Device and method for automatically eliminating shortage of lap joint/excessive accumulation phenomenon in low-temperature deposition manufacture

Abstract

The invention relates to a device and a method for automatically eliminating shortage of lap joint / excessive accumulation phenomenon in low-temperature deposition manufacture. The device comprises a rapid air inflation and deflation feeding device part and a control part, wherein the rapid air inflation and deflation feeding device part comprises a voltage stabilizing source device, an air pressure adjusting device, an air pressure detection device and a storage device; the regulator source device consists of an air compression part and a corresponding pressure regulating valve; the air pressure adjusting device is formed by connecting an inflation valve and an exhaust valve; the air pressure detection device is formed by a sensor connected at a charging barrel inlet in the storage device; the storage device is formed by sequentially connecting a feeding electromagnetic valve and a nozzle by a charging barrel; and an output hole of the regulator source device is connected with an input hole of the air pressure adjusting device. After the device and the method are adopted, the pressure can be rapidly and quantificationally adjusted according to the need, so that the response lag of the fluid flow velocity to the pressure change can be effectively compensated, and the phenomena of excessive accumulation and shortage of lap joint caused in the low-temperature deposition manufacture process can be effectively overcome.

Description

technical field [0001] The invention relates to a device and method for automatically eliminating underlap / overpile phenomena in warm deposition manufacturing. The pressure in the pneumatic feeding device can be adjusted on demand according to the low-temperature deposition forming path, so as to ensure the flow rate and receiving of forming materials. The ratio of the moving speed of the platform is kept constant, and the phenomenon of underlapping and overlapping in the forming process can be automatically eliminated, which belongs to the technical field of incremental manufacturing. Background technique [0002] Low-temperature deposition manufacturing using water-soluble materials is a typical incremental manufacturing technology. The process principle is: in a low-temperature forming environment, the forming material is extruded from the nozzle to the required position, and the material is rapidly solidified. From bottom to top, layers Layers are stacked to form a three...

AI Technical Summary

Problems solved by technology

However, the pneumatic feeding method cannot achieve rapid pressure switching, and in the initial stage of the air pressure, the material must be extruded to a certain pressure before the material flows out of the nozzle; at the end stage, although the extrusion is stopped, due to the residual pressure present, material will continue to flow from the nozzle

The hysteresis of pressure adjustment in pneumatic feeding and the hysteresis of the response of fluid flow rate to pressure changes often lead to the movement of the receiving platform if the forming structure changes during the continuous forming process, or when the forming path reaches the corner or end point. The speed changes rapidly, and the fluid flow rate cannot follow the change immediately, so the ratio between the two cannot be kept constant, resulting in over-forming accumulation or under-lapping phenomenon

These phenomena will affect the quality of the product, and in severe cases, it will cause the nozzle to be blocked or bent, and even lead to the failure of laminated manufacturing

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