xiehe model

Optical precision cnc machining is essential to the creation of the modern optical industry. We use CNC to process optical precision parts. At Xiehe, we offer 3-axis sums. Optical parts are increasingly complex and require handling. With it came a new era of optical precision machining. When creating non-complex optical parts, we have several common methods. It requires polishing and normal grinding procedures. However, we can only partially create complex optical components using these conventional methods. This is because of their lack of dimensional accuracy. In this case, our team of experts opted to use multi-axis machining.

Micro and aspheric optics often require very tight tolerances. Fortunately, the precision cutting process provides this required precision. They use diamond tools on ultra-precise tools to achieve this. So we end up with tight tolerances and a high surface finish. We use this method to achieve proper dimensional accuracy of optical parts and their molds. Here is further insight into this.

What are the ultra-precision production methods for optical parts?

There is an ideal way to fabricate complex micro-optical components. This is achieved simultaneously with a first-class surface quality down to a fraction of a micron Ra. It requires the use of ultra-precision tools and diamond cutters. Obtaining freeform surfaces, complex geometries and real 3D parts requires top-level expertise. We sometimes have to use some unique multi-axis machining methods.

There are few methods used by machinists in optical precision machining. These include laser machining, EDM, grinding, micro-cutting and silicon etching. Optical processing requires processing on planar and freeform optical surfaces. Microdissection is the only way to achieve the required structural size, precision and precision on both optical surfaces.

What are the tool factors for optical precision machining?

Two main factors determine the production quality of optical parts. These are the tip roundness and sharpness of the knife. Therefore, we had to include special tool geometries. These include ball nose end mills, diamond micro end mills and other turning and forming tools. There are several ultra-precision cutting methods for optical parts. They are fly cutting, end mill cutting, plunge cutting, and fast tool cutting.

Our team of experts sometimes combines vibration-free CNC machines with compact tool holders and fixtures. This allows the single point diamond cutting tool to effectively scrape material from the workpiece. This method ensures very high and concentrated cutting forces on the workpiece. So we end up with almost no dents elsewhere, while maintaining perfect shape accuracy and surface finish. This enables us to achieve optical precision machining.

What is single point diamond tool turning?

We apply this type of machining when we want to obtain rotationally symmetric optical parts. It is one of the most efficient cutting processes. This method achieves high cutting speed and high surface finish at Ra less than 5. The tools we use in this method take into account the accuracy of the part in production.

Our experts often calculate the tool radius as well as the compensation of the entire tool during the machining process. Also, we have to be extra careful when dealing with precision in the sub-micron range. This involves controlling the waviness of the tool at the level of 0.1um of the tool radius. Also, if we need a simpler surface structure, we use plunge cutting with pointed tools. These methods help us achieve optical precision machining.

CNC milling

CNC milling is a great choice when machining complex surface geometries. We sometimes use it to achieve the surface treatment of freeform surfaces. Examples of optical components we are able to manufacture include camera lenses and vehicle lighting prototypes. When machining these parts, we need at least one three-axis CNC machine tool. In contrast, we need a 5-axis machine to obtain precise optical surface features. In this case, we used three main diamond CNC milling tools. They are end mills, fly cutting and ball nose end mills.

Ball nose milling cutters are critical when dealing with freeform surface features. This is because they can handle geometries up to 0.5mm. Our professional machining service enables us to achieve inner corner accuracy up to R0.1-R0.15mm. Fly cutting tools are ideal for groove cutting. Also, we can use them when working with planes. For example, we use it to process laser mirrors and pyramid parts.

What is the key role of optical precision machining in the modern world?

It is worth noting that the demand for optical components is currently at its peak. This is accompanied by a growing consumer market for electronic components. Notable for use in DSLR cameras, smartphones and printer scanning mirrors. This presents a task challenge for the market. The main question is how to cost-effectively produce free-form optical components. Fortunately, precision machining allows us to achieve this goal. We ended up replacing the normal camera lens with a single freeform mirror part. This makes it compact while saving production costs.