A kind of water pump impeller casting and its production process

Abstract

The invention discloses a production process of a water pump impeller casting. The outer mold of the water pump impeller casting consists of a double-sided pattern plate, an upper pattern, an upper mold runner, a direct pouring rod seat, a riser, a lower pattern, a lower mold runner A, The runner B of the lower mold, the air outlet piece of the upper mold, the air outlet piece of the lower mold, the air outlet needle and the riser socket of the lower mold are composed of two opposite upper molds on the top of the double-sided mold, and a circle is placed on the periphery of each upper mold. The sprue of the upper mold is arc-shaped, the side of the upper mold opposite to the runner of the upper mold is provided with an air outlet piece of the upper mold, the top of the upper mold is distributed with air outlet needles, and the bottom of the double-sided plate is provided with a lower mold opposite to the upper mold , the periphery of the lower pattern is distributed with the lower mold sprue B, and the side of the lower pattern is provided with the lower mold runner A communicating with the lower pattern. The present invention changes the shortcomings of the original manufacturing process that the shape of the blade needs to be changed and the error is large, so that the theoretical hydraulic performance of the original design can be reflected to the greatest extent, without increasing the weight of the casting, and reducing energy consumption and manufacturing cost.

Description

technical field [0001] The invention relates to the technical field of water pump impeller castings, in particular to a water pump impeller casting and a production process thereof. Background technique [0002] The impeller is the core component of the water pump and the main factor affecting the working efficiency. The impeller of the water pump is made of cast iron. The blades on the impeller of the water pump play a major role again, and the shape and size of the impeller of the water pump are closely related to the performance of the water pump. [0003] Most of the existing impeller manufacturing processes are to make sand cores by means of blade extraction. Due to the influence of blade curvature changes, most blades cannot achieve complete extraction, and some adjustments to the blade shape must be made to achieve this. As a result, the hydraulic performance of the original design cannot be fully exerted, resulting in a large error in the dimensional accuracy of th...

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Problems solved by technology

[0004] The purpose of the invention is to provide a water pump impeller casting and its production process. The invention changes the shortcomings of the original production process that requires changing the shape of the blade and large errors, so that the theoretical hydraulic performance of the original design can be reflected to the greatest extent, and does not need to increase Casting weight, reduce energy consumption and production cost, to solve the problems raised in the above-mentioned background technology

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