A control system for CNC EDM drilling machine tool for automobile fuel injector injection hole processing

Abstract

The invention discloses a control system for a CNC electric spark perforating machine tool for processing fuel injection holes of automobile fuel injectors, comprising an upper computer, the upper computer is respectively connected to a lower computer, a fine pulse power supply for micro-hole processing, a high-sensitivity servo feeding system for micro-hole processing and a touch display screen, the lower computer is respectively connected to a pneumatic fixture control circuit of an automobile fuel injector and an interface circuit of a loading and unloading manipulator of an automobile fuel injector, the pneumatic fixture control circuit of an automobile fuel injector is connected to a pneumatic fixture of an automobile fuel injector, the lower computer is respectively connected to an X-axis servo driver and a Y-axis servo driver, the X-axis servo driver and the Y-axis servo driver are respectively connected to an X-axis motor and a Y-axis motor, the fine pulse power supply for micro-hole processing is connected to a perforating discharge system, the perforating discharge system is connected to a high-sensitivity servo feeding system for micro-hole processing, and the high-sensitivity servo feeding system for micro-hole processing is connected to a perforating spindle system. The invention can quickly, stably and reliably complete the micro-hole processing of automobile fuel injectors, and greatly improve the yield rate.

Description

Technical Field

[0001] The invention belongs to the field of machine tool numerical control systems, and in particular relates to a numerical control electric spark perforating machine tool control system for machining fuel injection holes of automobile fuel injectors. Background Art

[0002] Automobile fuel injectors are usually made of nickel-chromium alloy, which has the characteristics of good rust resistance, high hardness and sufficient toughness. The traditional machining method for processing the fuel injection holes of automobile fuel injectors has a high scrap rate and the quality is difficult to meet the use requirements. Therefore, there is an urgent need for a control system for a CNC EDM perforating machine tool that is used on the production line to process the fuel injection holes of automobile fuel injectors. Summary of the invention

[0003] In order to meet the current and future market demand, the present invention provides a CNC electric spark perforating machine tool control system for processing fuel injection holes of automobile fuel injectors to solve the problem of difficulty in processing fuel injection holes of automobile fuel injectors.

[0004] In order to solve the above technical problems and achieve the above technical effects, the present invention is implemented through the following technical solutions:

[0005] A control system for a CNC electric spark perforating machine tool for processing fuel injection holes of automobile fuel injectors, comprising a host computer, a slave computer, an X-axis servo driver, a Y-axis servo driver, a fine pulse power supply for micro-hole processing, a high-sensitivity servo feeding system for micro-hole processing, and a touch display screen;

[0006] The upper computer is respectively connected to the lower computer, the micro-hole processing fine pulse power supply, the micro-hole processing high-sensitivity servo feed system and the touch display screen in communication, the lower computer is respectively connected to the automobile fuel injector pneumatic fixture control circuit and the automobile fuel injector loading and unloading manipulator interface circuit, the automobile fuel injector pneumatic fixture control circuit is connected to the automobile fuel injector pneumatic fixture located on the precision workbench, and the lower computer is respectively connected to the X-axis servo driver and the Y-axis servo driver in communication, the X-axis servo driver and the Y-axis servo driver are respectively connected to the X-axis motor and the Y-axis motor responsible for driving the precision workbench, the micro-hole processing fine pulse power supply is connected to the perforation discharge system, the perforation discharge system is connected to the micro-hole processing high-sensitivity servo feed system, and the micro-hole processing high-sensitivity servo feed system is connected to the perforation spindle system;

[0007] The host computer is the main control system, responsible for the position control of the machine tool, storage of processing data, construction of the processing database, control of the high-sensitivity servo feed system for micro-hole processing, control of the precise pulse power supply for micro-hole processing, intelligent feedback and correction of the servo position of the perforating spindle system, detection and display of the workpiece position, intelligent detection of the current of the fine pulse power supply for micro-hole processing, fault self-diagnosis, etc.

[0008] The lower computer is responsible for executing the instructions issued by the upper computer, including executing the control instructions of the precision workbench, the loading and unloading instructions of the workpiece, the response communication with the manipulator, and the on-site or remote alarm, etc.;

[0009] The X-axis servo driver and the Y-axis servo driver are responsible for controlling the operation of the X-axis motor and the Y-axis motor respectively according to the control signal of the lower computer;

[0010] The micro-hole processing fine pulse power supply is responsible for providing a high-frequency pulse power supply with adjustable current to the perforation discharge system according to the instructions of the host computer;

[0011] The micro-hole machining high-sensitivity servo feeding system is responsible for controlling the perforation spindle system to perform high-sensitivity servo feeding according to the instructions of the host computer, and is also responsible for detecting the current state and discharge state of the perforation discharge system, and feeding back to the host computer, etc.;

[0012] The touch screen serves as a human-machine communication platform and is responsible for displaying the operating status, monitoring data, and processing progress of the machine tool control system, as well as inputting operating instructions.

