【Jiaqin Comment】In the preparation scheme of precision thin-walled parts invented by Hanbang Technology, a new preparation method for special structures such as complex inner cavity, deep hole, cone hole, thin-walled and so on has been opened up, which not only makes up for the shortcomings of the relatively low processing accuracy of the existing three-dimensional molding technology, but also realizes the preparation of complex inner cavity or precision thin-walled parts.
According to micro-network news, three-dimensional molding technology is an advanced intelligent manufacturing method developed by integrating a variety of modern science and technology, which forms arbitrary and complex parts by obtaining part information and forming arbitrary and complex parts through layer-by-layer additive manufacturing under the action of heat source.
At present, this three-dimensional molding technology has been widely used in mold manufacturing, aerospace, medical equipment, industrial verification, prototype manufacturing, model design, artistic creation, automotive, electronics and education and scientific research and other industries, and plays an important role in these industries and fields.
However, the dimensional accuracy and surface roughness of the workpieces manufactured by the existing three-dimensional molding technology are often difficult to meet the processing requirements of precision parts, and it is usually necessary to transfer the product to the machining equipment for re-processing after the completion of additive manufacturing molding, resulting in low processing efficiency.
In order to seek a simple three-dimensional molding technology, Hanbang Technology applied for an invention patent entitled "Preparation Method and Three-dimensional Molding Device for Complex Inner Cavity or Precision Thin-walled Parts" on September 29, 2019 (application number: 201910934917.1), and the applicant was Guangdong Hanbang Laser Technology Co., Ltd.
According to the relevant information currently published in the patent, let's take a look at this technical solution.
As shown in the above figure, for the invention of the patent of the complex inner cavity or precision thin-walled parts preparation method flowchart, first, the system to obtain the part of the sheet layer information, the need to form the part three-dimensional model into a three-dimensional molding control system, relying on the system program to obtain the part of the layer information, for the subsequent layer by layer molding work. For example, parts that need to be molded require different special structures that are difficult to manufacture by ordinary machining, such as different special-shaped inner chambers, thin walls, inverted cone holes, and deep holes.
Secondly, the first laser melts the material according to the acquired sheet information to form a thin layer of parts, and the second laser cuts the edge contour of the thin layer of the part according to the acquired sheet information. After the single-layer part thin layer is manufactured, the three-dimensional molding system quickly switches the light source, switches the first laser to the second laser, which is used to cut the edge contour of the thin layer of the part and micro-machine the contour of the thin layer of the part to ensure the outer contour quality of the thin layer of each layer of the part.
As shown in the above figure, for this structural schematic diagram of the need for three-dimensional molding parts, the outer surface of the entire part 22, in addition to the surface parallel to the molding platform, is composed of a multilayer part of a thin layer of edge profile. Such a processing method can ensure the quality of the outer contour of the thin layer of each layer of parts, and can improve the machining accuracy of the outer surface of the entire part, so as to avoid the processing accuracy of the part surface due to the error accumulation of the thin layer of the part.
Finally, it is then judged whether the thin layer of the cut part has the upper surface of the part, if there is a thin layer of the part, there is no need to form a new thin layer of the part; if there is no thin layer of the part, the current position parameters are used to directly machine the surface of the thin layer of the cut part, and repeat the above process until the entire part completes the molding work.
Finally, as shown above, is the structural block diagram of the three-dimensional molding device invented in the patent, with the help of the device, the preparation of the above-mentioned complex inner cavity or precision thin-walled parts can be realized. The apparatus 3 includes: a control unit 31, a first laser assembly 32, a second laser assembly 33, a machining component 34, an optical inspection component 35 and a material supply component 36. Under the control of the control unit, the various components cooperate with each other to perform the preparation method, and the control unit executes the relevant commands.
The above is the preparation scheme of precision thin-walled parts invented by Hanbang Technology, which opens up a new preparation method for special structures such as complex inner cavity, deep hole, cone hole, thin wall, etc., which not only makes up for the shortcomings of the relatively low processing accuracy of the existing three-dimensional molding technology, but also realizes the preparation of complex inner cavity or precision thin-walled parts.
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