rebar bending machine

Abstract

The utility model relates to a kind of steel bar repeated bending testing machine, including vertical plate, the bottom of the vertical plate is provided with pedestal, the front side of the vertical plate is provided with operating platform and swing arm, the operating platform is fixedly connected with vertical plate, the middle part of the operating platform is equipped with first vertical through-hole, the upper end of the first vertical through-hole is provided with support assembly, the swing arm is located the upside of operating platform, the lower end of swing arm is hinged with vertical plate by longitudinal shaft, longitudinal shaft penetrates vertical plate and is connected with the rotating mechanism arranged in the rear side of vertical plate, rotating mechanism drives swing arm to reciprocate by longitudinal shaft;The utility model effectively solves the problem of low efficiency of traditional single test by setting multiple clamping assemblies, multiple clamping assemblies can be installed simultaneously with different specifications of steel bars, multiple steel bars are tested simultaneously when swing arm reciprocates, the detection efficiency is greatly improved, clamping assembly is vertically slid along mounting groove to adapt to the deformation requirement when steel bar is bent, ensure that the test process is stable and reliable.

Description

Technical Field

[0001] This utility model relates to the field of steel bar testing technology, and in particular to a steel bar repeated bending test machine. Background Technology

[0002] After steel reinforcement is produced, it is crucial to test its performance to ensure its reliability in subsequent use, with bending tests being a key step. Traditional methods involve repeatedly bending the steel reinforcement a limited number of times to observe for breakage or obvious fracture marks to determine its performance. However, most existing technologies test only a single steel reinforcement, which is inefficient and cannot meet the need for simultaneous testing of multiple specifications of steel reinforcement, thus reducing the overall efficiency of the production and testing process. Therefore, there is an urgent need to design a device that can simultaneously perform bending tests on multiple steel reinforcements of different specifications to improve testing efficiency and accuracy. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention provides a rebar repeated bending test machine.

[0004] The technical implementation scheme of this utility model is as follows: a rebar repeated bending test machine includes a vertical plate, a base is provided at the bottom of the vertical plate, an operating table and a swing arm are provided on the front side of the vertical plate, the operating table is fixedly connected to the vertical plate, a first vertical through hole is opened in the middle of the operating table, a support component is provided at the upper end of the first vertical through hole, the swing arm is located on the upper side of the operating table, the lower end of the swing arm is hinged to the vertical plate through a longitudinal axis, the longitudinal axis passes through the vertical plate and is connected to a rotating mechanism provided on the rear side of the vertical plate, the rotating mechanism drives the swing arm to reciprocate through the longitudinal axis, a long strip is provided on the front side of the swing arm, a plurality of mounting grooves are opened on one side of the long strip along the front-back direction, and the mounting grooves pass through the top and bottom surfaces of the long strip, a clamping component is provided in each of the plurality of mounting grooves, and the clamping component can slide vertically along the mounting groove.

[0005] Optionally, the clamping assembly includes a fixing block, which has a vertically penetrating third through hole and a transverse threaded hole penetrating the third through hole. An adjusting screw is installed in the threaded hole, one end of the reinforcing bar is inserted into the third through hole, and the reinforcing bar is fixed by the adjusting screw. A slider is provided on the side of the fixing block, and a vertical sliding groove adapted to the slider is formed on the side wall of the mounting groove. A blocking part is provided at the upper and lower ends of the vertical sliding groove.

[0006] Optionally, the front side of the swing arm is also provided with an upper constraint module. The upper constraint module includes a housing with an open top, a second vertical through hole at the bottom of the housing, a detachable upper moving mold embedded in the housing, and a plurality of first vertical tubes provided on the upper moving mold. The lower ends of the first vertical tubes extend downward along the second vertical through hole.

[0007] Optionally, the rotating mechanism includes a gear, a rack, and a cylinder. The gear is coaxially mounted at one end of the longitudinal axis, the rack is slidably mounted on the vertical plate via a guide rail, and the rack meshes with the gear for transmission. The cylinder is mounted on the vertical plate, and the cylinder's movable rod is connected to the rack.

