Device for testing bending property of steel welded joint

Abstract

The utility model relates to the technical field of steel bending performance testing, in particular to a steel welding joint bending performance testing device which comprises a shell, a support and a pressure unit. A clamping unit is arranged on the support and comprises two bearing seats used for bearing the two ends of steel correspondingly, the two bearing seats are hinged to the two sides of the support correspondingly and located on the upper portion of the support, and the straight line of the two hinged positions where the two bearing seats are hinged to the support is parallel to the horizontal plane. A clamping block is arranged on the upper portion of each bearing base in the length direction of the bearing base in a sliding mode, one end of each clamping block is used for clamping steel, the other end of each clamping block extends to the position below the bearing base in the thickness direction of the bearing base, a winding roller is rotationally arranged below each bearing base, and a tensioning rope is wound around each winding roller. The end, away from the winding roller, of the tensioning rope is fixedly connected with the bottom of the clamping block. According to the utility model, the accuracy of test results is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to steel bending performance test technical field, concretely relates to a kind of steel welding joint bending performance testing device. BACKGROUND

[0002] After steel welding is completed, the bending performance of the welding joint of steel needs to be tested to determine whether the steel meets the processing standard, and when testing large-size steel, due to the size limitation of the testing device, the existing testing equipment cannot adapt to the monitoring requirements of different sizes of steel.

[0003] Chinese patent publication No. CN116698617A discloses a large-size welded steel pipe bending test device, which comprises a front end seat and an end seat. Three laser sights are equidistantly arranged on one side of the middle part of the rear side of the front end seat. Three receiving seats are equidistantly arranged on one side of the middle part of the end seat close to the front end seat. A horizontal bubble is arranged on one side of the middle part of the top of the front end seat and the end seat. An installation seat is fixedly connected to the edge close to the middle part of the side away from the front end seat of the end seat. An installation column is rotatably connected to the middle back part of one side of the installation seat. A winding wheel is arranged on the installation column. A plurality of fixing holes are equidistantly arranged on the edges of both sides of the winding wheel. An installation block is fixedly connected to the top middle back part of the installation seat. A limiting threaded rod is threadedly connected to the middle upper part of the installation block. A wiring column is fixedly connected to the middle upper part of one side of the front end seat close to the end seat. A wire outlet groove is arranged on one side of the middle upper part of the end seat. The middle part of the inner side of the winding wheel is connected to one end of a test wire, and the other end of the test wire penetrates the wire outlet groove and is connected to the middle part of the wiring column.

[0004] Although the above-mentioned scheme has flexibility in adapting to the testing requirements of different sizes of steel, it has deficiencies in ensuring the stress intensity of the testing device. The steel after bending test usually cannot be reused. Currently, the bending performance test of steel welding joint generally adopts sample cutting method, that is, the steel welding joint part is cut off, and equal length steel sections are reserved on both sides of the welding joint as clamping stress points for subsequent testing. However, the existing bending performance test machine base can carry steel, but lacks a limiting and fixing mechanism for the two ends of the steel, so that the steel may deviate during testing. In addition, the specific position of the steel welding joint needs to be determined manually during testing, which increases the subjectivity of the test and may lead to inaccurate test results. UTILITY MODEL CONTENTS

[0005] To solve the above problems, a steel welding joint bending performance testing device is provided, which automatically positions the welding joint of the steel through a pressure roller, and clamps the steel on the receiving seat through a clamping block, so that the steel is not deformed on the receiving seat when the pressure unit is pressed.

[0006] To solve the above problems, a steel welding joint bending performance testing device is provided, which automatically positions the welding joint of the steel through a pressure roller, and clamps the steel on the receiving seat through a clamping block, so that the steel is not deformed on the receiving seat when the pressure unit is pressed.

[0007] Preferably, a limiting rod is fixedly arranged at the end of the receiving seat along the length direction of the receiving seat, the limiting rod penetrates the clamping block along the horizontal direction and is in sliding fit with the clamping block, one end of the clamping block, which is not in contact with the steel, is a non-clamping end, a gap is formed between the non-clamping end of the clamping block and the end of the receiving seat, a spring is arranged in the gap along the extension direction of the limiting rod, the spring is sleeved on the periphery of the limiting rod, and the two ends of the spring are fixedly connected with the clamping block and the end of the receiving seat, respectively.

