Technical Parameters
|
Item
|
Value
|
|
Diameter Range of Workpiece
|
φ90～φ900 mm
|
|
Grinding Length
|
3500 mm
|
|
Center Height
|
460mm
|
|
Maximum Distance Between Centers
|
3500mm
|
|
Width of Table Top
|
540mm
|
|
Headstock Center
|
Metric80
|
|
Tailstock Center
|
Metric80
|
|
Load Capacity
|
3500kg
|
|
Size of Dog Chuck on Workhead
|
630mm
|
|
Hollow in Spindle
|
300mm
|
|
Minimum Manual Feed
|
0.0025mm
|
|
Automatic Periodic Minimum Feed
|
0.0025 mm
|
|
Workhead Speed
|
18～50r/min
|
|
Lengthways Travel of Table
|
3600mm
|
|
Maximum Rotation Angle of Upper Table
|
Clockwise: 2°
|
|
|
Anticlockwise: 3°
|
|
Grinding Wheel Size
|
φ750×80×φ300
|
|
Rotation Linear Speed of Grinding Wheel
|
35 m/s
|
|
Grinding Wheel Speed
|
850r/min
|
|
Maximum Amount of Movement of Grinding Carriage
|
350mm
|
|
Fast Feed Rate of Grinding Carriage
|
100mm
|
|
Amount of Movement of Grinding Carriage: Hand Wheel One Round
|
Coarse: 0.4mm
|
|
|
Fine: 0.05mm
|
|
Amount of Movement of Grinding Carriage: Hand Wheel One Step
|
Coarse: 0.02mm
|
|
|
Fine: 0.0025mm
|
|
Oil Pump Displacement
|
25L/min
|
|
Cooling Liquid Flow
|
50L/min
|
|
Workhead Motor Capacity
|
2.2/3.6kw
|
|
Grinding Wheel Motor Capacity
|
18.5kw
|
|
Dimensions (LxWxH)
|
10500×2200×2100mm
|
|
Weight
|
12,350kg
|
Working Conditions and Manufacturing Standards
(1) Working Conditions
Network voltage: three phase current 380V±10%, 50HZ±1%
Electrical system: three-phase four-wire system
Wire diameter: ≥4mm²
Working environment temperature: 0º～40ºC
Working environment humidity: ≤90%
(2) Manufacturing Reference Standards
GB/T4685-2007 Cylindrical Grinding Machine Precision Requirements
JB/T7418.2-2007 General Technical Specification for Cylindrical Grinding Machine
GB5226.1-2008 Safety of Machinery & Electrical Equipment of Machines—General Requirements
GB/T9061—2006 General Specifications for Metal-Cutting Machine Tools
JB4029—2000 Safety Protection Requirements for the Protective Cover of the Cylindrical Grinding Machine Grinding Wheel
Other relevant national standards and industrial standards.
Introduction About the Main Components of the Grinder
(1) Lathe Bed
The lathe bed is of integral structure. The inside rib plate is of box layout. The bed is made of high-strength inoculated cast iron HT250 which is put through special treatment processes and is with high rigidity & stability, surface wear resistance and shock resistance. The bed can ensure that the equipment will maintain the required technical precision and stability under long-time running. Before assembly, we will conduct penetration & leakage test of the bed.
(2) Grinding Carriage and Feed System
The grinding carriage is made of high-strength inoculated cast iron HT250 which undergoes special treatment processes and is with high rigidity & stability. The spindle system adopts two sets of split sleeve dynamic pressure bearing and is with high precision and good rigidity. We use special technology to maintain the balance and stress correspondence of the two sets of bearing bushes, thus ensure that the spindle of the grinding wheel can keep high rotation accuracy and working stability in the process of long-time grinding.
We also implement high filtration precision measures on the lubrication oil of the spindle grease-box, to control the oil temperature of the spindle system, thus achieve the overall stability of the grinding carriage, and the spindle system will work under the specified technical parameters all the time. The consistent size precision of the workpiece is thus realized. The maintenance and adjustment of the spindle system is convenient and reliable. While doing grinding on the workpiece, the feed of the grinding carriage can be manual or automatic. Both manual feed and automatic feed consist of two modes: coarse and fine.
(3) Lathe Table
The lathe table adopts two-layer structure: upper layer and lower layer, in order that you can adjust the cone angle of the workpiece. The moving of the table is driven by oil cylinder. You can achieve stageless adjustment of the moving speed. Or you can also move the table by turning the hand wheel.
(4) Tailstock
The movement of the tailstock is of manual control. The amount of movement is 70mm.
(5) Grinding Wheel Dresser
The dresser is of single point. It is fixed on the proper location of the lathe table.
(6) Hydraulic System
The advance and return movement of the lathe table, the fast-forward fast-backward movement and periodic feed of the grinding carriage, the anti-backlash of the feeding screw-nut of the grinding carriage, fore and aft motion of the tailstock sleeve, the automatic and manual switch movement of the lathe table, and the lubrication of the driving medium such as slideway, nut and gear etc. are all carried out by the hydraulic system. The hydraulic oil pump is internal gear pump. The hydraulic oil is 46# anti-wear hydraulic oil.
(7) Cooling System
The cooling system of the lathe is of independent circulating filtration. It fully meets the requirement of continuous high-efficiency grinding and ensures the grinding quality.
(8) Protection System
The lathe is equipped with semi-enclosed protective device, to prevent the splash of the cooling liquid, and ensure the cleanness of the working environment and the health of the operator.
(9) Electric System
The lathe is endowed with functionalities such as interlock, safety guard etc. The protection class of the electric cabinet is IP54.
There are isolation measures between different electric cabinets and strong and week power systems. The electric cabinet is independent and is integrated with the lathe. It is equipped with 220V power socket and temperature control device. The electric components bear clear permanent labels or signs. Wiring inside the lathe uses water-resistant junction boxes. The terminals bear clear labels or signs. The current of solenoid valve contactor is DC24V. The current of lighting lamp is AC24V. The main electric components (button, switch, etc) are either imported or of famous Chinese brands.
Main accessories
Complete set of electric equipment
Cooling equipment 1 Set
Grinding wheel dresser 1 Set
Grinding wheel flange plate 1 PC
Grinding wheel trunnion shaft 1 Set
Sizing block of lathe Complete set
Additional Advantages
The lathe table uses hydrostatic slideway. The flow of each hydrostatic oil chamber is adjustable. The overall buoyancy lift of the table is adjustable. Between the table slideway and base slideway there is one layer of oil film and a buoyancy lift of 2-3um. A 5-ton workpiece can be moved easily on top of it.
The spindle of the grinding carriage is hydrodynamic-hydrostatic. When the spindle rotates, it floats inside the wheel sleeve under the support of a 20-30 KG oil pressure. The grinding carriage is equipped with independent grease box. The oil goes through several layers of filtration, so that it can stay clean all the time. Oil cooler is equipped as well to control the oil temperature. This type of spindle has the characteristic of high rigidity and high precision.
