Rotor Machining and Diaphragm Casting Process of Oil-Free Claw Vertical Pump

Abstract

The invention relates to the technical field of vacuum acquisition, in particular to the rotor processing and diaphragm casting process of an oil-free claw vertical pump. The casting process of the primary partition (3), the secondary partition (5) and the tertiary partition (7) is hot box coated sand casting, and the finished blank is a casting with a machining allowance of 3mm. The processing technology of the first-stage rotor (14), the second-stage rotor (15), the third-stage rotor (16) and the fourth-stage rotor (17) includes blank annealing treatment, blank sandblasting, turning, grinding, fitter, milling, boring , Milling keyway. Partition-coated sand has small gas generation, high strength, less pores in castings, and high yield. The rotor has high processing precision and short processing cycle, which can realize standardized production.

Description

technical field [0001] The invention relates to the technical field of vacuum acquisition, in particular to the rotor processing and diaphragm casting process of an oil-free claw vertical pump. Background technique [0002] The existing rotor processing route is: round bar, forging (forging into a cuboid sheet with machining allowance), grinding (grinding the upper and lower sides of the cuboid blank on a surface grinder), wire cutting ( Based on the ground side, fix it on the machine tool, cut out the outer contour, inner hole and keyway of the rotor, leave a machining allowance of 0.5mm for the outer contour and inner hole, and process the keyway to the size required by the drawing), turning (using The chuck clamps the outer contour of the rotor, turns out the end face, and turns the inner hole to the size required by the drawing), grinding (based on the end face, put another plane on a surface grinder, and grind the thickness to the required size of the drawing size), gr...

AI Technical Summary

Problems solved by technology

[0002] The existing rotor processing route is: round bar, forging (forging into a cuboid sheet with machining allowance), grinding (grinding the upper and lower sides of the cuboid blank on a surface grinder), wire cutting ( Based on the ground side, fix it on the machine tool, cut out the outer contour, inner hole and keyway of the rotor, leave a machining allowance of 0.5mm for the outer contour and inner hole, and process the keyway to the size required by the drawing), turning (using The chuck clamps the outer contour of the rotor, turns out the end face, and turns the inner hole to the size required by the drawing), grinding (based on the end face, put another plane on a surface grinder, and grind the thickness to the required size of the drawing size), grinding (fix the mandrel through the inner hole of the rotor on the cylindrical grinding machine, and grind the outer contour of the rotor), and some rotor processing techniques have cumbersome processing procedures, long cycle times, and low precision, resulting in difficult assembly of the whole machine, The device is unstable

[0003] The existing partition casting process route is: core making (resin sand, cold box core shooter core), cavity making (clay sand is used as the cavity), mold closing (pouring), and partition casting process , due to the use of cold box resin to make the core, the core strength is poor, and the resin sand has a large amount of gas, which is easy to drift the core, resulting in many pores, air leakage, sand inclusions, fire choking, and low yield of the casting.

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