[0013] The CNC system of the machine tool of the present invention can control the precision workbench to complete the precise positioning of the automobile fuel injector, and can control the perforation spindle system of the perforation discharge system to perform high-sensitivity servo feeding, and can also intelligently adjust the current size and servo position of the electric pulse according to the online processing state during the electric spark perforation process, so as to stably and quickly promote the perforation process. At the same time, the CNC system of the machine tool of the present invention can perfectly coordinate the working sequence of the loading and unloading manipulator of the automobile fuel injector and the pneumatic fixture of the automobile fuel injector during the processing process, so as to stably and reliably complete the loading and unloading work of the automobile fuel injector.

[0014] Further, the host computer includes a host computer central processing unit, a processing database, a first host computer communication interface, a second host computer communication interface and a third host computer communication interface, the host computer central processing unit is respectively connected to the processing database, the first host computer communication interface, the second host computer communication interface and the third host computer communication interface, the first host computer communication interface is connected to the display screen communication interface on the touch screen, the second host computer communication interface is connected to the communication interface of the lower computer, and the third host computer communication interface is respectively connected to the communication interface of the micro-hole processing fine pulse power supply and the micro-hole processing high-sensitivity servo feed system;

[0015] The central processing unit of the host computer is responsible for receiving and processing input signals, generating and issuing control instructions, retrieving and saving processing data, constructing and rebuilding a processing database, receiving and processing feedback signals, and generating and sending output signals, etc.; the processing database is responsible for storing processing data required for the processing of fuel injection holes of automobile injectors, etc., the first communication interface of the host computer is responsible for the communication between the host computer and the touch display screen, etc., the second communication interface of the host computer is responsible for the communication between the host computer and the lower computer, etc., the third communication interface of the host computer is responsible for the communication between the host computer and the micro-hole processing fine pulse power supply and the micro-hole processing high-sensitivity servo feed system, etc.

[0016] Furthermore, the host computer includes an input interface connected to the host computer central processing unit, and the input interface is responsible for the communication connection between the host computer and input devices including a keyboard, a mouse, a microphone, a control panel, a control button, a control knob, etc.

[0017] Further, the lower computer includes a lower computer central processing unit, a lower computer communication interface, an I / O interface and an X / Y axis position control interface, the lower computer central processing unit is respectively connected to the lower computer communication interface, the I / O interface and the X / Y axis position control interface, the lower computer communication interface is connected to the corresponding communication interface on the upper computer, the I / O interface is respectively connected to the special fixture control signal interface in the automobile injector pneumatic fixture control circuit and the manipulator communication signal interface in the automobile injector loading and unloading manipulator interface circuit, and the X / Y axis position control interface is respectively connected to the corresponding communication interfaces on the X-axis motor and the Y-axis motor;

[0018] The central processing unit of the lower computer is responsible for receiving and processing control instructions from the upper computer, generating and sending control signals and communication signals, receiving and processing input signals, and feeding back input signals to the upper computer, etc.; the communication interface of the lower computer is responsible for the communication between the lower computer and the upper computer, etc., the I / O interface is responsible for the communication between the lower computer and the control circuit of the automobile injector pneumatic fixture and the communication with the interface circuit of the automobile injector loading and unloading robot, etc., the X / Y-axis position control interface is responsible for the communication between the lower computer and the X-axis motor and the Y-axis motor, etc.

[0019] Furthermore, the lower computer includes an X-axis, Y-axis, and Z-axis grating signal input interface connected to the lower computer central processing unit, and the X-axis, Y-axis, and Z-axis grating signal input interface is responsible for the communication connection between the lower computer and the gratings on the X-axis, Y-axis, and Z-axis for detecting the servo positions of the X-axis, Y-axis, and Z-axis.

[0020] Further, the micro-hole machining fine pulse power supply includes an intelligent pulse generator, a micro-hole machining fine pulse power supply communication interface and a micro-hole machining fine pulse power supply power amplifier, the intelligent pulse generator is respectively connected to the micro-hole machining fine pulse power supply communication interface and the micro-hole machining fine pulse power supply power amplifier, the micro-hole machining fine pulse power supply communication interface is connected to the corresponding communication interface on the host computer, and the micro-hole machining fine pulse power supply power amplifier is connected to the perforation discharge system;

[0021] The micro-hole machining fine pulse power supply communication interface is responsible for the communication between the micro-hole machining fine pulse power supply and the host computer, the intelligent pulse generator is responsible for the reception and processing of pulse power supply control instructions and the generation and regulation of high-frequency electric pulses, and the micro-hole machining fine pulse power supply power amplifier is responsible for the amplification and output of high-frequency electric pulse power.

