Multistage energy storage electromagnetic forming device

Abstract

The utility model relates to a multistage energy storage electromagnetic forming device. Belongs to the technical field of electromagnetic forming. The electromagnetic forming device mainly solves the problem that due to the fact that an equivalent capacitor is adopted in an energy storage module of a traditional electromagnetic forming device, a control mode is extensive for researching technological parameters in the electromagnetic forming process. The device is mainly characterized by comprising a charging unit, an energy storage module and a measurement and control system, the charging unit is a multi-path output charging unit and is composed of a direct current power supply circuit and a plurality of selection branches, wherein each selection branch is composed of a silicon stack and a contactor which are connected in series. The energy storage module is a multi-stage energy storage module and is composed of selection energy storage modules correspondingly matched with a plurality of selection branches, and the capacitance values of energy storage capacitors in each stage of selection energy storage module are arranged according to a geometric progression or partially arranged according to the geometric progression. The electromagnetic forming device has the characteristic of being capable of accurately controlling the electromagnetic forming process, and is mainly used for research and application of the electromagnetic forming technology.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of electromagnetic forming, and particularly relates to a multistage energy storage electromagnetic forming device, which has practical significance in the research and application of electromagnetic forming technology. BACKGROUND

[0002] The electromagnetic forming process is to use the metal material to generate the current (eddy current) in the alternating electromagnetic field, and the induced current is subjected to the force of the electromagnetic field, and under the action of the electromagnetic force, the blank generates high-speed movement and plastic deformation with the single-face concave die. In actual production, a strong electromagnetic field is generated by the instantaneous discharge of a high-voltage capacitor, and the blank can obtain a large magnetic field force and a high speed. Electromagnetic forming involves the contents of electricity, electromagnetism, electrodynamic and plastic dynamics. Due to the complexity of electricity, electromagnetism and electrodynamic and the imperfection of plastic dynamics itself, especially due to the interaction of the electrical process and the mechanical process in the electromagnetic forming process, the theoretical research of electromagnetic forming is complex and difficult.

[0003] The traditional electromagnetic forming device uses equivalent capacitance for the energy storage module capacitor. The discharge energy is changed by changing the voltage. When the voltage is changed, the energy is changed according to the square of the voltage, and the voltage change di / dt is also changed. This control method is obviously rough for the research of the process parameters in the electromagnetic forming process. UTILITY MODEL CONTENT

[0004] The utility model provides a multistage energy storage electromagnetic forming device for the above-mentioned defects, which can control the electromagnetic forming process parameters more finely.

[0005] The technical solution of the utility model is: a multistage energy storage electromagnetic forming device, comprising a charging unit, an energy storage module and a measurement and control system, characterized by: the charging unit is a multi-output charging unit, which is composed of a direct current power supply circuit and a plurality of selection branches composed of a silicon stack and a contactor in series; the energy storage module is a multistage energy storage module, which is composed of a selection energy storage module corresponding to the plurality of selection branches, and the energy storage capacitance values in each selection energy storage module are arranged in an equal ratio series or part of an equal ratio series.

[0006] The plurality of selection branches in the technical solution of the utility model are greater than or equal to 3 selection branches.

[0007] The energy storage capacitance values in each selection energy storage module in the technical solution of the utility model are arranged in 1:2:4:…….

[0008] The energy storage module selected in the technical solution of this utility model is an n-level energy storage module; wherein, the energy storage capacitor values ​​in the n-2 level energy storage modules are the same, and the energy storage capacitor values ​​in the remaining level energy storage modules are arranged in a ratio of 1:2:2:... or 1:1:2:...

[0009] The energy storage module selected in the technical solution of this utility model includes a voltage measurement circuit, a discharge circuit, an energy storage capacitor, a discharge switch, a freewheeling circuit, and a current measurement coil.

[0010] In the technical solution of this utility model, the voltage measurement circuit, the energy discharge circuit, the energy storage capacitor, and the freewheeling circuit are connected in parallel and then connected in series with the anode of the discharge switch.

[0011] In the technical solution of this utility model, the cathode lead of the discharge switch passes through the current measuring coil.

