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Metal part additive manufacturing method based on contour features

A metal parts, additive manufacturing technology, applied in the field of metal parts additive manufacturing based on contour features, can solve the problems of low quality, high equipment cost, low material utilization rate, etc., to achieve low cost, good labor conditions, and efficiency. high effect

Active Publication Date: 2013-10-16
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the existing rapid prototyping method for metal laminated solid manufacturing, the process is cumbersome because the processing and welding are completed on two stations; the processing is by means of a laser cutting system, and the equipment cost is relatively high; The materials are laid out as a whole and then most of the waste materials are removed by laser cutting system, so the material utilization rate is low; and the large area of ​​materials will make the contact area between the electrode and the sheet material large, resulting in a small resistance welding current power density, and the welding thickness can be very large small, low quality

Method used

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  • Metal part additive manufacturing method based on contour features
  • Metal part additive manufacturing method based on contour features
  • Metal part additive manufacturing method based on contour features

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0041] Example 1: a figure 1 The shown method of additive manufacturing of metal parts based on curved profile features

[0042] Part manufacturing for this constant-width single-track curved profile feature:

[0043] 1. Establish the CAD geometric model of the metal part and extract the STL model of the part;

[0044] 2. The width of the metal part model is 6.5mm and the length is 100mm. Considering that there is a certain blank margin, you can choose to send out a sheet with a width of 7mm; according to the design of the resistance welding process, use a metal sheet with a thickness of 2mm, which can be Parts with good morphology, structure and mechanical properties are obtained. Therefore, a metal sheet with a width of 7 mm and a thickness of 2 mm is used as the welding raw material.

[0045]3. The contour point set of the STL model is extracted and filled by the layered slicing software, and a G code containing manufacturing information such as feeding thickness 2mm and...

example 2

[0049] Example 2, a figure 2 The metal part manufacturing method based on part entity manufacturing shown

[0050] For the manufacture of this kind of metal part with a hole in the middle and a wide width:

[0051] 1. The outer contour of the metal part model is 50mm in width, 100mm in length, and the diameter of the middle hole is 40mm. Establish the CAD geometric model of the metal part and extract the STL model of the part;

[0052] 2. Use a metal sheet with a width of 10mm and a thickness of 1mm as the welding material.

[0053] 3. According to the STL model and the width and thickness of the raw material, the contour point set of the STL model is extracted and filled by the layered slicing software to generate a G code that can be recognized by the machine tool. This G code can control the movement of the workbench according to the planned part manufacturing path, that is, first control the completion of the single-layer multi-channel manufacturing of the entire part p...

Embodiment 3

[0062] Embodiment 3: a kind of image 3 The metal part manufacturing method based on part entity manufacturing shown

[0063] For the manufacture of such metal parts with local bosses:

[0064] 1. The outer contour of the metal part model is 24mm in width, 150mm in total length, 50mm in length at both ends, and 12mm in width. Establish the CAD geometric model of the metal part and extract the STL model of the part;

[0065] 2. Use a metal sheet with a width of 12mm and a thickness of 3mm as the welding material.

[0066] 3. According to the STL model, as well as the width and thickness of the raw material, the contour point set of the STL model is extracted and filled by the layered slicing software, and a G code that can be recognized by the machine tool is generated.

[0067] The G code can control the movement of the workbench according to the planned part manufacturing path, that is, first control the completion of the single-layer multi-channel manufacturing of the enti...

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Abstract

The invention discloses a metal part additive manufacturing method based on contour features, which comprises the following steps: 1, establishing a metal part CAD (Computer Aided Design) geometric model, and extracting an STL(Standard Template Library) model; 2, determining the manufacturing direction of the metal part according to the contour features and the complexity of the metal part, and carrying out the route planning on the part additive manufacturing; 3, rotationally slicing the STL model by using a layered slicing software, and generating a control command by a computer according to the contour information; 4, sending panel veneer with set width and thickness by a panel veneer feeding mechanism under the control of the control command, and shearing; and 5, finishing the welding of layers under the actions of heat generated by resistance welding or friction stirring welding as well as rolling, and meanwhile removing contour burrs through compounding the same-station milling, repeating the step 4 and the step 5, till finishing the forming of the whole part, and if not meeting the part precision requirement, adding the part finish machining step at last. Compared with the prior art, the manufacturing method has the advantages of less process, high forming quality, short manufacturing period, low cost and the like.

Description

Technical field [0001] The present invention is a metal parts forming manufacturing technology, which is specifically for the manufacture method of metal parts based on contour -based characteristics. Background technique [0002] Rapid Prototyping and Manufacturing (RPM) originated in the late 1980s. Due to the unique and technological advantages of its principles, fast prototype manufacturing technology verified plastic, paraffin, paper, etc.Non -metallic prototype rapid forming technology, to directly or indirectly prepare the rapid manufacturing technology of various molds, and then to the current fast metal parts quickly manufacturing technology, rapid prototype manufacturing technology has achieved rapid development and practical application.At this stage, there are about 30 rapid manufacturing technologies of metal parts. The classification is mainly classified according to the characteristics of thermal source.) And laser near -shaped manufacturing (Lenshaping (Lens); ele...

Claims

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Application Information

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IPC IPC(8): B23P15/00
CPCB33Y10/00
Inventor 张海鸥谢仰彭彦召王桂兰
Owner HUAZHONG UNIV OF SCI & TECH
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