模锻主要靠锻模模膛使坯料成形，锻件形状比较复杂。但为减少制模成本和简化模锻工艺，设计模锻零件时，应根据模锻特点和工艺要求，使零件结构符合下列原则，以便于模锻生产和降低成本。
The die forging is mainly formed by forming the blank of the forging die, and the shape of the forgings is more complex. However, in order to reduce the cost and simplify the die forging process, we should design the die parts according to the characteristics and process requirements of die forging, so as to make the part structure conform to the following principles, so as to facilitate the forging production and reduce the cost.
(1)模锻零件必须具有一个合理的分模面，以保证模锻件易于从锻模中取出，又利于金属充填、减少余块和敷料，锻模容易制造。
(1) the die forging part must have a reasonable parting surface to ensure that the die forging is easily removed from the forging die, and is also good for metal filling, reducing the remaining blocks and dressing, and forging dies are easy to make.
(2)与分模面垂直的非加工面应设计出模锻斜度，以利于从模膛中取出锻件。非加工面的交接处应采用圆角过渡，以利于金属在模膛中流动充填和防止产生应力集中。
(2) the slope of die forging should be designed for the non machining surface perpendicular to the mold surface to facilitate the removal of forgings from the die chamber. The transition of the non - machined surface should be made of a round angle to help the metal flow and fill in the mold and prevent the stress concentration.
(3)应避免筋的设置过密或高宽比过大，以利于金属充填模膛。
(3) the overdensity of the reinforcement should be avoided or the ratio of height to width should be too large to facilitate the filling of the metal mold.
(4)为了减小变形抗力，使金属容易充满模膛和减少工序，零件外形力求简单、平直和对称，尽量避免零件截面间差别过大， 腹板过薄，或具有薄壁、高筋、凸起等结构。零件的最小截面与最大截面之比如小于O.5就不宜采用模锻方法制造。此外，该零件的凸缘薄而高，中间凹下很深也难于用模锻方法锻制。图5—50b所示零件扁而薄，模锻时薄的部分金属容易冷却，不易充满模膛。
(4) in order to reduce the deformation resistance and make the metal easy to fill the mold cavity and reduce the working procedure, the shape of the parts is simple, straight and symmetrical, so as to avoid the difference between the cross sections of the parts too large, the web is too thin, or has the structure of thin wall, high bar and bulge. The minimum section and the maximum section of the part are less than O.5, which should not be made by forging. In addition, the flange of the part is thin and high, and it is hard to forge by die forging in the middle of the concave. The parts of Figure 5 - 50B are flat and thin, and the thin parts of the metal are easy to cool and are not easy to fill.