Apparatus and method for producing a reliable breaking line for the industrial cutting to length of glass sheets

Patent metadata

Field	Value
Publication number	US-9771298-B2
Application number	US-201314649851-A
Country	US
Kind code	B2
Filing date	Dec 2, 2013
Priority date	Dec 20, 2012
Publication date	Sep 26, 2017
Grant date	Sep 26, 2017

Abstract

Apparatus and method for producing a reliable breaking line for the industrial cutting to length of glass sheets by means of a cutting wheel running on a float glass line under pressure imposed from above, with the following features: a) the location of the beginning of a breaking line is determined and a cutting wheel holder ( 20 ) with a cutting wheel ( 2 ) is brought into position, b) the cutting wheel holder ( 20 ) is lowered and the cutting wheel ( 2 ) is lowered onto the glass sheet ( 1 ) concerned with the desired pressing pressure, wherein the pressing pressure is set by means of a swing arm ( 3 ) and is monitored by means of a strain gauge ( 4 ) secured thereto, c) a change in the height of the glass sheet ( 1 ) prompts a control signal for an actuating motor ( 12 ) to be derived from the change in the resistance of the strain gauge ( 4 ), and the actuating motor brings about a corresponding change in the pressing pressure of the cutting wheel ( 2 ).

First claim

The invention claimed is:

1. A device for producing a reliable breaking line for the industrial cutting to length of glass sheets on a float glass line, the device comprising:
a) a cutting wheel ( 2 ) that moves under load pressure on a float glass line;
b) a base console ( 11 ) which has a rotation axis ( 19 ) at the lower side and in which there is rotatably supported a rotation head ( 5 ) which operates at one side and which is connected at the operating side by means of a resilient element ( 17 ) and a horizontally fixedly supported but vertically movably supported connection element ( 16 ) to a threaded spindle ( 15 ) which can move vertically in a connection sleeve ( 14 ),
c) a servo motor ( 12 ) at the upper side of the base console ( 11 ) having a motor shaft ( 13 ) which is securely connected to the connection sleeve ( 14 ),
d) a rocker bar retention member ( 6 ) which is constructed in a bar-like manner and which is connected at one side to the operating side of the rotation head ( 5 ) by means of connections ( 8 ) and which carries at the other opposite side a cutting wheel retention member ( 20 ) having the cutting wheel ( 2 ),
e) a rocker bar ( 3 ) in the form of a zone which is weakened in a selective manner by means of 4 large cylindrical holes and a small cylindrical hole between them in the central region of the rocker bar retention member ( 6 ), wherein these holes constitute in the side view circles having a large radius ( 22 ) and a circle having a small radius ( 23 ) and these holes merge seamlessly into each other in the longitudinal axes thereof,
f) an expansion measurement strip ( 4 ) at the upper side of the rocker bar ( 3 ) in order to detect the oscillations thereof, an electronic measurement system ( 21 ) relating thereto and a data cable ( 26 ) for controlling ( 27 ) the servo motor ( 12 ).

2. The device as claimed in claim 1 , wherein two of the 4 large cylindrical holes intersect in the rocker bar ( 3 ) to form a vesica piscis in the plane of section;
wherein the distance between the center point of the small cylindrical hole from the center points of the two large cylindrical holes is equal to double the radius ( 23 ) of the small cylindrical hole; and
wherein the ratio between the radius ( 23 ) and the radius ( 22 ) is 1 to 1.55.

3. A device for producing a reliable breaking line for the industrial cutting to length of glass sheets on a float glass line, comprising a tool changing head ( 24 ) and a plurality of devices as claimed in claim 1 , wherein the devices as claimed in claim 1 are arranged in a turret-like manner in the tool changing head ( 24 ).

4. The device as claimed in claim 1 , further comprising a sensor that can detect the height position of the glass sheet 1 when the glass sheet 1 is located directly upstream of the cutting operation.

Assignees

• Grenzebach Maschb Gmbh

Inventors

• Linnhoff Winhold
• Schönheits Klaus
• Müller Michael

Classifications

• C03B33/033 Primary

  Apparatus for opening score lines in glass sheets · CPC title

• C03B33/10

  Glass-cutting tools, e.g. scoring tools · CPC title

• C03B18/02

  Forming sheets · CPC title

• C03B33/027 Primary

  Scoring tool holders; Driving mechanisms therefor · CPC title

• C03B33/037

  Controlling or regulating · CPC title