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Method for quickly and precisely casting complex parts

A technology of precision casting and complex parts, which is applied in the field of rapid precision casting of complex parts, can solve the problems of low shell forming efficiency, difficult casting mold manufacturing, long shell making cycle, etc., to achieve shortened production cycle, high forming efficiency, and production short cycle effect

Inactive Publication Date: 2008-11-12
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the shell making process of repeatedly coating ceramic slurry limits the complexity of castings to a certain extent. For example, it is difficult to replicate features such as small holes and deep grooves on the surface of the investment pattern. At the same time, the shell forming efficiency is not high, and the shell making cycle long
Although the grouting method such as gypsum casting and ceramic casting can ensure the one-time molding of the mold and the shell-making efficiency is high, it requires mold removal operations, and it is difficult to manufacture molds with complex shapes.

Method used

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  • Method for quickly and precisely casting complex parts
  • Method for quickly and precisely casting complex parts
  • Method for quickly and precisely casting complex parts

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Example 1, see figure 1 ,2,3, figure 2 The impeller shown has a complex curved surface shape, and the distance between the blades is very narrow, and its profile is difficult to design, so it is difficult to manufacture, and the process proposed in the present invention can solve this problem well. The specific implementation steps are as follows:

[0032] 1) Preparation of resin investment mold: use 3D modeling software to figure 2 The three-dimensional model of the impeller shown is subjected to shelling processing, and the solid parts are pumped into hollow parts, and the wall thickness of the shell is 0.6mm, and then the resin model of the part is made by using the light-curing rapid prototyping equipment; the surface of the resin model is prefabricated for discharge Pores for excess resin;

[0033] Using light-curing rapid prototyping equipment, the prototype of the resin casting system was produced;

[0034] Use light-curing rapid prototyping equipment to ma...

Embodiment 2

[0050] Embodiment 2,1) rapid preparation of resin mold

[0051] Use 3D modeling software to extract the shell of the 3D model of the part to be prepared, extract the solid part into a hollow part, and the wall thickness of the shell is 1mm, and then use the light-curing rapid prototyping equipment to make the resin shape of the part;

[0052] Using light-curing rapid prototyping equipment, the prototype of the resin casting system was produced;

[0053] Use light-curing rapid prototyping equipment to make a resin mold shell with an outer profile larger than the resin pattern with one end opening, assemble the resin pattern, pouring system and resin mold shell together to form a resin mold, and the distance between the resin pattern and the resin mold shell is 10mm, used to fill ceramic slurry to form a mold;

[0054] 2) Configure high solid phase, low viscosity ceramic slurry

[0055] a. Ingredients: take deionized water or distilled water, and take ceramic powder silicon ox...

Embodiment 3

[0069] Embodiment 3,1) rapid preparation of resin mold

[0070] Use 3D modeling software to extract the shell of the 3D model of the part to be prepared, extract the solid part into a hollow part, and the wall thickness of the shell is 1.5mm, and then use the light-curing rapid prototyping equipment to make the resin shape of the part;

[0071] Using light-curing rapid prototyping equipment, the prototype of the resin casting system was produced;

[0072] Use light-curing rapid prototyping equipment to make a resin mold shell with an outer profile larger than the resin pattern with one end opening, assemble the resin pattern, pouring system and resin mold shell together to form a resin mold, and the distance between the resin pattern and the resin mold shell is 10mm, used to fill ceramic slurry to form a mold;

[0073] 2) Configure high solid phase, low viscosity ceramic slurry

[0074] a. Ingredients: take deionized water or distilled water, and take ceramic powder zirconia...

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Abstract

The invention provides a quick precision casting method for complex parts. The method uses a photosensitivity rapid prototyping technique to prepare a resin part prototype, a pouring system resin prototype and a resin process die shell which are then combined together to form a die; the method uses a gel-casting processing technique to pour ceramic slurries with high solid-phase and low viscosity into the die cavity so as to form a ceramic casting blank by quick in-situ solidification; the ceramic casting blank is dried and the resin prototype is burned and sintered to obtain the ceramic casting which contains the downsprue; finally, high-temperature metal liquid is poured into the ceramic casting; after being cooled, the ceramic casting is mechanically destroyed to obtain the precision casting. The method requires no manufacturing of metal dies, uses the ceramic casting prototyping which has high efficiency, good precision and short production period, and is especially suitable for the quick manufacture of middle and small batches and the trial-manufacture of new products in the precision castings with complex shapes.

Description

technical field [0001] The invention relates to the field of investment precision casting, in particular to a rapid precision casting method for complex parts based on light curing rapid prototyping technology and gel injection molding technology. Background technique [0002] Investment casting, a casting process with little or no cutting, is an excellent technology in the foundry industry, and it is widely used. The preparation of the ceramic shell is an important link in the investment casting production, which is obtained by repeatedly coating the ceramic slurry on the surface of the prefabricated investment pattern (usually a wax pattern). In order to prepare investment patterns, it is necessary to design and manufacture special metal dies. For some castings with complex shapes, the design and manufacture of metal dies are costly, long-term, and difficult. [0003] RP technology is a rapid molding technology developed rapidly in the past ten years. It uses the princip...

Claims

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Application Information

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IPC IPC(8): B22C7/02B22C9/00B29D31/00B28C1/04B28B1/14B28B11/24B29D99/00
Inventor 李涤尘郭楠楠吴海华崔锋录
Owner XI AN JIAOTONG UNIV
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