[0008] Preferably, a gear is arranged at the end of each of the two winding rollers, the two gears are in meshing with each other, and a first rotary driver for driving the gear to rotate is arranged at one end of one of the gears.

[0009] Preferably, the pressure unit comprises a lifting shell moving along the vertical direction, a lifting groove is formed in the lower part of the lifting shell along the vertical direction, a pressure frame is slidably arranged in the lifting groove along the extension direction of the lifting groove, a pressure roller is rotatably arranged at the lower part of the pressure frame, the pressure roller is in rolling fit with the steel arranged on the receiving seat, hydraulic oil is injected into the lifting groove, a flow meter for monitoring the flow rate of the hydraulic oil is arranged on the side wall of the lifting groove, and a valve body is further arranged in the lifting groove.

[0010] Preferably, a shielding plate is horizontally arranged at the upper part of the winding roller, and the shielding plate is fixedly arranged on the support.

[0011] Preferably, a driving unit moving in horizontal direction is arranged on one side of the support, the driving unit comprises a horizontally arranged threaded rod penetrating through the support and threadedly matched with the support, a guide rod is arranged in parallel on one side of the threaded rod, the guide rod penetrates through the support and is slidably matched with the support, and a second rotary driver for driving the threaded rod to rotate is arranged on the end of the threaded rod.

[0012] The present application has the following beneficial effects compared with the prior art:

[0013] 1. In the test process, the steel sample is horizontally placed on two parallel supporting seats, and the two clamping blocks are initially away from each other. The clamping blocks are moved towards each other and clamp the two ends of the steel by the winding roller rotating synchronously to tighten the tension rope. Then, the pressure unit is lowered to contact and apply pressure to the welded joint, causing the steel to bend. At the same time, the supporting seat rotates with the steel. To ensure stable clamping, a pressure sensor is mounted on the clamping block to monitor and adjust the tension of the tension rope to keep the clamping force within the preset threshold, ensuring the accuracy of the test results.

[0014] 2. A pressure roller is arranged in the pressure unit. When the pressure roller contacts the steel sample, the support moves in the horizontal direction, so that the pressure roller in the pressure unit rolls on the upper part of the steel sample. Since the welded joint of the steel is in a convex structure, when the pressure roller rolls on the steel sample and passes through the welded joint, the pressure roller can be lifted by the welded joint, so that the position of the welded joint of the steel can be automatically positioned, avoiding the error caused by manual positioning. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a perspective view of the steel welded joint bending performance testing device of the present application.

[0016] Figure 2 is a perspective view of the steel welded joint bending performance testing device of the present application. Figure 1 is a partial enlarged view of position A in the steel welded joint bending performance testing device of the present application.

[0017] Figure 3 is a sectional perspective view of the steel welded joint bending performance testing device of the present application.

[0018] Figure 4 is a partial enlarged view of position B in the steel welded joint bending performance testing device of the present application. Figure 3

[0019] Figure 5 is a partial enlarged view of position C in the steel welded joint bending performance testing device of the present application. Figure 3

[0020] Figure 6 ​​The utility model relates to a steel welding joint bending performance testing device Figure 3 Partial enlarged view of D in the middle.

[0021] Figure 7 The utility model relates to a steel welding joint bending performance testing device's after removing shell three-dimensional schematic view.

[0022] Figure 8 The utility model relates to a steel welding joint bending performance testing device Figure 7 Partial enlarged view of E in the middle.

[0023] Figure 9 The utility model relates to a steel welding joint bending performance testing device Figure 7 Partial enlarged view of F in the middle.

