V77 ● V77L

Makino V77L vertical machining center

Introduction

The V77 vertical machining center has Y-axis travel of 700 mm, accommodates workpieces weighing up to 2.5 tons and delivers micron-level accuracy.

The V77L provides the same high-speed, high-accuracy machining as the V77 for workpieces that are one size larger.


STRUCTURE

Sliding guideways with outstanding vibration damping are used in the X・Z-axes to ensure stable machining unaffected by cutting vibrations. The Y-axis features twin motors, twin ball screws and rolling guideways for fast acceleration and deceleration even with heavy workpieces on the table. The axis layout is designed without any overhangs to ensure high accuracy over the entire range of travel.

 
A high-quality spindle for polish-free machining of dies and molds

Makino’s high-speed spindles boast an overwhelming record of shipments to date. Makino’s commitment to in-house development of spindles that serve as the heart of machining centers is unmatched by any other machine tool maker.

With minimal deflection and vibration, the spindle ensures precision surface finishes of uniformly high quality. Only Makino machining centers feature a spindle core cooling system that keeps the spindle temperature constant regardless of the operating conditions. This system suppresses spindle growth due to heat generation and spindle deflection resulting from variation in the pre-pressure applied to the bearings.

The difference in the surface finish is obvious at a glance. Makino’s high-quality spindle delivers polish-free product surfaces, adjustment-free parting lines and no level differences between areas machined with different tools.

Spindle vibration:
Less than 3μm (actual measured value)
Spindle thermal distortion ripple:
±1μm (actual measured value)
Spindle Variations:
No. 40 taper
20,000min-1
30,000min-1
(high-speed spindle; optional specification)
No. 50 taper
12,000min-1
18,000min-1
(high-speed spindle; optional specification)
 


MOTION
CONTROL

Improved grade of finished surface
Streaks and scratches that may occur in axis turn sections are minimized in low to high speed ranges, so that the polishing and adjustment works are reduced.

Automatic optimizing function
Optimum control commands are specified to compensate effects of variations of workpiece weight and mounting position on the accuracy and cutting feedrate.

 

v33i p6

 



ACCURACY &
TEMP
CONTROL

Measure against ambient temperature changes
In installation environments with a low ceiling height, accuracy is apt to be affected by a warm air layer that stagnates above the machine. Makino’s Thermal Guard (optional) covers the entire machine to keep out ambient air and prevent altitude changes.

 

  Units V77 V77L
Travels X mm 1200 1500
Y mm 700
Z mm 650
Table Size mm 1400 x 700 1650 x 700
Maximum work piece
weight
(evenly distributed)
kg 2500                  2000
Spindle Taper (Option) - 7/24 No.50
taper
7/24 No.40
taper
Speed mm-1 12,000 min-1
(18,000 min-1)
20,000 min-1
(30,000 min-1)
Feedrates Rapid/Cutting mm/min 20,000
Automatic tool
changer
Tool Capacity - 20 tools (standard),
30, 40, 60, 80 tools (optional)
Machine Width x depth mm 3805 x 3960 4150 x 3833
Height mm 3300
Weight kg 16,500 17,500