[0008] Optionally, it also includes a lower constraint module, which includes a lower moving mold embedded in the first vertical through hole, and the lower moving mold is provided with a plurality of second vertical tubes.

[0009] Optionally, the number of the first vertical pipe and the second vertical pipe is the same.

[0010] Optionally, the support assembly includes a fixed support and a movable support arranged on both sides of the first vertical through hole. The fixed support is fixed to the operating table by bolts. The movable support includes an L-shaped fixed plate and a support body. The L-shaped fixed plate is fixed to the operating table by bolts. A horizontal adjustment hole is provided on the vertical part of the L-shaped fixed plate. A horizontal threaded rod is welded to the non-support side of the support body. The horizontal threaded rod passes through the horizontal adjustment hole and is equipped with a fixing nut.

[0011] Optionally, mounting holes are provided on the front side of the upright plate near the left and right sides, and photoelectric sensors are respectively installed in the mounting holes. A fan shape is drawn with the vertical axis as the center and the swing arm as the radius, and the mounting holes are located within the fan shape.

[0012] This utility model has the following advantages:

[0013] 1. This utility model effectively solves the problem of low efficiency in traditional single-strand testing by setting multiple clamping components. Multiple clamping components can simultaneously install steel bars of different specifications, enabling simultaneous testing of multiple steel bars during the reciprocating swing of the arm, significantly improving testing efficiency. The clamping components slide vertically along the mounting groove to adapt to the deformation requirements of the steel bars during bending, ensuring a stable and reliable testing process. This device has a compact structure and is easy to operate, providing an efficient testing method for quality control in steel bar production.

[0014] 2. This utility model can adapt to steel bars of different diameters by adjusting the structure of the screw and the fixing block. The slider cooperates with the vertical sliding groove and the blocking part, which allows the clamping component to slide vertically along the installation groove when the steel bar is bent, conforming to the deformation of the steel bar, while avoiding uneven force or damage to the steel bar due to excessive clamping.

[0015] 3. The upper constraint module, lower constraint module, and clamping components of this utility model work together to form upper and lower constraints on the reinforcing bars. The detachable upper and lower moving molds can be flexibly replaced according to the specifications of the reinforcing bars.

[0016] 4. This utility model utilizes a cylinder to drive a spur rack to slide along a guide rail, and then through gear and longitudinal shaft transmission, enables the swing arm to reciprocate.

[0017] 5. The fixed support of this utility model provides stable foundation support, while the dynamic support can be flexibly adjusted in horizontal position via a horizontal threaded rod, a horizontal adjustment hole, and a fixing nut. It can adapt to varying testing requirements when testing reinforcing bars of different specifications or lengths, improving the versatility and flexibility of the testing device.

[0018] 6. This utility model uses photoelectric sensors installed in the mounting holes near the left and right edges of the front side of the upright plate to accurately count the swing cycle of the swing arm and record the number of tests, so as to facilitate the analysis of test results and quality assessment. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0020] Figure 2 This is a schematic diagram of the structure of the swing arm, longitudinal axis and rotation mechanism of this utility model.

[0021] Figure 3 This is a schematic diagram of the structure of the long strip block and clamping assembly of this utility model.

[0022] Figure 4 This is a structural schematic diagram of the upper constraint module of this utility model.

[0023] Figure 5 This is a schematic diagram of the structure of the support components on the operating table of this utility model.

[0024] Figure 6 This is a structural diagram of the upper and lower constraint modules on the operating platform of this utility model.

