Automobile switch panel hot riveting controller

Abstract

The utility model discloses a hot riveting controller for an automobile switch panel. The hot riveting controller comprises a transformer, a riveting heating piece, a power supply module, a micro-control unit, a relay, a pulse regulation and control piece and a temperature acquisition piece. The utility model has the following advantages and effects: the current temperature value is collected and fed back to the micro-control unit through the temperature collecting piece arranged on the riveting heating piece, the micro-control unit outputs a pulse control signal based on the fed-back temperature value and in combination with a PID (Proportion Integration Differentiation) control algorithm, and the pulse control signal is a low-voltage pulse current with an adjustable output duty ratio; the temperature rising time, the temperature rising speed and the temperature maintaining time of the riveting heating piece are accurately controlled, when the riveting heating piece reaches the set time, the micro-control unit outputs an air blowing signal, rapid cooling is achieved by controlling the air blowing time of the electromagnetic valve, and demolding is completed. The heating temperature, the heating time, the temperature holding time, the blowing cooling time and the demolding time are accurately controlled step by step, and the demolding quality is improved while the energy consumption is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of automobile accessory production, especially a kind of automobile switch panel hot riveting controller. BACKGROUND

[0002] In prior art, multiple temperature controllers are used to control heating tube partition heating, and heat is conducted to overall riveting tool, and the heat is conducted to plastic by overall riveting tool upper die.In the temperature controller control mode, it is impossible to realize step-by-step accurate control of heating temperature, heating time, temperature holding time, air blowing cooling and demolding time, and only long-time constant heating function can be realized, because plastic is demolded without cooling, which leads to frequent phenomena of riveting of product plastic parts not in place, wire drawing and the like;At the same time, long-time heating can lead to high equipment energy consumption. CONTENT OF UTILITY MODEL

[0003] The utility model aims at providing a kind of automobile switch panel hot riveting controller to solve the problems raised in the background art.

[0004] The above technical purpose of the utility model is realized by the following technical scheme:

[0005] A kind of automobile switch panel hot riveting controller, including transformer, riveting heating piece, power module, micro control unit, relay, pulse control and temperature acquisition piece;

[0006] The primary circuit of the transformer is connected to AC mains, and the secondary circuit of the transformer is connected to the riveting heating piece;The power module is connected to AC mains and can rectify and step-down AC mains to form multiple output sources with different voltages, one of which is used to power the power supply pins of the micro control unit and the relay, one of the enable pins of the micro control unit is connected to the input pin of the relay as the riveting enable control pin, and is used to drive the relay to act, and the output end of the relay is connected to the primary circuit of the transformer;

[0007] The pulse control is connected to the primary circuit of the transformer, and one of the enable pins of the micro control unit is connected to the pulse control as the riveting pulse control pin;The temperature acquisition piece is connected to the riveting heating piece, one of the pins of the micro control unit is connected to the temperature acquisition piece as the riveting temperature sampling pin, the temperature acquisition piece collects temperature value and feeds back to the micro control unit, the micro control unit applies frequency and duty cycle adjustable pulse control signal to the pulse control based on the feedback temperature value, to realize adjustable power output.

[0008] Further arrangement is that the transformer secondary circuit is connected with output current detection member and output voltage detection member capable of detecting output current and output voltage of the circuit respectively, and two enable pins of the micro control unit are respectively used as riveting current sensing pin and riveting voltage sensing pin to connect with the output current detection member and the output voltage detection member.

[0009] Further arrangement is that the riveting heating member is single or multiple riveting heating heads connected in series.

[0010] Further arrangement is that the pulse control member is silicon controlled rectifier.

[0011] Further arrangement is that an isolation amplifier module is connected between the temperature acquisition member and the riveting temperature sampling pin, and the power module has an output source for supplying power to the isolation amplifier module.

[0012] Further arrangement is that the temperature acquisition member is thermocouple.

[0013] Further arrangement is that the output current detection member and the output voltage detection member are current transformer and voltage transformer respectively.

[0014] Further arrangement is that two first internal communication interfaces are connected to the micro control unit, one of the first internal communication interfaces is connected with the man-machine interaction module to form communication, and the other first internal communication interface is connected with the first external communication interface.

