CN210731326U

CN210731326U - Welding gun

Info

Publication number: CN210731326U
Application number: CN201921499679.8U
Authority: CN
Inventors: 尤志春; 孙慧博
Original assignee: SHANGHAI GOLDEN DRAGON REFRIGERATION Tech CO Ltd
Current assignee: SHANGHAI GOLDEN DRAGON REFRIGERATION Tech CO Ltd
Priority date: 2019-09-10
Filing date: 2019-09-10
Publication date: 2020-06-12
Anticipated expiration: 2029-09-10

Abstract

The utility model provides a welding gun, including nozzle and circuit unit, its characterized in that, this circuit unit includes: a parameter input unit for inputting welding parameters; the display unit is used for displaying the welding parameters; the communication unit is connected with the welding machine and used for communicating with the welding machine and supplying power to the circuit unit; and the signal processing unit is used for being connected with the parameter input unit, the display unit and the communication unit.

Description

Welding gun

Technical Field

The invention relates to the technical field of electric welding equipment, in particular to a welding gun.

Background

The electric welder is a device which utilizes the high-temperature electric arc generated by the instantaneous short circuit of the positive and negative poles to melt the welding flux and the welded material on the welding rod and combine the contacted object. A welding machine is an indispensable tool in industrial manufacturing, and is mainly used for integrally connecting two separate metal objects by atomic bonding. The general welding machines on the market at present mainly have the following types: (1) from the output type classification: can be divided into a direct current welding machine and an alternating current welding machine; (2) from the use aspect of the welder classification: it can be divided into manual welding, argon arc welding and gas shielded welding. Most of the existing welding machines are direct current welding machines (most adopt a welding mode, and a few welding machines are a combination of two or three types) or alternating current argon arc welding. Along with the development of industry, the traditional welding machine can not meet the market demand, and more demands of users are that one welding machine can realize multiple welding functions, so that different welding demands can be met by switching functions on different welding occasions instead of changing different welding machine types. The welding machine comprehensively considers the factors, adopts an advanced welding power supply technology, combines direct current manual welding, argon arc welding, gas shielded welding and alternating current gas shielded welding into a whole, and can realize switching of various welding modes through switching of a control end, so that intelligent integration of the welding machine is ensured.

The welding gun utilizes the high current of the welding machine, the heat generated by the high voltage is gathered at the welding gun terminal, the welding wire is melted, the melted welding wire permeates to the position needing welding, and the welded objects are firmly connected into a whole after being cooled. The welding gun in the prior art usually cannot be provided with a display screen, and a plurality of connecting wires are needed between the welding gun and the welding machine to respectively supply power to modules such as a control unit and the like and provide communication, so that the structure of the welding gun tends to be complex.

Disclosure of Invention

The invention aims to provide a welding gun, which can display the actual current and voltage of welding in real time during the welding process, adjust all parameters on the welding machine in a non-welding state, switch the welding mode and store and call the welding parameters. The real control of the operation end can be realized. Furthermore, the welding gun communication line is simple, so that the overall design of the welding gun can be simplified.

In order to achieve the above object, the present invention discloses a welding gun including a nozzle and a circuit unit, wherein the circuit unit includes: a parameter input unit for inputting welding parameters; the display unit is used for displaying the welding parameters; the communication unit is connected with the welding machine and used for communicating with the welding machine and supplying power to the circuit unit; and the signal processing unit is used for being connected with the parameter input unit, the display unit and the communication unit.

Further, the communication unit is connected with the welding machine through a first switch wire and a second switch wire, the first switch wire is used for providing communication and power supply for the welding gun and the welding machine, and the second switch wire is grounded.

Further, the parameter input unit includes a key input circuit and a switch circuit.

Furthermore, the communication unit comprises a first signal terminal connected with the first switch wire and a second signal terminal connected with the signal processing unit.

Furthermore, when the first switch line supplies power, the first signal terminal is at a high level.

Furthermore, when the first signal terminal is at a low level, the first switch wire receives a signal sent by the welding machine.

Furthermore, when the second signal terminal sends a signal, the first switch line sends the signal to the welding machine.

Furthermore, the communication unit comprises a voltage stabilizing diode, a resistor and a diode, wherein the anode of the voltage stabilizing diode is grounded, the cathode of the voltage stabilizing diode is connected with the first signal end, the anode of the diode is connected with one end of the resistor, and the other end of the resistor is connected with the second signal end.