[0025] The meanings of the reference numerals in the figure are as follows: 1: Vertical plate; 12: Mounting hole; 13: Photoelectric sensor; 2: Base; 3: Operating table; 31: First vertical through hole; 4: Swing arm; 5: Support assembly; 51: Fixed support; 52: Moving support; 521: L-shaped fixing plate; 522: Support body; 523: Horizontal adjustment hole; 524: Horizontal screw; 525: Fixing nut; 6: Longitudinal shaft; 7: Rotating mechanism; 71: Gear; 72: Spur rack; 73: Cylinder; 74: Guide rail. 8: Long strip block, 81: Mounting groove, 811: Vertical sliding groove, 812: Lower blocking part, 813: Upper blocking part, 9: Clamping assembly, 91: Fixing block, 911: Third through hole, 912: Horizontal threaded hole, 92: Adjusting screw, 93: Slider, 10: Upper constraint module, 101: Housing, 1011: Second vertical through hole, 102: Upper moving mold, 103: First vertical tube, 11: Lower constraint module, 1101: Lower moving mold, 1102: Second vertical tube. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the following will describe this utility model in further detail with reference to the accompanying drawings. It is hereby declared that the terms "up," "down," "left," "right," "front," "back," "inner," and "outer," etc., appearing or about to appear in this document, are based solely on the accompanying drawings and are not intended to specifically limit this utility model.

[0027] This embodiment provides a rebar repeated bending test machine, the structure of which is as follows: Figures 1 to 6 As shown, the device includes a vertical plate 1, a base 2, an operating table 3, a swing arm 4, a support assembly 5, a longitudinal shaft 6, a rotating mechanism 7, a long strip 8, and a clamping assembly 9. The vertical plate 1 is vertically fixed to the base 2 to ensure the stability of the entire device. The operating table 3 is fixedly connected to the front side of the vertical plate 1 and has a first vertical through hole 31 in its middle. The support assembly 5 is installed at the upper end of the through hole. The swing arm 4 is located above the operating table 3, and its lower end is hinged to the vertical plate 1 through the longitudinal shaft 6. The rear end of the longitudinal shaft 6 is connected to the rotating mechanism 7 to drive the swing arm 4 to reciprocate. The long strip 8 is fixed to the front side of the swing arm 4. The long strip 8 has multiple mounting grooves 81 that penetrate the top and bottom surfaces along the front-back direction. The clamping assembly 9 is installed in these mounting grooves 81 and can slide vertically along the mounting grooves 81.

[0028] like Figure 3 As shown, the clamping assembly 9 includes a fixing block 91 and an adjusting screw 92. The fixing block 91 has a vertically penetrating third through hole 911 and a horizontally arranged threaded hole 912. One end of the threaded hole 912 penetrates the side wall of the third through hole 911, and the adjusting screw 92 is fitted into the threaded hole. In use, one end of the reinforcing bar is inserted into the third through hole 911, and the reinforcing bar is fixed by tightening the adjusting screw 92. A slider 93 is provided on the side of the fixing block 91, which is adapted to the vertical sliding groove 811 on the side wall of the mounting groove 81. The upper and lower ends of the vertical sliding groove 811 are provided with blocking parts to prevent the clamping assembly 9 from disengaging. The lower end of the vertical sliding groove 811 does not penetrate the long strip block 8, thus forming a lower blocking part 812. The upper end of the vertical sliding groove 811 penetrates the long strip block 8, and a long strip plate is installed on the top of the long strip block 8 as an upper blocking part 813.

[0029] like Figure 4 As shown, an upper constraint module 10 is also installed on the front side of the swing arm 4, including a shell 101 with an open top and a second vertical through hole 1011 at the bottom. A detachable upper moving mold 102 is embedded inside the shell 101. The upper moving mold 102 is provided with a plurality of first vertical tubes 103. The lower end of the first vertical tubes 103 extends downward through the second vertical through hole 1011 to constrain and guide the reinforcing bars.

[0030] like Figure 2As shown, the rotating mechanism 7 includes a gear 71, a rack 72, a guide rail 74, and a cylinder 73. The gear 71 is coaxially mounted on one end of the longitudinal shaft 6. The rack 72 is slidably mounted on the vertical plate 1 through the guide rail 74 and meshes with the gear 71. The cylinder 73 is fixed on the vertical plate 1, and its movable rod is connected to the rack 72 to drive the rack 72 to move, which in turn drives the longitudinal shaft 6 to rotate through the gear 71, so that the swing arm 4 can reciprocate.

