| Abstract [eng] |
This final project analyses manufacturing of the crankshaft hot forging dies and possibilities of modernisation. An analysis of rough and smooth milling operations was made. The programmes and milling cutters, used for the rough and smooth milling of the hot forgoing dies, were identified. The longest-duration milling programmes and used milling cutters were identified. The solution was proposed to use milling cutters with hard alloy replaceable heads, high speed spindles and shrink-fit milling tool holders during the rough and smooth milling operations. Aiming to decrease the manufacturing duration of the hot-forging dies, while ensuring the required quality of the final product, the corrections have been made in the programmes of rough, as well as smooth milling. The milling cutters, used for the most long-lasting operations, were replaced by the hard-alloy replaceable head milling cutters. The cutting regimes were calculated. The high speed spindles have been introduced in smooth milling operations. Shrink-fit tool holders were used for the rough and clean milling. The comparison of the milling time of different operations before and after the modernisation is given. The principles of Lean manufacturing have been used for modernisation. Conclusions of the project are formulated and presented. |
