A metal compression-torsion testing device

Abstract

The utility model discloses a kind of metal compression-torsion test devices, it is related to metal compression-torsion test technical field, including support structure, including base and torsion resistance support frame, torsion resistance support frame includes stand and the upper crossbeam and lower crossbeam of setting in the upper and lower both ends of stand;Loading structure, including force loading oil cylinder, force loading oil cylinder is fixed in upper crossbeam;Torque output structure, including main shaft, servo motor and speed reducer, the output shaft of speed reducer is vertically rotationally set in the upper portion of base, the upper end portion of the output shaft of speed reducer is connected main shaft through hollow shaft coupling, main shaft penetrates lower crossbeam and stretches into the upper portion of lower crossbeam, main shaft and the piston rod of force loading oil cylinder are set in same axial line, and torque sensor is equipped on main shaft;Die structure, including upper die and lower die, upper die is fixed in the lower end portion of the piston rod of force loading oil cylinder, and lower die is fixed in the upper end portion of main shaft. Existing testing machine loading force is insufficient and measuring data mutual interference, leading to the problem of low measurement accuracy.

Description

Technical Field

[0001] This utility model relates to the field of metal compression and torsion testing technology, specifically a metal compression and torsion testing device. Background Technology

[0002] When studying the compressive and torsional properties of materials, appropriate test molds and equipment are required. Existing technologies already have molds for compressive and torsional testing; for example, Chinese Patent No. CN201897552U provides a test mold for the torsional springback characteristics of stamped steel plates.

[0003] Some compression-torsion testing machines exist on the market, such as the vertical compression-torsion testing machine disclosed in Chinese patent CN 212300812 U. However, this machine uses a motor-driven lead screw to apply axial pressure. This driving method provides very limited loading force and is generally only suitable for testing low-stiffness, low-strength components such as springs. It cannot meet the higher axial pressure requirements for testing metallic materials, especially high-strength steel and high-temperature alloys. Furthermore, this machine stacks torque sensors, pressure sensors, and upper pressure plates in series. In this structure, the enormous axial pressure acts directly on and passes through the housing of the torque sensor, while the reaction force of the torsional load must also pass through the structure of the pressure sensor. This results in severe coupling interference between the axial and torsional loading channels. That is, the applied pressure affects the torque reading, and the applied torque also interferes with the pressure measurement, thus compromising the purity and accuracy of the test data. Utility Model Content

[0004] The purpose of this invention is to provide a metal compression and torsion testing device to solve the problems mentioned in the background art, such as insufficient loading force and mutual interference of measurement data in existing testing machines, which lead to low measurement accuracy.

[0005] To solve the above-mentioned technical problems, this utility model provides a metal compression-torsion testing device, comprising: A support structure includes a base and an anti-torsion support frame fixedly disposed on the upper part of the base. The anti-torsion support frame includes an upright and an upper crossbeam and a lower crossbeam disposed at the upper and lower ends of the upright. The loading structure includes a force loading cylinder, which is fixedly mounted on the upper part of the upper crossbeam, and the lower end of the piston rod of the force loading cylinder extends through the upper crossbeam to the lower part of the upper crossbeam. The torque output structure includes a main shaft, a servo motor, and a reducer connected to the output shaft of the servo motor. The output shaft of the reducer is vertically rotatably mounted on the upper part of the base. The upper end of the output shaft of the reducer is connected to the main shaft through a hollow coupling. The main shaft extends through the lower crossbeam to the upper part of the lower crossbeam. The main shaft and the piston rod of the force loading cylinder are arranged on the same axis. A torque sensor is provided on the main shaft. The mold structure includes an upper mold and a lower mold, wherein the upper mold is fixed to the lower end of the piston rod of the force-loading cylinder, and the lower mold is fixed to the upper end of the main shaft.

[0006] Based on the above technical solution, the present invention is further described as follows: the lower crossbeam is provided with a rotation limiting hole that cooperates with the main shaft, the lower end of the rotation limiting hole is provided with a first bearing, and the upper end of the rotation limiting hole is provided with a thrust self-aligning roller bearing.

