The servomotor drive turret punch press is attracting more attentions and being developed more intensively due to the advantages of high speed,high accuracy,high flexibility,high productivity,low noise,cleaning and en...The servomotor drive turret punch press is attracting more attentions and being developed more intensively due to the advantages of high speed,high accuracy,high flexibility,high productivity,low noise,cleaning and energy saving.To effectively improve the performance and lower the cost,it is necessary to develop new mechanisms and establish corresponding optimal design method with uniform performance indices.A new patented main driving mechanism and a new optimal design method are proposed.In the optimal design,the performance indices,i.e.,the local motion/force transmission indices ITI,OTI,good transmission workspace good transmission workspace(GTW) and the global transmission indices GTIs are defined.The non-dimensional normalization method is used to get all feasible solutions in dimensional synthesis.Thereafter,the performance atlases,which can present all possible design solutions,are depicted.As a result,the feasible solution of the mechanism with good motion/force transmission performance is obtained.And the solution can be flexibly adjusted by designer according to the practical design requirements.The proposed mechanism is original,and the presented design method provides a feasible solution to the optimal design of the main driving mechanism for servo punch press.展开更多
Recently,the China E-Business Research Center(100EC.CN)released the'2015 Monitoring Report of China E-business Market'.The report says that the China E-business transaction volume amounted to 18.3 trillion yua...Recently,the China E-Business Research Center(100EC.CN)released the'2015 Monitoring Report of China E-business Market'.The report says that the China E-business transaction volume amounted to 18.3 trillion yuan in 2015,up by 36.5%from a year ago,and marking an increase of 5.1 percentage points in growth rate.Meanwhile,the B2B E-business trade value totaled 13.9 trillion yuan,up展开更多
Some concrete methods are suggested in the article to control noises in main driving system of XK-736-type NC miller by analyzing working conditions of gears in the main driving system and bearings in the spindle gear...Some concrete methods are suggested in the article to control noises in main driving system of XK-736-type NC miller by analyzing working conditions of gears in the main driving system and bearings in the spindle gearshift system. Without changing the original design, noises are reduced ideally by modifying gear top, and by controlling the profile error ; the central distance of meshing gear, the quality of the inner and outer rings of bearings ; and the fit accuracy among bearing, hole and axis. The results may provide a reference for diagnosing and maintaining in future use.展开更多
It was during the weekend that Miss Wu lover a shop selling the luxury brand Louis VThrough the window, she could indulged in the filled with all kinds of handbags, dustcoats anheels-all she yearned for. But she tarri...It was during the weekend that Miss Wu lover a shop selling the luxury brand Louis VThrough the window, she could indulged in the filled with all kinds of handbags, dustcoats anheels-all she yearned for. But she tarried on thand found herself embarrassed to enter.展开更多
基金supported by National Natural Science Foundation of China(Grant No.51021064)National Key Scientific and Technological Program of China(Grant No.2010ZX04004-116)
文摘The servomotor drive turret punch press is attracting more attentions and being developed more intensively due to the advantages of high speed,high accuracy,high flexibility,high productivity,low noise,cleaning and energy saving.To effectively improve the performance and lower the cost,it is necessary to develop new mechanisms and establish corresponding optimal design method with uniform performance indices.A new patented main driving mechanism and a new optimal design method are proposed.In the optimal design,the performance indices,i.e.,the local motion/force transmission indices ITI,OTI,good transmission workspace good transmission workspace(GTW) and the global transmission indices GTIs are defined.The non-dimensional normalization method is used to get all feasible solutions in dimensional synthesis.Thereafter,the performance atlases,which can present all possible design solutions,are depicted.As a result,the feasible solution of the mechanism with good motion/force transmission performance is obtained.And the solution can be flexibly adjusted by designer according to the practical design requirements.The proposed mechanism is original,and the presented design method provides a feasible solution to the optimal design of the main driving mechanism for servo punch press.
文摘Recently,the China E-Business Research Center(100EC.CN)released the'2015 Monitoring Report of China E-business Market'.The report says that the China E-business transaction volume amounted to 18.3 trillion yuan in 2015,up by 36.5%from a year ago,and marking an increase of 5.1 percentage points in growth rate.Meanwhile,the B2B E-business trade value totaled 13.9 trillion yuan,up
基金supported by the University Research Projects of the Education Department of Zhejiang Province in 2011 under Grant No.Y20111926
文摘Some concrete methods are suggested in the article to control noises in main driving system of XK-736-type NC miller by analyzing working conditions of gears in the main driving system and bearings in the spindle gearshift system. Without changing the original design, noises are reduced ideally by modifying gear top, and by controlling the profile error ; the central distance of meshing gear, the quality of the inner and outer rings of bearings ; and the fit accuracy among bearing, hole and axis. The results may provide a reference for diagnosing and maintaining in future use.
文摘It was during the weekend that Miss Wu lover a shop selling the luxury brand Louis VThrough the window, she could indulged in the filled with all kinds of handbags, dustcoats anheels-all she yearned for. But she tarried on thand found herself embarrassed to enter.
