Multi-angle quantitative torsion testing device suitable for tension-shear screw joint

Abstract

The invention relates to the technical field of screw joint test piece testing, and discloses a multi-angle quantitative torsion testing device suitable for a tension-shear screw joint, which comprises two transverse plates arranged in a frame body, round openings formed in the side walls of the two transverse plates, sleeves mounted in the round openings, opening binding parts arranged at the upper ends of the sleeves, and fixing heads arranged at the opening binding parts, a single-nail lap joint test piece is installed on the fixing head, a torsion mechanism is installed in the sleeve, the torsion mechanism is used for adjusting the angle of the fixing head to install the single-nail lap joint test piece and can provide lateral force to test the strength of the single-nail lap joint test piece after screw joint, and rectangular openings are formed in the two opposite sides of the frame body. According to the multi-angle quantitative torsion testing device suitable for the tension-shear screw joint, performance testing of a tension-shear complex force system can be carried out at a constant torsion angle or torque fixation under different-angle loading of the tension-shear screw joint, and researchers can conveniently carry out performance testing and analysis of quantitative tensile force and quantitative torsion angle.

Description

Technical Field

[0001] The invention relates to the technical field of screw-jointed specimen testing, in particular to a multi-angle quantitative torsion testing device suitable for tension-shear screw-jointed joints. Background Art

[0002] In order to evaluate the fatigue resistance and impact resistance of the joints such as the connection joints on the aircraft wings under the action of composite loads during flight, the corresponding test equipment is generally required to test the bolted joint specimens, so as to provide a basis for the design of the safety factor and service life of the joints of the aircraft load-bearing parts. In order to test the mechanical performance response of the bolted joints under complex loading environments, the uniaxial loading static test method and the multiaxial loading Hopkinson test method are usually used. The equipment used in the two experimental methods has the advantages of high loading accuracy, good loading repeatability, wide loading range and accurate data measurement. At the same time, the equipment used is composed of three major parts: mechanical structure, data acquisition system and control system. The three are used to complete the tensile, shear, torsion or tension-shear, tension-torsion composite loading experiments of the specimens at different strain rates. It can realize the static and dynamic mechanical properties of materials in different strain rate ranges without being restricted by the experimental equipment and the strict requirements on the specimen size, and effectively evaluate the mechanical behavior of the material in actual working conditions.

[0003] At present, during the tensile and shearing process of the specimen, the equipment performs a complex force system test under constant tensile force and variable torsion angle. The torsion of the specimen is a process of gradual reduction and recovery as the stretching proceeds. It is not a fixed quantitative test, and is not convenient for researchers to conduct performance testing and analysis under quantitative torsion. Therefore, in order to address this shortcoming, it is necessary to design a device suitable for tensile and shear bolted joints to be loaded with different constant tensile forces, and to be fixed with a constant torsion angle or torque to conduct performance testing under the constant value of the complex force system of tensile, torsion and shear, so as to facilitate researchers to conduct performance testing and analysis of the joint under the complex loading conditions of quantitative tensile force, quantitative eccentric load and quantitative torsion angle. Summary of the invention

[0004] 1. Technical issues to be solved

[0005] In view of the deficiencies in the prior art, the present invention provides a multi-angle quantitative torsion testing device suitable for tension-shear screwed joints, which solves the problem that the existing equipment performs a complex force system test with a variable torsion angle under a constant tensile force during the tension-shear process of the specimen. The torsion of the specimen is a process of gradual reduction and recovery as the stretching proceeds, which is not a fixed quantitative test and is not convenient for researchers to conduct performance testing and analysis under quantitative torsion.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a multi-angle quantitative torsion test device suitable for tension-shear screw joints, comprising a frame, two horizontal plates are arranged in the frame, the side walls of the two horizontal plates are both provided with round openings, sleeves are installed in the round openings, the upper end of the sleeve is provided with a constriction portion, the constriction portion is provided with a fixed head, and a single nail lap joint specimen is installed on the fixed head;

[0008] A torsion mechanism is installed in the sleeve, and the torsion mechanism is used to adjust the angle of the fixing head for installing the single-nail lap joint specimen, and can also provide lateral force to test the strength of the single-nail lap joint specimen after screw connection;

[0009] Rectangular openings are provided on two opposite sides of the frame, and pressurizing components are provided in the two rectangular openings;

[0010] The fixing head is a hollow structure, and a plurality of fixing holes are opened on the side wall of the fixing head, wherein two of the fixing holes are provided with pins for connecting the single-nail lap joint specimens, and a transverse axis is fixedly connected to the side wall of the fixing head, and the transverse axis is connected to the torsion mechanism;

[0011] The side wall of the frame is fixedly connected to two square frames, two positioning components are arranged between the two frames, and the two positioning components are symmetrically arranged on opposite sides of the frame. The side wall of the cross plate is fixedly connected to a bracket, and two partitions are fixedly connected in the sleeve, and an end cover is fixedly connected between the two partitions.