[0012] The discharge switch described in the technical solution of this utility model is a high-voltage switch.

[0013] The discharge switch described in the technical solution of this utility model is a semiconductor switch of a thyristor valve group, a vacuum trigger switch, or a gas spark switch.

[0014] The measurement and control system described in the technical solution of this utility model consists of a main control board, a charger control board, a module control board, and a human-machine interface.

[0015] The main control board in the technical solution of this utility model is used to control the actions of each part according to the parameter settings, human-machine interface control, and real-time signals collected by each part.

[0016] The charger control board described in the technical solution of this utility model is used to collect current and voltage signals in the charger and control the actions of various parts of the charger according to the signals from the main control board.

[0017] In the technical solution of this utility model, the module control board is used to control the operation of the energy leakage switch and the discharge switch according to the signal of the main control board, and to collect the current and voltage signals and the status signals of the energy leakage switch and the discharge switch in the energy storage module, and then send them to the main control board.

[0018] The human-machine interface described in the technical solution of this utility model is used to set charging parameters, display the status information of the electromagnetic forming device, real-time voltage and current waveform data, and control the switching actions of various parts.

[0019] The utility model discloses a multistage energy storage electromagnetic forming device which is composed of a plurality of output charging units, multistage energy storage modules and a measurement and control system.

[0020] The utility model has the characteristics of realizing the accurate control of electromagnetic forming process parameters, and is mainly used for the research and application of electromagnetic forming technology. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The utility model discloses a circuit diagram.

[0022] Figure 2 The utility model discloses a measurement and control system principle block diagram.

[0023] In the drawing: 1 - a plurality of output charging units; 2 - multistage energy storage modules; 3 - measurement and control system. DETAILED DESCRIPTION

[0024] The utility model will be described completely in the following with the drawings in the embodiment of the utility model.

[0025] As Figure 1 The utility model discloses a multistage energy storage electromagnetic forming device, which comprises a plurality of output charging units, multistage energy storage modules and a measurement and control system.

[0026] The plurality of output charging units 1 is composed of a direct current power supply circuit and four selection branches. The input end of the direct current power supply circuit is connected with a three-phase power supply A / B / C / N through a switch QF, and the output end is connected with the input end of the four selection branches. Each selection branch is composed of a selection branch composed of a silicon stack and a high-voltage contactor in series. The silicon stack includes a first silicon stack D01, a second silicon stack D02, a third silicon stack D03 and a fourth silicon stack D04. The contactor includes a first contactor KM01, a second contactor KM02, a third contactor KM03 and a fourth contactor KM04.

[0027] The multi-stage energy storage module 2 is composed of four-stage selection energy storage modules, which are matched with four selection branches. Each selection energy storage module includes a voltage measurement circuit, a energy release circuit, an energy storage capacitor, a discharge switch, a freewheeling circuit and a current measurement coil. The voltage measurement circuit, the energy release circuit, the energy storage capacitor and the freewheeling circuit are connected in parallel, and are connected in series with the anode of the discharge switch. The cathode of the discharge switch is connected through the current measurement coil. The voltage measurement circuit includes a first voltage measurement circuit PT11, a second voltage measurement circuit PT21, a third voltage measurement circuit PT31 and a fourth voltage measurement circuit PT41. The first contactor KM11 and the first resistor R11 are connected in series to form the first energy release circuit. The second contactor KM21 and the second resistor R21 are connected in series to form the second energy release circuit. The third contactor KM31 and the third resistor R31 are connected in series to form the third energy release circuit. The fourth contactor KM41 and the fourth resistor R41 are connected in series to form the fourth energy release circuit. The energy storage capacitor includes a first energy storage capacitor C11, a second energy storage capacitor C21, a third energy storage capacitor C31 and a fourth energy storage capacitor C41. The capacitance values of the first to fourth energy storage capacitors C11, C21, C31 and C41 are 50 uF, 100 uF, 200 uF and 400 uF respectively, and the capacitance values are arranged in the ratio of 1:2:4:8. The discharge switch includes a first discharge switch S11, a second discharge switch S21, a third discharge switch S31 and a fourth discharge switch S41. The discharge switch is a semiconductor switch of a thyristor valve group, and can also be a high-voltage switch such as a vacuum trigger switch or a gas spark switch. The first to fourth diodes D1, D2, D3 and D4 form the first to fourth freewheeling protection circuits respectively. The first to fourth current measurement coils CT11, CT21, CT31 and CT41 form the current measurement circuit. The input end of the multi-stage energy storage module 2 is connected with the output end of the four selection branches, and the output end is connected with the load.

