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Posted by Electromechanical Team on 24 Jul 2018
Modern Swiss-type lathes have evolved from simple screw machines to high-precision, high-production machines and are now widely used across many industries to completely machine small parts, even for complex operations where no turning is required.
Whereas a conventional CNC lathe has two, three or four axes, a Swiss-type lathe is an entirely different proposition having up to 13 axes. This makes it possible to machine highly complex components in a single set-up, compared with multiple set-ups using conventional lathes. So why not apply this thinking to a multi-spindle Swiss-type lathe? After all, such a strategy would multiply the benefits in proportion to the number of additional spindles deployed. While this statement is true enough, more spindles means that space becomes a premium commodity which demands clever design and compact spindle motor technology. After all, in a highly competitive global marketplace, every square metre in today’s manufacturing shops carries a cost.
One machine tool manufacturer, however, has found a way around this issue. When Tornos, a leading specialist in Swiss-type lathes, wanted to bridge the gap between single-spindle and multi-spindle machines, it turned to Parker’s permanent magnet synchronous motor technology to reduce the amount of space required to position components and cutting tools and, in so doing, increase productivity in the next-generation design of Swiss-type lathes.
Equipped with eight spindles and eight slides for main operations, and accommodating up to three tools per slide, the Tornos MultiSwiss 8x26 features eight SKW frameless spindle servo motors from Parker and fast barrel indexing for producing turned parts up to 26mm in diameter. Each of the 11kW motor spindles is equipped with a C axis and counter spindle. Reaching speeds of 8,000 rpm in tenths of a second, the motors make a major contribution to performance and productivity, as well as space economy.
Comprising two separate elements (rotor and stator), SKW motors are integrated directly into the mechanical structure of the MultiSwiss. Compact, reliable and highly dynamic, the motors offer constant torque capabilities over a wide speed range with very small dimensions. Indeed, the space-saving design gave Tornos the flexibility to fit eight spindles into the MultiSwiss without sacrificing any of the high-precision benefits that come with permanent magnet synchronous motors.
As part of a collaborative, partner-based project, Parker supplied Tornos with a complete bespoke spindle motor solution, including a cooling system and sensor equipment. Parker’s long-standing relationship with Tornos has existed since 2005 and received the following endorsement:
“With the high-performance output of Tornos’ machines in mind, the quality and reliability of Parker’s solutions make the collaboration a good fit. We appreciate the close cooperation in terms of both commercial and technical aspects. We also benefit from Parker’s strong commitment with regard to after-sales support and enjoy the close contact and cooperation with their research and development department. Over time, this has meant Parker has turned out to be not only a reliable supplier but also a trustworthy partner.” Bertrand Faivre, Engineering Manager R&D at Tornos
To find out more about the latest Parker spindle motor solutions for machine tools, please click here.
Article contributed by Michel Finck, market development manager, Electromechanical & Drives Division Europe.
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The renewal of the entire ventilation system in the underground car park serving the largest European business district, was not limited to the simple replacement of filters and some mechanical components. This operation involved a vast project requiring advanced technical expertise, particularly in terms of defining and selecting drive solutions and supporting their integration, installation and commissioning.
The objective of the drive systems for the variation of ventilation speed was two-fold. Firstly, it was a question of ensuring the effective evacuation of exhaust gases. Then, secondly, achieving much faster removal of smoke in the event of a fire. The previously installed system had become obsolete because it was only equipped with two-speed motors without drives.
Parker worked with EDF and Inov Industrie on the project. The company was selected for its technical abilities with respect to drive systems, but perhaps more importantly, for its "know how" in the control of energy consumption/optimisation of energy efficiency. The project presented multiple challenges that had to be overcome. First, the project concerned the most extensive car park in Europe incorporating 22,000 spaces, spread over sixteen different sites. Then, due to the underground location of the car parks, below the towers of La Defense at a complex, major road junction, there were numerous access constraints. To this was added the problem of dimensions: the systems selected had to fit in existing cabinets and be adapted to the protocol already in place.
