Diverter welding circuit system

Abstract

The utility model discloses a shunt welding circuit system, which comprises a three-phase power supply, a turntable motor control loop, a conveying motor control loop and a sequence control loop, the sequential control loop comprises a turntable driving control unit, a laser welding control unit and a conveying driving control unit; the turntable driving control unit is used for controlling the turntable to rotate, so that the plurality of fixing columns sequentially reach a laser welding position; the laser welding control unit is used for controlling a laser beam to conduct surrounding welding on the fixing column and the flow divider base. The conveying drive control unit is used for controlling the diverter base to move, so that the next fixing column reaches the laser welding position. Compared with the prior art, the shunt welding circuit system has the advantages that the shunt welding circuit system can automatically control the working processes such as rotation of the rotary table, laser welding and movement of the shunt base, the consistency and reliability of the shunt welding process are guaranteed, meanwhile, the production efficiency is improved, and the manual operation intensity is reduced.

Description

Technical Field

[0001] The utility model relates to a manufacturing system of electrical measuring devices, in particular to a shunt welding circuit system, which is applied to the production process of shunts in the fields of industrial automation and power measurement. Background Art

[0002] A shunt is a precision current measuring element, which is widely used in industrial automation, power distribution and measurement systems. The production quality of the shunt directly affects its measurement accuracy and service life, and the welding of the fixing column and the shunt base is a key process in the production of the shunt. Traditional shunt welding technologies mostly adopt manual or semi-automatic operation modes. Operators need to manually control processes such as the rotation of the turntable, the start and stop of the laser welding equipment, and the movement of the conveying mechanism. This not only has low work efficiency, but also causes unstable product quality due to human factors.

[0003] The existing shunt welding systems have the following problems: First, the operation process depends on manual control, and it is impossible to ensure that the welding time and laser power of each welding point are exactly the same, resulting in large differences between product batches; Second, it is difficult to ensure the accuracy of manually adjusting the position of the fixing column, which affects the welding quality; Third, it is difficult to achieve circumferential welding with traditional welding methods, and the welding strength and uniformity are insufficient; Fourth, manual operation requires workers to repeat monotonous operations for a long time, which is easy to cause fatigue and increase the risk of operation errors. In addition, traditional welding methods are difficult to meet the requirements of mass production, and the production efficiency is low.

[0004] Therefore, it has important practical value to develop a shunt welding circuit system that can automatically control the whole process of turntable rotation, laser welding and conveying mechanism movement, ensure the consistency of product welding quality, improve production efficiency and have perfect protection functions. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a shunt welding circuit system, which can automatically control the working processes such as turntable rotation, laser welding and shunt base movement, ensure the consistency and reliability of the shunt welding process, improve the production efficiency at the same time, and reduce the manual operation intensity.

[0006] The above technical purpose of the utility model is achieved through the following technical solutions:

[0007] A shunt welding circuit system, comprising: three-phase power supplies L1, L2, L3 and a neutral line N, and the three-phase power supplies are connected to the system through a main circuit breaker QF; the system includes: a turntable motor control circuit, a conveying motor control circuit and a sequence control circuit; wherein, the turntable motor control circuit includes a contactor KM1, a thermal relay FR1 and a turntable motor M1; the conveying motor control circuit includes a contactor KM2, a thermal relay FR2 and a conveying motor M2; the sequence control circuit includes a turntable drive control unit, a laser welding control unit and a conveying drive control unit; the turntable drive control unit is used to control the rotation of the turntable so that a plurality of fixed columns sequentially reach the laser welding position; the laser welding control unit is used to control the laser beam to perform circumferential welding on the fixed columns and the shunt base; the conveying drive control unit is used to control the movement of the shunt base so that the next fixed column reaches the laser welding position.

[0008] The present utility model is further configured as: the turntable drive control unit includes: a push-button switch SB1, a normally open auxiliary contact of the thermal relay FR1, a time relay KT1 and a contactor KM1; the push-button switch SB1 is connected in series with the auxiliary contact of the thermal relay FR1 and then connected to the coil circuit of the time relay KT1; the normally closed contact 7-8 of the time relay KT1 is connected in series with the coil circuit of the contactor KM1 and is used to control the rotation of the turntable motor M1 to drive the turntable on which the shunt base is placed to rotate.

[0009] The present utility model is further configured as: the laser welding control unit includes: a time relay KT1 and a laser LASER; the normally closed contact 3-4 of the time relay KT1 is connected in series with the control circuit of the laser LASER; the laser control circuit is used to start the laser beam to perform circumferential welding on the fixed columns and the shunt base.

