The automotive industry has always been the most important field of robot applications. With the increase in automation demand, the application of industrial robots has been expanded. In addition to traditional welding applications, robots are used for loading and unloading, material handling, palletizing, polishing, spraying, and assembly on machine tools. And other fields have also been widely used. Metal forming machine tools are an important part of machine tools. Forming processing is usually associated with high labor intensity, noise pollution, metal dust, etc. Sometimes in a high temperature, high humidity or even polluted environment, the work is simple and boring, and it is difficult for companies to recruit people. The integration of industrial robots and forming machine tools can not only solve the problem of enterprise employment, but also improve processing efficiency and safety, improve processing accuracy, and has a lot of room for development.

The integrated application of industrial robots and CNC machine tools helps smart factories move from concept to reality

Integrated application of CNC bending machine

There are two main ways for robot bending integration applications. One is centered on the bending machine, the robot is equipped with a vacuum chuck, and the magnet is divided into the loading rack, positioning table, unloading table, and turning rack to form a bending unit. The second is a flexible sheet processing line formed by robots and laser equipment or CNC turntable punch presses, industrial robot walking shafts, sheet metal transfer lines, positioning tables, and vacuum chuck grippers. Estun uses its own technology and platform in the robot control system and the machine tool numerical control system to achieve seamless connection, develops a bending software package, and implements closed-loop control of the robot's feeding during the bending process. Under different bending speeds, the robot realizes automatic matching and complete tracking, and the bending software package also shortens the bending teaching time from 2-3 days in the past to 2-3 hours. It is well used in the processing of switch cabinets, file cabinets, elevators, and anti-theft doors.

Press stamping integrated application

There are two main ways to integrate robots and presses into stamping applications. One is a single robot punching and unloading: the sheet material is moved from the destacking table to the positioning table by the robot, and then transferred to the press mold for punching after positioning. After the punching is completed, the material is picked up by the robot and placed on the stacking table to achieve A single press robot automatically loads and unloads materials. The second is the robot stamping connection: multiple robots establish a stamping connection between multiple presses. According to the requirements of the forming process of the processed workpiece, it needs to be processed by multiple presses. The entire production line is composed of a stacking robot, a feeding robot, a transfer robot between the presses, and a tail line robot. Compared with linear coordinate manipulators, industrial robots are more flexible, have no contour requirements for molds, and are easy to integrate. Estun uses the autonomous press control system and the robot control system to seamlessly connect, so that the robot's action and the press achieve the best coordination, and the use of fieldbus maximizes the efficiency of the entire production line and higher safety

Hot die forging integrated application

The hot die forging production line usually consists of two die forging presses, one for stamping and the other for trimming. The integrated application of hot die forging robot is usually equipped with two robots, one is responsible for transferring the high temperature materials processed by the intermediate frequency furnace to the stamping die forging press, and the other is responsible for taking the material from the stamping die forging press and then transferring it to the other die. The forging press performs edge trimming. In order to prevent the high temperature stamping workpiece from sticking to the mold, it is necessary to lubricate the mold with graphite after each stamping. The lubrication can be done by a robot or a special mechanism can be used. Because forging is a harsh environment with high temperature and humidity and graphite lubrication, special attention should be paid to the protection of the robot and the ability of the robot to resist heat radiation. The 4-5-6 axis motors of Estun’s robots are used in the robot arms and small arms. The joint of the arm has the structural feature of keeping away from heat radiation. The electronic cam control system is installed on the die forging press to coordinate the operation of the die forging press with the robot operation, improve processing efficiency, and enhance the safety of the system.

Welding application

Welding is the subsequent process of sheet metal forming on forming machine tools. Robot welding has two types: resistance welding and arc welding. Welding robot applications account for more than 40% of the entire robot application. The arc welding application is based on the robot as the core, equipped with welding machine, wire feeder, welding gun, tooling fixture, etc. to form a welding workstation. Estun can provide special arc welding robot workstations with 6kg and arm lengths of 1400, 1600 and 2000mm. Resistance welding application is based on the robot as the core, equipped with spot welding gun, welding controller, water and air unit, pipeline package, tooling fixture, etc. to form a spot welding workstation. Estun can provide a dedicated resistance welding robot workstation with 220kg and 2600mm arm length. In addition, Estun Automation has developed a special welding software package for welding applications and integrates the welding expert process parameter library into the robot system to meet various types of needs.

Robots are a typical representative of advanced manufacturing technology and automation equipment. Intelligent industrial equipment has become the basis for the upgrading and transformation of the global manufacturing industry. The integrated application of industrial robots and CNC machine tools makes smart manufacturing, digital workshops, and smart factories move from concept to reality.

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