall of the first base of the mobile device, the output end of the servo motor penetrates through the left side wall of the first base of the mobile device to be concentrically connected with the input end of the first screw, the other end of the first screw penetrates through the bearing base to be rotatably arranged on the right side wall of the first base of the mobile device, an internal thread is arranged on the first trapezoidal sliding block, the first trapezoidal sliding block penetrates through the first screw to be slidably arranged on the two trapezoidal sliding grooves, the first screw is in threaded transmission with internal threads of a first trapezoidal sliding block, the bottom end of a second base of the mobile device is fixedly arranged at the top end of the base, two second trapezoidal sliding grooves are formed in the top end of the second base of the mobile device, a rotating shaft input end is rotatably arranged on the left side wall of the second base of the mobile device, a rotating shaft output end is concentrically connected with the second screw input end, the other end of the second screw is rotatably arranged on the right side wall of the second base of the mobile device, internal threads are formed in the second trapezoidal sliding block, the second trapezoidal sliding block is slidably arranged on the two second trapezoidal sliding grooves through the second screw, the second screw is in threaded transmission with the internal threads of the second trapezoidal sliding block, belt pulleys are concentrically arranged on an output end of a servo motor and the output end of the rotating shaft, a belt is tensioned and sleeved on the second bases of the two mobile devices, and a support is fixedly arranged at the top ends of the first screw and the second trapezoidal sliding block; the servo motor is started, the servo motor drives the belt pulley on the output end and the first screw to rotate, the belt pulley on the output end of the servo motor drives the belt pulley on the output end of the rotating shaft to rotate through a belt, the rotating shaft and the second screw are further driven to rotate through the first screw and the second screw, internal thread transmission of the first trapezoidal slider and the second trapezoidal slider is matched respectively, the first trapezoidal slider and the second trapezoidal slider are driven to move left and right along the first trapezoidal chute and the second trapezoidal chute, the support and the bending test device are further driven to move left and right, the support and the bending test device can be moved to one side when a tensile test is carried out, the support and the bending test device are moved to the middle position to carry out a test when a bending test is carried out, meanwhile, the position of the bending test device can be accurately adjusted through controlling the servo motor, the position of the bending test device can be adjusted according to test requirements of different reinforcing steel bars, the applicability of equipment is improved, multiple use requirements can be met, and limitation of the use of the equipment is reduced.

Preferably, the bending test device comprises a second hydraulic cylinder fixing end, a second hydraulic cylinder moving end, a connecting seat and a pressing block, wherein the bottom end of the second hydraulic cylinder fixing end is fixedly arranged at the bottom end of the support, the other end of the second hydraulic cylinder fixing end is connected with one end of the second hydraulic cylinder moving end, one end of the second hydraulic cylinder moving end is connected with the top end of the connecting seat, and the pressing block is fixedly arranged at the bottom end of the connecting seat; after adjusting to suitable experimental position through the mobile device, control second pneumatic cylinder stiff end makes second pneumatic cylinder remove the end and promotes connecting seat and briquetting, makes the briquetting push down the reinforcing bar that needs carry out bending test, makes the reinforcing bar produce the displacement, through observing the deformation of reinforcing bar and whether have the fracture, judges whether satisfy experimental requirement, can change the belt pulley according to the specification of different reinforcing bars, improve equipment convenience in use, improve experimental accurate nature.

Preferably, the inner wall of the clamping groove is provided with sponge; through the arrangement, the damage to equipment caused by fragments generated when the reinforcing steel bar is broken when the reinforcing steel bar is subjected to a toughness test can be avoided, and the service life of the equipment is prolonged.

Preferably, the clamping groove is made of rubber; through the setting, the friction force when the reinforcing steel bar is clamped can be enhanced, the reinforcing steel bar is prevented from sliding easily, test failure is caused, sufficient friction force is provided for the reinforcing steel bar and a reinforcing steel bar part during the test, and the accuracy and the stability of the test are ensured.