[0010] The present utility model is further configured as: the conveying drive control unit includes: a time relay KT1, a normally open auxiliary contact of the thermal relay FR2, a time relay KT2 and a contactor KM2; the normally open contact 5-6 of the time relay KT1 is connected in series with the auxiliary contact of the thermal relay FR2 and then connected to the coil circuit of the time relay KT2; the normally closed contact 11-12 of the time relay KT2 is connected in series with the coil circuit of the contactor KM2 and is used to control the operation of the conveying motor M2 to push the shunt base to move through a cylinder.

[0011] The present utility model is further configured as: the system further includes a safety protection device, and the safety protection device includes a thermal relay FR1 and a thermal relay FR2, which are respectively used to monitor the working current of the turntable motor and the conveying motor and cut off the power supply in case of overload to protect the motor from damage.

[0012] The present utility model is further configured such that: the time relay KT1 is an electrified delay type relay, which is used to control the working time of the turntable motor M1 to ensure that the turntable stops automatically after rotating three weeks.

[0013] The present utility model is further configured such that: the time relay KT1 is an electrified delay type relay, which is used to control the working time of the laser to ensure that it stops automatically after welding is completed.

[0014] The present utility model is further configured such that: the time relay KT2 is an electrified delay type relay, which is used to control the working time of the conveying motor M2 to ensure that the shunt base stops automatically after moving an appropriate distance.

[0015] In summary, the present utility model has the following beneficial effects:

[0016] 1. Automatic control: The system realizes the full-automatic control of the turntable rotation, laser welding and shunt base movement through the sequential control loop. The operator only needs to press the start button SB1 to complete a complete working cycle, which greatly reduces the manual operation intensity and improves the work efficiency. There is no need for manual intervention during the welding process, reducing the risk of operation errors and improving the production safety.

[0017] 2. High product consistency: The system uses time relays to precisely control the turntable rotation and laser welding time to ensure that the time of each welding cycle is consistent, guaranteeing the uniformity of the welding quality and improving the consistency and stability of the product quality. Compared with manual control, the automatic control system can control the product welding quality within a smaller error range.

[0018] 3. Surrounding welding technology: The system realizes the surrounding welding of the fixed column and the shunt base by precisely controlling the turntable to rotate three weeks and the laser welding timing sequence, greatly improving the welding strength and uniformity, while reducing product defects caused by local poor welding and improving the service life and reliability of the product.

[0019] 4. Perfect safety protection: The system uses thermal relays FR1 and FR2 to provide overload protection for the motors. When the motors are overloaded, the power supply can be cut off in time to prevent the motors from burning out. At the same time, the motor shell is grounded through the PE terminal to prevent electric shock danger and improve the operation safety of the equipment. The precise control of the time relay also avoids the problem of excessive laser welding caused by operation errors and protects the safety of the equipment and products.

[0020] 5. Simple and reliable structure: The system adopts a relay logic control structure, without a complex programming controller. It realizes the automatic control function through the conversion of contact states and the time delay of the time relay. The structure is simple, the failure rate is low, and the maintenance is convenient, which is especially suitable for small and medium-sized production enterprises.

[0021] 6. Significantly improved efficiency: Compared with traditional manual or semi-automatic welding, this system can achieve continuous automated welding, greatly improving production efficiency. Through optimized timing control, the waiting time for process switching is reduced, enabling fast and efficient production during the shunt welding process. Description of the Drawings

[0022] Figure 1 This is the circuit schematic diagram of the shunt welding circuit system of the present utility model. Detailed Embodiment

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts belong to the scope of protection of the present utility model.

[0024] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms center, longitudinal, transverse, length, width, thickness, upper, lower, front, rear, left, right, vertical, horizontal, top, bottom, inner, outer, clockwise, counterclockwise, etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

[0025] As Figure 1 shown, the shunt welding circuit system provided by the present utility model includes three-phase power supplies L1, L2, L3 and a neutral line N, which are connected to the system through a main circuit breaker QF. The system mainly consists of three parts: a turntable motor control circuit, a conveyor motor control circuit, and a sequence control circuit.

[0026] The turntable motor control circuit includes a contactor KM1, a thermal relay FR1, and a turntable motor M1. The turntable motor M1 is a three-phase asynchronous motor and is connected to the three-phase power supply through the main contacts of the contactor KM1. The thermal relay FR1 is connected in series with the turntable motor to monitor the working current of the motor and automatically disconnect the circuit when the motor is overloaded to protect the motor from damage. The outer shell of the turntable motor is grounded through the PE terminal to ensure the safe operation of the equipment. The main function of the turntable motor M1 is to drive the turntable on which the shunt base is placed to rotate, so that the fixing posts on the shunt base reach the laser welding position in sequence. Threaded fixing posts are placed in each hole position on the shunt base.

