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Additive manufacturing method for parts with thin wall structure based on SLM process

A thin-walled structure, additive manufacturing technology, applied in the direction of process efficiency improvement, additive manufacturing, additive processing, etc., can solve the problems of high processing cost, cumbersome process, increased part design work, etc., to ensure the success rate and size. Stability, simple process design method, effect of reducing the cost of additive manufacturing

Active Publication Date: 2018-04-06
BEIJING SATELLITE MFG FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, such thin-walled parts are mostly manufactured by means of mechanical processing using rod or block raw materials, but this not only has high processing costs and long cycle times, but also wastes a lot of materials.
For some complex precision parts, the machining limitations of machining itself (such as tool limitations and other factors), which in turn increase the restrictions on the design work of the parts
[0004] Additive manufacturing not only releases many design constraints, but also reduces the raw materials consumed in the manufacturing process of thin-walled parts. However, since additive manufacturing is a laser processing technology, deformation and even misalignment are easy to occur during the manufacturing process of thin-walled parts.
The traditional solution is to thicken the thin-walled parts, and then perform machining to thin them later. The problem with this method is that the post-processing process is cumbersome, costly, and time-consuming.

Method used

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  • Additive manufacturing method for parts with thin wall structure based on SLM process
  • Additive manufacturing method for parts with thin wall structure based on SLM process
  • Additive manufacturing method for parts with thin wall structure based on SLM process

Examples

Experimental program
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Effect test

Embodiment 1

[0033] After the parts with thin-walled structure are optimally placed, the schematic diagram of the structure is as follows figure 1 As shown, this product is a connecting corner box, which is used to fix and connect two independent other parts. The size of the whole part is 170mm×163mm×132mm, and the angle between the thin-walled structure and the horizontal plane is 60°. The technical difficulty lies in its 3mm Thick and thin-walled structures are difficult to form and are easily deformed during the forming process; parts are made of aluminum alloy;

[0034] The part is manufactured using the additive manufacturing method of the SLM process, the steps of which include:

[0035] (1) Add process support to the thin-walled part of the part with thin-walled structure. After adding the process support, the slice layer of the thin-walled part changes, by image 3 The Type I slice layer in becomes Figure 4 The U-shaped slice layer in , to get the process model of the parts with...

Embodiment 2

[0040] After the parts with thin-walled structure are optimally placed, the schematic diagram of the structure is as follows Figure 5 As shown, this product is a fan blade with fins facing inward. Its function is to use high-speed rotation to generate compression to increase gas pressure. The size of the entire part is Among them, the angle between the thin-walled structure and the horizontal plane is 77° to 45°, and the technical difficulty is that the thin-walled structure with a gradual thickness of 0.5 to 1mm is difficult to form and easy to deform during the forming process; the parts are made of titanium alloy materials;

[0041] The part is manufactured using the additive manufacturing method of the SLM process, the steps of which include:

[0042] (1) Add process support to the thin-walled part of the part with thin-walled structure. After adding the process support, the slice layer of the thin-walled part changes, by Figure 7 The Type I slice layer in becomes Fi...

Embodiment 3

[0047] After the parts with thin-walled structure are optimally placed, the schematic diagram of the structure is as follows Figure 9 As shown, this product is a fan blade with outward fins. Its function is to use high-speed rotation to generate air pressure to increase the gas pressure. The size of the entire part is Among them, the angle between the thin-walled structure and the horizontal plane is 77° to 45°, and the technical difficulty is that the thin-walled structure with a gradual thickness of 0.5 to 1mm is difficult to form and easy to deform during the forming process; the parts are made of titanium alloy materials;

[0048] The part is manufactured using the additive manufacturing method of the SLM process, the steps of which include:

[0049](1) Add process support to the thin-walled part of the part with thin-walled structure. After adding the process support, the slice layer of the thin-walled part changes, by Figure 11 The Type I slice layer in becomes Fig...

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Abstract

The invention relates to an additive manufacturing method for parts with a thin wall structure based on an SLM process, and belongs to the technical field of laser advanced additive manufacturing. According to the additive manufacturing method, the problem that aluminum alloy or titanium alloy thin wall structural components printed by an existing additive manufacturing method are difficult to form, prone to deforming and prone to breaking due to large stress can be solved; the cost of additive manufacturing can be reduced, the success of additive manufacturing of the aluminum alloy thin wallstructural components is ensured, and a practical and reliable process support design method for the additive manufacturing of the aluminum alloy or titanium alloy thin wall structural components is provided.

Description

technical field [0001] The invention relates to an additive manufacturing method for parts with thin-walled structures based on SLM technology, which belongs to the technical field of advanced laser additive manufacturing. The inclination angle of the thin-walled structure in the parts is not less than 45°, and the The wall thickness is 1-3mm; the length of the largest outer envelope of the thin-walled structural part is at least 10 times the wall thickness of the thin-walled structural part, and the maximum outer envelope width of the thin-walled structural part is at least the wall of the thin-walled structural part 10 times thicker. Background technique [0002] The thin-walled structure in additive manufacturing is a typical unit of components, and it is a commonly used structural form in aviation and spacecraft structures. For example, many large-scale satellite-loaded connecting brackets use aluminum alloy thin-walled structural feature parts. The main characteristics...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/105B33Y10/00
CPCB33Y10/00B22F10/00B22F10/40B22F10/68B22F10/66B22F10/28B22F10/62Y02P10/25
Inventor 聂中原蒋疆陈怡王震巩维艳王哲陈材张伟贵官祥威祁俊峰
Owner BEIJING SATELLITE MFG FACTORY
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