.16 Hole Single Station Combination Drilling Design And Experimental Research

In view of the actual conditions of enterprises and on the basis of overall analysing workpiece structure features , accuracy of size, surface roughness, accuracy of distance between drilled holes and other technical requirements, this article points out that the existing equipments used to manufacture workpieces may result in lower productivity, greater intensity of labour and worse working accuracy. Therefore, it is necessary to develop a new type of 16 hole single working position combination drilling machine.Through analysia and comparison, the article has determined the best project of the structure and the disposition of the 16 holes combination drilling machine. According to the priciple of standardization, generalization and serialization in machine design, the article offers the master design of the drilling machine, the process drawing of workpiece, the working diagram, the connection dimentional drawing of the drilling machine and the calulating card of productivity. In some key parts of the drilling machine, there are certain new designs on the structure of the spindle box and the fixture. With 16 hole drilled simultaneously on the drilling machine, in addition to small spacing between holes and dispersive arrangement of hole position, the 16 holes drilling program cannot be completed in conventional way. In the transmission system of 16 hole drilling machine are used some new structural designs such as pin bearings and position-changeable gears, so that the arrangement of hole position, which cannot be finished in conventional way, can be accomplished. The combination drilling machine is applied a fast spiral pinch machinery whose features are not only shortens the time consumed in loading and unloading workpiece but also enhances productivity.After the experimental result of the new type of 16 hole combination drilling machine is compared with the one of the original working program, there are following prominent advantages:1. Enhancing productivityIf the workpiece is cut with 16 drills on the combination drilling machine, the auxiliary time would be shortened and the working cycle time would be limited within 2.7min. On the other hand, if the workpiece is cut on the general-purpose drilling machine, its working cycle time would take 15min on an average, the productivity would...