Plate shearing machine

Abstract

The invention discloses a plate shearing machine. The plate shearing machine comprises a machine frame and a sliding block which is arranged on the machine frame through a linear guide track pair, wherein a lower shear and an upper shear are fixed on the machine frame and the sliding block respectively; nuts and screw rods are arranged above the sliding block; the top parts of the screw rods are provided with bevel gear steering boxes; and the bevel gear sheering boxes are connected with one another through coupling shafts and are driven by a same servo motor. The servo motor can synchronously drive each bevel gear steering box to rotate through the coupling shafts, and the bevel gear steering boxes drive each screw rod to rotate synchronously to ensure that the whole sliding block can move up and down synchronously. The sliding block carries the upper shear to move to realize the shearing of a workpiece. Because the rotational angle of the servo motor can be accurately controlled, the rotational angle of the screw rods can be accurately controlled, and the distance for the sliding block to move up and down can be accurately controlled. By controlling the distance for the sliding block to move up and down, the shearing stroke of the plate shearing machine is controlled. Therefore, the shearing stroke of the plate shearing machine can be accurately controlled, and the middle part of a plate can be sheared.

Description

technical field [0001] The invention relates to mechanical equipment for cutting sheet metal parts, in particular to a shearing machine. Background technique [0002] The refrigerators used in supermarkets and stores to display ice cream and chilled goods waiting for sale are usually horizontal refrigerators. The metal shell of the horizontal refrigerator is composed of a flat back panel and a C-shaped hoard made of bent metal sheets, such as figure 1 , figure 2 . In order to facilitate customers to watch the goods in the cabinet, the top surface of the horizontal freezer is usually designed to be arc-shaped, the middle of the top surface of the C-shaped enclosure is a straight line, and the two sides are upward arcs; used to bend the C-shaped enclosure The workpiece (metal sheet) needs to be a structure with convex arcs on the left and right sides and a straight line concave in the middle, such as image 3 . At present, the metal sheet of this structure is usually form...

AI Technical Summary

Problems solved by technology

[0004] However, the plate shearing machine used in the above method needs to cut the middle of the sheet material. If the shearing stroke is too small, the remaining material in the middle cannot be cut off, and if the shearing stroke is too large, the arc parts on both sides will be damaged. Therefore, it requires that the shear stroke can be precisely controlled

However, the shearing stroke of the current existing shearing machine is controlled by the oil cylinder and the travel switch, and the control accuracy is not high. Usually, it can only shear the entire sheet or one end of the sheet, which cannot meet the requirements of use.

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