[0031] like Figure 6 As shown, the testing machine also includes a lower constraint module 11, specifically including a lower moving mold 1101 embedded in the first vertical through hole 31 of the operating table 3. The lower moving mold 1101 is provided with a plurality of second vertical tubes 1102. The number of second vertical tubes 1102 is the same as that of the first vertical tubes 103, and they work together to constrain the reinforcing bars.

[0032] like Figure 5 As shown, the support assembly 5 consists of a fixed support 51 and a movable support 52, which are respectively arranged on both sides of the first vertical through hole 31. The fixed support 51 is fixed to the operating table 3 by bolts. The L-shaped fixing plate 521 of the movable support 52 is also fixed to the operating table 3 by bolts. The L-shaped fixing plate 521 consists of a horizontal part and a vertical part. The vertical part has a horizontal adjustment hole 523. The non-support side of the support body 522 is welded with a horizontal threaded rod 524. The horizontal threaded rod 524 passes through the horizontal adjustment hole 523 and is equipped with a fixing nut 525 so as to adjust the horizontal position of the movable support 52 to accommodate steel bars of different lengths and specifications.

[0033] like Figure 1 As shown, a mounting hole 12 is opened on the front side of the upright plate 1 near the left and right sides. The mounting hole 12 is equipped with a photoelectric sensor 13 for counting the swing period of the swing arm 4. Specifically, the mounting hole 12 is located within the fan-shaped area drawn with the vertical axis 6 as the center and the swing arm 4 as the radius. This setting ensures that the photoelectric sensor 13 can accurately monitor the swing of the swing arm 4.

[0034] In practical use, appropriate upper moving mold 102 and lower moving mold 1101 are selected according to the specifications of the steel bar to be tested. One end of the steel bar is passed through the first vertical pipe 103, the second vertical pipe 1102, and the third through hole 911 of the clamping assembly 9 in sequence, and the steel bar is fixed by adjusting the screw 92. According to the length of the steel bar and the test requirements, the position of the moving support 52 is adjusted so that the moving support 52 and the fixed support 51 work together to provide stable support for the steel bar. After the cylinder 73 is started, the rack 72 slides along the guide rail 74, driving the gear 71 to rotate, which in turn drives the longitudinal shaft 6 to rotate. The cylinder 73 reciprocates, causing the swing arm 4 to swing back and forth, and the repeated bending test of the steel bar begins. At this time, the clamping assembly 9 moves with the swing arm 4, and the steel bar undergoes bending deformation under the constraint and guidance of the first vertical pipe 103, the second vertical pipe 1102, and the clamping assembly 9, simulating the actual stress situation and detecting the bending performance of the steel bar. The photoelectric sensor 13 monitors the swing arm 4 and counts the swing. The operator can view the number of tests in real time through the connected counting display device, and at the same time observe the changes in the appearance of the steel bar to judge its quality and performance.

[0035] After the predetermined number of bending tests is reached, cylinder 73 is closed, and swing arm 4 stops swinging, ending the test. Loosen adjusting screw 92, remove the reinforcing bar, and conduct a detailed inspection and record, such as measuring the bending angle, observing the fracture location and morphology, etc., to evaluate the quality and performance of the reinforcing bar. This testing machine can efficiently and accurately complete repeated bending tests on multiple reinforcing bars of different specifications.

