Mechanical material stress testing device

Abstract

The invention discloses a mechanical material stress testing device. The mechanical material stress testing device comprises a supporting column frame, a pressurization driving mechanism, a first inspection mechanism, a second inspection mechanism and a pipe, an intelligent controller is mounted on the supporting column frame; the pressurization driving mechanism comprises a driving hydraulic cylinder, a midpoint pressing test block is arranged below the driving hydraulic cylinder, side pressing test blocks are arranged on the two sides of the midpoint pressing test block, and the midpoint pressing test block is slightly higher than the pair of side pressing test blocks; the first inspection mechanism comprises a side supporting column, a first driving motor is mounted on the side supporting column, and a driving screw is mounted on the first driving motor; the second inspection mechanism comprises an inspection rod, and an induction sheet is installed on the inspection rod. Through the arrangement of corresponding mechanisms, the detection of the bending degree of the pipe is improved, so that accurate test data can be obtained during a bending stress test, wrong data evaluation is avoided, the bending bearing capacity of the pipe can be accurately obtained, and unnecessary troubles are reduced for a user.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical material force testing, and in particular relates to a mechanical material force testing device. Background Art

[0002] With the development of science and technology, the requirements for testing and analysis of mechanical materials are constantly increasing. The reliability and advancement of mechanical products, in addition to design factors, depend to a large extent on the quality and performance of the selected materials. The development of new materials is the material basis for developing new products and improving product quality. Among them, the pipe needs to be subjected to bending force test after production to evaluate the load-bearing capacity of the pipe.

[0003] At present, the bending test of pipes usually places the test pipe on a bending test device, applies concentrated force or distributed force to make the test pipe bend and deform, and then evaluates the bearing capacity based on the applied force and the bending deformation. However, in the prior art, the bending amplitude of the pipe may be very small, so it is difficult to accurately judge the degree of deformation with the naked eye, which affects the evaluation of the test data and makes it impossible to obtain the accurate bearing capacity of the pipe, which brings unnecessary trouble to the user.

[0004] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0005] The object of the present invention is to provide a mechanical material stress testing device, which can solve the problem in the prior art that it is inconvenient to observe the degree of deformation during the pipe bending stress test.

[0006] In order to achieve the above object, a technical solution provided by a specific embodiment of the present invention is as follows: A mechanical material stress testing device comprises: a support column frame, a pressure driving mechanism, a first inspection mechanism and a second inspection mechanism; An intelligent controller is installed on the support column frame; The pressurizing driving mechanism is installed on the supporting column frame, and the pressurizing driving mechanism includes a driving hydraulic cylinder, a midpoint downward pressure test block is arranged below the driving hydraulic cylinder, side downward pressure test blocks are arranged on both sides of the midpoint downward pressure test block, the midpoint downward pressure test block is slightly higher than the pair of side downward pressure test blocks, the bottoms of the pair of side downward pressure test blocks are both chiseled with arc grooves, and the bottom of the midpoint downward pressure test block is chiseled with a cross groove; The first inspection mechanism is installed below the midpoint pressure test block, and the first inspection mechanism includes a side support column, a first drive motor is installed on the side support column, a drive screw is installed on the first drive motor, a detection component is threadedly connected to the drive screw, and a pipe is inserted between the side support column and the support column frame; The second inspection mechanism is arranged on a side of the support column frame away from the side support column, and the second inspection mechanism includes an inspection rod, and a sensor sheet is installed on the inspection rod.

[0007] In one or more embodiments of the present invention, a sliding cavity is excavated on the support column frame to provide space for the movement of the semicircular limiting clamp ring, so that a pair of semicircular limiting clamp rings can move away from and approach each other. A pair of semicircular limiting clamp rings are arranged in the sliding cavity to limit the pipe. The pair of semicircular limiting clamp rings can block the continued insertion of the pipe, and the diameter of the circle formed by the pair of semicircular limiting clamp rings is the same as the diameter of the inspection rod and the inner diameter of the pipe, thereby also limiting the insertion of the inspection rod, so that the insertion of the inspection rod is not easy to be skewed; A pair of the semicircular limiting clamps are both connected with driving bolts, and the driving bolts are threadedly connected to the support column frame. The sliding of the semicircular limiting clamps can be controlled by rotating the driving bolts, thereby facilitating the operation of the staff.