[0022] Further, the micro-hole machining high-sensitivity servo feed system includes a drive control system, a micro-hole machining high-sensitivity servo feed system communication interface, a micro-hole machining high-sensitivity servo feed system power amplifier, an overcurrent protection module and a speed following system, the drive control system is respectively connected to the micro-hole machining high-sensitivity servo feed system communication interface, the micro-hole machining high-sensitivity servo feed system power amplifier, the overcurrent protection module and the speed following system, the micro-hole machining high-sensitivity servo feed system communication interface is connected to the corresponding communication interface on the host computer, the micro-hole machining high-sensitivity servo feed system power amplifier is connected to the perforation spindle system, and the overcurrent protection module and the speed following system are respectively connected to the perforation discharge system;

[0023] The drive control system is responsible for receiving and processing the control instructions of the perforating spindle system, generating the motor drive signal of the perforating spindle system, receiving and processing the overcurrent protection signal, receiving and processing the speed following signal, and feeding back the overcurrent protection signal and the speed following signal to the host computer, etc.; the communication interface of the micro-hole processing high-sensitivity servo feed system is responsible for the communication between the micro-hole processing high-sensitivity servo feed system and the host computer, etc., the power amplifier of the micro-hole processing high-sensitivity servo feed system is responsible for the amplification and output of the motor drive signal of the perforating spindle system, etc., the overcurrent protection module is responsible for receiving the current feedback signal of the perforating discharge system, and converting it into an overcurrent protection signal and transmitting it to the drive control system, etc., the speed following system is responsible for receiving the discharge state feedback signal of the perforating discharge system, and converting it into a speed following signal and transmitting it to the drive control system, etc.

[0024] Furthermore, both the host computer and the slave computer adopt a high-stability ARM controller.

[0025] Furthermore, the touch display screen adopts a touch liquid crystal display screen.

[0026] Furthermore, the host computer has a function of rebuilding a processing database, so that the user can obtain personalized optimal parameters according to the material of the workpiece and the size of the perforation diameter, and establish a user-created processing parameter library for subsequent use.

[0027] Furthermore, the host computer has a power failure memory function and is guaranteed by a backup battery, which is used to provide backup power to the storage chip at the moment of power failure, and at the same time send a power failure interrupt request to the host computer so that the host computer can protect the on-site information after responding to the interruption and resume processing after power supply is normal.

[0028] The beneficial effects of the present invention are:

[0029] 1. The present invention adopts a high-stability ARM controller and a touch screen as the main carrier for data processing and data transmission, and has a high-frequency pulse power supply automatic adjustment function and a servo feed self-adaptation function, which can monitor and control the micro-hole processing pulse power supply and the micro-hole processing high-sensitivity servo feed system in real time, so as to complete the micro-hole processing of automobile injectors quickly, stably and reliably, greatly improve the yield rate, and solve the problem of the difficulty in processing the injection holes of automobile injectors.

[0030] 2. The present invention can perfectly coordinate the working sequence of the loading and unloading manipulator of the automobile fuel injector and the pneumatic fixture of the automobile fuel injector, so as to work in coordination with the automobile fuel injector manipulator on the production line, with good coordination and high reliability. While realizing unmanned operation, it can also stably and reliably complete the loading and unloading work of the automobile fuel injector, thereby improving production efficiency.

[0031] 3. The control system of the present invention adopts the architecture of a host computer and a slave computer, and has good working stability and high reliability.

[0032] 4. The present invention adopts a touch screen as a human-computer communication platform, which can not only display the operating information of the system, but also display the detection information of the processing position. The display is clear and the operation is simple and convenient.

[0033] 5. The main control system of the present invention has a processing data reconstruction function, which can add processing data that is not originally in the construction database, thereby improving the processing capacity of the machine tool.

[0034] 6. The main control system of the present invention has a power failure memory function, which can continue to complete the task actions that need to be completed when the power is restored, avoiding task resetting.

[0035] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. The specific implementation of the present invention is given in detail by the following embodiments and their accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0037] Figure 1 It is a system block diagram of the machine tool numerical control system of the present invention. DETAILED DESCRIPTION

[0038] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. The descriptions herein are used to provide a further understanding of the present invention and constitute a part of this application. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0039] See also Figure 1 As shown, a control system for a CNC electric spark perforating machine tool for processing fuel injection holes of automobile fuel injectors includes a host computer 1, a slave computer 2, an X-axis servo driver 3, a Y-axis servo driver 4, a fine pulse power supply 5 for micro-hole processing, a high-sensitivity servo feeding system 6 for micro-hole processing, and a touch display screen 7;

