As an essential third-generation feeding apparatus, NC feeders come in a variety of models, sizes, and material thickness compatibilities (2.2mm, 3.2mm, 4.5mm, 6.0mm). These advanced feeders can be divided into two main categories: mechanical NC feeders and pneumatic NC feeders, each offering distinct relaxation mechanisms.
Understanding the Basics: How NC Feeders Work
Regardless of their type, both mechanical and pneumatic NC feeders operate based on the same fundamental feeding principles. Users input action commands (feeding length, speed, and frequency) via touchscreens, which are then transmitted to the Programmable Logic Controller (PLC). The PLC controls servo drives through high-speed pulses, which, in turn, manage the rotation positions and velocities of servo motors. Synchronous belt wheels drive the feeding rollers, ensuring accurate material feeding. The key difference between mechanical and pneumatic NC feeders lies in how they implement relaxation mechanisms.
Pneumatic NC Feeders: Versatility and Wide Applicability
Pneumatic NC feeders connect to press relaxation cam assemblies, or added cam plates for traditional presses without cams, receiving relaxation signals from press relaxation cams. Electromagnetic valves (or proximity switches for conventional presses) control relaxation cylinders that push the upper feeding roller to achieve relaxation. Although slower in operation,pneumatic NC feeders offer compatibility with a diverse range of machines, such as presses, shearing machines, hydraulic presses, forming machines, and laser cutting machines. This versatility makes them an ideal choice for a wide array of applications.
Mechanical NC Feeders: High-Speed Precision and Performance
Mechanical NC feeders require the installation of a relaxation pushrod mechanism on press cams, which synchronously relaxes the upper feeding roller through a pushrod-triggered bearing depression during pressing. Because they necessitate auxiliary devices on press slides, mechanical NC feeders come with certain limitations in terms of press size and model compatibility. However, their faster relaxation movements make them well-suited for short-pitch, high-speed processing environments and traditional press setups.
Thick Plate Stamping: The Pneumatic Advantage
In the world of thick plate stamping, pneumatic NC feeders reign supreme. The pneumatic feeder’s cylinder not only provides relaxation functionality but also clamps materials more tightly than mechanical feeders, preventing slippage when dealing with thicker materials. As a result, pneumatic NC feeders excel in conveying both short and long pitches of heavy, thick plates, and automatically feeding stretched products.
Pneumatic vs. Mechanical: Choosing the Right Feeder for Your Needs
The domestic stamping industry generally favors pneumatic NC feeders due to their broader applicability and simpler installation and calibration processes. Many manufacturers recommend them as standard machines, while offering mechanical NC feeders as optional models. Consequently, many stamping business owners are more familiar with pneumatic models and may be unaware of the advantages mechanical NC feeders offer. They often lack clarity on their performance and compatibility, which can lead to suboptimal choices for specific applications.
However, mechanical feeders can outperform pneumatic ones in numerous short-pitch, high-speed stamping situations and traditional press setups. To ensure that clients make informed decisions, it’s essential to consult with industry experts who can provide tailored recommendations based on each unique scenario.
Weighing Your Options for Optimal Results
Ultimately, the decision between mechanical and pneumatic NC feeders hinges on the specific requirements of your application. Pneumatic NC feeders offer versatility, wider applicability, and superior performance in thick plate stamping, while mechanical NC feeders excel in high-speed, short-pitch processing environments.
By understanding the distinctions between these two types of feeders and consulting with professionals in the field, you can make the best possible choice for your material feeding needs. This will ensure that your operations run smoothly, efficiently, and achieve the desired results in your stamping or manufacturing processes.