Casting equipment for flange with diameter of phi 800 millimeters or more and casting method thereof

Abstract

The invention relates to technical field of large thick-wall cast steel flange casting, in particular to casting equipment for a flange with a diameter of phi 800 millimeters or more and a casting method thereof. The casting equipment is suitable for a casting device for a caste steel flange with the diameter of phi 800 millimeters ore more and a wall thickness greater than 50 mm. The casting equipment comprises a metal cold mold I, a metal cold mold II, a base, a pouring funnel tube and a casting tube, wherein the metal cold mold I is coaxially connected to the upper end of the metal cold mold II; the metal cold mold II is coaxially connected to the upper end of a base box cylindrical cavity; the pouring funnel tube is coaxially connected to the upper end of the casting tube; the casting tube is coaxially connected to the upper end of a base box square cavity; and a main sand core is coaxially connected inside the metal cold mold I and the metal cold mold II. The casting method is simple and feasible, is simple and convenient in field operation, is common in tool, is safe and reliable in operation, breaks through a conventional cast steel part riser setting method, applies a thick and large metal type strong chilling theory, adopts a casting mode of integrally heightening the riser, solves the problem that internal casting defects cannot be eliminated as the riser and cold iron are arranged in a large cast steel part in a spaced mode, and ensures the structure inside to be compact.

Description

technical field [0001] The invention relates to the technical field of large-scale thick-walled cast steel flange casting, and specifically a flange casting tool with a diameter of 800 mm or more and a casting method thereof, which is suitable for a cast steel flange casting device with a diameter of 800 mm or more and a wall thickness of more than 50 mm. Background technique [0002] Flange, also known as flange flange or flange, is a part that is connected to each other between shafts, or a connection between two devices. It has a wide range of applications and a large market demand. There are mainly four types of flange production processes: forging, casting, cutting, and rolling. Cutting and rolling are limited by the size of the rolled slab. The flanges produced are within a certain range, mainly thin-walled flanges; The conventional production method is still mainly forging and casting. The internal quality of forged flange is high, but the production cost is high, and...

AI Technical Summary

Problems solved by technology

The conventional process for steel castings is as follows: place an external chiller at the bottom of the outer circle of the flange, set uniform risers on the top, and set riser feeding on the side of the flange; affected by the shrinkage characteristics of the cast steel material, it is easy to fit large thick-walled flanges. There are shrinkage cavities, shrinkage porosity, and slag inclusions in the upper part of the blank; high-quality flanges that require flaw detection cannot pass the non-destructive flaw detection inspection and cannot be placed on site; Considering the market demand and economy of large thick-walled cast steel flanges, there is an urgent need for a simple and practical casting method to produce high-quality large thick-walled cast steel flanges

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