A 2.5d cover plate arc edge polishing method

Abstract

The invention provides a 2.5D cover plate arc edge polishing method, by setting the relationship between the moving direction and the rotating direction of the polishing head: The position is turned to the center plane of the product. On the one hand, it can avoid the unevenness of the polishing quality of the arc edge, and on the other hand, it can effectively prevent the defects of the straight body of the 2.5D cover plate, especially at the R angle position of the 2.5D cover plate. Base throw defect. In the present invention, when the polishing head polishes a long or short arc edge, the polishing head first moves along the long or short arc edge of the product from the head end to the end while rotating, and then returns from the end to the head end. On the one hand, the surface quality of the arc edge is more uniform; on the other hand, the alignment between the polishing head and the base is easier. In addition, the present invention also reasonably sets the hardness of the hard layer and the soft layer to ensure that the straight body does not have throwing defects and at the same time does not cause throwing defects.

Description

technical field [0001] The invention relates to a polishing process, in particular to a method for polishing arc edges of a 2.5D cover plate. Background technique [0002] The 2.5D cover with curved edges on one side is widely used in the window screens of digital electronic products such as mobile phones, tablets, and smart watches due to its advantages of good hand feeling, impact resistance, breakage resistance, easy point control, and good visual effects. The 2.5D cover arc edge polishing method is as follows figure 1 As shown, the product to be polished 1 (2.5D cover plate) is as figure 1 The way shown (the bottom surface is attached to the bottom surface, and the center plane is attached to the center plane) are stacked together. During the polishing process, product 1 will rotate around the product’s central axis. The brush wheel 4 can move left and right so that the bristles 41 on the outer wall of the brush wheel stick to the arc edge of the product to polish the ...

AI Technical Summary

Problems solved by technology

use figure 1 In the polishing method shown, the defects that will exist are: the closer the arc edge 11 is to the center plane of the product, the closer the bristles 41 are to the arc edge, and the closer the arc edge 11 is to the straight body 13, the closer the arc edge 11 is to the straight body 13. The closer to the vertical, the closer the arc edge 11 is to the central plane 12, the poorer the polishing effect (the uneven polishing quality of the arc edge will produce defects), and the transition between the arc edge 11 and the straight body 13 may exist The defect of throwing the base (that is, the sharp transition becomes a circular arc transition), especially for the four R angle positions of the cover plate, during the polishing process, the four R angles are relatively the four straight sides of the cover plate and the brush wheel. The contact area is smaller, and the pressure of the brush wheel is constant, so the pressure on the four R corners is greater, and the phenomenon of base throwing is more serious, and even the entire straight body will become an arc edge (see image 3 ), unable to meet the dimensional requirements of the cover plate in the subsequent assembly process, therefore, a solution is needed in the prior art to solve this problem

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