A steel plate bending testing machine

Abstract

The present invention discloses a steel plate bending testing machine, which belongs to the technical field of steel plate bending testing, and comprises a frame, and also comprises a transverse guide rail, a bending support, a bending guide roller, a horizontal oil cylinder, a vertical pressing mechanism, an arc rod, a clamping mechanism, a supply and rotation mechanism and a supporting mechanism; the present invention enables the top surface of the steel plate sample to be clamped and positioned on the two bending supports through the mutual cooperation of the arc rod, the clamping mechanism and the supply and rotation mechanism, and supports the middle part of the bottom surface of the steel plate sample through the supporting mechanism, which can cooperate with the supporting effect of the bending support to improve the placement and installation stability of the steel plate sample, and can also form an anti-deviated positioning for the steel plate sample, thereby ensuring the force uniformity of the steel plate sample during the subsequent bending test, and effectively improving the measurement accuracy of the bending test parameters of the steel plate sample.

Description

Technical Field

[0001] The invention belongs to the technical field of steel plate bending tests, and in particular relates to a steel plate bending testing machine. Background Art

[0002] The bending test is a test to determine the mechanical properties of a material when it is subjected to a bending load. It is one of the basic methods for testing the mechanical properties of materials. It is mainly used to determine the bending strength of brittle and low-plasticity materials (such as cast iron, high carbon steel, tool steel, etc., including steel plates), and can reflect the deflection of the plasticity index. It can also be used to check the surface quality of the material.

[0003] When conducting a steel plate bending test, a steel plate test is used for the test, in which the thickness of the steel plate sample is the thickness dimension of the steel plate; during the test, the force direction is not changed until the specified bending angle is reached, and then the outer surface of the bend is checked for cracks, tears or bubbles, so as to evaluate the bending performance and quality of the steel plate. However, in the actual operation process, the position of the steel plate sample is tilted before the bending test, which will cause uneven force on the sample during the bending process, thereby affecting the measurement accuracy of test parameters such as the bending angle and bending force. In addition, due to the uneven force on the steel plate sample, the steel plate sample may undergo local excessive deformation or fracture during the bending process, causing damage to the sample, and the steel plate sample may fracture due to uneven force, which will cause safety hazards to test personnel and equipment.

[0004] Therefore, a steel plate bending testing machine is needed to solve the problem in the prior art that steel plate samples are prone to tilt when placed before a bending test, resulting in reduced measurement accuracy of test parameters, sample damage and certain safety hazards. Summary of the invention

[0005] The object of the present invention is to provide a steel plate bending testing machine to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a steel plate bending testing machine, comprising a frame, and further comprising:

[0007] Transverse guide rails, two of which are parallel and fixed to the bottom inner wall of the frame, two symmetrically distributed bending supports are slidably connected between the two transverse guide rails, bending guide rollers are installed on the top opposite surfaces of the two bending supports, horizontal oil cylinders are fixed to the inner walls of both sides of the frame, the output ends of the horizontal oil cylinders are fixed to the outer surfaces of the adjacent bending supports, and a vertical pressing mechanism is arranged at the upper center of the two bending guide rollers;

[0008] A fixed seat, two of which are symmetrically fixed at the center of the bottom inner wall of the frame, the inner wall of each of the fixed seats is rotatably connected to two symmetrically distributed arc rods, a rotation mechanism for synchronous rotation of the four arc rods is provided between the two fixed seats, and a clamping mechanism for clamping the top surface of the steel plate sample is provided between the two arc rods located on the same side.

[0009] It should be noted that the vertical pressing mechanism includes:

[0010] A vertical oil cylinder is fixedly connected to the center of the top surface of the frame, and a pressure head mounting seat is fixedly provided at the output end of the vertical oil cylinder, and a curved pressure head is detachably connected to the bottom of the pressure head mounting seat;

[0011] Two longitudinal guide rails are provided and symmetrically fixed to the inner walls of the frame on both sides. A stabilizing rod is slidably connected to the interior of each longitudinal guide rail, and the opposite surfaces of the two stabilizing rods are respectively fixed to the two side surfaces of the pressure head mounting seat.

