An intelligent junction box for automobile stamping die identification and control and its use method

Abstract

The present invention provides an intelligent junction box for automobile stamping die identification control and a method for using the same. The intelligent junction box for automobile stamping die identification control includes an intelligent junction box body and an intelligent junction box circuit system. The intelligent junction box body includes a junction box shell, and a power interface, a signal detection input interface, a configuration interface, a heavy-load output interface and an information display window are provided on the junction box shell. The intelligent junction box circuit system includes an MCU, and the MCU is electrically connected to a display unit, a shift register, an RS232 interface chip and a high-side switch, respectively. The present invention can easily set the press mold number bit setting through a handheld programmer, save a lot of wiring work, and simplify the equipment connection; it has a display function, realizes the visualization of the working mode and press mold coding, and facilitates on-site error troubleshooting. The present invention is convenient for disassembly and on-site installation during transportation, greatly shortens the customer's on-site installation and coding time, and ensures the reliability of the equipment while shortening the working hours.

Description

Technical Field

[0001] The invention relates to the field of automobile manufacturing, and in particular to an automobile stamping die identification and control intelligent junction box and a use method thereof. Background Art

[0002] The traditional solution for automotive stamping die identification is to connect the sensor to a junction box, where the terminals are used for jumpering or jumpering is performed inside a heavy-duty connector to achieve the function of die identification. The disadvantages of this conventional approach are:

[0003] 1. Each automobile production site has hundreds or even thousands of molds. Each mold has a different coding bit, and each mold corresponds to 6-8 presses. The numbering bits of each mold and press on site must be jumpered in binary coding, so that the PLC can detect high and low levels and identify the corresponding mold press numbering bits. Therefore, jumpering the mold press numbering bits of the entire automobile production site is a huge wiring project.

[0004] 2. Since the sensor wiring and mold identification jumper are all in the terminal box or heavy-duty connector, it is very difficult to troubleshoot errors. It requires very professional people to operate, and once a problem occurs, it is very difficult to troubleshoot the error.

[0005] 3. The terminal box is very large, which affects the appearance.

[0006] Therefore, developing an intelligent junction box for automobile stamping die identification and control and a method for using the same is an urgent problem to be solved. Summary of the invention

[0007] The present invention aims to solve the above technical problems and provides an automobile stamping die identification and control intelligent junction box and a method of using the same.

[0008] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0009] An automobile stamping die identification and control intelligent junction box, comprising an intelligent junction box body and an intelligent junction box circuit system;

[0010] The intelligent junction box body comprises a junction box housing, on which a power interface, a signal detection input interface, a configuration interface, a heavy load output interface and an information display window are arranged;

[0011] The intelligent junction box circuit system includes an MCU, which is electrically connected to a display unit, a shift register, an RS232 interface chip and a high-side switch respectively; the shift register is electrically connected to a signal detection input interface through an isolation circuit, the RS232 interface chip is electrically connected to a configuration interface, the high-side switch is electrically connected to a heavy-load output interface, and the display unit is installed on an information display window; the power supply interface is connected to an external power supply, and the external power supply is converted into a +3.3V power supply through a DC / DC conversion chip after being filtered and protected by an EMC protection circuit, and the +3.3V power supply supplies power to the intelligent junction box circuit system.

[0012] Furthermore, the configuration interface is an RS232 communication interface, and the handheld programmer is connected to the configuration interface. The signal detection input interface is connected to the sensor, and the sensor collects incoming material information. Under different press machine and mold number positions and different working modes, the number of sensors used for incoming material detection and the position of the sensor collecting incoming material information are different.

[0013] Furthermore, the power interface is a 3-core M8 interface, which enables the junction box to be powered independently and external sensor testing can be performed without connecting to the press; the signal detection input interface is a 5-core M12 interface.

[0014] Furthermore, the intelligent junction box has 10 signal detection input interfaces, the configuration interface is a 4-core M8 interface, and the heavy-duty output interface uses a LAPP cable digital core.

