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Magnetic field control type electric arc robot additive manufacturing method

An arc robot and additive manufacturing technology, which is applied in the direction of manufacturing tools, arc welding equipment, welding equipment, etc., to achieve the effects of improving control accuracy, homogenizing elements, and improving the accuracy of additive molding

Inactive Publication Date: 2019-01-04
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of arc additive forming accuracy, the present invention provides a magnetic field controlled arc robot additive manufacturing method

Method used

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  • Magnetic field control type electric arc robot additive manufacturing method
  • Magnetic field control type electric arc robot additive manufacturing method
  • Magnetic field control type electric arc robot additive manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Take the model ER130S-G high-strength steel welding wire with a diameter of 1.2mm and a 6mm thick 304 stainless steel substrate stacking straight wall as an example. The specific steps are:

[0037] S1: Clean the surface of the 304 stainless steel substrate, remove surface impurities and oxides, open the protective gas cylinder, and prepare for the arc additive;

[0038] S2: Determine the welding process parameters. In this example, the wire feeding speed is set to 7.2mm / min, and the welding speed is set to 11mm / s;

[0039] S3: Adjust the distance between the excitation coil and the workpiece. In this example, the distance between the excitation coil and the workpiece is set to 20mm;

[0040] S4: Adjust the magnitude of the excitation current. In this example, the excitation current is set to 1A;

[0041] S5: Adjust the frequency of the magnetic field. In this example, the frequency of the magnetic field is set to 10Hz;

[0042] S6: Import the three-dimensional soli...

Embodiment 2

[0048]Take the model ER130S-G high-strength steel welding wire with a diameter of 1.2mm and a 6mm-thick 304 stainless steel substrate with a straight wall as an example. The specific steps are:

[0049] S1: Clean the surface of the 304 stainless steel substrate, remove the surface debris and oxides, open the protective gas cylinder, and prepare for the arc additive;

[0050] S2: Determine the welding process parameters. In this example, the wire feeding speed is set to 7mm / min, and the welding speed is set to 10mm / s;

[0051] S3: Adjust the distance between the excitation coil and the workpiece. In this example, the distance between the excitation coil and the workpiece is set to 15mm;

[0052] S4: Adjust the size of the excitation current. In this example, the excitation current is set to 1.5A;

[0053] S5: Adjust the frequency of the magnetic field, in this example, the frequency of the magnetic field is set to 15Hz;

[0054] S6: The three-dimensional solid part model di...

Embodiment 3

[0060] Taking the model ER130S-G high-strength steel welding wire with a diameter of 1.2mm and a 6mm-thick 304 stainless steel substrate stacking block as an example, the specific steps are:

[0061] S1: Clean the surface of the 304 stainless steel substrate, remove the surface debris and oxides, open the protective gas cylinder, and prepare for the arc additive;

[0062] S2: Determine the welding process parameters. In this example, the wire feeding speed is set to 7.5mm / min, and the welding speed is set to 12mm / s;

[0063] S3: Adjust the distance between the excitation coil and the workpiece. In this example, the distance between the excitation coil and the workpiece is set to 25mm;

[0064] S4: Adjust the size of the excitation current. In this example, the excitation current is set to 2.5A;

[0065] S5: Adjust the frequency of the magnetic field, in this example, the frequency of the magnetic field is set to 20Hz;

[0066] S6: The three-dimensional solid part model diag...

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Abstract

The invention provides a magnetic field control type electric arc robot additive manufacturing method. The method includes the steps that an excitation power supply is switched on, a welding gun movesto an arcing point according to a set program to conduct arcing, a welding robot moves according to a preset track, a longitudinal magnetic field is applied to the end portion of the welding gun, molten welding wires are stacked at an assigned position, and a control system controls a wire feeding mechanism to convey the welding wires into a melting area according to the assigned speed at the same time; the welding gun is elevated by one floor height in the height direction, and melting and stacking of the next layer are conducted; and depositing and piling of workpieces are completed. According to the magnetic field control type electric arc robot additive manufacturing method, by means of the external longitudinal magnetic field, the electric arc form is changed, the molten drop fallingprocess is controlled and the shape of a molten pool is constrained, and the forming precision is improved; and meanwhile, the externally-added longitudinal magnetic field has a stirring effect for the molten pool, elements of the molten pool can be uniform, and crystalline grains can be refined. The forming precision and quality of added components are improved.

Description

technical field [0001] The invention relates to the technical field of arc additive manufacturing, in particular to a magnetic field controlled arc robot additive manufacturing forming method. Background technique [0002] In the field of additive manufacturing technology, among the existing metal additive manufacturing methods, the two most commonly used methods are laser additive and arc additive. Both have their pros and cons. The main advantage of laser additives is high molding precision, and the finished product can be put into use directly; its disadvantages are high cost and low additive efficiency. The main advantages of arc additives are low cost and high droplet deposition efficiency; the disadvantages are that the forming accuracy of components is not high, and the large heat input leads to large thermal deformation of thermal components. [0003] With the continuous development of the electromagnetic process of materials, introducing a magnetic field into the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/04B23K9/08B23K9/095
CPCB23K9/04B23K9/08B23K9/095
Inventor 王克鸿许雪宗范霁康周明康承飞
Owner NANJING UNIV OF SCI & TECH
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