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Pull-up type drill fixture
In the batch drilling process, since some of the workpieces are not well-formed in shape, it is necessary to adopt a flip-chip placement form in the drilling mold to facilitate the positioning and clamping of the workpiece. Under this condition, the clamping mode of the workpiece can be taken up and down on the drill mold according to the different characteristics and requirements of the workpiece. This is convenient for clamping operation, and can be applied to the processing of several types of workpieces of the same type, and can simplify the design and manufacture of the fixture. A main bearing cover of a diesel engine body is shown in Fig. 1, and its thickness dimension S and height dimension H are divided into three groups. When machining, the C, D, E, and F faces of the workpiece are not processed, and two symmetrical bolt holes and reaming holes are required to be machined on the machined surface M. The following two examples of the drilling of this kind of work are as follows.