[0015] Further arrangement is that a second internal communication interface is connected to the micro control unit, the other end of the second internal communication interface is connected with the second external communication interface, and the second external communication interface is connected with the third party equipment to form communication.

[0016] The utility model has the following beneficial effects:

[0017] The temperature acquisition member installed on the riveting heating member collects current temperature value and feeds back to the micro control unit, the micro control unit outputs pulse control signal based on the feedback temperature value and combines PID control algorithm, the pulse control signal is low-voltage pulse current with adjustable output duty ratio, and then the temperature rising time, temperature rising speed and temperature maintaining time of the riveting heating member are accurately controlled, when the riveting heating member reaches the set time, the micro control unit outputs blowing signal, the blowing time of the electromagnetic valve is controlled to achieve rapid cooling, and demolding is completed. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is electrical schematic diagram of example.

[0019] Figure 2 Circuit diagram of the isolated amplifier module in the embodiment.

[0020] In the figure: 11, transformer; 12, riveting heating piece; 13, power module; 14, micro control unit; 15, relay; 16, pulse control; 17, temperature acquisition piece; 21, riveting enable control pin; 22, riveting pulse control pin; 23, riveting temperature sampling pin; 31, output current detection piece; 32, output voltage detection piece; 41, riveting current sensing pin; 42, riveting voltage sensing pin; 51, isolated amplifier module; 61, first external communication interface; 62, HMI touch screen; 71, second external communication interface. DETAILED DESCRIPTION

[0021] The utility model will be further explained in detail in connection with the drawings.

[0022] As shown in the accompanying Figure 1 ;

[0023] The embodiment discloses a car switch panel hot riveting controller, including transformer 11, riveting heating piece 12, power module 13, micro control unit 14, relay 15, pulse control 16 and temperature acquisition piece 17;

[0024] The primary circuit of transformer 11 is connected with AC mains, and the secondary circuit of transformer 11 is connected with riveting heating piece 12; power module 13 is connected with AC mains and can rectify and step-down AC mains to form multiple output sources with different voltages, one of which is used to supply power to the power pin of micro control unit 14 and relay 15, one of the enable pins of micro control unit 14 is connected with the input pin of relay 15 as riveting enable control pin 21, and is used to drive relay 15 to act, and the output end of relay 15 is connected with the primary circuit of transformer 11;

[0025] Pulse control 16 is connected with the primary circuit of transformer 11, and one of the enable pins of micro control unit 14 is connected with pulse control 16 as riveting pulse control pin 22; temperature acquisition piece 17 is connected with riveting heating piece 12, and one of the enable pins of micro control unit 14 is connected with temperature acquisition piece 17 as riveting temperature sampling pin 23, temperature acquisition piece 17 collects temperature values and feeds back to micro control unit 14, micro control unit 14 applies frequency and duty cycle adjustable pulse control signal to pulse control 16 based on the feedback temperature values, and realizes adjustable power output.

[0026] The output current detection member 31 and the output voltage detection member 32 are connected to the secondary circuit of the transformer 11, and the two enable pins of the micro control unit 14 are connected to the riveting current sensing pin 41 and the riveting voltage sensing pin 42 respectively.

[0027] The riveting heating member is a single riveting heating head or a plurality of riveting heating heads connected in series, and the maximum number of riveting heating heads connected in series is four.

[0028] The pulse control member 16 is a silicon controlled rectifier.

[0029] The temperature acquisition member 17 and the riveting temperature sampling pin 23 are connected to the isolation amplifier module 51, and the power supply module 13 has an output source for supplying power to the isolation amplifier module 51.

[0030] The temperature acquisition member 17 is a thermocouple.

[0031] More specifically, the thermocouple is a K-type thermocouple.

[0032] The output current detection member 31 and the output voltage detection member 32 are a current transformer and a voltage transformer respectively.

[0033] The micro control unit is connected to two first internal communication interfaces, one of which is connected to the human-computer interaction module for communication, and the other is connected to the first external communication interface.

