Laser cladding device with adjustable cladding track and method for adjusting cladding track width

Abstract

The invention discloses a laser cladding device with an adjustable cladding track and a method for adjusting the width of the cladding track. The laser cladding device comprises a laser cladding head component, a laser, a powder feeder and a central controller, wherein the cladding head is mounted on a vertical adjusting device which can drive the cladding head to move up and down in the vertical direction; a lens is arranged in the cladding head; a powder feeding pipe is mounted on the cladding head through an angle adjusting device which can adjust the included angle between the powder feeding pipe and the cladding head; and a signal transformer, a powder feeding controller and a counter are arranged in the central controller. According to the laser cladding device, the width of the cladding track can be adjusted, the powder conveying quantity and powder feeding angle can be adjusted according to the change of the cladding width while the light spot size changes, fluctuation of height and instability of the section shape of the cladding track are avoided, the laser power density remains unchanged, the thickness of a cladding layer remains unchanged, and the cladding effect is guaranteed.

Description

technical field [0001] The invention relates to a laser cladding device with adjustable cladding track and a method for adjusting the width of the cladding track. Background technique [0002] The coaxial cladding head is a commonly used laser cladding processing tool. The structure of the traditional coaxial cladding head is: the fixed lens group passing through the central axis converges the laser beam, and the powder feeding flow symmetrically distributed along the same central axis The laser beam and the powder flow are converged on the same axis. The laser converging point and the powder converging point of this traditional coaxial cladding head are fixed, therefore, the adjustment and change of the section width at different positions cannot be realized on one cladding track. [0003] Thin-walled complex parts such as blades have the characteristics of thin walls, complex cross-sectional tracks, and cross-sectional widths that vary with the track. When using tradition...

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Problems solved by technology

[0004] Although the above method of the Fraunhofer Laser Institute in Germany can change the width of the cladding track by changing the spot size at different positions on the track, it does not adjust the powder delivery volume and The location of the powder delivery, which will cause fluctuations in the height of the cladding track and instability of the cross-sectional shape; in addition, because the high-power laser beam passing through the lens will cause heat accumulation on the lens, this solution uses a servo motor to drive the lens to move. Facilitates the placement of heat sinks in a small space inside the cladding head, thus limiting the power of the laser beam passing through the lens

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