Abstract
This design which includes mechanical design, mechanical drawing, digital processing technology and design of numerical control programming, such as basic knowledge of the fixture. I gear pumps in order to cover parts of the right to study, through in-depth access to a number of ideas and information, design and reasonable process and the preparation of
equipment at a reasonable level of processing technology and procedures. Institute found that the problem with rational thinking to deal with the problem and solve the problem. In order to achieve the ultimate objective of practical, so that their theoretical knowledge with practical knowledge and better together.
１． cover the right gear pump function and structure of the characteristics of the
Gear pump cover is the right gear pumps on the basis of one of the parts, some with their hands and sleeve assembly of parts such as gears together to keep each other in the right position, and in accordance with the transmission of a certain relationship between the co-ordination of movement. After the assembly of gear pumps, cover with the base machine installed in the plane. As a result, the right gear on the cover of the processing quality of the cabinet after the assembly of precision components have a decisive impact.
And his cabinet belong to Split, structural characteristics: the structure of the shape of a little complex, was an internal cavity, thick-walled box and uneven, and its many high precision bearings used in the assembly hole and the base plane. In addition, there are a number of less demanding precision fastening holes and secondary plane. As a result, gear pumps right to cover large parts of the processing, processing more difficult. ２． gear pumps cover the right materials and rough
Gear pumps use the right cover gray cast iron HT200, it is easy to deformation, vibration absorber of good wear resistance and good cutting and so on.
When the production volume is not right when the oil pump gear cover rough shape by hand using wooden mold, but the simple production of rough lower accuracy, is also a greater margin, a large number, when mass-produced metal mold machine model. Blank and high precision, to reduce the margin may be appropriate. In the production of one-piece, sometimes used for welding pieces of rough, so as to reduce the short production cycle
Key words
NC programming， processing，milling， gear pumps right end caps，clamping program