[0040] The upper computer 1 is respectively connected to the lower computer 2, the micro-hole processing fine pulse power supply 5, the micro-hole processing high-sensitivity servo feed system 6 and the touch screen 7 in communication, the lower computer 2 is respectively connected to the automobile fuel injector pneumatic fixture control circuit 8 and the automobile fuel injector loading and unloading manipulator interface circuit 9, the automobile fuel injector pneumatic fixture control circuit 8 is connected to the automobile fuel injector pneumatic fixture 10 located on the precision workbench, and the lower computer 2 is respectively connected to the X-axis servo driver 3 and the Y-axis servo driver 4 in communication, and the X-axis servo driver 3 and the Y-axis servo driver 4 are respectively connected to the X-axis motor 11 and the Y-axis motor 12 responsible for driving the precision workbench, the micro-hole processing fine pulse power supply 5 is connected to the perforation discharge system 13, the perforation discharge system 13 is connected to the micro-hole processing high-sensitivity servo feed system 6, and the micro-hole processing high-sensitivity servo feed system 6 is connected to the perforation spindle system 14 in communication;

[0041] The host computer 1 is the main control system, which is responsible for the position control of the machine tool, the storage of processing data, the construction of the processing database, the control of the high-sensitivity servo feed system for micro-hole processing, the control of the precise pulse power supply for micro-hole processing, the intelligent feedback and correction of the servo position of the perforating spindle system, the detection and display of the workpiece position, the intelligent detection of the fine pulse power supply current for micro-hole processing, and the self-diagnosis of faults.

[0042] The lower computer 2 is responsible for executing the instructions issued by the upper computer 1, including executing the control instructions of the precision workbench, the loading and unloading instructions of the workpiece, the response communication with the manipulator, and the on-site or remote alarm, etc.;

[0043] The X-axis servo driver 3 and the Y-axis servo driver 4 are responsible for controlling the operation of the X-axis motor 11 and the Y-axis motor 12 according to the control signal of the lower computer 2;

[0044] The micro-hole processing fine pulse power supply 5 is responsible for providing a high-frequency pulse power supply with adjustable current to the perforation discharge system 13 according to the instruction of the host computer 1;

[0045] The micro-hole machining high-sensitivity servo feeding system 6 is responsible for controlling the perforation spindle system 14 to perform high-sensitivity servo feeding according to the instructions of the host computer 1, and is also responsible for detecting the current state and discharge state of the perforation discharge system 13, and feeding back to the host computer 1, etc.;

[0046] The touch screen 7 serves as a human-machine communication platform and is responsible for displaying the operating status, monitoring data, and processing progress of the machine tool control system, as well as inputting operating instructions.

[0047] Further, the host computer 1 includes a host computer central processing unit 101, a processing database 102, a host computer first communication interface 103, a host computer second communication interface 104 and a host computer third communication interface 105, the host computer central processing unit 101 is respectively connected to the processing database 102, the host computer first communication interface 103, the host computer second communication interface 104 and the host computer third communication interface 105, the host computer first communication interface 103 is connected to the display screen communication interface 701 on the touch screen 7, the host computer second communication interface 104 is connected to the communication interface of the lower computer 2, and the host computer third communication interface 105 is respectively connected to the communication interface of the micro-hole processing fine pulse power supply 5 and the micro-hole processing high-sensitivity servo feed system 6;

[0048] The host computer central processor 101 is responsible for receiving and processing input signals, generating and issuing control instructions, retrieving and storing processing data, constructing and rebuilding a processing database, receiving and processing feedback signals, and generating and sending output signals; the processing database 102 is responsible for storing processing data required for processing fuel injection holes of automobile injectors, etc. The host computer first communication interface 103 is responsible for communication between the host computer 1 and the touch screen 7, etc. The host computer second communication interface 104 is responsible for communication between the host computer 1 and the slave computer 2, etc. The host computer third communication interface 105 is responsible for communication between the host computer 1 and the micro-hole processing fine pulse power supply 5 and the micro-hole processing high-sensitivity servo feed system 6, etc.

[0049] Furthermore, the host computer 1 includes an input interface 106 connected to the host computer central processor 101, and the input interface 106 is responsible for the communication connection between the host computer 1 and input devices including a keyboard, a mouse, a microphone, a control panel, a control button, a control knob, etc.

[0050] Further, the lower computer 2 includes a lower computer central processor 201, a lower computer communication interface 202, an I / O interface 203 and an X / Y axis position control interface 204, the lower computer central processor 201 is respectively connected to the lower computer communication interface 202, the I / O interface 203 and the X / Y axis position control interface 204, the lower computer communication interface 202 is connected to the corresponding communication interface on the upper computer 1, the I / O interface 203 is respectively connected to the special fixture control signal interface in the automobile injector pneumatic fixture control circuit 8 and the manipulator contact signal interface in the automobile injector loading and unloading manipulator interface circuit 9, and the X / Y axis position control interface 204 is respectively connected to the corresponding communication interfaces on the X-axis motor 11 and the Y-axis motor 12;

[0051] The lower computer central processor 201 is responsible for receiving and processing control instructions from the upper computer 1, generating and sending control signals and communication signals, receiving and processing input signals, and feeding back input signals to the upper computer 1, etc.; the lower computer communication interface 202 is responsible for the communication between the lower computer 2 and the upper computer 1, etc., the I / O interface 203 is responsible for the communication between the lower computer 2 and the automobile injector pneumatic fixture control circuit 8 and the communication with the automobile injector loading and unloading robot interface circuit 9, etc., the X / Y axis position control interface 204 is responsible for the communication between the lower computer 2 and the X-axis motor 11 and the Y-axis motor 12, etc.

