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Robotic Welding

Robotic Welding Robotic Welding is now used in the automotive industry, the electromechanical industry (including the telecommunications industry), the general machinery industry, the construction industry, metal processing, foundry and other heavy industrial and light industrial sectors. The...

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Robotic Welding

Robotic Welding is now used in the automotive industry, the electromechanical industry (including the telecommunications industry), the general machinery industry, the construction industry, metal processing, foundry and other heavy industrial and light industrial sectors. The industrial application of robots is divided into four areas, namely material processing, parts manufacturing, product inspection and assembly. Among them, material processing is often the easiest. Parts manufacturing includes forging, spot welding, mashing and casting. Inspections include both explicit inspections (inspection of product surface image and geometry, integrity of parts and dimensions during or after processing) and hidden inspections (testing part quality or surface integrity during processing). Assembly is the most complex application area as it may include processes such as material processing, in-line inspection, part supply, matching, dosing and tightening.

The spot welding robot consists of a robot body, a computer control system, a teaching box and a spot welding system. In order to meet the requirements of flexible operation, the welding robot usually uses the basic design of the joint industrial robot, generally having six degrees of freedom. : waist, big arm turn, small arm turn, wrist turn, wrist swing and wrist watch. The driving method is hydraulic drive and electric drive. Among them, the electric drive has the advantages of simple maintenance, low energy consumption, high speed, high precision and good safety, so it is widely used. The spot welding robot performs spot welding operations according to the actions, sequences and parameters specified in the teaching procedure. The process is fully automated and has an interface for communication with external devices, which can accept the upper level master and management computer through this interface. The control commands work.

 

1. Basic functions of spot welding robot

The requirements for spot welding on the robot used are not very high. Because spot welding requires only point control, there is no strict requirement for the movement path of the welding tongs between points. This is also the reason why robots can only be used for spot welding. The spot welding robot not only needs to have sufficient load capacity, but also has a fast speed when moving between points, and the movement should be smooth and the positioning should be accurate to reduce the shift time and improve the work efficiency. How much load capacity a spot welding robot needs depends on the type of welding tongs used. For a welding tong that is separate from the transformer, a robot with a load of 30 to 45 kg is sufficient. However, on the one hand, the welding tongs have large electrical energy loss due to the length of the secondary cable, and are also disadvantageous for the robot to extend the welding tongs into the workpiece. On the other hand, the cable runs without the robot moving, and the cable is damaged quickly. . Therefore, the use of integrated welding tongs is gradually increasing. This welding tongs together with the transformer quality is around 70kg. Considering that the robot has sufficient load capacity, it can send the welding tongs to the space position for welding with a large acceleration. Generally, heavy-duty robots with a load of 100~150kg are selected. In order to meet the requirements of short-distance rapid displacement of welding tongs during continuous spot welding. The new heavy-duty robot adds the ability to perform 50mm displacement in 0.3s. This puts higher demands on the performance of the motor, the operation speed of the microcomputer and the algorithm.

 

Features:

1) Stabilize and improve the quality of welding;

2) Improve labor productivity;

3) Improve the labor intensity of workers and work in harmful environments;

4) Reduce the requirements for workers' operating technology;

5) Shorten the preparation period for product modification and reduce the corresponding equipment investment.

6) Welding robot mainly includes two parts: robot and welding equipment. The robot consists of a robot body and a control cabinet (hardware and software). For welding equipment, for example, arc welding and spot welding are composed of welding power source (including its control system), wire feeder (arc welding), and welding torch (clamp). For intelligent robots, there should also be sensing systems such as laser or camera sensors and their controls.


Type

Heavy-duty

Middle-duty

Light-duty

8*6

5*6 4*5

3.5*5 3*4

2*2

Effective stroke of vertical boom-mm

8000

5000

4000

3500

3000

2000

Effective stroke of cross boom mm

6000

6000

5000

5000

4000

2000

Suitable diameter of cylinder-mm

1000-8000

1000-5000

1000-4000

700-3500

700-3000

500-2000

Rotating angle of the vertical boom

±180°

±180°

±180°

±180°

±180°

±180°(by manual)

Up and down speed of cross boom-m/min

0.9

1

1

1

1

0.3

Expansion speed of cross boom-m/min

0.12-1.2

0.12-1.2

0.12-1.2

0.12-1.2

0.12-1.2

0.12-1.2

Forward and backward speed of the trolley-m/min

1.5

1.5

1.5

1.5

1.5

1.5

The center distance of the trolley track-mm

2308

1780

1780

1780

1500

900

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