What Are the Advantages of Precision CNC Machining Services？

In the modern world, CNC machining services play a vital role. These machines have bought a revolution in many industries. They have changed the manufacturing process very efficiently. As the world is moving towards more and more automation, this industry is well adopting the trends. CNC machines use high-speed cutting tools to remove excess material from a workpiece and give it the desired shape and size. With custom CNC machining, we can achieve all this at much higher precision!

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In this article, you will learn everything about precision CNC machining services along with their advantages.

Table of Content

■ What are Precision CNC Machining Services?

■ Advantages Of Precision CNC machining

■ Process for precision CNC machining:

■ Tools used for precision CNC machining

■ Conclusion

What are Precision CNC Machining Services?

Precision CNC machining is a subtractive manufacturing process that produces precise and highly accurate machined parts. To put it simply, it is the process of manufacturing the desired product which requires strict tolerances.

This type of CNC machine mainly focuses on the manufacturing of surgical instruments, aerospace, and automobile components. With CNC machining, the machinists can set the tolerances for the machine as low as the project demands. It helps to achieve a higher degree of accuracy, repeatedly at a low cost.

Surface Finish for CNC machined parts

After the production, surface finishes are also very crucial for the part to last longer. The most used finishing techniques that come under CNC machining services are:

• Anodizing: It is an electrochemical method of improving the surface of the machined parts. We use alloys of different metals, usually aluminum and titanium to create a protective coat over the surface

• Powder coating: If a colored surface is required for the part, then powder coating is the go-to. It is best suited for parts with outdoor applications.
• Chemical or mechanical treatment: Chemical and mechanical finishes help to achieve a smoother and more precise surface finish. We treat the surface with either chemical or grind the surface for a mechanical finish
• Nickel plating: The process involves a thin coating of nickel on the CNC machined parts through an electrolytic process. The goal is to achieve a decorative look and increase corrosion resistance
• Electroless nickel plating: This type of plating also has the same properties as the one mentioned above. However, the difference lies in the process of plating as it is electroless and does not require any electric current.

A good surface finish enhances the electrical and corrosion resistance of the part. It ultimately results in the production of high-performing machine parts.

Worthy Hardware is one of the leading CNC machine shops based in China. We provide all kinds of precision machining services. With more than 10+ years of experience in the industry, we have delivered thousands of projects worldwide. Our highly skilled and experienced team leaves no stone unturned when it comes to delivering the best quality for our clients. Get in touch with us for more information or a customized quote!

Advantages Of Precision CNC machining

CNC machines play a vital role in the production of custom machined parts. The benefits of using a computer numerical control machine have led to various advancements that we see today in the Modern world. Here are the top advantages of precision CNC machining services.

Fast manufacturing

CNC machining is known for time-saving and quality production. A big plus point is that the machines can work 24\7 without any interruption and produce the desired quality products.

We can also control the speed of the spin of both the cutting tool and workpiece and make it faster to match the demands. These qualities allow making the manufacturing fast, accurate, and efficient.

Little to no waste:

The main principle of work in CNC machines is to machine without creating much waste. A CNC machine process the raw material as instructed by the coded programs of the computer. These programs are also useable for the upcoming batches. This way industries can make smart use of the available material and cut down on the potential waste.

Enhance personal safety:

One of the setbacks of manual machining was the risk of human safety because it involved physical interaction with the machine to produce a part.

With CNC machines, human interaction is limited to the role of supervising the performance, running the software, and quality checks. Due to this automation factor, the workplace has become safer, and more productive.

Lower production cost:

Modern CNC machining is all about automation. One of the best advantages of CNC machining is the precision milling and turning of the workpiece leading to lower production costs. It also helps in lowering the labor cost as industries only have to hire a few skilled laborers to regulate the functions of the machines.

No human error:

All CNC machining work runs on computer software. The manufacture of the prototype models before the production allows the machinists to eradicate any potential error in the machined parts. CNC machining services have enabled businesses to precisely measure and control all the movements of the cutting tool which leaves no room for any human error!

