Different types of stamping press machine（2）

Classification according to slider driving mechanism

(1) Crank press(stamping press machine)
The punch using crankshaft mechanism is called crankshaft punch, crankshaft punch and most mechanical punch
Use this organization. The reason why the crankshaft mechanism is used most is that it is easy to make, can correctly determine the lower position of the stroke, and the sliding block activity curve is basically practical for all kinds of processing. Therefore, this type of stamping is used for punching, bending, stretching, hot forging, warm forging, cold forging and almost all other punch processing.

(2) Crankless press(stamping press machine)
Crankshaft free punch, also known as eccentric gear punch, eccentric gear punch. As shown in Table 2, the function of crankshaft punch and eccentric gear punch is better than that of crankshaft punch in terms of shaft rigidity, lubrication, appearance and maintenance, but the disadvantage is that the price is high. When the stroke is long, the eccentric gear punch is more favorable, and when the stroke of the special punching machine is short, the crankshaft punch is better. Therefore, small machines and high-speed punching and cutting punches are also the field of crankshaft punch.

(3) Knuckle press(stamping press machine)
Those who use toggle mechanism on slider drive are called toggle punch. This punch has a unique slider movement curve that the slider speed near the bottom dead center will become extremely slow (measured by crankshaft punch). It also correctly determines the dead center position under the stroke. Therefore, this punch is suitable for compression processing such as embossing and finishing. Nowadays, cold forging is most used.

(4) Friction press(stamping press machine)
The punch that uses friction transmission and screw mechanism on track drive is called friction punch. This punch is most suitable for forging and crushing operations. It can also be used for bending, forming and stretching. It has multi-purpose functions. It was widely used before the war because of its low price. Due to the inability to determine the lower end of the stroke, poor machining accuracy, slow production speed, overload will be established when the control operation is wrong, and skilled technology is required in use, it is gradually being eliminated.