Expore And Research Of Bending Mechanism Without Shaft

The press brake is widely used in basic industrial production.Bending mechanism,as the most critical mechanism,its design and research is of great significance to meet diversified demands in the manufacturing sector.The traditional press brakes have many disadvantages,such as the form of its working is single,its automation is in a low-level and it is easy to damage the sheet.In this paper,the author comes up with a new mechanism.This mechanism can bending the sheet without shaft.On the basis of gemel six-bar mechanism,the author design the new bending mechanism sketch and 3D modeling.In addition,the form of working and the application have been described.On the theoretical analysis,this paper adopt the complex vector method to analyze the kinematics.Theoretically infers the location,speed and accelerated speed of hinge joint in the movement.And based on D'Alembert principle,the author analyze the mechanism dynamic static and got the relationship between hinge point,gravity coordinates and the force.In order to get a better bending effect in the condition,this paper makes the point of rotation as a optimize aim,to build the design variable about hinge point and legs length,and constraints were established based on the practicality of bending equipment.The optimization results are shown in the case where the bending angle is 90 degrees,the x-axis offset of the bending plate rotation point is within 0.4 mm,and its effect on the bending is negligible,The y-axis offset of the bending point is larger,but the coordinate has little effect on the bendingeffect,and it can be compensated externally.According to the optimized results,the author analyze the kinematic simulation of the bending mechanism,determined the displacement,rotation angle and rotational speed of each component in the all working condition,and analyze the date.The stress of each hinge point on the x-axis and y-axis was determined by dynamic simulation,and the force of each component was analyzed.Based on the research,through theoretical analysis and mechanism simulation,The proposed bending mechanism has a certain feasibility,and has significant advantages in the form of bending.