Introduction: Metal processing online reporters participated in the annual meeting of China's steam turbine industry for two consecutive sessions in 2011 and 2012. Now, the problems presented by various experts will be sorted out. Some of the problems are enterprise cases, after exchanges, and some have been resolved; Some are common problems in the industry, hoping to attract the attention of our tool experts.
Dong Liu Liu Guangyao:
How to improve the processing efficiency of composite plate drilling? There are titanium composite plates, as well as stainless steel composite plates, which are equipped with tens of thousands of holes, especially the processing of stainless steel composite plates. The use of imported Qiankun drills can basically solve the problem, but the efficiency needs to be improved. Drilling of the stacking plate is a big problem. Dongqi has spent two months doing drilling tests on the stacking plate because the gap between the stacking plates is large, and some of them reach 2.5mm. The gap is still changing during the cutting process, and the drill bit is easy. damage. With Kyocera's magic drill, the drill bit can be changed. Each drill bit can drill more than 300 holes to achieve the desired target, but the cost is high and it is hoped to be further improved.
How to make stainless steel pieces easy to break when turning? When machining rotary blades on a turning-milling machine tool, the material is stainless steel, the material is soft, and it is not easy to break the chips during turning, which seriously restricts the processing efficiency.
How to improve the processing efficiency of superalloys? Machining of high-temperature alloys (600 ° C), turning, milling and threading, mainly based on carbide tools, the performance of Strath's tools is better than other tools, but the efficiency needs to be further improved, I have tried CBN tools and ceramics. Tools, but these tools (especially ceramic tools) require a high rigidity for the workpiece. So, how to improve the processing efficiency of superalloys?
How to reduce the surface roughness of the workpiece during low speed turning? A high cutting speed is required for turning to obtain a good surface quality, but some workpieces cannot be rotated at a high speed, such as a cylinder of a gas turbine, so that the surface roughness is not satisfactory. How to improve the surface quality? If the grinding equipment is added to the vertical car, the grinding machine will definitely affect the lathe due to the poor sealing performance of the lathe; if the rolling method is adopted, it is easy to deform the workpiece due to the large pressure, so it is still desirable to remove the tool. Solve the problem by itself (such as angle).
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