If the cutting tools are more intelligent than computers, they can be embedded in the software under different processing conditions. With this information, it is possible to modify the machining parameters of all machining tasks (even conventional machining) by making some adjustments in the user interface of the CAM software to optimize productivity.

Cutting tool suppliers typically hire experienced specialists to access the shop floor and recommend tool and process parameters that increase productivity for specific machining tasks. If such processing needs to be repeated, this technical service can be extremely valuable, but if the processing is only occasionally done, then the service has only marginal value.

The shop can also modify and optimize its own CNC machining program with reference to the relevant tables and rules, but unless it is for highly valued machining tasks, programmers and mechanics often do not have enough time to master and apply this knowledge.

If the cutting tools are more intelligent than computers, they can be embedded in the software under different processing conditions. With this information, it is possible to modify the machining parameters of all machining tasks (even conventional machining) by making some adjustments in the user interface of the CAM software to optimize productivity.

This is the conclusion drawn by the development company of MastercamCAM software, CNC software company and tool manufacturer Isca. A project co-developed by the two companies allows users of Iskar's "ChatterFreeCF" and "AllInOne" series of tools to take full advantage of Iskar's "Efficient Processing (HEM)" rules Set the "dynamic milling" tool path of Mastercam at the final speed. This can be done when the user purchases a tool. After that, users only need to know the efficient machining process and application points in the Mastercam software, and click on the settings.

While this particular collaboration focuses primarily on high-speed machining of the cavity, it may lead to further cooperation between tool suppliers, machine tool builders and control software providers in other areas, which will target the “smart” database of specific processing equipment. Enter the CAM package.

Due to the fear of cutting and damaging the workpiece, the cutting speed usually used by the machining personnel when operating the CNC machine is lower than the speed that the machine can reach. If they use a higher cutting speed, and also because of concerns about damaged tools and workpieces, many operators will reduce the feed rate.

This type of processing is usually not correct. Although excessive cutting forces may damage the tool during high-speed cutting, the main enemy is cutting heat. High-speed cutting - even with a small cutting step, a large amount of cutting heat is generated.

As the cutting speed increases, the tool cuts the workpiece material at a more constant speed, producing thinner chips that reduce the amount of heat absorbed and carried away by the chips. This is counterintuitive, but in practice, in order to create thicker chips that carry more heat away from the blade workpiece interface, it is necessary to increase the feed rate.

This is where high-efficiency machining rules need to be implanted, based on experimental results, adjusting feed rates, cutting speeds, and cutting steps. In the cooperation project between CNC Software and Isca, the "dynamic milling" toolpath of Mastercam was chosen because it is for full depth of cut (the depth of cut is generally 2 to 2.5 times the cutting diameter). Designed for high feed rate milling. This makes it possible to mill a two-dimensional cavity at a high speed with a cutting depth of 12.7 mm and a depth of cut of 25 to 30 mm.

With "efficient machining" and "dynamic milling", the chip thickness is up to 25mm and has a large enough volume to take away the cutting heat. The resulting chips should have a variety of colors - not all brass or dark blue (the colorful colors indicate that the chips are heated during cutting and then completely cooled). All black chips indicate that the cutting temperature is too high and the chips are burnt. In this case, if the user wants to maintain the same cutting speed, the feed rate must be increased to increase the chip thickness when using the processing rules of the implanted CAM software. The operator does not need to adjust the processing parameters according to the intuition. Iskar's “Efficient Machining” rules and tool characterization data enable Mastercam to calculate reasonable cutting steps, feed rates and cutting speeds to protect the tool during aggressive machining.

When the operator loads an Iska tool covered by the project into the Mastercam database, some options appear in the first few pages. For example, a slider allows the user to select an "Efficient Machining" factor and select the desired cavity machining process with a value of 1 to 5. When the user moves the slider, the feed and cutting speed are also constantly changing based on the chip load and surface finish of the CAM database entered into the rules and tables. A drop down menu prompts the user to select a cutting step (5%, 7% or 10%). It is not allowed to choose larger cutting steps because they are considered too aggressive and may damage the tool. The "Efficient Machining" rule controls the "Dynamic Milling" interface and guides the user through the selection of validated cutting parameters.

"Dynamic Milling" with the "Efficient Machining" rule is a high-speed roughing method mainly used for cutting steel. It cannot be used to process heat-resistant superalloys (such as Inconel or titanium alloys) because of the "efficient machining" of these workpiece materials. "The rules have not yet been worked out, and the processing of superalloys is very different from tool steel.

The current version is best suited for a large number of machining shops (such as mold makers) that process two-dimensional cavities. For example, a mold shop in Indiana, USA, cuts the A and B plates of a standard formwork purchased according to the catalog. Initially, it takes 65 minutes to complete the process. Later, the workshop switched to Isca's FeedMill milling cutter (not using the "high-efficiency machining" process), and the processing cycle time was shortened to 45 minutes. Now, the "efficient machining" process and "anti-shake (CF) are adopted. “End mills and “dynamic milling” toolpaths can be processed in just 15 minutes. The “efficient machining” process also eliminates the bottleneck of intensive use of a CNC machine. The shop expects tool life to be further improved because the “Efficient Machining” process uses the entire cutting edge length of the tool – not just the tip of the solid carbide end mill – for cutting.

It is important to evaluate your own machine before using the “Efficient Machining” process. For example, if the operator selects a certain “efficient machining” factor and wants to use a spindle speed of 12,000 r/min, the program indicates that the machine tool It must be machined at a cutting speed of 12.7 m/min (500 ipm) to produce the appropriate chip load, which may or may not be possible for certain machine tools and workpieces. If the cutting speed is too high (or because the machine speed is limited), the cutting speed can only reach 4.5m/min (180ipm), which will cause the chips to be too thin and the tool to burn. In situations like this, it is necessary to reduce the "efficient machining" factor.

The use of intelligent tools does not guarantee absolute safety. However, even under the highest parameter setting conditions, the “Efficient Machining” process can safely achieve roughing production capacity. The MastercamX5 version has included the Iskar Intelligent Tool Database in the "Dynamic Milling" module, which was launched in 2010.

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