As the core part of the plunger pump's hydraulic end, the emulsion pump body bears great pressure. Therefore, the finite element analysis of the pump body is of great significance for improving the reliability and rationality of the product design. Due to the particularity of pump head structure, the key to reduce production cost and improve product competitiveness is to study its processing technology and improve processing efficiency. This paper analyzes the motion law, pulsating flow and pressure fluctuation caused by pulsating flow of piston pump, and obtains the relevant factors causing pressure fluctuation, which provides theoretical basis for the design and improvement of piston pump, and also provides important theoretical basis for analyzing the stress state of pump head.
The stress distribution rule and the fatigue life distribution state of the emulsion pump head under the maximum stress condition are analyzed, and the improvement measures of the pump head structure are put forward based on the analysis results. According to the working conditions and structural characteristics of the pump head body, the process routes of the pump head body from material, blank, large diameter hole nesting processing, turning step hole, milling inch thread, rolling to hydraulic self reinforcement are given. The characteristics of the nesting drill are emphatically analyzed, and the structural types of workpiece rotation and external chip removal are selected. The relevant drilling processes of the nesting drill, such as the change of cutting power and cutting parameters, are analyzed in detail Selection, cooling and chip removal, as well as the auxiliary device of nesting drill which is different from ordinary hole processing equipment.
Tool parameters are important factors that affect tool processing efficiency and service life. As the nesting drill works in a closed space, the determination of chip breaking and chip removal mode is the key to the design of nesting drill while meeting the processing efficiency. In addition, the influence of tool axial vibration on cutting angle in drilling process is analyzed, and the theoretical basis of influencing factors of hole axis deviation is given . The application of macro program improves the efficiency of thread milling. In order to increase the strength and service life of the pump head, the inner cavity is prestressed by the inner hole hydraulic autofrettage method.

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