• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A system and method for testing uniaXial tensile high-temperature mechanical properties of a plate measure basic mechanical properties of the plate in 5 high-temperature uniaXial tensile test. The system comprises a tensile test device and heating devices symmetrically arranged on the test device; the test device comprises a workbench, two clamps arranged thereon and a tensile test piece clamped between the two, the heating device comprises PLC control system, induction heating power supply, induction coil, iron plate and support frame arranged on the workbench, the 10 plate is fixed on the support frame, one side of the plate parallel to the test piece, the other parallel to the induction coil, the power supply is connected to the induction coil, the PLC control system is connected to the power supply and controls the output power of the power supply for automatic adjustment and control of the temperature of the test piece. 15
    公开号:NL2026681A
    申请号:NL2026681
    申请日:2020-10-15
    公开日:2021-06-07
    发明作者:Chu Xingrong
    申请人:Univ Shandong；
    IPC主号:
    专利说明:

    SYSTEM AND METHOD FOR TESTING UNIAXIAL TENSILE HIGH-TEMPERATURE MECHANICAL PROPERTIES OF PLATE Field of the Invention The present disclosure relates to the field of characterization of mechanical properties of metal plates, in particular to a system and method for testing uniaxial tensile mechanical properties of a metal plate under high-temperature conditions. Background of the Invention JO Accurate high-temperature mechanical properties of metal plates have important guiding significance for high-temperature forming of plates. At present, the thermal tensile mechanical properties of metal plates are mainly tested by using a furnace heating method at home and abroad, and detailed data of uniaxial tensile tests of the plates can be obtained by means of high-temperature extensometers. In recent years, a non-contact strain measurement method (DIC technology) has been widely used in the mechanical property test of metal plates. The DIC technology can not only obtain the accurate strain of a metal plate, but also can record the strain development history during the deformation of the plate, for example, accurately measure the anisotropy, elastic modulus, uniaxial tensile fracture limit, etc. of the plate, and can provide an accurate data basis for the characterization of high-temperature mechanical properties of the plate. During the research and development process, the inventors found that when the furnace heating method is used for tensioning, the DIC technology cannot be applied well due to the closed furnace body, the high-temperature air in the furnace and the light refraction of glass, which affect the test accuracy; and the strain of a heated test piece can be tested only by a high-temperature extensometer, so that the strain field of the test piece cannot be accurately obtained, and the accurate high-temperature mechanical properties of the plate cannot be obtained accordingly.
    Summary of the Invention
    In order to overcome the shortcoming that the existing thermal environment uniaxial tensile test system cannot accurately obtain the strain field of a test piece, the present disclosure provides a system and method for testing uniaxial tensile high-temperature mechanical properties of a plate, which measure basic mechanical properties of the plate in the high-temperature uniaxial tensile test, and obtain an accurate stress-strain curve, and basic mechanical property data such as elastic modulus, yield strength, tensile strength and anisotropic r-values of a material at different temperatures.
    One aspect of the present disclosure provides a technical solution of a system for testing uniaxial tensile high-temperature mechanical properties of a plate: A system for testing uniaxial tensile high-temperature mechanical properties of a plate includes a tensile test device and two heating devices symmetrically arranged on the tensile test device, and the tensile test device includes a workbench, two clamps arranged on the workbench and a tensile test piece clamped between the two clamps; the heating device includes a PLC control system, an induction heating power supply, an induction coil, an iron plate and an iron plate support frame; the iron plate support frame is arranged on the workbench, the iron plate is fixedly arranged on the iron plate support frame, one side of the iron plate is parallel to the test piece, the other side 1s parallel to the induction coil, the induction heating power supply is connected to the induction coil, and the PLC control system is connected to the induction heating power supply and configured to control the output power of the induction heating power supply to realize automatic adjustment and control on the temperature of the tensile test piece.
    Further, the iron plate 1s fixed on a support column by two support rods. Further, the support column is further provided with an induction coil mounting piece, the induction coil mounting piece includes a mounting plate, and both ends of the mounting plate are fixedly mounted on the support column through L-shaped supports, respectively.
