Optoelectronics Soda-Lime Glass Machining : Edge Grinding

🕜 Efficiency - enhanced 1.5x | 📈 Quality - all 400 pieces are well-maintained | ⚙️ Tool Life - enhanced 60%
  • Difficulties in Machining
  • HIT Achievements
  • Industry Application
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What makes Soda-Lime Glass difficult to machine?

Soda-lime glass is the most prevalent type of glass.  It is a combination of three basic components: silica, soda, and lime.  It has a variety of useful properties for applications across various industries.

Soda-lime glass is not as expensive as other glass materials, and has a nice material attribute of being good for recycling.

Though soda-lime glass is rated 6-7 on the Mohs hardness scale, it is vulnerable to thermal shocks.  Sudden changes in temperature could shatter soda-lime glass, which gives it certain difficulties during the machining process.  Especially for grinding on soda-lime glass, it might suffer from massive subsurface damage if the cutting force/heat are not well-controlled.

☑️ Soda-Lime Glass Machining Information

   Soda-Lime Glass Machining Information          
  Material   Soda-lime glass
*workpiece size : W150*L120*T1.22mm
  Feature   Radial depth of cut (Ae) 0.15mm
  Process   Edge grinding  
  Ultrasonic Tool Holder        HSKE40-R02-10
  Rotating Speed   20,000 ~ 22,000 rpm
  Tool Selection   #600 Metal bond grinding wheel


HSK-E40 ultrasonic toolholder was used on soda-lime glass edge grinding
(Figure 1. HSK-E40 ultrasonic toolholder was used on soda-lime glass edge grinding)

the schematic figure of soda-lime glass edge grinding workpiece
(Figure 2. the schematic figure of soda-lime glass edge grinding workpiece)


HIT's Goal in Machining Soda-Lime Glass

The goal is to raise the machining efficiency while maintaining acceptable workpiece quality (< 50µm).  The stability in tool life is also required to be improved.


Ultrasonic-Assisted Machining Soda-Lime Glass Results


Soda-Lime Glass Edge Grinding : Machining Efficiency

the machining efficiency was enhanced 1.5x with HIT Ultrasonic on edge grinding soda-lime glass
(Figure 3. the machining efficiency was enhanced 1.5x with HIT Ultrasonic on edge grinding soda-lime glass)

Conventionally, with such low spindle rotation (21,000rpm), it is impossible to raise the cutting speed and feed rate.  

With HIT Ultrasonic, even with low spindle rotation (21,000rpm), the cutting speed and feed rate can be raised 1.5 times faster than that without ultrasonic (under the circumstances of maintaining acceptable workpiece quality and the stability in tool life), resulting in the increase in the overall machining efficiency.


Soda-Lime Glass Edge Grinding : Workpiece Quality

Throughout the entire machining trials, HIT completed 400 pieces of edge grinding on soda-lime glass. 

All of which was measured and in compliance within customer's requirement on the quality (< 50µm).


Soda-Lime Glass Edge Grinding : Tool Life

the tool life was prolonged 60% with HIT Ultrasonic on edge grinding soda-lime glass
(Figure 4. the tool life was prolonged 60% with HIT Ultrasonic on edge grinding soda-lime glass)

With HIT Ultrasonic, the high frequency micro-vibration greatly helped improve the chip removal process

This allowed for the reduction in both cutting force and cutting heat, resulting in the improvement of 60% longer tool life (from 250 pcs/per tool to 400 pcs/per tool).


HIT Ultrasonic Machining Technology Achievements

🕜 Efficiency - enhanced 1.5 times faster
📈 Quality - all 400 pieces are well-maintained and in compliance with client's requirement
⚙️ Tool Life - enhanced 60%


Soda-Lime Glass Machining in Industry Application

Edge grinding Soda-Lime Glass is often applied in the Optoelectronics industry and Automotive Display industry, especially for the automotive display panels (instrument cluster display, center stack display, head-up display, etc.) for the high precision in-vehicle infotainment systems.

Taiwan is one of the Top 3 display panel manufacturer in the world and holds 25% of the automotive display panel global market share.

Automotive display panel is the key component of in-vehicle infotainment systems.  It has an increasing automotive applications due to the soaring demands in the EV (electric vehicles).  The applications include display panels on the rearview mirror, windows, and even door handles.

Industrial experts believe that the in-vehicle space for display panel will be expanding in the next few years.  The growing demands of automobiles (including EV) is also encouraging the manufacturers to upgrade their manufacturing facilities.

That was when HIT's Ultrasonic Machining Module came to help!  HIT offers a comprehensive solution in machining advanced materials.  With the assistance of HIT's Ultrasonic Machining Technology, clients stopped worrying about poor workpiece quality while trying to speed up the processing time.  The machining efficiency can be greatly enhanced while improving the stability in tool life.  HIT assures its clients of not only matching up with their requirements, but also achieving even better outcomes!

💡 Learn more about other Glass Machining cases

💡 Introduction on HIT Ultrasonic Machining on advanced materials