presentation of the bohle ag about industrial glass ... 2 - peter... · manual cutting technology...

Automatic Glass Cutting

www.bohle-group.comPeter Pokoern

Director Product Unit Industrial Glass Processing

29.11.2017 Bohle AG · Dieselstraße 10 · D-42781 Haan · Germany

1

Presentation of the Bohle AG

about Industrial Glass Cutting Technology

at

GLASSTECH ASIA 2017





2

This is Bohle.

The Bohle Group

▪ was founded in 1923

▪ is family-owned in the third generation

▪ is a leading manufacturer and supplier of tools,

machines and accessories for glass

processing and glass finishing

▪ has over 300 employees at 13 locations





3

Bohle is There

Our focus is on glass - But that's not all!

Glass has been the focus of Bohle's activities

since the founding of the company. But many of

our products also find applications in other

sectors. For example, products from the

vacuum technology

sector are also used in stoneworking,

automobile manufacturing as well as other

industrial enterprises - as standard products or

as customized solutions.





4

Full Range – One Supplier

The Bohle modular principle

The full product range offers everything that the glass professional needs in his daily work,

all from a single source. No matter what challenges you are faced with - the Bohle modular

system offers you the elements that can advance you and your business.





5

Product Divisions

In the founding years, the Bohle product range consisted of cutting wheels for

glass cutters. Today it has grown to ten product divisions offering practically everything

required for working with glass in the trade and industry.

Glazing

Automatic

Glass Cutting

Surface

Technology

Manual Cutting

Technology

Grinding, Drilling,

Sawing

Machinery

Handling Glass

Bonding

Fittings





6

Trademarks

World's largest range of products for glass cutting and breaking

Lifting and carrying products from pump-activated suction lifters to industrial, quality lifting

systems

with a load capacity of several metric tons

Special glass cutters as well as a comprehensive range of diamond tools for

smaller machines

From UV adhesives to positioning and dispensing aids: all the products

needed to produce high quality, lasting glass bonds





7


Complete Solutions from One Source

▪ High precision cutting wheels made of carbide or PCD

▪ Top quality wheel holders made of plastic or steel

▪ Carbide axles for high-speed cutting

▪ Customer-specific shapes and grinds

▪ OEM for well-known cutting machine manufacturers

▪ Customised solutions on the spot





8

Decades of Experience

Core Competence Cutting Technology

Silberschnitt is one of the most important brand names in the field of flat glass cutting.

A long tradition in glass cutting and high standards in production quality

justify the strong position in the European market.

1923 First cutting wheel for glass cutting

1933 First manual glass cutter with the brand name Silberschnitt

1952 Carbide cutting wheels for automatic cutting

2001 Cutting wheels made of polycrystalline diamond (PCD)

2006 Cutmaster Gold wheels with 10-fold service life

2007 Cutmaster® Platinum microstructured wheels for

high precisionthin glass cutting by significant

reduction of edge damaging





9

Glass Cutting - Glass BreakingWhat happens when you cut glass?

▪Only when using an appropriate tool, it is guaranteed that the score is broken precisely

at the desired place.

▪By scoring the glass surface, tensions are transmitted into the glass which can then be

broken by bending it in a controlled manner either by hand or with glass breaking pliers





10

Required cutting force for different cutting angles

Obtuse angles have a larger contact area than acute

angles and therefore require a higher cutting force

Penetration depthmax. 0,2 mm





11

Compressive stress in the middle of the glass thickness

Penetration depthmax. 0,2 mm

Lower glass

edge

Upper glass

edge





12

Effects when cutting

Shatter area of score

GlassCrack

depth

Cutting edge

Accompanying

cracks

Cutting line

Inner tension

Fresh score Old score

Crack depth

Lateral crack

Shatter area of score

Quelle:H.Jebsen-Marwedel und K.von StösserGlastechnische Berichte 1939,

Side wings





13

Cutting Technology Today

Technology

Bohle has been developing and producing complete solutions for cutting machines for many years.