[0007] As a further optimization of this utility model, the torque sensor is disposed between the thrust self-aligning roller bearing and the first bearing.

[0008] As a further optimization of this utility model, a control structure is also included, which is connected and configured with the force loading cylinder and the servo motor.

[0009] As a further optimization of this utility model, the force loading cylinder is provided with a circumferential anti-rotation structure that cooperates with the piston rod of the force loading cylinder.

[0010] As a further optimization of this utility model, the circumferential anti-rotation structure includes a limiting straight rod, the upper crossbeam is provided with a guide hole adapted to the outer periphery of the piston rod of the force loading cylinder, the limiting straight rod is vertically arranged on the inner wall of the guide hole, and the outer periphery of the piston rod of the force loading cylinder is provided with an anti-rotation guide groove adapted to the limiting straight rod.

[0011] Compared with the prior art, the beneficial effects of this utility model are: This invention provides rigid support and spatial positioning for the entire device through a support structure; achieves axial loading capacity with large loads through a loading structure; applies controllable torsional loads to metal specimens through a torque output structure, while simultaneously acquiring torque signals in real time and providing feedback on torque changes during the test; ensures reliable connection and positioning between the metal specimen, loading structure, and torque output structure through a mold structure; and coordinates the axial pressure of the loading structure and the circumferential torque of the torque output structure through a control structure, achieving automated control of the test process, real-time acquisition and recording of test data, and preliminary processing. Furthermore, the circumferential anti-rotation structure eliminates potential rotational interference from torsional loads on the loading structure, effectively preventing rotational deviation during loading and ensuring consistent axial loading direction, thus improving the stability and experimental accuracy of combined compression and torsion loading. This significantly increases the device's load-bearing capacity and enhances the measurement accuracy and reliability of test data under combined loading conditions. Attached Figure Description

[0012] Figure 1 A schematic diagram of the overall structure of a metal compression-torsion testing device; Figure 2 A schematic diagram of the force loading structure of a metal compression-torsion testing device; Figure 3 A schematic diagram of the torque output structure of a metal compression-torsion testing device; Figure 4 A schematic diagram of the circumferential anti-rotation structure of a metal compression-torsion testing device; Figure 5 This is a schematic diagram of the control structure of a metal compression and torsion testing device.

[0013] In the diagram: 1-support structure, 11-base, 12-anti-torsion support frame, 121-upright frame, 122-upper crossbeam, 1221-guide hole, 123-lower crossbeam, 1231-rotation limit hole; 2-Loading structure, 21-Force loading cylinder, 211-Anti-rotation guide straight groove; 3-Torque output structure, 31-Main shaft, 32-Servo motor, 33-Reducer, 311-First bearing, 312-Thrust self-aligning roller bearing, 313-Torque sensor; 4-Mold structure, 41-Upper mold, 42-Lower mold, 43-Upper mold base, 44-Lower mold base; 5-Control structure; 6-Circumferential anti-rotation structure, 61-Limiting straight rod. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figures 1-5 This utility model provides a metal compression-torsion testing device, including a support structure 1, a loading structure 2, a torque output structure 3, a mold structure 4, a control structure 5, and a circumferential anti-rotation structure 6. The support structure 1 provides rigid support and spatial positioning for the entire device; the loading structure 2 enables axial loading of large loads; the torque output structure 3 applies controllable torsional loads to the metal specimen, simultaneously acquiring torque signals in real time to provide feedback on torque changes during the test; and the mold structure 4 ensures reliable connection between the metal specimen and the loading structure 2 and torque output structure 3. The positioning function is used to coordinate the axial pressure of the loading structure 2 and the circumferential torque of the output structure 3 through the control structure 5, so as to realize the automated control of the test process. At the same time, it can collect, record and perform preliminary processing of test data in real time. In addition, with the help of the circumferential anti-rotation structure 6, the rotational interference that torsional load may cause to the loading structure 2 is eliminated, effectively preventing the rotational deviation of the loading structure 2 during the loading process, ensuring the consistency of the axial loading direction, and improving the stability and experimental accuracy of the pressure-torsion composite loading. It greatly improves the load-bearing range of the device and improves the measurement accuracy and reliability of test data under composite loading conditions.

