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Frai Elektromaschinenbau Gesellschaft m.b.H
Bundesstraße 37
4817 St. Konrad

Tel: +43 7615 - 8390
Fax: +43 7615 - 8390 - 40
Mail: office(at)frai.at

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By automatically changing the clamping jaws, tailstock centers and prism tools, the machines and the automation can be operated without setup.

This turnkey system has a wide variety of special features and is based on a solution that has already been implemented. Multiple linkages can be implemented in a wide variety of designs. In the following, the central automation for the linking of four M65 MILLTURN complete machining centers is examined. Thanks to the automatic change of clamping jaws, tailstock centers and prism tools in connection with a servo-motorized gripper to cover an extremely wide range of products, the machines and the automation can be operated without setup.

The system features a fully automatic gripper quick-change system and gripper warehouse. Servo grippers for workpieces up to max. 250 kg are used. Grippers for prismatic tools, tailstock tips as well as inner and outer jaws are also used. The 6-axis robot with 480 kg payload is mounted on a 7th axis. A range of grippers can be added to and removed from the  production process fully automatically. An integrated drip tray collects coolant and chips.

Set-up stations and workpiece measurement
By using two set-up stations for workpieces and tools, tools can be set up and new workpieces can be loaded and unloaded parallel to machining time. The two diameters at which the grippers hold the workpiece are determined via the two servo parallel grippers with an absolute position measuring system. These two values are compared with the nominal diameters stored  in the recipe. Two stationary laser light barriers determine the length of the workpieces and compare them with the recipe‘s nominal values. The workpieces‘ offset value from the robot zero point is also calculated.

Automatic tool change incl. cleaning and lubrication
A special chuck allows for fully automatic jaw change over (simultaneous replacement of the 3-part sets). The tailstock  tips can be changed automatically using a special gripper. Another special gripper is able to automatically change the long prismatic tools (up to 2,500 mm long and 250 kg in weight).
Before the new tool is inserted into the machine, the robot moves with the exposed guide to a special station in which the guide is blown off to clean it and then coated with oil. This creates the optimum conditions for a reliable handover process.

Advantages of multiple machine cell

Use of flexible servo gripper for the workpieces, 5-position gripper station

The host computer compiles an optimised production program

Lower unit, machine and tool costs thanks to unmanned shifts or unmanned production

Flexibility through the universal gripper, Spannbackenlager, special tools and different tailstock tips

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