Research On The Machining Method And The Equipment Of Drilling-tapping Once Shaping

Mechanism manufacturing is the important foundation of industry ,and the forerunner department of county economy. Historic practice has proved again and again that it is so much important of the advanced equipment and manufacturing technology to county economy .As a result of the swift and violent development of the modern technology ,especially micro-electronics and computer technology ,mechanism manufacturing has already changed profundity and will continue to change .In addition to ,because mechanism technology is integrated with micro-electronics technology tightly ,especially the computer technology ,the traditional mechanism manufacturing technology has changed with each passing day and thoroughly remould itself,this paper wants to set about studying due to the above result.As we all know, the traditional operation of screwed hole includes two processes: at first drill a bottom hole which is less than the screwed hole (example: want to operate a screwed hole of M6x1 and at the beginning of drilling a bottom hole of ?5), and operate the thread of the hole with the screw tap at last. If we use this operation method, it is a very low production obviously and it can hardly satisfy the modern production requirement, especially with regard to mass production. After NC (numerical control) machines appear, the efficiency of operating the screwed hole increases very rapidly because of taking advantage of the automatic tool-changing capability. However, this method still includes two processes like before, namely drilling the hole at first and tapping at last. Moreover, the cost of this NC machine is very expensive.This paper wants to use the modern mature NC technology and combine one new type tool. And merge the tradition two processes of the operating the screwed hole into one process. It can improve the production efficiency very much.In the paper the main task is accomplished as following:1) Put forward the clew of screwed hole once shaping. We assume that the foreside of the multiple new type tool is the aiguille and the rear end is the screw tap. First drill a bottom hole of the screwed hole with the portion of aiguille. Second measure the rotary speed of the tool. The MCU outputs the right frequency pulse into the power amplifier according to the rotary speed and the standard of the screw. The power amplifier drives the stepping motor and makes the tool go down. The multiple movement can shape the screwed hole in the bottom hole. We have applied for a patent of this method and this multiple tool. The name of this patent is the special usage device of operating the screwed hole. The patent number is ZL0402111013.8.2) According to the above clew, we design and make the three-helix-groove multiple tool.