Challenge: Grinding cermet round bars with centerless grinding wheels

Cermet boasts superior hot hardness, yet this property also makes it much harder to grind.

This paper presents performance tests on our company’s centerless grinding wheels developed for machining cermet round bars. The test details are as follows:

Test equipment: 1040 centerless grinder manufactured by Wuhu Zhongchi 

Grinding Wheel specification: 1A1 350×127×10×125, 120#, special for cermet 

Workpiece specification: φ10×100 mm 

Workpiece material: DTN680 

Machining parameters: Stock removal of 0.06 mm per pass; 

Traverse speed 250 mm/min 

Machining accuracy: End-to-end runout of ground bars ≤0.001 mm

This type of centerless grinding wheel is also suitable for cemented carbide.

Relevant machining parameters: 

Workpiece specification: Cemented carbide bar φ20×180 mm 

Grinding parameters: Stock removal of 0.08 mm per pass; 

Traverse speed 250 mm/min 

Machining accuracy: End-to-end runout of ground bars ≤1 μm

Compared with the grinding wheels previously used by the customer, the test results show a 50%~200% efficiency improvement, and the product has gained customer recognition.