In cooperation with customers, cutting wheels for many different applications are produced in the

company-owned Research and Development Centre.

One of the latest developments is the structured cutting wheel with extraordinarily long service life.





14

Characteristic of grinds (roughness values)

Active

Basic

Contact

Plus





15

Cutting GlassManual Cutting

Automatic Cutting

Picture Intermac Picture LisecPicture IHegla Picture IHegla





16

Choosing the right glass cutter, holder and cutting wheel

depending on the glass thickness and type of cut

(straight or shaped cut)

Manual Cutting

▪Choice of glass cutter

Automatic Cutting

▪Existing cutting head

▪Handling , function, appearance ▪Selection of wheel holder





17


Online Cutting / Offline Cutting

▪ Depending on the existing cutting head

▪ Selection of wheel holder (insert)





18

It all comes down to the wheel!!

▪ Carbide wheels are made of especially selected carbide

ymaterial and guarantee a long service life

▪ For the use in machines, carbide wheels are

available in different sizes, thicknesses and cutting angles

▪ Excellent performance on specialized machinery

▪ Each cutting wheel is subject to careful inspection





19

Types of Cutting wheels

▪Tungsten Carbide

▪PCD Polycristalline Diamond





20

Glass Cutting Process

Online Cutting

Float production

Down drow process

Up drow process

Offline Cutting

Automotive

Cutting laminated glass

Standard cutting table





21

Online cutting

Picture

Grenzebach / Bottero





22

Pillar posts for float lines

436.220

436.200

439.1015

Pillar posts to fit plastic clips are also available from Bohle





23

Popular float lines in the marked

436.220L

436.200 439.1015

Grenzebach

Bottero

Iscan

Triumph, Tuscheng and other

436.220L

432.0 416.er422.0

432.0 416.er422.0

432.0 416.er





24

Automotive cutting

Picture BystronicPicture Benteler





25

Automotive Application

Different type of machines in the market

Bystronic432.0 422.0 422.1

Bando432.0

Olbricht432.0 422.0 422.1

Benteler422.0 422.1





26

Cutting of laminated glass

Picture Lisec





27

Cutting on Standard Cutting Tables

Picture Lisec Picture Bystronic

Picture Macotec Picture Intermac





28

Typical result, incorrect break





29






30






31






32


Oversize for grinding process will be required!

Cost for grinding will increase!





33

Correct cutting application, perfect break

Time saving for grinding > cost saving!!





34


Perfect breaking edge > cost saving!!





35






36

0.800.652,506

1.301.003.005

2.602.008.008

3.004.0012.564

1.603.006.063

1.551.146.007

1.301.005.613

1.421.085.603

1.301.005.002

1.421.084.112

1.301.004.004

0.800.653.066

Inner ØThicknessOuter Ø

Dimensions in mmArticle

No.

Cutting wheels - at a glance Tolerances

If you need special tolerances, we can manufacture these for you

on request





37

Cutting wheels - at a glance

Wheel type 03, 12 and 02

Any kind of angle can be delivered in

packing unit 10 and 100 pc





38

Important Parameters when cutting glass

▪ Shape of the cut

▪ Wheel diameter

▪ Cutting angle

▪ Cutting force

▪ Cutting speed

▪ Cutting fluid

▪ Type of Glass





39

Guidelines for choosing the right cutting angle

Straight cuts on standard cutting tables

Shaped cuts on standard cutting tables

Open cuts for automotive process





40

For straight cuts

Float glass

Wheel type 03

Ø 5,6 x 1,08 x Ø 1,42 mm

Glassthickness Cutting angle Grinding

0,8 - 1,0 mm 110° Basic

1,0 - 1,5 mm 120° Basic

1,5 - 2,0 mm 127° Basic

3,0 - 4,0 mm 135° Active

5,0 - 8,0 mm 145° Active

10 mm 150° Active

12 mm 155° Active

15 mm 155° Active

19 mm 160° Active






41

Glassthickness Angle Grinding

0,8 - 1,0 mm 115° Basic

1,0 - 1,5 mm 125° Basic

1,5 - 2,0 mm 130° Basic

3,0 - 4,0 mm 145° Active

5,0 - 8,0 mm 155° Active

10,0 mm 158° Active



19 - 25 mm 165° Active


For shaped cuts

When cutting shapes,

a smaller wheel diameter shouldbe chosen in general, e.g. type 12, (Ø 4,1 mm) for a glass thickness up to 8 mm.