[0036] The embodiments described above are merely preferred embodiments of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications, improvements, and substitutions without departing from the inventive concept, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A rebar repeated bending test machine, characterized in that: Includes a vertical plate (1), with a base (2) at the bottom of the vertical plate (1), an operating table (3) and a swing arm (4) on the front side. The operating table (3) is fixedly connected to the vertical plate (1). A first vertical through hole (31) is opened in the middle of the operating table (3), and a support assembly (5) is provided at the upper end of the first vertical through hole (31). The swing arm (4) is located on the upper side of the operating table (3), and the lower end of the swing arm (4) is hinged to the vertical plate (1) through a longitudinal shaft (6). The longitudinal shaft (6) passes through the vertical plate (1) and... Connected to a rotating mechanism (7) located on the rear side of the upright plate (1), the rotating mechanism (7) drives the swing arm (4) to reciprocate through the longitudinal axis (6). A long strip (8) is provided on the front side of the swing arm (4). Multiple mounting slots (81) are provided on one side of the long strip (8) along the front-back direction, and the mounting slots (81) penetrate the top and bottom surfaces of the long strip (8). A clamping component (9) is provided in each of the multiple mounting slots (81), and the clamping component (9) can slide vertically along the mounting slot (81).

2. The steel bar repeated bending test machine according to claim 1, characterized in that: The clamping assembly (9) includes a fixing block (91), on which a vertically penetrating third through hole (911) and a transverse threaded hole (912) penetrating the third through hole (911) are provided. An adjusting screw (92) is installed in the threaded hole. One end of the reinforcing bar is inserted into the third through hole (911) and fixed by the adjusting screw (92). A slider (93) is provided on the side of the fixing block (91). A vertical sliding groove (811) adapted to the slider (93) is formed on the side wall of the mounting groove (81). A blocking part is provided at the upper and lower ends of the vertical sliding groove (811).

3. The steel bar repeated bending test machine according to claim 2, characterized in that: The upper constraint module (10) is also provided on the front side of the swing arm (4). The upper constraint module (10) includes a shell (101) with an open top. A second vertical through hole (1011) is provided at the bottom of the shell (101). A detachable upper moving mold (102) is embedded in the shell (101). A plurality of first vertical tubes (103) are provided on the upper moving mold (102). The lower end of the first vertical tube (103) extends downward along the second vertical through hole (1011).

4. The steel bar repeated bending test machine according to claim 3, characterized in that: The rotating mechanism (7) includes a gear (71), a rack (72) and a cylinder (73). The gear (71) is coaxially arranged at one end of the longitudinal shaft (6). The rack (72) is slidably arranged on the vertical plate (1) through the guide rail (74) and meshes with the gear (71) for transmission. The cylinder (73) is arranged on the vertical plate (1) and the movable rod of the cylinder (73) is connected to the rack (72).

5. The steel bar repeated bending test machine according to claim 4, characterized in that: It also includes a lower constraint module (11), which includes a lower moving mold (1101) embedded in the first vertical through hole (31), and a plurality of second vertical tubes (1102) are provided on the lower moving mold (1101).

6. The steel bar repeated bending test machine according to claim 5, characterized in that: The number of the first vertical tube (103) and the second vertical tube (1102) is the same.

7. The steel bar repeated bending test machine according to claim 6, characterized in that: The support assembly (5) includes a fixed support (51) and a movable support (52) arranged on both sides of the first vertical through hole (31). The fixed support (51) is fixed to the operating table (3) by bolts. The movable support (52) includes an L-shaped fixing plate (521) and a support body (522). The L-shaped fixing plate (521) is fixed to the operating table (3) by bolts. A horizontal adjustment hole (523) is provided on the vertical part of the L-shaped fixing plate (521). A horizontal screw (524) is welded to the non-support side of the support body (522). The horizontal screw (524) is inserted into the horizontal adjustment hole (523) and equipped with a fixing nut (525).

8. The steel bar repeated bending test machine according to claim 7, characterized in that: Mounting holes (12) are provided on the front side of the upright plate (1) near the left and right sides respectively. Photoelectric sensors (13) are respectively installed in the mounting holes (12). A fan shape is drawn with the longitudinal axis (6) as the center and the swing arm (4) as the radius. The mounting holes (12) are located in the fan shape.

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