The Myths of CNC Machining

CNC machining is an incredibly valuable production process. It ensures parts look and work exactly the same every time. This is especially important in heavily regulated industries like aerospace, where engineers must meet stringent standards.

However, many people have misconceptions about CNC machining. Here are a few of them:

Myth 1: It’s too expensive

One of the biggest myths around CNC machining is that it’s prohibitively expensive. In fact, when compared to other forms of manufacturing, it is one of the most cost-effective options. This is due to a number of factors, including the low cost of automation and economies of scale, which dramatically reduce operational costs for large production runs. Additionally, using digital technology helps engineers to reduce design iterations and bring products to market at a faster rate, which also contributes to the lower cost of CNC machining.

However, despite the many advantages of CNC machines, it’s important to remember that they still require skilled workers to operate them. For example, CNC machine operators must load castings, monitor cycle times, measure results and evaluate quality. They must also be able to perform troubleshooting when the machine malfunctions, which requires additional skill. Furthermore, CNC machines must be regularly maintained and cleaned to keep them running at optimal performance.

Another important factor that impacts the cost of CNC machining is material costs. For instance, specialty metals can be quite expensive, which can increase the total cost of a project. In addition, CNC machining produces a significant amount of scrap material, which must be factored into the budget when selecting materials for use in the process.

For these reasons, it’s essential that engineering teams carefully evaluate their budget and understand the cost of CNC machining before making any decisions regarding which manufacturing process to use. By dispelling myths about CNC machining, engineers and product managers can make informed decisions and optimize their production processes.

Myth 2: It’s too difficult

For those outside the world of machining, the CNC process can seem intimidating. But for engineers, product teams, and machinists, it’s simply a new way to cut parts that improves efficiency and accuracy, as well as consistency. It’s not any more difficult than other forms of machining, and it’s actually a lot safer and more convenient.

The most common CNC machines include lathes and mills. These machine tools use computer software to dictate the movements of factory equipment, resulting in high-precision cutting jobs that can’t be achieved manually. They can even do three-dimensional tasks. Engineers begin the CNC machining process with a 2D vector or 3D solid part CAD design, created either in-house or by a CAD/CAM service company. These CAD files are used to create a digital model of the part or product, along with the technical specifications required for producing it.

Once the CAD file has been programmed, the CNC machine automatically begins cutting the part from a raw material, such as metal or plastic. Engineers can choose from a wide variety of materials for their products, which gives them incredible flexibility in their manufacturing process. If a product must be corrosion-resistant, for example, it’s important to select a high-quality, durable metal like stainless steel. Conversely, if a product needs to be light, there are plenty of low-density metal options available.

CNC machining is also much faster than manual machining, allowing manufacturers to produce parts in a fraction of the time. This is especially true if a machine is equipped with advanced features, such as 5-axis machining, which can shape complex pieces with incredible precision and accuracy. Think of it like an iPhone: consumers are willing to pay a premium for the latest and greatest features, because they know that these upgrades will help them get more out of their device. The same holds true for CNC machining, which is why precision machine shops that don’t invest in the latest technology may fall behind the competition.

Myth 3: It’s too dangerous

A lot of people may be under the impression that CNC machining is dangerous, especially when it’s compared to manual machines. However, this couldn’t be further from the truth. In fact, many of the hazards that occur in machine shops are not related to CNC machining at all. They’re more likely to occur due to improper safety standards or outdated operating equipment.

With that said, it is important for any machinist to take the time to learn how the machine works before they start using it. This will give them a better understanding of how the machine operates and what it’s doing at all times, which can help them stay safe when working with the equipment. Additionally, it’s important to follow all safety guidelines when working in a machine shop, as these are there for a reason.

Another danger that occurs in a machine shop is noise-related damage to a person’s hearing. It is important to keep in mind that a CNC machine creates a large amount of noise, which is why it’s important for all machinists to wear ear protection. This will prevent any damage that could be caused by prolonged exposure to the noise.

It’s also important to understand that CNC machines don’t require the same physical interaction as traditional machinery. Instead of a worker physically handling the machines, they’re sitting in front of them and controlling them from afar with a computer. As a result, this helps to reduce the risk of any physical injuries, which is a big benefit of CNC machining over other forms of machining.

In addition, there are some other things to be aware of when working with CNC machines, such as the need to use proper cleaning products and lubricants. This is necessary to keep the machine functioning properly and to avoid any issues like corrosion. Finally, it’s vital that all workers wear proper eye protection when working with CNC machines to avoid any vision-related issues.

Despite these common misconceptions about CNC machining, it is still a very effective manufacturing process. It can produce high-quality parts at a very affordable price and in a shorter amount of time than other methods.

Myth 4: It’s too slow

CNC Machining is often viewed as a highly technical, specialized field, and that can be intimidating for those who are interested in learning more about it. Unfortunately, this misconception can also prevent some people from even giving CNC machining a try at all. However, the truth is that CNC machining isn’t as hard or complicated as it seems. In fact, it’s a very versatile, efficient and accurate manufacturing process that complements additive manufacturing perfectly.

The speed of CNC machining is actually one of its biggest strengths. This is because the machine itself is constantly working, which means it can produce parts much faster than manual machines can. As a result, it can be an ideal choice for companies that need to get their products to market quickly and efficiently.

Despite its speed, however, it’s important to keep in mind that CNC machining is not completely automated. It still requires someone to operate and monitor the machine, as well as load and measure workpieces. Moreover, it’s crucial that the correct materials are used to avoid any issues with the cutting and finishing processes.

For instance, it’s essential to choose a material that can withstand the high temperatures involved in a CNC machining project. There are many different materials that can be used for this purpose, but some of the most popular include aluminium and titanium alloys. In addition, it’s crucial to use a lubricant that can help with the cutting and cooling process.

Finally, it’s also vital to use a tool that’s capable of producing the desired finish. While there are a lot of different options for this, it’s best to stick with one that’s proven to be effective in previous CNC projects.

There’s no doubt that CNC machining is one of the most powerful and versatile manufacturing technologies available. But it’s also important to dispel myths that can stop people from trying it out.

Choosing the right CNC machine is important for your business. A good place to start is by searching for a company that sells the equipment you need and offers excellent customer service. A quality company will have years of experience and a reputation for excellence. If you’re interested in buying a used CNC Machine, contact us at S&M Machinery, the leading independent machinery dealer of late-model surplus used CNC Industrial machine tools in the United States. Look through our extensive inventory of used CNC Machines and contact us today, we’ll help you find the right machine that’s perfect for your business.