CN-121797901-B - Casting method for embedding chiller into shell

CN121797901BCN 121797901 BCN121797901 BCN 121797901BCN-121797901-B

Abstract

The invention relates to the technical field of casting, in particular to a casting method for embedding a chill in a shell. The method comprises the steps of obtaining structural parameters of a casting, comparing the wall thickness of the casting with a preset threshold, planning a plurality of chill embedding areas on the surface position where the wall thickness is larger than the preset threshold, manufacturing a wax pattern module according to the surface orientation corresponding to the plurality of chill embedding areas, coating slurry on the wax pattern module to form a shell assembly, separating a product wax pattern from a chill wax pattern in the shell assembly after coating the shell assembly, placing a second chill entity in a first shell based on separation of the product wax pattern and the chill wax pattern, and carrying out a casting molding procedure on the shell assembly. Thus, the problem that the casting method needs to consider the close fitting of the chill and the casting efficiency is solved.

Inventors

JIN LEI
JIANG HAITAO
XIE HUASHENG
LIU TIANYU
MA LANBO
GUAN YANG
JING GAOYANG
SHUI GUOYAN
ZHANG LING
GAO YING

Assignees

中国机械总院集团沈阳铸造研究所有限公司

Dates

Publication Date: 20260508
Application Date: 20260309

Claims (8)

1. The casting method of the shell embedded chiller is characterized by comprising the following steps of: obtaining structural parameters of a casting, wherein the structural parameters comprise the surface orientation of the casting in a preset posture and the corresponding wall thickness dimension; comparing the wall thickness of the casting with a preset threshold value, and planning a plurality of chill embedding areas at the surface position where the wall thickness is larger than the preset threshold value; The method comprises the steps of manufacturing a wax pattern module according to the surface orientations corresponding to a plurality of chill embedding areas, wherein the wax pattern module comprises a product wax pattern, a chill wax pattern and a first chill entity, the product wax pattern has the same geometric shape as a casting, the chill wax pattern is positioned in the chill embedding area with the surface orientation of the product wax pattern in an upward state, the chill wax pattern and the product wax pattern are integrally formed, the first chill entity is positioned in the chill embedding area with the surface orientation of the product wax pattern in a downward state or a horizontal state, and the first chill entity is bonded with the product wax pattern; Coating slurry on the wax pattern module to form a shell assembly, wherein the shell assembly comprises a shell main body, a first shell and a second shell, wherein the shell main body is coated on the surface of the product wax pattern; separating the product wax pattern from the cold iron wax pattern in the shell assembly after coating based on the shell assembly; placing a second chill entity in the first shell based on completion of the product wax pattern and the chill wax pattern disengagement; carrying out a casting molding process on the shell component; The product wax mould is in the preset gesture, the diameter of the cold iron wax mould is gradually reduced from top to bottom, when the second cold iron body is placed in the first shell, a first area of the peripheral side wall of the second cold iron body is abutted with the first shell, and a second area of the peripheral side wall of the second cold iron body is arranged at intervals with the first shell, wherein the second area is positioned above the first area; the surface orientation manufacturing wax pattern module corresponding to the chill embedding areas comprises: manufacturing an integrally formed product wax mould and a cold iron wax mould; Preheating the chill embedding area of the product wax mould, wherein the surface of the product wax mould faces downwards or horizontally; Based on the preheating completion, respectively pasting the first chiller entities on the chiller embedding areas of which the surface of the product wax pattern faces downwards or horizontally; And coating the outer surface of the first chill body with an isolating wax film.
2. The casting method of the shell embedded chiller according to claim 1, wherein the thickness of the isolating wax film is 1 mm-2 mm.
3. The casting method of a shell-embedded chiller according to claim 1, wherein the thickness of the isolating wax film is gradually reduced from bottom to top in the preset posture of the product wax film.
4. The casting method of the shell embedded chiller according to claim 3, wherein the isolating wax film comprises a plurality of layers of isolating wax paper, the plurality of layers of isolating wax paper are sequentially wrapped on the outer surface of the first chiller body, and the product wax film is in the preset posture, and the area of the plurality of layers of isolating wax paper wrapping the first chiller body is gradually reduced downwards.
5. The method of casting a shell embedded chiller according to claim 1 wherein the barrier wax film extends upwardly from the bottom of the first chiller body to about 3/4 of the first chiller body.
6. The casting method of the cold iron embedded in the shell according to claim 1, wherein the product wax mould is of an annular structure, and the thickness of the inner ring of the shell main body is larger than that of the outer ring of the shell main body.
7. The method of claim 1, wherein said placing said second chill body in said first shell is based on said product wax pattern and said chill wax pattern being completed by a release process comprising: opening a placement opening on the first shell based on the completion of the separation of the product wax pattern and the chill wax pattern; placing the second chill body in the first shell through the placement port; And based on the second chill entity being placed in the first shell, plugging the placement opening to complete the placement step of the second chill entity.
8. The casting method of a shell-embedded chiller according to claim 7 wherein said casting said shell assembly comprises: Pouring molten metal into the shell assembly based on the completion of the placing step of the second chill body; cooling the shell component after pouring the molten metal for a preset period of time based on the pouring completion; and separating and cleaning the shell assembly to obtain the casting.

