Design And Analysis Of Workpiece Carrier In High-pressure Casting Weir-cutoff Station

High-pressure casting weir-cutoff station is an important station of cylinderblock black production, and it is also a weak link in the production. The carrier isdedicated equipment, need to meet the job requirement and accuracy requirement,improve security and lower operating costs. I design the carrier,Based on commontransportation forms (including manual, motorcycle, lifting, conveyor andautomatically handing which, for example, industrial robots) and structurecharacteristics of cylinder block.According to functional requirements, transform conditions and workenvironment, four programs are proposed: the locomotive type, rectangular robottype, the type of joint manipulator and the lifting style. A comprehensive analysis ofthe programs obtained above, all the programs can meet the functional requirements,but the optimal performance is the locomotive type, which is choosed as the finalplan.On the basis of the overall program, the motorcycle-style carrier issystematically designed. From the perspective of function realization and thedesignation of the key parts, the specific design of the conveyor roller, the bracket,the feeding mechanism, the main mechanism and the catching mechanism arecompleted. At the same time, the topology optimization methods are used to guidethe design of critical parts. In order to reduce labor intensity and improve accuracy,PLC control is used, and three control methods are used based on differentconditions, they are manual control, semi-automatic control, automatic control.The positioning accuracy is an important performance indicators of the carrier,and the geometric errors and force deformation errors are of the greatest impact.The use of multi-body kinematics theory to mathematical modeling on themechanism’ geometric error, the early allocation of the original error based on theprobability method, and the use of tolerance grade to be adjusted for each error,which has once again proven to meet the accuracy requirements. The carrier’sdeformation analysis is carried out with Ansys workbench to obtain the relativeposition error of the workpiece and the corresponding sub-mechanism in keypositions, which is used to analyze the positioning error caused by forcedeformation and to provide the basis of improving the movement smoothnature ofworkpiece between sub-mechanisms.In order to verify the strength, the static stiffness and the dynamic stiffnessrequirements of the agency, the Ansys workbench is used in static and dynamic analysis of the organization as a whole. The main body mechanism (includingbracket, conveyor roller, the feed mechanism and the main mechanism) andcatching mechanism were analysed, and the main force components meet thestrength requirements. Refering to the crane standard, the static stiffness of the mainmechanism, the feed mechanism and catch mechanism met the stiffnessrequirements. Modal analysis was done in the main body mechanism and the catchmechanism, the dynamic stiffness requirements were met, the weak link of the mainbody mechanism are the slider support plate of the Z-direction movement, and theweak link in splice institutions is the support of the Y1-direction movement.