[0012] It is further worth noting that the transfer mechanism includes:

[0013] Rotating gears, there are four rotating gears and the four rotating gears are respectively coaxially fixed with the four arc-shaped rods, two rotating gears located at the same end are meshed and connected with a pressing rack rod, and a stabilizing member is provided at the top of each pressing rack rod;

[0014] The fixing posts are provided with two and are respectively fixed through the inner wall of the pressing rack rod. The outer surface of the fixing seat is provided with a pressing groove, and the two fixing posts are respectively located on the inner walls of the two pressing grooves.

[0015] As a preferred embodiment, the stabilizing member comprises:

[0016] A pressing block, the pressing block is fixed to the top surface of the pressing rack rod, and two symmetrically distributed support rods are fixed to the bottom surface of the pressing block, and the bottom of the support rod slides through the top surface of the adjacent fixing seat;

[0017] The supporting spring is provided with two supporting springs and respectively sleeved on the outer surfaces of the two supporting rods, and the two ends of the supporting spring are respectively fixed to the opposite surfaces of the pressing block and the fixing seat.

[0018] It should be further explained that the clamping mechanism includes:

[0019] A fixed block, two fixed blocks are provided and are respectively fixed to the opposite surfaces of the two arc-shaped rods, a clamping rod is slidably penetrated through the outer surface of each fixed block, a sliding block is fixed to the bottom end of the clamping rod, a clamping spring is provided on the outer surface of the clamping rod and is fixed to the opposite surfaces of the fixed block and the sliding block, and a clamping roller is rotatably connected between the two sliding blocks;

[0020] The guide groove is arranged on the outer surface of the end of the arc rod, and the two ends of the rotating shaft of the pressing roller are respectively located inside the two guide grooves.

[0021] As a preferred embodiment, a central partition fixed to the middle of the end surface of the frame is arranged on the periphery of the two curved supports, and protective partitions fixed to the outer surface of the frame are arranged on both sides of the central partition, and two symmetrically distributed sliding baffles are fitted on the outer surface of the central partition, and the sliding baffles are slidably installed between the outer surface of the protective baffle and the bottom surface of the frame.

[0022] As a preferred implementation, an isolation mesh is fixed to the outer end surface of the frame away from the sliding baffle, and a scale mark is provided on the top surface of the transverse guide rail close to the sliding baffle.

[0023] As a preferred embodiment, a support mechanism for supporting the bottom surface of the steel plate sample is arranged between the two fixing seats, and the support mechanism includes:

[0024] A support plate, the surfaces of both ends of the support plate are respectively fitted on the opposite surfaces of the two pressing rack rods, the outer surfaces of both ends of the support plate are respectively fixed to the ends of the two fixing columns, and the middle surface of the support plate is slidably penetrated by two parallel inserted rods;

[0025] A docking ring is tightly sleeved on the top outer surfaces of the two plug rods, and the top surface of the docking ring is provided with a positioning block inserted in the top ends of the two plug rods. The outer surface of each of the plug rods is provided with a tightening spring fixed to the opposite surfaces of the support plate and the docking ring.

[0026] Compared with the prior art, the steel plate bending test machine provided by the present invention has at least the following beneficial effects:

[0027] (1) Through the cooperation of the arc rod, the clamping mechanism and the rotation mechanism, the top surface of the steel plate sample is clamped and positioned on the two bending supports, and the middle part of the bottom surface of the steel plate sample is supported by the supporting mechanism, which can not only cooperate with the supporting function of the bending support to improve the placement and installation stability of the steel plate sample, but also form an anti-deviated positioning for the steel plate sample, ensure the uniformity of the force on the steel plate sample during the subsequent bending test, and effectively improve the measurement accuracy of the bending test parameters of the steel plate sample.

[0028] (2) During the bending test of the steel plate specimen, the top outer surface of the steel plate specimen is pressed and squeezed by the pressing roller through the interaction of the arc rod, the clamping mechanism and the rotation mechanism. Then, the arc rod is driven by the clamping roller to rotate synchronously for protection, so that the steel plate specimen is protected step by step during the bending test. The balance stability of the steel plate specimen during the bending test is improved to a certain extent, and the safety performance of the steel plate specimen to the equipment and operators when the steel plate specimen is broken is reduced to a certain extent, which significantly reduces the safety hazards of the steel plate specimen during the bending test. Finally, the clamping roller returns to its initial state and is separated from the steel plate specimen.