Increased accuracy and precision:

A high-quality CNC machine is capable of performing more than one operation in a single setup. They can automatically change the cutting tool as instructed. 5 axis CNC machines can approach the workpiece at 5 different angles. This modern CNC machining technology allows us to achieve higher accuracy and precision in every detail of the custom machined part.

Process for precision CNC machining:

The machining processes are different for different CNC machines. However, the basic machining remains the same. In this process, the machine removes extra material from the stock with utmost precision and accuracy. The difference lies only in the orientation or process of machining.

CNC machining:

It is the most basic type of machining with a moving router and a fixed workpiece. The high speed of the cutting tools on the contoured surface of the stock enables us to manufacture custom CNC machined parts. The workpiece rotates around the tool at a high speed to remove the excess material.

The movement of the cutting tool is controlled by computer-aided programs like CAD (Computer-aided designs) and CAM (computer-aided manufacture). With the help of these designs, the machinists can create 3d prints that help to achieve the best products. But, for precision machining, the models, and designs must contain minute details. It helps the machine to cut through the material more precisely. They can work on a wide range of CNC machining materials like Aluminum, Brass, Metals, Plastics, Stainless Steel, and much more to manufacture a wide range of high-quality CNC parts in minimum lead time.

Multiple axis CNC milling:

3 axis 4 and 5 axis CNC milling machines are the most common types of multiple-axis machines. A milling machine uses rotatory cutting tools while the workpiece is held in static. Rapid prototyping before moving towards mass production ensures the product is error-free. The main benefit of the multi-axis CNC machines is that they can machine more custom CNC parts in less time with the same quality standard. The process of multi-axis milling machines proceeds with single-point cutting which can approach the stock material in 3, 4, and 5 axis. The rest of the process is the same as described above.

Another modern-day precision CNC machine is called the machining center. It can machine a workpiece with more than one tool, on multiple axes in a single setup. It helps bring down the lead time even more than 5 axis milling machine. CNC milling machines are used for the high-volume production of more complex precision machined parts and intricate designs.

CNC turning:

CNC turning machine performs the same functions as a milling machine. But, the key difference is the orientation of the tool and table. Turning machines use a single-point fixed cutting tool and a moving workpiece table. It can efficiently machine on both the internal and external surfaces of the material which is also known as boring. CNC turning machines mainly manufacture cylindrical parts.

The process of CNC turning comprises a few steps. It begins with the cam and cad file of the program. These programs are converted into G-codes. The next step is to choose the suitable tool for the part to be manufactured. If the custom CNC machined part requires more than one tool, the turrent can hold these extra tools. The last step is to set the cutting tool and work table for the process to begin.

Swiss CNC machining:

A swiss type CNC machine is one of the most modern high precision CNC machines. From rapid prototyping to custom precision parts and intricate designs, swiss machines are the best choice. It can deliver very tight tolerances on demand. The process of machining for this Swiss machine is different than other machines.

• The stock of raw material is inserted into the tooling area of the machine.
• The material outside the tooling part is held firmly on a fixed support
• For a Swiss-type lathe, the material can move and rotate along the axis
• Swiss turning machines perform exceptionally well on unturned surfaces. They can perform more than one function simultaneously.

The main applications of a swiss machine are in the military and defense industry, manufacture of medical devices and equipment, minute parts for both automobiles and aerospace.

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There are more than 8 types of CNC machines. Each machine performs different operations. The difference in these machines is in the orientation of the cutting tool, spin, fixed tools, moving tools, rotation, and the movement of the rotatory table.

Some of the most used cutting tools for CNC machining services are:

Fly cutters:

Fly cutters are the go-to tool for industries for more than one reason. It not only serves as a cutting tool but also to achieve a nice and smooth surface finish

Plain mills:

Plain mills are also known as slab cutters. It is the best tool for creating both wide and narrow cuts in a short time. Typically, plain mills have four sharp edges pointed outward.

Face mills:

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As the name suggests, face mill cutters create a flat face on the material. The primary use of the tool is in the machine used for the CNC milling process. It is used to make grooves or slots on the surface of the material. To achieve a more complex design in reduced lead time, use aside and face cutter which serves an additional purpose of cutting the sidewalls of the piece.