Furthermore, the communication unit further comprises a first capacitor, a second capacitor and a third capacitor, wherein one end of the first capacitor is connected with the second signal end and the resistor, the other end of the first capacitor is grounded, one end of the second capacitor is connected with the cathode of the diode, the other end of the second capacitor is grounded, one end of the third capacitor is connected with the cathode of the voltage stabilizing diode, and the other end of the third capacitor is connected with the anode of the voltage stabilizing diode and grounded.

Furthermore, the display unit is a liquid crystal display screen which is also used for displaying the current and/or voltage of the welding.

Compared with the prior art, the welding gun provided by the invention is provided with the parameter input unit and the display unit, so that an operator can observe the numerical value of the input parameter in real time, and the accuracy of the welding process is ensured. The single switch wire for the welding gun provided by the invention realizes the simultaneous power supply for the circuit unit and the communication between the welding gun and the welding machine, and can effectively simplify the structure of the welding gun.

Drawings

FIG. 1 is a functional block diagram of a welding apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic circuit diagram of a parameter input unit of a welding gun according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a circuit configuration of a liquid crystal display of a welding gun according to an embodiment of the invention;

FIG. 4 is a schematic diagram of the electrical configuration of the communication unit of the welding gun according to one embodiment of the present invention;

fig. 5 is a schematic circuit diagram of a signal processing unit of a welding gun according to an embodiment of the invention.

Detailed Description

To make the objects, advantages and features of the present invention more clear, the following describes a welding gun or welding device according to the present invention in detail with reference to fig. 1 to 5. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.

As used in this specification and the appended claims, the singular forms "a", "an", and "the" include plural referents unless the content clearly dictates otherwise. As used in this specification and the appended claims, the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise.

The invention aims to provide a welding gun which is provided with a parameter input unit and a display unit. Furthermore, the welding gun only has two switch wires, wherein one switch wire is used for grounding, and the other switch wire can transmit communication signals and supply power for the display unit.

Fig. 1 is a functional block diagram of a welding apparatus according to an embodiment of the present invention. In a preferred embodiment, as shown in FIG. 1, the torch 1 and the welder 2 are connected by a data line 31. In this embodiment, the data line 31 not only supplies power to the circuit system such as the liquid crystal display on the welding gun, but also can simultaneously transmit clock and data, and the data is bidirectional data, including both the write data from the welding machine to the welding gun and the read data from the welding gun to the welding machine. When the power is normally supplied, the first signal terminal of the communication unit 14 is at a high level, and the data line 31 provides power transmission for the welding gun. After the micro-processing unit of the welding machine 2 sends out the command, the first signal end of the communication unit 14 is a low level signal, and the data line 31 stops transmitting power. After receiving the low level signal, the signal processing unit 12 of the welding gun 1 generates a response signal, and the data line 31 enters a data transmission mode. The parameter input unit 11 can realize setting of a plurality of welding parameters, select the welding parameters through left and right keys, and change the size of the parameters through up and down. The parameter input unit 11 may implement addition and subtraction settings of a plurality of parameters such as wire feed speed and preset voltage. In the communication mode, the numerical value input by the parameter input unit 11 is displayed in the display unit 13; in the power mode line, the display screen can display the current and voltage of the welding in real time.

Fig. 2 is a schematic circuit diagram of a parameter input unit of a welding gun according to an embodiment of the invention. As shown in fig. 2, the parameter input unit 11 includes a key circuit 111 and a switch detection circuit 112. The key circuit 111 is used to set a plurality of welding parameters, and the welding parameters are selected by left and right keys and changed by up and down. The switch detection circuit 112 is used for detecting whether the welding gun is in a working state or not by opening a switch.

Fig. 3 is a schematic circuit diagram of a liquid crystal display screen of the welding gun according to an embodiment of the invention. As shown in fig. 3, the lcd circuit includes a plurality of ports, where CLK is a clock signal, CS is a chip select signal of the lcd, and MOSI is a communication signal between the signal processing unit 12 and the lcd. In the communication mode, the liquid crystal display 13 displays the numerical values input by the parameter input unit 11; in the power mode line, the display screen is used to display the current and voltage of the weld in real time.

