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Here’s where the right tool provider becomes more of a partner; besides tooling recommendations, they can be an invaluable resource to help get new component production up and running. It’s important to work with a provider that has engineering and support services, not only to guide in tool selection, but also to help with tool path programming, simulations and actual machining in a test facility using the same type of equipment as your shop.

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Composite materials play an important role in aerospace manufacturing. The light weight, durability, and ability to create complex shapes from molds make these materials ideal for frames and structural components that enable lighter, more fuel-efficient aircraft.

A typical machine operator listens during the cutting process and tends to reduce the cutting speed and feed rate when something doesn’t sound right. This is also a common practice to try and conserve tool life. But this careful approach to machining will often lead to problems in composite materials. The sounds of composite machining are much harder to read and going too low on the feed and chip load (the width of chips produced by a cutting edge on each rotation) will lead to rubbing, chatter and delamination.

While composite structures can weigh up to 20 percent less than their metal counterparts, these materials can often be more difficult to machine. The extremely abrasive nature of carbon fiber reinforced polymers (CFRPs) will wear down standard cutting tools more quickly than almost any other material. A standard carbide cutting tool may only hold up to cutting a few feet of CFRPs before its dimensional stability fails, while in traditional metal machining that same tool might last 20 to 50 times that before wearing out.

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Great in Heavy Radial Efficiency Milling (HREM) applications of Titanium 6Al4V and other titanium alloys, these fully stocked, square profile Variable Helix End Mills decrease chatter and harmonics.

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Diamond tools may have a diamond coating on the surface, applied using a chemical vapor deposition (CVD) process, or they can even be made with diamond veins that are sintered into the carbide. Veined tools represent a significant advancement in composite machining because they allow for cutting geometries specific to CFRP materials that are normally not possible.

Buying the tool is just the beginning. We have partnered with industry-leading CAM software packages to provide users with up-to-date, accurate tool libraries.

Contending with these variables can make it tricky to find the best tool and process for the job. However, there are a few general tooling strategies and cutting principles that shops can apply when machining composites to improve the efficiency and quality of their production.

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Harvey Tool is committed to designing unique geometries that optimize cutting performance for a variety of materials and applications. We introduce hundreds of new tools to the market every 6 months, offering our customers the solutions they need most.

Often regarded as one of machining’s most versatile tools, Double Angle Shank Cutters can perform chamfering, V-groove, thread milling, deburring, and countersinking operations.

With so much variation in composite materials, getting the right machine setup with the right processes and the right cutting tools may seem overwhelming. Testing on a new component or material can be extremely difficult, especially if you cannot afford to take a machine out of production.

With specialized geometries to enhance tool results, Harvey Tool solid carbide, high performance miniature end mills extend tool life, improve finish, and decrease cycle times.

Using PCD tools that can withstand the abrasive nature of composites offers clear advantages in terms of machine uptime, surface quality and process security. They maintain their sharpness longer and provide a cleaner cut in composite materials, reducing the risk of fraying or failure that can lead to scrapped components.

We offer a comprehensive selection of more than 28,000 miniature and specialty cutting tools that are all fully stocked. The breadth and depth of our products help solve the industry’s toughest machining challenges.

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Composites come with a wide variety of physical and chemical properties. They can have a wide range of constituent materials that are incorporated through matrices or layered reinforcements. Understanding your material and how it behaves during the machining process is essential for achieving an optimal machine setup.

Finished surface roughness (h) · Feed per revolution. Feed rate (when turning) is the amount of movement of the insert per revolution of the work. · Cutting speed ...

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Aggressive cutting with large chips also helps minimize heat buildup in the material by transferring the heat through the chip and to the tool. This is especially important when working with thermosets and thermoforms, so the material doesn’t adhere to the tool. In many applications, managing heat with coolants is not typically an option because of the amount of dust produced by composites. The dust mixes with the coolant and creates an abrasive paste. Coolant can also get in between the composite layers and ruin the integrity of the material. To keep heat down, shops can use a cold air gun in the cutting zone with an adequately sized dust collection system as a low-cost solution.

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Great in Heavy Radial Efficiency Milling (HREM) applications of Titanium 6Al4V and other titanium alloys, these fully stocked, square profile Variable Helix End Mills decrease chatter and harmonics.

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When cutting into composites, it’s critical to stay aggressive, maintaining cutting parameters of 6,000 to 10,000 rpm and high chip loads in the range of 0.002"-0.003" per tooth/min. If you run tools under a 0.001” chip load, you’ll destroy your tools very quickly. Using PCD tools here will allow operations to maintain the aggressive cuts needed.

