Punch is generally divided into several?

The drive force of the slide driving force different points can be divided into two kinds of mechanical and hydraulic, presses it in accordance with its use of the driving force divided into:

(1) Mechanical presses (Mechanical Power Press)

(2) hydraulic press (Hydraulic Press)

Ordinary sheet metal press work, most of a mechanical press. Hydraulic press according to their use of different liquids, with a hydraulic press with a hydraulic press using a hydraulic press majority, a hydraulic press machine is used for jumbo or special machinery.

Sorted by slide motion

According to the slider movement pattern classification single-action, double action, such as three dynamic punch, only the most used by a single slide of a dynamic punch, and three dynamic multi-action press is mainly used in car bodies and large workpieces extension of processing, their number is very small.

According to the slider driving mechanism classification

(1) a crankshaft Presses (Crank Press)

Press using a crankshaft mechanism called crank press, punch press as shown in one crankshaft, most of the mechanical presses

Use this body. The reason for using the most crank mechanism is easy to manufacture, can be accurately determined stroke of the lower end of the seat, and the slide curve substantially activities to various practical working. Thus, in this type of punching press practical, bending, stretching, hot forging, warm forging between, almost all cold forging and other processing punch.

(2) non-crank-type press (Crankless Press)

No crank-type punch press, also known as an eccentric gear, the eccentric gear is FIG two punch. In measuring the eccentric crank-type gear press punch function configuration of the two, as shown in Table II, the eccentric shaft gear rigidly press configuration, lubrication, appearance, enjoying superior to the crankshaft construction, the disadvantage is the high price. Longer stroke, punch press is more conducive to the eccentric gear, while such a short stroke of the punching machine special case, is the preferred crank press, so the minicomputer and high-speed punching presses and the like are used the art crank press.

(3) toggle press (Knuckle Press)

Use the slider driving the toggle mechanism are known as toggle presses, shown in Figure III. Ram speed near the bottom dead center of the press having this becomes extremely slow (and crank press measure) of the original active contour slider, shown in Figure IV. But also the right decision to travel under the seat dead, so this is suitable for coining presses and finishing etc. compression processing, today's cold forged between the most used.

(4) friction punch (Friction Press)

Friction transmission mechanism on the spiral track known as friction-type punch press drive. This optimum forging presses, crushing operations, can also be used for bending, forming, stretching of processing, having the function of versatility, low cost because, before the war been widely used. Can not be determined due to the lower end of the seat travel, poor processing accuracy, production is slow, will create a control operation when the overload error, and the like require skilled technical drawbacks use today is gradually being phased out.

(5) screw type presses (Screw Press)

Slider driving mechanism using a screw mechanism are known as spiral press (press or screw).

(6) rack punch (Rack Press)

Using a rack on the slide mechanism with the drive mechanism are rack-pinion called punch. Spiral rack punch presses and have nearly identical characteristics, features and characteristics which is substantially equivalent to the hydraulic press. Previously pressed into the bush for pressing, and other items of debris, oil, packing, and the shell of the extrusion (the extrusion process to heat thin) or the like, but so far completed substituted hydraulic presses, unless very special outside the situation is no longer used.

(7) press-link (Link Press)

Using a variety of punch-link linkage is referred to press the slider driving mechanism. Purpose of link mechanism, while the stretching speed is maintained within the limits during extension processing, the processing cycle while narrow, extension with a reduced speed for processing change, accelerating from the top dead center to the machining start point of the stroke of the proximity oriented bottom dead center velocity of the return stroke of the dead point, so as to have a shorter period than the crank press, in order to improve productivity. Such presses are used since ancient times deep extension of the cylindrical container, narrow mesa bed, it is used in the manufacture of automotive body panels, wide mesa bed.

(8) cam punch (Cam Press)

The cam mechanism called a punch press cam drive mechanism on the slider. This feature is made properly punch cam-shaped, so as to easily obtain a desired slider active trace. But because of the nature of the cam mechanism is difficult to convey a greater effort, so this little punch capability.