[0012] Preferably, the torsion mechanism includes a bracket, a slider is rotatably connected to the shaft wall of the transverse axis through a roller bearing, two sliding grooves are symmetrically provided on the side wall of the slider, and two through holes are provided in the clamping portion, the slider is slidably connected in the through holes through the sliding grooves, the lower end of the slider is fixedly connected to a support plate, one side of the support plate is rotatably connected to a first hydraulic cylinder through a pin shaft, the output end of the first hydraulic cylinder is rotatably connected to a rocker arm through a support shaft, the rocker arm is fixed on the shaft wall of the transverse axis, and a rotating assembly is installed on the bracket, and the rotating assembly is connected to the tube wall of the sleeve.

[0013] Preferably, the rotating assembly includes a gear ring, the side wall of the gear ring is fixed to the tube wall of the sleeve by bolts, the bracket is provided with a positioning portion, a clamping platform is formed between the positioning portion and the circular mouth, the constriction portion of the sleeve is provided with a boss, the constriction portion is clamped in the clamping platform through the boss, the bracket is fixedly connected with a reduction motor, the output end of the reduction motor passes through the side wall of the cross plate and is fixedly connected with a gear, and the gear is meshed with the gear ring.

[0014] Preferably, a slide rail is fixedly connected inside the sleeve, a slide bar is slidably connected inside the slide rail, the side wall of the slide bar is rotatably connected to multiple support rollers through a rotating shaft, the multiple support rollers are all in contact with the edge of the slide rail, and the slide bar is fixedly connected to one side of the support plate.

[0015] Preferably, a gear ring is fixedly connected to the shaft wall of the transverse axis, a rack is meshed on one side of the gear ring, the rack is fixed to one side of the partition, and the side wall of the partition is sleeved with the shaft wall of the transverse axis through a mounting port.

[0016] Preferably, the positioning assembly includes two rectangular blocks, two positioning rods are sleeved between the two rectangular blocks through positioning holes, the two ends of the two positioning rods are respectively fixedly connected to the side walls of the two square frames, one end of the bracket is provided with a mounting portion, one side of the mounting portion passes through the rectangular opening and is rotatably connected to two transmission rods through a rotating shaft, and the ends of the two transmission rods away from the mounting portion are rotatably connected to one end of the two rectangular blocks through connecting shafts.

[0017] Preferably, a sleeve is fixedly connected in the fixing hole, a cutout is provided on the side wall of the fixing head, a fixing plate is fixedly connected in the fixing head, two guide rods are sleeved on the side wall of the fixing plate through the guide hole, one end of the two guide rods are commonly fixedly connected to a clamping strip, the clamping strip is clamped between the two sleeves, a spring is sleeved on the rod wall of the guide rod, one end of the spring is fixedly connected to the fixing plate, the other end of the spring is fixedly connected to one side of the clamping strip, an electromagnetic push rod is fixedly connected to the side wall of the fixing plate, the output end of the electromagnetic push rod is fixedly connected to one side of the clamping strip, and an annular groove is provided on the side wall of the pin.

[0018] Preferably, the single-nail lap joint specimen is composed of two connecting plates with the same structure, and the side walls of the two connecting plates are each provided with a plurality of rivet holes, and the diameters of the plurality of rivet holes are increased successively.

[0019] Preferably, the pressurizing assembly includes a second hydraulic cylinder, the output end of the second hydraulic cylinder is fixedly connected to the side wall of one of the transverse plates, the base of the second hydraulic cylinder is fixedly connected to the side wall of the other transverse plate, a pressure sensor is installed at the connection between the base of the second hydraulic cylinder and the transverse plate, and extension parts are provided at both ends of the transverse plate, and the two extension parts are respectively slidably connected in the two rectangular openings.

[0020] Preferably, a plurality of guide columns are fixedly connected in the frame, and the side walls of the plurality of guide columns are each sleeved with two guide sleeves, wherein one of the guide sleeves is fixedly connected to the side wall of a horizontal plate located above, and the other guide sleeve is fixedly connected to the side wall of a horizontal plate located below.

