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Fusion deposition forming manufacturing method of parts and molds

A technology of forming processing and manufacturing method, which is applied in the field of fusion forming processing and manufacturing of parts and molds, can solve the problems that the microstructure, properties and stability cannot meet the requirements, and achieve the effects of low cost, improved metallurgical quality and high forming efficiency

Active Publication Date: 2019-04-12
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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  • Fusion deposition forming manufacturing method of parts and molds
  • Fusion 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 manufacturing method for fusion deposition forming of parts and moulds, and belongs to the field of moldless growth manufacturing and remanufacturing. It includes the following steps: S1 performs layered slicing processing on the 3D CAD model of the workpiece to be formed, S2 obtains the NC codes of each layered slice, S3 performs fusion deposition and forming layer by layer according to the NC codes of each layered slice, and uses the laser to form the workpiece Fine parts, using one or more processes of arc, electron beam, electroslag welding and submerged arc welding to form thick-walled and non-fine parts of the workpiece, or S3 using a heat source or laser beam combined with a laser beam and a gas-shielded arc Combined heat source forming with vacuum shielded electron beam, shut down the gas shielded arc or shut down the vacuum shielded electron beam in the thin wall and delicate parts of the formed workpiece. The method of the invention can directly form the parts and molds with thin walls or fine parts with stable structure and performance and high manufacturing precision.

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 Patents(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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