The topic of my graduation design is "The machining process procedures and Fixture design of the Injection tail board " . The tail board is the most import part of Injection machine that cooperate with four bars , and can glide by the direction of the bars . The main function are installing hydraulic cylinder and connecting bars to form mold clamping force . This project is aim at designing the processing technic scheme of components and the corresponding fixtures used in special purpose to improve the production efficiency . First of all , I should make a analysis about the structure of tail board and technical requirements carefully , then refer to the relevant materials to determine a set of reasonable machining process procedures and parameters , such as : machining allowance、size、tolerance、cutting date of each process . Finished the process cards . In order to improve the labour productivity、reduce the intensity involved in the labour、ensure the processing quality , I should design some special fixtures .so that I choose the 14th course process of milling journal stirrup outside part to make the fixture design and make a analysis of clamp force and fixtures ' error、ensure the location of fixture , and the clamp scheme . Finally, assembly drawing of the fixtures .