Composite equal additive manufacturing method

Patent metadata

Field	Value
Publication number	US-11654479-B2
Application number	US-202217585729-A
Country	US
Kind code	B2
Filing date	Jan 27, 2022
Priority date	Jan 28, 2021
Publication date	May 23, 2023
Grant date	May 23, 2023

Abstract

A composite equal additive manufacturing method: S1, obtaining molten metal by using a metal smelting device; S2, first, storing inflow molten metal in an intermediate container, and then transferring the molten metal into a crystallizer; S3, cooling the molten metal to a solid-liquid mixed state by using the crystallizer, and enabling a high-temperature blank body with a required section to flow out from an outlet of the crystallizer; S4, arranging plastic forming tools at a bottom of the outlet of the crystallizer, and performing plastic forming on the outflow high-temperature blank body; S5, fixing a lower end of a part after the plastic forming and slowly descending the part by a chuck; S6, machining the part by using point forming machines, and synchronously controlling the machining temperature of the part; and S7, descending the chuck to an appropriate position, and taking the formed part out from the machine frame.

First claim

What is claimed is:

1. A composite equal additive manufacturing method, comprising the following steps:
S1, obtaining molten metal by using a metal smelting device;
S2, storing the molten metal flowing out from the metal smelting device in an intermediate container, and transferring the molten metal stored in the intermediate container into a crystallizer below through a gate when the molten metal flowing into the intermediate container meets a forming amount of a part to be formed;
S3, controlling the crystallizer to cool the molten metal from a liquid state to a solid-liquid mixed state, and enabling a blank body with a required section to flow out from an outlet of the crystallizer;
S4, arranging one or more pairs of plastic forming tools at a bottom of the outlet of the crystallizer, and performing hot machining on the blank body with fluidity by the one or more pairs of plastic forming tools;
S5, enabling the blank body after plastic forming to descend under an action of self gravity, wherein a chuck is used for clamping and fixing a lower end of a cooled and solidified blank body, and the blank body that is fixed descends along a guide sleeve on a machine frame;
S6, performing local machining or finishing on the blank body on the chuck after the plastic forming by using one or more point forming machines, and simultaneously, adjusting and controlling a temperature of a machining part by using a temperature control device, so as to obtain a formed part with a locally deformed structure; and
S7, after the formed part is formed, supporting the formed part by the chuck, enabling the formed part to descend to a bottom of the machine frame, and taking the formed part out from the machine frame.

2. The composite equal additive manufacturing method according to claim 1 , wherein, in S1, one electrode of a power supply in an electroslag remelting furnace is directly placed in a slag pool, a hole is formed in a bottom of the slag pool, and the molten metal flows out from the hole in the bottom of the slag pool.

3. The composite equal additive manufacturing method according to claim 1 , wherein in S2, the intermediate container is used for storing the molten metal and controlling a speed of the molten metal flowing into the crystallizer.

4. The composite equal additive manufacturing method according to claim 1 , wherein the crystallizer is of a hollow axisymmetric structure or a hollow non-axisymmetric structure.

5. The composite equal additive manufacturing method according to claim 1 , wherein in S4, the one or more pairs of plastic forming tools are one or more pairs of rolls; each pair of rolls comprises an inner roll and an outer roll; the inner roll rotates around a mandrel through a bearing; and the outer roll is placed in a disc fixed by the guide sleeve and rotates around the mandrel in a disc groove.

6. The composite equal additive manufacturing method according to claim 1 , wherein in S5, a periphery of the chuck is connected to a sliding guide sleeve; and the sliding guide sleeve is assembled on a guide rod of the machine frame and is able to move up and down along the guide rod of the machine frame.

7. The composite equal additive manufacturing method according to claim 1 , wherein the point forming machine comprises an inner point forming machine and an outer point forming machine, in S6, the inner point forming machine is able to rotate along a mandrel and is able to stretch and retract relative to the guide sleeve on the mandrel; the outer point forming machine is placed in a disc fixed by the guide sleeve and rotates around the mandrel in a disc groove; and the inner point forming machine and the outer point forming machine are used for machining a local structure on the blank body.

8. The composite equal additive manufacturing method according to claim 7 , wherein the temperature control device is installed on or near a machining head of the point forming machine; and the temperature control device is used for adjusting and controlling the temperature of the machining part.

Assignees

• Univ Huazhong Science Tech

Inventors

• Zhang Hai'Ou
• Huang Jianwu
• Wang Guilan

Classifications

• B22D11/0406

  Moulds with special profile · CPC title

• B21B1/463 Primary

  in a continuous process, i.e. the cast not being cut before rolling · CPC title

• B22D11/006 Primary

  of tubes · CPC title

• B33Y40/20

  Post-treatment, e.g. curing, coating or polishing · CPC title

• C22B9/18

  Electroslag remelting {(electroslag casting B22D23/10)} · CPC title