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Selection of grinding wheel for sharpening

2022-08-08 12:50:20
One of the purposes of cutting tool sharpening is to obtain cost-effective cutting edge quality, and the key to quality is the choice of the size of the grinding wheels. 
The finer the grinding wheel particle size, the smaller the cutting edge chipping, and the lower the grinding efficiency. For this reason, the PCD cutting tool sharpening process can be divided into three processing stages: rough, medium, and fine according to the accuracy of the cutting edge of the tool, its purpose (see Table 1) or its failure degree (see Table 2). Formulating a reasonable sharpening process according to specific conditions can greatly improve processing efficiency.

Grain size

Cutting edge accuracy

Grain size

Application

A (rough)

0.05mm

230/270#~320/400#

Rough grinding

B (medium)

0.02mm

M20~M40

Medium grinding

C (finish)

0.005mm

M5~M10

Finish grinding

vitrified diamond wheels

 

Table1 Classified by cutting edge accuracy and usage

Serial number

Degree of failure

Grain size

Remarks

A (rough)

Broken cutting edge 0.5mm

230/270#~320/400#

Or electroprocessing

B (medium)

Cutting edge burst 0.3mm

M20~M40

 

C (finish)

Cutting edge wear 0.1mm

M5~M10

 

Table 2 Classification by the degree of cutting tools failure

Rough machining does not require high cutting edge, and electrical machining or grinding can be selected. The electrical processing efficiency is high, and it is suitable for processing complex tools, such as drill bits for printed circuit boards, forming milling cutters for cutting laminate flooring, etc. Coarse-grained grinding wheel can be selected for grinding, with large contact area and high grinding force (300～400N) during sharpening, which can quickly remove excess machining allowance.

 


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