Forward and reverse bending testing machine for reinforcing steel bar

Abstract

The utility model relates to the technical field of steel bar bending test equipment, and provides a steel bar forward and reverse bending tester which comprises a base, a first bracket fixedly mounted at the top of the base, a second bracket fixedly mounted on the base positioned on the outer side of the first bracket, and a control box fixedly mounted at the bottom of the first bracket positioned on one side of the second bracket, two bearing mechanisms are arranged at the top of the first support, each bearing mechanism comprises a rotating shaft and a bearing seat, the bearing seats are fixedly installed on the rotating shafts, the rotating shafts are movably installed on the first support, and a hydraulic mechanism is fixedly installed at the top of the second support. The supporting seat is arranged on the rotatable rotating shaft, the first V-shaped groove is formed in the top of the supporting seat, a straight reinforcing steel bar or a bent reinforcing steel bar can be supported, the abutting head is movably installed at the bottom of the installation seat through the two side rods, and the abutting face of the abutting head and the reinforcing steel bar can be rapidly adjusted according to positive and negative bending of the reinforcing steel bar; therefore, forward and reverse bending stability of the steel bar is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of steel bar bending test equipment, and specifically, to a steel bar positive and reverse bending testing machine. Background Technique

[0002] The steel bar bending test is mainly used to evaluate the plastic deformation ability and crack resistance of steel bars under the action of bending force. In this test, a steel bar specimen with specific dimensions is placed on a special bending machine, and a gradually increasing bending moment is applied until the specimen reaches the specified bending angle or breaks;

[0003] In the above process, observe and record the bending deformation of the steel bar, whether cracks appear, and the state at the time of fracture, so as to judge whether it meets the index requirements for bending performance in relevant building material standards. For example, the Chinese utility model patent disclosed in the publication number CN221038489U: a steel bar bending testing machine. Through the corresponding cooperation of each structure, the positioning notch on the first reinforcing disc and the second reinforcing disc first limits the steel bar, and then the steel bar is pressurized by the downward displacement of the reinforcing pressure rod and the third reinforcing disc. Moreover, this application also rotates the second reinforcing disc and the first reinforcing disc to realize the synchronous transmission and testing of the steel bar, and can also limit the steel bar through the positioning notch on the first reinforcing disc, the second reinforcing disc and the third reinforcing disc to ensure the stability of the steel bar during the bending test. However, after the steel bar is bent by the first reinforcing disc, the second reinforcing disc and the third reinforcing disc, the bent steel bar cannot be stably placed between the first reinforcing disc and the second reinforcing disc, so the reverse bending test of the bent steel bar cannot be realized. That is, this application cannot measure the bending strength and fatigue performance of the steel bar through the reverse bending test, and at the same time, investigate the strain state of the steel bar under normal bending load and cracking load. Content of the Utility Model

[0004] The purpose of the utility model is to provide a steel bar positive and reverse bending testing machine, which uses a support seat with an adaptively adjustable angle to support and place the steel bar, and uses a contact head with a rotatable contact surface, and can realize the positive and reverse bending test of the steel bar in cooperation with a hydraulic mechanism, which can effectively solve the problems in the background technique.

[0005] The technical solution of the utility model is as follows:

[0006] A steel bar forward and reverse bending testing machine includes a base, a first bracket fixedly mounted on the top of the base, a second bracket fixedly mounted on the base located outside the first bracket, a control box fixedly mounted on the bottom of the first bracket located on one side of the second bracket, two supporting mechanisms are provided on the top of the first bracket, the supporting mechanism includes a rotating shaft and a supporting seat, the supporting seat is fixedly mounted on the rotating shaft, and the rotating shaft is movably mounted on the first bracket, a hydraulic mechanism is fixedly mounted on the top of the second bracket, a fixed seat is fixedly mounted on the output end of the hydraulic mechanism, a resistance mechanism is provided at the bottom of the fixed seat, the resistance mechanism includes a mounting seat and a resistance head, the resistance head is movably mounted on the bottom of the mounting seat through two side rods, and the mounting seat is fixedly mounted on the bottom of the fixed seat.

[0007] Optionally, two shaft seats are fixedly mounted on both sides of the top of the first bracket.

[0008] Optionally, both sides of the rotating shaft are rotatably mounted in corresponding shaft seats, and the rotating shaft located on one side of one of the shaft seats is also fixedly mounted with an angle measuring instrument, and the supporting seat is placed between the two shaft seats.

[0009] Optionally, a first V-shaped groove is provided on the top of the supporting seat, and two supporting seats with adaptive angle adjustment are provided on the top of the first bracket to support the steel bars to be bent.

