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A Casting Defect Control Method and Application of Lattice Sandwich Structural Parts

A sandwich structure and casting defect technology, which is applied to casting molding equipment, cores, molds, etc., can solve problems such as loose structure segregation, and achieve great application prospects

Active Publication Date: 2019-10-22
辽宁红银金属有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are serious structural defects such as porosity, pores, slag inclusions, and tissue segregation.

Method used

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  • A Casting Defect Control Method and Application of Lattice Sandwich Structural Parts
  • A Casting Defect Control Method and Application of Lattice Sandwich Structural Parts
  • A Casting Defect Control Method and Application of Lattice Sandwich Structural Parts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Such as Image 6 As shown, in this embodiment, the module preparation process is as follows: making the sprue mold → pressing the sprue wax pattern → trimming the sprue wax pattern → assembling the part wax pattern → combining the gating system → trimming the module. See Table 4 to Table 6 for runner dimensions. First, press various sprue wax patterns, and then press Figure 1-Figure 3 Check size, press Figure 4-Figure 5 Combination: (1) Arrange the cores of the lattice structure on the lower plate 6 with a length of 1.2m, a width of 0.8m and a thickness of 3mm, such as Figure 7 Shown; Then the plate 5 is assembled and welded to make a part wax pattern. (2) Press on the upper plate 5 Figure 4-Figure 5 Place ingates and runners, such as Figure 8 shown. (3) Place the sprue cup on the combined runner to form a module, such as Figure 9 shown. After the assembled wax pattern is placed for a certain period of time, the shell is made. Before pouring, the shell is...

Embodiment 2

[0052] Such as Image 6 As shown, in this embodiment, the module preparation process is as follows: making the sprue mold → pressing the sprue wax pattern → trimming the sprue wax pattern → assembling the part wax pattern → combining the gating system → trimming the module. See Table 4 to Table 6 for runner dimensions. First, press various sprue wax patterns, and then press Figure 1-Figure 3 Check size, press Figure 4-Figure 5 Assembling: (1) Assembling the part wax mold, first arrange the V-shaped sheet cores on the lower plate 6 with a length of 1.2m, a width of 0.8m, and a thickness of 3mm, and then assemble and weld the upper plate 5 to make a part wax model, such as Figure 11 shown. (2) Press on the upper plate 5 Figure 4-Figure 5 Place ingates and runners. (3) Place sprue cups on the assembled runners to form modules. After the assembled wax pattern is placed for a certain period of time, the shell is made. Before pouring, the shell is preheated at 1000°C for ...

Embodiment 3

[0054] Such as Image 6 As shown, in this embodiment, the module preparation process is as follows: making the sprue mold → pressing the sprue wax pattern → trimming the sprue wax pattern → assembling the part wax pattern → combining the gating system → trimming the module. See Table 4 to Table 6 for runner dimensions. First, press various sprue wax patterns, and then press Figure 1-Figure 3 Check size, press Figure 4-Figure 5 Assembling: (1) Assemble the part wax model, first arrange the cores of the lattice structure on the lower plate 6 with a length of 1.2m, a width of 0.8m, and a thickness of 3mm, and then assemble and weld the upper plate 5 to make a part wax model, such as Figure 13 shown. (2) Press on the upper plate 5 Figure 4-Figure 5 Place ingates and runners. (3) Place sprue cups on the assembled runners to form modules. After the assembled wax pattern is placed for a certain period of time, the shell is made. Before pouring, the shell is preheated at 10...

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Abstract

The invention relates to the field of precision casting and material preparation, in particular to a lattice core sandwich structural part casting defect control method and application. A pouring system containing grid type horizontal pouring passage structures and rain sprinkling type inner pouring passage structures is adopted, the inner pouring passages in diffusion distribution are conducive to complete mold filling of thin wall positions, meanwhile, the effects of dispersing heat, avoiding hot joint generation and feeding risers are achieved, furthermore, the inner pouring passages further play a role of reinforcing tendons or ribs, cracking caused by solidification contraction is prevented, in addition, the pouring system adopts a closed type, namely areas of cross sections of the pouring passages are smaller and smaller, slag blocking and bubble filtering are facilitated, molten metal is subjected to high-temperature refining treatment before being poured, slag and gas are removed, the tilting height of a crucible is controlled during pouring, the mold-filling pressure is increased, mold shells are preheated at high temperature, and the complete mold filling of casting partsis guaranteed. The lattice core sandwich structural part casting defect control method and application are suitable for the casting process of complex lattice core sandwich structural parts and othersimilar parts, meet the development requirements for future aerospace products and have a long application prospect.

Description

Technical field: [0001] The invention relates to the field of precision casting and material preparation, in particular to a casting defect control method and application of lattice sandwich structural parts. Background technique: [0002] Due to the unique mechanical environment and harsh service conditions, higher requirements are placed on the structure of parts used in the aerospace field: ultra-lightweight and multi-functional structures. The lattice sandwich structure is considered to be the most potential structure-function integration material due to its lightweight and efficient structural form and open internal space. The dot matrix sandwich structure consists of upper and lower layers of panels and a core in the middle. The panel is a large plane structure, which mainly plays the role of bearing pressure and resisting the impact of airflow; the core is a lattice structure, which is a spatial grid structure composed of thin rods or sheets, which mainly plays the r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C9/08B22D27/04B22D27/09
Inventor 杨金侠周亦胄王海伟孙晓峰
Owner 辽宁红银金属有限公司
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