Patent ID: 11951651
Assignee: NORTHWESTERN UNIVERSITY
Field: Other special machines (Mechanical engineering)
Classification: CPC B  G | IPC B

Claim 2:
3. The 3D printing method according to claim 1, wherein:
the servo control over the flow rate of the materials refers to that the 3D printing coupling control system obtains real-time flow state information of the materials in a conveying pipeline connected with the print heads through a pipeline pressure sensor and a material flow rate sensor; when a deviation between a monitoring value and a setting value of a current printing path is greater than a setting threshold, the 3D printing coupling control system actively adjusts a feeding speed of the feeding system; the matching between the traveling speed of the print heads and the flow rate of the materials refers to that the 3D printing coupling control system monitors and controls a rotational speed of a print head motor to achieve autonomous adjustment of the traveling speed of the print heads in XYZ directions, so that the traveling speed of the print heads and the discharging speed of the materials are within a preset matching interval; the temperature self-adaptive adjustment of the feeding system refers to that the 3D printing coupling control system monitors a temperature of the feeding system of a 3D printer through distributed temperature sensors, when the temperature of the feeding system exceeds a setting value and reaches an adjusting threshold, a temperature control system is started autonomously for cooling the feeding system; when the temperature of the feeding system is reduced to the setting value, the temperature control system stops working; when the temperature of the feeding system is lower than a setting value and reaches an adjusting threshold, the temperature control system is autonomously started for heating the feeding system; when the temperature of the feeding system is increased to the setting value, the temperature control system stops working; the cooperative work of the print heads refers to that different types of print heads with different pore diameters are selected for printing different subareas of the 3D digital model of the intact rock mass and the rock mass structure;
each of the print heads is provided with an independent feeding and print head running control system; and
the independent print heads cooperatively work according to the planned printing paths to complete overall printing of the geological model.