Mechanical Properties Analysis Of Vertical Clamp Mechanism

Vertical clamp mechanism, Clamp Mechanism for short, is a kind of importantfast production device. It can realize continuous production for different shapeproducts by mold, including vertical rubber injection, vertical plastic injection,vertical die-casting and clamp mechanism as a key part. As a main loaded component,it affects the production efficiency, processing properties, precision of product, thegross weight and cost of the machine. Because the Clamp Mechanism serves in thepoor condition, such as the heavy clamping force, high temperature and alternatingload, it has high demand on structure properties of Clamp Mechanism. At present,there has found some pillars broken within working about 1 year in some enterprises.So it is very important to carry on mechanics properties analysis, calculate fatigue lifeof the key part, optimize the structure of the clamp mechanism and improve itsservice life.Focused on destroy phenomenon under proper condition and structurecharacteristics of the vertical clamp mechanism, the working condition of clampmechanism is studied and fast calculation method suited for clamp mechanism isresearched in this paper. Take rubber injection as an example, fast calculation ofclamp mechanism is established, the reasons of destroy is founded out and numericalanalysis is proved through the experiment. Based on fast calculation mold, theoptimization method was used to optimize the part of clamp mechanism, and satisfiedresult is obtained. Finally, the research in this paper includes following parts:The research's content in this paper including following parts:1. In this paper, the research development on clamp mechanism is investigated,former design and analysis methods on mold structure are introduced, and then theFEM on clamp mechanism structure's contact and non-liner analysis is put forward.2. According to structure characteristics and work condition of vertical clamp mechanism, fast calculation method of clamp mechanism is studied, and efficiencycalculation model is obtained. This method improves computing efficiency and set afoundation of CAE simulation for correlation enterprise.3. Mechanics properties analysis. Based on simplified model, it Adopts CAEnumerical simulation technology, Fore treatment of FEM with Hypermesh softwareand MSC. patran/marc to conduct contact and non-liner analysis for mechanicsproperties of clamp mechanism and check the key parts with strength theory.4. According to the result of FEM, stress amplitude is calculated, and fatigue lifeof the key part in the clamp mechanism is calculated through the stress-life method. Itexplains what causes destroy of clamp mechanism.5. Experimental verification. Under the different work conditions, the strain anddisplacement data on key position of clamp mechanism are collected from the testproject. Compared with numerical result, the validity of the mechanics model ofclamp mechanism and the efficiency of the fast calculation method of clampmechanism analysis are verified.6. Optimization-analysis based on the orthogonal experiment theory. Accordingto the orthogonal experiment theory, all the experiments are scheduled, and allexperimental data needed for optimization-analysis are obtained. Based on these dataand the relation between the test parameters and stress amplitude of key part,optimum schedule is obtained, which optimized the clamp mechanism and prolongedlifetime.The fast calculation method of clamp mechanics analysis is put forward in thispaper, which provides an efficient approach for vertical clamp mechanics analysis,solves the problem of clamp mechanism failure in the engineering practice. Theoptimization of the clamp key position provides gist for structure optimization ofclamp mechanism, and improves the service life of clamp mechanism.