[0029] (3) The setting of the supporting mechanism. After the steel plate bending test is completed, the positioning block can drive the bent steel plate sample to be pushed upward through the synchronous driving action of the vertical cylinder and the horizontal cylinder, thereby effectively improving the convenience of removing the steel plate sample after the bending test. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 It is a schematic diagram of the back structure of the frame of the present invention;

[0032] Figure 3 It is a schematic diagram of the local structure of the central partition of the present invention;

[0033] Figure 4 It is a schematic diagram of the partial structure inside the frame of the present invention;

[0034] Figure 5 It is a partial structural schematic diagram of the supply and transfer mechanism of the present invention;

[0035] Figure 6 It is a schematic diagram of the local structure of the pressing roller of the present invention;

[0036] Figure 7 For the present invention Figure 6 A schematic diagram of the enlarged structure of the middle A area;

[0037] Figure 8 It is a schematic diagram of the local structure of the bending guide roller of the present invention;

[0038] Fig. 9 For the present invention Figure 8 Schematic diagram of the enlarged structure of the middle B area;

[0039] Fig.10 It is a schematic diagram of the local structure of the stabilizing member of the present invention;

[0040] Fig.11 For the present invention Fig.10 Schematic diagram of the enlarged structure of the middle C area.

[0041] In the figure: 1, frame; 2, transverse guide rail; 3, bending support; 4, bending guide roller; 5, horizontal cylinder; 6, vertical pressing mechanism; 61, vertical cylinder; 62, pressure head mounting seat; 63, curved pressure head; 64, longitudinal guide rail; 65, stabilizer bar; 7, fixed seat; 8, curved rod; 9, supply mechanism; 91, rotating gear; 92, pressing rack rod; 93, stabilizer; 931, pressing block; 932, support rod; 933, support spring ; 94. Fixed column; 95. Pressing groove; 10. Clamping mechanism; 101. Fixed block; 102. Clamping rod; 103. Sliding block; 104. Clamping spring; 105. Clamping roller; 106. Guide groove; 11. Center partition; 12. Protective partition; 13. Sliding baffle; 14. Isolation mesh; 15. Support mechanism; 151. Support plate; 152. Insert rod; 153. Docking ring; 154. Clamping spring; 155. Positioning block. DETAILED DESCRIPTION

[0042] The present invention will be further described below in conjunction with the embodiments.

[0043] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present disclosure.

[0044] Unless otherwise defined, the technical or scientific terms used in the present disclosure shall have the usual meanings understood by persons with ordinary skills in the field to which the present disclosure belongs. The words "including" or "comprising" and the like used in the present disclosure mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. The words "connect" or "connected" and the like are not limited to physical or mechanical connections, but may also include electrical connections, whether direct or indirect. "Up", "down", "left", "right", etc. are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0045] Embodiment 1:

[0046] See also Figure 1-11The present invention provides a steel plate bending test machine, comprising a frame 1, and also comprising a transverse guide rail 2, wherein two transverse guide rails 2 are provided and are parallelly fixed to the bottom inner wall of the frame 1, two symmetrically distributed bending supports 3 are slidably connected between the two transverse guide rails 2, and bending guide rollers 4 are installed on the top opposite surfaces of the two bending supports 3, and horizontal cylinders 5 are fixed to the inner walls of both sides of the frame 1, and the output ends of the horizontal cylinders 5 are fixed to the outer surfaces of the adjacent bending supports 3, and a vertical pressing mechanism 6 is provided at the upper center of the two bending guide rollers 4;

[0047] A fixed seat 7, two fixed seats 7 are provided and symmetrically fixed at the center of the bottom inner wall of the frame 1, the inner wall of each fixed seat 7 is rotatably connected to two symmetrically distributed arc rods 8, a rotation mechanism 9 for synchronous rotation of the four arc rods 8 is provided between the two fixed seats 7, and a pressing mechanism 10 for pressing the top surface of the steel plate sample is provided between the two arc rods 8 on the same side;

[0048] The vertical pressing mechanism 6 includes a vertical oil cylinder 61, which is fixed through the center of the top surface of the frame 1. A pressure head mounting seat 62 is fixed to the output end of the vertical oil cylinder 61, and a curved pressure head 63 is detachably connected to the bottom of the pressure head mounting seat 62.

