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WIN woodworking INTERNATIONAL 2022/4

  • Text
  • Archroma
  • Ligna
  • Weinmann
  • Xylexpo
  • Leuco
  • Felder
  • Scm
  • Tools
  • Furniture
  • Siempelkamp
  • Homag
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  • Vecoplan
  • Harnischcom
  • Woodworking
  • Finishing
  • Processing
  • Machining
  • Vollmer
WiN – woodworking INTERNATIONAL is the international magazine for the woodworking industry. We report on all aspects of woodworking from board materials, wood treatment to machines, tools and technical know-how, from timber engineering supplies to the latest developments in technologies and markets. We address factory managers and production engineers directly, and thus ensure coverage of the decision makers within the industry. Circulation is worldwide with special emphasis on the most important growing markets. An increasing share are subscriptions and requested copies. Our online-section will further be expanded according to reader requests. WIN – woodworking INTERNATIONAL is published in English.

TOOLS challenges. With

TOOLS challenges. With diameters starting at 10 millimeters and, depending on the version, suitable for feed rates of up to 35 m/min, it is perfect for delicate and, above all, fast nesting – ideal for machining plywood, compact laminate, chipboard or MDF. When mitre sawing on CNC systems, it is important to ensure that the circular sawblades used are really suitable for such applications and which machining strategy is used. (Photo: Leitz) Another important point is the use of the right machining strategy. In this case, it is recommended to score the panel two millimeters deep on the inside edge with feed in a first cutting movement. Subsequently, the cut-off is performed in the counter-rotation. In this way, CNC users achieve the perfect cut. Free of tearout on both edges and in the cut area without defects. In the so-called nesting process, nested shapes are cut from panel-shaped materials with the help of shank tools. Especially with delicate parts and high feed rates, CNC users are regularly faced with the challenge that the milled parts are displaced and damaged by the high-speed cutter during cutting. The vacuum of the machining table is not sufficient to balance the resulting forces and prevent the manufactured parts from slipping. The use of small tool diameters can help here. On the one hand, this reduces the cutting forces, but much more important are the smaller cutting grooves that are created. If, for example, the cutter diameter is reduced from 16 to 12 millimeters, this corresponds to a 44 percent reduction in the cutting volume. So the less material is removed during nesting and the smaller the resulting cutting grooves are, the less this weakens the vacuum performance on the machining table and the workpieces are held firmly in place. With its nesting cutters, Leitz offers an extensive and powerful range of tools for such Depending on the machine equipment and machining process, a wide variety of tooling solutions and machining strategies are used in furniture production or interior design. The variety of materials and the demands on materials and end products are constantly growing, but the machining processes themselves will hardly change in the coming years. For this reason, universally applicable tools with maximum performance are becoming increasingly important in the industry. After all, „time is money“ and „quality pays off“ will continue to apply in the future. More efficiency, more flexibility and more productivity in manufacturing therefore not only helps to save money or to increase output quantities, but also in the field of tool maintenance these slogans will increasingly be aspects to be considered in the future. Craftsmanoriented furniture manufacturers and interior designers will take this into account in their future business plans. It‘s good to have a tooling partner at your side who can provide suitable tooling solutions, demand-oriented services and a great deal of knowledge about processes, machines and materials. For more efficiency, productivity, flexibility and quality in the trade. www.leitz.org Examples of such circular sawblades, especially for mitre cuts, are the Katana carbidetipped circular sawblade and the WhisperCut diamond-tipped circular sawblade from Leitz. Both Katana and WhisperCut enable perfect cutting results in all common materials thanks to their small cutting width and particularly smooth running characteristics. The Nesting process When nesting, it is recommended to use cutters with small diameters. This reduces the cutting volume and the vacuum output at the machining table remains constantly high. The workpieces are thus further held firmly on the table. (Photo: Leitz) 20 No. 4 • November 2022

TOOLS Edge finishing in practice One cutter for two directions of rotation The kitchen furniture manufacturer Schüller Möbelwerk KG uses only one edge milling cutter for the edge trimming of plastic as well as veneer edges: A special multi-profile lip trimmer from LEUCO. The special feature: It can operate both with the feed and against the feed. With around 2,000 employees, Schüller Möbelwerk KG produces around 150,000 customized kitchens a year that are sold worldwide. Change of direction easily automated To ensure that the edges on furniture fronts look smooth and are of high quality, edge trimming is carried out on appropriate machines. The challenge here is that the machining of plastic edges is carried out against the feed. In the case of solid wood and veneer edges, however, processing ideally takes place with the feed. The reason: Unlike plastic, wood fibers tear easily when the lip trimmer works against the direction of the fibers. To prevent this, the machine mills with the feed for wood. In the past, the machine stopped at Schüller and the mo- tor was replaced. Many furniture manufacturers even produce the different types of fronts on several edge banding machines to solve the problem. Alternatively, one machine is equipped with several units for the same application. Schüller asked LEUCO and IMA Schelling if they could develop a tool that would solve this problem. The multi-profile lip trimmer from LEUCO is a special version. This is designed for operation with the feed as well as against the feed. Development of the single multi-profile lip trimmer Schematic view of the machining of veneer edges – upper corner with the feed. Schematic view of the machining of plastic edges – upper corner against the feed. LEUCO developed a suitable tool for milling in both directions in the future. IMA Schelling modified the equipment to meet the requirements. New programming now shows the edge banding machine when a change in the direction of rotation is about to occur. With the fully automated change in the direction of rotation, Schüller saves about 20 minutes with this solution. Depending on the furniture front, the machine control stops the machining and the motor. The change in the direction of rotation is initiated and the tool moves into position. This process takes about 20 seconds. For many users, this solution eliminates the need for additional equipment or a second machine. Depending on how they used to deal with this issue previously. www.leuco.com No. 4 • November 2022 21

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