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Part 3 Double spindle introduction

- Nov 12, 2018 -

Spindle Synchronization

New to Haas is the full synchronization option of both spindles for part-off and on-the-fly pass-off of parts. This can also be achieved while cutting with constant surface speed.

“The main and secondary spindles have matching chucks and ample horsepower for those demanding operations where torque and horsepower are a must,” said Ramirez.

Another company introducing spindle synchronization technology is Nakamura-Tome.

Its new spindle synchronization capability is for both turning and C-axis milling modes and enables manufacturers to reduce the acceleration time by more than half while both of the machine’s spindles are attached to a long part.

“Historically this work needed to be high production in nature, like automotive, but we are seeing significantly more sales in the aerospace, commercial, and medical fields,” said Elliott-Matsuura Canada Applications Engineer Kevin Smith.

Elliott-Matsuura is the Canadian distributor of Nakamura-Tome equipment.

“Today’s two-spindle lathes can be very simple to automate, especially if they have both multiple turrets and spindles. A twin-spindle lathe can be automated quite simply by adding a bar loader and using the second spindle to basically complete the part,” said Smith.

A parts-removal system of some type is required to remove the finished product from the second spindle to allow for unattended machining. Also, if the part is larger than the maximum barstock size, then a gantry loader can be added to load and unload the second spindles in the machine envelope.

Multiple-turret Lathes

Adding turrets inside the work envelope enables more flexible machining. When more tools and options are integrated, lower-volume, high-variety parts can be produced economically.

“We sell more multi-turret Nakamura WT machines than we do single-turret machines,” said Smith. “This is based on customers seeing the benefit of a solid and technically advanced two-spindle, multi-turret lathe that reduces cycle time and changeover time.”

No matter the type of machine or the terminology used, a distinct competitive advantage can be gained from having more spindles working inside the machine.

“There is always a cost savings to having a second spindle in a machine,” said Smith. “If you manually handle a part less, you inevitably will lower the cost of the finished product and increase profits.”

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