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Arc additive manufacturing method of controllable magnetic field assisted inclined members

An additive manufacturing and magnetic field-assisted technology, applied in the field of additive manufacturing, can solve problems such as difficulty in ensuring the forming quality, achieve the effects of overcoming the instability of stacked parts and edge collapse, reducing the amount of processing, and reducing the temperature gradient

Pending Publication Date: 2021-03-23
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for the addition of inclined structural parts, its forming will also be affected by gravity, so it is difficult to guarantee its forming quality

Method used

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  • Arc additive manufacturing method of controllable magnetic field assisted inclined members
  • Arc additive manufacturing method of controllable magnetic field assisted inclined members
  • Arc additive manufacturing method of controllable magnetic field assisted inclined members

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Embodiment 1: As shown in the figure, the inclined structure of the stainless steel cavity in this embodiment is a multi-layer and multi-channel structure. The height of the structure is 270 mm, the width is 60 mm, and the length is 210 mm. The angle between the structure and the substrate is 72°. The electric arc additive manufacturing power supply is FRONIUSTPS4000 GMAW power supply, the ABB robot is used as the motion mechanism, the welding machine is a CMT welding machine, and the filling wire in the forming process is 316L stainless steel wire with a diameter of 1.0mm. Arc additive manufacturing parameters: stacking speed of 4mm / s, wire feeding speed of 8m / min, stacking current of 147A, stacking process protective gas of 98.5% Ar+1.5% O 2 ,Specific steps are as follows:

[0047] Step 1: Input the preset parameters of the arc additive on the welding machine, and the controller transmits the manufacturing parameters fed back by the data processing module of the weldi...

Embodiment 2

[0053] Embodiment 2: As shown in the figure, the stainless steel retracted and inclined structural member in this embodiment is a multi-layer and multi-channel structure. The height of the structural member is 80mm, the total width is 500mm, the total length is 700mm, and the angle between the structural member and the substrate is 65°. The electric arc additive manufacturing power supply is FRONIUSTPS4000 GMAW power supply, the ABB robot is used as the motion mechanism, the welding machine is a CMT welding machine, and the filling wire in the forming process is 316L stainless steel wire with a diameter of 1.0 mm. Arc additive manufacturing parameters: stacking speed is 3.9mm / s, wire feeding speed is 8m / min, stacking current is 147A, protective gas is 98.5%Ar+1.5%O2 during stacking process, the specific steps are as follows:

[0054] Step 1: Input the preset parameters of the arc additive on the welding machine, and the controller transmits the manufacturing parameters fed back...

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Abstract

The invention provides an additive manufacturing method of controllable magnetic field assisted inclined members. The method comprises the steps that when multiple layers of inclined structural members are stacked, a gun head is kept perpendicular to the surface of a base plate, and when the multiple layers of inclined structural members are stacked to the last channel of each layer, the welding gun deviates outwards in the vertical direction; a high-frequency magnetic field is applied in the additive manufacturing process, the temperature gradient of a stacking area is reduced through magnetic field induction heat, and the residual stress and deformation of formed members are reduced; and meanwhile, an external magnetic field can generate upward magnetic field force to counteract the influence of edge collapse caused by various factors such as gravity and thermal stress, flow of a molten pool is inhibited, and then the stable and attractive inclined structural members are formed. By means of the method, the problems that in existing inclined structural member additive forming, accumulated member forming is unstable, and the edge collapses are solved; the surface flatness and continuity are improved, the additive forming post-treatment time is shortened, and continuous additive forming is achieved without long-time cooling; and according to the additive manufacturing method, high-quality and high-efficiency forming of the inclined structural members is realized.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, and in particular relates to an arc additive manufacturing method of a tilting member assisted by a controllable magnetic field. Background technique [0002] Arc additive manufacturing technology is a metal additive manufacturing technology that mainly uses gas metal shielded welding or tungsten inert gas shielded welding as the deposition heat source. Its deposition efficiency is 5 to 10 times that of laser and electron beam additive manufacturing technologies, and its energy utilization rate can reach several to dozens of times of the latter. Therefore, arc additive manufacturing technology has unique advantages in high-strength, low-cost, efficient and rapid manufacturing of large and medium-sized metal parts. [0003] Due to the precision limitation of arc deposition itself, arc additive manufacturing technology has low surface quality of formed parts, and its high heat input...

Claims

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Application Information

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IPC IPC(8): B23K9/04B23K9/08B23K9/32
CPCB23K9/04B23K9/08B23K9/32
Inventor 周琦胡宇鹏周伟宋世达洪浩源孙智鸣高健许雪宗
Owner NANJING UNIV OF SCI & TECH
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