[0008] In one or more embodiments of the present invention, a connecting bearing is fixedly connected between one end of the driving bolt arranged in the sliding cavity and the semicircular limiting clamping ring, so that the rotation of the driving bolt will not drive the semicircular limiting clamping ring to rotate, but the driving bolt can drive the semicircular limiting clamping ring to slide, thereby improving the stability of the device.

[0009] In one or more embodiments of the present invention, a plurality of connecting bent rods are fixedly connected between the midpoint downward pressure test block and a pair of side downward pressure test blocks, which are used to fixedly connect the midpoint downward pressure test block and a pair of side downward pressure test blocks, so that the midpoint downward pressure test block can drive a pair of side downward pressure test blocks to move up and down, thereby facilitating two-point pressurization of the pipe through a pair of side downward pressure test blocks.

[0010] In one or more embodiments of the present invention, a piston push rod is installed on the driving hydraulic cylinder, which is used to drive the midpoint pressure test block to move up and down, thereby playing a supporting and pressurizing role. A support bearing is fixedly connected between the end of the piston push rod away from the driving hydraulic cylinder and the midpoint pressure test block, so that the midpoint pressure test block can be easily rotated, thereby adjusting the position of the midpoint pressure test block and a pair of side pressure test blocks, thereby enabling the device to realize one-point pressure testing and two-point pressure testing, and the cross groove on the midpoint pressure test block and the arc groove on the side pressure test block can prevent the pressurization from being offset, thereby preventing the pressure from being miscalculated.

[0011] In one or more embodiments of the present invention, an upper clamping block is provided on the side support column, and a hole is drilled on the side where the upper clamping block and the side support column are close to each other, which is used to cooperate with the side support column to fix one end of the pipe, so that the pipe will not shake or tilt during the pressure test, thereby ensuring the stability of the test; A plurality of fastening bolts are inserted into the upper clamping block, and the plurality of fastening bolts are threadedly connected to the side support columns, and the upper clamping block is fixed by the fastening bolts. A fixed bearing is fixedly connected between the end of the driving screw away from the first driving motor and the support column frame, and is used to fix one end of the driving screw so that the driving screw will not tilt or shake, and can thereby stably drive the detection component to slide back and forth.

[0012] In one or more embodiments of the present invention, the detection assembly includes a reciprocating slider, which is used to support the detection table and the ejector pin, and has the function of driving them to slide back and forth. The reciprocating slider is equipped with a detection table for judging the telescopic movement of the ejector pin. The detection table is provided with an ejector pin, which is against the bottom of the pipe, so that it can be known in time when the pipe is bent. A pair of limit grooves are bored on the reciprocating slider, and limit thin rods are inserted into the limit grooves. The two ends of the pair of limit thin rods are respectively fixedly connected to the side support columns and the support column frames. The pair of limit thin rods prevent the reciprocating slider from rotating, thereby enabling the driving screw to drive the reciprocating slider to slide when rotating.

[0013] In one or more embodiments of the present invention, a fixed bent rod is fixed on one side of the support column frame, which is used to support the support drag platform, thereby achieving the function of supporting the inspection rod, so that the inspection rod will not be skewed or fall off, and a support drag platform is installed on the fixed bent rod to support the inspection rod and facilitate the sliding of the inspection rod, and the inspection rod is slidably arranged in the support drag platform; The supporting platform is equipped with a detector for detecting the moving distance of the induction sheet, thereby facilitating knowing the moving distance of the inspection rod. The moving distance of the inspection rod can be used to determine the location where the pipe is bent, thereby providing data for detecting the force on the pipe.

[0014] In one or more embodiments of the present invention, a groove is bored on the inspection rod to provide space for installing a rack to avoid affecting the insertion of the inspection rod into the pipe. A plurality of evenly distributed racks are installed on the side walls of the groove to cooperate with the driving gear so that the rotation of the driving gear can drive the inspection rod to slide, thereby facilitating the control of the insertion of the inspection rod into the pipe.

[0015] In one or more embodiments of the present invention, a fixing bolt is also fixed on the support column frame for fixing the second drive motor so that the second drive motor will not shake or tilt, thereby ensuring the stability of the sliding of the inspection rod. The second drive motor is installed on the fixing bolt to provide power for the sliding of the inspection rod. The second driving motor is fixedly connected with a transmission support shaft for supporting a driving gear and driving the driving gear to rotate. The other end of the transmission support shaft is equipped with a driving gear meshing with a plurality of racks for driving the inspection rod to slide, thereby enabling the inspection rod to be inserted into the pipe.