[0024] Marked number in the drawing is:

[0025] 1, shell, 2, clamping unit, 21, receiving seat, 22, clamping block, 23, tensioning rope, 24, winding roller, 25, limiting rod, 26, spring, 27, gear, 28, first rotary driver, 29, baffle, 3, support, 4, steel, 5, pressure unit, 51, pressure frame, 52, pressure roller, 53, lifting shell, 54, lifting groove, 55, valve body, 6, drive unit, 61, threaded rod, 62, guide rod, 63, second rotary driver. Specific implementation

[0026] In order to further understand the characteristics, technical means and the specific purpose reached of the utility model, functions of the utility model, the utility model is described in further detail below in combination with the specific embodiment and the attached drawing.

[0027] Refer to Figures 1-4 And Figure 6The utility model provides a kind of steel welding joint bending performance testing device, including shell 1 and support 3 being arranged in shell 1, pressure unit 5 is arranged above support 3;Clamping unit 2 for clamping steel 4 is arranged on support 3, clamping unit 2 includes two for respectively receiving the receiving seat 21 of both ends of steel 4, two receiving seats 21 are respectively hinged in the both sides of support 3, and two receiving seats 21 are located in the upper portion of support 3, the straight line of two hinged places of two receiving seats 21 respectively with support 3 is parallel with horizontal plane, clamping block 22 is slidably arranged in the length direction of receiving seat 21 in the upper portion of each receiving seat 21, one end of clamping block 22 is used to clamp steel 4, the other end of clamping block 22 extends to the below of receiving seat 21 along the thickness direction of receiving seat 21, winding roller 24 is rotatably arranged in the below of each receiving seat 21, winding roller 24 is wound with tensioning rope 23, the end portion of tensioning rope 23 away from winding roller 24 is fixedly connected with the bottom of clamping block 22, when winding roller 24 winds tensioning rope 23, two clamping blocks 22 on two receiving seats 21 are close to each other and clamp both ends of steel 4.

[0028] Before the steel material 4 is tested, the steel material 4 sample of the rated length used for the experiment is cut from the original steel material 4, and it is ensured that the steel material 4 sample has a welding joint, and the lengths of the steel material 4 segments on both sides of the welding joint are the same, and then the part of the welding joint that is excessively convex is polished to make the outer surface of the welding joint smooth. For the convenience of description, the steel material 4 with the welding joint will be collectively referred to as the steel material 4 sample hereinafter. When testing, the polished steel material 4 sample is placed horizontally on the two receiving seats 21, at this time the upper end faces of the two receiving seats 21 are parallel to the horizontal plane, and at this time the two clamping blocks 22 arranged on the two receiving seats 21 are away from each other, the steel material 4 placed on the receiving seat 21 is located between the two clamping blocks 22, then the two winding rollers 24 are driven to rotate synchronously, the two winding rollers 24 simultaneously wind the corresponding tension ropes 23, so that the end of the tension rope 23 away from the winding roller 24 drives the clamping block 22 to move, the two clamping blocks 22 are close to each other under the action of the corresponding two tension ropes 23 and clamp the two ends of the steel material 4 sample, then the pressure unit 5 starts to descend, the lower end of the pressure unit 5 contacts the welding joint on the steel material 4 sample and presses downward in the vertical direction, so that the steel material 4 sample is bent under stress, at this time the parts of the steel material 4 on both sides of the welding joint begin to bend, the two receiving seats 21 hinged on the support 3 also rotate synchronously, because of the clamping of the clamping blocks 22, the steel material 4 sample is not easy to slide on the receiving seat 21, and because the receiving seat 21 is in a rotating state during clamping of the clamping block 22, in order to make the tension rope 23 be able to tension the clamping block 22 in real time, a pressure sensor is arranged on the clamping end of the clamping block 22, and a rated pressure threshold is arranged, the clamping of the clamping block 22 to the steel material 4 sample is monitored in real time through the pressure sensor, when the pressure monitored by the pressure sensor gradually decreases, it indicates that the receiving seat 21 is rotating with the bending of the steel material 4 sample, at this time the tension of the tension rope 23 is improved, that is, the winding roller 24 further winds, so that the actual pressure monitored by the pressure sensor is always within the rated pressure threshold range, thereby ensuring the accuracy of the test result.