[0052] Furthermore, the lower computer 2 includes an X, Y, and Z-axis grating signal input interface 205 connected to the lower computer central processor 201, and the X, Y, and Z-axis grating signal input interface 205 is responsible for the communication connection between the lower computer 2 and the gratings on the X-axis, Y-axis, and Z-axis for detecting the servo positions of the X-axis, Y-axis, and Z-axis.

[0053] Further, the micro-hole machining fine pulse power supply 5 includes an intelligent pulse generator 501, a micro-hole machining fine pulse power supply communication interface 502 and a micro-hole machining fine pulse power supply power amplifier 503, the intelligent pulse generator 501 is respectively connected to the micro-hole machining fine pulse power supply communication interface 502 and the micro-hole machining fine pulse power supply power amplifier 503, the micro-hole machining fine pulse power supply communication interface 502 is connected to the corresponding communication interface on the host computer 1, and the micro-hole machining fine pulse power supply power amplifier 503 is connected to the perforation discharge system 13;

[0054] The micro-hole machining fine pulse power supply communication interface 502 is responsible for the communication between the micro-hole machining fine pulse power supply 5 and the host computer 1, etc., the intelligent pulse generator 501 is responsible for the reception and processing of pulse power supply control instructions and the generation and adjustment of high-frequency electric pulses, etc., and the micro-hole machining fine pulse power supply power amplifier 503 is responsible for the amplification and output of high-frequency electric pulse power, etc.

[0055] Further, the micro-hole machining high-sensitivity servo feed system 6 includes a drive control system 601, a micro-hole machining high-sensitivity servo feed system communication interface 602, a micro-hole machining high-sensitivity servo feed system power amplifier 603, an overcurrent protection module 604 and a speed following system 605, the drive control system 601 is respectively connected to the micro-hole machining high-sensitivity servo feed system communication interface 602, the micro-hole machining high-sensitivity servo feed system power amplifier 603, the overcurrent protection module 604 and the speed following system 605, the micro-hole machining high-sensitivity servo feed system communication interface 602 is connected to the corresponding communication interface on the host computer 1, the micro-hole machining high-sensitivity servo feed system power amplifier 603 is connected to the perforation spindle system 14, and the overcurrent protection module 604 and the speed following system 605 are respectively connected to the perforation discharge system 13;

[0056] The drive control system 601 is responsible for receiving and processing the control instructions of the perforating spindle system, generating the motor drive signal of the perforating spindle system, receiving and processing the overcurrent protection signal, receiving and processing the speed following signal, and feeding back the overcurrent protection signal and the speed following signal to the host computer 1; the micro-hole processing high-sensitivity servo feed system communication interface 602 is responsible for the communication between the micro-hole processing high-sensitivity servo feed system 6 and the host computer 1, etc., the micro-hole processing high-sensitivity servo feed system power amplifier 603 is responsible for the amplification and output of the motor drive signal of the perforating spindle system, etc., the overcurrent protection module 604 is responsible for receiving the current feedback signal of the perforating discharge system 13, and converting it into an overcurrent protection signal and transmitting it to the drive control system 601, etc., the speed following system 605 is responsible for receiving the discharge state feedback signal of the perforating discharge system 13, and converting it into a speed following signal and transmitting it to the drive control system 601, etc.

[0057] Furthermore, both the host computer 1 and the slave computer 2 adopt a high-stability ARM controller.

[0058] Furthermore, the touch screen 7 is a touch liquid crystal display.

[0059] Furthermore, the host computer 1 has a function of rebuilding a processing database, so that the user can obtain personalized optimal parameters according to the material of the workpiece and the size of the perforation diameter, and establish a user-created processing parameter library for subsequent use.

[0060] Furthermore, the host computer 1 has a power failure memory function and is guaranteed by a backup battery, which is used to provide backup power to the storage chip at the moment of power failure, and at the same time send a power failure interrupt request to the host computer 1 so that the host computer 1 can protect the on-site information after responding to the interruption and resume processing after the power supply is normal.