[0016] Compared with the prior art, the present invention improves the detection of the curvature of the pipe by setting up corresponding mechanisms, so that accurate test data can be obtained during the bending force test, avoiding erroneous data evaluation, and then the bending bearing capacity of the pipe can be accurately obtained, reducing unnecessary trouble for users. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A three-dimensional diagram of a mechanical material force testing device in one embodiment of the present invention; Figure 2 for Figure 1 The schematic diagram of the structure shown at A in the middle; Figure 3 for Figure 1 The schematic diagram of the structure shown at B in the figure; Figure 4 It is a cross-sectional view of a mechanical material force testing device in one embodiment of the present invention; Figure 5 for Figure 4 The schematic diagram of the structure shown at C in the middle; Figure 6 for Figure 4 The schematic diagram of the structure shown at D in the figure; Figure 7 It is a structural schematic diagram of a pressure test block in one embodiment of the present invention; Figure 8 A partial cross-sectional view of a support column frame in one embodiment of the present invention; Fig. 9 for Figure 8 The schematic diagram of the structure shown at E in the middle; Fig.10A diagram of a second inspection mechanism in one embodiment of the present invention; Fig.11 for Fig.10 Schematic diagram of the structure shown at F in the figure.

[0019] Description of main reference numerals: 1-support column frame, 101-intelligent controller, 102-sliding cavity, 103-semicircular limit clamp, 104-driving bolt, 105-connecting bearing, 2-pressurization drive mechanism, 201-driving hydraulic cylinder, 202-midpoint downward pressure test block, 203-side downward pressure test block, 204-connecting bending rod, 205-piston push rod, 206-support bearing, 3-first inspection mechanism, 301-side support column, 302-first drive motor, 303-driving screw, 304-detection component, 3041-reciprocating slider, 3042-test table, 3043-thimble, 305-upper clamping block, 306-fastening bolt, 307-fixed bearing, 308-limiting thin rod, 4-second inspection mechanism, 401-inspection rod, 402-sensing sheet, 403-detector, 404-supporting platform, 405-fixed bent rod, 406-groove, 407-rack, 408-fixing bolt, 409-second driving motor, 410-transmission support shaft, 411-driving gear, 5-pipe. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0021] like Figure 1-Figure 11 As shown, a mechanical material stress testing device in one embodiment of the present invention includes: a support column frame 1, a pressure driving mechanism 2, a first testing mechanism 3 and a second testing mechanism 4.

[0022] like Figure 1 As shown, an intelligent controller 101 is installed on the support column frame 1, and the intelligent controller 101 is electrically connected to the driving hydraulic cylinder 201, the first driving motor 302, the detection component 304 and the second driving motor 409, so that the intelligent controller 101 can intelligently control the device and facilitate the operation of the staff.

[0023] like Figure 1 and Figure 8As shown, a sliding cavity 102 is excavated on the support column frame 1 to provide space for the movement of the semicircular limiting snap ring 103, so that a pair of semicircular limiting snap rings 103 can move away from and approach each other. A pair of semicircular limiting snap rings 103 are arranged in the sliding cavity 102 to limit the pipe 5. The pair of semicircular limiting snap rings 103 can block the continued insertion of the pipe 5, and the diameter of the circle formed by the pair of semicircular limiting snap rings 103 is the same as the diameter of the inspection rod 401 and the inner diameter of the pipe 5, thereby also limiting the insertion of the inspection rod 401, so that the insertion of the inspection rod 401 is not easy to be skewed.

[0024] Among them, a pair of semicircular limiting clamps 103 are both connected with driving bolts 104, and the driving bolts 104 are threadedly connected to the support column frame 1. The sliding of the semicircular limiting clamps 103 is controlled by rotating the driving bolts 104, thereby facilitating the operation of the staff.

[0025] In addition, a connecting bearing 105 is fixedly connected between one end of the driving bolt 104 disposed in the sliding cavity 102 and the semicircular limiting clamp 103, so that the rotation of the driving bolt 104 will not drive the semicircular limiting clamp 103 to rotate, but the driving bolt 104 can drive the semicircular limiting clamp 103 to slide, thereby improving the stability of the device.

