Can VMC 850 perform multi - face machining? - Blog

As a supplier of the VMC 850 vertical machining center, I often receive inquiries from customers about the machine's capabilities, especially its potential for multi - face machining. In this blog, I'll explore whether the VMC 850 can perform multi - face machining, discussing its features, limitations, and practical applications.

Understanding the VMC 850

The VMC 850 is a popular vertical machining center known for its versatility and efficiency in various machining operations. It typically features a moving table and a fixed spindle, allowing for precise control of the cutting tool relative to the workpiece. With a standard X - axis travel of around 800 - 850mm, a Y - axis travel of approximately 500mm, and a Z - axis travel of about 500 - 600mm, the VMC 850 can accommodate workpieces of moderate size.

One of the key features of the VMC 850 is its ability to perform high - precision machining. It is equipped with a high - speed spindle that can reach speeds of up to 8000 - 12000 RPM, enabling efficient material removal rates. Additionally, the machine is often controlled by advanced CNC (Computer Numerical Control) systems, which provide accurate positioning and repeatability of machining operations. This makes it suitable for a wide range of industries, including automotive, aerospace, and general manufacturing.

Can the VMC 850 Perform Multi - Face Machining?

The short answer is yes, the VMC 850 can perform multi - face machining, but it depends on several factors. Traditional multi - face machining requires the ability to access different sides of the workpiece without re - clamping, which can be challenging for a standard VMC 850. However, with the use of appropriate accessories and techniques, it is possible to achieve multi - face machining on this machine.

1. Using Rotary Tables

One of the most common methods for enabling multi - face machining on a VMC 850 is by incorporating a rotary table. A rotary table is a device that allows the workpiece to be rotated around a central axis, enabling the machining of different sides of the workpiece without the need for re - clamping. There are two main types of rotary tables: indexing and continuous.
An indexing rotary table allows the workpiece to be rotated in fixed angular increments, such as 1 degree, 5 degrees, or 90 degrees. This is suitable for machining operations where the required angles are known in advance, such as milling the sides of a square or rectangular workpiece. On the other hand, a continuous rotary table can rotate the workpiece continuously at a controlled speed, which is useful for operations such as contour milling or drilling on curved surfaces.
By mounting a rotary table on the VMC 850's table, the machine can access multiple faces of the workpiece. For example, if you want to machine all four sides of a square workpiece, you can first machine one side, then use the rotary table to rotate the workpiece 90 degrees and machine the next side. This process can be repeated until all four sides are machined.

2. Using Indexing Heads

Similar to rotary tables, indexing heads can also be used to enable multi - face machining on the VMC 850. Indexing heads are typically used for smaller workpieces and can provide more precise angular control. They can be mounted on the machine's table or spindle and used to rotate the workpiece in small increments. This is particularly useful for machining complex features, such as gears or splines, where precise angular positioning is required.

3. Fixturing and Workholding Solutions

In addition to rotary tables and indexing heads, proper fixturing and workholding solutions are essential for successful multi - face machining on the VMC 850. Workpieces need to be securely held in place during machining to ensure accuracy and prevent vibration. There are various types of fixtures available, including vises, clamps, and custom - made fixtures.
For example, a tombstone fixture can be used to hold multiple workpieces simultaneously and allow for easy access to different sides of the workpieces. A tombstone is a vertical fixture that can be mounted on the VMC 850's table, with multiple faces or stations where workpieces can be attached. This enables the machine to machine different sides of the workpieces without the need for re - clamping.

Limitations of Multi - Face Machining on the VMC 850

While the VMC 850 can perform multi - face machining, it does have some limitations. One of the main limitations is the size and shape of the workpieces that can be machined. The VMC 850 has a limited working envelope, and very large or irregularly shaped workpieces may not fit within the machine's workspace. Additionally, the machine's spindle orientation (vertical) may restrict access to certain faces of the workpiece, especially if the workpiece has complex geometries.
Another limitation is the complexity of the machining operations. Multi - face machining often requires complex programming and toolpath planning. The CNC system of the VMC 850 may have limitations in terms of its programming capabilities, especially for very complex multi - axis machining operations. In some cases, additional software or post - processing may be required to generate the necessary toolpaths.

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Practical Applications of Multi - Face Machining on the VMC 850

Despite its limitations, multi - face machining on the VMC 850 has many practical applications. In the automotive industry, for example, the VMC 850 can be used to machine engine blocks, transmission cases, and other components with multiple faces. By using rotary tables and fixturing solutions, it is possible to machine all the necessary features on these components in a single setup, reducing production time and improving accuracy.
In the aerospace industry, the VMC 850 can be used to machine small to medium - sized aircraft parts, such as brackets and housings. Multi - face machining on these parts can improve the overall quality and performance of the aircraft by ensuring that all the features are machined with high precision and alignment.

Conclusion

In conclusion, the VMC 850 can perform multi - face machining with the help of appropriate accessories and techniques, such as rotary tables, indexing heads, and proper fixturing. While it has some limitations in terms of workpiece size, shape, and machining complexity, it is still a versatile machine that can meet the needs of many industries. If you are considering multi - face machining for your production needs, I encourage you to reach out to us to discuss your specific requirements and how our VMC 850 can be configured to meet them. We are here to provide you with the best machining solutions and support your manufacturing success.