End mills:

It is a cutting tool with sharp flutes towards the end. In a regular end mill, there are up to 8 flutes. If you want to cut down a metal without predrilling, then end mills are your go-to tool. It can easily remove large amounts of material in a single rotation

Hollow mills:

Hollow mills are usually used during the CNC milling process for cylindrical workpieces. The tool is itself cylindrical (pipe-shaped) with three or more sharp edges on one end. It also helps in finishing projections on the surface.

Conclusion

To conclude, high CNC machining focuses more on the precision of the machined parts, along with other factors. There is high accuracy in every detail of the CNC parts manufactured with this machine. Manual machining resulted in low-volume manufacturing. Now it has been very efficiently replaced by CNC machining

Are you looking for a reliable CNC machine shop for precision machined parts? Look no further. Worthy Hardware is the go-to machine shop for all your CNC machining requirements on all types of metal materials and more. We own ISO - certificate for its state-of-the-art quality management system and is also equipped with modern 3d printing, injection molding, sheet metal, and wire EDM technology. Our machine shop can deliver custom quality products with lead times as short as one day. For a custom CNC machining quote, fill out this form, and our customer representative will get in touch with you!

Worthy Hardware is a CNC manufacturing and sheet metal fabrication company,including CNC machining services,CNC milling services, CNC turning services, laser cutting services and stamping services.Call us +86- or us [ protected] for more discounts for your projects.

What Is Precision CNC Machining?

Precision CNC machining is manufacturing components by cutting out and shaping raw materials. Computer-aided Manufacturing (CAM) blueprints and Computer-aided Design (CAD) aid in selecting the correct cutting procedure. These programs are essential during the design phase since they frequently feature comprehensive 3D outlines that guarantee successful part fabrication.

High-precision machining is becoming an essential component of the industrial industry. It necessitates the participation of skilled designers and expert engineers. Designers are in charge of designing and interpreting designs into manufacturing instructions. The machinist then sends the final coded instruction to the CNC equipment in machine language, allowing the manufacturing process to begin.

Steps in the Precision CNC Machining Process

The precision CNC machining processes companies employ are pretty similar, and they are:

Create the Graphical Model

A graphical model is necessary to construct any part. This is performed with the use of Computer-Aided Design (CAD) software. The CAD program allows the designer to build 2D and 3D models of any part for manufacture.

Hand-drawn sketches are commonly used to comprehend the core concepts of a part. The CAD designer then resorts to these sketches to produce the graphical model with precise measurements. There are numerous popular software programs for Computer-Aided Design, both free and paid. Manufacturers might also outsource the design process for any complex design development.

Convert CAD to CAM

Computer-aided design generates a computerized graphical representation of the part. This representation is simple to understand for designers, operators, and manufacturers. However, the CNC machines that make the part do not directly grasp this digital format.

The machine understands coordinates and can move the cutting tool or shift the workpiece based on them. As a result, CNC machines demand that the part design be in a format that includes the essential manufacturing instructions. The readable format for precision CNC machining is created using (CAM) software. The CAM software translates theCAD file format into a format that CNC machines can recognize.

Computer Aided Manufacturing (CAM) software employs two kinds of codes: G and M codes. The G code regulates the cutting tool’s coordinates. The M code manages the machine’s auxiliary functions, such as turning on or off the coolant flow.

Setup the Machine

Once the designs in CAM format are complete, it is time to set up the machine. This will usually necessitate machine tool calibration and mounting the workpiece on the machine. The machine tools used differ depending on the workpiece material and final item design. Precision CNC machining tools are available for a variety of reasons. It is critical to tighten all clamps appropriately and confirm that the machine characteristics, such as coolant levels, are acceptable during this process.

Run the Machine

When the setup is finished, the machine program is ready to run. Most CNC machines include a display for monitoring the program and adjusting various settings. When the program is run, the CNC machine will commence precision CNC machining.

Finishing

The precise machine can remove the part once it has been created. Depending on the needs, the part may be sent for secondary procedures such as grinding or polishing. However, a precision CNC-machined completed product requires no extra processing in most circumstances.

