Detection positioning structure and method and automobile part X-ray detection equipment and method

The invention provides a detection positioning structure, a positioning method, an automobile part X-ray detection device using the structure, and a detection method. The detecting and positioning structure comprises an X-ray tube moving and swinging mechanism, an imaging plate moving mechanism, a detecting assembly line, a tube head optical shutter and a positioning sensor; after each moving shaft is automatically positioned according to an instruction of an upper computer, high voltage is started, a transillumination picture is automatically grabbed, then each shaft is positioned again according to the instruction of the upper computer, automatic picture grabbing, re-positioning and final discharging are executed in a reciprocating mode, thereby completing the high-efficiency detection of a certain automobile part. The equipment is easy to operate by operators, reduces positioning errors, overcomes the defects that conventional detection equipment needs to manually adjust the detection position and complex