27.7 Rezumat, Referințe
În acest capitol, a fost prezentată și discutată o scurtă explicație a procesului de micro-prelucrare mecanică și a provocărilor acestuia. Cerințele pentru micro-caracteristici și micro-componente în multe industrii sunt în creștere, provocarea fiind, în special, fabricarea acestor produse folosind un proces optim. Micro-prelucrarea mecanică este unul dintre procesele alternative datorită avantajelor sale. Însă, provocările legate de acest proces, cum ar fi efectul mărimii, microstructurile materialelor, calitatea suprafeței, bavurile și, de asemenea, performanța sculelor trebuie studiate și rezolvate, astfel încât procesul de micro-prelucrare să poată avea performanțe mai bune în producerea de micro-trăsături. Sunt oferite mai multe soluții pentru a face față acestor provocări:
In this chapter, a brief explanation of the mechanical micro-machining process and its challenges has been presented and discussed. The demands for micro-features and micro-components in many industries are increasing with the challenge being especially to manufacture these products using an optimum process. Mechanical micro-machining is one of the alternative processes due to its advantages. However challenges related with this process such as size effect, microstructures of materials, surface quality, burrs, and also tool performance need to be studied and solved so that the micro-machining process can have better performance in the production of micro-features. Several solutions are offered to encounter these challenges:
1. Efectul mărimii poate fi minimizat prin utilizarea sculelor diamantate; dar, aceasta nu poate fi aplicată pentru materiale feroase.
2. Efectul microstructurilor multifazice ale materialelor poate fi minimizat prin prepararea de granulații mai fine și omogene în materiale.
3. O bună calitate a suprafeței poate fi obținută prin utilizarea parametrilor optimi de tăiere și modificarea microstructurii piesei de prelucrat.
4. Problema bavurilor poate fi evitată prin optimizarea parametrilor de tăiere și folosind un proces suplimentar de debavurare.
5. Modificările sculelor pot fi aplicate pentru a avea o performanță mai bună a micro-sculelor.
1. The size effect can be minimized by using diamond tools; however it may not be applied for ferrous materials.
2. The effect of multiphase microstructures of materials can be minimized by preparing finer and homogenous grains in the materials.
3. Good surface quality can be achieved by using optimum cutting parameters and modifying the microstructure of the workpiece.
4. The burr problem can be avoided by optimizing cutting parameters and using an additional deburring process.
5. The tool modifications can be applied in order to have better performance of the micro-tools.
Soluțiile unei probleme nu trebuie să provoace apariția altor probleme, deoarece problemele sunt legate între ele și influențează simultan performanța procesului și calitatea piesei prelucrate. Mai multe soluții alternative trebuie investigate pentru a optimiza procesul de micro-prelucrare mecanică.
The solutions of one issue must not cause other issues to appear since the issues are related to each other and simultaneously influence the process performance and quality of the machined workpiece. More alternative solutions need to be investigated in order to optimize the mechanical micro-machining process.
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