    Further, two outgoing lines of the induction coil pass through the mounting plate and are connected to the induction heating power supply.
    Further, a thermocouple wire is welded to a middle surface of the tensile test piece.
    Further, the PLC control system includes a PLC, a CPU module, a thermocouple module and a power module, an input end of the thermocouple module is connected to the thermocouple wire, an output end of the thermocouple module is connected to the CPU module, an output end of the CPU module is connected to the PLC, and an output end of the PLC is connected to the induction heating power supply to control the output power of the induction heating power supply. Another aspect of the present disclosure provides a technical solution of a method for testing uniaxial tensile high-temperature mechanical properties of a plate: A method for testing uniaxial tensile high-temperature mechanical properties of a plate is implemented based on the system for testing uniaxial tensile high-temperature mechanical properties of a plate as described above, and includes the following steps: the induction heating power supply outputs current to the induction coil, and the iron plate is heated by the induction coil and transfers the heat to the tensile test piece by means of heat conduction to heat the tensile test piece; the thermocouple wire collects the temperature of the tensile test piece and transmits the temperature to the thermocouple module; the thermocouple module obtains the temperature of the test piece collected by the thermocouple wire and transmits the temperature to the CPU module, and the CPU module processes the temperature data of the test piece collected by the thermocouple wire and transmits the temperature data to the PLC; and the PLC processes the data by means of a PID control method to obtain a control signal, and outputs the control signal to the induction heating power supply, to control the output value of the induction heating power supply, thereby realizing automatic adjustment and control on the heating temperature of the tensile test piece.
    Through the above technical solutions, the beneficial effects of the present disclosure are: (1) The test piece is heated based on the reliable induction heating coils with fast heating speed and good temperature uniformity, the tensile test piece is heated quickly and uniformly by means of heat conduction, the elongation of the material is not affected, and accurate high-temperature uniaxial tensile mechanical property test of the plate can be realized, (2) The present disclosure overcomes the shortcoming that the existing thermal environment uniaxial tensile test system cannot accurately obtain the strain field of the test piece, and realizes accurate measurement of basic mechanical properties of the plate in the high-temperature uniaxial tensile test.
    Brief Description of the Drawings The accompanying drawings constituting a part of the present disclosure are intended to provide a further understanding of the present disclosure, and the illustrative IO embodiments of the present disclosure and the descriptions thereof are intended to interpret the present disclosure and do not constitute improper limitations to the present disclosure.
    FIG. 1 is a structural diagram of a system for testing uniaxial tensile high-temperature mechanical properties of a plate according to Embodiment 1; FIG. 2 is a side view of an iron plate support frame according to Embodiment 1 Detailed Description of Embodiments The present disclosure will be further illustrated below in conjunction with the accompanying drawings and embodiments.
    It should be noted that the following detailed descriptions are exemplary and are intended to provide further descriptions of the present disclosure. All technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical filed to which the present disclosure belongs, unless otherwise indicated.
    It should be noted that the terms used here are merely used for describing specific embodiments, but are not intended to limit the exemplary embodiments of the present application. As used herein, the singular form is also intended to comprise the plural form unless otherwise indicated in the context. In addition, it should be understood that when the terms “contain” and/or “comprise” are used in the description, they are intended to indicate the presence of features, steps, operations, devices, components and/or combinations thereof.
    Embodiment 1 This embodiment provides a system for testing uniaxial tensile high-temperature mechanical properties of a plate, including a tensile test device and two heating 5 devices symmetrically arranged on the tensile test device.
    Referring to FIG. 1, the tensile test device includes a workbench, two clamps 10 arranged on the workbench, and a tensile test piece 1 clamped between the two clamps.
    The two heating devices are symmetrically arranged on the workbench and located on both sides of the tensile test piece. Specifically, the heating device includes a PLC control system, an induction heating power supply, an induction coil 3, an iron plate 2 and an iron plate support frame.