Compared with the prior art, the beneficial effects of the utility model are that: open the movable block through the draw-in groove, the reinforcing bar both ends that will carry out toughness test are pressed from both sides tightly fixedly through two fastener respectively, after fixed the completion, open two stretching device, stimulate two fastener through two stretching device, carry out tensile test to the reinforcing bar, deformation through observing reinforcing bar production in the tensile process, whether the pressure sensor through the external world judges to meet experimental requirement, after tensile test, loosen two fastener, take out the reinforcing bar, it is fixed through two fastener with another reinforcing bar both ends, control mobile device, with support propelling movement to intermediate position, control bending test device descends and carries out bending test to the reinforcing bar, whether judge to meet experimental requirement through external gravity sensor, can carry out tensile test and bending test to the reinforcing bar through an equipment, the complex operation degree has been reduced, the device functionality has been improved, the area of many devices has been reduced, use cost is reduced, and practicability is improved.

Drawings

FIG. 1 is a schematic view of a cross-sectional axial structure of the present invention;

FIG. 2 is an enlarged schematic view of the stretching assembly and the fastening assembly;

FIG. 3 is an enlarged schematic view of the moving device and the bending test device;

FIG. 4 is a schematic view of the axial measurement structure of the present invention;

in the drawings, the reference numbers: 1. a support; 2. a base; 3. a stretching device; 4. a fastening device; 5. a mobile device; 6. a support; 7. a bending test device; 8. a fastening device base; 9. a moving block; 10. a card slot; 11. a screw with positive and negative teeth; 12. a rotating wheel; 13. a stretching device base; 14. a strip-shaped chute; 15. a first hydraulic cylinder base; 16. a first hydraulic cylinder fixing end; 17. a first hydraulic cylinder moving end; 18. a mobile device first base; 19. a bearing base; 20. a servo motor; 21. a first screw; 22. a first trapezoidal slider; 23. a mobile device second base; 24. a rotating shaft; 25. a second screw; 26. a second trapezoidal slider; 27. a pulley; 28. a belt; 29. the fixed end of the second hydraulic cylinder; 30. a second hydraulic cylinder moving end; 31. a connecting seat; 32. and (7) briquetting.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

