Studer exhibits precision grinding

At the Schleifring Grinding Symposium, Studer showed the machining of large components using a plate cylinder for the printing industry as an example of precision grinding using Maegerle systems.

When handling large components, the hydrostatic guidance systems of the Maegerle machine range offer high levels of precision.

The task of grinding needs precise machining of the start and end of print line, which is longitudinally arranged on the chrome-plated plate cylinder.

In components of this size and weight (the cylinder measures 500mm in diameter, is 1,600mm long and weighs 1,000kg), special strategies are necessary for machining.

Due to its weight and forces on machining, the workpiece bends and gets out of shape.

Where high levels of accuracy are demanded, there must be precise compensation for these sources of error.

For this purpose, Maegerle has developed a compensation algorithm that measures the deflection of the workpiece in the machine, and together with the processing forces calculates appropriate corrections.

In the grinding process that follows, the machine then travels automatically and precisely in accordance with the values given.

The hydrostatic guidance concept makes it possible to move heavy workpieces almost without friction, which makes a decisive contribution to the quality of the surface finish.

The combination of machine concept with hydrostatic guidance, integral measurement and fully automatic compensation offers the customer an optimum result, even for the heaviest components.

However, modern Maegerle grinding centres don't just solve pure grinding tasks in a reliable manner; they can also handle complex combination machining with geometrically defined cutting edge such as hard turning, hard milling or drilling.

Machining the workpieces in single clamping also has decisive influence on productivity and on quality of the component.

An example of such a combination machine is the Maegerle MGC-L-330.

The grinding centre comprises a fully automatic tool-changing system, a horizontal grinding spindle and a table dressing device.

Machining with geometrically defined cutting edges is carried out with an additional vertical direct drive spindle, which can be swivelled through 90deg.

Due to the rigidity of the large area hydrostatic guides, impressive cutting values can be achieved, according to the company.

CNC machine tools to be auctioned

GoIndustry Michael Fox International will conduct an online auction of approximately 150 lots of late model CNC machine tools and metal fabrication equipment during July/August 2006.

GoIndustry Michael Fox International Inc, one of the world's largest providers of used industrial asset disposition and acquisition services, will conduct an online auction of approximately 150 lots of late model CNC machine tools and metal fabrication equipment.

Online bidding begins on July 19 and ends on August 10, 2006 at 12.00 noon (EST).

The highly sought after metalworking equipment includes a plasma cutter; machining centers; turning center; boring mill, and tool holders.

A full list of items and further details about the online auction are available on-line.

On-line auctions allow buyers to participate in the bidding process from the comfort of their own office or home.

Travel costs are not necessary and time away from the office is saved.

Buyers in every corner of the world can access equipment information and place bids at any time of day, in every time zone, as online sales run 24h/day - a huge benefit of the online auction sale format.

"This auction will be a great opportunity for buyers of metalworking machinery and equipment to benefit from the range of equipment for sale.

The equipment is in great condition, buyers are going to be very pleased with their purchases", commented Paul Shoniker, director of Auction Sales and Services, GoIndustry Michael Fox International.

* About GoIndustry Michael Fox International - GoIndustry Michael Fox International is a global leader in the auction, liquidation, and appraisal of machinery and equipment, inventories, and business assets.

The GoIndustry group of companies includes over 250 staff in 25 offices in 16 countries that provide local service with global reach to clients all across the globe.

CNC machines for sale include Elb grinder

Latest used machine tools offered for sale include an Elb CNC rotary table surface grinder, a 5-axis Dixi jig borer, a horizontal CNC miller and a bevel gear grinder.

Recently acquired CNC and non-CNC machine tools offered for sale by Gribben Davies Machine Tools UK include an Elb CNC Model 10-10 Rotary Table Surface Grinder.

The machine has a tilting table diameter of 1200mm and maximum grinding diameter of 1000mm.

Other details are as follows.

Maximum grinding height - 300mm.

Table load - 3000kg.

Grinding spindle tilting range - +/-90 deg.

Grinding wheel diameter - 400mm maximum.

There are two Swiss-built Dixi CNC machine tools including a Dixi 400N 5-axis CNC Jig Borer with a table size of 1350mm x 1000mm.

Its condition is described as 'superb'.

The other Dixi machine is a CNC horizontal milling machine, Model 350A.

It has double loading pallets with pallet and tool changers.

Also for sale is a Gleason Model 463 Bevel Gear Grinder.

Full details prices and photos on application.