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» Production » Sintered cutting plates
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Sintered cutting plates
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Cutting plates for incisors with mechanical mounting of cutting plates made of material based on green rouge: "Bichromit-R" (а.с. USSR №175014, №1780284, №1676220), with high mechanical and cutting potential
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Table 1. Basic physic-mechanical characteristics of "Bichromit-R" plates
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| Hardness, НRa |
92 ... 93 |
| Hardness, GPA |
20 ... 21 |
| Density, mg/m |
5,6 |
| Compressing Density, МPа |
2600 ... 2800 |
| Bending strength (Т=20...9000C), MPa |
600 ... 800 |
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Thermo conductivity, Vt/mK
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| at 220C |
28 |
| at 4000C |
35 |
| Elasticity coefficient |
350 |
| Stress intensity factor, K1c.Mn3/2 |
6,5 ... 8 |
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The tool equipped with these plates due to higher thermal and wearing endurance makes possible using higher cutting velocity. Plates have a slight trend to be wrapped with the processed material, but have a good abrasion-resistance and wearing endurance.
| Таble 2. Comparative characteristics of cutting process with steel 45 |
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Type
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Producer
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Cutting Modes
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V, m/min
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S, mm/turn
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t, mm
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Т, min
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| CMI |
"Walter", Germany |
300 |
0,075 |
0,5 |
35 |
| CC620 |
"Coromant", Sweden |
350 |
0,075 |
0,5 |
40 |
| Bichromit |
"Cermet-U", Ukraine |
350 |
0,075 |
0,5 |
38 |
| ICM |
ICM Ukraine |
400 |
0,1 |
0,5 |
35 |
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Таble 3. Some tool materials stability dependence (Т,min) at steel ШХ15 (HRC 60..62) turning on the cutting velocity (V,m/min). Cutting Modes: S=0.075 mm/turn, t=0.2 mm.
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| Type |
Producer |
V, m/min |
| 50 |
100 |
150 |
300 |
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CC620
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"Coromant", Sweden
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360 |
60 |
20 |
10 |
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ВОК71
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ВНИИТС, Russia
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260 |
120 |
40 |
28 |
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Bichromit
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"Cermet-U", Ukraine
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260 |
160 |
80 |
45 |
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HCI
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"Ceramik", Japan
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280 |
175 |
60 |
30 |
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According to these tables one can see the comparative characteristics of "Bichromit-R" with other forms of plates during the processing of average hardness steels, and the significant advantage in steel processing at high cutting velocity, providing a high processing surface cleanness.
Cutting plates are made in unreface plate form and have a shape and sizes according to the All- Union State Standards. Mounting method is mechanical, without holes. The plates can be produced according to the orderer's shape and sizes.
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Conditions recommended for different materials cutting with the help of cutting plates made of "Bichromit-R" at:
1. Steel processing:
- High-speed finishing, half-finishing, discrete turning of hardened chemically processed carbon alloyed stainless steels HRC 60-64.
Cutting conditions:
V=100-200 m/min, t=0,1-1 mm, s=0,07-0,11 mm/turn;
- Ultraspeed steel turning HRC 50-54.
- Cutting conditions:
V=100-600 m/min, t=0,2-1,5 mm, s=0,07-0,11 mm/turn;
- Roughing steel processing;
- Finishing hardened steel processing Ra 0,63-0,7;
2. Cast iron processing including high-tensile white ones:
- finishing processing.
- Cutting conditions:
- V=300-800 m/min, t=0,2-0,4 mm, s=0,07-0,11 mm/turn;
- roughing processing.
- Cutting conditions:
- V=120-250 m/min, t=1-3 mm, s=0,2-0,5 mm/turn;
3. Surfacing processing (wire ПП-АН-100):
- finishing.
- Cutting conditions:
- V=80-120 m/min, t=0,2-0,6 mm, s= 0,11 mm/turn;
Nowadays we continue to improve the plates cutting characteristics due to the perfection of the producing technology of ''Bichromit-R'' made plates. |
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