[0049] Two longitudinal guide rails 64 are provided and symmetrically fixed to the inner walls of the frame 1 on both sides. A stabilizing rod 65 is slidably connected to the interior of each longitudinal guide rail 64. The opposite surfaces of the two stabilizing rods 65 are respectively fixed to the two side surfaces of the pressure head mounting seat 62;

[0050] It should be noted that the hydraulic loading system is composed of the vertical cylinder 61 and the two horizontal cylinders 5, which is used to bend the specimen to a specified angle. The periphery of the frame 1 is also provided with a microcomputer control system combined with the hydraulic loading system, which is used to realize a fully automatic bending test.

[0051] It should be noted that, through the program control of the microcomputer control system, the vertical oil cylinder 61 drives the pressure head mounting seat 62 and the curved surface pressure head 63 to perform vertical downward pressing processing, and at the same time, the two horizontal oil cylinders 5 drive the two bending supports 3 to move synchronously toward the center of the frame 1, so as to achieve synchronous and precise displacement processing of the arc elbow and the two bending supports 3, so as to perform a three-displacement bending test for the steel plate sample placed above the bending support 3, so as to evaluate the bending performance and quality of the steel plate;

[0052] The setting of the rotation mechanism 9 is used to ensure that the top ends of the four arc rods 8 are respectively located on the periphery of the two bending supports 3, so as to cooperate with the setting of the clamping mechanism 10 to clamp the steel plate specimens to be bent and place them on the top surfaces of the two bending supports 3, thereby improving the positioning stability of the steel plate specimens during the bending test and preventing the steel plate specimens from tilting and deflecting when contacting the arc surface pressure head 63.

[0053] Further as Figure 3 , Figure 5 , Figure 7 , Fig. 9 , Fig.10 and Fig.11 As shown, it is worth to explain in detail that the rotation mechanism 9 includes a rotating gear 91, and four rotating gears 91 are provided and the four rotating gears 91 are respectively fixedly arranged coaxially with the four arc-shaped rods 8 in a one-to-one manner, and a pressing rack rod 92 is meshed and connected between the two rotating gears 91 located at the same end, and a stabilizing member 93 is provided at the top end of each pressing rack rod 92;

[0054] Fixed columns 94, two fixed columns 94 are provided and are respectively fixed through the inner wall of the pressing rack rod 92, and a pressing groove 95 is opened on the outer surface of the fixed seat 7, and the two fixed columns 94 are respectively located on the inner walls of the two pressing grooves 95;

[0055] The stabilizing member 93 includes a pressing block 931, which is fixed to the top surface of the pressing rack rod 92, and two symmetrically distributed support rods 932 are fixed to the bottom surface of the pressing block 931, and the bottom of the support rod 932 slides through the top surface of the adjacent fixing seat 7;

[0056] Support springs 933, two support springs 933 are provided and are respectively sleeved on the outer surfaces of the two support rods 932, and the two ends of the support springs 933 are respectively fixed to the opposite surfaces of the pressing block 931 and the fixing seat 7;

[0057] It should be noted that the support spring 933, when not subjected to external force, enables the pressing rack rod 92 to be stably located at the periphery of the fixing seat 7, thereby enabling the rotating gear 91 and the arc rod 8 to be stably installed on the fixing seat 7 in the initial state through the meshing action between the pressing rack rod 92 and the rotating gear 91, and at this time, the top ends of the four arc rods 8 are all located above the curved support 3;

[0058] The setting of the fixing column 94 and the pressing groove 95 is used to guide the pressing rack rod 92 under the action of external force, so as to ensure the movement stability of the pressing rack rod 92.

[0059] Further as Figure 1 , Figure 3 , Figure 4 , Fig. 9 and Fig.11As shown, it is worth specifically explaining that the clamping mechanism 10 includes a fixed block 101, two fixed blocks 101 are provided and are respectively fixed to the opposite surfaces of the two arc-shaped rods 8, and a clamping rod 102 is slidably penetrated through the outer surface of each fixed block 101, and a sliding block 103 is fixed to the bottom end of the clamping rod 102, and a clamping spring 104 is provided on the outer surface of the clamping rod 102 and is fixed to the opposite surfaces of the fixed block 101 and the sliding block 103, and a clamping roller 105 is rotatably connected between the two sliding blocks 103;

[0060] Guide grooves 106, which are formed on the outer surface of the end of the arc-shaped rod 8, and the two ends of the rotating shaft of the pressing roller 105 are respectively located inside the two guide grooves 106;