[0015] Further, the MCU model is STM32F407VGT6. The DC / DC conversion chip model is XR79203EL-F. The shift register model is SN74HC165. The RS232 interface chip model is MAX3232IPWR. The high-side switch model is MAX14912AKN+. The isolation circuit includes IS281GB, and the EMC protection circuit includes SMCJ30CA. The display unit includes a digital tube and an LED lamp.

[0016] The method of using the above-mentioned automobile stamping die identification control intelligent junction box is as follows:

[0017] The first step is to enter the operator authentication code on the handheld programmer for identity authentication.

[0018] The second step is to set the mold number bit on the handheld programmer after passing the identity verification. First enter the mold number bit command, and then enter the decimal mold number bit in the range of 0-1023. The mold number bit corresponds to heavy-duty wire cores 30 to 39.

[0019] Step 3: Set the press number. Set the press number on the handheld programmer. First enter the press number command, then enter the press number in decimal in the range of 0-7. The press number corresponds to heavy-duty cores 40, 41, and 42.

[0020] Step 4: Work mode setting. Set the work mode on the handheld programmer. First enter the mold work mode command, and then enter the decimal work mode in the range of 0-3. The work modes of the press mold include bilateral production, left single-sided production, and right single-sided production. Work mode 0: The press works when there are parts on the left and right sides (corresponding to heavy-load wire cores 8-9-10-11). Work mode 1: The press works when there are parts on the left and no parts on the right (corresponding to heavy-load wire cores 8-9). Work mode 2: The press works when there are no parts on the left and there are parts on the right (heavy-load wire cores 10-11). In addition, more work modes can be set according to needs.

[0021] Furthermore, the configuration information input by the handheld programmer is connected to the UART interface of the MCU through the RS232 interface chip via the configuration interface. After the handheld programmer and the MCU establish communication, the MCU receives the configuration command and parses to obtain parameters such as the working mode, press number position, mold number position, etc. This parameter information is displayed in the display unit, which is installed in the information display window. The display of the working mode, press number position, and mold number position makes the on-site errors intuitive and the error troubleshooting is convenient and quick. At the same time, this parameter is stored in the buffer area of ​​the MCU.

[0022] Furthermore, the signal detection input interface is connected to the sensor, and the sensor collects the incoming material information. Under different presses, mold number positions, and different working modes, the number of sensors used for incoming material detection and the position of the sensor collecting incoming material information are all different. The signal detection input interface inputs the sensor signal to the isolation circuit, and the shift register converts the parallel signal output by the isolation circuit into a serial signal and transmits it to the MCU through the SPI1 communication interface. The sensor input signal received by the MCU is processed and logically operated with the configuration parameters of the handheld programmer obtained by the MCU analysis to analyze whether the incoming material is in place. After the incoming material is in place, according to the set working mode, the MCU outputs a 10-bit binary mold number position control signal, a 3-bit binary press number position control signal, and a 4-bit binary working mode control signal. The MCU outputs the control signal and enters the high-side switch through SPI2, and the high-side switch outputs high and low levels on the heavy-load wire core corresponding to the heavy-load output interface.

[0023] Furthermore, the PLC detects the high and low level signals of the heavy-duty core to identify the press number, mold number, and working mode, thereby controlling the corresponding press. The output signal current of the heavy-duty core can reach 0.5A, and each output signal has a short-circuit protection function.

[0024] The advantages and positive effects of the present invention are:

[0025] 1. The present invention can easily set the press mold numbering position through a handheld programmer, saving a lot of wiring work and simplifying equipment connection.

[0026] 2. The present invention has a display function, which realizes the visualization of working mode and press mold coding, and facilitates on-site error troubleshooting.

[0027] 3. The present invention facilitates disassembly during transportation and on-site installation, greatly shortening the customer's on-site installation and coding time, thereby shortening working hours and ensuring the reliability of the equipment.

