Heat chamfering apparatus and method

Patent metadata

Field	Value
Publication number	US-12577142-B2
Application number	US-202218286173-A
Country	US
Kind code	B2
Filing date	Apr 8, 2022
Priority date	Apr 14, 2021
Publication date	Mar 17, 2026
Grant date	Mar 17, 2026

Abstract

A heat chamfering method for a glass panel includes bringing a heater into contact with an edge of a glass panel by causing the heater to approach a chamfering start point, heat-chamfering the edge by moving the heater from the chamfering start point to a chamfering end point along a chamfering line, and bringing the heater into non-contact with the glass panel by causing the heater to depart from the chamfering end point. The heat-chamfering may include maintaining contact pressure between the heater moving along the chamfering line and the glass panel within a predetermined range of change. In the approaching, an angle defined by a chamfering start point approach line and the chamfering line at the chamfering start point ranges from 155° to 175°. In the departure, an angle defined by the chamfering line and a chamfering end point departure line ranges from 155° to 175°.

First claim

What is claimed is:

1 . A heat chamfering method for a glass panel, the method comprising:
bringing a heater into contact with an edge of a glass panel by causing the heater to approach a chamfering start point by relative movement between the heater and the glass panel; heat-chamfering the edge of the glass panel by applying thermal shock thereto while causing the heater to move from the chamfering start point to a chamfering end point along a chamfering line by relative movement between the heater and the glass panel; and bringing the heater into non-contact with the glass panel by causing the heater to depart from the chamfering end point by relative movement between the heater and the glass panel, wherein the heat-chamfering comprises controlling a relative position between the glass panel and the heater such that contact pressure between the glass panel and the heater is maintained during the relative movement between the heater and the glass panel along the chamfering line, wherein the heater approaches the chamfering start point such that an angle defined by an approach line, along which the heater approaches the chamfering start point, and the chamfering line at the chamfering start point ranges from 155° to 175°, and the heater departs from the chamfering end point such that an angle defined by the chamfering line and a departure line, along which the heater departs from the chamfering end point, ranges from 155° to 175°.

2 . The heat chamfering method of claim 1 , wherein a change in the contact pressure between the heater and the glass panel is maintained within a predetermined range during the relative movement between the heater and the glass panel along the chamfering line.

3 . The heat chamfering method of claim 2 , wherein the predetermined range is ±0.45 kgf/cm 2 .

4 . The heat chamfering method of claim 2 , wherein the change in the contact pressure between the heater and the glass panel is maintained within the predetermined range by maintaining the contact pressure between the heater and the glass panel within a range of 0.1 kgf/cm 2 to 1.0 kgf/cm 2 .

5 . The heat chamfering method of claim 4 , wherein the change in the contact pressure between the heater and the glass panel is maintained within the predetermined range by maintaining the contact pressure between the heater and the glass panel within a range of 0.2 kgf/cm 2 to 0.5 kgf/cm 2 .

6 . The heat chamfering method of claim 1 , wherein the change in the contact pressure between the heater and the glass panel is maintained within the predetermined range by measuring a value of the contact pressure in real time using a sensor and feedback-controlling the relative position of the heater with respect to the glass panel in accordance with the measured value of the contact pressure.

7 . The heat chamfering method of claim 1 , wherein the thickness of the glass panel is 0.5 mm or less.

8 . The heat chamfering method of claim 1 , wherein the heater comprises:
a hot body configured to chamfer the edge of the glass panel by applying thermal shock thereto while being in contact with the edge of the glass panel; and an induction coil configured to heat the hot body by induction heating.

9 . A heat chamfering method for a glass panel, the method comprising:
bringing a heater into contact with an edge of a glass panel by causing the heater to approach a chamfering start point by relative movement between the heater and the glass panel; heat-chamfering the edge of the glass panel by applying thermal shock thereto while causing the heater to move from the chamfering start point to a chamfering end point along a chamfering line by relative movement between the heater and the glass panel; and bringing the heater into non-contact with the glass panel by causing the heater to depart from the chamfering end point by relative movement between the heater and the glass panel, wherein the heater approaches the chamfering start point such that an angle defined by an approach line, along which the heater approaches the chamfering start point, and the chamfering line at the chamfering start point ranges from 155° to 175°, and the heater departs from the chamfering end point such that an angle defined by the chamfering line and a departure line, along which the heater departs from the chamfering end point, ranges from 155° to 175°.

10 . The heat chamfering method of claim 9 , wherein the heater approaches the chamfering start point such that the angle defined by the approach line and the chamfering line at the chamfering start point ranges from 160° to 170°, and
the heater departs from the chamfering end point such that the angle defined by the chamfering line and the departure line ranges from 160° to 170°.

11 . The heat chamfering method of claim 9 , wherein the thickness of the glass panel is 0.5 mm or less.

12 . The heat chamfering method of claim 9 , wherein the heater comprises:
a hot body configured to chamfer the edge of the glass panel by applying thermal shock thereto while being in contact with the edge of the glass panel; and an induction coil configured to heat the hot body by induction heating.

13 . A heat chamfering apparatus for a glass panel, the heat chamfering apparatus comprising:
a support unit configured to support a glass panel; a heater configured to heat-chamfer an edge of the glass panel by contact with the edge of the glass panel; and a control unit, wherein the control unit performs:
relatively moving the heater and the glass panel such that the heater approaches a chamfering start point to come into contact with the edge of the glass panel, wherein the heater approaches the chamfering start point such that an angle defined by an approach line, along which the heater approaches the chamfering start point, and the chamfering line at the chamfering start point ranges from 155° to 175°;
relatively moving the heater and the glass panel such that the heater heat-chamfers the edge of the glass panel by applying thermal shock thereto while moving from the chamfering start point to a chamfering end point along a chamfering line; and
relatively moving the heater and the glass panel such that the heater departs from the chamfering end point, thereby coming into non-contact with the glass panel, wherein the heater departs from the chamfering end point such that an angle defined by the chamfering line and a departure line, along which the heater departs from the chamfering end point, ranges from 155° to 175°, and
the control unit controls a relative position between the glass panel and the heater such that a contact pressure between the heater and the glass panel is maintained while the heater is being moved from the chamfering start point to the chamfering end point along the chamfering line.

Assignees

• Corning Inc

Inventors

• Kong Bokyung
• Lee Jooyoung
• Moon Byoung Hoon
• Woo Kwangje

Classifications

• C03B33/09

  by thermal shock · CPC title

• C03B33/033

  Apparatus for opening score lines in glass sheets · CPC title

• B26F3/08

  with heated members · CPC title

• B26D2001/0053

  having a special cutting edge section or blade section · CPC title

• B26D5/00

  Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting · CPC title