[0010] Optionally, two guide rails are fixedly installed on the front and rear sides of the second bracket, and a side panel is provided on one side of the two guide rails. Two sliders are fixedly installed on one side of the side panel, and the sliders are slidably installed on the corresponding guide rails.

[0011] Optionally, the front and rear sides of the fixing seat are also fixedly mounted on one side of the corresponding side plate respectively. By setting the two side plates and the slider, the fixing seat can be raised and lowered more stably through the output end of the hydraulic mechanism.

[0012] Optionally, a slide groove is provided on both sides of the mounting seat, a mounting groove is provided on both sides of the slide groove, a screw groove is provided at the top center position of the slide groove, a mounting block is installed between the two mounting grooves, a screw is installed in the mounting block, and the top of the screw is threadedly connected to the screw groove, and limit blocks are fixedly installed on both sides of the bottom of the mounting seat, and the two limit blocks have an arc surface on the opposite side. The opening of the slide groove can provide conditions for the movable installation of the side rod, and the setting of the two limit blocks can limit the contact head.

[0013] Optionally, a side block is fixedly installed on the top of the side rod, the side rod is inserted into a slide groove located on one side of the mounting block, and the side block is also inserted into the outside of the screw through an internal through hole, and the screw sleeve between the side block and the mounting block is provided with a compression spring.

[0014] Optionally, a second V-shaped groove is provided at the top of the contact head, and fixed shafts are fixedly installed on both sides of the contact head. The contact head is rotatably installed between two side rods through the fixed shafts on both sides. Rotating the contact head between two side rods and using the stretchable side rods can quickly adjust the contact surface between the contact head and the steel bar.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] For the steel bar forward and reverse bending testing machine of the utility model, a supporting seat is arranged on the rotatable rotating shaft, and a first V-shaped groove is provided at the top of the supporting seat, which can support straight steel bars or bent steel bars. The contact head is movably installed at the bottom of the mounting seat through two side rods, and the contact surface between the contact head and the steel bar can be quickly adjusted according to the forward and reverse bending of the steel bar, so as to ensure the stability of the forward and reverse bending of the steel bar. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above characteristics, technical features, advantages and their implementation manners of the utility model will be further described below in a clear and understandable manner in combination with the drawings of the preferred embodiments.

[0018] Figure 1 is a schematic diagram of the main structure of the utility model;

[0019] Figure 2 is Figure 1 an enlarged view of part A in ;

[0020] Figure 3 is a schematic diagram of the structure of the contact mechanism of the utility model;

[0021] Figure 4 is a disassembled structure diagram of the contact mechanism of the utility model;

[0022] Figure 5 is a bottom view of the mounting seat of the utility model.

[0023] In the figure: 1, base; 2, first bracket; 3, second bracket; 4, control box; 5, supporting mechanism; 6, rotating shaft; 7, supporting seat; 8, hydraulic mechanism; 9, fixed seat; 10, contact mechanism; 11, mounting seat; 12, contact head; 13, side rod; 14, shaft seat; 15, angle measuring instrument; 16, first V-shaped groove; 17, guide rail; 18, side plate; 19, slider; 20, chute; 21, mounting groove; 22, screw groove; 23, limiting block; 24, second V-shaped groove; 25, fixed shaft; 26, side block; 27, mounting block; 28, screw; 29, compression spring. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without inventive work.

[0025] To simplify the drawings, only the parts relevant to the utility model are schematically shown in each figure; they do not represent the actual structure of the product. Furthermore, to simplify the drawings and facilitate understanding, in some figures, only one of the components with the same structure or function is schematically shown or labeled. In this document, "one" not only means "only one" but also "more than one," and "several" includes "two" and "more than two."

[0026] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0027] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0028] Example 1:

[0029] Reference Figures 1 - 5 , which is the first embodiment of the present utility model, proposes a steel bar forward and reverse bending testing machine, including a base 1, a first bracket 2 is fixedly installed on the top of the base 1, a second bracket 3 is fixedly installed on the base 1 located at the outer side of the first bracket 2, a control box 4 is fixedly installed on the bottom of the first bracket 2 located on one side of the second bracket 3, two supporting mechanisms 5 are provided on the top of the first bracket 2, the supporting mechanism 5 includes a rotating shaft 6 and a supporting seat 7, the supporting seat 7 is fixedly installed on the rotating shaft 6, and the rotating shaft 6 is movably installed on the first bracket 2, a hydraulic mechanism 8 is fixedly installed on the top of the second bracket 3, a fixed seat 9 is fixedly installed on the output end of the hydraulic mechanism 8, and a resistance mechanism 10 is provided at the bottom of the fixed seat 9, the resistance mechanism 10 includes a mounting seat 11 and a resistance head 12, the resistance head 12 is movably mounted on the bottom of the mounting seat 11 through two side rods 13, and the mounting seat 11 is fixedly mounted on the bottom of the fixed seat 9.

