Positioning structure of baseless pin

The utility model provides a positioning structure of a baseless pin. The baseless pin is positioned inside an installation hole of a die; a first hole which is distributed unparallel to the installation hole is arranged on the die; the first hole is communicated with the installation hole; a first positioning groove whose position corresponds to that of the first hole is disposed on the lateral side of the pin; and a vertical positioning pin which matched with the first groove is inserted inside the first hole and partially positioned inside the first positioning groove. Firstly, by arranging the positioning groove and the positioning pin on the lateral side and at the bottom of a movable mold of the die, the positioning structure of a baseless pin resolves the problem that the baseless pin moves vertically or rotates, and can fix the pin by means of drill fabricating. The fabricating is simple, does have high requirement for fabricating equipment, and can be completed through a drilling machine or a milling