Cast manufacturing method of rapid sand casting based on SLA prototype

A sand casting and casting technology, which is applied in the field of rapid sand casting and mould manufacturing, can solve the problem of not establishing a rapid sand casting process parameter library, and achieve the effects of saving manpower and material resources, improving efficiency and accuracy, and shortening engineering time.

Active Publication Date: 2013-09-18
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing technology has not yet developed a casting process CAD system based on the SLA prototype based on the characteristics of the light-curing prototype, and has not established a rapid sand casting process parameter library based on the SLA prototype, so it cannot comprehensively solve the design problems in casting mold manufacturing

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  • Cast manufacturing method of rapid sand casting based on SLA prototype
  • Cast manufacturing method of rapid sand casting based on SLA prototype
  • Cast manufacturing method of rapid sand casting based on SLA prototype

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Embodiment 1

[0041] The invention discloses a casting mold manufacturing process parameter correction method for rapid sand casting based on SLA prototype, which includes correcting casting line shrinkage ε and draft angle.

[0042] As a preferred mode, the linear shrinkage rate ε of the casting is according to the formula: ε =(1+ ε 合金 ) / (1- ε SLA树脂 ) for correction, where ε 合金 and ε SLA树脂 are the linear shrinkage rates of the alloy and SLA resin respectively, and the draft angle is increased by 45% on the basis of the value specified in the traditional process ("Casting Handbook (Volume 5, Casting Process)", Machinery Industry Press, 2003) %~97%.

[0043] As a preferred mode, the corrected casting linear shrinkage ε is shown in Table 1, and the corrected draft angle is shown in Table 2. A library of process parameters for different casting materials and sizes for rapid sand casting based on SLA prototypes was established.

Embodiment 2

[0045] Adopt the casting mold manufacturing process of the rapid sand mold casting based on SLA prototype described in the present invention to prepare casting mold, specifically comprise the following steps:

[0046] 1) Analyze the part. Analyze the shape and size of parts to obtain measurement data.

[0047] 2) Determine the mold making plan (pouring position, parting surface, quantity and arrangement of castings in the sand box, sand core design, outer mold design of castings).

[0048] 3) Using the process parameter correction method described in the present invention to determine the process parameters. Set process parameters including machining allowance, casting line shrinkage, draft angle, non-processing wall thickness negative allowance, minimum wall thickness, minimum casting hole, reverse deformation, process correction amount and parting negative number, etc. The process parameters are set according to the regulations ("Casting Handbook (Volume 5, Casting Process...

Embodiment 3

[0056] Adopt the casting mold manufacturing process of the rapid sand mold casting based on SLA prototype described in the present invention to prepare casting mold, specifically comprise the following steps:

[0057] 1) Analyze the part. Analyze the shape and size of parts to obtain measurement data.

[0058] 2) Determine the mold making plan (pouring position, parting surface, quantity and arrangement of castings in the sand box, sand core design, outer mold design of castings).

[0059] 3) Using the process parameter correction method described in the present invention to determine the process parameters. Set process parameters including machining allowance, casting line shrinkage, draft angle, non-processing wall thickness negative allowance, minimum wall thickness, minimum casting hole, reverse deformation, process correction amount and parting negative number, etc. The process parameters are set according to the provisions of the "Casting Handbook (Volume 5, Casting Pr...

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Abstract

The invention discloses a cast manufacturing method of a rapid sand casting based on an SLA prototype, which combines the SLA rapid prototyping technology based on a conventional cast manufacturing method. The method comprises the following steps: in a whole cast design, exploiting a cast technology CAD system software as a main auxiliary application tool, and conducting cast simulating and technology optimization through a technology CAE system; and after finishing the cast design, manufacturing an SLA prototype piece through a light curing model mechanism, forming the cast by the modeling and the assembling of the cast, and manufacturing metal products by pouring. Meanwhile, by modifying the linear shrinkage and the draft angle of the cast, and adopting technical ways of phenol-urethane resin bonded sand molding, and the like, the efficiency and the accuracy of design and manufacturing of a casting technology designer are improved; manpower and material resources are saved; the engineering time is shortened, so as to facilitate the popularization and application of the rapid casting technology.

Description

technical field [0001] The invention belongs to the field of casting, in particular to a rapid sand casting mold manufacturing method based on SLA prototype. Background technique [0002] Sand casting is the most commonly used technology in the foundry industry, and the stereolithography (SLA) technology using the principle of material additive manufacturing can realize the manufacture of complex shape parts. The rapid sand casting technology formed by combining SLA technology with sand casting technology is currently a preferred process for quickly obtaining complex metal parts. Combined with the sand casting process, the metal parts can be manufactured quickly. This rapid sand casting technology based on SLA prototype has the characteristics of low cost and short manufacturing cycle, and is suitable for single-piece and small-batch production, especially for new product development. [0003] The mold design and manufacture of rapid sand casting based on SLA prototype is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50B22C9/02
Inventor 蔡勇龚伟李华白朝中张翔李自胜黄华川
Owner SOUTHWEAT UNIV OF SCI & TECH
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