Työstöjälki

Työstöjälki refers to the surface texture or pattern left on a material as a result of a machining process. This surface characteristic is a direct consequence of the tool's interaction with the workpiece, including the cutting edge geometry, feed rate, spindle speed, depth of cut, and the type of lubricant used. Different machining operations, such as turning, milling, drilling, or grinding, will produce distinct työstöjälki.

The appearance of työstöjälki can range from smooth and reflective to rough and textured, often exhibiting characteristic patterns like feed marks or tool marks. These marks are typically curvilinear or linear, depending on the relative motion between the tool and the workpiece. The study and control of työstöjälki are crucial in manufacturing for several reasons.

Firstly, it directly influences the surface finish, which affects the aesthetic appeal and functional properties of a part. A smooth työstöjälki is often desired for components that require low friction, good sealing, or high wear resistance. Conversely, a rougher surface might be acceptable or even desirable in applications where adhesion or a specific tactile feel is needed.

Secondly, työstöjälki can provide insights into the machining process itself. Analyzing the pattern and characteristics of the surface can help diagnose issues like tool wear, chatter vibrations, or improper machine setup. This diagnostic capability allows for process optimization and troubleshooting, ensuring the production of high-quality parts. In essence, työstöjälki serves as a fingerprint of the manufacturing process.