[0034] More specifically, the first external communication interface 61 is an external RS232 communication interface, the first internal communication interface is an internal RS232 communication interface, and the human-computer interaction module is an HMI touch screen 62.

[0035] The micro control unit is connected to a second internal communication interface, and the other end of the second internal communication interface is connected to a second external communication interface, and the second external communication interface is used to communicate with a third party device.

[0036] More specifically, the second internal communication interface is an internal RS485 / 422 communication interface, and the second external communication interface 71 is an external RS485 / 422 communication interface.

[0037] It should be noted that:

[0038] 1. The transformer 11 converts the input voltage of 220V into an output voltage below 10V, and the selection of the power of the transformer 11 is defined according to the heating power of the riveting heating head, which is generally between 500W and 1200W.

[0039] 2. The thyristor receives a pulse control signal with adjustable frequency and duty cycle from the microcontroller unit 14, and converts the 220V sinusoidal signal of the primary winding of the transformer 11 into an AC pulse signal.

[0040] 3. The voltage transformer monitors the output voltage of the secondary circuit of transformer 11 in real time. Under operating conditions, if no voltage pulse is fed back to the riveting voltage sensing pin 42 of the microcontroller 14, it indicates that a short circuit has occurred in the secondary circuit of transformer 11, triggering the riveting short circuit alarm of the microcontroller 14.

[0041] 4. The current transformer detects the output current of the secondary circuit of transformer 11 in real time and converts it into voltage pulses. Under operating conditions, if no voltage pulse is fed back to the riveting current sensing pin 41 of the microcontroller 14, it means that the secondary circuit of transformer 11 is open, triggering the riveting open circuit alarm of the microcontroller 14.

[0042] 5. The isolation amplifier module 51 acquires the micro-current signal of the K-type thermocouple in real time, amplifies it with high precision, converts it into a voltage signal and feeds it back to the microcontroller unit 14; when the microcontroller unit 14 starts heating, if the temperature signal of the riveting heating head does not change, the microcontroller unit 14 is triggered to alarm for abnormal temperature.

[0043] 6. The power supply module 13 first converts the 220V AC mains power to 24V through a switching power supply, and then converts it to 12V and 5V through two LDOs respectively. The 5V powers the microcontroller unit 14 and the relay 15, and the 12V powers the isolation amplifier module 51.

[0044] 7. The HMI touch screen 62 communicates with the microcontroller unit 14 in real time via RS232, and displays the working status and signals of the microcontroller unit 14 in real time, including external IO status, equipment start-up, heating status, air blowing, cooling status, ready status, temperature change curves of riveting head heating and air blowing cooling, equipment alarm status, etc. It also provides an equipment parameter setting interface, including temperature rise control curve PID parameters, air blowing cooling time, multi-recipe configuration file settings, etc.

[0045] 8. The second external communication interface 71 communicates with third-party devices, supports third-party devices to switch recipes for this controller, facilitates the production of multiple products on the same equipment, and can perform start-up control, emergency stop control, etc. When a fault occurs, it can provide alarm codes to third-party devices in real time.

[0046] 9. The external I / O input / output module is an isolated I / O interaction module, which facilitates third-party devices without bus communication to perform recipe switching, start-up control, and controller emergency stop control on this device, and to receive the controller's busy signal and alarm signal.

[0047] In this embodiment, the circuit diagram of the isolation amplifier module is attached. Figure 2shown;

[0048] The circuit is used K-type thermocouple as temperature sampling medium, connecting K-type thermocouple special amplifier integrated circuit AD8495, again through isolation amplifier integrated circuit ISO124 isolation amplification after input MCU again;R114 is as a thermocouple disconnect detection resistance, R107 / C39 and R111 / C43 filter common mode interference filtering effect, C40 filter differential mode interference filtering effect;C37 and C47 filter positive and negative power supply interference effect. Because the signal of K-type thermocouple is small, so the output signal of AD8495 again through IOS124 isolation amplification, wherein L6 filter common ground interference effect of both sides of GND1 and GND01, C38 and C46 are used to filter the interference of the positive and negative power supply after the isolation of the isolation amplifier integrated, wherein C41 and C42 are used to filter the output signal of the thermocouple, to prevent interference pulse into the sampling display MCU, wherein DZ5 is used to limit the output voltage, to prevent high voltage into MCU, because the power supply of MCU and ADC sampling power is 3.3V voltage, if high voltage enters, MCU will be damaged, so 6.2V voltage stabilizing tube is used for voltage stabilization, so that even if there is high voltage input will be limited to 6.2V, again through R110 and R113 voltage division, the output is 3.1V. R109 is used to protect the isolation amplifier integrated ISO124, when the thermocouple amplifier integrated AD8495 input abnormal voltage, the output voltage can be limited to 6.2v and prevent isolation amplifier integrated ISO124 overcurrent damage.

