A double-station steel bar cold bending testing machine

Abstract

The utility model discloses a double-station steel bar cold bending testing machine, which belongs to the technical field of steel bar cold processing and bending, and comprises a base box, wherein a through groove is provided on the top of the base box, and the through groove penetrates into the inner cavity of the base box, and movable support blocks are movably arranged on both sides of the top of the base box. The utility model drives the positive and negative threaded rods to rotate through a driving motor, and cooperates with the threaded sleeve to move the connecting block and the support block toward each other. When the hydraulic cylinder drives the extrusion head to extrude the steel bar, the unbent part of the steel bar is gathered toward the middle to form a local bending effect, and before extrusion, the screw rod is moved toward the middle in cooperation with the screw sleeve, and the steel bar is limited by a limit frame to prevent the steel bar from being displaced forward and backward during the extrusion and bending process, which affects the efficiency of the steel bar bending and avoids the phenomenon that the bending angle does not meet the standard. The limit frame is used to limit the steel bar during the processing process to ensure the stability of the steel bar, which helps to improve the quality of the steel bar bending.

Description

Technical Field

[0001] The utility model relates to the technical field of steel bar cold processing and bending, in particular to a double-station steel bar cold bending testing machine. Background Art

[0002] The cold bending test uses the press bending method or folding bending. Under the condition of gradually reducing the radius R of the punch arc surface, the minimum bending radius Rmin when the outer material of the sample does not produce cracks is measured, and the ratio of it to the basic thickness T of the sample, that is, the minimum relative bending radius Rmin / T0, is used as the bending performance index. The smaller the minimum relative bending radius, the better the bending performance.

[0003] In the prior art, the Chinese utility model with publication number: CN217638453U discloses a double-station steel bar cold bending testing machine, including a test bench, the upper surface of the test bench is fixedly connected to the lower surfaces of four support frames, the upper surfaces of the support frames are equipped with pneumatic push rods, the upper surface of the test bench is fixedly connected to the lower surface of the load-bearing plate, and the debris dropped by the steel bar after bending falls into the ash box under the action of its own gravity, and at the same time the ash box blocks the debris from the moving groove to prevent the debris from falling into the moving groove. When the ash box needs to be cleaned, the reversing turntable drives the load-bearing block a and the load-bearing block b away from each other, and then the ash box in the storage groove is taken out for cleaning, which solves the problem that during the test of the existing device, debris will accumulate inside the moving groove, making it difficult to move the load-bearing block, thereby affecting the normal use of the testing machine.

[0004] In the above technical solution, after the steel bars are placed on the load-bearing blocks a and b, the steel bars are squeezed and bent by the bending parts. Due to the different shapes of the steel bars, when the steel bars with smooth surfaces are squeezed, due to the lack of a limiting structure for the steel bars, the steel bars are prone to slide on the surfaces of the load-bearing blocks a and b, resulting in poor bending effect or the bending angle does not meet the standard. Utility Model Content

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a double-station steel bar cold bending test machine, comprising a base box, a through slot is provided at the top of the base box, and the through slot penetrates into the inner cavity of the base box, movable support blocks are movably arranged on both sides of the top of the base box, a connecting block is fixed at the bottom of the support block, the bottom of the connecting block penetrates the through slot and extends to the inner cavity of the base box, a driving assembly for driving the connecting block is arranged in the inner cavity of the base box, support columns are fixed around the top of the base box, and a fixed plate is fixed at the top of the support column, a hydraulic cylinder is fixed at the top of the fixed plate, the piston rod of the hydraulic cylinder penetrates to the bottom of the fixed plate and is fixed with an extrusion head, the extrusion head is located between the support blocks, support plates are fixed at the front and rear ends of the top of the base box, a guide slot is provided at the center of the support plate, a movable block is slidably connected to the inner cavity of the guide slot, a screw sleeve is embedded at the center of the movable block, and a screw is threadedly connected to the inner cavity of the screw sleeve, and the opposite side of the screw is rotatably connected to the limited position frame through a bearing.

