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Metallic arc additive manufacturing method

A technology of additive manufacturing and metal arc, which is applied in the field of metal welding processing, can solve the problems of many additive layers, large stacking errors, and inability to meet the precision requirements of workpieces, so as to avoid low precision and improve precision.

Active Publication Date: 2019-01-25
南京衍构科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For the additive manufacturing process of large metal components, due to the large number of additive layers and large stacking errors, the existing arc additive manufacturing methods cannot meet the accuracy requirements of the workpiece

Method used

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Experimental program
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Effect test

Embodiment 1

[0035] The metal arc additive manufacturing method of the present invention specifically comprises the following steps:

[0036] Step 1. Model the workpiece to be printed. According to the material properties of the workpiece (material: 4043, diameter: 1.2, wire feeding speed: 5.5m / min), the layer height of each layer of additive material is obtained as Hp (Hp=2.8mm According to the empirical value obtained according to the process), use the arc additive slicing software to slice the digital model of the part in the Z direction according to the layer height Hp to obtain a two-dimensional contour map; use the parallel line scanning algorithm to generate the additive path, set Add material path code for adding material one layer at a time;

[0037] Step 2, the robot executes according to the additive path code in step 1, and adds materials;

[0038] Step 3, after the addition of step 2, scan the surface of the additive product by laser, use the height range filter and contour f...

Embodiment 2

[0041] The metal arc additive manufacturing method of the present invention specifically comprises the following steps:

[0042]Step 1. Model the workpiece to be printed. According to the material properties of the workpiece (material: 4043, diameter: 1.2, wire feeding speed: 7.5m / min), determine the height of each layer of additive layer as Hp (3.2mm), use The arc additive slicing software slices the digital model of the part in the Z direction according to the layer height Hp to obtain a two-dimensional contour map; use the parallel line scanning algorithm to generate the additive path, and set a multi-layer additive (N>1) Additive path code;

[0043] In step 2, the robot executes the additive path code in step 1 to add materials; that is, to add layers of materials continuously;

[0044] Step 3, after the addition of step 2, scan the surface of the additive product by laser, use the height range filter and contour filter to obtain the actual height H of the additive, and o...

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Abstract

The invention discloses a metallic arc additive manufacturing method. The method comprises the following steps that step 1, modeling is performed on a to-be-printed workpiece, the height of each additive layer is determined to be Hp according to the material properties of the workpiece, and layered slicing is performed on a part mathematical model according to the layer height Hp in the Z direction by using arc additive slicing software; step 2, a robot performs additive manufacturing according to an additive path code in step 1; step 3, after additive manufacturing in step 2 is completed, thesurface of an additive product is scanned through laser, the height H of actual additive material is obtained by using an image processing algorithm, the number N of the current additive layers is obtained from a slicing module, calculation is made according to the formula h2 = H / N to obtain the average height of the additive layers in step 2 during additive manufacturing, according to the heightH of actual additive manufacturing and the average height h2 of the additive layers, re-slicing is performed at the position, with the height of H, of the part model according to the height h2 of theadditive layers, and additive manufacturing programs of the next N layers are output; step4, step 2 and step 3 are repeated until part additive manufacturing is completed.

Description

technical field [0001] The invention relates to a metal arc additive manufacturing method, in particular to a method for improving the precision of metal arc additive manufacturing through laser tracking, and belongs to the technical field of metal welding processing. Background technique [0002] Arc additive manufacturing is a manufacturing method that melts and accumulates metal layer by layer to achieve the shape of the workpiece. The traditional arc additive process usually uses slicing software to slice and plan the digital model of the parts, and output the additive program at one time, and does not adjust the additive program during the additive process. Since the welding process is affected by many factors, the layer heights at different temperatures vary greatly. When the additive program is fixed, the error in the height direction will be superimposed layer by layer, and the larger the size of the manufactured part, the greater the error in the height direction. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/04
CPCB23K9/044
Inventor 吴玲珑迟科萌刘欣
Owner 南京衍构科技有限公司