[0061] The working principle of the present invention is as follows:

[0062] First, the staff inputs or selects the processing mode through the touch screen 7. The upper computer 1 retrieves the processing data required for processing from the processing database 102 according to the input or selected processing mode. Then the upper computer 1 generates a processing instruction and issues it to the lower computer 2. The lower computer 2 controls the automobile fuel injector loading and unloading robot to pick up a workpiece and put it into the automobile fuel injector pneumatic fixture 10 on the precision workbench through the automobile fuel injector pneumatic fixture control circuit 8. Then the lower computer 2 controls the automobile fuel injector pneumatic fixture 10 to clamp the workpiece through the automobile fuel injector pneumatic fixture control circuit 8. Then the lower computer 2 controls the X-axis motor 11 and the Y-axis motor 12 of the precision workbench through the X-axis servo driver 3 and the Y-axis servo driver 4, so that the precision workbench can complete the precise positioning of the automobile fuel injector.

[0063] After the workpiece is positioned, the host computer 1 controls the punching spindle system 14 through the micro-hole processing high-sensitivity servo feed system 6, so that the punching spindle system 14 drives the punching discharge system 13 to perform high-sensitivity servo feed to the workpiece. At the same time, the host computer 1 controls the punching discharge system 13 through the micro-hole processing fine pulse power supply 5, so that the punching discharge system 13 performs electric spark punching on the workpiece. During the electric spark punching process, the micro-hole processing high-sensitivity servo feed system 6 will monitor the current size and discharge state of the punching discharge system 13 in real time, and respectively send the current feedback signal and the discharge state feedback signal back to the host computer 1 in real time. The host computer 1 determines whether it is necessary to adjust the feed speed of the punching spindle system 14, whether it is necessary to adjust the electric pulse current size of the punching discharge system 13, and whether it is necessary to take overcurrent protection for the punching discharge system 13, so as to promote the punching process stably and quickly.

[0064] If it is necessary to adjust the feed speed of the perforating spindle system 14, the host computer 1 controls the micro-hole processing high-sensitivity servo feed system 6 to change the feed speed of the perforating spindle system 14; if it is necessary to adjust the electric pulse current of the perforating discharge system 13, the host computer 1 controls the micro-hole processing fine pulse power supply 5 to change the current size of the pulse power supply provided to the perforating discharge system 13; if it is necessary to take overcurrent protection for the perforating discharge system 13, the host computer controls the perforating spindle system 14 and the perforating discharge system 13 to stop working through the micro-hole processing high-sensitivity servo feed system 6 and the micro-hole processing fine pulse power supply 5 respectively.

[0065] At the same time, during the EDM perforation process, the upper computer 1 will display the received machine tool operation status, monitoring data, processing progress and other information on the touch screen 7 in real time. The touch screen 7 serves as a human-machine communication platform and can also input operation instructions to the upper computer 1. The upper computer 1 will perform self-diagnosis based on the received machine tool operation status, monitoring data and other information. If it is determined that the machine tool is working abnormally, it will issue a fault alarm instruction to the lower computer 2, and the lower computer 2 will control the relevant alarm device to make a fault alarm.

[0066] After the EDM perforation is completed, the upper computer 1 controls the reset of the perforation spindle system 14 and the perforation discharge system 13 through the micro-hole processing high-sensitivity servo feed system 6 and the micro-hole processing fine pulse power supply 5, and issues instructions to the lower computer 2. The lower computer 2 controls the reset of the precision workbench through the X-axis servo driver 3 and the Y-axis servo driver 4, and then controls the automobile fuel injector pneumatic fixture 10 to release the workpiece through the automobile fuel injector pneumatic fixture control circuit 8. Finally, the automobile fuel injector loading and unloading robot interface circuit 9 controls the automobile fuel injector loading and unloading robot to remove the processed workpiece from the automobile fuel injector pneumatic fixture 10, and replace the next workpiece to be processed, and repeat the cycle to achieve fast, automatic and continuous perforation processing of automobile fuel injectors.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A control system for a CNC electric spark perforating machine tool for processing fuel injection holes of automobile fuel injectors, characterized in that: It includes an upper computer (1), a lower computer (2), an X-axis servo driver (3), a Y-axis servo driver (4), a micro-hole processing fine pulse power supply (5), a micro-hole processing high-sensitivity servo feeding system (6) and a touch screen (7); The upper computer (1) is respectively connected to the lower computer (2), the micro-hole processing fine pulse power supply (5), the micro-hole processing high-sensitivity servo feeding system (6) and the touch screen (7); the lower computer (2) is respectively connected to the automobile fuel injector pneumatic fixture control circuit (8) and the automobile fuel injector loading and unloading manipulator interface circuit (9); the automobile fuel injector pneumatic fixture control circuit (8) is connected to the automobile fuel injector pneumatic fixture (10) located on the precision workbench; and the lower computer (2) is respectively connected to the X-axis The servo driver (3) is connected in communication with the Y-axis servo driver (4), the X-axis servo driver (3) and the Y-axis servo driver (4) are connected in communication with the X-axis motor (11) and the Y-axis motor (12) responsible for driving the precision worktable, respectively, the micro-hole machining fine pulse power supply (5) is connected with the perforation discharge system (13), the perforation discharge system (13) is connected in communication with the micro-hole machining high-sensitivity servo feed system (6), and the micro-hole machining high-sensitivity servo feed system (6) is connected in communication with the perforation spindle system (14); The host computer (1) is the main control system, which is responsible for the following tasks including the position control of the machine tool, the storage of processing data, the construction of a processing database, the control of a high-sensitivity servo feed system for micro-hole processing, the control of a precise pulse power supply for micro-hole processing, the intelligent feedback and correction of the servo position of the punching spindle system, the detection and display of the workpiece position, the intelligent detection of the current of the fine pulse power supply for micro-hole processing, and fault self-diagnosis; The lower computer (2) is responsible for executing the instructions issued by the upper computer (1), including executing the instructions for controlling the precision workbench, loading and unloading workpieces, responding to and communicating with the robot, and on-site or remote alarms; The X-axis servo driver (3) and the Y-axis servo driver (4) are respectively responsible for correspondingly controlling the operation of the X-axis motor (11) and the Y-axis motor (12) according to the control signal of the lower computer (2); The micro-hole processing fine pulse power supply (5) is responsible for providing a high-frequency pulse power supply with adjustable current to the perforation discharge system (13) according to the instruction of the host computer (1); The micro-hole processing high-sensitivity servo feeding system (6) is responsible for controlling the perforation spindle system (14) to perform high-sensitivity servo feeding according to the instructions of the host computer (1), and is also responsible for detecting the current state and discharge state of the perforation discharge system (13), and feeding back to the host computer (1); The touch screen (7) serves as a human-machine communication platform and is responsible for displaying the operating status, monitoring data, and processing progress of the machine tool control system, as well as inputting operating instructions.