[0006] Preferably, the driving assembly includes a driving motor fixed to the right side of the base box, the output shaft of the driving motor is fixed with a forward and reverse threaded rod, the two ends of the forward and reverse threaded rod rotate on both sides of the inner cavity of the base box through bearings, and both sides of the surface of the forward and reverse threaded rod are threadedly connected with a threaded sleeve, and the threaded sleeve is embedded in the surface of the connecting block.

[0007] Preferably, a support spring is fixed to the inner cavity of the guide groove, and the other side of the support spring is fixed to the surface of the movable block.

[0008] Preferably, a slide groove is provided at the top and the bottom of the inner cavity of the guide groove, and a slider is slidably connected to the inner cavity of the slide groove, and the opposite side of the slider passes through the slide groove and is fixed to the surface of the movable block.

[0009] Preferably, the front end and the rear end of the top of the extrusion head are both fixed with limiting rods, and the top of the limiting rods passes through the fixing plate and extends upward.

[0010] Preferably, a guide block is fixed at the bottom of the inner cavity of the base box, and a feed opening is opened on the front of the base box.

[0011] Preferably, grooves are provided on both sides of the fixing plate, and the grooves extend to above both sides of the extrusion block.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model drives the positive and negative threaded rods to rotate through a driving motor, cooperates with the threaded sleeve to move the connecting block and the supporting block toward each other, and when the hydraulic cylinder drives the extrusion head to extrude the steel bar, the unbent part of the steel bar is gathered to the middle to form a local bending effect. Before extrusion, the screw rod is moved to the middle with the cooperation of the threaded sleeve, and the steel bar is limited by a limit frame to prevent the steel bar from being displaced forward and backward during the extrusion and bending process, affecting the efficiency of the steel bar bending and avoiding the phenomenon of the bending angle not meeting the standard. The limit frame is used to limit the steel bar during the processing process to ensure the stability of the steel bar, which helps to improve the quality of the steel bar bending.

[0014] 2. The utility model facilitates the support of the movable block through the cooperation of the support spring, thereby preventing the limit block from shaking and moving randomly on the surface of the steel bar, which would affect the bending of the steel bar in the later stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0016] Figure 2 It is a schematic diagram of the cross-sectional three-dimensional structure of the base box of the utility model;

[0017] Figure 3 It is a partial three-dimensional structural schematic diagram of the utility model;

[0018] Figure 4 It is a side view of the three-dimensional structure of the support plate of the utility model.

[0019] Numbers in the figure: 1. Base box; 2. Support block; 3. Connecting block; 4. Drive assembly; 41. Drive motor; 42. Positive and negative threaded rod; 43. Threaded sleeve; 5. Fixed plate; 6. Hydraulic cylinder; 7. Extrusion head; 8. Support plate; 9. Guide groove; 10. Movable block; 11. Screw; 12. Limit frame; 13. Support spring; 14. Slide; 15. Slider; 16. Limit rod; 17. Guide block; 18. Feeding port; 19. Groove. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] The utility model provides Figures 1 to 4A double-station steel bar cold bending test machine shown in the figure comprises a base box 1, a through slot is provided on the top of the base box 1, and the through slot penetrates into the inner cavity of the base box 1, movable support blocks 2 are movably provided on both sides of the top of the base box 1, a connecting block 3 is fixed at the bottom of the support block 2, the bottom of the connecting block 3 penetrates the through slot and extends to the inner cavity of the base box 1, a driving assembly 4 for driving the connecting block 3 is provided in the inner cavity of the base box 1, support columns are fixed around the top of the base box 1, and a fixing plate is fixed on the top of the support column 5, a hydraulic cylinder 6 is fixed on the top of the fixed plate 5, the piston rod of the hydraulic cylinder 6 passes through the bottom of the fixed plate 5 and is fixed with an extrusion head 7, the extrusion head 7 is located between the support blocks 2, and support plates 8 are fixed at the front and rear ends of the top of the base box 1, a guide groove 9 is opened at the center of the support plate 8, a movable block 10 is slidably connected to the inner cavity of the guide groove 9, a screw sleeve is embedded at the center of the movable block 10, and a screw rod 11 is threadedly connected to the inner cavity of the screw sleeve, and the opposite side of the screw rod 11 is rotatably connected to the limited position frame 12 through a bearing;

