Now many machinery manufacturers, are choosing to use injection molding machine manipulator as the main mode of production, but the use of automated robots in the production can improve product efficiency and product quality and reduce product production costs have greatly improved in the production of injection Machine robot can work accurately, in fact, is a three-dimensional space positioning problem, is a combination of a number of line and angle positioning.
In many simpler cases, a single magnitude may be dominant. Factors that affect the individual line or angular positioning errors are as follows:
1, positioning method
Different positioning methods have different influencing factors, such as mechanical stop positioning, positioning accuracy and the stopper stiffness and touch the stop block speed and other factors.
2, positioning speed
Positioning speed has a great influence on the positioning accuracy because the energy of the moving parts that must be dissipated is different when the positioning speed is different Generally, the positioning speed should be controlled reasonably to reduce the positioning error, for example, to improve the cushioning performance and cushioning efficiency of the cushioning device , Control the drive system to slow down the moving parts timely.
3, accuracy
Robot manufacturing accuracy and speed accuracy of the installation of a direct impact on the positioning accuracy.
4, stiffness
When the robot's own structural rigidity and contact stiffness is low, the positioning accuracy is generally low due to vibration.
5, the weight of moving parts
The weight of the moving parts includes the weight of the manipulator and the weight of the grasped object.Changes in the weight of the moving parts have a great influence on the positioning accuracy.Usually, the positioning accuracy decreases when the moving parts increase in weight.Therefore, not only the moving parts Its own weight, but also to consider the impact of grasping changes at work.
6, the driving source
Hydraulic and pneumatic pressure fluctuations and voltage, oil temperature, temperature fluctuations will affect the repeatability of the robot positioning accuracy, therefore, the necessary pressure regulator and adjust the oil temperature measures such as the use of accumulator to stabilize the oil pressure, with a heater or cooling Control oil temperature, low speed, with temperature, pressure compensation flow control valve control.
7, control system
Switch control, electro-hydraulic proportional control and servo control position control accuracy is not the same, not only because of the accuracy and sensitivity of various control components are different, but also with the presence or absence of position feedback device.