[0028] The number n of the multi-stage energy storage module is 4, which is greater than 3. Two groups of energy storage modules have the same capacitance value of the energy storage capacitors, i.e., two of the first to fourth energy storage capacitors C11, C21, C31 and C41 have the same capacitance value.

[0029] The measurement and control system 3 is composed of a main control board, a charger control board, module control boards and a man-machine interface. The charger control board is connected with the first contactor KM01, the second contactor KM02, the third contactor KM03 and the fourth contactor KM04 in the four selection branches. The module control boards 1, 2, 3 and 4 are connected with the first discharge switch S11, the second discharge switch S21, the third discharge switch S31 and the fourth discharge switch S41 in the four-stage selection energy storage modules respectively, so that the four selection branches and the four-stage selection energy storage modules can be freely combined. The main control board is connected with the charger control board, the module control boards and the man-machine interface to realize signal transmission and control.

[0030] The utility model discloses a storage energy unit in the multiway pulse power conversion module is arranged according to the mode of geometric progression, realized the accurate control of storage energy capacity, thereby can adjust the pulse power from two dimensions of storage energy capacity and charging voltage, realizes the accurate control to electromagnetic forming process.

[0031] The above is only the preferred embodiment of the utility model, and does not limit the utility model in any form. Therefore, any modification, equivalent replacement, equivalent change and modification made to the above embodiment according to the technical essence of the utility model without departing from the content of the utility model still belong to the protection range of the technical scheme of the utility model.

Claims

1. A multistage energy storage electromagnetic forming device comprising a charging unit, an energy storage module and a measuring and control system (3), characterized by: The charging unit is a multi-output charging unit (1) composed of a direct current power supply circuit and multiple selection branches composed of a silicon stack and a contactor in series; the energy storage module is a multi-stage energy storage module (2) composed of selection energy storage modules corresponding to the multiple selection branches, and the energy storage capacitor values in each stage of the selection energy storage modules are arranged in an equal ratio series or partially in an equal ratio series.

2. A multistage stored-energy electromagnetic forming device according to claim 1, characterized in that: The multiple selection branches are greater than or equal to three selection branches.

3. A multistage stored-energy electromagnetic forming device according to claim 2, characterized in that: The energy storage capacitor values in each stage of the selection energy storage modules are arranged in 1:2:4:….

4. A multistage stored-energy electromagnetic forming device according to claim 2, characterized in that: The selection energy storage module is an n-stage selection energy storage module; wherein the energy storage capacitor values in the n-2 stage selection energy storage module are the same, and the energy storage capacitor values in the remaining stage selection energy storage modules are arranged in 1:2:2:… or 1:1:2:….

5. A multistage energy accumulating electromagnetic forming device according to any of claims 1-4, characterized in that: The selection energy storage module contains a voltage measurement circuit, an energy release circuit, an energy storage capacitor, a discharge switch, a freewheeling circuit, and a current measurement coil.

6. A multistage stored-energy electromagnetic forming device according to claim 5, characterized in that: The voltage measurement circuit, the energy release circuit, the energy storage capacitor, and the freewheeling circuit are connected in parallel, and then connected in series with the anode of the discharge switch.

7. A multistage stored-energy electromagnetic forming device according to claim 6, characterized in that: The discharge switch is a high-voltage switch.

8. A multistage stored-energy electromagnetic forming device according to claim 7, characterized in that: The discharge switch is a semiconductor switch of a thyristor valve group, a vacuum trigger switch, or a gas spark switch.

9. A multistage energy accumulating electromagnetic forming device according to any of claims 1-4, 6-8, characterized in that: The measurement and control system (3) is composed of a main control board, a charging machine control board, a module control board, and a human-machine interface.

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