The utility model discloses a reinforcing bar toughness check out test set, including support 1, base 2, two stretching devices 3, two fastener 4, mobile device 5, support 6, bending test device 7, fastener base 8, movable block 9 and draw-in groove 10, base 2 bottom is connected with support 1 top, two stretching devices 3 opposite direction are installed at base 2 top, two fastener 4 are respectively slidable mounting on two stretching devices 3, mobile device 5 is fixed mounting on base 2 top, support 6 is fixed mounting on mobile device 5, bending test device 7 is fixed mounting on support 6, fastener base 8 suit is on base 2 top, be provided with movable block 9 on the fastener base 8 front side wall, be provided with draw-in groove 10 on movable block 9; the fastening device 4 comprises a fastening device base 8, two moving blocks 9, two clamping grooves 10, a positive and negative threaded rod 11 and a rotating wheel 12, the fastening device base 8 is slidably mounted on the stretching device 3, two sliding grooves are formed in the fastening device base 8, the clamping grooves 10 are formed in the two moving blocks 9 respectively, a sliding block is arranged at the bottom of each moving block 9, the two moving blocks 9 are slidably mounted on the two sliding grooves in opposite directions through the sliding block, internal threads are formed in the two moving blocks 9, the input ends of the positive and negative threaded rod 11 are rotatably mounted on the front side wall of the fastening device base 8, the output ends of the positive and negative threaded rod 11 penetrate through the internal threads of the two moving blocks 9 and are rotatably mounted on the rear side wall of the fastening device base 8, a positive thread section and a negative thread section are arranged on the positive and negative threaded rod 11, the two moving blocks 9 are slidably mounted on the positive thread section and the negative thread section respectively, the internal threads on the two moving blocks 9 are in transmission with the positive and negative thread threads on the positive and negative threaded rod 11 respectively, and the input ends of the positive and negative threaded rod 11 are provided with the rotating wheel 12; the stretching device 3 comprises a stretching device base 13, a strip-shaped chute 14, a first hydraulic cylinder base 15, a first hydraulic cylinder fixed end 16 and a first hydraulic cylinder moving end 17, the bottom end of the stretching device base 13 is connected with the top end of the base 2, the top end of the stretching device base 13 is provided with the strip-shaped chute 14, the bottom end of the fastening device base 8 is provided with a strip-shaped sliding block, the fastening device base 8 is slidably mounted on the strip-shaped chute 14 through the strip-shaped sliding block, the bottom end of the first hydraulic cylinder base 15 is fixedly mounted on the side wall of the stretching device base 13, the bottom end of the first hydraulic cylinder fixed end 16 is fixedly mounted on the top end of the first hydraulic cylinder base 15, the other end of the first hydraulic cylinder fixed end 16 is connected with one end of the first hydraulic cylinder moving end 17, and the other end of the first hydraulic cylinder moving end 17 is connected with the side wall of the fastening device base 8; the mobile device 5 comprises a first mobile device base 18, a bearing base 19, a servo motor 20, a first screw 21, a first trapezoidal sliding block 22, a second mobile device base 23, a rotating shaft 24, a second screw 25, a second trapezoidal sliding block 26, a belt pulley 27 and a belt 28, wherein the bottom end of the first mobile device base 18 is fixedly arranged at the top end of the base 2, two trapezoidal sliding grooves are formed in the top end of the first mobile device base 18, the bearing base 19 is fixedly arranged at the top end of the first mobile device base 18, the servo motor 20 is fixedly arranged on the left side wall of the first mobile device base 18, the output end of the servo motor 20 penetrates through the left side wall of the first mobile device base 18 to be concentrically connected with the input end of the first screw 21, the other end of the first screw 21 penetrates through the bearing base 19 to be rotatably arranged on the right side wall of the first mobile device base 18, internal threads are formed in the first trapezoidal sliding block 22, the first trapezoidal sliding block 22 passes through the first screw 21 and is slidably mounted on two trapezoidal sliding grooves, the first screw 21 is in threaded transmission with the internal thread of the first trapezoidal sliding block 22, the bottom end of the second base 23 of the mobile device is fixedly mounted at the top end of the base 2, two second trapezoidal sliding grooves are arranged at the top end of the second base 23 of the mobile device, the input end of the rotating shaft 24 is rotatably mounted on the left side wall of the second base 23 of the mobile device, the output end of the rotating shaft 24 is concentrically connected with the input end of the second screw 25, the other end of the second screw 25 is rotatably mounted on the right side wall of the second base 23 of the mobile device, the second trapezoidal sliding block 26 is provided with internal threads, the second trapezoidal sliding block 26 passes through the second screw 25 and is slidably mounted on the two second trapezoidal sliding grooves, the second screw 25 is in threaded transmission with the internal thread of the second trapezoidal sliding block 26, belt pulleys 27 are concentrically arranged at the output end of the servo motor 20 and the output end of the rotating shaft 24, a belt 28 is tightly sleeved on the second bases 23 of the two moving devices, and the support 6 is fixedly arranged at the top ends of the first screw 21 and the second trapezoidal sliding block 26; the bending test device 7 comprises a second hydraulic cylinder fixing end 29, a second hydraulic cylinder moving end 30, a connecting seat 31 and a pressing block 32, wherein the bottom end of the second hydraulic cylinder fixing end 29 is fixedly arranged at the bottom end of the support 6, the other end of the second hydraulic cylinder fixing end 29 is connected with one end of the second hydraulic cylinder moving end 30, one end of the second hydraulic cylinder moving end 30 is connected with the top end of the connecting seat 31, and the pressing block 32 is fixedly arranged at the bottom end of the connecting seat 31; sponge is arranged on the inner wall of the clamping groove 10; the clamping groove 10 is made of rubber.