Tolerances in CNC Precision Machining

Although precise CNC machining tools are extremely accurate, they cannot recreate product dimensions exactly as they appear in the CAD blueprint. Machinists use tolerances.

Precision CNC tolerance is not standardized. Tolerance levels vary depending on the production method. The number of decimal places in a tolerance value demonstrates the measurement’s rigor. Here are the various types of tolerance measurement systems:

Limit Tolerances

This occurs when the tolerance value is placed inside a range. For example, if the tolerance of the shaft is 15.5mm and the nominal value is 15mm, this is a limit tolerance.

Unilateral Tolerance Measurement

The deviation is only permitted on one side of the nominal value in this tolerance measurement. This means that if the nominal size of a shaft to go into a bearing is 20mm, a shaft larger than that size will not fit. As a result, machinists only permit deviation on the smaller side of such a shaft.

Bilateral Tolerances

Tolerance of this type allows for a variance on both sides of the nominal value. It is typically represented as a +/- value. To clarify, if a machined item measures 25 mm and has a tolerance of +/- 0.05mm, the value can be between 24.95mm and 25.05mm.

It is essential to understand when to select tighter tolerances for your part-maker. Although tight tolerances are not required for the entire product, critical structural pieces, such as those that fit into other components, require little deviation from the nominal value since inaccuracy can jeopardize the part’s integrity.

Tolerances are significant in precision CNC machining operations because they lower production costs and turnaround times. As vital as they are, they require much expertise and time to get correctly. CNC machines have a typical tolerance of 0.005 inches.

Precision Machining Methods and Equipment

Because of the extensive range of applications,CNC precision machining requires a wide range of machinery and equipment. Here are the machinery and equipment:

Precision Grinders

After machining parts/components, CNC precision machining grinders are one of the final manufacturing operations. Abrasive grinders (or wheels) are used in CNC precision machining grinding to provide a precisely flat surface with a smooth finish on machined objects. By removing little pieces of superfluous material, precision grinding can assist in generating close-tolerance finishes on a finished product.

CNC Turning

The workpiece spins around a central axis in CNC turning while a linearly moving cutting tool removes material from the workpiece. Unlike CNC mills, the cutting tool is normally non-rotary. Single-point cutting tools are most typically utilized in this operation.

CNC Drill Presses

The workpiece is stationary in Computer Numerical Control drill presses, while a rotating drill bit rotates around and drills holes in the workpiece. The holes could be for part assembly or aesthetic purposes. By adjusting the size of the drill bit, CNC drill presses can create a variety of hole sizes. The hole depth can be modified by changing the CNC machine tool calibration.

CNC Milling Machines

CNC milling is a subtractive manufacturing procedure that uses rotary cutters to remove material from an object. Different cutting effects can be achieved by varying the angle, direction, pressure, and cutting tool speed. CNC milling machines have various configurations, including bed, box, planer style, C-frame, gantry, horizontal boring, floor, knee, turret, and ram milling machines.

Electrical Discharge Machining

Electrical discharges (sparks) shape metal in Electrical Discharge Machining (EDM). This procedure is known as spark machining, die sinking, wire erosion, or spark eroding. Because metals carry electricity, electrical discharge machining can only be used on metals.

It employs two electrodes: one for the tool and one for the workpiece. This machining procedure brings The two electrodes close to each other but does not establish physical touch.

An electrical arc forms between the electrodes, boosting the temperature of the part’s electrode and melting the metal. Due to the difficulty of cutting the hardest metals using milling machines, EDM applications typically incorporate them. EDM is frequently used to make holes, slots, and tapers in gears.

Multi-axis CNC Machining

CNC multi-axis machining is a complete machining system. The tool can move in four or more directions. Multi-axis CNC machining allows for the production of complicated parts utilizing various cutting tools and methods, such as milling, waterjet cutting, and laser cutting.

Swiss Machining

Swiss machining is an advancement over traditional CNC lathes. It uses specialist Swiss-made CNC lathes for economical and precise machining of parts. In classic CNC Swiss lathes, the headstock is stationary and merely turns the workpiece. However, with Swiss Machining, the headstock allows for linear movement and more precise and sophisticated machining possibilities.