[0021] (III) Beneficial effects

[0022] Compared with the prior art, the present invention provides a multi-angle quantitative torsion test device suitable for tension-shear screw joints, which has the following beneficial effects:

[0023] 1. First, select a suitable connecting piece, and according to the actual working conditions, insert the screw joint to be tested into the riveted hole and lock it. At this time, screw holes of different diameters can be selected according to the diameter of the screw joint. Then, the two connecting pieces can be combined into a single-nail lap joint specimen. The posture of the fixed head is adjusted by the power component in the torsion mechanism. After adjustment, one side of the fixed head on the upper and lower torsion mechanisms is at a parallel angle, that is, horizontal parallel and oblique parallel. When a pin is used for fixing, the inclination angle of the fixed head can be adjusted arbitrarily within the range of 0-45°. When in use, the pin is inserted into the fixing hole to fix the assembled single-nail lap joint specimen. Then, the pressurizing component can be started to adjust the distance between the two fixed heads. When the pressurizing component is working, the pressure sensor is used to measure the pressure applied by the pressurizing component. The measured pressure is the shear resistance of the screw joint; after the test, the loading force of the pressure component is canceled, the single-nail lap joint specimen is removed, and finally the postures of the two fixed heads are adjusted, that is, the inclined parallel fixed heads are adjusted to a horizontally parallel posture; then the single-nail lap joint specimen is re-fixed, and the torsion mechanism is started again to rotate the fixed head axially. At this time, the torsion resistance of the screw joint on the single-nail lap joint specimen between the connecting pieces can be measured; the pressure component is started again to move the two fixed heads away. At this time, the tensile force of the screw joint between the two connecting pieces can be measured by the pressure sensor, thereby realizing the testing of composite screw joints and metal screw joints, and the screw joints can be tested in multiple directions. At the same time, it is also convenient to adjust and fix the specimen during the test.

[0024] 2. The torsion mechanism provided in the present invention, when in use, starts the first hydraulic cylinder to push the rocker arm to swing, and the rocker arm swings and drives the transverse axis to swing in the axial direction, and drives the fixed head to swing when the transverse axis swings, so that the angle of the fixed head can be adjusted. In addition, when the transverse axis swings, it drives the gear ring to rotate, and the gear ring rolls on the rack when it rotates, so that the gear ring can be used to drive the transverse axis to move the slider, and when the fixed head swings from an inclined position to a horizontal position, the transverse axis moves to a position perpendicular to the center line of the casing, so that the single-nail lap joint specimen is installed as close to the center of the casing as possible to ensure that the single-nail lap joint specimen is evenly stressed. At the same time, when it is necessary to test the axial force, start the reduction motor to rotate and drive the gear to rotate the gear ring, and the rotation of the gear ring drives the casing to rotate, and the rotation of the casing drives the fixed head to rotate. Since the single-nail lap joint specimen is at the center, the torsional force of the screw joint on the connecting piece can be tested at this time.

[0025] 3. The pressurizing assembly and positioning assembly provided in the present invention, when in use, start the second hydraulic cylinder to work, and its piston rod can push the two cross plates to be subjected to force at the same time when it is extended. At this time, the fixed positioning rod limits the moving direction of the rectangular block, that is, it can only move laterally on the positioning rod. At this time, when the cross plate moves, it drives the transmission rod to be subjected to force, and when the transmission rod is subjected to force, it pulls the rectangular block to slide on the positioning rod, so that the positioning rod, the rectangular block and the transmission rod can be used to limit the relative synchronous movement of the two cross plates, so that the torque of the second hydraulic cylinder acts evenly on the two cross plates. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the structure of a multi-angle quantitative torsion test device for tension-shear screw joints proposed by the present invention;

[0027] Figure 2 The structure diagram of the torsion mechanism in the multi-angle quantitative torsion test device for tension-shear screw joints proposed by the present invention is shown in FIG. Figure 1 ;

[0028] Figure 3 The structure diagram of the torsion mechanism in the multi-angle quantitative torsion test device for tension-shear screw joints proposed by the present invention is shown in FIG. Figure 2 ;

[0029] Figure 4 The structure diagram of the torsion mechanism in the multi-angle quantitative torsion test device for tension-shear screw joints proposed by the present invention is shown in FIG. Figure 3 ;

[0030] Figure 5 This is a structural schematic diagram of a cross plate, a bracket and a sleeve in a multi-angle quantitative torsion test device for a tension-shear screw joint proposed by the present invention;

