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Laser polishing method for ceramic workpiece

A technology for workpieces and ceramics, which is applied in the field of laser grinding and sanding of ceramic workpieces, which can solve the problems of thermal deformation of the back cover of ceramic mobile phones, too smooth ceramic surface, unfavorable coating adhesion, etc.

Inactive Publication Date: 2021-07-16
HANS LASER TECH IND GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ceramic sandblasting will cause serious thermal deformation of the back cover of ceramic mobile phones due to the impact of high-temperature and high-speed ceramic sand on the ceramic surface in a short time
The obvious disadvantage of using chemical solvents to clean the surface is that the ceramic surface is too smooth, which is not conducive to the adhesion of the later coating.

Method used

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  • Laser polishing method for ceramic workpiece

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Provide zirconia ceramic mobile phone rear cover, sequentially with acetone, alcohol, deionized water to ultrasonic cleaning of zirconia ceramic mobile phone rear cover, and then dry with dust cloth.

[0049] The infrared nanosecond laser and laser range of 1064 nm and the pulse width of 60 ns are selected from 160 mm × 160 mm. The laser is placed on the precision machining platform, and the laser device is turned on, and the laser is adjusted. To make the laser focus focus on the upper surface of the zirconia ceramic phone back cover.

[0050]The two sets of CCD visual devices with large vision are selected, and the upper left edges of the ceramic mobile phone rear cover are positioned, and the coordinates and rotation angles of the rutzirconal ceramic phone rear cover are respectively positioned.

[0051] Setting the laser process parameters in the marking software, the power of laser processing is 15W, the processing speed is 800mm / s, the frequency is 40 kHz, the relea...

Embodiment 2

[0055] Embodiment 2 is substantially identical to Example 1, and the difference point is only in the selection of infrared nanosecond lasers having a wavelength of 1064 nm and a pulse width of 75 ns, and controls the power of the laser processing of 20W.

[0056] In this embodiment, the laser depth of the zirconia ceramic mobile phone rear cover is 30 μm, and the surface roughness is 6 μm.

Embodiment 3

[0058] Example 3 was substantially identical to Example 1, only an infrared nanosecond laser selected from 1064 nm and a pulse width of 90 ns, and controls the power of laser processing of 26W.

[0059] In this embodiment, the laser depth of the zirconia ceramic mobile phone rear cover is 60 μm, and the surface roughness is 12 μm.

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Abstract

The invention relates to a laser polishing method for a ceramic workpiece. According to the laser polishing method for the ceramic workpiece, a nanosecond laser is selected to enable the pulse width of laser processing to be in a nanosecond level; the pulse width is in the nanosecond level, so that proper thermal diffusion can be ensured during laser processing, and the laser path width of the frosted surface obtained through processing is guaranteed; and the power of laser processing is controlled to range from 15 W to 26 W, so that the frosted surface obtained through processing can have the proper depth, the ratio of the average power to the pulse width of laser processing can be at the proper value, and the frosted surface obtained through processing has the proper roughness.

Description

Technical field [0001] The present invention relates to the field of laser processing, and more particularly to a method of laser grinding sand in a ceramic workpiece. Background technique [0002] In the upcoming 5G mobile phone app, the advantage of the zirconia ceramic mobile phone rear cover as a 5G mobile phone cover is: 1. Contrast metal, zirconia ceramics electric insulation does not form a shield of electromagnetic signals, so the mobile phone body can Make integrated. 2. The hand and glass of zirconia ceramic material are very similar, but zirconia ceramics are much harder than glass, and Moh's hardness is second only to sapphire, so the zirconia ceramic body has wear resistance and scratch resistance, and occasionally falls. Break. [0003] The existing method of zirconia ceramic mobile phone rear sanding, such as hand-grinding, ceramic sandblasting, chemical solvent cleaning, there is a series of technical disadvantages. Hand-grinding can be made with grinding, but the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28B11/08
CPCB28B11/0872B28B11/0836
Inventor 李锋胡述旭曹洪涛吕启涛高云峰
Owner HANS LASER TECH IND GRP CO LTD
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