[0029] With reference to Figure 9 : A limiting rod 25 is fixedly arranged at the end of the receiving seat 21 along the length direction of the receiving seat 21, the limiting rod 25 penetrates the clamping block 22 in the horizontal direction and is in sliding fit with the clamping block 22, one end of the clamping block 22 which does not contact the steel material 4 is a non-clamping end, there is a gap between the non-clamping end of the clamping block 22 and the end of the receiving seat 21, a spring 26 is arranged in the extending direction of the limiting rod 25 in the gap, the spring 26 is sleeved on the periphery of the limiting rod 25, and the two ends of the spring 26 are fixedly connected with the clamping block 22 and the end of the receiving seat 21 respectively, and a pressure sensor is arranged on the clamping end of the clamping block 22.

[0030] With reference to Figure 8: A gear 27 is arranged at the end of each of the two winding rollers 24, the two gears 27 are engaged with each other, and a first rotary driver 28 is arranged at one end of one of the gears 27 for driving the rotation of the gear 27.

[0031] The first rotary driver 28 is preferably a servo motor, when the first rotary driver 28 is started, the first rotary driver 28 drives the rotation of one of the gears 27, and since the two gears 27 arranged on the two winding rollers 24 are engaged with each other, the two winding rollers 24 can be driven to rotate synchronously, and the two winding rollers 24 can synchronously realize the action of paying out or winding up the tensioning rope 23, and the consistency of the movement of the two clamping blocks 22 is ensured. It is worth noting that since the spring 26 is arranged between the clamping block 22 and the end of the receiving seat 21, when the winding roller 24 winds up the tensioning rope 23, the tensioning rope 23 pulls the clamping block 22, so that the two clamping blocks 22 gradually approach each other, and the spring 26 arranged between the clamping block 22 and the receiving seat 21 is gradually compressed, when the test is finished, the winding roller 24 gradually pays out the tensioning rope 23, and the spring 26 pushes the clamping block 22 out when it recovers, so that the two clamping blocks 22 can smoothly release the steel material 4 sample after clamping.

[0032] With reference to Figure 5 : The pressure unit 5 comprises a lifting shell 53 moving in the vertical direction, the lower part of the lifting shell 53 is provided with a lifting groove 54 in the vertical direction, the pressure frame 51 is slidably arranged in the lifting groove 54 in the extending direction of the lifting groove 54, the lower part of the pressure frame 51 is rotatably provided with the pressure roller 52, the pressure roller 52 is in rolling cooperation with the steel material 4 arranged on the receiving seat 21, hydraulic oil is injected into the lifting groove 54, a flow meter for monitoring the flow rate of the hydraulic oil is arranged on the side wall of the lifting groove 54, and a valve body 55 is further arranged in the lifting groove 54.

[0033] In the process of lowering the lifting shell 53, the pressure roller 52 arranged on the pressure frame 51 is lowered synchronously with the lifting shell 53, and the lifting shell 53 stops moving when the pressure roller 52 contacts the upper part of the steel sample 4. In the process of lowering the lifting shell 53, whether the pressure roller 52 contacts the steel sample 4 is judged by monitoring the flow of hydraulic oil in the lifting groove 54 through the flow meter. If the pressure roller 52 contacts the steel sample 4, the flow of hydraulic oil in the lifting groove 54 can be monitored by the flow meter, and the lifting shell 53 will still lower by a rated distance when the pressure roller 52 monitors the flow of hydraulic oil. Then the support 3 moves in the horizontal direction, so that the pressure roller 52 rolls with the upper end surface of the steel 4, and the pressure frame 51 sliding into the lifting groove 54 has enough moving space in the vertical direction for monitoring the ups and downs of the upper end surface of the steel 4. Since there is a protrusion only at the welded joint position of the steel 4, the flow meter cannot monitor the flow of hydraulic oil when the pressure roller 52 normally rolls, but the flow meter can certainly monitor the flow of hydraulic oil when passing through the welded joint position. Thus, the automatic positioning of the welded joint of the steel 4 is realized, and the test accuracy is improved. When the welded joint of the steel 4 is positioned by the pressure roller 52, the valve body 55 is in an open state. After the positioning of the welded joint of the steel 4 by the pressure roller 52 is completed, the valve body 55 is closed, the pressure frame 51 slidingly connected with the lifting groove 54 no longer moves, and the lifting shell 53 continues to lower and press the steel 4 to bend.

