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A multi-scale material synchronous conveying device and a method for high-efficiency additive manufacturing

A conveying device and additive manufacturing technology, which is applied in the direction of manufacturing tools, laser welding equipment, welding equipment, etc., can solve the problems of increasing the end of the wire, increasing the wire feeding speed, increasing the force of the wire, etc., to achieve improved Stabilization, increase in heat input, effect of maintaining stability

Active Publication Date: 2022-03-15
北京煜鼎增材制造研究院股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the wire will directly enter the molten pool for melting during wire feeding, increasing the wire feeding speed will increase the disturbance of the end of the wire to the molten pool and damage the stability of the molten pool.
When the wire feeding amount is further increased, the force on the wire increases, which may cause the wire to break and affect the additive manufacturing process

Method used

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  • A multi-scale material synchronous conveying device and a method for high-efficiency additive manufacturing
  • A multi-scale material synchronous conveying device and a method for high-efficiency additive manufacturing
  • A multi-scale material synchronous conveying device and a method for high-efficiency additive manufacturing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] 316L stainless steel is used as the substrate. 316L stainless steel wire with a diameter of 1.6mm is used as the raw material, and 10 wires are conveyed at the same time, and the wire feeding speed is selected as 2.5m / min. Use 3 arcs + laser coupling to scan. The angle between the welding torch and the vertical direction is 30°, the distance between the tungsten electrode and the substrate is 5mm, the distance between the tungsten electrodes is 9mm, the welding current is 300A, and the scanning speed is 0.25m / min. The long axis diameter of the laser spot is selected as 8mm, and the laser power is calculated according to the formula, k 1 Take 5, k 2 Take 0.75, choose 3375W laser power. The distance between the laser spot center and the arc center is 2mm.

[0054] Formed surface quality is good. The formed sample was cleaned with absolute ethanol and weighed, and the forming efficiency was calculated by combining the weight of the substrate and the forming time, and ...

Embodiment 2

[0056] Using wire cutting, the A100 steel plate with a thickness of 10mm is cut into rods with a length of 1.5m and a width of 10mm, and the feeding speed is 0.8m / min. Scanning is performed using 4-arc coupling. The angle between the welding gun and the vertical direction is 35°, the distance between the tungsten electrode and the substrate is 4mm, the distance between the tungsten electrodes is 10mm, the welding current is 320A, and the scanning speed is 0.2m / min. When the end of the bar is transported to the molten pool, the scanning speed is reduced to 0.14m / min, the feeding speed is increased to 1.6m / min, and maintained for 1 second. After the new bar enters the molten pool, the process parameters are adjusted back to normal.

[0057] Due to the discontinuous delivery of the bar and the lack of laser-assisted stabilization of the molten pool, the surface quality is poorer compared with Example 1, and the surface has large ups and downs, but the ups and downs can be elimina...

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Abstract

The invention discloses a multi-scale material synchronous conveying device and a method for high-efficiency additive manufacturing. The multi-scale material synchronous conveying device includes a feeding part and a processing head; Shell structure; the processing head is a disc-shaped structure with a central opening; the feeding part is fixed on the upper surface of the processing head and the lower opening of the housing structure is facing the central opening of the processing head; The inside of the feeding part is provided with a plurality of center-symmetric limiting mechanisms to limit the material; the outer edge of the lower surface of the processing head is provided with a plurality of fixtures to connect with multiple heat sources, and the fixtures can move To adjust the position and inclination angle of the heat source. The special feeding device can realize the continuous delivery of wire, rod or strip, thus greatly improving the feeding amount and forming efficiency. At the same time, the present invention adopts the way of multi-heat source coupling, greatly increases the heat input, and cooperates with a large feeding amount, and the forming efficiency can reach 40kg / h or higher.

Description

technical field [0001] The invention relates to the technical field of additive manufacturing of metal materials, in particular to a multi-scale material synchronous conveying device and a method for high-efficiency additive manufacturing. Background technique [0002] Additive manufacturing technology is an advanced manufacturing technology that uses lasers, electric arcs, electron beams, etc. as heat sources to deposit molten materials layer by layer to form target parts. At present, the feeding methods of metal additive manufacturing are mainly wire feeding and powder feeding. For components with large size and heavy weight, high forming efficiency is required during additive manufacturing, which inevitably requires a large amount of wire or powder feeding. [0003] Powder feeding generally uses powder feeding gas to blow metal powder into the molten pool. If it is necessary to further increase the amount of powder feeding, it is necessary to increase the pressure of pow...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/348B23K26/70B23K9/167
CPCB23K26/348B23K26/702B23K9/167
Inventor 不公告发明人
Owner 北京煜鼎增材制造研究院股份有限公司