[0016] For details, please refer to the appendix. Figure 1 and attached Figure 2The support structure 1 includes a base 11 and an anti-torsion support frame 12 fixedly mounted on the upper part of the base 11. The anti-torsion support frame 12 includes a vertical frame 121 and an upper crossbeam 122 and a lower crossbeam 123 located at the upper and lower ends of the vertical frame 121. The upper crossbeam 122 is used to fix the loading structure 2, and the lower crossbeam 123 is used to fix the limiting torque output structure 3. In this embodiment, the base 11 can be, but is not limited to, integrally cast or a heavy-duty box structure welded from multiple base plates and vertical steel plates. The bottom of the base 11 is provided with leveling feet or anchor bolt holes to allow for horizontal adjustment and stable positioning of the device during installation. The interior of the base 11 is provided with a torque output structure. The base 11 has a space for mounting and fixing the structure 3, and mounting holes for the output shaft of the torque output structure 3 to extend out. The upper surface of the base 11 is set as a flat surface for mounting the anti-torsion support. The upper crossbeam 122 and the lower crossbeam 123 can be, but are not limited to, metal beam structures, and their upper and lower surfaces are machined to be horizontal to ensure the coaxiality and parallelism of the loading structure 2 and the torque output structure 3. The upright frame 121 adopts an upright plate structure, and two sets of upright frames 121 are symmetrically arranged on the upper part of the base 11. The upper ends are fixed to the two sides of the upper crossbeam 122 by bolts, and the lower ends can be fixed to the base 11 by bolt connection, welding, or direct integral casting to form a high-rigidity integral frame structure. The lower crossbeam 123 is horizontally fixed between the lower ends of the upright frame 121 by bolts. Through the rigid connection between the upper and lower crossbeams 123, the upright frame 121 and the base 11, an anti-torsion support frame 12 is formed, thereby effectively suppressing structural deformation during loading and ensuring the accuracy and stability of the transmission of axial pressure and torsional load.

[0017] Please refer to the attached document. Figure 2 The loading structure 2 includes a force loading cylinder 21, which is fixed to the middle of the upper side of the upper crossbeam 122 by bolts or flanges to withstand the reverse tensile force during loading. The lower end of the piston rod of the force loading cylinder 21 extends through the upper crossbeam 122 to the lower part of the upper crossbeam 122. In this embodiment, the force loading cylinder 21 can be, but is not limited to, a servo-controlled hydraulic cylinder, which is equipped with a servo pump. The servo pump is connected to the control structure 5. The effective stroke of the force loading cylinder 21 is 200 mm, thereby realizing the continuous adjustment of the loading force within the range of 0 to 200 T. The lower end of the piston rod of the force loading cylinder 21 is provided with a connecting flange or threaded interface to realize the connection function with the mold structure 4, so as to realize the function of applying a controllable large-tonnage axial compressive load to the metal specimen through the force loading cylinder 21. Compared with the motor screw loading method in the prior art, it greatly improves the maximum axial loading capacity of the whole machine and the controllability of the loading force.