For 10 mm glass thickness ormore, wheel type 03, (Ø 5,6 mm) is recommended.





42

Glassthickness Angle Grinding

2,0 mm 148° Active

3,0 mm 152° - 153° Active

4,0 mm 154° - 155° Active

5,0 mm 156° - 158° Active

6,0 mm 160° Active

8,0 mm 163° Active



For open cuts

To obtain an open cut, a smaller wheel diameter should be chosen in general, e.g. type 12, (Ø 4,1 mm) for a glass thickness up to 8 mm.

For 10 mm glass thickness

wheel type 03, (Ø 5,6 mm)

is recommended.





43

Lifespan of a wheel

Plastik Clip 10 25

Metal Holder 20 40

Lifetime in km

0 10 20 30 40 50

Lifetime in km

Metal Holder

Plastik Clip





44

Choosing the right cutting angle: Following basic rules apply

The thinner the glass and the more acute the cutting angle,

the lower the required cutting pressure (60 N – 10 N)

The thinner the glass, the finer the grind

The thinner the glass, the more acute (sharp) the cutting angle

should be (135° - 90°)





45

Vice Versa:

▪ The thicker the glass, the more obtuse (blunt) the cutting angle

aashould be (135° - 165°)

▪ The thicker the glass and the more obtuse the cutting angle,

bbthe higher the required cutting pressure. (60 N – 250 N)

▪ The thicker the glass, the coarser the grind should be





46

Polarization screen photo of a glass edge

145° F = 35 N

after 15 min145° F = 35 N


Snapshot right after cutting and holding time

Glass thickness 8 mm Glass thickness 8 mm Glass thickness 8 mm





47


Snapshot right after cutting.

With different cutting angles and corresponding cutting pressure.

120° F= 25 N 145° F= 35 N 157° F= 150 N

Glass thickness 8 mmGlass thickness 8 mmGlass thickness 8 mm





48

Edge quality using the same cutting angle but different cutting force (straight cutting)Clean edge with good breaking appearance

and only smallest notches caused by the

cutting wheel

Low quality cutting edge with prominent

notches and break-outs

Very bad quality cutting edge with prominent

notches, break-outs and scallops





49

Setup for the cutting machine, best breaking

performances with the correct cutting angle

Incorrect break (152° 6 mm Glass) Excellent break (156° 6 mm Glass)

Cutting angle to sharp, improvement only with Perfect rectangular edge easy work in the

blunter cutting angle and higher cutting force following grinding process





50

Positive effects when using cutting fluid

The cutting fluid lubricates the cutting wheel at the axle and the sides.

The cutting fluid binds small glass chips and stops them from moving onto the glass surface scratching the same.

The smoother the run of the wheel, the better the quality of the cut.

The cutting fluid penetrates into the smallest micro-fissures and stabilizes the built-up tensions for a longer period of time.

By wetting the cutting wheel with cutting fluid (with machines by continuous flushing), part of the glass dust is bound and flushed away.





51

Development of fissure after holding time

a ) 2 minutes

b) 4 minutes

c) 6 minutes

d) 8 minutes

e) 10 minutes





52


145° F = 35 N



Glasdicke 8 mm Glasdicke 8 mm Glasdicke 8 mm

Snapshot right after cutting and holding time Side wings





53

Latest Developments of Bohle

Cutmaster® Platinum The perfect solution for glass cutting

Precise glass penetration –

perfect edge quality.





Competitive Comparison

54

1:500 1:1000

What is different compared to standard cutting wheels?

