Digitalizing control method for milling quantity of powder spray gun

Abstract

The invention provides a digitalizing control method for milling quantity of a powder spray gun, which comprises the following steps that: a gas circuit is divided into a main gas circuit and an auxiliary gas circuit, and an electrical control valve is respectively arranged on inlets of the main gas circuit and the auxiliary gas circuit; the relationship between an opening extent of the electrical control valve and milling quantity is obtained by researching characteristics of a powder pump and the electrical control valve; and finally the digitalizing control of milling quantity of the powder spray gun is realized through a chip microcomputer. The digitalizing control method has the beneficial effects that milling quantity is directly taken as an adjustment object, the method has stronger immediacy and convenience in operation, the relationship between control quantity digitalization and control quantity is formulistic, the precision is high, the effect of milling and atomizing is good, and the repeatability is good.

Description

technical field [0001] The invention belongs to the field of precise control methods for powder output of spray guns in the coating industry, in particular to a digital control method for powder output of powder spray guns. Background technique [0002] Electrostatic powder coating is the most commonly used powder coating method in the field of industrial coating, and the spray gun controller is the key factor affecting the effect of powder coating. In the prior art, the powder output of the spray gun and the atomization effect are mainly controlled by adjusting the main and auxiliary air inlet pressures through the pointer manual adjustment valve on the manual controller. This control method is relatively simple, but It has the following defects: 1. The operation is complicated, and the operator needs to adjust the compressed air to the ideal state through the visual pressure gauge; 2. It is not intuitive, and the operator only gets the indirect air volume value, and there ...

AI Technical Summary

Problems solved by technology

In the prior art, the powder output of the spray gun and the atomization effect are mainly controlled by adjusting the main and auxiliary air inlet pressures respectively through the pointer manual adjustment valve on the manual controller. This control method is relatively simple, but It has the following defects: 1. The operation is complicated, and the operator needs to adjust the compressed air to the ideal state through the visual pressure gauge; 2. It is not intuitive, and the operator only gets the indirect air volume value, and there is no intuitive powder volume value; 3. , poor repeatability, different operators may get different results

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