[0061] It should be noted that when positioning and installing the steel plate sample, firstly, an upward rotation force is applied to the arc rod 8 toward the center of the frame 1, thereby driving the rotating gear 91 coaxially fixed thereto to rotate synchronously, and through the meshing transmission between the same pressing rack rod 92 and the two adjacent rotating gears 91 and the connection between the two clamping mechanisms 10 on the two arc rods 8 on the same side, the four arc rods 8 are synchronously rotated upward toward the center of the frame 1. At this time, the two pressing rack rods 92 synchronously move downward between the two fixed seats 7 and drive the support spring 933 to be compressed until the bottoms of the two clamping rollers 105 are horizontal. After the height of the top surface of the section to the bending support 3 is higher than the thickness of the steel plate sample, the steel plate sample to be subjected to the bending test is placed at the center of the top surface of the two bending supports 3 and adjusted to be straight. At this time, the rotation force on the arc rod 8 is released, and the pressing rack rod 92 can be restored to the initial state through the elastic reset effect of the support spring 933. Through the meshing transmission effect of the pressing rack rod 92 and the two rotating gears 91, the four arc rods 8 can be synchronously rotated toward the outside of the frame 1, and through the elastic force of the clamping spring 104, the two clamping rollers 105 clamp the top surface of the steel plate sample, thereby completing the positioning and installation of the steel plate sample;

[0062] When the steel plate is subjected to the bending test with the three displacements of the bending support 3 and the arc-surface pressure head 63, the bending angle of the steel plate sample will gradually increase. As the steel plate sample bends, the top surface of the steel plate sample will apply a rotational force to the pressing roller 105, thereby causing the pressing spring 104 to be compressed through the sliding of the pressing rod 102 on the fixed block 101 until the pressing spring 104 reaches the compression limit, and then the pressing roller 105 drives the four arc-shaped rods 8 to rotate upward toward the center of the frame 1 synchronously, and at the same time drives the four rotating gears 91 to rotate synchronously, and then the meshing transmission between the rotating gear 91 and the pressing rack rod 92 causes the pressing rack rod 92 to pass through the fixed column 94 in the pressing groove. The guiding action in 95 causes the rack rod 92 to be pressed and drives the support spring 933 to be compressed downward. Finally, in the process of the steel plate sample moving downward and bending, the steel plate sample is separated from the contact with the clamping roller 105. Finally, through the elastic reset action of the support spring 933 and the clamping spring 104, the arc rod 8 is restored to its initial state. That is, in the process of the steel plate sample gradually bending, the top outer surface of the steel plate sample is firstly compressed and squeezed for protection by the clamping roller 105, and then the clamping roller 105 drives the arc rod 8 to be synchronously rotated for protection, so as to realize the step-by-step protection of the steel plate sample during the bending test. Finally, the clamping roller 105 is restored to its initial state and separated from the steel plate sample.

[0063] Further as Figure 1 and Figure 3 As shown, it is worth specifically explaining that a central partition 11 fixed to the middle of the end surface of the frame 1 is arranged on the periphery of the two curved supports 3, and protective partitions 12 fixed to the outer surface of the frame 1 are arranged on both sides of the central partition 11. Two symmetrically distributed sliding baffles 13 are fitted on the outer surface of the central partition 11, and the sliding baffles 13 are slidably installed between the outer surface of the protective baffle 12 and the bottom surface of the frame 1. An isolation mesh plate 14 is fixed to the outer end surface of the frame 1 away from the sliding baffle 13, and a scale mark is arranged on the top surface of the transverse guide rail 2 close to the sliding baffle 13;

[0064] It should be noted that by sliding the sliding baffles 13 at both ends to the protective partition 12, the steel plate sample can be conditioned by the arc rod 8 so that the steel plate sample is placed under the clamping mechanism 10 for clamping and positioning installation. Subsequently, by sliding the sliding baffles 13 on both sides to the central partition 11, a protective treatment can be formed for the curved support 3 in the frame 1, and the isolation mesh plate 14 can be used to protect the rear of the frame 1, thereby effectively improving the safety protection performance for the operator.