The special structure displays a continuously sharp cutting edge over the entire

circumference

across the peaks as well as the recess areas.

This new cutting wheel achieves excellent cutting results due to its unique micro-

structure.





55

Penetration in the glass by Cutmaster®

PlatinumUnit : Micron





56

Cutting Wheels in Comparison

Cut Quality

Cutting pattern of the fissure at a cutting pressure of 12 N.

Silberschnitt Cutmaster® Platinum

1:2001:200

Standard Tungsten Carbide





57


Presentation of achieved Fractures

Appearance of fissures on a 1.1 mm thin glass panel.

Standard Tungsten Carbide Silberschnitt Cutmaster® Platinum

0.014 mm 0.03 mm

1:20 1:20 1:20

1:60 1:60 1:60





58


Presentation of achieved Fractures

Appearance of demmages in 8 mm float glass using a cutting angle of 145°.

.

Standard Tungsten Carbide Silberschnitt Cutmaster® Platinum

0.020 mm

1:20

1:60 1:600.10 mm

1:60

0.034 mm

0.26 mm

1:60





59

Normal Tungsten CarbideSilberschnitt Cutmaster® Platinum

1:500 1:500 1:750 1:750


Presentation of achieved fissures

Close-up of the different fractures on 8 mm float glass using a cutting angle of 145°.





60

1:500

1:1000


Close-up Fissures - Cutmaster® Platinum

Highly accurate cutting pattern without splinter formation. Precise penetration into the

glass. Minimal damage of the cutting edge. Regular, controlled intersection cuts in cutting

direction.

0.011mm

1:750






Close-up Fissures - Tungsten Carbide Wheel

Regular but rough cutting pattern. Serrated cutting edge. Erratic cutting fissure. Severe

damage of cutting edge. Excessive splinter formation

61

1:500 1:1000

0.025 mm





Applications of Cutmaster® Platinum

62

Thinglass

Shape cuts 0.1 – 2.0 mmStraight cutting 0.05 – 3 mm

Floatglass

Straight cutting 0.5 – 19 mm

Shape cuts 0.1 – 2.0 mm

Special Glass Types

Medical Glass

Optical Glass

Straight cutting of borosilicate glass up to 25 mmStraight cutting of diverse special glass type

Shape cuts over diverse special glass from 0.1 – 2.0 mm





63

Application cross cut, standard cutting wheel

scale up 60 x





64

Application cross cut, Cutmaster Platinum

scale up 60 x





65

Application cross cut, Cutmaster Platinum

scale up 750 xscale up 250 x





66

Cutmaster Platinum


Cutmaster Platinum

Standard

Standard





67


CMP cutting edge Standard cutting edge





68


CM

P c

utt

ing

ed

ge

Sta

nd

ard

cu

ttin

g e

dg

e





69

Comparison CMP® and standard wheels

Side wingsNo Side wings

No splinters (glass chips)





70

Approved applications of Cutmaster®

PlatinumApplication Glass Thickness Typ of Wheel

Float / Borofloat Substrate 0,5 - 1,2 mm 66B125P, 66B130P

Float / Borofloat Substrate 0,5 - 1,2 mm 66B120P

D 263 Substrate 0,05 - 0,21 mm 66B100P, 66B 110P

Borofloat Offline straight cutting 3 - 25 mm 66B125 -66B140

Float Offline straight cutting 3 - 19 mm 03A000P* 135 - 155°





71



Borofloat Substrate 1,1 mm 66B110P

Borofloat Offline straight cutting 5 - 7 mm 66B125, 66B135

Solarglass Solar-Panels 3 - 4 mm 66B125P

Schott B 270 Offline straight cutting 0,7 - 10 mm 66B125P

Ceran / Neoceran Offline straight cutting 3 - 6 mm 66B125P / 12A135P

Quarzglass Tubes 2 mm 66B140P





72



Float Offline straight cutting 1,6 - 2,5 mm 66A135P

Float Online 4 - 8 mm 12A135P, 12A145P

Float Substrate 1,2 mm 66B120P, 85D120P

Float Substrate 1,2 mm 66B120, 66B125P, 66B135P





Advantages at a glance from

Cutmaster® Platinum

73

Excellent edge quality

Minimal cutting force (thin glass cutting)

