Novel assembling and welding process of spiral shaft of high-weir type double-spiral classifier

Abstract

The invention relates to a novel welding process in machine manufacturing and solves the problems of high coaxiality requirement of each component after assembling and welding in the process of manufacturing by using a traditional method and difficulty of a traditional manufacturing process in meeting the requirement. By using the novel assembling and welding process of the spiral shaft of the high-weir type double-spiral classifier, the traditional manufacturing process for producing long-shaft assembling and welding parts is changed, the production process is simplified, the production cost is reduced, and the product quality is improved. Thus, when the spiral-shaft type classifier is operated, the vibration is less, the noise is low, the rotating speed can be increased, so as to increase the production efficiency, the service life of a bearing can be prolonged, and the service life of the spiral classifier is greatly prolonged.

Description

【Technical field】 [0001] The present invention relates to a new welding process in mechanical manufacturing, specifically a new welding process for the screw shafts of a high-weir type double-helix classifier. Process two threaded holes, use bolts to screw into the threaded holes to adjust the circular runout of the long shaft, and then segmentally weld the shaft head to replace the traditional manufacturing process of long shaft assembly welding. Solve the problems of low coaxiality, large circle runout and difficult manufacturing in the traditional manufacturing process. 【Background technique】 [0002] As we all know, the particle size classification in the beneficiation process of various metal ore and non-metallic ore uses a spiral classifier to classify minerals with different particle sizes in the water medium with different sedimentation velocities. Spiral classifiers can be divided into high-weir type and submerged type. The screw shaft of high-weir type double-scre...

AI Technical Summary

Problems solved by technology

This traditional manufacturing process is labor-intensive and time-consuming, which makes the manufacturing cost of the screw shaft high, and it does not necessarily guarantee high assembly accuracy after precision machining is used in manufacturing.

The manufacturing difficulty is mainly due to the fact that the screw shaft is very long and heavy. After welding and assembly, due to the misalignment of manufacturing benchmarks, inspection benchmarks, and assembly benchmarks, the journal protrudes from one end of the hollow shaft during welding and will sag due to length and weight. The center line of the hollow shaft forms an included angle, causing the radial circular runout of the hollow shaft and the journal to be far out of tolerance

As a result, the reinforcing ribs, the flange and the center line of the hollow shaft do not necessarily coincide, making the manufacturing accuracy of the screw shaft poor

If such a screw shaft is mounted on the classifier, the large vibration and noise will be generated due to the large coaxiality error of the screw shaft when the classifier is running.

The screw shaft produced by the traditional manufacturing process cannot really achieve the purpose of qualified products

[0003] The new process method of welding the spiral shaft of the high weir double-helix classifier solves the problem that the coaxiality of each component after welding is high in the traditional manufacturing process, and the traditional manufacturing process is difficult to achieve.

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