Powder spreading device for additive manufacturing equipment

Abstract

The invention discloses a powder spreading device for additive manufacturing equipment. The powder spreading device comprises a feeding hopper, a mounting plate and powder discharging hoses; the mounting plate is installed at the bottom end of the feeding hopper, the feeding hopper comprises a two-way powder spreading device body, a reverser and an air cylinder, and the two-way powder spreading device body, the reverser and the air cylinder are all installed in the feeding hopper; and the reverser is installed at the bottom end of the feeding hopper, the two-way powder spreading device is installed at the top end of the reverser, and the air cylinder is installed at the top end of the two-way powder spreading device. The powder spreading device is installed on equipment through the mounting plate, rapid installation by workers is facilitated, the installation process is simple, and maintenance by the workers is facilitated; materials are extruded through the air cylinder, so that the materials are fully discharged; a powder laying route is conveniently replaced through the reverser; and a worker can be conveniently fixed on a positioning device through the powder discharging hosesto perform accurate powder laying operation.

Description

technical field [0001] The invention relates to the technical field of additive manufacturing, in particular to a powder spreading device for additive manufacturing equipment. Background technique [0002] As we all know, the existing laser additive manufacturing technology has become a research hotspot in the field of metal parts processing due to a series of advantages such as high flexibility, excellent product performance, and wide material adaptability. According to different process characteristics, laser additive manufacturing The technology can be divided into three types: synchronous feeding, preset powder coating, and combination of synchronous feeding and preset powder coating. Among them, the synchronous feeding laser additive manufacturing technology includes laser cladding deposition and laser wire feeding deposition. The coaxial feeding nozzle synchronously transports the metal powder / wire to the dynamic molten pool formed by laser beam irradiation to complete...

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Problems solved by technology

[0002] As we all know, the existing laser additive manufacturing technology has become a research hotspot in the field of metal parts processing due to a series of advantages such as high flexibility, excellent product performance, and wide material adaptability. According to different process characteristics, laser additive manufacturing The technology can be divided into three types: synchronous feeding, preset powder coating, and combination of synchronous feeding and preset powder coating. Among them, the synchronous feeding laser additive manufacturing technology includes laser cladding deposition and laser wire feeding deposition. The coaxial feeding nozzle synchronously transports the metal powder / wire to the dynamic molten pool formed by laser beam irradiation to complete the melting and solidification of the metal powder / wire. It has high forming efficiency, but it can only form simple shapes Products, pre-laid powder laser additive manufacturing technology mainly refers to laser selective melting, which uses a scraper to lay a layer of metal powder with a certain thickness on the substrate in advance, and then uses the scanning galvanometer to output the laser beam to achieve the selectivity of the powder layer Melting / solidification forming, this technology can form complex shape products, but the forming cylinder must be used to accommodate the substrate and the part above the substrate and the powder bed. A large amount of powder will bring a huge load to the mechanical moving parts of the equipment, greatly increasing the manufacturing difficulty and maintenance cost of the equipment

[0003] For example, the published patent "CN201621411388.5" is named "a powder spreading device". The powder spreading device includes a powder storage component, a selected area powder spreading component and an auxiliary moving component. When spreading powder, the powder storage component is used to spread powder for the selected area The component provides an appropriate amount of metal powder, and then the selective powder spreading component selectively lays metal powder at a specific position driven by the auxiliary moving component. The installation process of this device is relatively complicated and requires frequent maintenance, which increases the workload of the staff

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