[0049] The specific embodiment is only an explanation of the utility model, and it is not a limitation of the utility model. Those skilled in the art can make modifications without creative contribution after reading the specification. However, as long as it is within the scope of the claims of the utility model, it is protected by the patent law.

Claims

1. An automotive switch panel heat stake controller, characterized by: The transformer (11), riveting heating element (12), power module (13), micro control unit (14), relay (15), pulse control (16) and temperature acquisition element (17) are included. The primary circuit of the transformer (11) is connected with AC power supply, and the secondary circuit of the transformer (11) is connected with the riveting heating element (12); the power module (13) is connected with AC power supply and can rectify and step-down AC power supply to form multiple output sources with different voltages, one of which is used to supply power to the power pin of the micro control unit (14) and the relay (15); one of the enable pins of the micro control unit (14) is connected with the input pin of the relay (15) as the riveting enable control pin (21) and is used to drive the relay (15) to act; the output end of the relay (15) is connected with the primary circuit of the transformer (11). The pulse control (16) is connected with the primary circuit of the transformer (11), and one of the enable pins of the micro control unit (14) is connected with the pulse control (16) as the riveting pulse control pin (22); the temperature acquisition element (17) is connected with the riveting heating element (12), and one of the pins of the micro control unit (14) is connected with the temperature acquisition element (17) as the riveting temperature sampling pin (23); the temperature acquisition element (17) collects temperature values and feeds back to the micro control unit (14), and the micro control unit (14) applies the pulse control signal with adjustable frequency and duty cycle to the pulse control (16) based on the feedback temperature values, so as to realize adjustable power output.

2. The hot rivet controller for an automotive switch panel of claim 1, wherein: The secondary circuit of the transformer (11) is connected with the output current detection element (31) and the output voltage detection element (32) which can detect the output current and the output voltage of the circuit respectively, and two of the enable pins of the micro control unit (14) are connected with the output current detection element (31) and the output voltage detection element (32) respectively as the riveting current sensing pin (41) and the riveting voltage sensing pin (42).

3. The hot rivet controller for an automotive switch panel of claim 1, wherein: The riveting heating element (12) is a single or multiple riveting heating head in series.

4. The hot rivet controller for an automotive switch panel of claim 1, wherein: The pulse control (16) is a thyristor.

5. The hot rivet controller for an automotive switch panel of claim 1, wherein: An isolation amplifier module (51) is connected between the temperature acquisition element (17) and the riveting temperature sampling pin (23), and one of the output sources of the power module (13) is used to supply power to the isolation amplifier module (51).

6. The hot rivet controller for an automotive switch panel of claim 5, wherein: The temperature acquisition element (17) is a thermocouple.

7. The hot rivet controller for an automotive switch panel of claim 2, wherein: The output current detection element (31) and the output voltage detection element (32) are current transformers and voltage transformers respectively.

8. The hot rivet controller for an automotive switch panel of claim 1, wherein: Two first internal communication interfaces are connected to the micro control unit (14), one of which is connected with the man-machine interaction module for communication, and the other is connected with the first external communication interface (61). The micro control unit (14) is connected with two first internal communication interfaces, one of which is connected with the man-machine interaction module for communication, and the other is connected with the first external communication interface (61).

9. The hot rivet controller for an automotive switch panel of claim 1, wherein: The micro control unit (14) is connected with a second internal communication interface, the other end of the second internal communication interface is connected with a second external communication interface (71), and a third party device is communicated based on the second external communication interface (71).

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