[0026] like Figure 1-Figure 7 As shown, the pressurizing driving mechanism 2 is installed on the support column frame 1, and the pressurizing driving mechanism 2 includes a driving hydraulic cylinder 201, which is used to control the lifting and lowering movement of the midpoint downward pressure test block 202 and a pair of side downward pressure test blocks 203, so as to provide power for pressurizing the pipe 5. A midpoint downward pressure test block 202 is arranged below the driving hydraulic cylinder 201, and side downward pressure test blocks 203 are arranged on both sides of the midpoint downward pressure test block 202. Different types of pressurization of the pipe 5 can be achieved through the midpoint downward pressure test block 202 and a pair of side downward pressure test blocks 203, thereby improving the diversity of the test. The midpoint downward pressure test block 202 is slightly higher than the pair of side downward pressure test blocks 203, so that when the pair of side downward pressure test blocks 203 are in contact with the pipe 5, the midpoint downward pressure test block 202 will not be in contact with the pipe 5, thereby achieving two-point pressurization.

[0027] Specifically, arc grooves are bored at the bottom of a pair of side pressure test blocks 203, and a cross groove is bored at the bottom of the midpoint pressure test block 202, so that the pipe 5 can be stuck in the cross groove and the arc groove, thereby facilitating pressure testing of the pipe 5.

[0028] In addition, a plurality of connecting bent rods 204 are fixedly connected between the midpoint downward pressure test block 202 and a pair of side downward pressure test blocks 203, which are used to fixedly connect the midpoint downward pressure test block 202 and a pair of side downward pressure test blocks 203, so that the midpoint downward pressure test block 202 can drive a pair of side downward pressure test blocks 203 to move up and down, thereby facilitating two-point pressurization of the pipe 5 through a pair of side downward pressure test blocks 203.

[0029] like Figure 1-Figure 5 As shown, a piston push rod 205 is installed on the driving hydraulic cylinder 201, which is used to drive the midpoint pressure test block 202 to move up and down, and play a role in supporting and pressurizing. A support bearing 206 is fixedly connected between the end of the piston push rod 205 away from the driving hydraulic cylinder 201 and the midpoint pressure test block 202, so that the midpoint pressure test block 202 can be easily rotated, thereby adjusting the position of the midpoint pressure test block 202 and a pair of side pressure test blocks 203, so that the device can realize one-point pressure test and two-point pressure test, and the cross groove on the midpoint pressure test block 202 and the arc groove on the side pressure test block 203 can prevent the pressure from being offset, so that the pressure will not be calculated incorrectly.

[0030] like Figure 1-Figure 2 As shown, the first inspection mechanism 3 is installed below the midpoint pressure test block 202. The first inspection mechanism 3 includes a side support column 301, which is used to fix the first drive motor 302 to prevent the first drive motor 302 from shaking, and also has the function of supporting and fixing the pipe 5 so that the pipe 5 will not fall off when pressurized. The first drive motor 302 is installed on the side support column 301 to provide power for driving the rotation of the drive screw 303 and the reciprocating sliding of the detection component 304. The first drive motor 302 is installed with a drive screw 303 to drive the detection component 304 to slide back and forth.

[0031] Specifically, the driving screw 303 is threadedly connected with a detection assembly 304 for performing a sliding test on the bottom of the pipe 5. When the pipe 5 is bent, the bottom is not a straight line, so when the ejector pin 3043 slides, telescopic movement occurs, thereby determining the bending of the pipe 5. The pipe 5 is inserted between the side support column 301 and the support column frame 1.

[0032] In addition, an upper clamping block 305 is provided on the side support column 301, and a hole is drilled on the side where the upper clamping block 305 and the side support column 301 are close to each other, which is used to cooperate with the side support column 301 to fix one end of the pipe 5, so that the pipe 5 will not shake or tilt during the pressure test, thereby ensuring the stability of the test. A plurality of fastening bolts 306 are inserted on the upper clamping block 305, and the plurality of fastening bolts 306 are threadedly connected to the side support column 301, and the upper clamping block 305 is fixed by the fastening bolts 306.

[0033] like Figure 4 As shown, a fixed bearing 307 is fixedly connected between the end of the driving screw 303 away from the first driving motor 302 and the support column frame 1, which is used to fix one end of the driving screw 303 so that the driving screw 303 will not tilt or shake, and can thereby stably drive the detection component 304 to slide back and forth.