[0027] The conveyor motor control circuit includes contactor KM2, thermal relay FR2, and conveyor motor M2. The conveyor motor M2 is also a three-phase asynchronous motor and is connected to the three-phase power supply through the main contacts of contactor KM2. The thermal relay FR2 is connected in series with the conveyor motor for overload protection. The outer shell of the conveyor motor is also grounded through the PE terminal to ensure equipment safety. The main function of the conveyor motor M2 is to drive the pump to inflate the cylinder to push the turntable integral mechanism to move, so that the next fixed column reaches the laser welding position.

[0028] The sequential control circuit consists of a turntable drive control unit, a laser welding control unit, and a conveyor drive control unit. The control units are interconnected through the contacts of time relays KT1 and KT2 to form a sequential control chain, enabling each process to proceed in a predetermined order.

[0029] The turntable drive control unit includes push-button switch SB1, normally open auxiliary contact of thermal relay FR1, time relay KT1, and contactor KM1. The operator presses the push-button switch SB1 to start the system. If the thermal relay FR1 has not tripped (indicating that the turntable motor is in normal condition), the coil of the time relay KT1 is energized. The normally closed contacts 7-8 of the time relay KT1 are in the closed state, the coil of the contactor KM1 is energized, the main contacts of the contactor KM1 are closed, and the turntable motor M1 starts to work, driving the turntable with the diverter base to rotate. The power-on delay setting of the time relay KT1 causes the turntable to stop automatically after rotating three weeks.

[0030] The laser welding control unit includes laser LASER. When the turntable starts to rotate, the normally closed contacts 3-4 of the time relay KT1 are in the closed state, and the laser starts to work to perform circumferential welding on the gap between the fixed column and the diverter base. The power-on delay setting of the time relay KT2 causes the laser output to stop automatically after welding is completed.

[0031] The conveying drive control unit includes a time relay KT2, normally open auxiliary contacts of a thermal relay FR2, normally open contacts 5-6 of a time relay KT1, and a contactor KM2. When the welding is completed, the normally closed contacts 3-4 and 7-8 of the time relay KT1 are disconnected, the laser stops working and the turntable no longer rotates. At the same time, the normally open contacts 5-6 are closed. If the thermal relay FR2 does not act (indicating that the conveying motor is in a normal state), the coil of the time relay KT1 is energized. The normally closed contacts 11-12 of the time relay KT2 are in a closed state, the coil of the contactor KM2 is energized, the main contacts of the contactor KM2 are closed, and the conveying motor M2 starts to work. The diverter base is pushed to move by the air cylinder, so that the next fixing post reaches the center of the turntable and corresponds to the laser welding position of the laser. The power-on delay setting of the time relay KT1 makes the overall mechanism of the turntable stop automatically after moving an appropriate distance (the distance between two fixing posts). At this time, the normally closed contacts 1-2 and 11-12 are disconnected, the air cylinder stops pushing, and due to the power-off of the turntable drive control unit, the time relay KT1 loses power and the circuit is reset, repeating the above steps.

[0032] The working process of the system is as follows:

[0033] 1. Preparation stage: The operator places multiple diverter bases with fixing posts on the turntable, then turns on the power supply and closes the main circuit breaker QF.

[0034] 2. Startup stage: The operator presses the start button SB1, and the coil of the time relay KT1 is energized.

[0035] 3. Turntable rotation stage: The normally closed contacts 7-8 of the time relay KT1 are in a closed state, the coil of the contactor KM1 is energized, and the turntable motor M1 starts to work, driving the turntable with the diverter base with the fixing post in a virtual connection to rotate.

[0036] 4. Laser welding stage: At the same time, the normally closed contacts 3-4 of the time relay KT1 are in a closed state, and the laser starts to work to perform circumferential welding on the fixing post and the diverter base.

[0037] 5. Welding completion stage: After the welding is completed, the timing of the time relay KT1 ends, and the normally closed contacts 7-8 and 3-4 are disconnected, and the laser and the turntable stop working.

[0038] 6. Diverter base movement stage: At the same time, the normally open contacts 5-6 of the time relay KT1 are closed, and the coil of the time relay KT1 is energized. The normally closed contacts 11-12 of the time relay KT2 are in a closed state, the coil of the contactor KM2 is energized, and the conveying motor M2 starts to work. The diverter base is pushed to move by the air cylinder, so that the next fixing post reaches the laser welding position.

[0039] 7. Circulating working stage: After the overall turntable mechanism moves into place, the system repeats the processes of turntable rotation, laser welding, and turntable movement described above until all the fixing posts on the diverter base are welded.

