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Arc additive manufacturing method

A technology of additive manufacturing and electric arc, which is applied in the field of additive manufacturing, can solve the problems of increased workload and the inability to accurately control the machining allowance, and achieve the effect of ensuring surface quality, reducing machining allowance, and freely controlling the forming width

Inactive Publication Date: 2020-03-17
AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Without adjusting the welding parameters, the width formed by multi-lap joints can be adjusted by increasing or decreasing the number of passes, and the machining allowance cannot be freely and precisely controlled under the optimized process parameters.
If the development of process parameters is re-developed according to the component width every time, it will also increase a lot of workload

Method used

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Examples

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Embodiment 1

[0042] Example 1: When it is necessary to process additive manufacturing of 24mm thick stainless steel rectangular structural parts, a compound path combining straight paths on both sides and a triangular broken line path is used for forming. The working parameters are low-frequency pulse frequency 10-30Hz, and base value current 150- 200A, pulse current 90A, duty cycle 50%, ultra-audio pulse frequency 20-60kHz, current 60-90A, wire feeding speed 180-300cm / min, welding speed 20-40cm / min, single bead width 10mm, extra processing Measure one side 1mm, height 1.1-1.5mm; triangular broken line path width 14mm, overlap 4mm; use high-purity argon for frontal protection, flow (15-25) L / min; according to figure 2 Arc additive path and forming process parameters Cyclic arc additive forming to obtain a superalloy structural part blank with a length of 180mm, a width of 26mm, and a height of 50mm, with a machining allowance of 1mm on one side.

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Abstract

The invention relates to an arc additive manufacturing method. The method includes the following steps that step 1: a welding wire required by a formed structural component is selected, and working parameters for restraining the forming width of the formed structural component are set; step 2, a base plate subjected to acid pickling is ground flat, is wiped clean by the aid of absolute ethyl alcohol or acetone and then is fixed to a workbench, and the levelness of the base plate is guaranteed; step 3, the shape of each layer of the formed structural component is deposited on the base plate according to the working parameters in step 1, after the shapes are finished, forming technology parameters are adopted, the central blank area is accumulated according to the compound path, and deposition of the whole part is completed layer by layer. The compound path planning method with the additive shape pre-restrained and middle multiple paths combined is adopted, so that the forming width of the arc-additive-formed part can be controlled freely, the surface quality can be guaranteed, and the final machining allowance can be reduced.

Description

technical field [0001] The invention relates to the technical field of additive manufacturing, in particular to an arc additive manufacturing method. Background technique [0002] Compared with the current laser additive (powder feeding) manufacturing technology, the arc additive manufacturing speed is fast and the wire material utilization rate is high. It is not sensitive to metal materials and can form materials with high laser reflectivity, such as aluminum alloy and copper. Alloy etc. Compared with the electron beam fuse additive manufacturing technology, the plasma arc / arc additive manufacturing does not require a vacuum chamber, and the manufactured parts are not limited by the size of the vacuum chamber, and can avoid the coarse grains caused by the slow cooling speed of the parts in the vacuum environment Phenomenon. More importantly, arc additive equipment has low cost, high deposition efficiency, and free and flexible operation, which is especially suitable for ...

Claims

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Application Information

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IPC IPC(8): B23K9/04B23K9/16B23K9/235B33Y10/00
CPCB23K9/04B23K9/16B23K9/235B33Y10/00B23K2103/10B23K2103/12
Inventor 万晓慧郭德伦刘颖贾婧怡陶军
Owner AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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