Design and manufacturing process of plastic pump head

As the core component of the hydraulic end of the plunger pump, the emulsion pump head body bears great pressure. Therefore, the finite element analysis of the pump head body is of great significance to improving the reliability and rationality of product design. Due to the particularity of the pump head body structure, studying its processing technology and improving processing efficiency is the key to reducing production costs and improving product competitiveness. Analyze the movement law of the plunger pump, the pulsating flow rate and the pressure fluctuation caused by the pulsating flow rate, so as to obtain the relevant factors that cause the pressure fluctuation, provide a theoretical basis for the design and improvement of the plunger pump, and also for the analysis of the head The state of force provides an important theoretical basis.

Using the analysis of the stress distribution law and fatigue life distribution state of the emulsion pump head body under the maximum stress condition, the improvement measures of the pump head structure are proposed based on the analysis results. According to the working conditions and structural characteristics of the pump head body, the process route of the pump head body from material, blank, large diameter hole nesting, lathing stepped holes, milling inch threads, rolling to hydraulic self-reinforcement is given, and the analysis is focused on The characteristics of nesting drills, selecting the structure type of workpiece rotation and external chip removal, detailed analysis of nesting drill drilling related technology, such as cutting power, cutting amount selection, cooling and chip removal, and nesting drills are different from ordinary holes Auxiliary device for processing equipment.

Tool parameters are an important factor affecting the machining efficiency and service life of the tool. Since the nest drill works in a confined space, while meeting the processing efficiency, the determination of chip breaking and chip removal is the key to the design of the nest drill. The influence of the tool axial vibration on the cutting angle during the hole drilling process is analyzed, and the theoretical basis for the influence factors of the hole axis deflection is given. Inch thread processing is performed by milling, and the application of macro programs improves the efficiency of thread milling. In order to increase the strength and service life of the pump head body, the inner cavity is prestressed by the hydraulic self-reinforcement method of the inner hole.

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