Fig. 4 is a schematic circuit diagram of a communication unit of the welding gun according to an embodiment of the invention. The communication unit comprises a voltage stabilizing diode ZD0, a resistor R2 and a diode D0, wherein the anode of the voltage stabilizing diode ZD0 is grounded, the cathode of the voltage stabilizing diode ZD0 is connected with the first Signal end IN, the anode of the diode is connected with one end of the resistor R2, and the other end of the resistor R2 is connected with the second Signal end Signal. The communication unit further comprises a first capacitor C11, a second capacitor C0 and a third capacitor C10, wherein one end of the first capacitor C11 is connected with the second Signal end Signal and the resistor R2, and the other end is grounded. One end of the second capacitor C0 is connected to the cathode of the diode D0, the other end is grounded, one end of the third capacitor C10 is connected to the cathode of the zener diode ZD0, and the other end is connected to the anode of the zener diode ZD0 and grounded.

When the welding machine needs to send a signal to the welding gun, the IN plug is a signal interface connected with the welding machine, the welding gun is a slave machine, the welding gun is IN a standby state at ordinary times and is IN a high level 1, when a starting signal low level 0 sent by a host machine (the welding machine) is received, the microprocessor starts to respond, a signal is output to be the high level 1, the host machine starts to send the following data after receiving a response signal 1 of the welding gun, and a slave machine microprocessor chip detects the signal to complete a display command from the host machine to the slave machine.

When the welding gun needs to send a signal to the welding machine, the host continuously reads a signal on the IN plug IN a timing cycle scanning mode, the signal is normally IN a high point flat 1 mode, when the slave (welding gun) prepares to send a key signal to the host, a signal of a microprocessor signal of the slave sends out 0xAA, and the host receives the key signal sent out by the slave to process after detecting the command.

Fig. 5 is a schematic circuit diagram of a signal processing unit of the welding gun according to an embodiment of the invention. As shown in fig. 5, the signal processing unit 12 is connected to the communication unit 14, the parameter input unit 11, and the display unit 13. The up, down, left and right detection signals are four detection signals of an upper part, a lower part, a left part and a right part on the remote control welding gun respectively, the torch is a detection signal of a gun switch, the signal is a signal communicated with the host, the P2.10 is set as an input port, a starting signal of the host is detected in real time, the P0.0 is set as an output port, and the starting signal and the keying signal are sent out through the port when a response signal and a keying signal are sent out to the host. CLK is a clock signal for the liquid crystal display screen, CS is a chip selection signal for the liquid crystal display screen, MOSI is a communication signal with the display screen, and RES is a setting signal.

The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.

Claims

1. A welding gun comprising a nozzle and a circuit unit, characterized in that the circuit unit comprises: a parameter input unit for inputting welding parameters;

the display unit is used for displaying the welding parameters;

the communication unit is connected with the welding machine and used for communicating with the welding machine and supplying power to the circuit unit;

and the signal processing unit is used for being connected with the parameter input unit, the display unit and the communication unit.

2. The welding gun according to claim 1, wherein the communication unit is connected to the welder by a first switch line for providing communication and power to the welding gun and a second switch line for grounding.

3. The welding gun according to claim 1, wherein the parameter input unit includes a key input circuit and a switch circuit.

4. The welding gun according to claim 2, wherein the communication unit includes a first signal terminal connected to the first switch line, and a second signal terminal connected to the signal processing unit.

5. The welding gun according to claim 4, wherein when the first switch line is powered, the first signal terminal is at a high level.

6. The welding gun according to claim 4, wherein the first switch line receives a signal from the welding machine when the first signal terminal is low.

7. The welding gun according to claim 4, wherein the first switch wire sends a signal to the welding machine when the second signal terminal sends a signal.

8. The welding gun according to claim 4, wherein the communication unit comprises a zener diode, a resistor and a diode, wherein the anode of the zener diode is grounded, the cathode of the zener diode is connected to the first signal terminal, the anode of the diode is connected to one end of the resistor, and the other end of the resistor is connected to the second signal terminal.

9. The welding gun according to claim 8, wherein the communication unit further comprises a first capacitor, a second capacitor and a third capacitor, wherein the first capacitor is connected to the second signal terminal and the resistor at one end and grounded at the other end, the second capacitor is connected to the cathode of the diode at one end and grounded at the other end, and the third capacitor is connected to the cathode of the zener diode at one end and grounded at the anode of the zener diode at the other end.

10. The welding gun according to claim 1, wherein the display unit is a liquid crystal display screen, and the liquid crystal display screen is further used for displaying the current and/or voltage of the welding.