Improved analysis of press mechanism

If the open type press still adopts the cross-shaft structure of the crankshaft, the pneumatic friction clutch must be arranged in a cantilever manner, and the rigidity is poor. If the crankshaft is used vertically, the radial dimension of the clutch is not allowed to be too large due to the distance between the two large plates on the left and right sides of the fuselage. Therefore, the clutch should be placed on the high-speed shaft to reduce the torque transmitted, thereby achieving a reduction. Its purpose for radial dimensions.

If the original pressure machine is a first-class transmission, in order to make the clutch size not too large, the original first-stage open drive should be changed to a two-stage closed drive, and the clutch should be placed on the high-speed shaft. The original secondary drive can also be changed to a three-energy drive.

Pneumatic friction clutches and brakes are preferably mechanically interlocked in the form of motion coordination to make the interlock reliable and sensitive.

The open press slider has a high number of strokes (up to 100 to 200 beats/min), and the crank takes a short time (0.3 to 0.6 seconds). If using a valve interlock, a pressure relay or a travel switch In the case of interlocking, throttle interlocking, etc., due to the electrical lag action time of the control parts is too long, the crankshaft can not complete the determined action requirements within the specified angle, the press can not work normally, and the mechanical rigid interlock is used. The way is to make the structure simple.

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