Mill Turning CNC Centers

CNC mill turning centers, also known as CNC mill-turn machines, combineprecision milling and turning processes. Milling and turning have always been done on separate CNC machines. However, combining them into a single CNC machine can considerably simplify the manufacturing process.

CNC mill-turn centers are offered in vertical and horizontal designs. Because of the effect of gravity on the setup, the vertical layout is regarded as more stable. Aside from the moving headstock, a sliding guide bush moves along the workpiece’s longitudinal axis. The guiding bush supports the workpiece during high-precision machining.

CNC Laser Machines

A high-frequency laser beam is used in CNC laser machining to slice or etch materials. Unlike EDM machining, laser machining can machine both metals and non-metals.

CNC Precision Machining Applications

CNC Precision machining is gaining popularity in the manufacturing industry because of its numerous applications, low cost, and quick turnaround times. The method is frequently utilized in a variety of industries, including:

Automotive Industry

Automobile manufacturers must design prototypes of these CNC machined parts before production as innovations are added to their current car revisions. CNC precision machining is in charge of developing these prototypes to exact specifications. The technique also produces components for other modes of transportation, such as shipping vessels, transport trucks, and others.

Medical Industry

Medicine is rapidly evolving, requiring the acquisition of new precision CNC machining equipment. They need large quantities of existing equipment in addition to new ones. Precision CNC machining is in charge of producing this equipment. Examples include orthotic devices, safe enclosures, implants, MRI machines, research equipment, and other such items.

Military and Defense Industry

CNC has never been more important, with various nations developing their ideas for new ammunition and defense systems. All of these ideas are brought to life by the precision machining process, which employs a variety of materials and methods. Examples include plane parts, transportation components, communication components, ammunition, and other items created for this industry.

Aerospace Industry

Aerospace vehicles, from transportation planes to space shuttles, require highly accurate contraptions because a single inaccuracy could seriously harm the various aeronautical vehicles. CNC precision machining produces multiple components in this business, including landing gear ports, bushings, manifolds, airfoils, etc.

Advantages of High Precision CNC Machining

Using these high-precision devices in your production process will undoubtedly bring numerous benefits.High-precision machining is the most cost-effective option, especially if you only need a few to a hundred items. Due to the mold production expenses, the procedure requires a lower upfront cost than injection molding.

Compared to injection molding, CNC machines give a faster rate of speed. In contrast to injection molding, which can take months to create a mold and guarantee the machined parts are within tolerance, CNC machining can deliver items in weeks.

Disadvantages of High Precision CNC Machining

Despite the numerous benefits of CNC precision machining, companies should exercise caution when requiring close tolerances. While CNC precision machining may be required for particular features and dimensions, requiring CNC precision machining when normal machining tolerances would suffice can be a huge waste of resources.

This is because a part with a 0.01 mm tolerance may necessitate a completely different machine configuration than a feature with a 0.05 mm tolerance, significantly boosting labor costs. If your request for quotation (RFQ) yields a higher estimate than expected, consider lowering tolerances for non-critical parameters.

Suitable Materials for Precision Machining

Precision machining can be used on various metals, polymers, and composite materials. Here are some commonCNC machining materials for precise machining:

Metals and Alloys

• Brass
• Stainless Steel
• Carbon Steel
• Bronze
• Copper
• Titanium
• Exotic Alloys
• Aluminum
• Steel
• Tool Steel

Plastics and Other Non-metals

• Polycarbonate (PC)
• Acrylonitrile Butadiene Styrene (ABS)
• Graphite
• Polyoxymethylene (POM)
• Glass
• Polymethyl Methacrylate (PMMA)
• Polyamide (PA)

Cost of Precision CNC Machining

There is no definite cost for precision machining because expenses vary depending on various factors. CNC machining has several different components, each with a varied price. For example, the number of axes can be selected in precision machining equipment.

When hourly rates are compared, a multi-axis machine can cost two to three times as much as a three-axis machine. Additional expenditures include the designer’s fee for the Computer Aided Manufacturing (CAM) plan, the hourly labor cost of a precision machinist, and so on.

Conclusion