[0031] Figure 6 The structure of the torsion mechanism and the single nail lap joint specimen in the multi-angle quantitative torsion test device for tension-shear bolted joints proposed by the present invention is shown in FIG. Figure 1 ;

[0032] Figure 7 The structure of the torsion mechanism and the single nail lap joint specimen in the multi-angle quantitative torsion test device for tension-shear screw joints proposed by the present invention is shown in FIG. Figure 2 ;

[0033] Figure 8 This is a schematic diagram of the structure of a single nail overlap specimen in a multi-angle quantitative torsion test device for tension-shear screw joints proposed by the present invention;

[0034] Fig. 9 A cross-sectional view of a fixing head in a multi-angle quantitative torsion test device for tension-shear screw joints proposed by the present invention;

[0035] Fig.10 This is a schematic diagram of the structure of a cross plate, a guide column and a guide sleeve in a multi-angle quantitative torsion test device for a tension-shear screw joint proposed by the present invention;

[0036] Fig.11 The invention provides a multi-angle quantitative torsion test device for tension-shear screw joints. Figure 1 A front view of

[0037] Fig.12 The present invention provides a structural schematic diagram of a positioning assembly in a multi-angle quantitative torsion testing device for tension-shear screw joints.

[0038] In the figure: 1. sleeve; 2. frame; 3. square frame; 4. mounting part; 5. second hydraulic cylinder; 6. transmission rod; 7. positioning rod; 8. rectangular block; 9. fixed head; 10. reduction motor; 11. guide sleeve; 12. guide column; 13. single nail lap joint specimen; 14. cross plate; 15. slider; 16. bracket; 17. gear ring; 18. horizontal axis; 19. gear; 20. support plate; 21. first hydraulic cylinder; 22. partition; 23. support roller; 24. slide rail; 25. rack; 26. rocker arm; 27. gear ring; 28. boss; 29. ​​slide bar; 30. card table; 31. pressure sensor; 32. cutout; 33. fixed plate; 34. guide rod; 35. electromagnetic push rod; 36. spring; 37. card strip; 38. pin; 39. sleeve. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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 are within the scope of protection of the present invention.

[0040] Embodiment 1: refer to the attached Figure 1-12,A multi-angle quantitative torsion test device suitable for tension-shear screw joints, comprising a frame 2, two horizontal plates 14 are arranged in the frame 2, the side walls of the two horizontal plates 14 are provided with circular openings, a sleeve 1 is installed in the circular opening, a tie mouth is arranged at the upper end of the sleeve 1, a fixing head 9 is arranged at the tie mouth, a single nail lap joint specimen 13 is installed on the fixing head 9, the single nail lap joint specimen 13 is composed of two connecting pieces with the same structure, the side walls of the two connecting pieces are provided with a plurality of rivet holes, the diameters of the plurality of rivet holes are increased successively, the connecting pieces are U-shaped and straight plate structures, a torsion mechanism is installed in the sleeve 1, the torsion mechanism is used to adjust the angle of the fixing head 9 for installing the single nail lap joint specimen 13, and can also provide lateral force to test the strength of the single nail lap joint specimen 13 after being screwed, rectangular openings are opened on opposite sides of the frame 2, and pressurizing components are arranged in the two rectangular openings;

[0041] The fixing head 9 is a hollow structure, and a plurality of fixing holes are provided on the side wall of the fixing head 9, wherein two fixing holes are provided with pins 38 for connecting the single nail lap joint specimen 13, and a sleeve 39 is fixedly connected in the fixing hole, and a cutout 32 is provided on the side wall of the fixing head 9, and the cutout 32 is used to install the connecting piece of the straight plate structure, and the connecting piece of the U-shaped structure is installed on both sides of the fixing head 9, and a fixing plate 33 is fixedly connected in the fixing head 9, and two guide rods 34 are sleeved on the side wall of the fixing plate 33 through the guide hole, and a clamping strip 37 is fixedly connected to one end of the two guide rods 34, and the clamping strip 37 is clamped between the two sleeves 39, and a spring 36 is sleeved on the rod wall of the guide rod 34, and one end of the spring 36 It is fixedly connected to the fixed plate 33, the other end of the spring 36 is fixedly connected to one side of the clamping strip 37, the side wall of the fixed plate 33 is fixedly connected with an electromagnetic push rod 35, the output end of the electromagnetic push rod 35 is fixedly connected to one side of the clamping strip 37, the side wall of the pin 38 is provided with an annular groove, the side wall of the fixed head 9 is fixedly connected with a transverse axis 18, the transverse axis 18 is connected to the torsion mechanism, the side wall of the frame 2 is fixedly connected with two square frames 3, two positioning assemblies are arranged between the two square frames 3, and the two positioning assemblies are symmetrically arranged on opposite sides of the frame 2, the side wall of the transverse plate 14 is fixedly connected with a bracket 16, two partitions 22 are fixedly connected in the sleeve 1, and an end cover is fixedly connected between the two partitions 22.

