A method for solving the end collapse of open thin-walled parts formed by laser cladding
A technology of laser cladding and thin-walled parts, which is applied in the direction of improvement of process efficiency, additive manufacturing, and additive processing. It can solve problems such as scrapping, affecting the appearance of parts, and the inability to continue processing parts, so as to improve utilization rate, Effect of preventing tip collapse
Active Publication Date: 2019-03-15
SUZHOU UNIV
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Problems solved by technology
[0003] However, laser cladding forming technology often has different defects when processing thin-walled parts, such as the collapse of the end of open thin-walled parts
The occurrence of collapse not only affects the appearance of the part, but even makes the processing of the part unable to continue, resulting in scrap
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[0026] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0027] See figure 1 , a complete cladding single pass is composed of opening cladding 3 , single pass equal section body 2 and closing light cladding point 1 . The open-light cladding point 3 is similar to the shape of a spherical defect, and the off-light cladding point 1 is slightly collapsed. During the experimental accumulation, due to the accumulation of shape errors of the model parts at the end of the off-light cladding point 1, the final formed part is in the off-light cladding. Point 1 collapsed and the experiment could not continue. In order to make the off-light cladding point 1 of the cladding single pass full enough, enough energy needs to be provided there,...
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The invention relates to a method for solving the end collapse of an open thin-walled part formed by laser cladding, which includes the following steps: (1) taking a photo of the thin-walled part, and importing the photo of the thin-walled part into a drawing software for displaying in the drawing software A model part is formed. The model part has part of the shape that is missing due to the collapse. The part of the shape that is missing due to the collapse of the model part is regarded as a defect iso-section body, and the volume V of the defect iso-section body is obtained after processing. 1 ; (2) By means of simulation, the method of laser stagnation is adopted at the position of the defect iso-section body to form the defect iso-section body by accumulation, and the total stagnation time T required to form the iso-section body is calculated; (3) at the same process parameters , the stagnation time t of each layer of the laser beam at the coordinate position of the defect isometric body is calculated by calculating the total stagnation time T; (4) Under the same process parameters, the laser beam stagnates at each layer at the coordinate position of the defect isometric body The time is t, so that it is piled up layer by layer until the model entity is obtained.
Description
technical field [0001] The invention relates to a method for solving the end collapse of an open thin-walled part formed by laser cladding, in particular to a method for solving the problem of laser cladding forming an open thin-walled part by controlling the laser beam to stagnate at the end of the formed part for a certain period of time. End collapse problem. Background technique [0002] Thin-walled components are widely used in various engineering fields due to their advantages of light weight, easy processing, and low production costs, such as various civil pillars, trusses, arms, beams, bases, and military aviation aircraft wings, blades, etc. The traditional method of processing thin-walled components is mostly machining, and the material is removed from the blank to form, so the utilization rate of the material is low. Laser cladding forming technology is to use the computer to generate the 3D CAD solid model of the part, and then use the method of slice layering t...
Claims
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IPC IPC(8): B22F3/105B33Y10/00B33Y50/02
CPCB33Y10/00B33Y50/02B22F10/00B22F10/25B22F10/366B22F10/36B22F10/80Y02P10/25
Inventor 傅戈雁邓志强石拓石世宏周斌
Owner SUZHOU UNIV