Device for improving powder laying quality in metal powder bed additive manufacturing process

Abstract

The invention discloses a device for improving the powder laying quality in the metal powder bed additive manufacturing process, and belongs to the field of additive manufacturing. The device comprises a supporting base, a lead screw nut, a rolling cylinder, a support, a lifting mechanism, a ball screw and a stepping motor, wherein the supporting base is fixed to a powder laying mechanism of a metal powder bed additive manufacturing device; the stepping motor is located at the upper end of the supporting base, connected with one end of the ball screw through a gear and used for driving the ball screw to rotate; the lead screw nut is in threaded connection with the ball screw and is used for moving up and down when the ball screw rotates; the lifting mechanism is fixedly connected with thelead screw nut and used for moving up and down under driving of the lead screw nut; and the rolling cylinder is fixedly connected with the lifting mechanism through the support and used for moving under driving of the lifting mechanism, so that the pressing force of the rolling cylinder on a powder layer is adjusted. According to the device for improving the powder laying quality in the metal powder bed additive manufacturing process, a powder pile is finally rolled by adjusting the pressing force, so that gaps of powder particles are reduced, and the filling density in the powder laying process is improved.

Description

technical field [0001] The invention belongs to the field of additive manufacturing, and more specifically relates to a device for improving the powder laying quality of a metal powder bed additive manufacturing process. Background technique [0002] In recent years, metal powder bed additive manufacturing technologies, such as laser selective melting technology and electron beam selective melting technology, have attracted extensive attention from academia and industry at home and abroad due to their great application prospects. However, the performance and accuracy of metal powder bed additive manufacturing parts are currently unstable, which seriously hinders its wide application in industry. There are many factors affecting the performance and precision of parts in the process of metal powder bed additive manufacturing, among which the quality of powder coating is one of the important influencing factors. The quality of powder spreading includes the compactness of the p...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the above defects or improvement needs of the prior art, the present invention provides a device for improving the powder coating quality in the metal powder bed additive manufacturing process, thereby solving the problem of poor powder coating quality in the existing metal powder bed additive manufacturing technology. technical problem

Images