Cylindrical 6D printing system based on four-degrees-of-freedom parallel mechanism

Abstract

The invention discloses a cylindrical 6D printing system based on a four-degrees-of-freedom parallel mechanism. The system comprises the 4-SPS / PS parallel mechanism and a cylindrical barrel. The cylindrical barrel is movably connected with a base of a printer, a spiral line-shaped track is evenly arranged on the thin wall of the inner side of the cylindrical barrel, one end of a sliding base is located in the spiral track, the other end of the sliding base is connected with a ball screw base, the ball screw base is provided with a ball screw, one end of a connection plate is installed on the ball screw, a servo motor drives the ball screw to rotate so as to drive the connection plate to move along a guide rail on the ball screw base, the other end of the connection plate is connected witha nozzle, the connection plate drives the nozzle to move in the radial direction of the cylindrical barrel, the base of the printer is provided with the 4-SPS / PS parallel mechanism, and a parallel mechanism upper platform is connected with the top of the 4-SPS / PS parallel mechanism. Rotation in the Z axis and movable printing movement in the Z axis are achieved, printing movement in the plane XOYis achieved, and functions on printing quality and printing precision are improved.

Description

technical field [0001] The invention belongs to the technical field of 3D printers, and relates to a cylindrical 6D printing system based on a four-degree-of-freedom parallel mechanism. Background technique [0002] At present, most of the working structures of 3D printers are space-orthogonal mechanisms, and the form of material forming is relatively simple. Most of the processing of the entire workpiece is achieved by plane layering. The horizontal direction of the base does not change during its movement, so During the molding process, the angle between the nozzle and the plane of the base is always at a fixed value. Although this principle is simple and practical, it does not take into account the change of the printing direction when the arc or curved surface material is formed. When the material is printed layer by layer In the process of arc or curved surface, since the angle between the nozzle and the plane of the base does not change, the distance between the lines ...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the working structures of 3D printers are space-orthogonal mechanisms, and the form of material forming is relatively simple. Most of the processing of the entire workpiece is achieved by plane layering. The horizontal direction of the base does not change during its movement, so During the molding process, the angle between the nozzle and the plane of the base is always at a fixed value. Although this principle is simple and practical, it does not take into account the change of the printing direction when the arc or curved surface material is formed. When the material is printed layer by layer In the process of arc or curved surface, since the angle between the nozzle and the plane of the base does not change, the distance between the lines formed by the ejected material will change in layer-by-layer printing; When forming a part, it is usually necessary to add a support structure; especially when molding fiber-reinforced composite materials, it cannot be completely molded according to the fiber orientation; this will undoubtedly lead to inconsistent local accuracy, which will affect the final accuracy of the entire workpiece

[0003] In addition, the movement form of traditional 3D printers is realized by three independent servo motors driving spatially orthogonal axial movements; its important mechanical structure is three mutually orthogonal axes, and the lack of rotational movement limits traditional 3D printing. Printing accuracy and range of use

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