Method and process structure for manufacturing impact-type runner outer bucket by die forging

By dividing the impeller into a central body and an outer water bucket, and employing a double-water bucket model and die forging technology, the problems of high forging stress and low material utilization in the outer water bucket were solved, thereby improving material utilization and reducing manufacturing costs.

CN117531940BActive Publication Date: 2026-06-23DONGFANG ELECTRIC MACHINERY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
DONGFANG ELECTRIC MACHINERY
Filing Date
2023-11-17
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

In the existing technology, the die forging method of the outer water bucket of the impact impeller has the problems of high stress, low material utilization and high manufacturing cost.

Method used

Stress analysis was used to divide the runner into a central forging and an external water bucket. A symmetrical double water bucket model was established and closed. Forging and die forging technologies were used, combined with CNC machine tools and additive manufacturing, to separate the external water bucket.

Benefits of technology

It increases the utilization rate of forging materials to over 60-70%, reduces manufacturing costs, simplifies mold design, and improves the molding effect.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application discloses a method and a process structure for die forging manufacturing of an impulse runner outer bucket, and the method comprises the following steps: establishing an outer bucket model, symmetrically distributing two flow surfaces of a target outer bucket to form a double-bucket model; performing closing treatment on an outer gap between the two opposite flow surfaces of the double-bucket model to form a double-bucket semi-closed cavity model; designing and manufacturing upper and lower die molds according to the double-bucket semi-closed cavity model; manufacturing a forging blank and performing die forging by using a die forging machine and the upper and lower die molds to obtain a double-bucket product; and after the product is detected to be qualified, sawing the product into two single outer buckets and processing the two single outer buckets to meet the design size precision requirements. The application can improve material utilization of the impulse runner outer bucket and reduce manufacturing cost.
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