A 3D printer suitable for high precision machining of shaft parts

Abstract

The invention discloses a 3D printer suitable for high-precision machining of shaft parts. The 3D printer comprises a pedestal, a slippage base, a screw rod, a screw rod motor, ejector pin bases, an extrusion head and a moving device used for driving the extrusion head to move. Sliding rails with the slippage directions being the same as the axial directions of the ejector pin bases are arranged on the pedestal. The slippage base is arranged inside the sliding rails to achieve sliding fit. The slippage base is provided with a threaded hole with the axial direction being the same as the directions of the sliding rails. The screw rod is arranged in the threaded hole to be in screw-thread fit and is further in linkage fit with the screw rod motor. The moving device comprises an annular movingbase and a rotating drive motor. The slippage base is provided with an annular support. The annular support is provided with an annular groove which is coaxial with ejector pins, a driving gear and arotating drive motor used for driving the driving gear to rotate. The annular moving base is matched with the annular groove and is further arranged in the annular groove to achieve rotary sliding fit. A gear is arranged on the outer circumferential face of the annular moving base, and the driving gear is engaged with the gear on the outer circumferential face of the annular moving base. The extrusion head is arranged in a radial discharging mode and is further in linkage fit with the annular moving base.

Description

technical field [0001] The invention relates to the technical field of 3D printing, in particular to a 3D printer suitable for high-precision machining of shaft parts. Background technique [0002] 3D printing is currently an emerging industry, and there are various 3D printer structures in the prior art, including parallel 3D printers. Parallel 3D printers, also known as Delta 3D printers, Delta 3D printers, etc., have three vertically arranged slide rails, and each slide rail is equipped with a slider that can be driven by a driving device to slide vertically. A connecting rod group is hingedly installed on each slider, and each connecting rod group is composed of two parallel connecting rods arranged side by side, and the other ends of the connecting rod group are connected to the extrusion head. When working, the three sliders slide to change the position of the extrusion head in space, and the extrusion head extrudes the molten 3D printing material to the specified coo...

AI Technical Summary

Problems solved by technology

[0004] However, the problems existing in the existing 3D printers are: in parallel 3D printers, the core difficulty of assembly lies in the cooperation of the connecting rod group, the slider and the sliding shaft, because the connecting rod group needs to be hinged on the slider, and the slider and The sliding shaft needs to be slidably matched and matched with the driving device as the power source, and the sliding shaft needs to be installed vertically on the base. During assembly, it is easy to reduce the accuracy of 3D printing because the assembly accuracy cannot meet the requirements. The sliding between the slider and the sliding shaft With low matching accuracy, it is difficult to achieve high finishing

Moreover, although the existing 3D printers can manufacture shaft parts through stacked manufacturing, it is difficult to guarantee the most critical coaxiality of shaft parts due to machining accuracy.

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