The machine is mainly composed of frame, tool holder, rear stop, rear material supporting, hydraulic system, material pressing device and electrical system.
The steel plate welding structure is adopted, and the left and right wall panels, workbench, pressing beam and cross beam are welded into a frame structure, which has good rigidity.
The left and right oil cylinders are respectively installed on the supports on the left and right wall panels and the upper part of the pressing beam, and the lower blade is fixed on the workbench.
The left side of the workbench is equipped with a lateral material retaining mechanism (with a front material retaining mechanism), the stop is positioned and counted with a ruler.
The perpendicularity between the lateral stop and the lower knife edge can be adjusted by the set screw under the support arm.
Tool holder #
The tool holder body is a welded assembly with sufficient rigidity.
The three fulcrum roller guide rail is used to support the tool holder, which is connected to the piston rod of the oil cylinder and makes reciprocating linear motion between the guide rails.
The rear two fulcrums are fixed on the wallboard, and the front fulcrum is the disc spring roller support, which is fixed on the pressing beam to make the tool holder always fit on the rear two fulcrums.
The blade gap adjustment mechanism drives the synchronous shaft for the worm gear reducer to drive the eccentric rotation of the upper fulcrum, so that the tool holder rotates slightly on the lower fulcrum, so as to change the blade gap value.
Rear stop #
The rear stopper is installed on the bottom plate of the tool holder and moves up and down with the tool holder.
The rear stopper is driven by the servo motor and driven by the synchronous belt and ball screw pair to drive the stopper frame to move back and forth on the linear guide rail.
The whole material retaining device is counted by the numerical control system, with accurate and reliable positioning and convenient operation. The adjustment range of rear retaining material is 10 ~ 1050mm.
Note: when pushing the sheet to the retaining plate during positioning, lean lightly against the retaining plate to ensure the positioning accuracy, otherwise it will affect its positioning accuracy.
Rear support #
The rear support is installed at the back of the rack workbench, which mainly plays an auxiliary positioning role to prevent the plate from sagging and causing the plate size error.
The rear support is mainly composed of air cylinder, synchronous shaft and support arm.
Before shearing, the support arm rises, after positioning, the support arm turns over and falls down, and the sheared sheet material slides down along the surface of the shield.
Rear support range: the width of the sheared plate is 500 ~ 3050mm and the length is 350 ~ 1050mm.
Hydraulic system #
The hydraulic system is installed on the support at the rear of the frame and is mainly composed of main motor, oil pump, valve stack and oil tank.
Bosch-rexboth integrated hydraulic valve stack is adopted to enhance the stability and reliability of the hydraulic system.
American EMB high pressure hose assembly and ferrule joint are adopted to improve the cleanliness of hydraulic oil.
Pressing device #
The material pressing device is mainly composed of a group of material pressing cylinders installed on the material pressing beam of the frame.
After the oil is fed into the pressing cylinder, it acts on the plunger rod to make it move downward against the spring force and compress the sheet metal.
After shearing, the plunger rod is reset by spring force.
The pressing force increases with the increase of the thickness of the sheared sheet.
The pressing force of the machine tool is set to three gears 0, I and II from small to large. The user can adjust it according to the actual situation of the material and thickness of the sheared sheet.
When cutting the long and narrow sheet with the maximum plate thickness, the pressing force shall be adjusted to the maximum, and at least 2-3 pressing cylinders shall press the sheet before cutting.
A fixed protective fence is set in front of the pressing cylinder to ensure that the operator’s fingers will not extend into the knife edge when operating the machine.
Electrical system #
The electrical system adopts the special CNC system for the Dac360 plate shearing machine of Delem company in the Netherlands.
The numerical control system and all operation buttons are installed on the electrical cabinet on the left wall panel, and a footswitch is set.