Minimal splintering

Longer service life

Dry cutting

Improved edge stability





Influences of cutting force dependent on the trim

74





75

Guidelines for choosing the right cutting angle in straight cutting

CMP Cutmaster Platinum Application

Glass thickness CMP application standard

1,5 - 2,5 mm 135° 120° - 130°

2,6 - 3,5 mm 145° 135°

4 mm 145° 135°

5 mm 148° 150° 145°

6 mm 148° 150° 145°

8 mm 150° 152° 155°

10 mm 155° 155°

12 mm 155° 158°





76

Choosing the wheel holder

▪ Plastic wheel holders for float glass cutting online as

well as for cutting tables offline

▪ Low price, colour-coded

▪ Inadequate stability when high cutting pressure is required

▪ Disadvantages:

▪ Axle can move out the holder

▪ Deficient precision

▪ Advantages:





77

▪ Cost factor, no color code for the cutting angle

▪ Disadvantages:

Choosing the wheel holder▪ Metal holders in the automotive industry, standard cutting

▪ Precise guidance, minimal tolerances, high stability with high

cutting pressures

▪ Dry cutting of coated glass panes or panes with a film

▪ Cutting wheels and axles are exchangeable

▪ Choosing the optimal wheel diameter.

▪ Advantages:





78

Position of the wheel in the wheel holder





79

Position of the wheel in the wheel holder

BO 438.114 Test pin

With the test pin Ø 1.14 mm it is possible to check the play in the slot

dimensions of wheel holders 432.0/ 432.1 / 422.0





80


Other types of machines in the market

Bottero, Rohmer & Stimpfig, Billco, AGC, others

Suitable System 432.0

Bohle always has the correct product available





81

Silberschnitt Quick Exchange Wheel Holders


Standard Version Quick Exchange





82

Silberschnitt Quick Exchange Wheel Holders

High precision, minimal tolerances, inherent stability under high cutting pressure

Easy exchange of cutting wheels and axles

Optimized cutting wheel diameter

Dry cutting of glass with films or other coatings

Quick exchange, minimal set-up times






83

▪ 03XxxxØ 5,6 x 1,08 x Ø 1,42

▪ 432.0 / 432.1 / 432.080

▪ 12XxxxØ 4,1 x 1,08 x Ø 1,42

Axle496.139FØ 1,39 x 4,2

Wheel holders and corresponding wheels





84

Wheel holders and suitable wheels for thinn glass

432.3

▪ 05Xxxx ▪ Ø 3,0 x 1,00 x Ø1,30

Axle496.130

Ø1,30 x 4,2

Axle496.080

Ø 0,80 x 4,2

▪ 66XxxxØ 3,0 x 0,65 x Ø 0,80

432.6

▪ 06XxxxØ 2,5 x 0,65 x Ø 0,80





85

Wheel holders and suitable wheels

▪ 03XxxxØ 5,6 x 1,08 x Ø1,42

▪

▪ 422.0

▪ 12XxxxØ 4,1 x 1,08 x Ø1,42

Axle496.422

Ø1,39 x 9,0

▪ 422.1

▪ 63Xxxx Ø 6,0 x 3,00 x Ø1,60

Axle496.160

Ø1,60 x 9,0





86

Module complete assembled

432.XXX1

Wheel type03

Ø 5,6 x 1,08 x Ø 1,42

432.XXX2

Wheel type12

Ø 4,1 x 1,08 x Ø 1,42

432.XXX3

Wheel type 05

Ø 3,0 x 1,00 x Ø 1,30

432.XXX6

Wheel type 66

Ø 3,0 x 0,65 x Ø 0,80

Dimension in mm





87

Available wheel holders (inserts)

Dimesions in mm

432.1351

wheel type 03

Ø 5,6 x 1,08 x Ø 1,42

cutting angle 135°

432.1352

wheel type 12

Ø 4,1 x 1,08 x Ø 1,42

cutting angle 135°

Following assembled

inserts with cutting angle

insription are available.

