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Metal cold-welding additive manufacturing method

A technology of additive manufacturing and cold welding, which is applied in the field of metal cold welding additive manufacturing, can solve the problems of large grain structure and difficult path planning, and achieve the effect of small grain structure, convenient forming quality and high precision

Active Publication Date: 2017-08-04
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a method for metal cold welding additive manufacturing in order to solve the problems existing in the above-mentioned prior art, which solves the problems of heat input, thermal deformation, thermal stress, and grain structure in the process of metal additive manufacturing. Yamato Path Planning Difficulty Problem

Method used

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Experimental program
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Effect test

Embodiment 1

[0035] Such as image 3 Shown: the outer diameter 20mm of titanium ring, height 4mm, wall thickness 2mm, be formed by surfacing welding of 80 layers of ring parts, the height of every layer of ring parts is 0.2mm; The concrete steps of its manufacturing method are:

[0036] Step 1: Carry out 3D modeling of the titanium metal ring on the main control computer, carry out layering processing on the titanium metal ring, obtain the size and shape characteristics of each layer, and then plan the moving path of the welding torch and select its Welding process parameters, where the pulse current is 50-100A, the diameter of the welding wire is 0.5mm Ti5Al2.5Sn, the wire feeding speed is 0.1m / min-0.2m / min, and the welding speed is 0.2mm / s-0.5mm / s, the weld width is 0.2-2mm;

[0037]Step 2: Establish the corresponding weld model for the layer through the welding process parameters and the planned moving path of each weld selected above; The three-dimensional model of the layer is used...

Embodiment 2

[0041] Such as Figure 4 Shown: the height of double helix titanium metal post is 20mm, the diameter of single helix titanium metal post is 1.5mm, and the maximum spacing between two single helix titanium metal posts is 5mm; The specific steps of its manufacturing method are:

[0042] Step 1: Carry out 3D modeling on the double-helix titanium metal column on the main control computer, process the double-helix titanium metal column in layers, obtain the size and shape characteristics of each layer, and then plan the moving path of the welding torch and Select its welding process parameters, wherein, the pulse current is 30-40A, and the diameter of the welding wire is 0.3mm TC4 titanium alloy welding wire, wherein, there are 4-6 parts of Al, 2.5-4 Part V, 0.01-0.02 part C, 0.1-0.2 part O and 0.003-0.005 part N, the rest is Ti, the wire feeding speed is 0.1m / min-0.2m / min, the welding speed is 0.2mm / s- 0.3mm / s, the weld width is 0.5-1.5mm;

[0043] Step 2: Establish the correspo...

Embodiment 3

[0047] Such as Figure 5 Shown: the height of titanium metal miniature tower is 2.5mm, and the side length of its bottom square is 2.5mm; The concrete steps of its manufacturing method are:

[0048] Step 1: Carry out 3D modeling of the titanium miniature tower on the main control computer, process it in layers, obtain the size and shape characteristics of each layer, and then plan the moving path of the welding torch and select its welding process parameters , where the pulse current is 40-60A, the diameter of the welding wire is 0.4mm titanium alloy welding wire, the wire feeding speed is 0.1m / min-0.2m / min, and the welding speed is 0.2mm / s-0.4mm / s, Weld width is 0.5-1.5mm;

[0049] Step 2: Establish the corresponding weld model for the layer through the welding process parameters and the planned moving path of each weld selected above; The three-dimensional model of the layer is used to obtain the size of the weld and the build-up layer; compare the size of the build-up lay...

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Abstract

The invention provides a metal cold-welding additive manufacturing method. The method includes the steps that firstly, a part is subjected to 3D modeling on a main control computer, then the part is subjected to layered processing, the size and shape characteristics of each layer are obtained, a movement route is planed, welding technological parameters are selected, then a corresponding welding seam model of the part and a three-dimensional model of stacked layers are established, and the welding seam size and the stacked-layer forming size are obtained; the stacked-layer forming size is compared with the size of each layer, and then the bead weld route and the welding technological parameters are optimized and selected again; the main control computer inputs the bead weld route and the welding technological parameters into a welding machine, a wire feeder, a mechanical arm and positioning equipment; then a high-energy pulse precise cold-welding technology is adopted to perform interrupted spot welding, a spot weld is added to each pulse period, cooling for heat dissipation is performed during each pulse interval, and it is guaranteed that a base body is at a normal temperature state; and the part is formed by stacking interrupted spot welds point by point, line by line and layer by layer, and the problems that the heat input quantity, heat deformation and a grain structure are large, and it is difficult to plan the route in the manufacturing process are avoided.

Description

technical field [0001] The invention relates to the field of part forming and manufacturing, in particular to a method for metal cold welding additive manufacturing. Background technique [0002] Additive manufacturing technology is a digital manufacturing technology that directly manufactures physical parts based on the principle of discrete accumulation, according to the three-dimensional digital model of the part, and adopts the method of accumulating materials layer by layer, also known as "3D printing technology". The advantage of this method is that free forming can be realized without traditional cutting tools, the production process and manufacturing cycle are reduced, and it is suitable for the manufacture of low-cost and small-batch products, especially for the manufacture of products with complex structures and high added value of raw materials. Early rapid prototyping, 3D printing, and solid free manufacturing technology were mainly non-metallic prototype or mode...

Claims

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Application Information

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IPC IPC(8): B23K9/04B23K9/167B23K9/12
CPCB23K9/04B23K9/12B23K9/167
Inventor 韩红彪郭敬迪焦文清陈俊潮隋新司东宏薛玉君李济顺
Owner HENAN UNIV OF SCI & TECH
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