[0030] Example 2:

[0031] Reference Figures 2 - 5 , which is the second embodiment of the present utility model. The difference between this embodiment and the first embodiment is that: two shaft seats 14 are fixedly installed on both sides of the top of the first bracket 2, and both sides of the rotating shaft 6 are respectively rotatably installed in the corresponding shaft seats 14. An angle measuring instrument 15 is also fixedly installed on the rotating shaft 6 on one side of one of the shaft seats 14. The supporting seat 7 is placed between the two shaft seats 14. A first V-shaped groove 16 is formed at the top of the supporting seat 7. By providing two supporting seats 7 with self-adaptive angle adjustment at the top of the first bracket 2, the steel bars to be bent can be supported. Two guide rails 17 are fixedly installed on the front side and the rear side inside the second bracket 3. A side plate 18 is arranged on one side of the two guide rails 17. Two sliders 19 are fixedly installed on one side of the side plate 18, and the sliders 19 are slidably installed on the corresponding guide rails 17. The front side and the rear side of the fixed seat 9 are also respectively fixedly installed on one side of the corresponding side plate 18. By means of the arrangement of the two side plates 18 and the sliders 19, the fixed seat 9 can be made to lift more stably through the output end of the hydraulic mechanism 8. Installation grooves 20 are formed on both sides of the mounting seat 11. Installation grooves 21 are formed on both sides inside the installation grooves 20. A screw groove 22 is formed at the center position of the top inside the installation grooves 20. An installation block 27 is inserted between the two installation grooves 21. A screw 28 is inserted into the installation block 27, and the top of the screw 28 is threadedly connected to the screw groove 22. Limiting blocks 23 are also fixedly installed on both sides of the bottom of the mounting seat 11, and the opposite sides of the two limiting blocks 23 have arc surfaces. By providing the installation grooves 20, conditions can be provided for the movable installation of the side rod 13. The arrangement of the two limiting blocks 23 can limit the abutting head 12. A side block 26 is fixedly installed at the top of the side rod 13. The side rod 13 is inserted into the installation groove 20 on one side of the installation block 27, and the side block 26 is also inserted outside the screw 28 through the through hole inside. A compression spring 29 is sleeved on the screw 28 between the side block 26 and the installation block 27. A second V-shaped groove 24 is formed at the top of the abutting head 12. Fixed shafts 25 are fixedly installed on both sides of the abutting head 12. The abutting head 12 is rotatably installed between the two side rods 13 through the fixed shafts 25 on both sides. By rotatably installing the abutting head 12 between the two side rods 13 and by means of the stretchable side rod 13, the rapid adjustment of the abutting surface between the abutting head 12 and the steel bar can be achieved.

[0032] It should be noted that the present utility model is a steel bar forward and reverse bending testing machine. When the steel bar is bent forward, the steel bar can be horizontally placed in the first V-shaped grooves 16 on the tops of two supporting seats 7, so that the two supporting seats 7 maintain a horizontal posture to support the steel bar, and the angle data of the two angle measuring instruments 15 is zero. Then, the hydraulic mechanism 8 is started through the control box 4, so that the output end of the hydraulic mechanism 8 moves the fixed seat 9 downward, and the fixed seat 9 synchronously drives the side plates 18 on the front and rear sides to slide on one side of the corresponding supporting seat 7 through the sliders 19 on the other side respectively. At the same time, the fixed seat 9 also drives the mounting seat 11 and the abutting head 12 to move downward synchronously. Furthermore, the arc part at the bottom of the abutting head 12 abuts against the steel bar and presses the steel bar, so that the steel bar can be bent. When the steel bar is bent, the middle position of the steel bar will sink, and the two sides of the steel bar gradually slide in the first V-shaped grooves 16 on the tops of the corresponding supporting seats 7 and drive the supporting seats 7 to change the angle. When the forward bending of the steel bar is completed, the output end of the hydraulic mechanism 8 can be retracted through the control box 4, so as to retract the fixed seat 9, the mounting seat 11 and the abutting head 12. At this time, the situation of the bent part of the steel bar can be checked;