    The iron plate support frame is arranged on the workbench of the tensile test device.
    Referring to FIG. 1, the iron plate support frame includes a base 4 and a support column 5 arranged on the base, the iron plate 2 is fixed on the support column 5 by two support rods 6, spaced from the tensile test piece 1 by a certain gap and parallel to the tensile test piece 1, and the size of the iron plate can completely cover a gauge length area of the tensile test piece; the support column 5 is further provided with an induction coil mounting piece, and two outgoing lines 7 of the induction coil 3 pass through the induction coil mounting piece and are connected to the induction heating power supply; the induction coil 3 is parallel to the iron plate 2 and spaced at a certain distance, and the iron plate 2 is heated by the induction coil 3 and transfers heat to the tensile test piece 1 by heat conduction to heat the tensile test piece 1.
    In this embodiment, the induction coil mounting piece includes a mounting plate 8 and two L-shaped supports 9, and both ends of the mounting plate 8 are fixedly mounted on the support column 5 through the two L-shaped supports 9.
    A thermocouple wire is welded to a middle surface of the tensile test piece, the thermocouple wire is connected to a thermocouple module of the PLC control system to monitor the temperature of the tensile test piece in real time, the PLC control system is connected to the induction heating power supply, and the measured temperature of the tensile test piece is used as a feedback signal in the PLC control system to control the power of the induction heating power supply, thereby realizing a real-time temperature control function for the tensile test piece.
    In this embodiment, the PLC control system includes a PLC (Programmable Logic Controller), a CPU (Central Processing Unit) module, a thermocouple module and a power module, an input end of the thermocouple module is connected to the thermocouple wire, an output end of the thermocouple module is connected to the CPU module, an output end of the CPU module is connected to the PLC, and an output end of the PLC is connected to the induction heating power supply to realize closed-loop control.
    When the PLC proposed in this embodiment performs closed-loop control, the thermocouple module obtains the temperature of the test piece collected by the thermocouple wire and transmits the temperature to the CPU module, the CPU module processes the temperature data of the test piece collected by the thermocouple wire and transmits the temperature data to the PLC, and a control signal is output from a PLC output port to the induction heating power supply by means of a PID function in the PLC to control the output value of the induction heating power supply, thereby realizing real-time and automatic adjustment and control on the temperature of the test piece.
    In this embodiment, the thermocouple wire is welded to the middle surface of the test piece, and the output power of the induction heating power supply is adjusted in real time according to the temperature of the test piece monitored in real time by the thermocouple wire and the thermocouple module, thereby controlling the temperature of the test piece.
    According to the system for testing uniaxial tensile high-temperature mechanical properties of a plate in this embodiment, the test piece is heated based on the reliable induction heating coils with fast heating speed and good temperature uniformity, the tensile test piece is heated quickly and uniformly by means of heat conduction, the elongation of the material is not affected, and accurate high-temperature uniaxial tensile mechanical property test of the plate can be realized.
    Embodiment 2 This embodiment provides a method for testing uniaxial tensile high-temperature mechanical properties of a plate. This method is implemented based on the system for testing uniaxial tensile high-temperature mechanical properties of a plate as described in Embodiment 1. The method includes the following steps: S101, the induction heating power supply outputs current to the induction coil, and the iron plate is heated by the induction coil and transfers the heat to the tensile test piece to realize rapid and uniform heating of the tensile test piece.
    $102, the thermocouple wire collects the temperature of the tensile test piece and transmits the temperature to the thermocouple module.
    S103, the thermocouple module obtains the temperature of the test piece collected by the thermocouple wire and transmits the temperature to the CPU module, and the CPU module processes the temperature data of the test piece collected by the thermocouple wire and transmits the temperature data to the PLC.
