Electric spark machine tool control system based on SOPC

Abstract

The utility model belongs to the field of electric spark machine tool control equipment, and particularly relates to an SOPC-based electric spark machine tool control system, which comprises an upper computer, a pulse power supply module, a discharge gap detection module, a servo control module, a motion axis module and an IO module, the discharge gap detection module comprises a discharge gap sampling circuit and a signal processor, the servo control module comprises a servo controller and a servo driver and further comprises an SOPC chip connected with an upper computer, the main vibration level is replaced by a programmable logic unit in the SOPC, the signal processor is replaced by a programmable logic unit in the SOPC, and the servo controller is connected with the upper computer. The servo controller is replaced by a hard core processor in the SOPC, and the motion axis module and the IO module are both connected with the hard core processor in the SOPC. The system can guarantee the real-time performance of the discharge gap control system to the maximum extent, and can effectively improve the machining precision and reliability of an electric spark machining machine tool.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the control equipment field of electric spark processing machine tool, specifically point to a kind of control system of electric spark processing machine tool based on SOPC (System On Programmable Chip, programmable system on chip). BACKGROUND

[0002] The electric control system of the existing electric spark processing machine tool, referring to Figures 1 to 3 Generally consists of transistor pulse power supply, discharge gap detection module, servo feed control module, motion shaft control module and input-output module etc. Transistor pulse power supply consists of main oscillator stage, amplification stage, power stage etc. The main oscillator stage is essentially a pulse generator, which emits a rectangular pulse signal with a certain pulse width and pulse interval time, then amplified by the amplification stage, and finally drives the final power transistor to turn on or off. The discharge gap detection module needs to perform intelligent detection algorithm processing on the collected gap voltage or current signal, which consists of analog sampling circuit and signal processor. The traditional control system runs on two or more hardware platforms provided by different suppliers, and the two are connected through an interface. The overall function of the system is completed, and at least 2 or 3 control chips are needed to realize each function module in the system, which greatly increases the complexity of the system, and the interaction between each function module is poor, not easy to maintain. This kind of dispersed module structure cannot meet the requirements of high speed, high precision and high reliability of machine tool system in actual production. UTILITY MODEL CONTENT

[0003] The utility model aims at providing a kind of electric spark processing machine tool control system based on SOPC with simple structure, high efficiency, strong reliability and good maintainability.

[0004] The technical scheme for achieving the above-mentioned purpose includes the following contents.

[0005] A kind of electric spark processing machine tool control system based on SOPC, including host computer, pulse power module, discharge gap detection module, servo control module, motion shaft module and IO module, the pulse power module includes main oscillator stage, amplification stage, power stage, discharge gap detection module includes discharge gap sampling circuit and signal processor, servo control module includes servo controller and servo driver, further include the SOPC chip connected with host computer, the main oscillator stage is replaced by programmable logic unit in SOPC, the signal processor is replaced by programmable logic unit in SOPC, the servo controller is replaced by hard-core processor in SOPC, the motion shaft module and IO module are all connected with hard-core processor in SOPC.

[0006] Further, the SOPC chip is a Zynq-7000 series or a Cyclone V series.

[0007] The utility model discloses a spark erosion machine tool control system based on SOPC cancels the main vibration level in the original pulse power, replaces the programmable logic (PL) unit in the SOPC, provides the pulse signal for pulse power, cancels the signal processor in the original discharge gap detection module, and the PL unit is used as the signal processor of discharge gap detection module, and the analog signal of discharge gap sampling part input is handled, and the hard core processor in the SOPC replaces the servo controller in the servo control module, to realize the machining gap adaptive control algorithm. Compared with the prior art serial ports, USB and CAN and other communication modes carry out the data interaction mode, the utility model discloses with SOPC as the platform of detection and servo control, and after the detection module in the PL completes the discharge gap state detection, can directly transmit the signal processing result to the PS part through the high -speed AXI bus in the chip and realize the servo control strategy, and the two are integrated into an independent system, can realize faster and safer data transmission between different system units, have higher overall system speed, lower power consumption, smaller physical size and better reliability, and the real -time performance of discharge gap control system can be effectively improved, and the machining precision and reliability of spark erosion machine tool can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 It is a transistor type pulse power structure diagram.

[0009] Figure 2 It is a traditional average gap voltage detection circuit principle diagram.

[0010] Figure 3 It is the structure principle diagram of the prior art spark erosion machine tool control system.

[0011] Figure 4 It is the structure principle diagram of the spark erosion machine tool control system based on SOPC of embodiment.

[0012] Figure 5 It is the interface circuit principle diagram between SOPC and each module in the embodiment.

[0013] Figure 6 It is the pulse power circuit principle diagram connected with the SOPC in the embodiment.

[0014] Figure 7 It is the discharge gap detection circuit principle diagram connected with the SOPC in the embodiment.

[0015] Figure 8 It is the servo control circuit principle diagram connected with the SOPC in the embodiment. DETAILED DESCRIPTION

[0016] The utility model will be specifically explained below in combination with the embodiments.

[0017] The SOPC chip of the embodiment adopts the Zynq-7000 series hardware platform of Xilinx Company, and the electrical discharge machining tool control system based on the hardware platform, as shown in Figure 4 , comprises the SOPC chip connected with the host computer, a pulse power module, a discharge gap detection module, a servo control module, a motion shaft module and an IO module, the pulse power module comprises a main vibration stage, an amplification stage and a power stage, as shown in Figure 4 、 Figure 5 and Figure 6 , the main vibration stage is replaced by a programmable logic unit in the SOPC; the discharge gap detection module comprises a discharge gap sampling circuit and a signal processor, as shown in Figure 4 、 Figure 5 and Figure 7 , the signal processor is replaced by a programmable logic unit in the SOPC; the servo control module comprises a servo controller and a servo driver, as shown in Figure 4 、 Figure 5 and Figure 8 , the servo controller is replaced by a hard core processor in the SOPC; the motion shaft module and the IO module are both connected with the hard core processor in the SOPC.

[0018] The essential feature of the SOPC is that it combines a hard core processor system (HPS) and a traditional field programmable gate array (FPGA) logic component. This architecture realizes the industrial standard AXI interface, and realizes the high-bandwidth and low-delay connection between the two parts of the chip. This means that the processor and the logic part can each play the best use, without the interface overhead between two separate chips. At the same time, the benefits of simplifying the system into a single chip are obtained, including the reduction of physical size and overall cost. The embodiment is based on the low-cost SOPC technology, and the corresponding peripheral circuit is designed on a single chip to realize the above-mentioned functional modules, has the advantages of high system integration, high performance, high flexibility, simple and easy maintenance, and is more suitable for the requirements of high speed, high precision and high reliability of the electrical discharge machining tool system.

Claims

1. A SOPC-based electrical discharge machining (EDM) control system, comprising a host computer, a pulse power supply module, a discharge gap detection module, a servo control module, a motion axis module, and an I / O module, wherein the pulse power supply module includes a master oscillator stage, an amplification stage, and a power stage; the discharge gap detection module includes a discharge gap sampling circuit and a signal processor; and the servo control module includes a servo controller and a servo driver, characterized in that, It also includes an SOPC chip connected to a host computer. The main oscillator stage is replaced by a programmable logic unit in the SOPC, the signal processor is replaced by a programmable logic unit in the SOPC, the servo controller is replaced by a hard-core processor in the SOPC, and the motion axis module and IO module are both connected to the hard-core processor in the SOPC.

2. The SOPC-based electrical discharge machining control system according to claim 1, characterized in that, The SOPC chip is either the Zynq-7000 series or the Cyclone V series.

Images