3D printer printing platform leveling method based on chasing method and hydraulic automatic leveling system

Abstract

The invention discloses a 3D printer printing platform leveling method based on a chasing method and a hydraulic automatic leveling system. The 3D printer printing platform leveling method based on the chasing method and the hydraulic automatic leveling system are used for a large forming-breadth 3D printer. A printing head moves in the directions of an X axis, a Y axis and a Z axis; a distance measuring sensor and the printing head are installed on the same horizontal height, and the distance measuring sensor moves along with the printing head; a measured value of the distance measuring sensor is used for reflecting the relative positions of the printing head and a printing platform; the printing platform and a piston rod of a hydraulic cylinder are connected in the manner of a spherical hinge; the piston rod of the hydraulic cylinder is connected with a fixed supporting frame in the same manner of a spherical hinge; and the displacement of a valve element of a fluid electric proportional direction control valve controls lifting of a piston of the hydraulic cylinder to complete the automatic leveling process of the printing platform. The data output end of the distance measuring sensor is connected with the data input end of a controller, and the data output end of the controller is connected with the fluid electric proportional direction control valve. By means of cooperation of the hydraulic system and the controller, fast, accurate and automatic leveling of the printing platform is completed, the leveling workload of the platform is greatly reduced, and the printing precision is improved.

Description

technical field [0001] The invention relates to a method for leveling a printing platform of a 3D printer based on a chasing method and a hydraulic automatic leveling system. The device includes mechanical structural components of the 3D printer, hydraulic circuit design and a leveling method. The invention belongs to the field of 3D printing rapid prototyping (rapid additive manufacturing technology). Background technique [0002] 3D printing technology, also known as additive manufacturing technology, is different from subtractive manufacturing and equal material manufacturing technology. It is based on three-dimensional model data, and uses the computer to obtain the section data of the model, and processes the entity layer by layer according to the slice data, thus eliminating the need for traditional manufacturing. Drawing drawing, process implementation, mold manufacturing and other links in the method achieve the purpose of shortening the design time, emphasizing indi...

AI Technical Summary

Problems solved by technology

Among these factors, the state of the printing platform will directly affect the printing accuracy. If the printing platform is not level, it will cause uneven spinning of the printing head.

When the distance between the printing platform and the printing head is too small, the printing head cannot smoothly discharge the wire, and the problem of wire blocking of the printing head is easy to occur. If the printing head is blocked, the printing work must be stopped, and certain measures should be taken to deal with the wire feeding , because the diameter of the print head is very small, the work of feeding the wire is more complicated, and in severe cases, the print head must be replaced; when the distance between the printing platform and the print head is too large, the bonding force between the filaments extruded by the print head Not enough, even the extruded filament cannot be bonded to the printing platform when printing the base layer, so that the model is forced to be in a suspended printing state, which will undoubtedly lead to printing failure

In addition, when the printing platform is large, it will be very troublesome to manually adjust the printing platform, and it is difficult to achieve the ideal state. It is difficult to adjust the flatness accuracy and horizontal accuracy of the printing platform to reach the allowable error range

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