A metal 3D printing device that reduces defects in molded parts

Abstract

A metal 3D printing device for reducing defects of molded parts, comprising a housing, a laser generator installed in the housing, a molding cylinder, a powder supply cylinder, a powder collecting cylinder and a powder spreading device, and a working platform is provided inside the housing, The forming cylinder is installed on the inner side of the working platform, the forming cylinder is surrounded by a first support plate, the upper end of the left and right working platforms is provided with a second support plate, and the upper end of the second support plate is fixedly connected with a top plate, so There is a mounting hole at the center of the inner side of the top plate, the laser generator is located at the upper end of the mounting hole, the left and right ends of the mounting hole are respectively provided with measuring holes, the upper end of the measuring hole on the left is provided with an infrared rangefinder, and the right end is provided with an infrared rangefinder. The upper end of the measuring hole is provided with a heat detector, the rear end of the forming cylinder is provided with a powder supply cylinder, the upper end of the powder supply cylinder is provided with a powder outlet groove, and the front end of the forming cylinder is provided with a powder collecting cylinder located at the lower end of the working platform. The upper end of the powder collecting cylinder is provided with a blanking chute opened on the working platform.

Description

technical field [0001] The invention relates to 3D printing equipment, in particular to a metal 3D printing equipment for reducing the defects of formed parts. Background technique [0002] SLM is a main technical approach in the additive manufacturing of metal materials. This technology uses laser as the energy source, and scans the metal powder bed layer by layer according to the planned path in the 3D CAD slice model. The scanned metal powder achieves the effect of metallurgical bonding through melting and solidification, and finally obtains the design of the model. For metal parts, in order to reduce the residual stress on the molded parts when the existing equipment is printing, the direction of the rotation scan vector is generally set by the program when moving from one processing layer to the next processing layer, but in actual application, the existing The existing equipment cannot rotate the appropriate scanning direction according to the structure of the molded ...

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problems existing in the above-mentioned prior art, and provides a metal 3D printing equipment that reduces the defects of molded parts. Vector, to reduce the residual stress on the molded parts, the flow rate and flow rate of the protective gas fed into the printing equipment can be adjusted according to the size of the sintered area during laser sintering, so as to avoid the waste of protective gas and avoid the partial area being oxidized to produce defects when forming parts

Images