A rolling shearing machine

Abstract

A novel rotary cutting type plate shearing machine comprises a rack, a power transmission part and a cutter frame connecting rod part. The rack is provided with an upper cutter frame. The upper cutter frame is provided with an upper cutter. The cutter frame connecting rod part comprises a lower cutter frame. A first connecting rod and a second connecting rod are hinged to the lower cutter frame. The power part comprises a main power gear and further comprises a first power gear and a second power gear, the first power gear is directly meshed with the main power gear, the second power gear is indirectly meshed with the main power gear, the first power gear is connected with the first connecting rod through a first eccentric mechanism, and the second power gear is connected with the second connecting rod through a second eccentric mechanism. The shearing machine has the advantages of being reasonable in structure, long in service life and high in shearing precision.

Description

technical field [0001] The invention relates to the technical field of metal cutting, in particular to a rolling shear type shearing machine. Background technique [0002] The lower blade of the rolling shear is arc-shaped, and the circular-arc blade has a phase difference between the two eccentric mechanisms, so the rolling shear is performed on the straight upper blade from bottom to top, because the overlap of the blades does not change in the entire cutting range , so the sheared plate is almost not bent, and the opening of this kind of shearing machine is larger than that of the inclined blade shearing machine, and the total stroke is 30%-40% smaller, so the transmission eccentricity is small, and the transmission torque is correspondingly smaller , In addition, there is only a small relative movement between the arc lower edge of this kind of shearing machine and the sheared plate, that is, the blade overlap is small, the blade wear is small, and it is conducive to bla...

AI Technical Summary

Problems solved by technology

[0003] In the traditional rolling shearing machine, since the two eccentric mechanisms turn in the same direction, the lateral force exerted by each eccentric mechanism on the tool holder cannot be offset, and the tool holder bears the sum of the lateral forces generated by the two eccentric mechanisms; the traditional Because the phase difference between the two eccentric mechanisms is a fixed value that cannot be adjusted, the cutting angle of the blade (that is, the shearing angle) is constant and cannot be adjusted when cutting the plate, and cannot meet the optimum requirements for plates with different thicknesses. The need for the best cutting effect; in the traditional rolling shears, the movement track of the lower knife rest is a curve, and the guide mechanism of the lower knife rest cannot use ordinary rollers, only sliding friction, so the mechanism wears seriously and the service life is short ;The traditional rolling shearing machine can only use a separate pressing mechanism due to the non-linear movement of the lower knife rest, which takes a long time to respond and cannot be synchronized with the shearing action, which seriously affects production efficiency

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