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Clamping auxiliary forming device for two sides of molten pool in additive manufacturing process and method

A technology for additive manufacturing and molten pool, which is applied in the field of auxiliary forming devices for clamping both sides of the molten pool in the process of additive manufacturing, which can solve problems such as difficult application of width and size, and achieve the effect of improving dimensional accuracy.

Pending Publication Date: 2021-06-08
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the existing related research, in terms of forming accuracy, the Chinese patent CN108637504A proposes a device and method for rolling the top and side surfaces of the cladding layer for arc-filled wire additive manufacturing. The forming accuracy of the parts, but due to the large size of the equipment, its action position is far away from the molten pool, and its effect is different from imposing constraints on the semi-solidified metal area. In addition, one roller of the device can only correspond to a specific width size. Difficult to apply to occasions where the width needs to be adjusted flexibly

Method used

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  • Clamping auxiliary forming device for two sides of molten pool in additive manufacturing process and method
  • Clamping auxiliary forming device for two sides of molten pool in additive manufacturing process and method
  • Clamping auxiliary forming device for two sides of molten pool in additive manufacturing process and method

Examples

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Effect test

Embodiment 1

[0040] Take the unidirectional scanning method to manufacture a 316L stainless steel thin-walled part with a deposition layer width of 2mm as an example, such as figure 1 As shown, the coaxial powder feeding method is adopted, the heat source of laser deposition manufacturing is FCL-2000 semiconductor laser, and the GP-180 teaching robot is used to drive the laser deposition head to move, and the clamping parts are rollers. The specific steps are as follows:

[0041] Step 1: Polish the surface of the 316L stainless steel substrate with sandpaper to remove oil and impurities on the surface, and use absorbent cotton to soak in absolute ethanol, scrub the polished surface and wait for it to dry naturally, then place the substrate on the surface of the workbench. Sieve 316L powder in advance, place it in a vacuum drying oven, and dry it at 120°C for more than 2 hours, then place it in the powder feeder, turn on the power of the powder feeder and set its speed to 1.2 rpm. Set the p...

Embodiment 2

[0047] Take the unidirectional scanning method to manufacture TC4 thin-walled parts with a deposition layer width of 5mm as an example, such as figure 2 As shown, the heat source of laser deposition manufacturing is FCL-2000 fiber laser by means of coaxial shielding gas and lateral wire feeding, and the teaching manipulator GP-180 is controlled by the YRC-1000 control cabinet to drive the laser deposition head to move. The holding part is a clamping block, which specifically includes the following steps:

[0048] Step 1: Polish the surface of the TC4 substrate with sandpaper to remove surface attachments, and use absorbent cotton to soak in absolute ethanol, scrub the polished surface, and let it dry naturally. Place the substrate on the bench surface. Put the TC4 wire into the wire feeding device, turn on the power of the device and set the wire feeding speed to 200mm / min. Set the laser shielding gas flow rate to 8L / min. Turn on the laser and the water cooler, and set the...

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Abstract

The invention belongs to the technical field of additive manufacturing, and particularly relates to a clamping auxiliary forming device for two sides of a molten pool in an additive manufacturing process and a method. The device comprises additive manufacturing equipment, a connecting device and a clamping component; the connecting device is used for connecting the clamping component with the additive manufacturing equipment so as to adjust the relative position of the clamping component and an additive deposition head to ensure synchronous movement of the clamping component and the additive deposition head, the additive manufacturing equipment comprises the additive deposition head, an additive heat source, a gas cylinder, a feeding device, a feeding nozzle and a feeding nozzle connecting plate, and the feeding nozzle conveys additive manufacturing raw materials to a deposition position. According to the clamping auxiliary forming device for the two sides of the molten pool in the additive manufacturing process and the method, the device and method can be applied to the additive manufacturing processes of different deposition widths through the connecting device, and the surface flatness and the size precision in the width direction of the side wall of a deposition layer can be effectively improved through the clamping and restraining effect of the clamping component.

Description

technical field [0001] The invention belongs to the field of additive manufacturing, and in particular relates to an auxiliary forming device and method for clamping on both sides of a molten pool during the additive manufacturing process. Background technique [0002] Additive manufacturing technology refers to an advanced manufacturing technology based on the principle of discrete accumulation, driven by three-dimensional data of parts, and preparing workpieces by layer-by-layer accumulation. However, due to the unstable shape of the molten pool in the process of additive manufacturing, the parts have the problem of low wall thickness forming accuracy. [0003] In this regard, some scholars have proposed a composite additive manufacturing technology based on clamping constraints to solve the above problems. This technology can ensure the dimensional accuracy and surface quality of formed parts without removing materials. In the existing related research, in terms of formi...

Claims

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Application Information

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IPC IPC(8): B22F10/25B22F12/00B33Y30/00B33Y10/00
CPCB33Y10/00B33Y30/00
Inventor 吴东江朱玟旭于成水牛方勇马广义
Owner DALIAN UNIV OF TECH
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