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Sintered cutting plates |
Cutting plates for incisors with mechanical mounting of cutting plates made of material based on green rouge: "Bichromit-R" (à.ñ. USSR ¹175014, ¹1780284, ¹1676220), with high mechanical and cutting potential
| Table 1. Basic physic-mechanical characteristics of "Bichromit-R" plates | | Hardness, ÍRa | 92 ... 93 | | Hardness, GPA | 20 ... 21 | | Density, mg/m | 5,6 | | Compressing Density, ÌPà | 2600 ... 2800 | | Bending strength (Ò=20...9000C), MPa | 600 ... 800 | Thermo conductivity, Vt/mK | | 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.
| Òàble 2. Comparative characteristics of cutting process with steel 45 | Type | Producer | Cutting Modes | V, m/min | S, mm/turn | t, mm | Ò, min | | 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 |
| | Òàble 3. Some tool materials stability dependence (Ò,min) at steel ØÕ15 (HRC 60..62) turning on the cutting velocity (V,m/min). Cutting Modes: S=0.075 mm/turn, t=0.2 mm. | | Type | Producer | V, m/min | | 50 | 100 | 150 | 300 | CC620 | "Coromant", Sweden | 360 | 60 | 20 | 10 | ÂÎÊ71 | ÂÍÈÈÒÑ, Russia | 260 | 120 | 40 | 28 | Bichromit | "Cermet-U", Ukraine | 260 | 160 | 80 | 45 | HCI | "Ceramik", Japan | 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.
| 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 ÏÏ-ÀÍ-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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