[0042] The present invention is operated in the following manner when used;

[0043] Step 1: First, select a suitable connecting piece, insert the screw joint to be tested into the rivet hole according to the actual working conditions and tighten it, and use two connecting pieces to form a single nail lap joint test piece 13;

[0044] Step 2: Adjust the posture of the fixed head 9, such as Figure 1 and Figure 6 The 3 common postures shown in the figure are adjusted so that one side of the fixed head 9 on the upper and lower torsion mechanisms is at a parallel angle;

[0045] Step 3: Start the pressurizing assembly to adjust the distance between the two fixing heads 9, and use the pin 38 to penetrate into the fixing hole to fix the assembled single nail lap joint specimen 13;

[0046] Step 4: Start the pressurizing assembly to change the distance between the two fixing heads 9, and use the pressure sensor 31 to measure the pressure applied by the pressurizing assembly. The measured pressure is the shear resistance of the screw joint.

[0047] Step 5, cancel the loading force of the pressurizing assembly, remove the single nail lap joint specimen 13, and finally adjust the postures of the two fixing heads 9 and re-fix the single nail lap joint specimen 13;

[0048] Step 6: Start the torsion mechanism again to rotate the fixed head 9 in the axial direction. At this time, the torsion resistance of the screw joint on the single nail lap joint specimen 13 acting between the connecting pieces can be measured;

[0049] Step 7: Start the pressurizing assembly again to move the two fixing heads 9 away from each other. At this time, the tensile force of the threaded joint between the two connecting pieces can be measured by the pressure sensor 31.

[0050] Based on the above operation steps, a non-contact DIC test system is equipped to perform dynamic monitoring of stress and strain of the tension-shear joint under different fixed torsion angles. This technology has been widely used in life and is already known to those skilled in the art, so it will not be described in detail. First, a suitable connecting piece is selected, and the screw joint to be tested is inserted into the rivet hole and locked according to the actual working conditions. At this time, screw holes of different diameters can be selected according to the diameter of the screw joint. After that, the two connecting pieces can be combined into a single nail lap joint test piece 13, and the posture of the fixed head 9 is adjusted by the power component in the torsion mechanism, such as Figure 1 and Figure 6The three common postures shown in the figure are adjusted so that one side of the fixing heads 9 on the upper and lower torsion mechanisms are at a parallel angle, that is, horizontal parallel and oblique parallel, and when a pin 38 is used for fixing, the inclination angle of the fixing head 9 can be arbitrarily adjusted within the range of 0-45°. The pin 38 is inserted into the fixing hole to fix the assembled single nail lap joint specimen 13, and then the pressurizing component can be started to adjust the distance between the two fixing heads 9. When the pressurizing component is working, the pressure applied by the pressurizing component is measured by the pressure sensor 31. The measured pressure is the shear resistance of the screw joint. After the test, the loading force of the pressurizing component is canceled, the single nail lap joint specimen 13 is removed, and the postures of the two fixing heads 9 are adjusted, that is, the oblique parallel fixing heads 9 are adjusted to the horizontal parallel posture, and then the pressure sensor 31 is used to measure the pressure applied by the pressurizing component ... pressure sensor 31 is used to measure the pressure applied by the pressurizing component. The measured pressure is the shear resistance of the screw joint. After the test, the loading force of the pressurizing component is canceled, the single nail lap joint specimen 13 is removed, and the postures of the two fixing heads 9 are adjusted, that is, the oblique parallel fixing heads 9 are adjusted to the horizontal parallel posture, and then the pressure sensor 31 is used to measure the pressure applied by the pressurizing component. After the pressure sensor 31 is used to measure the pressure applied by the pressurizing component, the pressure sensor 31 is used to measure the pressure applied Fix the single-nail lap joint specimen 13, start the torsion mechanism again, and rotate the fixing head 9 axially. At this time, the torsion resistance of the screw joint on the single-nail lap joint specimen 13 between the connecting pieces can be measured. Start the pressurizing assembly again to move the two fixing heads 9 away from each other. At this time, the tensile force of the screw joint between the two connecting pieces can be measured by the pressure sensor 31, so that the composite screw joint test and the metal screw joint test can be realized, and the screw joint can be tested in multiple directions. At the same time, it is also convenient to adjust and fix the specimen during the test, so that the tensile-shear screw joint can be loaded at different angles, and the performance test of the tensile-torsion-shear complex force system can be performed with a constant torsion angle or torque fixation, which is convenient for researchers to perform quantitative tensile force and quantitative torsion angle performance testing and analysis.