[0065] This embodiment has the following working process: when the steel plate sample is subjected to the bending test, the sliding baffles 13 on both sides are first pushed to the protective partition 12 to open the front end of the frame 1, and then the four arc rods 8 are adjusted to rotate the two clamping rollers 105 synchronously until the height of the bottom horizontal section of the two clamping rollers 105 to the top surface of the bending support 3 is higher than the thickness of the steel plate sample, and then the steel plate sample to be subjected to the bending test is placed at the center of the top surface of the two bending supports 3 and adjusted to be straight. At this time, the rotation force on the arc rod 8 is released, so that the two clamping rollers 105 can clamp the top surface of the steel plate sample, thereby completing the center positioning installation of the steel plate sample;

[0066] Through the program control of the microcomputer control system, the vertical oil cylinder 61 drives the pressure head mounting seat 62 and the curved surface pressure head 63 to perform vertical downward pressing processing, and at the same time, the two horizontal oil cylinders 5 drive the two bending supports 3 to move synchronously toward the center of the frame 1, so as to achieve synchronous and precise displacement processing of the arc elbow and the two bending supports 3, so as to perform a three-displacement bending test for the steel plate sample placed above the bending support 3;

[0067] As the steel plate sample bends, the top outer surface of the steel plate sample is first compressed and squeezed for protection by the compression roller 105, and then the compression roller 105 drives the arc rod 8 to perform synchronous rotation protection, thereby realizing step-by-step protection of the steel plate sample during the bending test, improving the balance stability of the steel plate sample during the bending test to a certain extent, and reducing the safety performance of the steel plate sample to the equipment and operators when it breaks to a certain extent, significantly reducing the safety hazards of the steel plate sample during the bending test, and finally the compression roller 105 returns to its initial state and is separated from the steel plate sample.

[0068] Embodiment 2:

[0069] Based on the first embodiment, according to Figure 7 , Figure 8 and Fig.11 As shown, it is worth to explain in detail that a support mechanism 15 for supporting the bottom surface of the steel plate sample is arranged between the two fixing seats 7, and the support mechanism 15 includes a support plate 151, and the surfaces of both ends of the support plate 151 are respectively arranged on the opposite surfaces of the two pressing rack rods 92, and the outer surfaces of both ends of the support plate 151 are respectively fixed to the ends of the two fixing columns 94, and the middle surface of the support plate 151 is slidably penetrated by two parallel inserted rods 152;

[0070] A docking ring 153, which is tightly sleeved on the top outer surfaces of the two plug rods 152, and a positioning block 155 inserted on the top of the two plug rods 152 is provided on the top surface of the docking ring 153, and a tightening spring 154 is fixed to the opposite surfaces of the support plate 151 and the docking ring 153 on the outer surface of each plug rod 152;

[0071] It should be noted that the positioning block 155 is detachably inserted on the top surface of the insertion rod 152. When the bending test is performed on steel plate specimens of different thicknesses, a positioning block 155 adapted thereto can be selected and inserted into the top surface of the insertion rod 152. Both ends of the top of the positioning block 155 are provided with protrusions, the height of which is higher than the height of the bending support 3, and the height of the central part thereof is flush with the bending support 3.

[0072] It should be noted that when positioning and installing the steel plate sample, the pressing roller 105 can be rotated upward by rotating the arc rod 8 toward the center of the frame 1 until the height is higher than the top surface of the bending support 3, and then the steel plate sample is slid from the top surface of one of the bending supports 3, and a downward force is applied to the positioning block 155, and the pressing spring 154 is driven to be compressed, so that the steel plate sample can slide from the top surface of one of the bending supports 3 through the positioning block 155 to the other bending support 3, and the arc rod is released. The force of the support spring 933 and the positioning block 155 can make the double elastic force of the support spring 933 and the compression spring 104 work, and the steel plate sample is compressed by the compression roller 105. The positioning block 155 forms the center positioning of the steel plate sample through the elastic support of the compression spring 154 and the support of the two ends of the two bending supports 3, thereby ensuring the uniformity of the force of the steel plate sample during the bending test, avoiding the deflection and tilt of the steel plate sample during the positioning and installation, and effectively improving the measurement accuracy of the bending test parameters of the steel plate sample.

