A device for improving the quality of powder coating in metal powder bed additive manufacturing process

Abstract

The invention discloses a device for improving the powder spreading quality of a metal powder bed additive manufacturing process, which belongs to the field of additive manufacturing and includes: a support base, a screw nut, a rolling cylinder, a bracket, a lifting mechanism, a ball screw, a step Into the motor; the support base is fixed on the powder spreading mechanism of the metal powder bed additive manufacturing equipment; the stepper motor is located on the upper end of the support base, and is connected with one end of the ball screw through a gear to drive the ball screw to rotate; the screw nut Threaded connection with the ball screw, used to move up and down when the ball screw rotates; the lifting mechanism is fixedly connected with the screw nut, used to move up and down driven by the screw nut; the rolling cylinder passes through the bracket and lifts The mechanism is fixedly connected, and is used to move under the drive of the lifting mechanism, so as to adjust the pressing force of the rolling cylinder on the powder layer. The present invention finally realizes the rolling of the powder pile by adjusting the compacting force, thereby reducing the gap between the powder particles and increasing the filler density in the powder spreading process.

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...

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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

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