Pioneering the Future of Machine Tools

The delivery time for dedicated machine tools depends on the specifications, but basically, for a single machine, the production lead time is about 6 months from order to installation (for the domestic market).
For dedicated machines for multiple lines, such as transfer lines, the production lead time is 8 to 10 months.
Also, please take into consideration that specialized machine tools for overseas delivery require an additional 1 to 2 months for packaging, transportation, customs procedures, etc.

If the specifications of the specialized machine have been determined at the initial meeting, we will move on to detailed discussions immediately.
In this case, please allow about 2 weeks from the initial meeting to the submission of the quotation.

SAKURAI produces a large number of specialized multi-axis head milling machines that cut mainly motorcycle (motorcycle) and automobile parts.

Examples of past work include crankcases and heads for motorcycles, transmission cases and cylinder heads & blocks for 4-wheelers, and engine parts such as exhaust manifolds and connecting rods.
In addition to engine parts, we also have a lot of experience in machining steel drive and suspension parts such as axle shafts, hubs, axle cases, and front knuckles.

SAKURAI’s processing department uses the following list of in-house developed equipment.

• Rotary milling machine (milling machine for machining reference surfaces)
• Multi-axis drilling machine TURREX (Multi-axis head changer machine)
• Honing machine
• Valve finisher

The Turlex is a multi-axis machining center and has a production capacity equivalent to two to three machining centers.
By installing our own Turlex between the machining center and the machining center, our parts department has been able to reduce the number of workers and save space.
In addition, the use of Turlex for fine boring eliminates the risk of chip accumulation on the spindle during tool changeover, which is characteristic of machining centers, thereby reducing the risk of machining defects.

The line configuration using a dedicated machine is based on a comparison with a machining line consisting of highly versatile machining centers. Some automotive parts are suitable for machining by dedicated machines, while others are not.
Parts suited for dedicated machines include cylinder heads, cylinder blocks, ladder frames, transmission cases, and other products with a large number of holes to be machined.
When machining such parts on a machining center, the ratio of non-cutting time to cycle time, including tool change time, is high because machining is done one hole at a time, resulting in a dramatic decrease in line Also, in heavy cutting and finishing processes, it is difficult for machining center tools to provide the machine rigidity and machining flexibility required for special machining.
Therefore, for the machining of mass-produced parts that require heavy cutting and high-precision finishing, a line configuration centered on a machining center is difficult to achieve cycle time and stabilized machining accuracy.

The main components of a multi-axis head are roughly classified into the following six groups.

1. Body・・・・Body parts for fixing to the drive unit./li>
2. Plate・・・・Parts to fix the spindle and idle shaft.
3. Drive shaft・・・・Parts to transmit rotation from the motor to the idle shaft.
4. Idle shaft・・・・Parts to transmit rotation from drive shaft to spindle shaft.
5. Spindle shaft・・・・Spindle shaft is a part that fixes the blade and rotates at high speed to shave the workpiece.
6. Gear・・・Parts incorporated in drive shaft, idle shaft, and spindle shaft to transmit rotation from the motor to each shaft.

There are two types of lubrication methods: the oil bath type, in which oil is placed in the gearbox and circulated, and the mist type, in which a mist of air and oil is mixed to lubricate the gearbox.
Recently, mist lubrication has become the mainstream method to prevent coolant from entering multi-axis heads.

The pitch interval between holes depends on the size of the spindle.
For example, if the shank size of the drill used is Φ1 to Φ6, a pitch interval of 30 mm is required.
If the shank diameter of the drill is larger than Φ1 to Φ6, the pitch interval must be wider than 30mm.
There are various patterns, so please contact us for details.

In addition to drilling, tapping (cutting and thread rolling), reaming, rough boring, and fine boring, machining with side cutters is also possible.
Taps of different sizes and thread pitches can be mixed in the same multi-axis head.
Since the machine is driven by a gear train, the number of revolutions of each machining axis (spindle) can be designed as desired.
Center-through type multi-axis heads can also be manufactured.

When machining deep holes or Tap holes, it is possible to manufacture a head using the center-through method.
Two types of coolant through systems are available: a type with an additional dedicated plate and an inducer type.

The spindle speed of our standard head is 3,000 rpm. The spindle speed can be increased up to 10,000 rpm for the special high-speed multi-axis head.

As written below.

Standard head size(3 types)

1. H 400mm × W 500mm
2. H 450mm × W 550mm
3. H 500mm × W 600mm

1. H 300mm × W 400mm
2. H 350mm × W 450mm
3. H 400mm × W 500mm

The spindle speed of a multi-axis head is determined by the ratio of the gear train around the main axis.
Since multi-axis heads are designed exclusively for this purpose, the ratio of gears is designed to match the machining conditions of each axis when designing the head, and the spindle speed is determined by the ratio of the gears.