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Why cutting tools need to be reground?

Cutting tools reconditioning  make  cutting tool perform to its best performance time after time. Compared with purchasing new cutting tool products, metal grinding service can help customers reduce the cost of cutting tools by 50%. Take full advantage of the innovative technological advantages of cermet cutting tools , and at the same time, through the tool regrinding , the cutting tools can be restored to almost the same performance as when they were purchased.

Case of regrinding Cermet end mills

regrinding of cermet end mill

Condition of the cermet  tool being ground:Severe wear and tear, some end edges are chippedSevere wear and tear, some end edges are chipped

Regrinding steps:First, use 120# grinding wheel on the tool grinder to repair the original end edge, and then re-make the end edge and chip pocket

The processing parameters are as follows:

Grinder: Tuowa TW518

Grinding wheel:

3V1 100X31.75X10X4X45° D64-K5 for grinding chip pocket

3A1 resin diamond grinding wheel diamond grinding wheel for regrinding cermet inserts

 

11V9 100X31.75X4X10X35T D64-S Grinding the first relief angle and the second relief angle;

11v9 resin diamond wheel resin diamond grinding wheel for cermet tools relief grinding

Cooling: oil cooling;

Workpiece: 10mm four-blade cermet milling cutter;

Grinding parameters: chip flute: 3V1 grinding wheel, line speed: 18m/s; Feed: 10mm/min, horizontal pull: 8mm/min;

End blade relief angle: 11V9 grinding wheel, line speed: 21m/s; Feed: 1st relief angle feed and 2nd relief angle feed: 11mm/min

Grinding law of cermet materials:

1. After grinding all the deep cutting tools, the cutting speed is determined according to the power of the equipment and the characteristics of the material. Generally, it is one-half of the cutting speed of grinding carbide milling cutters of the same specification;

2. The chipping is related to the material properties of the bar, which can be solved by choosing different particle sizes;

3. Increase the pressure of the cooling oil in the grinding process to improve the cooling effect;

Commonly used grinding wheel specification drawings

Mold Drawing  Specification
1A1 1a1 drawing 1A1 D*T*H*X
D 100-400
X 3-25
T 3-50
1V1 1v1 diamon dgrinding wheel 1V1 D*T*H*X
D 100-400
X 3-8
T 3-35
3A1 3a1 3A1 D*T*H*X
D 100-400
X 3-10
T 5-50
14A1 14a1 14A1 D*T*H*X
D 100-400
X 3-10
T 5-50
11V9 11v9 11V9 D*T*H*X  
D 100-150
X 3-10
T 35-50
12V9 12v9 12V9 D*T*H*X  
D 100-150
X 1.5-3
T 20-25

Why choose Moresuperhard diamond grinding wheel for regrinding cermet cutting tools

1.With a high holding force, the metal matrix and the diamond particles can form an effective chemical-metallurgical bond.

2.The abrasive exposure rate is high, which can reach 70%-80%. Good machining accuracy.

3.Suitable for ultra-precision grinding operations with good accuracy and surface finish.

4.Service life increased by 2.5 times and MRR increased by 30%. Lower cutting specific energy and better heat dissipation are beneficial to reduce power loss and avoid burning workpieces.


TAG:  regrinding,丨resharpening丨cermetcuttingtools丨diamondflutingwheel
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