Strength Calculation and Optimal Design of Structure of Plate Welded Plunger for Extruder
The plunger will bear great stress when the extruder is working,so the strength calculation and check must be carried out in the design.Compared with the traditional forge welded plunger,the plate welded plunger is more prone to stress concentration while lightening self-weight.The force analysis of the main structure of the plunger is carried out,the main load is extracted,and the strength calculation of the middle section of the plunger structure is carried out by means of the elastic mechanics theory of thick-walled cylinder,and the equivalent stress calculation formula under the fourth strength theory is derived.According to the calculation results,three reinforced schemes are put forward,and the strength of the reinforced plunger structure is calculated with the finite element method,the stress state of the plunger under load is simulated,the strength is checked,and the most suitable design scheme for production and manufacture is analyzed and discussed.
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