[0051] Embodiment 2: Based on embodiment 1, the difference is that;

[0052] See attached Figure 2-7 The torsion mechanism includes a bracket 16, a slider 15 is rotatably connected to the shaft wall of the transverse shaft 18 through a roller bearing, two slide grooves are symmetrically opened on the side wall of the slider 15, and two through holes are opened at the confinement portion. The slider 15 is slidably connected in the through hole through the slide groove, and the lower end of the slider 15 is fixedly connected to a support plate 20, and one side of the support plate 20 is rotatably connected to a first hydraulic cylinder 21 through a pin shaft, and the output end of the first hydraulic cylinder 21 is rotatably connected to a rocker arm 26 through a support shaft, and the rocker arm 26 is fixed on the shaft wall of the transverse shaft 18. A rotating component is installed on the bracket 16, and the rotating component is connected to the pipe wall of the sleeve 1.

[0053] The rotating assembly includes a gear ring 17, the side wall of the gear ring 17 is fixed to the tube wall of the sleeve 1 by bolts, a positioning portion is provided on the bracket 16, a clamping table 30 is formed between the positioning portion and the round mouth, a boss 28 is provided at the constriction portion of the sleeve 1, and the constriction portion is clamped in the clamping table 30 through the boss 28, a reduction motor 10 is fixedly connected to the bracket 16, and the output end of the reduction motor 10 passes through the side wall of the horizontal plate 14 and is fixedly connected to a gear 19, which meshes with the gear ring 17, and the sleeve 1 is fixed inside. A slide rail 24 is fixedly connected, a slide bar 29 is slidably connected inside the slide rail 24, and the side wall of the slide bar 29 is rotatably connected to multiple support rollers 23 through a rotating shaft. The multiple support rollers 23 are all in contact with the edge of the slide rail 24, and the slide bar 29 is fixedly connected to one side of the support plate 20. A gear ring 27 is fixedly connected to the shaft wall of the transverse axis 18, and a rack 25 is meshed with one side of the gear ring 27. The rack 25 is fixed on one side of the partition 22, and the side wall of the partition 22 is sleeved with the shaft wall of the transverse axis 18 through the installation port.

[0054] The torsion mechanism provided in the present invention, when in use, starts the first hydraulic cylinder 21 to work and pushes the rocker arm 26 to swing, and when the rocker arm 26 swings, it drives the horizontal shaft 18 to swing in the axial direction, and when the horizontal shaft 18 swings, it drives the fixed head 9 to swing, so that the angle of the fixed head 9 can be adjusted. In addition, when the horizontal shaft 18 swings, it drives the ring gear 27 to rotate, and when the ring gear 27 rotates, it rolls on the rack 25, so that the ring gear 27 can drive the horizontal shaft 18 to move the slider 15, as shown in FIG. Figure 6 As shown, when the fixing head 9 swings from an inclined position to a horizontal position, the horizontal axis 18 moves to a position perpendicular to the center line of the casing 1, so that the installed single-nail lap joint specimen 13 is as close to the center of the casing 1 as possible, ensuring that the single-nail lap joint specimen 13 is evenly stressed. At the same time, when it is necessary to test the axial force, the reduction motor 10 is started to rotate and drive the gear 19 to rotate the gear ring 17. The rotation of the gear ring 17 drives the casing 1 to rotate. When the casing 1 rotates, it drives the fixing head 9 to rotate. Since the single-nail lap joint specimen 13 is at the center, the torsional force of the screw joint acting on the connecting piece can be tested at this time.