[0022] The forward and reverse threaded rods 42 are driven to rotate by the driving motor 41, and the threaded sleeves 43 are cooperated to move the connecting block 3 and the supporting block 2 toward each other. When the hydraulic cylinder 6 drives the extrusion head 7 to extrude the steel bar, the unbent part of the steel bar is gathered toward the middle to form a local bending effect. Before extrusion, the screw rod 11 is moved toward the middle with the cooperation of the screw sleeve, and the steel bar is limited by the limit frame 12 to prevent the steel bar from moving forward and backward during the extrusion and bending process, affecting the efficiency of the steel bar bending and avoiding the phenomenon of the bending angle not meeting the standard. The limit frame 12 is used to limit the steel bar during the processing process to ensure the stability of the steel bar, which helps to improve the quality of the steel bar bending.

[0023] The driving assembly 4 includes a driving motor 41 fixed to the right side of the base box 1, and the output shaft of the driving motor 41 is fixed with a forward and reverse threaded rod 42. The two ends of the forward and reverse threaded rod 42 rotate on the two sides of the inner cavity of the base box 1 through bearings, and the two sides of the surface of the forward and reverse threaded rod 42 are threadedly connected with threaded sleeves 43, and the threaded sleeves 43 are embedded in the surface of the connecting block 3. The driving motor 41 drives the forward and reverse threaded rod 42 to rotate, and then the forward and reverse threaded rod 42 drives the connecting block 3 to move toward each other through the threaded sleeves 43, and then the connecting block 3 penetrates the through groove to drive the support block 2, so as to ensure that the contact point between the steel bar and the support block 2 changes at all times during the bending process.

[0024] A support spring 13 is fixed to the inner cavity of the guide groove 9, and the other side of the support spring 13 is fixed to the surface of the movable block 10. The setting of the support spring 13 facilitates the support of the movable block 10 to prevent the limit block from shaking and displacing randomly on the surface of the steel bar, affecting the bending of the steel bar in the later stage.

[0025] A slide groove 14 is provided at the top and bottom of the inner cavity of the guide groove 9, and a slider 15 is slidably connected to the inner cavity of the slide groove 14. The opposite side of the slider 15 passes through the slide groove 14 and is fixed to the surface of the movable block 10. The slider 15 slides in the inner cavity of the slide groove 14, which facilitates the limiting of the movable block 10 and prevents the movable block 10 from slipping out of the guide groove 9.

[0026] The front and rear ends of the top of the extrusion head 7 are fixed with limiting rods 16. The top of the limiting rod 16 passes through the fixed plate 5 and extends upward. Through the setting of the limiting rod 16, the extrusion head 7 can be limited to prevent the extrusion head 7 from rotating, which causes the extrusion head 7 to change the bending angle of the steel bar.

[0027] A guide block 17 is fixed at the bottom of the inner cavity of the base box 1, and a discharge port 18 is opened on the front of the base box 1. Through the setting of the guide block 17, the steel bars falling into the base box 1 after processing can be guided and collected, and then discharged from the base box 1 from the discharge port 18 for easy collection.

[0028] Grooves 19 are provided on both sides of the fixing plate 5, and the grooves 19 extend to the top of both sides of the extrusion block. The arrangement of the grooves 19 facilitates the upward bending of the two ends of the steel bars during the bending process to prevent the fixing plate 5 from hindering the movement and deflection of the steel connection.

