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The principle of mechanical press

Mechanical presses at work (Figure 2), by electric motors via v-belt pulley driven pulley (usually doubles as a flywheel), gear and clutch driven crank-slider mechanism, the slide block and punch straight down. Slide return up after completion of the forging, clutch disengaged, and crank shaft on the brake switch on, make the slide stop in the vicinity of TDC.

Each slider-crank mechanism known as a "point". The simplest mechanical presses-single point, that is, only a crank-slider mechanism. Large face mechanical presses, for the force by the end of the slider even and smooth movement double or four points.

Load impact of mechanical press, forging work in one working cycle time is short. Short-term maximum power over more than 10 times larger than the average power, so set the flywheel in the transmission system. After the motor at average power, running to the rated speed of the flywheel, saving energy. Contact punch blanks began forging work, motor-driven power less than load, speed, flywheel to release the pent-up energy to compensate. Upon completion of the forging, flywheel again accelerated kinetic energy savings to prepare for the next use.

Press on the clutch and brake equipped with mechanical or electrical chain, in order to ensure clutch front brakes must be released, before brake clutch must be disengaged. Mechanical presses, single trip and inching operations into continuous (micro), most are achieved by controlling the clutch and brake. Slider stroke length is not changed, but its distance from the countertop bottom surface (called the seal height), can be adjusted by screw.

Production, likely more than nominal press force. To ensure safety, often fitted with overload protection device in the press. In order to ensure operator safety, presses on with opto-electronic or hand-operated personal protection devices.


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