This paper introduces the application of Siemens S7-1500PLC in the total control system of painting robot and suspension running mechanism. From the aspect of software and hardware design, combined with on-site debugging examples, the successful implementation of key functions is described.
I. Project introduction
In recent years, robotic automatic spraying system has been widely used in automotive and other industrial fields due to its many advantages such as high repeatability, good coating quality, good reliability, strong applicability and high efficiency. At present, the manufacturing process of aviation products is still labor intensive, complicated in process, poor working conditions, supplemented by a large number of fixtures and manual manufacturing, and insufficient automation capacity. Under the background of the 13th Five-Year Plan and the development of Intelligent Manufacturing 2025, AVIC Composites Manufacturing Institute has taken the lead in the field of spraying, using robots for automated production, accelerating the transformation and upgrading of production mode and improving the advanced manufacturing of equipment. ability.
This project adopts a movable suspended spray 6-axis robot, which is installed on a 3 degree-of-freedom rectangular coordinate displacement crane, which can be in the scope of the spray booth (size in the spray booth: L30m×W9m×6.5m) A plurality of degrees of freedom, such as front, back, left and right, up and down, and rotation, are provided with a spray gun on the arm of the robot to enable spraying of the outer surface of the large composite workpiece.
Second, the hanging robot spraying system composition
The hanging robot spraying system consists of the total control system, the crane system (suspension running mechanism), the robot system, the intelligent paint supply system and the video monitoring system. The system network diagram is shown in Figure 1:
Figure 1 Network diagram of robot spraying system
The crane system consists of: 1 set of longitudinal travel mechanism (X-axis), 1 set of traverse mechanism (Y-axis), 1 set of lifting mechanism (Z-axis) and electric servo drive system, as well as extensions for maintenance and inspection. facility. as shown in picture 2:
Figure 2 crane and robot device diagram
The intelligent paint supply system consists of a siphon, diaphragm pump, material tank, filter, 2KS, pressure regulator, air protector, etc., which is a complete set of paint supply system. It is an important part of the spray system, and it is responsible for the supply of raw materials. The important role of adjusting the premix ratio to raw materials is a necessary prerequisite for the actuator. The material contains paint, curing agent and cleaning agent.
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