[0034] like Figure 1-Figure 2 As shown, the detection component 304 includes a reciprocating slider 3041, which is used to support the detection gauge 3042 and the ejector pin 3043, and has the function of driving them to slide back and forth. The detection gauge 3042 is installed on the reciprocating slider 3041, which is used to determine the telescopic movement of the ejector pin 3043. The detection gauge 3042 is provided with the ejector pin 3043, and the ejector pin 3043 is against the bottom of the pipe 5, so that it can be known in time when the pipe 5 is bent.

[0035] like Figure 1-Figure 2 As shown, a pair of limiting grooves are bored on the reciprocating slider 3041, and limiting thin rods 308 are inserted into the limiting grooves. The two ends of the pair of limiting thin rods 308 are respectively fixedly connected to the side support column 301 and the support column frame 1. The pair of limiting thin rods 308 prevent the reciprocating slider 3041 from rotating, so that the driving screw 303 can drive the reciprocating slider 3041 to slide when rotating.

[0036] like Figure 1-Figure 10 As shown, the second inspection mechanism 4 is arranged on the side of the support column frame 1 away from the side support column 301, and the second inspection mechanism 4 includes an inspection rod 401, the diameter of the inspection rod 401 is the same as the inner diameter of the pipe 5, and is used to be inserted into the pipe 5. When the pipe 5 is bent, the inspection rod 401 cannot be inserted further, thereby determining the stress bending condition of the pipe 5. The inspection rod 401 is installed with a sensor sheet 402, which is used to cooperate with the detector 403 to detect the moving distance of the inspection rod 401, thereby determining the bending position of the pipe 5.

[0037] A fixed curved rod 405 is fixed on one side of the support column frame 1, which is used to support the support platform 404, thereby achieving the function of supporting the inspection rod 401, so that the inspection rod 401 will not be skewed or fall off. A support platform 404 is installed on the fixed curved rod 405, which is used to support the inspection rod 401 and facilitate the sliding of the inspection rod 401. The inspection rod 401 is slidably set in the support platform 404.

[0038] Specifically, a detector 403 is installed on the supporting platform 404 for detecting the moving distance of the sensing sheet 402, thereby conveniently knowing the moving distance of the inspection rod 401. The moving distance of the inspection rod 401 can be used to determine the bending position of the pipe 5, thereby providing data for detecting the force on the pipe 5.

[0039] like Figure 10-11 As shown, a groove 406 is cut on the inspection rod 401 to provide space for installing a rack 407 to avoid affecting the insertion of the inspection rod 401 into the pipe 5. A plurality of evenly distributed racks 407 are installed on the side wall of the groove 406 to cooperate with the driving gear 411, so that the rotation of the driving gear 411 can drive the inspection rod 401 to slide, thereby facilitating the control of the inspection rod 401 to be inserted into the pipe 5.

[0040] A fixing bolt 408 is also fixed on the support column frame 1 for fixing the second driving motor 409 so that the second driving motor 409 will not shake or tilt, thereby ensuring the sliding stability of the inspection rod 401 .

[0041] like Figure 1-Figure 11 As shown, a second drive motor 409 is installed on the fixing bolt 408 to provide power for the sliding of the inspection rod 401. A transmission support shaft 410 is fixedly connected to the second drive motor 409, which is used to support the drive gear 411 and drive the drive gear 411 to rotate. The other end of the transmission support shaft 410 is installed with a drive gear 411 that meshes with a plurality of racks 407, which is used to drive the inspection rod 401 to slide, thereby enabling the inspection rod 401 to be inserted into the pipe 5.