[0028] 4. The present invention can be set in different working modes and has an independent power supply system, so the test can be carried out when not connected to the press. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the intelligent junction box of the present invention;

[0030] Figure 2 It is a principle block diagram of the present invention.

[0031] In the figure:

[0032] 1. Power interface; 2. Signal detection input interface; 3. Configuration interface; 4. Heavy load output interface; 5. Information display window; 6. Junction box housing. DETAILED DESCRIPTION

[0033] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0034] like Figure 1-2 As shown, an intelligent junction box for automobile stamping die identification and control includes an intelligent junction box body and an intelligent junction box circuit system; the intelligent junction box body includes a junction box shell 6, on which a power interface 1, a signal detection input interface 2, a configuration interface 3, a heavy-load output interface 4 and an information display window 5 are provided; the intelligent junction box circuit system includes an MCU, and the MCU is electrically connected to a display unit, a shift register, an RS232 interface chip and a high-side switch respectively, the shift register is electrically connected to the signal detection input interface 2 through an isolation circuit, the RS232 interface chip is electrically connected to the configuration interface 3, the high-side switch is electrically connected to the heavy-load output interface 4, and the display unit is installed on the information display window 5; the power interface 1 is connected to an external power supply, and the external power supply is converted into a +3.3V power supply through a DC / DC conversion chip after being filtered and protected by an EMC protection circuit, and the +3.3V power supply supplies power to the intelligent junction box circuit system.

[0035] The configuration interface 3 is an RS232 communication interface, and the handheld programmer is connected to the configuration interface 3. The signal detection input interface 2 is connected to the sensor, and the sensor collects incoming material information. The number of sensors used for incoming material detection and the location of the sensors collecting incoming material information are different for different presses and mold numbers and different working modes. The power interface 1 is a 3-core M8 interface, which enables the junction box to be independently powered and external sensor testing can be performed without connecting to the press; the signal detection input interface 2 is a 5-core M12 interface. This intelligent junction box body has 10 signal detection input interfaces 2, the configuration interface 3 is a 4-core M8 interface, and the heavy-duty output interface 4 uses the LAPP cable digital core.

[0036] The MCU model is STM32F407VGT6. The DC / DC conversion chip model is XR79203EL-F. The shift register model is SN74HC165. The RS232 interface chip model is MAX3232IPWR. The high-side switch model is MAX14912AKN+. The isolation circuit is a conventional circuit design, consisting of components such as IS281GB optocouplers. The EMC protection circuit is a conventional circuit design, consisting of components such as SMCJ30CA TVS. The display unit is a conventional circuit design, including a digital tube and an LED lamp.

[0037] There are hundreds or even thousands of molds at the automobile production site. Different molds are programmed with different mold number positions. Different molds correspond to multiple presses, so presses also have different press number positions. If the traditional solution is used, the settings of the mold number position, press number position, and working mode all require terminal wiring and jumper wiring in the junction box, which makes the wiring workload huge. The smart junction box can easily realize parameter configuration: first, enter the operator identity authentication command in the handheld programmer to prevent the operator from misoperating, and then use the handheld programmer to configure the working mode, press number position, mold number position and other parameters. The specific steps for parameter configuration of the smart junction box are as follows:

[0038] The first step is to enter the operator authentication code on the handheld programmer for identity authentication.

[0039] The second step is to set the mold number bit on the handheld programmer after passing the identity verification. First enter the mold number bit command, and then enter the decimal mold number bit in the range of 0-1023. The mold number bit corresponds to heavy-duty wire cores 30 to 39.

[0040] Step 3: Set the press number. Set the press number on the handheld programmer. First enter the press number command, then enter the press number in decimal in the range of 0-7. The press number corresponds to heavy-duty cores 40, 41, and 42.