All of the disassembled components being replaced had to be removed and recycled. Finally, and perhaps most importantly, the fire safety system needed to allow the forced operation of the drives at maximum speed in order to reliably evacuate fumes in the shortest possible time. For safety, the new systems also needed to be equipped with an automatic restart and be directly connected to the emergency fire services.
The nature of the project meant that work had to be completed quickly and efficiently under intense time pressure. The scale of the project meant that a total of 60 drives with power ratings from 5.5kW to 180kW had to be commissioned in a very short space of time. Inov Industrie, with its 20-year working relationship with Parker, turned to the motion and control specialist, opting to specify units from the company’s AC10 compact drive range.
The suitability of the AC10 range for this significant and challenging project was enhanced due to some new features such as fire mode input/output and its wide range of power ratings - all in a compact package. The AC10 range is characterised by its simplicity of installation, setup, and commissioning, thanks in particular to a fast parameterization. With its enhanced functionality, the AC10 drive is able to control asynchronous motors incorporating both simple and complex types of application such as pressure and flow control. The ‘small sequential’ function (sequencing on and off) avoids the need for an additional PLC. It is also possible to obtain information relating to system power consumption and other parameters such as the occurrence of dirty filters.
Article contributed by Francis Scharwatt, sales engineer, Parker Hannifin France
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The suitability of the AC10 range for this significant and challenging project was enhanced due to some new features such as fire mode input/output and its wide range of power ratings - all in a compact package. The AC10 range is characterised by its simplicity of installation, setup and commissioning, thanks in particular to a fast parameterization. With its enhanced functionality, the AC10 drive is able to control asynchronous motors incorporating both simple and complex types of application such as pressure and flow control. The ‘small sequential’ function (sequencing on and off) avoids the need for an additional PLC. It is also possible to obtain information relating to system power consumption and other parameters such as the occurrence of dirty filters.
Maintaining a safe and productive work environment should be top priority in any facility. More and more companies are putting programs in place to improve the working environment and thereby increase the performance of workers.
Audible noise is one of the factors most commonly present on the manufacturing floor, since the operation of any equipment or machinery involves the generation of noise at some level. Usually, the lower the technology of the equipment, the greater the intensity of the noise emitted, reaching in some cases to exceed the tolerable or legally allowed levels.
In addition to the risk of hearing loss, excessive noise has been known to cause physiological effects such as fatigue, tinnitus, lack of concentration and stress, even at levels well below 85 decibels (dB). Keeping people working in environments with excessive noise is a safe bet for reduced productivity and lost time.
Excessive noise exposure can be mitigated by addressing several elements. The actions for noise control can be classified according to the element on which they are carried out:
Directly reducing the noise generated by the source is the ideal option because it eliminates the need to add elements external to the process and results in a more efficient operation, but can potentially require more initial investment. Among the actions of this type we find:
When it is not possible to act on the noise source, or the reduction reached is not enough, it is possible to alter the propagation medium to reduce the sound effect. These actions have the advantage of being able to be carried out without modifications to the production process, representing a fairly low implementation risk. Among these actions we have:
The noise control actions in the receiver must be the last ones due to the inconvenience that it generates for the worker and the consequential reduction of the effectiveness of oral communication. These actions are typically:
Parker's t-slot aluminum profile system (IPS) is an excellent solution for the manufacturing of enclosure cabinets and noise reduction barriers. The flexibility of the system allows adaptation of the design to the specific geometry of the machine and provides semi-fixed sections that facilitate access for operation and maintenance.
The wide selection of panels allows to have opaque or transparent walls and profiles with double grooves allow the easy fabrication of walls with double panels that increase the attenuation of the noise.
Parker IPS profiles are easy to modify and totally reusable, so you will not only be satisfying your current needs but also future ones. A great way to get started on a Parker IPS project is to download our T-slot Aluminum Design Architect software and start designing today.
To learn more: Visit our website.
Article contributed by Julio Sanchez, IPS product manager, Parker Mexico.
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