[0029] During specific use, the steel bar to be processed is placed on the top of the support block 2, and then the screw rod 11 is rotated to make the screw rod 11 move toward the middle in the inner cavity of the screw sleeve, and then the screw rod 11 drives the limit frame 12 to clamp the steel bar, and then the hydraulic cylinder 6 drives the extrusion head 7 to move downward to extrude the steel bar. As the steel bar is bent, the drive motor 41 is started at the same time, and the output shaft of the drive motor 41 drives the positive and negative threaded rods 42 to rotate, and the positive and negative threaded rods 42 drive the connecting block 3 to move toward the middle through the threaded sleeve 43, and then the connecting block 3 drives the support block 2 to move toward the middle. As the steel bar bends, the two ends of the steel bar tilt upward. At this time, the steel bar drives the limit frame 12 to move upward. The limit frame 12 cannot move upward due to the limit of the screw rod 11 and can only close to the middle. Then the screw 11 drives the movable block 10 to close toward the middle in the inner cavity of the guide groove 9. During the bending process of the steel bar, the steel bar is always clamped and limited to prevent the steel bar from shaking back and forth during the bending process.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-station steel bar cold bending testing machine, comprising a base box (1), characterized in that: The top of the base box (1) is provided with a through slot, and the through slot penetrates into the inner cavity of the base box (1); movable support blocks (2) are movably arranged on both sides of the top of the base box (1); a connecting block (3) is fixed to the bottom of the support block (2); the bottom of the connecting block (3) penetrates the through slot and extends into the inner cavity of the base box (1); a driving assembly (4) for driving the connecting block (3) is arranged in the inner cavity of the base box (1); support columns are fixed around the top of the base box (1); a fixing plate (5) is fixed on the top of the support column; a liquid A hydraulic cylinder (6), the piston rod of the hydraulic cylinder (6) passes through the bottom of the fixed plate (5) and is fixed with an extrusion head (7), the extrusion head (7) is located between the support blocks (2), the front and rear ends of the top of the base box (1) are fixed with support plates (8), the center of the support plate (8) is provided with a guide groove (9), the inner cavity of the guide groove (9) is slidably connected with a movable block (10), the center of the movable block (10) is embedded with a screw sleeve, and the inner cavity of the screw sleeve is threadedly connected with a screw rod (11), and the opposite side of the screw rod (11) is rotatably connected to a limit position frame (12) through a bearing.

2. A double-station steel bar cold bending testing machine according to claim 1, characterized in that: The driving assembly (4) comprises a driving motor (41) fixed to the right side of the base box (1); a forward and reverse threaded rod (42) is fixed to the output shaft of the driving motor (41); two ends of the forward and reverse threaded rod (42) rotate on two sides of the inner cavity of the base box (1) through bearings; threaded sleeves (43) are threadedly connected to two sides of the surface of the forward and reverse threaded rod (42); and the threaded sleeves (43) are embedded in the surface of the connecting block (3).

3. A double-station steel bar cold bending testing machine according to claim 1, characterized in that: A support spring (13) is fixed in the inner cavity of the guide groove (9), and the other side of the support spring (13) is fixed to the surface of the movable block (10).

4. The double-station steel bar cold bending testing machine according to claim 1 is characterized in that: The top and bottom of the inner cavity of the guide groove (9) are both provided with a slide groove (14), and the inner cavity of the slide groove (14) is slidably connected with a slider (15), and the opposite side of the slider (15) passes through the slide groove (14) and is fixed to the surface of the movable block (10).

5. The double-station steel bar cold bending testing machine according to claim 1, characterized in that: Limit rods (16) are fixed to the front and rear ends of the top of the extrusion head (7), and the top of the limit rod (16) passes through the fixing plate (5) and extends upward.

6. The double-station steel bar cold bending testing machine according to claim 1, characterized in that: A guide block (17) is fixed at the bottom of the inner cavity of the base box (1), and a feed opening (18) is provided on the front of the base box (1).

7. The double-station steel bar cold bending testing machine according to claim 1, characterized in that: Grooves (19) are provided on both sides of the fixing plate (5), and the grooves (19) extend to the top of both sides of the extrusion block.

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