[0055] Embodiment 3: Based on embodiment 1, the difference is that;

[0056] See attached Figure 10-12The pressurizing component includes a second hydraulic cylinder 5, the output end of the second hydraulic cylinder 5 is fixedly connected to the side wall of one of the horizontal plates 14, the base of the second hydraulic cylinder 5 is fixedly connected to the side wall of the other horizontal plate 14, and a pressure sensor 31 is installed at the connection between the base of the second hydraulic cylinder 5 and the horizontal plate 14. Both ends of the horizontal plate 14 are provided with extensions, and the two extensions are respectively slidably connected in the two rectangular openings. A plurality of guide columns 12 are fixedly connected in the frame 2, and the side walls of the plurality of guide columns 12 are sleeved with two guide sleeves 11, one of the guide sleeves 11 is fixedly connected to the side wall of a horizontal plate 14 located above, and the other guide sleeve 11 is fixedly connected to the side wall of a horizontal plate 14 located below.

[0057] The positioning assembly includes two rectangular blocks 8, two positioning rods 7 are sleeved between the two rectangular blocks 8 through positioning holes, the two ends of the two positioning rods 7 are fixedly connected to the side walls of the two square frames 3 respectively, and a mounting portion 4 is provided at one end of the bracket 16. One side of the mounting portion 4 passes through the rectangular opening and is rotatably connected to two transmission rods 6 through a rotating shaft. The ends of the two transmission rods 6 away from the mounting portion 4 are rotatably connected to one end of the two rectangular blocks 8 respectively through a connecting shaft.

[0058] The pressurizing component and positioning component provided in the present invention, when in use, start the second hydraulic cylinder 5 to work, and its piston rod can push the two cross plates 14 to be subjected to force at the same time when it is extended. At this time, the fixed positioning rod 7 limits the moving direction of the rectangular block 8, that is, it can only move horizontally on the positioning rod 7. At this time, when the cross plate 14 moves, it drives the transmission rod 6 to be subjected to force. When the transmission rod 6 is subjected to force, it pulls the rectangular block 8 to slide on the positioning rod 7, so that the positioning rod 7, the rectangular block 8 and the transmission rod 6 can be used to limit the relative synchronous movement of the two cross plates 14, so that the torque of the second hydraulic cylinder 5 acts evenly on the two cross plates 14.

[0059] It should be noted that the term "comprises" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also includes other elements that are not explicitly listed, or also includes elements inherent to such process, method, article, or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article, or device that includes the element.

[0060] 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 multi-angle quantitative torsion test device for tension-shear-screw joints, comprising a frame (2), characterized in that: Two transverse plates (14) are arranged in the frame (2), and the side walls of the two transverse plates (14) are both provided with circular openings, and a sleeve (1) is installed in the circular opening, and a constriction portion is arranged at the upper end of the sleeve (1), and a fixing head (9) is arranged in the constriction portion, and a single nail overlap test piece (13) is installed on the fixing head (9); A torsion mechanism is installed in the sleeve (1), and the torsion mechanism is used to adjust the angle of the fixing head (9) for installing the single-nail lap joint specimen (13), and can also provide a lateral force test on the strength of the single-nail lap joint specimen (13) after being screwed; The frame (2) has rectangular openings on two opposite sides, and pressure components are arranged in the two rectangular openings; The fixing head (9) is a hollow structure, and a plurality of fixing holes are provided on the side wall of the fixing head (9), wherein two of the fixing holes are provided with pins (38) for connecting the single-nail overlapped test piece (13), and a transverse axis (18) is fixedly connected to the side wall of the fixing head (9), and the transverse axis (18) is connected to the torsion mechanism; Two square frames (3) are fixedly connected to the side walls of the frame (2), two positioning components are arranged between the two square frames (3), and the two positioning components are symmetrically arranged on opposite sides of the frame (2). A bracket (16) is fixedly connected to the side walls of the cross plate (14), and two partitions (22) are fixedly connected inside the sleeve (1), and an end cover is fixedly connected between the two partitions (22).

2. A multi-angle quantitative torsion test device for tension-shear screw joints according to claim 1, characterized in that: The torsion mechanism comprises a bracket (16), a slider (15) is rotatably connected to the shaft wall of the transverse shaft (18) via a roller bearing, two slide grooves are symmetrically provided on the side wall of the slider (15), two through holes are provided on the constriction opening, the slider (15) is slidably connected in the through holes via the slide grooves, a support plate (20) is fixedly connected to the lower end of the slider (15), a first hydraulic cylinder (21) is rotatably connected to one side of the support plate (20) via a pin shaft, an output end of the first hydraulic cylinder (21) is rotatably connected to a rocker arm (26) via a support shaft, the rocker arm (26) is fixed to the shaft wall of the transverse shaft (18), a rotating assembly is installed on the bracket (16), and the rotating assembly is connected to the tube wall of the sleeve (1).

