Two spindles in a compact footprint

At the base of the specifications of the new s100 product line just unveiled by Bumotec, a simple idea: to create a product with maximum productivity in a minimal floor space. This while ensuring both quality of work and accuracy superior to the constraints of the watchmaking world. After 4 years of development, the s100mono and s100multi machines are being marketed and results exceed expectations. Meeting with Charles Dénervaud, responsible for marketing of the near-Fribourg based company.

Equipped with 2 electrospindles (max 60'000 rpm) and two systems to store tools, the s100mono maximises the use of hidden time.
Equipped with 2 electrospindles (max 60’000 rpm) and two systems to store tools, the s100mono maximises the use of hidden time.

Bumotec has developed a new concept of work with two spindles that is applied to several machines. The s100mono is a 3-linear-axis machining centre equipped with two working spindles. The s100multi machine has 4 workstations each with two spindles. In this case, the pallet holding the part moves from one position to another. The logic is the same as for a transfer machine. It is equipped with 144 tools, enabling significant gains on set-up times and unbeatable productivity. In this post, we will mainly talk about the s100mono version.

Lightning accelerations and maximised productivity
The machine is able to offer accelerations of more than 3 G (tested up to 5G). Our interlocutor says: “All the elements of the machine are known and proven. It offers a lot of possibilities and we discover new applications or methods enabling significant productivity gains every day”. And if nowadays the tools are not designed to work under those extreme conditions, it is evident that trends moves toward that direction and Bumotec is already prepared. To be able to control such a reactive machine, the company chose the Bosch Rexroth MTX Performance NC.

To benefit of hidden time to the maximum
In comparison with a classical single spindle machine, tests show very important cycle times improvements. When one requires 13 minutes with this technology, the s100 mono machine needs less than 8 minutes and an s100 multi only needs 2 minutes.

Comparison of cycle times between classical machining (one spindle) and the Bumotce S100mono and S100multi. In addition to high machine dynamics, it is mostly hidden time use which enables such gains. With two spindles, all tools changes or tools probing controls are conducted, while the second spindle is working.
Comparison of cycle times between classical machining (one spindle) and the Bumotec S100mono and S100multi. In addition to high machine dynamics, it is mostly hidden time use which enables such gains. With two spindles, all tools changes or tools probing controls are conducted while the second spindle is working.
In the case of realisation of larger series of parts or parts that require many operations, the s100multi combines four workstations identical to the s100mono version in a compact transfer centre.
In the case of realisation of larger series of parts or parts that require many operations, the s100multi combines four workstations identical to the s100mono version in a compact transfer centre.

Next opportunity to meet the specialists of Bumotec and to discover this new solution are Prodex (halle 1.0, stand B19) and Baselworld in early 2015 (Halle 4U, Stand E11).

Looking for a productive solution that does not require much space?

Bumotec SA
Route du Rontet 17
1625 Sâles
Suisse
T +41 26 351 00 00
F +41 26 351 00 99
[email protected]
www.bumotec.ch

We will go into deeper details of the new S100mono machine in our next issue.

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