Casting mold locating and locking structure of vertical centrifugal casting machine

Abstract

The invention belongs to the technical field of centrifugal casting and relates to a casting mold locating and locking structure of a vertical centrifugal casting machine. A casting mold comprises a bottom plate, a cover plate and a metal cylinder sleeve; a circular recess concentric to a vertical centrifugal machine spindle is formed in a centrifugal machine chassis; the bottom plate of the casting mold is located in the circular recess of the vertical centrifugal machine chassis; M screw holes are uniformly formed on the surrounding of the circular recess of the centrifugal machine chassis; a pressing plate is also arranged above the cover plate; the pressing plate is shaped like a circular ring; the inner circle diameter of the pressing plate is larger than that of the outer edge of a pouring gate boss of the cover plate; the outer circle diameter of the pressing plate is larger than the diameter of the cover plate; M projecting parts are arranged at the edge of the pressing plate; a bolt slot is formed in each projecting part; and the screw holes of the centrifugal machine chassis and the bolt slots of the pressing plate, which correspond to each other, are locked by M locking bolts. According to the invention, through the adoption of a circular recess locating mode on the bottom plate, the bottom plate is accurately located as well as rapidly and conveniently assembled and disassembled; and the pressing plate, the bolts and the chassis form a top cover cage railing type structure, so that the safety is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of centrifugal casting, and in particular relates to an embedded positioning and locking structure of a casting mold of a vertical centrifugal casting machine. Background technique [0002] Before using the vertical centrifuge for centrifugal casting, it is necessary to position and install the designed mold on the chassis of the vertical centrifuge and lock the mold and the chassis of the centrifuge. There are two ways to combine the mold. One is by It is composed of two parts, that is, the metal sleeve and the bottom plate are connected into one body and the cover plate is composed, and the second is composed of three parts, that is, the bottom plate, the cover plate and the metal sleeve. There are two positioning methods between the casting mold and the centrifuge chassis designed by the traditional method. One is that the casting mold is placed on the centrifuge chassis, and the outer circle of the centr...

AI Technical Summary

Problems solved by technology

There are two positioning methods between the casting mold and the centrifuge chassis designed by the traditional method. One is that the casting mold is placed on the centrifuge chassis, and the outer circle of the centrifuge chassis is used as the reference, so that the outer circle of the casting mold is aligned with the outer circle of the chassis. The distance is equal to perform preliminary alignment, and then precise alignment and positioning. The positioning operation is more troublesome and labor-intensive, but this is a common practice; The bottom plate and the main shaft are connected by keys or pins, which is very inconvenient to disassemble and assemble, so it is rarely used

The disadvantage of these two positioning methods is that either the positioning is not convenient enough, or it is very difficult to disassemble.

Bottom locking is the locking between the centrifuge and the cast bottom plate. There are two locking methods: ① There are 8 radial T-slots with an angle of 45° between them on the centrifuge chassis, relying on 8 The T-slot in the T-slot uses bolts to fix the cast base plate after alignment and positioning, and then locks it. This locking method is more commonly used, but the locking operation is more troublesome and the production efficiency is lower.

②The main shaft of the centrifuge is connected with the center hole of the casting bottom plate, and it is very inconvenient to disassemble and assemble, so it is seldom used

The disadvantages of this combination of casting molds are: firstly, whether it is the bottom locking or the upper locking, the locking device is in direct contact with the mold. Due to the action of the superalloy liquid, the working temperature of the locking device is generally 400°C ~500°C, the mechanical properties of the locking device are greatly affected; secondly, due to the limitation of the space position of the casting mold itself, the number and size of the locking device (bolts, screws, pins, or inclined boxes, etc.) will be restricted when designing.

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