2. The control system for the CNC electric spark perforating machine tool for processing the fuel injection hole of the automobile fuel injector according to claim 1 is characterized by: The host computer (1) comprises a host computer central processing unit (101), a processing database (102), a host computer first communication interface (103), a host computer second communication interface (104) and a host computer third communication interface (105); the host computer central processing unit (101) is respectively connected to the processing database (102), the host computer first communication interface (103), the host computer second communication interface (104) and the host computer third communication interface (105); the host computer first communication interface (103) is connected to a display screen communication interface (701) on the touch screen (7); the host computer second communication interface (104) is connected to a communication interface of the lower computer (2); and the host computer third communication interface (105) is respectively connected to a communication interface of the micro-hole processing fine pulse power supply (5) and a communication interface of the micro-hole processing high-sensitivity servo feed system (6); The host computer central processing unit (101) is responsible for receiving and processing input signals, generating and issuing control instructions, retrieving and storing processing data, constructing and rebuilding a processing database, receiving and processing feedback signals, and generating and sending output signals; the processing database (102) is responsible for storing processing data required for processing the injection holes of automobile injectors; the host computer first communication interface (103) is responsible for communication between the host computer (1) and the touch screen (7); the host computer second communication interface (104) is responsible for communication between the host computer (1) and the slave computer (2); and the host computer third communication interface (105) is responsible for communication between the host computer (1) and the micro-hole processing fine pulse power supply (5) and the micro-hole processing high-sensitivity servo feed system (6).

3. The control system for the CNC electric spark perforating machine tool for processing the fuel injection hole of the automobile fuel injector according to claim 2 is characterized by: The host computer (1) includes an input interface (106) connected to the host computer central processing unit (101), and the input interface (106) is responsible for the communication connection between the host computer (1) and input devices including a keyboard, a mouse, a microphone, a control panel, a control button, and a control knob.

4. The control system for the CNC electric spark perforating machine tool for processing the fuel injection hole of the automobile fuel injector according to claim 1 is characterized by: The lower computer (2) comprises a lower computer central processing unit (201), a lower computer communication interface (202), an I / O interface (203) and an X / Y axis position control interface (204); the lower computer central processing unit (201) is respectively connected to the lower computer communication interface (202), the I / O interface (203) and the X / Y axis position control interface (204); the lower computer communication interface (202) is connected to a corresponding communication interface on the upper computer (1); the I / O interface (203) is respectively connected to a special fixture control signal interface in the automobile injector pneumatic fixture control circuit (8) and a manipulator communication signal interface in the automobile injector loading and unloading manipulator interface circuit (9); and the X / Y axis position control interface (204) is respectively connected to corresponding communication interfaces on the X-axis motor (11) and the Y-axis motor (12); The lower computer central processing unit (201) is responsible for receiving and processing control instructions from the upper computer (1), generating and sending control signals and communication signals, receiving and processing input signals, and feeding back input signals to the upper computer (1); the lower computer communication interface (202) is responsible for communication between the lower computer (2) and the upper computer (1); the I / O interface (203) is responsible for communication between the lower computer (2) and the automobile injector pneumatic fixture control circuit (8) and communication with the automobile injector loading and unloading robot interface circuit (9); the X / Y axis position control interface (204) is responsible for communication between the lower computer (2) and the X axis motor (11) and the Y axis motor (12).

