The pre-processing of tempered glass mainly includes glass cutting, glass edging, glass drilling, glass washing and so on. Glass edging is a very important process in glass deep processing. In this article, we will mainly introduce various aspects of glass edging. Whether you are a glass dealer or a glass processor, I believe this article will give you a more comprehensive understanding of glass edging. 

What is glass edging?

Glass edging is an edging process that performs secondary processing on the four edges and corners of the cut glass by manual or mechanical methods.

Purpose of glass edging

• Grind off the four edges and corners caused by cutting to prevent injury during use.
• The small cracks and micro-cracks formed by cutting on the edge of the glass are ground away to eliminate local stress concentration and increase the strength of the glass.
• Glass edging will reduce the occurrence of glass broken in the tempering furnace.
• The geometric shape and dimensional tolerance of the glass after edging meet the requirements.
• Different grades of quality processing are performed on the glass edge, that is, rough edging, fine edging and polishing.
• The need for glass glazing.

• Summary: Use glass safely, assure glass quality, adhere to glass appearance standards, and adhere to product assembly standards.

Glass size and thickness of glass edging

• The minimum processing width is 30mm
• The maximum processing width is 6000mm

• The above data is determined by the current Chinese glass edging equipment.

Glass edge types

Classified according to the geometry of the glass

• Flat Edge

• Pencil Edge

• Bevel Edge

• Ogee Edge

• 45 mitering edge

Classified according to glass processing technology

• Arrissed Edge
• Rough Edge
• Fine Edge
• Polished Edge

• Arrissed Edge

        a. Purpose of arrissed edge

• • Handling safety needs
  • Reduces need for tempered self-destruction

       b. Processing technology of arrissed edge

          Determined by the grinding wheel, under normal circumstances, the arrissed edge is 1-2mm, and the angle is 45° with the glass surface.

Arrissed Edge (Europe saying)

Rough Edge (White spots can be seen on the edges.)

Flat Ground Edge

Pencil Ground Edge

Fine Edge (No White spots on the edges.)

（4）Polished Edge

Note: Polishing is processed on the basis of fine grinding, rough grinding is not polished (according to process requirements)

Glass edge description

Process of glass edging

What is a glass edging machine?

Glass edging machine is a glass pre-processing equipment that realizes glass grinding and polishing mainly through grinding head motor and grinding wheel.

Glass edge processing machinery

Glass double edger machine

What’s glass double edger machine?

Glass double edging machine is a kind of glass grinding machine, and its work efficiency is much higher than glass single edger. Because glass double edging machine can complete the grinding and polishing of the upper and lower edges and the hemline edge of the two edges of the flat glass in one processing.

How does glass double edger machine work?

Glass double edging machine moves the flat glass forward through the clamping devices on the left and right sides, and the grinding device automatically grinds the two straight edges of the glass. The PLC control system is used to set the processing parameters through the interface to realize the rough grinding, fine grinding and polishing of the two sides of the rectangular glass at one time.

Glass double edger line

What’s glass double edger line?

Glass double edger line is generally composed of a glass detection table, two glass double edger machines, and one transfer table, which can be “L” shape or “I” shape . Grinding of four straight edges is completed at one time, with high production efficiency, suitable for large-scale glass edging production.

How does glass double edger line work?

Detection table has an efficient and accurate inspection system. The inspection system adopts PLC control system to measure the length, width and thickness of glass at one time. After the flat glass is placed on the detection table, the No. 1 glass double edger machine and No. 2 glass double edger machine receive the parameters of the detection table, and automatically adjust the width of the opening and closing, which can save the machine adjustment time. Glass double edger machine equipped with automatic centering rods to ensure the safety of the glass moving. The automatic transfer table is used as the transition connecting No. 1 glass double edger machine and No. 2 glass double edger machine, and it transfers the glass from No. 1 glass double edger machine to No. 2 glass double edger machine with high speed.

Glass single edging machine

What’s glass single edging machine?

Glass single edging machine is a device for grinding and polishing the hemline edge and upper and bottom edge of the one edge of of flat glass in one processing..

