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Deposition forming manufacturing method of parts and molds

A technology of forming processing and manufacturing method, which is applied in the field of fusion deposition forming processing and manufacturing of parts and molds, can solve the problems that the structure performance and stability cannot meet the requirements, and achieve the effects of low cost, improved metallurgical quality, and a wide range of materials

Active Publication Date: 2016-09-21
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In addition, due to the high requirements on the structural mechanical properties and stability of parts and components in aerospace, marine engineering, energy and power industries, it is necessary to solve the problems of rapid heating, rapid solidification and free The characteristics of growth forming, cracking and porosity in the process of additive forming are unavoidable, and the structural properties and stability cannot meet the requirements.

Method used

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  • Deposition forming manufacturing method of parts and molds

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] In this example, a gas-shielded arc welding torch is used to prepare a die-casting mold with complex cooling channels and thin-walled and thick-walled shapes. The electric current is 250A, and its specific preparation method is as follows:

[0047] S1: According to the requirements of the shape, thickness and dimensional accuracy of the mold to be formed, the 3D CAD model of the workpiece to be formed is subjected to layered slice processing to obtain the data of the layered slice, and the data of each layered slice includes the layered slice Thickness, shape and dimensional accuracy,

[0048] S2: Carry out forming path planning according to the data of the layered slices, generate NC codes for each layered slice required for forming processing,

[0049] S3: Perform fusion deposition layer by layer according to the numerical control codes of each layered slice obtained in step S2. Specifically, on the substrate, according to the digital forming processing path obtaine...

Embodiment 2

[0054] A gas-shielded arc welding torch is used, and the welding current is 250A. According to the performance requirements of the injection mold cavity with complex fine ribs and cooling flow channels to be fabricated by deposition, stainless steel wire is used as raw material for forming.

[0055] S1: According to the requirements of the shape, thickness and dimensional accuracy of the mold to be formed, the 3D CAD model of the workpiece to be formed is subjected to layered slice processing to obtain the data of the layered slice, and the data of each layered slice includes the layered slice Thickness, shape and dimensional accuracy,

[0056] S2: Carry out forming path planning according to the data of the layered slices, generate NC codes for each layered slice required for forming processing,

[0057] S3: Perform fusion deposition layer by layer according to the numerical control codes of each layered slice obtained in step S2. Specifically, on the substrate, according to...

Embodiment 4

[0059] The electroslag welding method is adopted, the welding voltage is 25V, and according to the performance requirements of the mold cavity to be manufactured by deposition, low-alloy plates are used, and the digital forming process path obtained from the three-dimensional CAD model of the mold is used on the substrate layer by layer. deposition forming. Specifically:

[0060] S1: According to the requirements of the shape, thickness and dimensional accuracy of the mold to be formed, the 3D CAD model of the workpiece to be formed is subjected to layered slice processing to obtain the data of the layered slice, and the data of each layered slice includes the layered slice Thickness, shape and dimensional accuracy,

[0061] S2: Carry out forming path planning according to the data of the layered slices, generate NC codes for each layered slice required for forming processing,

[0062] S3: Perform fusion deposition layer by layer according to the numerical control codes of e...

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Abstract

The invention discloses a deposition forming manufacturing method of parts and molds, and belongs to the field of non-mold growing manufacturing and remanufacturing. The method comprises the following steps that S1, the three-dimensional CAD model of a workpiece to be formed is subjected to hierarchical slicing; S2, the CNC codes of all hierarchical slices are acquired; S3, deposition forming is conducted layer by layer according to the CNC codes of all the hierarchical slices, the fine portions of the workpiece are formed by laser, and one or more technologies in electric arc welding, electron beam welding, electroslag welding and submerged-arc welding is or are adopted to form the thick wall and the non-fine portions of the workpiece; or in the S3, a heat source which is compounded by laser beams and gas protection electric arcs or a heat source which is compounded by the laser beams and vacuum protection electronic beams is adopted for forming the thin wall and the fine portions of the workpiece, and the gas protection electric arcs or the vacuum protection electron beams are shut down. According to the deposition forming manufacturing method, direct deposition forming can be achieved to obtain parts and molds which are stable in structure property and high in manufacturing precision and are provided with thin walls or fine portions.

Description

technical field [0001] The invention belongs to the field of moldless growth manufacturing and remanufacturing of parts and moulds, and more specifically relates to a manufacturing method of fusion deposition forming of parts and moulds. Background technique [0002] The non-die deposition forming methods of high-density metal parts or molds mainly include high-power laser deposition forming, electron beam free forming, plasma arc and electric arc deposition forming and other methods. [0003] High-power laser deposition forming uses a high-power laser to melt the metal powder sent to the substrate layer by layer, and rapidly solidifies deposition forming, and finally obtains a near-final formed part. This method has high forming accuracy, and the density of the workpiece is much higher than that of selective laser sintering, but the forming efficiency, energy and material utilization are not high, it is difficult to achieve full density, and the equipment investment and ope...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/105B33Y10/00
CPCB33Y10/00B22F10/00B22F10/20B22F10/80Y02P10/25
Inventor 张海鸥王桂兰
Owner HUAZHONG UNIV OF SCI & TECH
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