Coaxial powder feeding apparatus

Abstract

The invention discloses a coaxial powder feeding device which belongs to a supporting equipments of laser processing device. The invention is characterized in that a pressure reducer (2) is fixed on alaser beam protective barrel (1) through a bracket (208). A powder feeding pipe (6) is communicated with an adjustable powder feeding pipe (201) of the pressure reducer (2). A powder outlet at the lower end of the pressure reducer (2) is connected with a powder inlet (301) at the upper end of a powder dividing device (3) through a powder feeding pipe (7). Four powder outlets are divided at the lower end of the powder dividing device (3). The four powder outlets are connected with four powder inlets (503) of a coaxial powder feeding head (5) through a powder feeding pipe (8). The laser beam protective barrel (1) is connected with a protective barrel flange screw thread of an adjusting device (4). An upper cylinder flange of the adjusting device (4) is connected by screw thread with an upper cylinder of the coaxial powder feeding head (5). The invention has the advantages of adjustable powder feeding pressure, continuance and uniform powder feeding. Thereby, the effective utilization ratio is enhanced. A powder bundle ax and a laser beam ax are coincided. Thereby, the metal powder is sent into a laser molten pool accurately. The effective utilization ratio of powder is enhanced. A cooling water cavity ensures the effective cooling of the critical components of the coaxial powder feeding head, and leads the coaxial powder feeding head to have long and steady operation.

Description

technical field [0001] The invention relates to a coaxial powder feeding device, which belongs to a supporting device of laser processing equipment. It can be used for powder delivery of metal and non-metal laser cladding, surface alloying, repair of damaged parts and laser rapid prototyping of parts. Background technique [0002] Laser processing is a new type of material processing method that uses high-energy laser beams for processing. Laser processing has many advantages over conventional processing methods, and has a wide range of applications, such as: laser surface modification (laser phase transformation hardening, laser cladding, laser alloying, laser surface roughening), laser rapid prototyping, laser repair, Laser welding, laser cutting, laser drilling, laser marking, etc. Laser cladding, also known as laser cladding or laser cladding, is an important method of material surface modification technology. It uses high-energy laser beams to irradiate the surface of...

AI Technical Summary

Problems solved by technology

Powder needs to be conveyed in laser cladding, surface alloying, damaged parts repair and laser rapid prototyping of metal parts. At present, the commonly used coaxial powder feeding head has the following deficiencies: the coaxiality of the laser beam axis and the powder beam axis cannot be achieved. Fine-tuning, so that the metal powder cannot be accurately fed into the laser molten pool, thereby reducing the utilization rate of the metal powder and adversely affecting the process; in order to meet the long-distance powder feeding, the pressure of the powder-carrying gas used by the existing powder feeder Larger, it is easy to cause the powder to be blown away at the outlet of the powder feeding head, which also reduces the utilization rate of the metal powder and affects the production efficiency; the existing coaxial powder feeding nozzles mostly use the horizontal direction to send the powder into the powder feeding head, which is easy to Powder accumulation occurs at the entrance, resulting in uneven powder feeding; (4) The connecting parts of the existing coaxial powder feeding head are connected by threads. Since there are many pipelines such as powder, gas, and water on the coaxial powder feeding head, it is difficult to rotate the powder feeding head. All pipelines must be unplugged first, which is inconvenient to use

Images