General drilling mould for hub of drum-type rotating sieve

Abstract

A general drilling mould for a hub of a drum-type rotating sieve comprises a base, an index gear and a mandrel. The general drilling mould is characterized in that one end of a body is hinged on the base, the rotatable mandrel is mounted on the body, the index gear is positioned above the body and fixed on the mandrel, a thrust bearing and a nut are assembled at the lower end of the mandrel, the upper end of the mandrel is connected with a press plate through a bolt, the other end of the body is connected with a toothed positioning block in a sliding mode, a stirring groove is formed in the tooth-shaped positioning block, the stirring pin is arranged on a rotating piece connected with a handle, and the stirring piece is inserted into the stirring groove of the tooth-shaped positioning block. A positioning sleeve is mounted on the mandrel in a sleeved manner. Sizing blocks in different sizes are provided and are disposed on the base to fix turning angles of the body. Special drilling templates of different types are provided and are connected at one end of the base through bolts. The general drilling mould is adaptive to processing needs on hubs with different bore diameters of drum-type rotating sieves, the turning angles can be adjusted and can be equally divided into multiple angles, equally-divided angles are accurate, drilling positions are accurate, the general drilling mould is simple and convenient to process and operate and labor-saving, processing time is greatly shortened, and processing efficiency is obviously improved.

Description

technical field [0001] The invention belongs to a universal drilling tool, in particular to a universal tool for drilling drum-shaped rotating filter screen hubs. Background technique [0002] The drum-shaped rotary screen is the core water filtration equipment of the nuclear power plant seawater filtration system, and the hub of the drum-shaped rotary screen is the core component of the drum-shaped screen. The position and shape of the connection hole of the drum net hub is similar to a cone, and it is necessary to drill equal connection holes in different diameter ranges of the conical surface, and the drilling direction is perpendicular to the conical surface. At present, the conical surface angles of various types of drum mesh hubs are different, ranging from 10° to 15°. There are two equal parts of the connection hole: 20 equal parts and 24 equal parts. The maximum outer diameter of the hub is about 2 meters, and the aperture size is 3. There are two kinds of specifica...

AI Technical Summary

Problems solved by technology

The machining accuracy of the coupling holes on the hub of the drum filter is directly related to the overall assembly quality of the drum filter and whether the rotation accuracy of the drum net after installation can meet the design requirements. To process the coupling holes of the hub, special molds need to be made to meet the processing accuracy requirements. Need, each wheel hub needs to make a special drilling mold, each mold has similar structure and heavy structure, and making multiple tires will cause waste of materials

Each mold is laborious to operate, and after a few times of use, the positioning accuracy of the circumferential division decreases, which affects the processing quality, and more molds are produced, which makes the maintenance and storage of the mold more demanding.

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