Speaking of glass cut-out hole, it is a relatively common process.
As shown in the picture, two small cut-out holes are common in glass processing.
Sometimes there are many cases of cutting several holes,and the test is the CNC hole grinding technology, because it may occur defects when you grind to the last hole, the whole piece of glass will be scrapped.
There are small cut-out holes, which can be processed by most glass factories.
Today we are going to share a large through-hole in glass. How big is it?
First, the glass material is 4.0mm thickness, the glass shape is 25 inches, and the hole size is 330x150mm, nearly 14 inches.
How to process this kind of cut-out hole?
As we know, the traditional process of the cut-out hole glass is to cut material—CNC grinding shape—CNC roughly drilling hole—CNC refining cut-out hole and chamfer.But in fact, with such a large hole and such a thick glass, CNC could not process it at all. Moreover, it takes about 28 minutes for CNC to drill such a large piece of glass, which is too long. In the end, there are almost no qualified products.
How do we process it?
Yes, we can drill holes by laser cutting.First of all, we know that the efficiency of laser drilling is high. It only takes about 3 minutes for such a large piece of glass to drill a hole, but the traditional process is to cut the material – laser drilling -CNC grinding shape- refining large through holes and chamfer, what are the problems if do so? Because after laser drilling, you have to return to CNC for the edge grinding of the hole. First, CNC is not good at positioning after the hole’s drilling, so it needs to be adjusted N times. Second, there is still a lot of margin to be removed from the glass. There will be a lot of chipping and scratches on the surface, so this is not feasible.
How to solve these problems?
Our method is to grind the shape with CNC first, and then do laser drilling,
1. It can solve the problem of glass hole positioning.
2. The yeild rate of the CNC refined through hole and chamfer will be more than 80%. Only in this way, mass production is feasible.
There is this kind of large cut-out hole, which is relatively close to the glass edge, only 15mm. The processing is the same, and it’s to grind the shape first, and the irregular shape is also the same. The shape is to grind first, and then do the laser drilling. Therefore, the issue of processing large through-hole glass is solved.