5. The control system for the CNC electric spark perforating machine tool for processing the fuel injection hole of the automobile fuel injector according to claim 4 is characterized by: The lower computer (2) comprises an X, Y, and Z axis grating signal input interface (205) connected to the lower computer central processor (201), and the X, Y, and Z axis grating signal input interface (205) is responsible for the communication connection between the lower computer (2) and the gratings on the X axis, Y axis, and Z axis for detecting the servo positions of the X axis, Y axis, and Z axis.

6. The control system for the CNC electric spark perforating machine tool for processing the fuel injection hole of the automobile fuel injector according to claim 1 is characterized by: The micro-hole machining fine pulse power supply (5) comprises an intelligent pulse generator (501), a micro-hole machining fine pulse power supply communication interface (502) and a micro-hole machining fine pulse power supply power amplifier (503), wherein the intelligent pulse generator (501) is respectively connected to the micro-hole machining fine pulse power supply communication interface (502) and the micro-hole machining fine pulse power supply power amplifier (503), the micro-hole machining fine pulse power supply communication interface (502) is connected to a corresponding communication interface on the host computer (1), and the micro-hole machining fine pulse power supply power amplifier (503) is connected to the perforation discharge system (13); The micro-hole machining fine pulse power supply communication interface (502) is responsible for the communication between the micro-hole machining fine pulse power supply (5) and the host computer (1), the intelligent pulse generator (501) is responsible for receiving and processing pulse power supply control instructions and generating and adjusting high-frequency electric pulses, and the micro-hole machining fine pulse power supply power amplifier (503) is responsible for amplifying and outputting high-frequency electric pulse power.

7. The control system for the CNC electric spark perforating machine tool for processing the fuel injection hole of the automobile fuel injector according to claim 1 is characterized by: The micro-hole machining high-sensitivity servo feed system (6) comprises a drive control system (601), a micro-hole machining high-sensitivity servo feed system communication interface (602), a micro-hole machining high-sensitivity servo feed system power amplifier (603), an overcurrent protection module (604) and a speed following system (605); the drive control system (601) is respectively connected to the micro-hole machining high-sensitivity servo feed system communication interface (602), the micro-hole machining high-sensitivity servo feed system power amplifier (603), the overcurrent protection module (604) and the speed following system (605); the micro-hole machining high-sensitivity servo feed system communication interface (602) is connected to a corresponding communication interface on the host computer (1); the micro-hole machining high-sensitivity servo feed system power amplifier (603) is connected to the perforation spindle system (14); the overcurrent protection module (604) and the speed following system (605) are respectively connected to the perforation discharge system (13); The drive control system (601) is responsible for receiving and processing the control instructions of the perforating spindle system, generating the motor drive signal of the perforating spindle system, receiving and processing the overcurrent protection signal, receiving and processing the speed following signal, and feeding back the overcurrent protection signal and the speed following signal to the host computer (1); the micro-hole processing high-sensitivity servo feed system communication interface (602) is responsible for the communication between the micro-hole processing high-sensitivity servo feed system (6) and the host computer (1); the micro-hole processing high-sensitivity servo feed system power amplifier (603) is responsible for amplifying and outputting the motor drive signal of the perforating spindle system; the overcurrent protection module (604) is responsible for receiving the current feedback signal of the perforating discharge system (13), converting it into an overcurrent protection signal and transmitting it to the drive control system (601); the speed following system (605) is responsible for receiving the discharge state feedback signal of the perforating discharge system (13), converting it into a speed following signal and transmitting it to the drive control system (601).

8. The control system for the CNC electric spark perforating machine tool for processing the fuel injection hole of the automobile fuel injector according to claim 1 is characterized by: The upper computer (1) and the lower computer (2) both adopt ARM controllers.

9. The control system for the CNC electric spark perforating machine tool for processing the fuel injection hole of the automobile fuel injector according to claim 1 is characterized by: The host computer (1) has a processing database reconstruction function, so that the user can obtain personalized optimal parameters according to the material of the workpiece and the size of the perforation diameter, and establish a user-created processing parameter library for subsequent use.

10. The control system for the CNC electric spark perforating machine tool for processing the fuel injection hole of the automobile fuel injector according to claim 1, characterized in that: The host computer (1) has a power failure memory function and is guaranteed by a backup battery, which is used to provide backup power to the storage chip at the moment of power failure and send a power failure interrupt request to the host computer (1) so that the host computer (1) can protect the on-site information after responding to the interruption and resume processing after the power supply is normal.

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