Cutting apparatus for hard and brittle thin sheets and its fixing fixture

Abstract

This disclosure provides a fixing fixture for fixing a hard, brittle thin sheet to be cut, and includes a cavity, a negative pressure source, and a stage. The cavity has an opening. The negative pressure source communicates with the cavity. The stage is disposed at the opening and closes the cavity. The stage has a bearing plane, on which a boundary is defined, corresponding to the contour of the hard, brittle thin sheet, and the boundary encloses a closed region. The bearing plane has a plurality of holes, each hole penetrating the stage and communicating with the cavity. The holes are arranged in an array within the closed region, and the distribution density of these holes within the closed region is between 50 holes / cm² and 60 holes / cm².

Claims

1. A fixing fixture for fixing a hard, brittle sheet to be cut, the fixing fixture comprising: a cavity having an opening; a negative pressure source communicating with the cavity; and a stage disposed at the opening to close the cavity, the stage having a bearing plane, a boundary defined on the bearing plane corresponding to the contour of the hard, brittle sheet, and the boundary enclosing a closed region, the bearing plane having a plurality of holes, each hole penetrating the stage and communicating with the cavity; wherein... The holes are arranged in an array within the enclosed area, and the distribution density of the holes within the enclosed area is between 50 holes / cm² and 60 holes / cm².

2. The fixing fixture as described in claim 1, wherein the area of ​​the enclosed region is between 1 cm² and 20 cm².

3. The fixing fixture as described in claim 1, wherein the diameter of each of the holes is between 0.1 mm and 2 mm.

4. The fixing fixture as claimed in claim 1, wherein the distance between each hole and the adjacent hole is between 0.1 mm and 2 mm.

5. The fixture as described in claim 1, wherein the array covers the enclosed area.

6. The fixing fixture as claimed in claim 1, wherein the bearing plane has a recess in the enclosed area for receiving the hard and brittle sheet.

7. The fixing fixture as claimed in claim 6, wherein the depth of the recess is less than the thickness of the hard and brittle sheet.

8. The fixing fixture as described in claim 7, wherein the depth of the recess is between 0.1 mm and 3 mm.

9. The fixing fixture as described in claim 1, wherein the holes are not directly connected.

10. A cutting apparatus for hard and brittle thin sheets, comprising: a fixture as described in any one of claims 1 to 9; and a cutting tool suspended above the stage of the fixture, the cutting tool being cylindrical and having a cutting tip at one end, the cutting tip being disposed facing the bearing plane; wherein... The outer diameter of the cutter head is larger than the diameter of each hole.

11. The hard and brittle sheet cutting apparatus as described in claim 10, wherein the outer diameter of the cutting head of the tool is between 0.5 mm and 6 mm.

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