[0034] Referring to Figure 6 A shielding plate 29 is horizontally arranged above the winding roller 24, and the shielding plate 29 is fixedly arranged on the support 3.

[0035] Since the metal debris will fall off at the welded joint position of the steel 4 when the steel 4 is bent, in order to avoid the metal debris falling off from being rolled into the tensioning rope 23 when the winding roller 24 winds the tensioning rope 23, the shielding plate 29 is arranged above the winding roller 24. The metal debris falling off when the steel 4 is bent is all received by the shielding plate 29, avoiding the metal debris being rolled into the tensioning rope 23 and cutting the tensioning rope 23.

[0036] Referring to Figure 4 and Figure 7 A driving unit 6 moving in the horizontal direction is arranged on one side of the support 3. The driving unit 6 includes a threaded rod 61 arranged horizontally, the threaded rod 61 penetrating through the support 3 and threadedly connected with the support 3. A guide rod 62 is arranged in parallel on one side of the threaded rod 61, the guide rod 62 penetrating through the support 3 and slidingly connected with the support 3. A second rotary driver 63 for driving the threaded rod 61 to rotate is arranged on the end of the threaded rod 61.

[0037] The second rotary driver 63 is preferably a servo motor, when the second rotary driver 63 is started, the second rotary driver 63 drives the threaded rod 61 to rotate, and the second threaded rod 61 drives the support 3 to move in the horizontal direction.

[0038] Working principle: during the test, the polished steel sample 4 is horizontally placed on the two receiving seats 21, at this time, the upper end faces of the two receiving seats 21 are parallel to the horizontal plane, and at this time, the two clamping blocks 22 arranged on the two receiving seats 21 are away from each other, the steel sample 4 placed on the receiving seat 21 is located between the two clamping blocks 22, then the two winding rollers 24 are synchronously rotated, the two winding rollers 24 simultaneously wind the corresponding tension ropes 23, so that the end of the tension rope 23 away from the winding roller 24 drives the clamping block 22 to move, the two clamping blocks 22 are close to each other under the action of the corresponding two tension ropes 23 and clamp the two ends of the steel sample 4, then the pressure unit 5 starts to descend, and the lower end of the pressure unit 5 is in contact with the welded joint on the steel sample 4 and then stops.

[0039] The support 3 moves in the horizontal direction, so that the pressure roller 52 in the pressure unit 5 rolls on the upper part of the steel sample 4, since the welded joint of the steel 4 is a convex structure, when the pressure roller 52 rolls on the steel sample 4 and passes through the welded joint, the pressure roller 52 can be lifted by the welded joint, so that the position of the welded joint of the steel 4 can be automatically positioned, avoiding the error in manual positioning, then the pressure unit 5 continues to press down in the vertical direction, so that the steel sample 4 is bent, at this time, the steel 4 on both sides of the welded joint of the steel 4 starts to bend, and the two receiving seats 21 hinged on the support 3 also synchronously rotate, since the clamping block 22 is clamped, the steel sample 4 is not easy to slide on the receiving seat 21, and since the receiving seat 21 is in a rotating state during the clamping of the clamping block 22, in order to make the tension rope 23 be able to real-time tension the clamping block 22, a pressure sensor is arranged on the clamping end of the clamping block 22, and a rated pressure threshold is arranged, the clamping of the clamping block 22 to the steel sample 4 is monitored in real time through the pressure sensor, when the pressure monitored by the pressure sensor gradually decreases, it indicates that the receiving seat 21 is rotating with the bending of the steel sample 4, at this time, the tension of the tension rope 23 is improved, that is, the winding roller 24 is further wound, so that the actual pressure monitored by the pressure sensor is always within the rated pressure threshold range, thereby ensuring the accuracy of the test result.