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A good tool provider will run extensive tests on PCD tools using composite materials to provide clear data on performance and life expectancy to help drive more predictable results. They’ll also be able to extend the life of the tool through reconditioning, which is an area that has seen improvement in recent years. Where previously you could resharpen a PCD tool two or three times, you can now resharpen some tools up to 10 times. The cost of resharpening is typically 20 percent the cost of a new tool, so this dramatically increases the return on investment.

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To avoid delamination, it’s essential to use tool geometries that minimize lifting of the material. For example, choosing a milling tool for material removal with a low helix angle — maybe 10 degrees or 15 degrees at most — will keep milling operations from pulling the material apart. Additionally, choosing tools that maintain a sharp edge longer, like drills with PCD tips, will minimize risk of delamination. Once a tool begins to dull, it will immediately begin pushing the material, rather than making a smooth cut, and cause splintering.

Composite machining often involves tolerances that are just as tight as metal machining and with just as many cutting variations. Using the right tools, the right setup and the right techniques will help ensure success with more reliable aerospace production.

Adding to the challenge, the makeup of these materials can be very diverse, with a wide variety of characteristics. Some composites will be stacked with different materials, like metals, or with fibers aligned in different directions; others will be meshed in a unidirectional material. Some composites are prone to fraying or delaminating, while others, like polyaryletherketone (PEAK) materials, are heat-sensitive and can adhere to cutting tools.

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Recommended Cutting speed range for turning at stable conditions is 490 - 660 [SFM] / 150 - 200 [m/min]. Recommended Cutting speed range for milling with stable ...

Keeping tools sharp is critical here. Don’t push the limits on the life expectancy of your cutting tools; change them out when they begin to lose their edge. Managing tool wear by utilizing different cutting edges of the tool will also help maintain that tool sharpness longer. Positioning a tool to cut further up on the flutes in a side milling operation, for example, will help disperse tool wear more evenly and extend the life of the tool — minimizing risk of pushing and delaminating the material.

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Composites are often made up of multiple layers of carbon fiber and other materials that are prone to separation during ineffective machining processes. This separation of layers, also known as delamination, can have detrimental consequences on the structural integrity and surface quality of the component.

Often regarded as one of machining’s most versatile tools, Double Angle Shank Cutters can perform chamfering, V-groove, thread milling, deburring, and countersinking operations.

Adding to the challenge, composites are often stacked with other materials, like titanium, aluminum or copper, in all sorts of combinations to enhance the materials’ properties or structural support. When drilling through these multiple materials, shops need to understand how each material will interact with the tool. With stacked carbon fiber and aluminum, operators can maintain the same aggressive cutting speed for the duration of the cut, but if the composite is stacked with harder materials like titanium, they may need to adjust the cutting speed and feed rate accordingly for each layer.

Harvey Tool’s vast offering of Miniature Keyseat Cutters are fully stocked in a multitude of cutter diameters, neck diameters, cutter widths, and radial depths of cut.

New to Harvey Tool, Machining Advisor Pro (MAP) is a cutting edge resource for generating customized running parameters for Harvey Tool end mills.

Rigid and secure tool holding is essential, otherwise your investment in good tooling will be wasted with chatter in the cut. Hydraulic chucks will minimize run-out and the chance of tool pullout, either of which makes for a bad day when plowing through a $40,000 airfoil. And at higher spindle speeds (anything above 20,000 RPM) it’s best to have the tool holders balanced as a complete assembly, with the cutting tool and retention knob installed.

For example, a unidirectional material composed of a single layer can create unique challenges in machining operations. Shops will need to approach the cut from the proper angle and direction, and in some cases will need to use a compression style tool that approaches the cut from both the top and bottom of the material.

Easily find the perfect tool for your job by searching Harvey Tool's vast product offering by tool style, machining operation, or part material.

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Composites are notorious for wearing down tools. And when you’re machining large structural components like a fuselage component or wing box, or drilling thousands of holes for rivets, frequent tool changeouts can become a serious drag on productivity. In these applications, investing in polycrystalline diamond (PCD) tools are well worth the cost, because they’ll last 10 to 15 times longer than a standard tool.

Our fully stocked inventory is ready to ship the day of its purchase. We offer second day delivery at ground pricing, and any overnight orders ship until 7 p.m., EST.

With specialized geometries to enhance tool results, Harvey Tool solid carbide, high performance miniature end mills extend tool life, improve finish, and decrease cycle times.

Gripping the composite workpiece is also important. Vacuum fixtures are useful if the workpiece has enough surface area to create sufficient gripping force. In most cases, special jigs are the best option, especially for the complex, three-dimensional shapes common with composite workpieces. Jigs should be designed to avoid any unsupported cutting areas while still gripping securely enough to prevent movement and vibration in the part.

We offer more than 30,000 miniature and specialty cutting tools that are fully stocked and ready to ship on the day of your purchase.