[0041] Step 4: Work mode setting. Set the work mode on the handheld programmer. First enter the mold work mode command, and then enter the decimal work mode in the range of 0-3. The work modes of the press mold include bilateral production, left single-sided production, and right single-sided production. Work mode 0: The press works when there are parts on the left and right sides (corresponding to heavy-load wire cores 8-9-10-11). Work mode 1: The press works when there are parts on the left and no parts on the right (corresponding to heavy-load wire cores 8-9). Work mode 2: The press works when there are no parts on the left and there are parts on the right (heavy-load wire cores 10-11). In addition, more work modes can be set according to needs.

[0042] The configuration information input by the handheld programmer is connected to the UART interface of the MCU through the RS232 interface chip via the configuration interface 3. After the communication between the handheld programmer and the MCU is established, the MCU receives the configuration instruction and parses to obtain parameters such as the working mode, press number position, mold number position and other information. This parameter information is displayed in the display unit, which is installed in the information display window 5. The display of the working mode, press number position, and mold number position makes the on-site errors intuitive and the error troubleshooting is convenient and fast. At the same time, this parameter is stored in the buffer area of ​​the MCU.

[0043] As attached Figure 2 As shown, the signal detection input interface 2 is connected to the sensor, and the sensor collects the incoming material information. The number of sensors used for incoming material detection and the location of the sensor collecting incoming material information are different for different presses and mold numbers and different working modes. The signal detection input interface 2 inputs the sensor signal to the isolation circuit, and the shift register converts the parallel signal output by the isolation circuit into a serial signal and transmits it to the MCU through the SPI1 communication interface. The sensor input signal received by the MCU is processed and logically operated with the configuration parameters of the handheld programmer obtained by the MCU analysis to analyze whether the incoming material is in place. After the incoming material is in place, according to the set working mode, the MCU outputs a 10-bit binary mold number control signal, a 3-bit binary press number control signal, and a 4-bit binary working mode control signal, as shown in the attached figure. Figure 2 As shown, the MCU output control signal enters the high-side switch through SPI2, and the high-side switch outputs high and low levels on the heavy-load core corresponding to the heavy-load output interface 4. For example, if the mold number is input "1 0 2 3", the corresponding heavy-load cores 30 to 39 are all high levels. If the press number is "0 0 1", the corresponding heavy-load core 40 is high, and the cores 41 and 42 are low.

[0044] The PLC detects the high and low level signals of the heavy-duty core to identify the press number, mold number, working mode and other information, thereby controlling the corresponding press. The output signal current of the heavy-duty core can reach 0.5A, and each output signal has a short-circuit protection function.

[0045] The intelligent junction box circuit system detects the input signal through the identification sensor, and outputs the press mold control signal according to the press mold parameter information input by the handheld programmer after logical operation, thereby realizing functions such as press mold control, press mold information display and short circuit alarm.

[0046] The present invention can easily set the press mold numbering bit settings through a handheld programmer, saving a lot of wiring work and simplifying equipment connection; different working modes can be set; it has an independent power supply system and can be tested without connecting the press; the present invention has a display function, realizes the visualization of working mode and press mold coding, and is convenient for on-site error troubleshooting; the present invention is convenient for disassembly during transportation and on-site installation, greatly shortening the customer's on-site installation and coding time, and ensuring the reliability of the equipment while shortening the working hours.

[0047] The embodiments of the present invention are described in detail above, but the contents described are only preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of this patent.

Claims

1. An intelligent junction box for automobile stamping die identification and control, characterized in that: It includes an intelligent junction box body and an intelligent junction box circuit system; The intelligent junction box body comprises a junction box housing, on which a power interface, a signal detection input interface, a configuration interface, a heavy load output interface and an information display window are arranged; The intelligent junction box circuit system includes an MCU, which is electrically connected to a display unit, a shift register, an RS232 interface chip and a high-side switch respectively; the shift register is electrically connected to a signal detection input interface through an isolation circuit; the RS232 interface chip is electrically connected to a configuration interface; the high-side switch is electrically connected to a heavy-load output interface; and the display unit is arranged on an information display window; the power supply interface is connected to an external power supply, and the external power supply is converted into a +3.3V power supply through a DC / DC conversion chip after passing through an EMC protection circuit; The configuration interface is an RS232 communication interface, and the handheld programmer is connected to the configuration interface; the signal detection input interface is connected to the sensor, and the sensor collects incoming material information; The MCU model is STM32F407VGT6, the DC / DC conversion chip model is XR79203EL-F, the shift register model is SN74HC165, the RS232 interface chip model is MAX3232IPWR, and the high-side switch model is MAX14912AKN+.