[0073] It is particularly noted that during the bending process of the steel plate sample, when the elastic force of the compression spring 104 is overcome to the contraction limit, the bottom bending part of the steel plate sample drives the positioning block 155 to move downward, and simultaneously drives the pressing spring 154 to be compressed. At this time, the elastic force of the four support springs 933 is used to press the rack rod 92 and the support plate 151 between the two fixed seats 7 to be in a stable state. Then, the arc rod 8 can directly apply a rotational force to the arc rod 8 through the top surfaces of the two ends of the steel plate sample to the pressing roller 105. At the same time, the bottom surface of the steel plate sample can also drive the pressing rack rod 92 to move downward through the connection between the positioning block 155 and the support plate 151, thereby applying a rotational force to the arc rod 8 through the meshing transmission of the pressing rack rod 92 and the rotating gear 91. At this time, the compression spring 104 and the pressing spring 154 can be compensated by mutual elastic force reset, so that the synchronous rotation of the four arc rods 8 and the downward movement of the support plate 151 can be synchronized and run smoothly.

[0074] When the pressing roller 105 is separated from the pressing roller 105 as the steel plate sample is gradually bent, the arc rod 8 can still rotate continuously through the connection of the positioning block 155 and the support plate 151. At this time, the pressing spring 104 returns to the initial state, so that the pressing roller 105 is in the initial state in the guide groove 106 of the arc rod 8.

[0075] It should be noted that after the steel plate bending test is completed, the positioning block 155 can drive the bent steel plate sample to be ejected upward through the synchronous driving action of the vertical cylinder 61 and the horizontal cylinder 5, thereby effectively improving the convenience of removing the steel plate sample after the bending test.

[0076] In summary, in combination with the two embodiments, it can be known that: through the mutual cooperation of the arc rod 8, the clamping mechanism 10 and the rotation mechanism 9, the top surface of the steel plate sample is clamped and positioned on the two bending supports 3, and the middle part of the bottom surface of the steel plate sample is supported by the support mechanism 15, which can cooperate with the supporting function of the bending support 3 to improve the placement and installation stability of the steel plate sample, and can also form an anti-deviated positioning for the steel plate sample, ensure the uniformity of the force of the steel plate sample during the subsequent bending test, and effectively improve the measurement accuracy of the bending test parameters of the steel plate sample;

[0077] During the bending test of the steel plate sample, the top outer surface of the steel plate sample is pressed and squeezed for protection by the pressing roller 105 through the cooperation of the arc rod 8, the pressing mechanism 10 and the rotation mechanism 9, and then the arc rod 8 is driven by the pressing roller 105 for synchronous rotation protection, so that the steel plate sample is protected step by step during the bending test, which improves the balance stability of the steel plate sample during the bending test to a certain extent, and reduces the safety performance of the steel plate sample to the equipment and operators when the steel plate sample is broken to a certain extent, and significantly reduces the safety hazards of the steel plate sample during the bending test. Finally, the pressing roller 105 returns to the initial state and is separated from the steel plate sample.

[0078] The support mechanism 15 is arranged so that after the steel plate bending test is completed, the vertical cylinder 61 and the horizontal cylinder 5 are synchronously driven to enable the positioning block 155 to push the bent steel plate sample upward, thereby effectively improving the convenience of removing the steel plate sample after the bending test.