As shown in fig. 1 to 4, a steel bar toughness testing apparatus of the present invention, when operating, opens the moving blocks 9 through the slots 10, respectively places two ends of a steel bar to be subjected to a toughness test in the two moving blocks 9, rotates the rotating wheel 12 clockwise, drives the positive and negative screws 11 to rotate clockwise, drives the two moving blocks 9 to slide close to each other through the clockwise rotation of the positive and negative screws 11 and the internal thread transmission of the two moving blocks 9, clamps and fastens the steel bar through the slots 10 on the two moving blocks 9, synchronously pulls the two fastening devices 4 to move backward along the strip-shaped sliding groove 14 through the two first hydraulic cylinder moving ends 17, pulls the steel bar to perform a tensile test through the two stretching devices 3, judges whether the steel bar is in accordance with a test requirement by observing the deformation generated by the steel bar during the tensile test, after the tensile test is completed, rotates the rotating wheel 12 counterclockwise, drives the positive and negative screws 11 to rotate counterclockwise, drives the two moving blocks 9 to slide outward through the internal thread transmission with the two moving blocks 9 through the internal thread transmission, takes out the steel bar, after the new steel bar is fixed through the two fastening devices 4, opens the servo motor 20, drives the belt pulley 27 on the output end and the belt pulley 27, and the second trapezoidal belt pulley 24, further drives the trapezoidal belt pulley 24 to rotate along the trapezoidal belt pulley 24 and the trapezoidal belt transmission slide block 24, and the trapezoidal belt 24, the trapezoidal belt transmission slide block 24, and the trapezoidal belt 26, and the trapezoidal belt transmission slide block 22, the support 6 and the bending test device 7 are moved to the middle position to perform a bending test on the steel bar, the second hydraulic cylinder fixing end 29 is controlled, the second hydraulic cylinder moving end 30 pushes the connecting seat 31 and the pressing block 32, the pressing block 32 presses the steel bar needing to be subjected to the bending test, the steel bar is made to generate displacement, and whether the test requirements are met is judged by observing the bending deformation and cracking of the steel bar.

The installation mode, the connection mode or the setting mode of the steel bar toughness detection equipment of the utility model are common mechanical modes, and the equipment can be implemented as long as the beneficial effects can be achieved; the external pressure sensor and the external gravity sensor can be used for type selection and purchase according to the actual use of the equipment; the utility model discloses a positive and negative tooth screw rod 11, first pneumatic cylinder stiff end 16, first pneumatic cylinder of reinforcing bar toughness check out test set remove end 17, servo motor 20, second pneumatic cylinder stiff end 29 and second pneumatic cylinder and remove end 30 for purchase on the market, this industry technical staff only need according to its subsidiary operating specification install and operate can, and need not the technical staff in the field and pay out creative work.

All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a reinforcing bar toughness check out test set, a serial communication port, including support (1), base (2), two stretching device (3), two fastener (4), mobile device (5), support (6), bending test device (7), fastener base (8), movable block (9) and draw-in groove (10), base (2) bottom is connected with support (1) top, two stretching device (3) subtend are installed on base (2) top, two fastener (4) are slidable mounting respectively on two stretching device (3), mobile device (5) fixed mounting is on base (2) top, support (6) fixed mounting is on mobile device (5), bending test device (7) fixed mounting is on support (6), fastener base (8) suit is on base (2) top, be provided with movable block (9) on fastener base (8) front side wall, be provided with draw-in groove (10) on movable block (9).

2. The steel bar toughness detection device of claim 1, wherein the fastening device (4) comprises a fastening device base (8), two moving blocks (9), two clamping grooves (10), a positive and negative thread screw (11) and a rotating wheel (12), the fastening device base (8) is slidably mounted on the stretching device (3), two sliding grooves are formed in the fastening device base (8), the two moving blocks (9) are respectively provided with the clamping grooves (10), the bottoms of the two moving blocks (9) are provided with sliding blocks, the two moving blocks (9) are slidably mounted on the two sliding grooves in opposite directions through the sliding blocks, internal threads are respectively formed in the two moving blocks (9), the input end of the positive and negative thread screw (11) is rotatably mounted on the front side wall of the fastening device base (8), the output end of the positive and negative thread screw (11) penetrates through the internal threads of the two moving blocks (9) to be rotatably mounted on the rear side wall of the fastening device base (8), the positive and negative thread screw (11) is provided with a positive thread section and a negative thread section, the internal threads on the positive and negative thread screw (11) are respectively slidably mounted on the positive and negative thread section, the internal threads on the two moving blocks (9) and the positive and the negative thread section, the internal threads on the rotating wheel (11) are respectively slidably mounted with the positive and the negative thread screw (12), and the transmission end of the positive and the negative thread on the positive and the negative thread section, and the rotating wheel (11).