    S104, the PLC processes the data by means of a PID control method to obtain a control signal, and outputs the control signal to the induction heating power supply, to control the output value of the induction heating power supply, thereby realizing automatic adjustment and control on the heating temperature of the tensile test piece. The method for testing uniaxial tensile high-temperature mechanical properties of a plate proposed in this embodiment overcomes the shortcoming that the existing thermal environment uniaxial tensile test system cannot accurately obtain the strain field of the test piece, and realizes accurate measurement of basic mechanical properties of the plate in the high-temperature uniaxial tensile test.
    Although the specific embodiments of the present disclosure are described above in combination with the accompanying drawings, the protection scope of the present disclosure is not limited thereto. It should be understood by those skilled in the art that various modifications or variations could be made by those skilled in the art based on the technical solution of the present disclosure without any creative effort, and these modifications or variations shall fall into the protection scope of the present disclosure.
    权利要求:
    Claims (7)
    [1]
    A system for testing mechanical properties at uniaxial high temperature tensile loading for a plate, comprising a tensile tester and two heating devices arranged symmetrically on the tensile tester, the tensile tester having a workbench and two clamps arranged on the workbench and a tensile test piece between two includes clamps clamped; the heating apparatus comprises a programmable logic control control system, an inductive heating power supply, an induction coil, an iron plate and a support frame for the iron plate; the iron plate support frame is set up on the workbench, the iron plate is fixed on the iron plate support frame, one side of the iron plate is parallel to the test piece, the other side is parallel to the induction coil, the inductive heating energy supply is connected to the induction coil, and the programmable logic control control system is connected to the inductive heating energy supply and configured to control the output energy of the inductive heating energy supply so as to realize the automatic setting and regulation of the temperature of the tensile test piece.
    [2]
    The system for testing mechanical properties at high temperature uniaxial tensile loading for a plate according to claim 1, wherein the iron plate is fixed on a support column by means of two support rods.
    [3]
    The system for testing mechanical properties at high temperature uniaxial tensile load for a plate according to claim 1, wherein the support column further comprises an induction coil mounting, the induction coil mounting comprises a mounting plate, and both ends of the mounting plate are respectively fixedly mounted on the support column via L-shaped supports.
    [4]
    The system for testing mechanical properties at high temperature uniaxial tensile loading for a plate according to claim 3, wherein two outgoing electric lines from the induction coil pass through the mounting plate and are connected to the inductive heating energy supply.
    [5]
    The system for testing mechanical properties at high temperature uniaxial tensile loading for a plate according to claim 1, wherein a thermocouple wire is welded to a center surface of the tensile test piece.
    [6]
    The system for testing mechanical properties at high temperature uniaxial tensile loading for a plate according to claim 5, wherein the programmable logic control control system comprises a programmable logic controller, a central processing unit module, a thermocouple module and a power module, an input end of the thermocouple module is connected to the thermocouple wire, an output end of the thermocouple module is connected to the central processing unit module, and an output end of the central processing unit module is connected to the programmable logic controller, an output end of the programmable logic controller is connected to the inductive heating energy supply at in order to control the output energy of the inductive heating energy supply.
    [7]
    A method for testing high temperature uniaxial tensile load mechanical properties for a sheet, implemented on the basis of the system for testing high temperature uniaxial tensile load mechanical properties for a sheet according to any one of claims 1 to 6, comprising the following steps, wherein: the inductive heating energy supply sends current to the induction coil, and the iron sheet is heated by the induction coil and transfers the heat to the tensile test piece by means of heat conduction to uniformly heat the tensile test piece; the thermocouple wire takes the temperature of the tensile test piece and sends the temperature to the thermocouple module;
    the thermocouple module obtains the temperature picked up by the thermocouple wire and sends the temperature to the central processing unit module, and the central processing unit module processes the temperature data collected by the thermocouple wire from the tensile test piece and sends the temperature data to the programmable logic controller;
    and the programmable logic control the data by means of a
    PID control method processes to obtain a control signal, and outputs the control signal to the inductive heating power supply to control the output value of the heating power supply, thereby realizing the automatic adjustment and control of the heating temperature of the tensile test piece.
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    引用文献:
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    法律状态:
    优先权:
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