1, The article is about how to adapt air hammer to perform local upsetting operation.

2, This paper collects the typical structure of air hammer, understands the principle, determines the design principles and methods.

3, Literature research of air hammer drilling in domestic and overseas.

4, A computerized overall forging system's model including hammerer, air hammer and forging part was developed.

5, The article is about how to adapt air hammer to perform local upsetting operation. The project design of technology, equipment re form and die design etc has been clearly illustrated in the artide.

6, Living examples in repair of air hammer parts by manual bead welding of electrical are have been introduced, which are useful for lengthening service life of air hammer parts and saving cost.

7, An air hammer is a kind of pneumatic tool for industrial use.

8, To the critical problem of air hammer ,[http:///air hammer.html] the article evolves some research work.

9, Finally, the paper presented the problems existed in the aspect of using air hammer for geophysical drilling and the direction of studied d.

10, By means of progressive regression method, a mathematical model of the air hammer was developed.

11, A study on forging process with a type of the C41-75 air hammer was carried out from the viewpoint of man machine systems.