[0040] 8. Protective shutdown stage: In any working stage, if the motor is overloaded, the thermal relay FR1 or FR2 operates, its auxiliary contacts disconnect, cutting off the control circuit of the corresponding motor to protect the safety of the motor.

[0041] 9. Normal shutdown stage: After all welding work is completed, the operator can disconnect the main circuit breaker QF to stop the system.

[0042] The delay parameter of the time relay can be finely adjusted by turning the knob on the relay to adapt to the welding requirements of different specifications of diverters, making the welding effect optimal.

[0043] The diverter welding circuit system of the present utility model adopts a relay logic control structure, does not rely on a complex programming controller, and realizes the automatic control function through the conversion of contact states and the delay of the time relay. It has the characteristics of simple structure, low failure rate, and easy maintenance, and is especially suitable for small and medium-sized production enterprises. Compared with traditional manual or semi-automatic welding methods, the present utility model has the following advantages: high degree of automation, realizing the full-automatic control of turntable rotation, laser welding, and turntable movement, and improving production efficiency.

[0044] The present utility model can be applied to the welding processing of various specifications of diverters. By adjusting the delay parameter of the time relay, it can flexibly adapt to the welding requirements of different specifications of diverters.

[0045] In addition, during the welding process of each fixing post, an additional cylinder can be added to position the fixing post to prevent the position of the fixing post from shifting during the welding process.

[0046] The above is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present utility model should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claims.

Claims

1. A shunt welding circuit system, characterized in that: include: Three-phase power supply L1, L2, L3 and neutral line N, the three-phase power supply is connected to the system through the main circuit breaker QF; the system includes: a turntable motor control circuit, a conveying motor control circuit and a sequential control circuit; wherein the turntable motor control circuit includes a contactor KM1, a thermal relay FR1 and a turntable motor M1; the conveying motor control circuit includes a contactor KM2, a thermal relay FR2 and a conveying motor M2; the sequential control circuit includes a turntable drive control unit, a laser welding control unit and a conveying drive control unit; the turntable drive control unit is used to control the rotation of the turntable so that multiple fixed columns reach the laser welding position in sequence; the laser welding control unit is used to control the laser beam to perform circumferential welding on the fixed column and the diverter base; the conveying drive control unit is used to control the movement of the diverter base so that the next fixed column reaches the laser welding position.

2. The shunt welding circuit system according to claim 1, characterized in that: The turntable drive control unit includes: a push button switch SB1, a normally open auxiliary contact of a thermal relay FR1, a time relay KT1 and a contactor KM1; the push button switch SB1 is connected in series with the auxiliary contact of the thermal relay FR1 and then connected to the coil circuit of the time relay KT1; the normally closed contacts 7-8 of the time relay KT1 are connected in series with the coil circuit of the contactor KM1, which is used to control the rotation of the turntable motor M1, thereby driving the turntable on which the diverter base is placed to rotate.

3. The shunt welding circuit system according to claim 1, characterized in that: The laser welding control unit comprises: a time relay KT1 and a laser LASER; the normally closed contacts 3-4 of the time relay KT1 are connected in series with the control circuit of the laser LASER; the laser control circuit is used to start the laser beam to perform circumferential welding on the fixed column and the diverter base.

4. The shunt welding circuit system according to claim 1, characterized in that: The conveying drive control unit includes: a time relay KT1, a normally open auxiliary contact of a thermal relay FR2, a time relay KT2 and a contactor KM2; the normally open contacts 5-6 of the time relay KT1 are connected in series with the auxiliary contacts of the thermal relay FR2 and then connected to the coil circuit of the time relay KT2; the normally closed contacts 11-12 of the time relay KT2 are connected in series with the coil circuit of the contactor KM2, which are used to control the operation of the conveying motor M2 and push the diverter base to move through the cylinder.

5. The shunt welding circuit system according to claim 1, characterized in that: The system also includes a safety protection device, which includes a thermal relay FR1 and a thermal relay FR2, which are respectively used to monitor the operating current of the turntable motor and the conveying motor and cut off the power supply in the event of an overload to protect the motor from damage.

6. The shunt welding circuit system according to claim 2, characterized in that: The time relay KT1 is a power-on delay type relay, which is used to control the working time of the turntable motor M1 to ensure that the turntable stops automatically after rotating for three circles.

7. The shunt welding circuit system according to claim 3, characterized in that: The time relay KT1 is a power-on delay type relay used to control the working time of the laser to ensure that it automatically stops after welding is completed.

8. The shunt welding circuit system according to claim 4, characterized in that: The time relay KT2 is a power-on delay type relay, which is used to control the working time of the conveying motor M2 to ensure that the diverter base stops automatically after moving an appropriate distance.

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