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SK7720D
REFNE
● Basic foundations like machine bed, table, wheel stock, headstock all are made of quality casting irons and have been well through by multi-aging treatments and manual scraping, to guarantee the machine’s moving accuracy and stability.
● Table reciprocating (to and fro, Z axis)directly driven by Siemens linear motor;
● Work spindle rotating(C axis)directly driven by Siemens torque motor; and the spindle supported by high-precision rolling bearings;
● Wheel stock cross feeding and retreating (X axis) driven by Siemens servo motor and precision ball screw;
● Wheel stock auto tilting (A axis) driven by Siemens servo motor and gear reduction system; helix angle once settled in the place, the wheel stock locking done automatically by hydraulic.
● Wheel spindle rotating driven by Siemens built-in permanent magnet synchronous motor, characterized with big power, low vibration and stepless speed regulation;
● Independent cooling system made up by magnetic separator for coolant filtering; oil cooler can be provided as an option (at extra cost) to cool down the oil temperature for a better grinding accuracy of worm parts.
● A full enclosure and a powerful oil-mist processor provided to prevent coolants splashing and oil polluting;
● Remote diagnosis and debugging and program upgrading for lifetime;
● Auto grinding wheel aligning can be provided (as an option at extra cost) for wheel auto aligning;
● Manual wheel aligning apparatus can be chosen as an option, to do wheel aligning operation for mass production;
● Wheel auto balancing system can be optioned.
Max. mounting diameter | 200mm |
Max. centre distance | 750mm |
Max. grinding diameter | 200mm |
Min. grinding diameter | 10mm |
Max. grinding length | 650mm |
Module range | 1~12π |
Max. lead | 150mm |
Helix angle range | ±40° |
Thread start number | 1~99 (any) |
Max. job weight | 25Kg |
No. | name | specification | quantity |
1 | Levelling wedges | 1 set | |
2 | Wheel flange | for 10mm wheel | 1 pc |
3 | Wheel flange | for 20mm wheel | 1 pc |
4 | Work spindle center | Morse 4 | 1 pc |
5 | Tailstock center | Morse 4 | 1 pc |
6 | Grinding wheel | φ500×φ203×10 | 1 pc |
7 | Grinding wheel | φ500×φ203×20 | 1 pc |
8 | Wheel flange extractor | 1 pc | |
9 | Flange nut extractor | 1 pc | |
10 | Measuring bridge | 1 pc | |
11 | Driving dog | 4 pcs | |
12 | wrench | 1 set | |
13 | Steady rest | 1 pc | |
14 | Wheel balance stand | 1 pc | |
15 | NC controller | Siemens 828D | 1 set |
16 | Electric cabinet | HJD01-21 | 1 set |
17 | Cabinet air conditioner | 1 pc | |
18 | Z-axis linear motor | Max.thrust 6900N (Siemens) | 1 pc |
19 | Z-axis grating scale | L=1040mm, 5µm (Fagor) | 1 pc |
20 | Z-axis linear guide | D35 roller type | 1 pc |
21 | C-axis torque motor | 231NM,358rpm (Siemens) | 1 pc |
22 | C-axis rotary encoder | ±5″ (Fagor) | 1 pc |
23 | X-axis servo motor | 2.29KW (Siemens) | 1 pc |
24 | X-axis ball screw | P1 class | 1 pc |
25 | X-axis grating scale | L=440mm, 5µm (Fagor) | 1 pc |
26 | A-axis servo motor | 43.3KW | 1 pc |
27 | A-axis rotary encoder | ±5″ (Fagor) | 1 pc |
28 | Wheel spindle synchronous motor | 26.4KW, 5900rpm (Siemens) | 1 pc |
29 | Dressing spindle servo motor | 0.8KW,3000rpm (siemens) | 1 pc |
30 | Cooling system | 1 set | |
31 | Oil-mist filter | Filtersmith (U.K) | 1 set |
32 | Hydraulic system | 1 set |