What is fine die
What is fine die
The punching die introduced above can be called ordinary punching die, which is characterized by the use of normal punching gap and commonly used die structure. Ordinary blanking dies have a wide range of practicability and good comprehensive technical and economic benefits, so they are also the most used blanking processing methods. However, the blanking parts of ordinary blanking processing have serious defects in quality, such as low dimensional accuracy and poor section quality. In order to meet the higher requirements of some products on the quality of blanking parts, many special blanking methods have appeared, each of which has its own outstanding characteristics.
Developed on the basis of ordinary stamping technology, a press plate with a strong gear ring is used to force the material into the material, thereby causing radial stress. A fine blanking process that can obtain a smooth section through one stamping stroke is called fine blanking. It is used to replace the complicated processes of various cutting processes after trimming and blanking, thereby changing the blank production nature of stamping production technology, enabling it to directly provide sheet metal stamping parts that meet product assembly requirements, reducing costs and improving quality. the goal of.
In short, stamping is carried out on a three-action special fine-stamping press or a modified ordinary press with a special structure die under the condition of exerting strong pressure on the strip, so as to obtain small dimensional tolerance, high shape and position accuracy and cutting edge. For precision stamping parts with smooth and flat cut surfaces, this kind of precision stamping die is usually called a fine stamping die (as shown in Figure 1-6, it is a fan-shaped tooth plate fine stamping die).
Figure 1-6 Fine blanking die for sector tooth plate
1 a limit column; 2 a gear ring pressure plate; 3 a stopper pin; 4 exhibition protection pin concave; 6, 20 fixed plate; 7, 8, 12 punch; 9 a push rod; 10 a discharge screw; 11 , 21 a backing plate; 13 a push pepper (and pressure plate); 14 – a quick seat; 15 a guide sleeve; 16 a guide post; 17, 19 a pressure plate; rod