127°

134°

135°

140°

145°

148°

150°

152°

153°

154°

155°

156°

158°

160°

163°

165°

Completely assembled





88

Advantages of the Bohle Technology

Smaller wheel diameter » Less cutting pressure

and excellent edge quality «

Quick exchange wheel holders » Shorter machine downtime «

Compatible » Can be used on all machines «





89

References

Silberschnitt as OEM

Silberschnitt products are used for processing float glass and thin glass.

Leading companies of the flat glass industry use Bohle products as OEM.





90

Thank you for your attention.

Bohle AG

Dieselstraße 10

D-42781 Haan

Peter Pokoern

T +49 2129 5568 230

F +49 2129 5567 232Email:[email protected]





91

Germany

Bohle AG

Dieselstraße 10

D-42781 Haan

T +49 2129 5568-0

F +49 2129 5568-281

[email protected]

Austria

Bohle GmbH

Lemböckgasse 63/2/1

A-1230 Wien

T +43 1 804-4853-0

F +43 1 804-4853-33

[email protected]

UK and Ireland

Bohle Ltd.

Fifth Avenue

Tameside Park Dukinfiled

Cheshire · SK14 4PP

T +44 161 342 1100

F +44 161 344 0111

[email protected]

Estonia

Bohle OÜ

Punane 42 – 101

EE-13619 Tallinn

Tel.: +372 6112-826

Fax: +372 6112-790

[email protected]

Find your next Bohle location. Worldwide.





92


France

Département français

Dieselstraße 10

D-42781 Haan

T +49 2129 5568-222

F +49 2129 5568-281

[email protected]

Hungary

Bohle GmbH -

Forgalmazás HU

Lemböckgasse 63/2/1

A-1230 Wien

T +43 1 8044853-19

F +43 1 8044853-44

[email protected]

Italy

Bohle Italia s.r.l.

Via Cavallotti 28

I-20081 Abbiategrasso

T +39 02 9496-7790

F +39 02 9460-9011

[email protected]

Netherlands

Bohle Benelux B.V.

Nieuweweg Noord 314 B-20

NL-3905 LX Veenendaal

T +31 318 553151

F +31 318 519859

[email protected]





93


Russia

000 Bohle - Moskau

Leninsky Rayon

Business Center Rumjanzevo

Bldg. 1, Block A, Office 721 A,

RU-142784 Moscow

Tel.: +7 499 94094-04

Fax. +7 499 94093-93

[email protected]

Spain

Bohle Complementos del Vidrio

S.A.U.

Mare de Deu de Bellvitge, 312

E-08907 L'Hospitalet

Barcelona

T +34 90288-9119

F +34 90288-9118

[email protected]

Russia

000 Bohle – St. Petersburg

Ul. Bumazhnaya 9, korp. 1/A

Office 422

RU-198020 St. Petersburg

Tel.: +7 812 4452792

Fax: +7 812 4452793

[email protected]





94


Sweden

Bohle Scandinavia AB

Pyramidbacken 3

SE-14175 Kungens Kurva

T +46 8 44957-50

F +46 8 44957-59

[email protected]

USA

Bohle America, Inc.

13850 Ballantyne Corporate Place

Suite 500

Charlotte, NC 28277

T +1 704 887 3457

F +1 704 887 5201

[email protected]

South Africa

Bohle Glass Equipment (Pty) Ltd.

Unit 3, Graphite Industrial Park

Fabriek Street,

Strijdom Park 2125, Gauteng

T +27 11 792-6432

F +27 11 793-5634

[email protected]

presentation of the bohle ag about industrial glass ... 2 - peter... · manual cutting technology...

Documents