[0079] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art. The general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A steel plate bending testing machine, comprising a frame (1), characterized in that: Also includes: A transverse guide rail (2), wherein two transverse guide rails (2) are provided and are parallelly fixed to the bottom inner wall of the frame (1); two symmetrically distributed bending supports (3) are slidably connected between the two transverse guide rails (2); bending guide rollers (4) are installed on the top opposite surfaces of the two bending supports (3); horizontal cylinders (5) are fixed to the inner walls on both sides of the frame (1); the output ends of the horizontal cylinders (5) are fixed to the outer surfaces of the adjacent bending supports (3); and a vertical pressing mechanism (6) is provided at the upper center of the two bending guide rollers (4); A fixed seat (7), wherein two fixed seats (7) are provided and symmetrically fixed at the center of the bottom inner wall of the frame (1), the inner wall of each fixed seat (7) being rotatably connected to two symmetrically distributed arc-shaped rods (8), a rotation mechanism (9) for synchronously rotating the four arc-shaped rods (8) being provided between the two fixed seats (7), and a pressing mechanism (10) for pressing the top surface of the steel plate sample being provided between the two arc-shaped rods (8) located on the same side; The transfer mechanism (9) comprises: Rotating gears (91), four rotating gears (91) are provided and the four rotating gears (91) are respectively coaxially fixedly arranged with the four arc-shaped rods (8), two rotating gears (91) located at the same end are meshedly connected with a pressing rack rod (92), and a stabilizing member (93) is provided at the top end of each pressing rack rod (92); A fixing column (94), wherein two fixing columns (94) are provided and are respectively fixed through the inner wall of the pressing rack rod (92); a pressing groove (95) is provided on the outer surface of the fixing seat (7), and the two fixing columns (94) are respectively located on the inner walls of the two pressing grooves (95); The pressing mechanism (10) comprises: A fixed block (101), wherein two fixed blocks (101) are provided and are respectively fixed to opposite surfaces of two arc-shaped rods (8), a clamping rod (102) is slidably penetrated through the outer surface of each of the fixed blocks (101), a sliding block (103) is fixed to the bottom end of the clamping rod (102), a clamping spring (104) is provided on the outer surface of the clamping rod (102) and is fixed to opposite surfaces of the fixed block (101) and the sliding block (103), and a clamping roller (105) is rotatably connected between the two sliding blocks (103); Guide grooves (106), the guide grooves (106) being formed on the outer surface of the end of the arc-shaped rod (8), and the two ends of the rotating shaft of the pressing roller (105) are respectively located inside the two guide grooves (106); A support mechanism (15) for supporting the bottom surface of the steel plate sample is arranged between the two fixing seats (7), and the support mechanism (15) comprises: A support plate (151), the surfaces at both ends of the support plate (151) are respectively fitted on the opposite surfaces of the two pressing rack rods (92), the outer surfaces at both ends of the support plate (151) are respectively fixed to the ends of the two fixing columns (94), and the middle surface of the support plate (151) is slidably penetrated by two parallel inserted rods (152); A docking ring (153) is tightly sleeved on the top outer surfaces of the two plug rods (152). The top surface of the docking ring (153) is provided with a positioning block (155) inserted into the top ends of the two plug rods (152). The outer surface of each plug rod (152) is provided with a clamping spring (154) fixed to the opposite surfaces of the support plate (151) and the docking ring (153). Both ends of the top of the positioning block (155) are provided with protrusions, the height of which is higher than the height of the bending support (3), and the height of the central part is flush with the bending support (3).

2. The steel plate bending testing machine according to claim 1, characterized in that: The vertical pressing mechanism (6) comprises: A vertical oil cylinder (61), the vertical oil cylinder (61) is fixedly passed through the center of the top surface of the frame (1), a pressure head mounting seat (62) is fixedly provided at the output end of the vertical oil cylinder (61), and a curved pressure head (63) is detachably connected to the bottom of the pressure head mounting seat (62); Two longitudinal guide rails (64) are provided and symmetrically fixed to the inner walls on both sides of the frame (1); a stabilizing rod (65) is slidably connected to the interior of each longitudinal guide rail (64); and opposite surfaces of the two stabilizing rods (65) are respectively fixed to the two side surfaces of the pressure head mounting seat (62).

3. The steel plate bending testing machine according to claim 1, characterized in that: The stabilizing member (93) comprises: A pressing block (931), the pressing block (931) being fixed to the top surface of the pressing rack rod (92), the bottom surface of the pressing block (931) being fixed with two symmetrically distributed support rods (932), the bottom of the support rod (932) slidingly passing through the top surface of the adjacent fixing seat (7); Support springs (933), two support springs (933) are provided and are respectively sleeved on the outer surfaces of the two support rods (932), and the two ends of the support springs (933) are respectively fixed to the opposite surfaces of the pressing block (931) and the fixing seat (7).

4. The steel plate bending testing machine according to claim 1, characterized in that: A central baffle (11) fixed to the middle of the end surface of the frame (1) is arranged on the periphery of the two curved supports (3); protective baffles (12) fixed to the outer surface of the frame (1) are arranged on both sides of the central baffle (11); two symmetrically distributed sliding baffles (13) are fitted on the outer surface of the central baffle (11); the sliding baffles (13) are slidably installed between the outer surface of the protective baffle (12) and the bottom surface of the frame (1).

5. The steel plate bending testing machine according to claim 1, characterized in that: An isolation mesh plate (14) is fixed to the outer end surface of the frame (1) away from the sliding baffle (13), and a scale mark is provided on the top surface of the transverse guide rail (2) close to the sliding baffle (13).

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