A gun head device that is convenient for distance measurement and a method for controlling the height of the print head

Abstract

The invention discloses a gun head device for distance measurement, which includes a print head, a distance measurement mechanism, and a gun frame for installing the print head and the distance measurement mechanism. The distance measurement mechanism includes a distance detection device fixedly installed on the gun frame The component and the connecting rod group that can be lifted and installed below the distance detection component, the lower end of the connecting rod group is equipped with casters that are relatively fixed in the axial direction, and the casters are always in close contact with the surface of the workpiece to be measured; the distance The detection component is used to detect the distance between it and the connecting rod group, so as to obtain the distance between the printing head and the surface of the workpiece. The invention also discloses a method for controlling the height of the printing head. The gun head device of the invention can accurately measure the distance between the printing head and the surface of the workpiece.

Description

technical field [0001] The invention relates to the field of electrofusion additive manufacturing, in particular to a gun head device that is convenient for distance measurement and a method for controlling the height of the print head of the gun head device. Background technique [0002] In order to improve the performance of key components in the heavy equipment industry (such as nuclear power, pressure vessels, penetrations or voltage stabilizers in the petrochemical industry, etc.), an electrofusion forming method has been developed in the prior art. This electrofusion forming method passes According to the experimental research, the chemical and mechanical properties of the workpiece processed by this electrofusion forming method are good. [0003] Among them, when the workpiece is processed by the electrofusion forming method, the printing accuracy of the gun head must be strictly controlled, such as the height and temperature of the print head. If it cannot be accurat...

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Problems solved by technology

[0003] Among them, when the workpiece is processed by the electrofusion forming method, the printing accuracy of the gun head must be strictly controlled, such as the height and temperature of the print head. If it cannot be accurately controlled, it will have a serious impact on the performance of the processed workpiece. It will affect the distance between the conductive tip of the print head and the surface of the workpiece. If the distance deviates from the normal range, the thickness of each layer of the workpiece will be uneven, which will seriously affect the performance of the workpiece

[0004] In the prior art, an infrared sensor is generally used to detect the distance between the conductive tip and the surface of the workpiece, that is, an infrared sensor is installed on the tip of the gun, and the infrared rays emitted by the infrared sensor are directed at the surface of the workpiece. When the infrared rays reach the surface of the workpiece, they will be reflected. In this way, the distance between the contact tip and the surface of the workpiece can be inferred. However, when using this method, the infrared rays will be affected by the brightness of the workpiece surface, resulting in large measurement errors, which cannot meet the accuracy requirements of additive manufacturing.

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