Dynamic balance structure of double-acting high-speed press

Abstract

The invention discloses a dynamic balance structure of a double-acting high-speed press. The dynamic balance structure comprises a crankshaft, inner sliding blocks, inner sliding block connecting rod assemblies, outer sliding blocks, outer sliding block connecting rod assemblies, a dynamic balance sliding block and a dynamic balance connecting rod assembly; a pair of first eccentric cranks are symmetrically arranged on the two sides of the crankshaft; a pair of second eccentric cranks are symmetrically arranged on the two sides of the crankshaft; a third eccentric crank is positioned on a symmetric center line; the inner sliding blocks are connected with the first eccentric cranks through the inner sliding block connecting rod assemblies; the outer sliding blocks are connected with the second eccentric cranks through the outer sliding block connecting rod assemblies; the dynamic balance sliding block is connected with the third eccentric crank through the dynamic balance connecting rod assembly; the included angle between the eccentric direction of the second eccentric cranks and the eccentric direction of the first eccentric cranks in the clockwise rotation direction of the crankshaft is alpha; and the included angle between the eccentric direction of the second eccentric cranks and the eccentric direction of the third eccentric crank in the clockwise rotation direction of the crankshaft is 180degrees -(180 degrees + alpha). According to the dynamic balance structure, 96%-99% of inertia force in the vertical direction of the double-acting high-speed press can be effectively balanced.

Description

technical field [0001] The invention relates to the technical field of presses, in particular to a dynamic balance structure of a double-acting high-speed press. Background technique [0002] The number of strokes of the slider of the high-speed press is usually much higher than 200 times per minute, and currently the highest reaches more than 3000 times per minute. Inertial force is inevitably generated when the crank-slider mechanism is in operation. For ordinary presses, the inertial force is relatively small due to its low motion speed and can be ignored. But for high-speed presses, if the rotary parts and reciprocating parts cannot achieve dynamic balance, the effect of the inertial force becomes quite obvious. If necessary measures are not taken in the structure, the periodically changing inertial force generated by the unbalanced mass in the rotary part will cause the strong vibration and noise of the foundation bed to increase significantly, which will seriously aff...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, it is often only possible to balance the unbalanced force in the single-acting high-speed press. Since the crankshaft in the double-acting high-speed press rotates once, two asynchronous stamping actions are completed at high speed, and the vertical direction The inertial force is greater than that of single-acting high-speed presses. The traditional method of balancing the unbalanced force of single-acting high-speed presses cannot effectively solve the dynamic balance problem in double-acting high-speed presses.

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