[0040] The above embodiments only express one or several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A steel welding joint bending performance testing device, comprising a shell (1) and a support (3) arranged in the shell (1), and a pressure unit (5) arranged above the support (3). characterized in that A clamping unit (2) for clamping the steel (4) is arranged on the support (3), the clamping unit (2) comprises two receiving seats (21) for receiving two ends of the steel (4) respectively, the two receiving seats (21) are hingedly connected to two sides of the support (3) respectively, and the two receiving seats (21) are located on the upper part of the support (3), the straight lines of the two hinged positions of the two receiving seats (21) and the horizontal plane are parallel, a clamping block (22) is slidably arranged on the upper part of each receiving seat (21) along the length direction of the receiving seat (21), one end of the clamping block (22) is used for clamping the steel (4), and the other end of the clamping block (22) extends to the lower part of the receiving seat (21) along the thickness direction of the receiving seat (21), a winding roller (24) is rotatably arranged below each receiving seat (21), a tensioning rope (23) is wound on the winding roller (24), the end of the tensioning rope (23) away from the winding roller (24) is fixedly connected with the bottom of the clamping block (22), and when the winding roller (24) winds the tensioning rope (23), the two clamping blocks (22) on the two receiving seats (21) are close to each other and clamp the two ends of the steel (4).

2. A device for testing the bend performance of a welded joint of a steel material according to claim 1, characterized in that, A limiting rod (25) is fixedly arranged on the end of the receiving seat (21) along the length direction of the receiving seat (21), the limiting rod (25) penetrates through the clamping block (22) along the horizontal direction and is in sliding fit with the clamping block (22), one end of the clamping block (22) away from the steel (4) is a non-clamping end, there is a gap between the non-clamping end of the clamping block (22) and the end of the receiving seat (21), a spring (26) is arranged in the gap along the extension direction of the limiting rod (25), the spring (26) is sleeved on the periphery of the limiting rod (25), and the two ends of the spring (26) are fixedly connected with the clamping block (22) and the end of the receiving seat (21) respectively, and a pressure sensor is arranged on the clamping end of the clamping block (22).

3. The apparatus for testing the bend performance of a welded joint of a steel material according to claim 1, characterized in that, A gear (27) is arranged at the end of each winding roller (24), the two gears (27) are meshed with each other, and a first rotary driver (28) is arranged at one end of one of the gears (27) and used for driving the gear (27) to rotate.

4. The apparatus for testing the bend performance of a welded joint of a steel material according to claim 1, characterized in that, The pressure unit (5) comprises a lifting shell (53) moving in the vertical direction, a lifting groove (54) is formed in the lower part of the lifting shell (53) in the vertical direction, a pressure frame (51) is slidably arranged in the lifting groove (54) along the extension direction of the lifting groove (54), a pressure roller (52) is rotatably arranged on the lower part of the pressure frame (51), the pressure roller (52) is in rolling fit with the steel (4) arranged on the receiving seat (21), hydraulic oil is injected into the lifting groove (54), a flow meter for monitoring the flow rate of the hydraulic oil is arranged on the side wall of the lifting groove (54), and a valve body (55) is further arranged in the lifting groove (54).

5. The apparatus for testing the bend performance of a welded joint of a steel material according to claim 1, characterized in that, A shielding plate (29) is arranged horizontally above the winding roller (24) and fixed on the support (3).

6. The apparatus for testing the bend performance of a welded joint of a steel material according to claim 1, characterized by A driving unit (6) moving horizontally is arranged on one side of the support (3), the driving unit (6) comprises a threaded rod (61) arranged horizontally, the threaded rod (61) penetrates through the support (3) and threadedly cooperates with the support (3), a guide rod (62) is arranged in parallel on one side of the threaded rod (61), the guide rod (62) penetrates through the support (3) and slidably cooperates with the support (3), and a second rotary driver (63) for driving the threaded rod (61) to rotate is arranged on the end of the threaded rod (61).

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