• According to the different functions, the glass single edging machine can be divided into: glass straight-line edging machine, glass pencil edging machine, glass straight-line beveling machine, glass mitering edging

Glass straight-line edging machine

Glass straight-line beveling machine

Glass mitering edging machine

• According to the different structure, the glass single edging machine can be divided into: chain structure glass edging machine, ball bearing glass edging machine.

How does glass single edging machine work?

Glass single edging machine grinds the one edge of the flat glass by clamping the glass at the front and rear platens and drives its linear motion, which can realize the rough grinding, fine grinding and polishing of the single edge of the rectangular glass at one time.

Glass seaming machine

What’s glass seaming machine?

Glass seaming machine can complete the rough edging of hemline edge and upper and bottom edge of the four edges of square glass or rectangular glass on one time, with high production efficiency.

How does glass seaming machine work?

The grinding wheel moves in sequence,

When processing the 1^st and 4^th edge, the glass does not move and the grinding head moves;

When processing the 2^nd and 3^rd edge, the grinding head does not move and the glass moves.

Glass shape edging machine

What’s glass shape edging machine?

Glass shape edging machine mainly deals with the edging and polishing of glass special-shaped edges, which belongs to a kind of glass edging machine.

How does glass shape edging machine work?

Glass shape edging machine uses vacuum to suck the glass on the suction cup, and is equipped with a motor to drive the turntable table or independently drive an independent turntable five-disc on the disk to rotate, so that the machine can process special-shaped flat glass with a rotating diameter of 700-2100mm or 100-700mm. The rotating speed of the turntable can be adjusted arbitrarily during work. This machine can also semi-automatically grind simple shaped special-shaped glass by using the air cylinder. When grinding the edges, three grinding wheels can be installed for rough, fine grinding and polishing. When grinding the bevel, install a bowl-shaped grinding wheel, tilt the grinding head backward, adjust the angle of the bevel, and grind the edge according.

Grinding wheel

Diamond wheel

Diamond wheel is made by fusing diamond and metal powder through high temperature and high pressure. It is mainly used for rough grinding in the first process of glass edging machine.

Flat edge diamond wheel

Pencil edge diamond wheel

Bevel edge diamond wheel

Ogee edge diamond wheel

Resin wheel

Resin wheel plays a great role in glass fine grinding, and is usually used behind the diamond wheel to remove marks.

Polishing wheel

Polishing wheel is made of different special materials, are used for glass edge polishing.

• BD wheel, only polishing function.

  BK wheel

• BK wheel, in addition to polishing, it also has a slight edge grinding function.

  BK wheel

• Wool wheel, using polishing powder to simply increase the brightness

  wool wheel

Glass chamfering

Purpose of glass chamfering

(1) The need for appearance grades

(2) Installation needs

(3) Handling safety needs

Classification of glass chamfering

(1) Safety Corner

(2) Round Corner (also called R corner, which is actually the radius of the arc)

(3) Bevel Corner (required for assembly only)

(4) Polished straight edge rounded corners (rounded corners with chamfering)

Glass chamfering process

(1) Safe chamfering with a hand grinder to gently rub off the glass

(2) Rounded corners and beveled corners can be done with a chamfering machine

(3) Polished straight edge rounds can be done using a glass double edger machine with chamfering function

Poor types of glass edging

Burned-out edge

Reason: the temperature is too high due to the lack of water when the grinding wheel rubs against the glass.

Suggestion: Mind that the water supply of the edge grinder is normal.

Burst edge

Reason: the grinding wheel is not sharp enough, or the thickness of the glass does not match the groove width of the grinding wheel.

Suggestion: it is recommended to replace the grinding wheel, or use the grinding wheel corresponding to the thickness of the glass.

Toothed edge

Reason: the grinding wheel has been used for a long time and the wear is serious, resulting in a gap between the glass and the grinding wheel, and resulting in a toothed edge of the glass.

Suggestion: it is recommended to adjust the position of the grinding wheel forward, or replace the grinding wheel, or use a spark machine to repair the wheel shape.