How to choose robot bending unit and flexible bending center?
With the rapid development of sheet metal production in the direction of automation and intelligence, the application of robot bending cells and flexible bending centers is becoming more and more popular, so how should enterprises choose?
First of all, let’s talk about the problems that need to be solved in sheet metal industry bending as follows:
1. Multiple varieties, small batches, and quick switching cannot be realized;
2. The bending precision of high-precision workpieces in the sheet metal industry is low and the quality is unstable;
3. Sheet metal bending operators are scarce, and workers are labor-intensive;
4. Personnel cost, potential safety hazards, process layout, management and operation.
Secondly, it is necessary to figure out how the robot bending unit and the flexible bending center perform sheet metal bending?
1. Robot bending unit
1. Features of the robot bending unit system
Multi-variety production, product switching does not require first piece testing, no programming teaching, and complete product model production switching within 10 minutes.
No need for professional technicians, only operators with strong learning ability and good research skills.
100% guarantee product accuracy.
The components are integrated to ensure the safety and reliability of the system.
The layout is reasonable and the appearance is atmospheric.
2. Technical characteristics of robot bending unit
(1) Design and development
In the design and development of the robot bending unit, the first is to pay attention to the characteristics of users’ individual needs and customization, to take the needs of customers as the main task, and to carry out detailed technical exchanges with customers in the formulation of each technical plan; The provided workpiece processing drawings are analyzed by computer simulation; the third is to conduct on-site proofing tests on the typical workpieces of customers; the fourth is to classify and analyze the customer’s workpieces and data processing.
After confirming that the above-mentioned procedural work is completed, the formulation of the technical scheme will be carried out. After the technical scheme and scheme drawing are approved by the customer, a comprehensive design can be carried out.
(2) Material application
The bending machine frame of the robot bending unit inherits the material characteristics of Italian sheet metal equipment. The material is 45# steel or Q345B (see Figure 7), which has the characteristics of good comprehensive mechanical properties, good rigidity, high strength and good stability. .
(3) Unique rack structure
The traditional bending machine generally adopts a welded frame, including the left and right columns, the lower beam (table), the fuel tank and the supporting square beam using an integral welded structure. The bending machine frame in the robot bending unit does not use a welded frame structure, but adopts a frame riveting technology, and the lower beam (table) and the column are fastened with high-strength steel bolts. The flexible connection fully ensures that the machine body can greatly reduce the stress and deformation of the frame under the condition of high-strength load, and maintain the long-term stability of the machine tool accuracy.
Its structural features:
1) Ensure that the machine has no welding stress deformation.
2) Improve the accuracy of machine assembly.
3) Extend the service life of the machine.
4) The hydraulic compensation accuracy is greatly improved.
(4) Application of sensor technology (precision potentiometer)
In order to ensure high-precision sheet metal bending, sensors are installed on the upper beam (slider) and the lower beam (table) of the bending machine, and the deformation of the upper and lower beams is accurately fed back to the real-time and under working conditions. Numerical control system (PC), after calculation and comparison, the numerical control system outputs the corresponding compensation value to drive the compensation cylinder for dynamic compensation to obtain satisfactory workpiece accuracy.
(5) Compensation technology
No matter what changes occur in the bending conditions such as the thickness, length or bending position of the sheet, it can ensure that the bending angle of each time is completely consistent within the entire length, eliminating the measurement error of the grating ruler and ensuring the accuracy of the machine.
Through closed-loop control, the automatic deflection compensation system simplifies the complex trial bending process under the bending condition of a certain plate thickness. Even if the length of the bending workpiece is different, or in different positions of the bending machine, it can ensure that the bent workpiece has a completely consistent angle and straightness without manual intervention. It can achieve high bending accuracy and stability, and complete real-time dynamic compensation.
(6) Bending follow-up technology
During the bending process, the robot bending unit can automatically follow and adjust according to the running speed of the slider of the bending machine for workpieces of different sizes and plate thicknesses.
(7) Laser angle measurement technology
The laser angle online measurement system, in the automatic bending process of the robot, its automatic application program and the automatic angle measurement of the built-in laser angle measurement device ensure the bending angle accuracy. Its main features are:
1) The bending angle of the workpiece after springback is detected online by laser.
2) The force detection system automatically calculates the amount of bending springback.
3) The depth of the workpiece can be automatically adjusted according to the width of the lower die.
4) Through the closed-loop laser angle online measurement system, the bending yield is guaranteed to reach more than 99.5%.
(8) Robot automatic gripper and mold change technology
Robot automatic gripper and mold change is one of the advanced intelligent automatic operation technologies of bending machine, which consists of automatic mold change software, robot and mold library. When the automatic mold changing system is selected, the precision bending center can automatically and randomly bend small batches of different products. With the automatic die change function, the die in the press brake is no longer a limiting factor, and parts can be handled unattended throughout the process. The gripper of the robotic robot can change molds very quickly, ready to bend the next batch of parts.
(9) Software and Control
Parametric programming, off-line programming and production management software are applied in the robot bending unit. At the same time, the secondary development of bending follow-up, automatic mold change, automatic gripper change, flexible palletizing, real-time compensation, edge finding, Flexible flip technology and bus control technology greatly meet the technical and software needs of various customers for sheet metal bending.
Compared with the traditional bending technology and process, the robot bending unit can double the production efficiency, realize safe and unmanned operation, reduce the original labor by 90%, and help solve the bottleneck problem of sheet metal processing existing by users. It reflects the advantages of intelligent manufacturing in the sheet metal industry.
2. Flexible bending center
1. Features of flexible bending center:
Customizable and flexible
(1) Universal bending tool
Automatic bend length setting system provides high productivity and flexibility levels
(2), auxiliary tools
Auxiliary tool system makes Shengchi bending center a multifunctional bending equipment, which can perform various special bending.
(3) Adaptive automation
The modular design allows the integration of other systems for complete automation, such as different loading and unloading systems or other sheet metal processing equipment.
1) Automation saves time
2) Panel bending productivity is high
3) Highly flexible machines
4) Automatic parts processing
2. Advantages of flexible bending center
The flexible bending center can work independently and can efficiently produce parts of various specifications.
The general mold can be adjusted automatically according to the size set by the program without any adjustment time, which ensures the safety of the operator and the quality of the product.
The universal type does not require mold change time, it is adjusted in real time according to the length of the workpiece to ensure the quality of the workpiece. Since no manual operation is required, the personal safety of the operator has been greatly guaranteed.
The positioning process is done only once at the beginning of the entire bend, operating at the beginning of the cycle, stopping at the beginning, and rotating the part in a controlled manner. Sheet clamping and rotation remain unchanged during the bending cycle, and due to continuous rotation, 0.01° angular resolution is guaranteed for high production flexibility.
The flexible servo bending center minimizes manual intervention and makes the best use of available resources. Fully autonomous operation after initial offline programming.
Both of these two products realize the automation of bending, which is of great help to improve the bending efficiency. Wuxi Shenchong feels that they have their own advantages, but they also have some disadvantages. Different types of enterprises need to choose according to their own conditions and different products and production modes.