[0042] When in use, the staff inserts the pipe 5 into the support column frame 1, and then fixes the pipe 5 through the upper clamping block 305 and the fastening bolt 306, and then controls the extension of the piston push rod 205 by driving the hydraulic cylinder 201, so that the piston push rod 205 can push the midpoint downward pressure test block 202 to move downward, thereby pressurizing the pipe 5. Before pressurization, by rotating the midpoint downward pressure test block 202, it is convenient to adjust the one-point pressurization and two-point pressurization of the pipe 5 to achieve different types of force tests; When the pipe 5 is pressed downward, the first drive motor 302 will also start, driving the drive screw 303 to rotate forward and reverse, so that the detection component 304 can slide back and forth, and the reciprocating slider 3041 will drive the ejector pin 3043 to move back and forth. When the pointer of the detection meter 3042 jumps, it means that the pipe 5 is bent and deformed. The degree of bending and deformation of the pipe 5 can also be judged by the jumping amplitude of the detection meter 3042, so as to realize the force detection during the pressurization process. After the pressurization is completed, the second drive motor 409 is started to drive the rotation of the drive gear 411, and then drive the movement of the inspection rod 401, so that the inspection rod 401 can be inserted into the pipe 5. When the pipe 5 is bent and deformed, the inspection rod 401 can no longer move forward. The detector 403 detects the distance moved by the inspection rod 401, and then determines the position of the pipe 5 that is bent by the force, thereby realizing the force detection after pressurization. Finally, the detection of the detection component 304 and the detector 403 is combined to determine the load-bearing capacity of the pipe 5.

[0043] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0044] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A mechanical material stress testing device, characterized in that: include: A support column frame, on which an intelligent controller is installed; A pressurizing driving mechanism is installed on the support column frame, and the pressurizing driving mechanism includes a driving hydraulic cylinder, a midpoint downward pressure test block is arranged below the driving hydraulic cylinder, side downward pressure test blocks are arranged on both sides of the midpoint downward pressure test block, the midpoint downward pressure test block is slightly higher than the pair of side downward pressure test blocks, the bottoms of the pair of side downward pressure test blocks are both chiseled with arc grooves, and the bottom of the midpoint downward pressure test block is chiseled with a cross groove; A first inspection mechanism is installed below the midpoint pressure test block, the first inspection mechanism comprises a side support column, a first drive motor is installed on the side support column, a drive screw is installed on the first drive motor, a detection component is threadedly connected to the drive screw, and a pipe is inserted between the side support column and the support column frame; The second inspection mechanism is arranged on a side of the support column frame away from the side support column. The second inspection mechanism includes an inspection rod, and a sensor sheet is installed on the inspection rod.

2. A mechanical material stress testing device according to claim 1, characterized in that: A sliding cavity is excavated on the support column frame, a pair of semicircular limiting clamps are arranged in the sliding cavity, and a driving bolt is connected to the pair of semicircular limiting clamps, and the driving bolt is threadedly connected to the support column frame.

3. A mechanical material stress testing device according to claim 2, characterized in that: A connecting bearing is fixedly connected between one end of the driving bolt arranged in the sliding cavity and a semicircular limiting clamping ring.

4. A mechanical material stress testing device according to claim 1, characterized in that: A plurality of connecting bent rods are fixedly connected between the midpoint downward pressure test block and a pair of side downward pressure test blocks.

5. A mechanical material stress testing device according to claim 1, characterized in that: A piston push rod is installed on the driving hydraulic cylinder, and a support bearing is fixedly connected between one end of the piston push rod away from the driving hydraulic cylinder and the midpoint downward pressure test block.

6. A mechanical material stress testing device according to claim 1, characterized in that: An upper clamping block is arranged on the side support column, and a hole is drilled on the side where the upper clamping block and the side support column are close to each other, and a plurality of fastening bolts are inserted on the upper clamping block, and the plurality of fastening bolts are threadedly connected to the side support column, and a fixed bearing is fixedly connected between the end of the driving screw away from the first driving motor and the support column frame.

7. A mechanical material stress testing device according to claim 1, characterized in that: The detection component includes a reciprocating slider, a detection table is installed on the reciprocating slider, a thimble is arranged on the detection table, a pair of limit grooves are drilled on the reciprocating slider, limit thin rods are inserted in the limit grooves, and the two ends of the pair of limit thin rods are respectively fixedly connected to the side support column and the support column frame.

8. A mechanical material stress testing device according to claim 1, characterized in that: A fixed bent rod is fixed on one side of the support column frame, a support platform is installed on the fixed bent rod, the inspection rod is slidably arranged in the support platform, and a detector is installed on the support platform.

9. A mechanical material stress testing device according to claim 1, characterized in that: A groove is cut on the inspection rod, and a plurality of evenly distributed racks are installed on the side wall of the groove.

10. A mechanical material stress testing device according to claim 9, characterized in that: A fixing bolt is also fixed on the support column frame, and a second driving motor is installed on the fixing bolt. A transmission support shaft is fixedly connected to the second driving motor, and a driving gear meshing with a plurality of racks is installed on the other end of the transmission support shaft.

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