[0018] Please refer to the attached document. Figure 3The torque output structure 3 includes a main shaft 31, a servo motor 32, and a reducer 33 connected to the output shaft of the servo motor 32. The main shaft 31 is rotatably mounted on the lower crossbeam 123. The servo motor 32 is fixedly mounted on the base 11 by bolts. The servo motor 32 is electrically connected to the control structure 5. The servo motor 32 can be, but is not limited to, Peaco. The PEACO-180ST-M19015 servo motor 32 has its output shaft connected to the input end of reducer 33. The servo motor 32 can be, but is not limited to, PKF12RF07-727. The reducer motor is fixedly installed in the corresponding mounting hole of the base 11. The output shaft of the reducer 33 is vertically rotatably mounted on the upper part of the base 11. The upper end of the output shaft of the reducer 33 is connected to the lower end of the main shaft 31 through a hollow coupling. The upper end of the main shaft 31 extends through the lower crossbeam 123 and into the upper part of the lower crossbeam 123. The main shaft 31 and the piston rod of the force loading cylinder 21 are arranged on the same axis. The upper end of the main shaft 31 is provided with a connecting seat for connecting the mold structure 4.

[0019] Please continue to refer to the appendix. Figure 2 and attached Figure 3 The lower crossbeam 123 is provided with a rotation limiting hole 1231 that cooperates with the main shaft 31. The lower end of the rotation limiting hole 1231 is equipped with a first bearing 311, and the upper end of the rotation limiting hole 1231 is connected to a thrust self-aligning roller bearing 312, thereby achieving radial limiting of the main shaft 31 and bearing axial load. The torque sensor 313 is set between the first bearing 311 and the thrust self-aligning roller bearing 312 and is coaxially installed with the main shaft 31, thereby realizing real-time detection of the torsional load output by the main shaft 31.

[0020] Please continue to refer to the appendix. Figure 2 and attached Figure 3 The mold structure 4 includes an upper mold 41 and a lower mold 42. The upper mold 41 is fixed to the lower end of the piston rod of the force loading cylinder 21 via an upper mold base 43, and the lower mold 42 is fixed to the upper end of the main shaft 31 via a lower mold base 44. The upper mold 41 and the lower mold 42 are configured as commonly used concave-convex abrasives, arranged along the same axis. The upper mold 41 is driven by the force loading cylinder 21 to press down axially, and the lower mold 42 is twisted with the main shaft 31, so that the clamped sample is simultaneously subjected to axial pressure and torsional load, realizing a combined pressure and torsional loading condition.

[0021] Please refer to the attached document. Figure 1 and attached Figure 4The control structure 5 is located on one side of the base 11 and is connected to the force loading cylinder 21 and the servo motor 32. The control structure 5 is used to achieve coordinated control of the servo pump of the force loading cylinder 21 and the servo motor 32 in the torque output structure 3, thereby realizing synchronous adjustment and real-time monitoring of loading force, torque, displacement and angle.

[0022] Specifically, the control structure 5 includes an electrical control module, a control panel, and a touch screen, all fixedly mounted in the control cabinet. The electrical control module includes a power supply unit and a main control module connected by a circuit. The power supply unit can be, but is not limited to, an industrial switching power supply. The main control module can be, but is not limited to, a microcontroller of the STM32F4 series or a PLC controller of the S7-1200 series. The control output terminal of the main control module is connected to the input terminal of a servo driver via a circuit. The output terminal of the servo driver is connected to the force-loading cylinder 21 in the loading structure 2 and the torque output structure 3, respectively. The servo motor 32 and the display terminal of the touch screen are connected by a circuit. The control panel and the touch terminal of the touch screen are also connected by a circuit to the control input terminal of the main control module. At the same time, the signal output terminal of the torque sensor 313 is connected to the signal input terminal of the main control module through a data line. This enables the input of control commands for loading force, torque, speed and test duration through the control panel or touch screen, and the real-time reception of pressure feedback signals from the torque sensor 313 and the force loading cylinder 21, thereby completing the automated operation control of the pressure-torsion composite test process and the real-time display and recording of test data.

