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Electric arc additive and electric auxiliary ultrasonic impact reinforcing composite manufacturing method and device

A technology of ultrasonic impact and manufacturing method, applied in the direction of manufacturing tools, additive processing, arc welding equipment, etc., can solve the problems of limited improvement, large deformation resistance, impact deformation and limited depth of residual compressive stress layer, etc. The effect of reducing heat generation and improving safety

Inactive Publication Date: 2019-04-16
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for some metal materials with high strength and low plasticity at room temperature, such as titanium alloys and superalloys, the deformation resistance of ultrasonic shock process at room temperature is large, and the depth of impact deformation and residual compressive stress layer is limited. The improvement effect is limited, and at the same time, higher requirements are put forward for the load and stability of the ultrasonic shock equipment

Method used

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  • Electric arc additive and electric auxiliary ultrasonic impact reinforcing composite manufacturing method and device
  • Electric arc additive and electric auxiliary ultrasonic impact reinforcing composite manufacturing method and device
  • Electric arc additive and electric auxiliary ultrasonic impact reinforcing composite manufacturing method and device

Examples

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Effect test

Embodiment 1

[0033] In this embodiment, the substrate is Inconel 718 superalloy rolled plate with a size of 300mm×50mm×4mm. The welding wire is Inconel 718 superalloy welding wire with a diameter of 1mm, and plasma welding is adopted. The specific implementation steps are as follows:

[0034] 1) Clean the surface of the superalloy substrate 5 with an alkaline solution to remove oil stains, polish the surface of the substrate 5 to remove the oxide film, and clean the surface with an acetone reagent.

[0035] 2) Insert an insulating gasket 4 with a size larger than the substrate 5 between the substrate 5 and the worktable 2; insert insulating gaskets 7 and 19 between the substrate 5 and the left and right clamps 8 and 18, and pass the left and right clamps 8 and 18. 18 is fixed; the insulating gasket 11-4 is inserted at the position where the horn 11-3 is in contact with the clamping handle 11-5.

[0036] 3) The two electrodes 6 and 20 are respectively connected to the left and right sides o...

Embodiment 2

[0043] The ultrasonic impact device 11 of the present invention can also be assembled and used through the cooperative control of the robot 22, such as image 3 , because the robot 22 can realize complex spatial curved surface activities, has higher flexibility and motion precision, and can form parts with higher complexity. A clamping device 21 is added at the end of the multi-joint robot 22 for clamping the ultrasonic impact device 11 . According to the characteristics and dimensions of the formed parts, the computer 24 slices the three-dimensional part features to obtain the best path, generates the path trajectory, and transmits the instructions of the computer 24 to the controller 23, and then controls the multi-joint robot 22 to change the posture, and enters the Ultrasonic impact strengthens the initial position. After the arc additive is completed, the DC pulse power supply 3 is used to heat the specified forming temperature, the ultrasonic generator 10 is turned on, a...

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Abstract

The invention relates to an electric arc additive and electric auxiliary ultrasonic impact reinforcing composite manufacturing method and device. The method is characterized in that an electric arc isused for melting a metal wire material; after the wire material is settled on a base sheet by one or more layers through a welding gun and a wire feeding mechanism, the base sheet and the settled layer are heated through a direct-current pulse power supply; and the temperature of the surface of the settled layer is acquired by a temperature sensor, and an ultrasonic impact device is used for carrying out ultrasonic impact on the surface of the settled layer when the temperature reaches a preset value. The device comprises the base sheet, a clamp, a workbench, the welding gun, the wire feedingmechanism, the temperature sensor, an ultrasonic generator, the ultrasonic impact device, an electrode, a wire, the direct-current pulse power supply and an insulating spacer. According to the method, pulse current auxiliary heating, ultrasonic impact reinforcing and an electric arc additive process are organically combined, the multi-field coupling effect of electricity, heat, sound and force isused for improving the forming precision of the settled layer and refining the grain size, so that the defects such as air holes and cracks and internal residual tensile stress generated in the electric arc additive process are eliminated, and the mechanical property of material is improved.

Description

technical field [0001] The invention relates to an additive manufacturing method and device, in particular to a composite manufacturing method and device for arc additive and electric-assisted ultrasonic impact strengthening. Background technique [0002] Arc additive manufacturing is an advanced digital manufacturing technology that uses an arc as a heat source, adopts the principle of layer-by-layer deposition, and welds the molten wire layer by layer, and gradually forms metal parts from line-surface-body according to the three-dimensional digital model. Compared with laser and electron beam additive manufacturing, the arc additive manufacturing technology melts the wire through the arc, the deposition speed is fast, the manufacturing efficiency is high, the material utilization rate is significantly improved, and the equipment manufacturing cost is low. It has broad application prospects in the low-cost, high-efficiency, and rapid prototyping of structural parts with com...

Claims

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Application Information

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IPC IPC(8): B23K9/04C21D10/00B23P15/00B33Y30/00B33Y10/00
CPCB23K9/042B23P15/00B33Y10/00B33Y30/00C21D10/00
Inventor 张涛沙华浦李磊鲁世红李正芳章珈彬陈鹏
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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