Forming method of uneven high-precision laser additives

Abstract

The invention discloses a forming method of uneven high-precision laser additives. The method comprises the steps of forming additives by adopting an arc heat source; driving a laser displacement sensor to scan the surface profile of an additive forming piece, and calculating the surface accuracy of a workpiece according to the deviation of measured values of the sensor; inputting the accuracy into a modeled controller, and reconstructing a surface model of a part by the controller, so that the difference with the original surface accuracy is obtained, repair parameters of different areas in the surface of the part are determined, and control measures are sent; and inputting the repair parameters into a robot control cabinet, and applying laser heat sources with different energy and frequency to the different areas in the surface of the workpiece by the control cabinet according to the repair parameters. After repair, the laser displacement sensor is driven again so as to scan the surface profile, whether the repaired workpiece reaches the standard is determined, and if the repaired workpiece does not reach the standard, the workpiece is repaired again until the workpiece reaches the standard. According to the method, the surface accuracy of a laser additive member can be effectively increased, so that the quality of the laser additive forming piece is increased.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, in particular to a high-precision laser additive forming method for non-flat surfaces. Background technique [0002] In recent years, with the rapid development of computer level, laser cladding technology has been widely used in the field of manufacturing. Combining technologies such as numerical control, computer-aided design, and material science, laser cladding has the advantages of short manufacturing cycle and simple processing technology. An "additive" manufacturing method, which directly, quickly and flexibly converts design ideas into parts with certain functions. Laser cladding technology can form a near-net shape of three-dimensional arbitrary shape high-performance metal by means of powder feeding or wire feeding. [0003] Because the arc cladding process is very complex and has many influencing factors, there are also various problems and deficiencies. At present, th...

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Problems solved by technology

[0003] Since the arc cladding process is very complicated, there are many influencing factors, and there are various problems and deficiencies

At present, there are four main problems in the arc cladding technology: (1) During the cladding process, the powder sprayed from the nozzle will not all enter the laser molten pool, and the powder will bond on the surface of the formed part, and the surface accuracy and quality will be affected. decline

(2) The quality of cladding formed parts is unstable, the surface flatness is not high, and pores and cracks are prone to appear in the cladding layer

(3) When manufacturing parts with complex shapes and structures, the transition position is prone to collapse and knots, and the overall shape is easy to deform

(4) Sensitivity to quality changes of cladding parts due to environmental changes, while real-time monitoring and control of the cladding layer is immature

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