Angle-adjustable four-pipe powder feeding nozzle for laser direct forming

Abstract

The invention discloses an angle-adjustable four-pipe powder feeding nozzle for laser direct forming, which comprises an upper portion, a middle portion and a lower portion, wherein the upper portion comprises an upper connecting sleeve and a protective glass decontamination nozzle, the middle portion comprises a sliding sleeve, a powder defocus adjusting nut, a locking sleeve and a central adjusting device, and the lower portion comprises a conical laser sleeve, a powder spraying pipe and a powder spraying pipe rail frame. The angle-adjustable four-pipe powder feeding nozzle is characterized in that the powder spraying pipe is capable of sliding on the powder spraying pipe rail frame so that the injection angle of powder can be continuously adjusted, positive and negative defocus values of powder collection points can be continuously adjusted by means of vertical movement of the sliding sleeve, and coaxiality of laser and powder can be adjusted by a coaxiality adjusting device. The nozzle not only can be used as a coaxial powder feeding nozzle, but also can be used as a paraxial powder feeding nozzle, the inner surface of a powder spraying pipe hole is extremely smooth and as smooth as a mirror surface, and collectability of the powder is improved.

Description

technical field [0001] The invention belongs to the application field of laser processing, and can be used for metal and non-metal laser cladding, surface alloying, repairing of damaged parts, etc., and specifically relates to a laser metal direct forming device. Background technique [0002] Laser Metal Direct Forming (LMDF) technology is a flexible advanced manufacturing technology developed based on rapid prototyping technology and laser cladding technology. This technology integrates the advantages of laser cladding technology and rapid prototyping technology, and can directly manufacture fully dense three-dimensional solid metal parts with complex shapes and good mechanical properties. It has the advantages of fast manufacturing speed, short production cycle and low cost. It is especially suitable for special materials or metal parts with special shapes that are difficult to manufacture by traditional methods. [0003] The factors affecting the laser metal direct formi...

AI Technical Summary

Problems solved by technology

Tsinghua University adopts a split laser cladding coaxial powder feeding nozzle (CN 1255411A) with vertical loading and unloading, Huazhong University of Science and Technology discloses a built-in laser cladding nozzle (CN1570190A), and South China University of Technology has developed a ring-type coaxial laser cladding nozzle Nozzle (CN 2707772Y) and hole-type coaxial laser cladding nozzle (CN 2707773Y), the structure of this type of powder feeding nozzle is basically similar, the main disadvantage is that the structure is too complicated, the uniformity of the powder flow at the nozzle outlet is relatively poor, easy to Divergence, low powder utilization rate, and the nozzle itself does not have the ability to adjust the powder incident angle

Images