3. A multi-angle quantitative torsion test device for tension-shear screw joints according to claim 2, characterized in that: The rotating assembly comprises a gear ring (17), the side wall of which is fixed to the tube wall of the sleeve (1) by bolts, a positioning portion is provided on the bracket (16), a clamping platform (30) is formed between the positioning portion and the circular opening, a boss (28) is provided at the constriction portion of the sleeve (1), the constriction portion is clamped in the clamping platform (30) through the boss (28), a reduction motor (10) is fixedly connected to the bracket (16), the output end of the reduction motor (10) passes through the side wall of the transverse plate (14) and is fixedly connected to a gear (19), and the gear (19) is meshed with the gear ring (17).

4. The multi-angle quantitative torsion test device for tension-shear screw joints according to claim 2, characterized in that: A slide rail (24) is fixedly connected inside the sleeve (1), a slide bar (29) is slidably connected inside the slide rail (24), a side wall of the slide bar (29) is rotatably connected to a plurality of support rollers (23) via a rotating shaft, the plurality of support rollers (23) are in contact with the edge of the slide rail (24), and the slide bar (29) is fixedly connected to one side of the support plate (20).

5. The multi-angle quantitative torsion test device for tension-shear screw joints according to claim 1, characterized in that: A gear ring (27) is fixedly connected to the shaft wall of the transverse shaft (18), a rack (25) is meshed on one side of the gear ring (27), the rack (25) is fixed on one side of the partition (22), and the side wall of the partition (22) is sleeved with the shaft wall of the transverse shaft (18) through a mounting opening.

6. The multi-angle quantitative torsion test device for tension-shear screw joints according to claim 1, characterized in that: The positioning assembly comprises two rectangular blocks (8), two positioning rods (7) are sleeved between the two rectangular blocks (8) through positioning holes, the two ends of the two positioning rods (7) are respectively fixedly connected to the side walls of the two square frames (3), one end of the bracket (16) is provided with a mounting portion (4), one side of the mounting portion (4) passes through the rectangular opening and is rotatably connected to two transmission rods (6) through a rotating shaft, and the ends of the two transmission rods (6) away from the mounting portion (4) are rotatably connected to one end of the two rectangular blocks (8) through a connecting shaft.

7. The multi-angle quantitative torsion test device for tension-shear screw joints according to claim 1, characterized in that: A sleeve (39) is fixedly connected in the fixing hole, a cutout (32) is provided on the side wall of the fixing head (9), a fixing plate (33) is fixedly connected in the fixing head (9), two guide rods (34) are sleeved on the side wall of the fixing plate (33) through the guide hole, one end of the two guide rods (34) are fixedly connected to a clamping strip (37), the clamping strip (37) is clamped between the two sleeves (39), a spring (36) is sleeved on the rod wall of the guide rod (34), one end of the spring (36) is fixedly connected to the fixing plate (33), and the other end of the spring (36) is fixedly connected to one side of the clamping strip (37), an electromagnetic push rod (35) is fixedly connected to the side wall of the fixing plate (33), the output end of the electromagnetic push rod (35) is fixedly connected to one side of the clamping strip (37), and an annular groove is provided on the side wall of the pin (38).

8. The multi-angle quantitative torsion test device for tension-shear screw joints according to claim 1, characterized in that: The single-nail lap joint test piece (13) is composed of two connecting plates with the same structure, and the side walls of the two connecting plates are each provided with a plurality of rivet holes, and the diameters of the plurality of rivet holes are increased in sequence.

9. The multi-angle quantitative torsion test device for tension-shear screw joints according to claim 1, characterized in that: The pressurizing component comprises a second hydraulic cylinder (5), the output end of the second hydraulic cylinder (5) is fixedly connected to the side wall of one of the transverse plates (14), the base of the second hydraulic cylinder (5) is fixedly connected to the side wall of the other transverse plate (14), a pressure sensor (31) is installed at the connection between the base of the second hydraulic cylinder (5) and the transverse plate (14), and extension parts are provided at both ends of the transverse plate (14), and the two extension parts are respectively slidably connected in the two rectangular openings.

10. The multi-angle quantitative torsion test device for tension-shear screw joints according to claim 1, characterized in that: A plurality of guide columns (12) are fixedly connected inside the frame (2), and the side walls of the plurality of guide columns (12) are sleeved with two guide sleeves (11), one of the guide sleeves (11) is fixedly connected to the side wall of a horizontal plate (14) located above, and the other guide sleeve (11) is fixedly connected to the side wall of a horizontal plate (14) located below.

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