[0023] Please refer to the attached document. Figure 1 and attached Figure 5The circumferential anti-rotation structure 6 is disposed on the force loading cylinder 21. The circumferential anti-rotation structure 6 is configured to cooperate with the piston rod of the force loading cylinder 21 to prevent the piston rod from rotating circumferentially during loading, ensuring the consistency of the loading direction and the stable transmission of the loading force. Specifically, the circumferential anti-rotation structure 6 includes a limiting straight rod 61. The upper crossbeam 122 is provided with a guide hole 1221 adapted to the outer periphery of the piston rod of the force loading cylinder 21. The limiting straight rod 61 is vertically disposed on the inner wall of the guide hole 1221. The outer periphery of the piston rod of the force loading cylinder 21 is provided with an anti-rotation guide groove 211 adapted to the limiting straight rod 61. The cross-sectional shape of each anti-rotation guide groove 211 can be rectangular, semi-circular or dovetail-shaped, and its depth matches that of the limiting straight rod 61, so that the two form a sliding guide pair in the vertical direction. When the force-loading cylinder 21 is working, the piston rod reciprocates linearly in the axial direction. The limiting straight rod 61 slides along its length in the anti-rotation guide straight groove 211, thereby effectively limiting the rotational movement of the piston rod around its own axis. A self-lubricating bushing or guide sleeve can be provided in the guide hole 1221 at the upper crossbeam 122. The inner wall of the guide sleeve has a sliding groove that matches the limiting straight rod 61, which can provide precise guidance and absorb part of the lateral impact load, so that the piston rod can still maintain good guiding accuracy and smooth movement under high load conditions.

[0024] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A metal compression-torsion testing device, characterized in that, include: The support structure (1) includes a base (11) and an anti-torsion support frame (12) fixedly installed on the upper part of the base (11). The anti-torsion support frame (12) includes a stand (121) and an upper crossbeam (122) and a lower crossbeam (123) respectively installed at the upper and lower ends of the stand (121). The loading structure (2) includes a force loading cylinder (21), which is fixedly mounted on the upper part of the upper crossbeam (122). The lower end of the piston rod of the force loading cylinder (21) extends through the upper crossbeam (122) to the lower part of the upper crossbeam (122). The torque output structure (3) includes a main shaft (31), a servo motor (32), and a reducer (33) connected to the output shaft of the servo motor (32). The output shaft of the reducer (33) is vertically rotatably mounted on the upper part of the base (11). The upper end of the output shaft of the reducer (33) is connected to the main shaft (31) through a hollow coupling. The main shaft (31) extends through the lower crossbeam (123) to the upper part of the lower crossbeam (123). The main shaft (31) and the piston rod of the force loading cylinder (21) are arranged on the same axis. A torque sensor (313) is provided on the main shaft (31). The mold structure (4) includes an upper mold (41) and a lower mold (42). The upper mold (41) is fixed to the lower end of the piston rod of the force loading cylinder (21), and the lower mold (42) is fixed to the upper end of the main shaft (31).

2. The metal compression-torsion testing device according to claim 1, characterized in that, The lower crossbeam (123) is provided with a rotation limiting hole (1231) that cooperates with the main shaft (31). The lower end of the rotation limiting hole (1231) is provided with a first bearing (311), and the upper end of the rotation limiting hole (1231) is provided with a thrust self-aligning roller bearing (312).

3. The metal compression-torsion testing device according to claim 2, characterized in that, The torque sensor (313) is disposed between the thrust self-aligning roller bearing (312) and the first bearing (311).

4. The metal compression-torsion testing apparatus according to claim 1 or 3, characterized in that, It also includes a control structure (5), which is connected to the force-loading cylinder (21) and the servo motor (32).

5. The metal compression-torsion testing device according to claim 1, characterized in that, The force loading cylinder (21) is provided with a circumferential anti-rotation structure (6) that cooperates with the piston rod of the force loading cylinder (21).

6. The metal compression-torsion testing device according to claim 5, characterized in that, The circumferential anti-rotation structure (6) includes a limiting straight rod (61), the upper crossbeam (122) is provided with a guide hole (1221) adapted to the outer periphery of the piston rod of the force loading cylinder (21), the limiting straight rod (61) is vertically arranged on the inner wall of the guide hole (1221), and the outer periphery of the piston rod of the force loading cylinder (21) is provided with an anti-rotation guide groove (211) adapted to the limiting straight rod (61).

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