With the continuous development and progress of industrialization, the use of pipelines in various fields and occupations has played an increasing role.In particular, electric power, oil and other professions to the increasing demand for pipe parts, pipeline equipment requirements continue to improve, which encourages the pipeline industry to continue to carry out skills innovation.With the continuous progress of industrial production, the development of pipe fitting forming skills is particularly important.Pipe fitting processing and forming is the processing skill of pipe fitting parts required in production by means of plastic deformation.In order to use the output of elbow can be satisfied with a variety of needs, skilled workers and many scholars have carried out a lot of tests and research, the processing technology of elbow constantly carry out skills innovation, so that the processing technology of elbow is improved.It is an important step to improve the bending production skill to simulate the bending forming skill.

With the continuous development of society, ships, petrochemical and gas industries such as the demand for elbow pipe fittings is more and more, elbow pipe fittings in these occupations are mainly used to transport liquid and gas.At present, the main problem to be solved in the production of elbow pipe fittings is on the one hand to speed up the forming rate of elbow pipe fittings, on the other hand to improve the forming quality of elbow pipe fittings, so we still need to work hard in improving the production level of elbow pipe fittings.