Split type magnetic field auxiliary coaxial laser cladding device with adjustable field intensity distribution

Abstract

The invention discloses a split type magnetic field auxiliary coaxial laser cladding device with adjustable field intensity distribution. The split type magnetic field auxiliary coaxial laser claddingdevice comprises a laser transmission channel and a nozzle which are coaxially arranged with a laser path, the laser transmission channel is sleeved with a shaft sleeve tube, and the lower end of thelaser transmission channel and the lower end of the shaft sleeve tube are both connected with the nozzle; the shaft sleeve tube, the laser transmission channel and the nozzle are coaxially arranged;the shaft sleeve tube is sleeved with a shaft sleeve, the shaft sleeve is sleeved with a clamping groove ring device, the clamping groove ring device comprises an upper bevel gear clamping groove ring, a transmission bevel gear and a lower bevel gear clamping groove ring, the transmission bevel gear is fixedly connected with the shaft sleeve, and the upper bevel gear clamping groove ring and the lower bevel gear clamping groove ring are connected with the shaft sleeve tube through bearings correspondingly; and the upper side and the lower side of the transmission bevel gear are engaged with the upper bevel gear clamping groove ring and the lower bevel gear clamping groove ring correspondingly. According to the split type magnetic field auxiliary coaxial laser cladding device with the adjustable field intensity distribution, the external steady-state magnetic field can synchronously move along with a laser cladding head, regulation and control machining of a complex path can be achieved, convenience and rapidness are achieved, and the application range is wide.

Description

technical field [0001] The invention belongs to the technical field of laser processing and manufacturing, and in particular relates to a split-type magnetic field-assisted coaxial laser cladding device with adjustable field intensity distribution. Background technique [0002] Laser cladding technology is a surface modification technology that uses a high-energy density laser beam as a heat source to clad a layer of alloy coating with completely different composition and performance from the substrate surface, which can significantly improve the mechanical properties and wear resistance of the substrate surface. , heat resistance, corrosion resistance, to achieve the purpose of partial repair or overall strengthening. Laser cladding has the advantages of fast cooling speed, low coating dilution rate, small heat input and distortion, less consumables, no powder selection restrictions, green and low pollution, and easy automation. However, since the melting and solidificatio...

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Problems solved by technology

[0003] 1. The control of laser cladding structure is generally by changing the process parameters, and the process parameters can only change the external heat transfer boundary of the molten pool of the cladding layer, and it is difficult to control the shape, size and crystal orientation of the crystals in the cladding structure and the convection of the molten pool. for flexible control

[0004] 2. The heating and solidification speed of laser cladding is fast, and the cladding layer elements have no time to homogenize thermal diffusion, resulting in uneven structure and composition segregation, and the gas generated by the cladding layer is too late to be removed, resulting in defects such as pores, which affect the cladding layer organizational performance

[0005] 3. Under the irradiation of high-energy laser beams, the molten pool of the cladding layer is strongly stirred, and it is difficult to achieve its layering or gradient control in the process of single-layer laser cladding

[0007] Most of the existing magnetic field assisting devices are fixed on the workbench and cannot move with the movement of the laser spot. It cannot guarantee that the application of the magnetic field is consistent when the laser processes the molten pool at every moment, and it cannot control the distribution of the field intensity. Single and limited control ability, it can only be used for laser processing on simple paths, but not for complex paths, and the adaptability of the applied magnetic field is poor

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