Is the fiber laser cutting machine stable in use
The main component is to ensure the rigidity and stability of the experimental platform of the plane fiber laser cutting machine during operation, and it is necessary to conduct stress and strain analysis on its key components. From the ADAMS simulation results, it can be found that when the moving branch chain slider is in the working stroke, the moving platform bears more force. According to the dynamic simulation results, the measured constraint reaction force at the hinge joint between connecting rod 1 and the movable platform is greater than 431.2851N. According to the position of the rod in the working stroke, the force direction of the movable platform can be solved, and fixed constraints are set at the bottom of the movable platform to obtain the overall stress distribution cloud diagram and displacement cloud diagram of the movable platform. Due to the movable platform formed by the welding of the plates, the influence of the welding seam and the dynamic load is considered. The strength and rigidity of the platform that bears the pulling force of the connecting rod and the gravity of the placed object is of great significance to the safety of the experimental platform of the plane fiber laser cutting machine. Load according to the ADAMS coordinate system and component position, and the data is exported through ADAMS. The location of the stress concentration mainly occurs at the hinged joint of the movable platform and the connecting rod. The greater stress is 1.2427 MPa, and the stress distribution of the remaining parts is lower than 0.1386 MPa, which will not cause damage to the movable platform. The position of the hinged joint between the movable platform and the connecting rod has a greater deformation, which is 0.005mm, and the deformation is within the allowable range. The slider connector plays an important role in the rigidity and reliability of the cutting machine. Through finite element simulation, the stress distribution of the slider can be obtained more intuitively, and the stress on each section can be checked. Set the bottom of the slider as a fixed constraint, and apply a force of 54.91N in the X-axis direction, -3.2N in the Y-axis direction, and 221.51N in the Z-axis direction on the hinged hole (upper hole) of the slider. ; Apply the same force to the hinged hole (lower hole) as the upper hole to solve.
The material selected for the slider is 45 steel, the yield strength is 360MPa, the safety factor nu003d3 is selected, and the allowable stress is 120MPa. The greater stress is at the corner of the top of the slider, and the greater stress value is 1.9083MPa. The method of increasing the fillet can effectively reduce the stress concentration, and the stress of other parts of the slider is less than 0.212MPa, which shows that the design can meet the requirements. Larger deformation appears on the front end surface of the upper part of the slider, the deformation size is 0.0027 mm, and the deformation meets the requirements.
Based on the three-degree-of-freedom 6PRR redundant parallel mechanism, an experimental platform for a plane fiber laser cutting machine is designed. Compared with the traditional fiber laser cutting machine, it has high precision, high speed, Advantages such as large rigidity. The structure design and component selection of the mechanism are carried out, and the approximate size and overall proportion of the experimental platform of the fiber laser cutting machine are determined. Carry on simulation analysis through ADAMS, according to the simulation result, revise and optimize the initial size. Based on ANSYS, finite element analysis of the main components was carried out, and the structural strength was checked to ensure the safety and stability during the overall operation process, laying the foundation for the actual prototype manufacturing.