a92

a92

Introduction

The a92 horizontal machining center is designed for machining large structural components, made of tough-to-cut materials, for trucks, construction equipment, agricultural machinery, aircraft and other products. Its X-axis travel of 1,520 mm is ideal for machining the cylinder blocks of in-line 6-cylinder engines. The standard spindle produces powerful output of 45 kW, enabling the a92 to execute a wide range of machining jobs.

STRUCTURE

Dual ball screws and twin servomotors in the Z-axis
The Z-axis feed mechanism for moving the table longitudinally adopts dual ball screws and twin servomotors, enabling high-speed movement of large workpieces weighing up to 3,000 kg (optional specification).

Featuring a high-quality spindle
The standard spindle is capable of handling a wide variety of machining jobs, ranging from high-volume cast-iron parts for automobiles, construction equipment and agricultural machinery to steel and aluminum components. Providing powerful output of 45 kW, this high-quality spindle achieves low vibration to deliver superior machining quality. It also provides an optimum balance of impressive cutting capabilities in many different machining applications, including rigid tapping at 3,000 min-1.
 
Rapid traverse:
50 m/min
Top cutting feed:
50 m/min
Spindle speed range
20 – 10,000 min-1
Spindle drive motor (standard)
45/26 kW
(15 min/cont.)
Spindle bearing inner/outer diameter
110/170 mm
Spindle starting time
3.3 sec (10,000 min-1)
0.9 sec (5,000 min-1)
Spindle torque characteristic
623/305 N-m
(15% ED/cont.)
 
 

 

Ball screw cooling system
High speed movement of the ball screws during long hours of operation generates heat that can affect accuracy and machining performance. To eliminate thermal expansion, temperature controlled oil that’s matched to the bed temperature is circulated through the hollow ball screws.

MOTION
CONTROL

Control unit that maximizes machine performance
Professional 6 optimizes machine motion, according to machining conditions. Even in machining with high-speed and high-acceleration, machining surface quality and shape accuracy can be kept. Machining efficiency is totally enhanced. A variety of machining modes are preset. Operator can easily choose suitable one for its purpose.

Makino Professional 6 control unit

 

 

Advanced control technology (for reducing non-cutting time) 

Professional 6 advanced control technology


CHIP MANAGEMENT

The four following features indispensable to reliable chip
removal are all standard on the a92.

-8-nozzle coolant supply device
-Overhead shower coolant system
-Center chip trough
-Chip conveyor

 
High-speed machining generates incredibly large volumes of chips. To ensure reliable chip removal, nearly all the covers in the machining chamber are oriented vertically. Coolant is discharged from nozzles on the spindle head and ceiling to flush chips into the wide center chip trough positioned directly under the table. A filtration system built into the chip conveyor ensures a constant supply of clean coolant. All of these features are provided as standard equipment for thorough chip evacuation.
 
  Units a92
Travels X mm 1,520
Y mm 1,250
Z mm 1,350
Table Size mm 1000 x 800
Maximum work piece
weight
(evenly distributed)
kg 2,000
Spindle Taper - 7/24 No.50 taper
Speed mm 10000 min-1
Feedrates Rapid/Cutting mm/min 50,000
Automatic tool
changer
Tool Capacity - 40 tools
Machine Width x depth mm 5660 x 9330
Height mm 3,910
Weight kg 33,000