Precision machinery Tungsten Carbide grinding

1.Without polishing, near mirror finish surface (Ra<0.1m) 2.Processing efficiency increases 4 times, compared to EDM 3.Same processing method, efficiency increases 1.6 times 4.Reducing the processing procedures 5.Longer tool life by 4 times

Tungsten carbide Hi-efficiency performance bar chart

Process time bar chart compared HIT Ultrasonic Machining Module with EDM

HIT tungsten carbide h shape and threading features
Finished work peice contains H shape and threading features.

Highlight of HiT Ultrasonic Machining Module:
  • Great Surface Roughness after roughing (RA<0.1)
  • 4 Times Faster than EDM
  • Reduce Programming

The hardness of tungsten carbide causes lots of negative effects in using traditional machining, such as severe tool wear and chipped cutting surface.  

Electrical discharge machining requires expensive equipment and complicated  procedures. Though it’s seemed to be easy to machine tungsten carbide,  the subsequent CNC machining assistance is needed for precise feature machining.

In addition to the h shape feature processing, there is threading processing next to it. Processing this feature is time- consuming to electrical discharge machining since it requires multiple and repeated processing to reach the same feature.
With high frequency vibration, HIT ultrasonic machining module reduces the continuous wear between tool and materials so as to increase the tool life.

Every subtle vibration can remove materials slightly and make the machined surface become uniformed, thus enhancing the surface quality.

In the comparison to EDM, ultrasonic machining assisted processing reduces costs of equipment and time.

HIT Highlight and Comparison
HIT Ultrasonic
(Electrical Discharge Machine)
EDM Machine
Polishing  Tool*1
Gridding Machine*2
1 Operator/Equipment
1 Operator/Equipment
Within 6 tools.

More than 5 tools
4 electrodes
#4000 diamond paste*1
#2000 diamond wheel*2


Tungsten carbide is a sintered composite material containing at least one metal carbide, and it also known as cemented carbide. Due to its high hardness and good wear resistance, it has widely used in the military industry precision machining industry for molds and tools. 
In this case, we apply HIT Ultrasonic Machining Module to assist procedure of mold machining in automotive industry.  Compared with original electric discharge method, the machining results from ultrasonic machining increased efficiency to 4 times.  
In traditional machining, grinding wheels and tools are easy to wear because of tungsten carbide hardness property. The extremely hardness also has negative effects in cutting surface, causing chipped and broken edge.
Although electrical discharge machining can be used in feature machining, it takes a long time, high cost of labor and equipment, and requires machining assistance after completion. For all those reasons, it is not the best way to substitute traditional machining in tungsten carbide.