Description

Casting method for embedding chiller into shell Technical Field The invention relates to the technical field of casting, in particular to a casting method for embedding a chill in a shell. Background Investment casting is a core technology for producing precision castings, and the main process flow mainly comprises a plurality of continuous steps of wax injection molding, assembly module, slurry coating and hanging for shell making, dewaxing, pouring, solidification forming, shell removing and the like, so as to realize the forming of the precision castings. In the investment process, for the castings with thick and large end faces, the method is used for effectively controlling the solidification sequence of the castings, and the defects that shrinkage cavities, shrinkage porosity and the like of the castings affect the product quality are avoided. The local cooling speed of the casting is accelerated by adopting a chiller, so that the molding quality of the casting is ensured. However, castings generally have multiple thick large end faces, corresponding to the need for chiller assembly at multiple locations on the casting to meet cooling requirements. However, due to the difference of the positions of the end faces with different thicknesses, part of the positions are limited by space or assembly modes, and the close fitting of the chill and the casting efficiency are difficult to achieve. Disclosure of Invention In order to solve the problem that the casting method needs to consider the close fitting of the chill and the casting efficiency, the invention provides a casting method for embedding the chill into a shell, which comprises the following steps: obtaining structural parameters of a casting, wherein the structural parameters comprise the surface orientation of the casting in a preset posture and the corresponding wall thickness dimension; comparing the wall thickness of the casting with a preset threshold value, and planning a plurality of chill embedding areas at the surface position where the wall thickness is larger than the preset threshold value; The method comprises the steps of manufacturing a wax pattern module according to the surface orientations corresponding to a plurality of chill embedding areas, wherein the wax pattern module comprises a product wax pattern, a chill wax pattern and a first chill entity, the product wax pattern has the same geometric shape as a casting, the chill wax pattern is positioned in the chill embedding area with the surface orientation of the product wax pattern in an upward state, the chill wax pattern and the product wax pattern are integrally formed, the first chill entity is positioned in the chill embedding area with the surface orientation of the product wax pattern in a downward state or a horizontal state, and the first chill entity is bonded with the product wax pattern; Coating slurry on the wax pattern module to form a shell assembly, wherein the shell assembly comprises a shell main body, a first shell and a second shell, wherein the shell main body is coated on the surface of the product wax pattern; separating the product wax pattern from the cold iron wax pattern in the shell assembly after coating based on the shell assembly; placing a second chill entity in the first shell based on completion of the product wax pattern and the chill wax pattern disengagement; and carrying out a casting molding process on the shell component. Optionally, the product wax pattern is in the preset gesture, the diameter of the cold iron wax pattern gradually decreases from top to bottom, when the second cold iron entity is placed in the first shell, a first area of the peripheral side wall of the second cold iron entity is abutted to the first shell, a second area of the peripheral side wall of the second cold iron entity is arranged at an interval with the first shell, and the second area is located above the first area. Optionally, the manufacturing the wax pattern module according to the surface orientations corresponding to the plurality of chill embedding areas includes: manufacturing an integrally formed product wax mould and a cold iron wax mould; Preheating the chill embedding area of the product wax mould, wherein the surface of the product wax mould faces downwards or horizontally; Based on the preheating completion, respectively pasting the first chiller entities on the chiller embedding areas of which the surface of the product wax pattern faces downwards or horizontally; And coating the outer surface of the first chill body with an isolating wax film. Optionally, the thickness of the isolation wax film is 1mm-2mm. Optionally, the thickness of the isolating wax film gradually decreases from bottom to top in the preset posture of the product wax pattern. Optionally, the isolating wax film comprises a plurality of layers of isolating wax paper, wherein the plurality of layers of isolating wax paper are sequentially wrapped on the outer surface of the f