Analysis Of Factors Influencing The Support Capacity Of Hydraulic Support Cylinder

With the development of the manufacturing industry,the level of the manufacturing industry is constantly improving,and intelligent manufacturing is listed as the future development trend of the manufacturing industry.Intelligent manufacturing requires automation of workpiece clamping.For thin-walled parts that are easily deformed during processing due to poor rigidity,auxiliary support is required during clamping.Traditional auxiliary support cannot automate workpiece clamping.As a kind of tooling fixture,the hydraulic support cylinder provides auxiliary support for the workpiece.Compared with the traditional auxiliary support,it has the advantages of automatic clamping and fast clamping efficiency.Although scholars at home and abroad have conducted research on auxiliary supports,most of the research has focused on the design of combined fixtures and the optimization of the layout of support points,while the research on the support force of support cylinders is rare.Hydraulic support cylinders are small,precision hydraulic components whose structural parameters have an important influence on the support force.In this paper,the non-thread hydraulic support cylinder is the research object,and the support capacity of the support cylinder is studied.Carried out the following research work:(1)The basic composition and working principle of the hydraulic support cylinder are briefly described.The mathematical model of the clamping force of the collet,the mathematical model of the friction force of the sealing ring,and the mathematical model of the deformation resistance of the collet are established.The mathematical model of the supporting force of the support cylinder.(2)Based on the mathematical model of the supporting force of the hydraulic support cylinder,the influencing factors are analyzed,and the influencing factors of the supporting force and their hierarchical relationships are clarified.Angle to the plunger slope,clearance between collet and plunger.The parameters are optimized and combined for the most influential links to obtain the optimal structural parameters that meet the required supporting force of the supporting cylinder.(3)Aiming at the deformation of the supporting cylinder during the working process,a finite element model was established by using finite element software,and the model was statically analyzed to study the influencing factors and influence rules of the deformation.The research results show that the displacement of the hydraulic support cylinder decreases first and then increases with the increase of the collet opening size;the displacement increases with the increase of the collet groove spacing;the displacement increases with the increase of the collet slope angle The amount decreases first and then increases;as the friction coefficient increases,the displacement decreases;as the support stroke of the support cylinder increases,the displacement increases.(4)Build a hydraulic support cylinder performance test rig to conduct a hydraulic support cylinder support capacity test study.The test results show that the optimized hydraulic support cylinder meets the support performance requirements.