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An arc material additive device and method with adjustable feeding direction

An arc and feeding technology, applied in the field of additive manufacturing, can solve problems such as increasing the complexity of forming, control system, and restricting promotion, so as to improve forming stability and organizational uniformity, improve stability and consistency, and improve mechanics. performance effect

Active Publication Date: 2019-12-20
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the non-coaxiality of the plasma arc and the wire, the paraxial wire feeding method needs to highly rely on the walking mechanism to maintain the relative position between the wire feeding direction and the deposition direction when forming parts with nonlinear contours, which often increases the forming, The complexity of the control system limits the promotion of this technology

Method used

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  • An arc material additive device and method with adjustable feeding direction
  • An arc material additive device and method with adjustable feeding direction
  • An arc material additive device and method with adjustable feeding direction

Examples

Experimental program
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Embodiment 1

[0048] In this embodiment, the present invention is described by taking a stainless steel cylinder as an example, as image 3 As shown, the stainless steel cylinder is 120mm high, 60mm wall thickness, and 50mm inner diameter. It is composed of 40 deposited layers, each layer is 3mm in height, and each layer is composed of 10 filler metals. Additive process parameters: The welding wire adopts ER316L austenitic stainless steel welding wire with a diameter of 1.6mm, adopts DC positive connection, arc current is 147A, arc voltage is 14.2V, wire feeding speed is 6m / min, deposition speed is 0.6m / min; traveling mechanism 5 Drive the circular guide rail 2 and the welding torch 1 below the circular guide rail 2 to make a circular motion to realize the deposition of the circular trajectory, the rotation speed is 6r / min; the distance between the tungsten electrode and the substrate is 8mm, and the distance between the tungsten electrode and the filling material is 5mm; The three-dimensio...

Embodiment 2

[0058] This embodiment takes the titanium alloy curved wall as an example to illustrate the present invention, as Figure 5 As shown, the titanium alloy curved wall is 65mm high, composed of two semicircles with a radius of 50mm, and a wall thickness of 10mm. It is composed of 50 deposited layers, each layer is 1.3mm in height, and each layer is composed of a filler metal. Additive process parameters: the welding wire adopts TC with a diameter of 1.2mm 4 Titanium alloy welding wire adopts direct current connection, arc current is 160A, arc voltage is 21V, wire feeding speed is 4m / min, deposition speed is 0.3m / min; the distance between tungsten electrode and substrate is 5mm, and the distance between tungsten electrode and filling material The three-dimensional adjustment mechanism rotates at a small angle under the control of the computer to keep the welding wire alternately reciprocating scanning along the tangential direction of the deposition path. Argon is used as the arc ...

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Abstract

The invention belongs to the technical field of additive manufacturing and specifically discloses a feeding direction adjustable arc additive device and method. The device comprises a circumferentialadjusting mechanism, a wire feeding mechanism and a welding gun, the circumferential adjusting mechanism includes a circumferential guide rail and a three-dimensional adjusting mechanism matched withthe circumferential guide rail slidably, a wire guiding nipple is arranged on the three-dimensional adjusting mechanism, and the three-dimensional adjusting mechanism and the wire guiding nipple can rotate by 360 degrees along the circumferential guiding rail to adjust the wire feeding direction of welding wires to be tangent to the deposition path of additives; the wire feeding mechanism is mounted on the circumferential guiding rail, and the welding gun is coaxially arranged with the circumferential guiding rail and is located right above the same. In the method, the feeding direction adjustable arc additive device is adopted for arc additive manufacturing, and the wire guiding nipple can rotate by 360 degrees during additive manufacturing to ensure feeding the wires tangentially and uniformly along the scanning path. By the arrangement, the problem of inconsistency between the direction of deposition and the direction of material filling in the forming of parts with nonlinear profile in the manufacturing of side-shaft feed additives can be effectively solved.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, and more specifically relates to an arc additive device and method with adjustable feeding direction. Background technique [0002] The arc additive manufacturing technology uses the arc as the heat source to manufacture metal parts by layer-by-layer surfacing welding. Its main application goal is the low-cost, high-efficiency and rapid near-net shape of large-scale and complex components. According to different wire feeding methods, arc additive manufacturing can be divided into two types: coaxial wire feeding (MIG arc, CMT arc, etc.) additive manufacturing and side-axis wire feeding (TIG arc, plasma arc, etc.) additive manufacturing. [0003] Although the coaxial wire feeding method has high forming efficiency, it is difficult to accurately control the arc stability during the deposition process, and problems such as overflow and collapse of the molten pool are prone to occur, wh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K37/00B23K9/04B23K9/167B23K9/133
CPCB23K9/044B23K9/133B23K9/167B23K10/027B23K37/00
Inventor 高明龚梦成曾晓雁
Owner HUAZHONG UNIV OF SCI & TECH
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