2. The intelligent junction box for automobile stamping die identification and control according to claim 1 is characterized in that: The power interface is a 3-core M8 interface, which enables the junction box to be powered independently and external sensor testing can be performed without connecting to the press; the signal detection input interface is a 5-core M12 interface.

3. The intelligent junction box for automobile stamping die identification and control according to claim 2 is characterized in that: The intelligent junction box has 10 signal detection input interfaces, the configuration interface is a 4-core M8 interface, and the heavy-load output interface uses a LAPP cable digital core.

4. A method for using the intelligent junction box for automobile stamping die identification and control according to claim 1, characterized in that: The process is as follows: The first step is to enter the operator authentication code on the handheld programmer for identity authentication; The second step is to set the mold number bit on the handheld programmer after identity verification. First, enter the mold number bit command, and then enter the decimal mold number bit in the range of 0-1023. The mold number bit corresponds to heavy-duty wire cores 30 to 39. Step 3: Press number setting: Set the press number on the handheld programmer; first enter the press number command, then enter the decimal press number in the range of 0-7. The press number corresponds to heavy-duty cores 40, 41, and 42; Step 4. Working mode setting: Set the working mode on the handheld programmer; first enter the mold working mode command, and then enter the decimal working mode in the range of 0-3; the working modes of the press mold include double-sided production, left-sided production and right-sided production working modes.

5. The method for using the intelligent junction box for automobile stamping die identification and control according to claim 4 is characterized in that: In the fourth step, working mode 0: the press (corresponding to heavy-load cores 8-9-10-11) works when there are pieces on the left and right sides; working mode 1: the press (corresponding to heavy-load cores 8-9) works when there are pieces on the left and no pieces on the right; working mode 2: the press (heavy-load cores 10-11) works when there are pieces on the right and no pieces on the left.

6. The method for using the intelligent junction box for automobile stamping die identification and control according to claim 4 or 5, characterized in that: The configuration information input by the handheld programmer is connected to the UART interface of the MCU through the RS232 interface chip via the configuration interface. After the communication between the handheld programmer and the MCU is established, the MCU receives the configuration instructions and parses them to obtain parameters such as working mode, press number, and mold number information. This parameter information is displayed on the display unit and stored in the cache area of ​​the MCU.

7. The method for using the intelligent junction box for automobile stamping die identification and control according to claim 6 is characterized in that: The signal detection input interface inputs the sensor signal to the isolation circuit. The shift register converts the parallel signal output by the isolation circuit into a serial signal and transmits it to the MCU through the SPI1 communication interface. The sensor input signal received by the MCU is processed and logically operated with the configuration parameters of the handheld programmer obtained by the MCU analysis to analyze whether the incoming materials are in place. After the incoming materials are in place, the MCU outputs a 10-bit binary mold number control signal, a 3-bit binary press number control signal, and a 4-bit binary working mode control signal according to the set working mode. The MCU outputs the control signal into the high-side switch through SPI2, and the high-side switch outputs high and low levels on the heavy-load wire core corresponding to the heavy-load output interface.

8. The method for using the intelligent junction box for automobile stamping die identification and control according to claim 4 or 7, characterized in that: The PLC detects the high and low level signals of the heavy-load core to identify the press number, mold number and working mode information, and controls the operation of the corresponding press; the output signal current of the heavy-load core can reach 0.5A.

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