Automatically adjustable and controllable scraper system and control method thereof

Abstract

The invention discloses a scraper system capable of being automatically adjusted and controlled and a control method thereof. The scraper system comprises a scraper frame, a scraper fixing frame, a pressure sensor, a height adjusting device and a control module. A scraper fixing frame is arranged below the scraper frame, a first threaded counter bore and a second threaded counter bore are formed in the two ends, perpendicular to the powder laying direction, of the top of the scraper fixing frame, and correspondingly, sensor through holes and adjusting through holes are formed in the two ends, perpendicular to the powder laying direction, of the scraper frame. The pressure sensor penetrates through the sensor through hole to be connected with the scraper fixing frame, and the height adjusting device penetrates through the adjusting through hole to be connected with the scraper fixing frame. The pressure sensors are connected with the control module, and the control module is used for receiving electric signals of the pressure sensors of all the point positions, converting pressure values of all the point positions, comparing and calculating the pressure values with balance pressure values of the scraper fixing frame, and adjusting the pressure values of all the point positions through the height adjusting device till the pressure values reach the balance pressure values. The scraper can be adjusted in time, the hidden danger of equipment damage is avoided, the scraper adjusting time is shortened, and the equipment working efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of selective laser melting equipment, and in particular relates to an automatically adjustable and controllable scraper system and a control method thereof. Background technique [0002] Powder coating of laser selective melting equipment is an important part of the 3D printing process. The metal powder is spread flat on the substrate. The flatness and precision of the powder on the substrate have high requirements. The flatness will affect the thickness of single-layer printing. The uneven thickness over time will cause the final height of the printed part to not meet the requirements. Therefore, the powder laying accuracy directly affects the printing quality. If there is a local lack of powder, repeated printing will occur, resulting in repeated sintering in local areas, which will lead to thermal stress concentration, making it possible to have printing defects such as cracking and warping. [0003] Par...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems existing in the prior art, the present invention provides an automatically adjustable and controllable scraper system and its control method. The system can solve the problem that the scraper cannot be adjusted adaptively. When the scraper is in contact with the printing part, The servo motor can respond within 0.01S and adjust the scraper in time. The reaction speed is fast, and it can be avoided at the first time, avoiding the hidden danger of equipment damage, reducing the time for adjusting the scraper, and improving the working efficiency of the equipment; and the system is confirming the situation. Afterwards, an alarm can be issued without personnel searching for photos or monitoring, which solves the problem of equipment alarm information

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