Quick-speed manufacturing method of complicated ceramic

A technology of ceramic parts and manufacturing method, which is applied in the field of rapid manufacturing of complex ceramic parts, can solve the problems of large distance between powder particles, low mechanical properties of parts, and low density of green body, and achieves high density, low internal stress, high density and so on. The effect of efficiency

Inactive Publication Date: 2009-03-25
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this process step may have the following problems: due to the low density of the green body, the distance between the powder particles is too large, often resulting in the failure to densify during high temperature sintering, and thus the mechanical properties of the part are low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0033] (1) According to the density of the preform of the ceramic part formed by LOM and the possible dimensional changes after cold isostatic pressing, the part size of the preform is calculated from the final part size, and a certain machining allowance is left.

[0034] (2) Use 3D modeling software (such as UG, ProE) to draw the 3D CAD model of the part according to the calculated blank size, then process it with the slicing software and save it as an STL file, and transfer the data information of the STL file to LOM for rapid prototyping system.

[0035] (3) Using Al with a thickness of 0.5mm 2 o 3 The ceramic film is used as the raw material, and the three-dimensional ceramic part blank is formed on the LOM system.

[0036] (4) After covering the blank of the ceramic part with a sheath, it is placed in a cold isostatic pressing furnace for pressure treatment.

[0037] The method of sheathing is as follows: uniformly mix hydroxyl-terminated polybutadiene (HTPB) and tolu...

example 2

[0043] (1) According to the density of the preform of the ceramic part formed by LOM and the possible dimensional changes after cold isostatic pressing, the part size of the preform is calculated from the final part size, and a certain machining allowance is left.

[0044] (2) Use 3D modeling software (such as UG, ProE) to draw the 3D CAD model of the part according to the calculated blank size, then process it with the slicing software and save it as an STL file, and transfer the data information of the STL file to LOM for rapid prototyping system.

[0045] (3) Using the SiC ceramic thin film with a thickness of 0.3mm as the raw material, the three-dimensional ceramic part blank is formed on the LOM system.

[0046] (4) After covering the blank of the ceramic part with a sheath, it is placed in a cold isostatic pressing furnace for pressure treatment.

[0047] The method of sheathing is as follows: uniformly mix hydroxyl-terminated polybutadiene (HTPB) and toluene diisocyana...

example 3

[0053] (1) According to the density of the preform of the ceramic part formed by LOM and the possible dimensional changes after cold isostatic pressing, the part size of the preform is calculated from the final part size, and a certain machining allowance is left.

[0054] (2) Use 3D modeling software (such as UG, ProE) to draw the 3D CAD model of the part according to the calculated blank size, then process it with the slicing software and save it as an STL file, and transfer the data information of the STL file to LOM for rapid prototyping system.

[0055] (3) Using the AlN ceramic film with a thickness of 0.2mm as the raw material, the three-dimensional ceramic part blank is formed on the LOM system.

[0056] (4) After covering the blank of the ceramic part with a sheath, it is placed in a cold isostatic pressing furnace for pressure treatment.

[0057] The method of sheathing is as follows: uniformly mix hydroxyl-terminated polybutadiene (HTPB) and toluene diisocyanate (T...

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Abstract

The invention discloses a rapid manufacturing technology of complex ceramic parts, comprising the following steps: firstly, the initial billet of the ceramic parts is manufactured by utilizing the LOM technology and taking a ceramic film as the raw material; the initial billet of the ceramic parts is covered with a sheath and treated with pressure treatment after being put into an isostatic cool pressing furnace; the pressed billet of the ceramic parts is treated with degreasing treatment and high temperature sintering; and finally, a small quantity of subsequent processing is carried out to the parts near net-shape forming according to the precision requirements of the geometric dimension and shape of the parts. The essence of the invention is that isostatic cool pressing and LOM rapid shaping technologies are organically combined, the initial billet of the ceramic parts after LOM rapid shaping is treated with the isostatic cool pressing, thus improving the density of the billet and being beneficial to the subsequent sintering and densification processes. The invention combines the advantages of the LOM technology and the isostatic cool pressing technology, avoids complex mould design or sheath design, improves the performance of the final ceramic parts and is suitable for the manufacturing and small scale production of the ceramic parts with complex shape and structure.

Description

technical field [0001] The invention belongs to the field of advanced manufacturing, and in particular relates to a rapid manufacturing method of complex ceramic parts. technical background [0002] As an important structural material, ceramics have the advantages of high strength, high hardness, high temperature resistance, and corrosion resistance, and are widely used in many fields. However, the hard and brittle characteristics of ceramics bring many difficulties to the forming and processing of ceramic parts. Especially ceramic parts with complex shapes usually need to be realized through complex molds. However, complex molds require high production costs and long production cycles, which restrict the production of prototypes and small batches of ceramic parts. Today, with increasingly fierce market competition and faster product updates, this production situation is increasingly unable to meet the needs of survival and development of modern enterprises. [0003] Lami...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/622B28B1/00B28B11/08
Inventor 史玉升蔡道生闫春泽徐林
Owner HUAZHONG UNIV OF SCI & TECH
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