3. The steel bar toughness detection equipment of claim 2, wherein the stretching device (3) comprises a stretching device base (13), a strip-shaped chute (14), a first hydraulic cylinder base (15), a first hydraulic cylinder fixed end (16) and a first hydraulic cylinder moving end (17), the bottom end of the stretching device base (13) is connected with the top end of the base (2), the strip-shaped chute (14) is arranged at the top end of the stretching device base (13), a strip-shaped slider is arranged at the bottom end of the fastening device base (8), the fastening device base (8) is slidably mounted on the strip-shaped chute (14) through the strip-shaped slider, the bottom end of the first hydraulic cylinder base (15) is fixedly mounted on the side wall of the stretching device base (13), the bottom end of the first hydraulic cylinder fixed end (16) is fixedly mounted at the top end of the first hydraulic cylinder base (15), the other end of the first hydraulic cylinder fixed end (16) is connected with one end of the first hydraulic cylinder moving end (17), and the other end of the first hydraulic cylinder moving end (17) is connected with the side wall of the fastening device base (8).

4. The steel bar toughness detection apparatus according to claim 3, wherein the moving device (5) includes a first base (18) of the moving device, a bearing base (19), a servo motor (20), a first screw (21), a first trapezoidal slider (22), a second base (23) of the moving device, a rotating shaft (24), a second screw (25), a second trapezoidal slider (26), a belt pulley (27), and a belt (28), wherein the bottom end of the first base (18) of the moving device is fixedly mounted on the top end of the base (2), two trapezoidal sliding grooves are provided on the top end of the first base (18) of the moving device, the bearing base (19) is fixedly mounted on the top end of the first base (18) of the moving device, the servo motor (20) is fixedly mounted on the left side wall of the first base (18) of the moving device, the output end of the servo motor (20) passes through the left side wall of the first base (18) of the moving device to be concentrically connected with the input end of the first screw (21), the other end of the first screw (21) passes through the bearing base (19) to be rotatably mounted on the right side wall of the first base (18) of the moving device, an internal thread of the first trapezoidal slider (22) is provided on the first trapezoidal slider (22), the bottom end of the first internal thread of the first base (21) is mounted on the second slider, the second slider (21) of the second base (22), and the second internal thread of the second slider (21), the top end of a second base (23) of the mobile device is provided with two second trapezoidal sliding grooves, the input end of a rotating shaft (24) is rotatably installed on the left side wall of the second base (23) of the mobile device, the output end of the rotating shaft (24) is concentrically connected with the input end of a second screw (25), the other end of the second screw (25) is rotatably installed on the right side wall of the second base (23) of the mobile device, inner threads are arranged on a second trapezoidal sliding block (26), the second trapezoidal sliding block (26) penetrates through the second screw (25) to be slidably installed on the two second trapezoidal sliding grooves, the second screw (25) and the inner threads of the second trapezoidal sliding block (26) are in threaded transmission, belt pulleys (27) are concentrically arranged on the output end of a servo motor (20) and the output end of the rotating shaft (24), belts (28) are tensioned and sleeved on the second bases (23) of the two mobile devices, and a support (6) is fixedly installed at the top ends of the first screw (21) and the second trapezoidal sliding block (26).

5. The apparatus for testing toughness of steel bar according to claim 4, wherein the bending tester (7) comprises a second fixed end (29) of hydraulic cylinder, a second movable end (30) of hydraulic cylinder, a connecting seat (31) and a pressing block (32), the bottom of the fixed end (29) of hydraulic cylinder is fixedly installed at the bottom of the supporting seat (6), the other end of the fixed end (29) of hydraulic cylinder is connected with one end of the movable end (30) of hydraulic cylinder, one end of the movable end (30) of hydraulic cylinder is connected with the top of the connecting seat (31), and the pressing block (32) is fixedly installed at the bottom of the connecting seat (31).

6. The steel bar toughness detection apparatus according to claim 5, wherein a sponge is disposed on an inner wall of the slot (10).

7. The steel bar toughness detection device of claim 6, wherein the slot (10) is made of rubber.