[0033] When a reverse bending test of the steel bar is required, the protruding part of the steel bar can be facing upward, and the two sides of the steel bar are respectively inserted and installed in the first V-shaped grooves 16 on the tops of the corresponding supporting seats 7, and the supporting seats 7 rotate adaptively with the rotating shaft 6 as the axis, so that the angles of the two supporting seats 7 and the two sides of the steel bar are the same. Then, the abutting head 12 can be manually pulled down. Thus, the abutting head 12 drives the corresponding side rods 13 to move downward in the corresponding sliding grooves 20 through the fixed shafts 25 on both sides, and the side blocks 26 at the tops of the side rods 13 also move downward outside the screws 28 and compress the compression springs 29 onto the mounting blocks 27, so that the second V-shaped groove 24 at the top of the abutting head 12 is disengaged from the two limiting blocks 23. Then, the abutting head 12 is manually rotated 180 degrees between the two side rods 13 with the fixed shafts 25 on both sides as the axis, and the second V-shaped groove 24 is made to face downward. Then, the abutting head 12 is released, and the compression springs 29 can be used to stretch and rebound to lift the side rods 13, and then drive the abutting head 12 to move upward, and the arc surface part of the abutting head 12 is stuck between the two limiting blocks 23, so that when the hydraulic mechanism 8 drives the mounting seat 11 and the abutting head 12 to press downward through the fixed seat 9, the abutting head 12 can be stuck to the protruding part of the bent steel bar through the second V-shaped groove 24, ensuring the stability of the reverse bending of the steel bar.

[0034] The above has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A steel bar forward and reverse bending testing machine, characterized by: The invention comprises a base (1), wherein a first bracket (2) is fixedly mounted on the top of the base (1), a second bracket (3) is fixedly mounted on the base (1) located outside the first bracket (2), a control box (4) is fixedly mounted on the bottom of the first bracket (2) located on one side of the second bracket (3), two supporting mechanisms (5) are provided on the top of the first bracket (2), the supporting mechanism (5) comprises a rotating shaft (6) and a supporting seat (7), the supporting seat (7) is fixedly mounted on the rotating shaft (6), and the rotating shaft (6) is movably mounted on the first bracket (2), a hydraulic mechanism (8) is fixedly mounted on the top of the second bracket (3), a fixed seat (9) is fixedly mounted on the output end of the hydraulic mechanism (8), a conflict mechanism (10) is provided at the bottom of the fixed seat (9), the conflict mechanism (10) comprises a mounting seat (11) and a conflict head (12), the conflict head (12) is movably mounted on the bottom of the mounting seat (11) through two side rods (13), and the mounting seat (11) is fixedly mounted on the bottom of the fixed seat (9).

2. A steel bar forward and reverse bending testing machine according to claim 1, characterized in that: Two shaft seats (14) are fixedly mounted on both sides of the top of the first bracket (2).

3. A steel bar forward and reverse bending testing machine according to claim 2, characterized in that: Both sides of the rotating shaft (6) are rotatably mounted in corresponding shaft seats (14), and the rotating shaft (6) located on one side of one of the shaft seats (14) is also fixedly mounted with an angle measuring instrument (15), and the supporting seat (7) is placed between the two shaft seats (14).

4. A steel bar forward and reverse bending testing machine according to claim 3, characterized in that: A first V-shaped groove (16) is provided on the top of the supporting seat (7).

5. The steel bar forward and reverse bending testing machine according to claim 1, characterized in that: Two guide rails (17) are fixedly mounted on the front and rear sides of the second bracket (3), and a side plate (18) is provided on one side of the two guide rails (17). Two sliders (19) are fixedly mounted on one side of the side plate (18), and the sliders (19) are slidably mounted on the corresponding guide rails (17).

6. A steel bar forward and reverse bending testing machine according to claim 1, characterized in that: The front side and the rear side of the fixing seat (9) are also fixedly mounted on one side of the corresponding side plate (18), respectively.

7. A steel bar forward and reverse bending testing machine according to claim 6, characterized in that: Both sides of the mounting seat (11) are provided with a slide groove (20), both sides of the slide groove (20) are provided with a mounting groove (21), a screw groove (22) is provided at the top center position of the slide groove (20), a mounting block (27) is inserted between the two mounting grooves (21), a screw (28) is inserted into the mounting block (27), and the top of the screw (28) is threadedly connected to the screw groove (22), and both sides of the bottom of the mounting seat (11) are fixedly provided with a limit block (23), and the two limit blocks (23) have an arc surface on the opposite side.

8. The steel bar forward and reverse bending testing machine according to claim 7, characterized in that: A side block (26) is fixedly mounted on the top of the side rod (13), and the side rod (13) is inserted into the slide groove (20) located on one side of the mounting block (27), and the side block (26) is also inserted into the outside of the screw (28) through the internal through hole, and the screw (28) located between the side block (26) and the mounting block (27) is sleeved with a compression spring (29).

9. The steel bar forward and reverse bending testing machine according to claim 8, characterized in that: A second V-shaped groove (24) is provided on the top of the contact head (12), and fixed shafts (25) are fixedly installed on both sides of the contact head (12). The contact head (12) is rotatably installed between the two side rods (13) via the fixed shafts (25) on both sides.

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