Work Principle of Hydraulic Guillotine Shear

Working Principle and Structure
The guillotine shear is commonly used to cut sheet metals with straight edges. Its cutting process should ensure a good linearity and parallelism of the cutting surface while avoiding warp so as to get the high-quality workpiece.

1. Work Principle
The top knife is inserted into the knife carrier while the bottom blade is fixed to the shear table. On the table are installed with roller bearings through which sheet metals can be conveniently moved and fed into the shear. The drop-off gauge, also called drop-off bar, is responsible for precise positioning of the material so that the portion to be cut is the required size. The position of the back gauge is adjusted via the positioning pin. Hydraulic hold-down cylinder clamps the material tightly to prevent it turning over in the shearing process. The safety shield protects operators from operating accidents.

Adjustment of the Front Stop
In this process, the back stop is moved close to the bottom blade. After that, slide the angle bar of the back stop against the sample plate. Then push the angle bar of the front stop close to the sample plate and tighten the bar. Loosen the screw on the back stop, remove the sample plate, and load metal plate for cutting and shearing.

Adjustment of the Back Stop
Make the sample plate align with the bottom blade. Then slide the angle bar of the back stop against the plate and tighten the bar. Remove the sample plate and load metal plate for cutting and shearing.

Adjustment of the Angle Stop
Put the sample plate on the shear table and make it align with the bottom blade. Set the position of the angle stop, then tighten it. Adjust the back stop according to the position of the sample plate. In the actual cutting process, users can use both the angle stop and back stop to perform positioning.

2. Structure
Gantry Type Guillotine Shear

The gantry type guillotine shear is a commonly used mechanical device. It has no throat, therefore only can be used to cut metal plate whose length is shorter than that of the blade. The blade tilts at a slight angle and features exceptional rigidity, high stroke rate, and large cutting pressure on the plate. Therefore, it is able to accomplish various precision cutting applications. The gantry beam contains two lower wall panels connected via the connecting rod and fixed axles. The panel is installed with 7 roller axles. On each axle, there are gears that can be meshed with the gears on the roller axle of the upper beam. The reduction gear and axle are fitted to the bottom of the lower beam, where the 6 transmission gears are in mesh with 7 gears on the lower roller shaft. The lower beam is fixed to the middle of the rack by the bolts. The position of the upper and lower beam is adjusted via the positioning pin so that upper beam can move relative to the lower beam along the pin in order to adjust the clearance between the upper and lower rollers. The rolling pressure is adjusted via the screw.

Structure of the Single Plain Seam Forming Machine
The YZD3-16 series single plain seam forming machine is mainly constructed of the rack, core parts, motor, work surface, guide ruler, and safety shield. The rack section is welded of steel profile onto which the motor, core parts, guide ruler, and safety shield are mounted. The core parts consist of the upper and lower beam with the positioning pin and adjusting screw rod. There are two wall panels connected via the beam connecting rod. 7 roller axles are installed on the wall panel. On each roller axle, there is the middle roller, outer roller, and the gear.

Application of the Single Plain Seam Forming Machine
The single plain seam forming machine can be used in many seam forming applications, such as to form the seam on the sheet metal duct, which allows ease of assembly on the job site as well as saves manual labor and improves production efficiency. The air duct processed by our seam forming machine features high strength, little deformation, smooth surface, consistent size, and attractive design.

Work Principle
Through the roll bending or roll forming process, the sheet metal edge is bent to form a cross-sectional shape of curved hook that is needed for seam connection.

There are various types of seam forming machine. In this chapter, we mainly focus on the structure, work principle, and application of the single plain seam forming machine, button punch snap lock former, angle joint seam forming machine, elbow notching machine, and strip forming machine. Other shearing machine includes the bending machine, NC bending machine, four column hydraulic press, shearing blade, tool and die, hydraulic shearing machine, cold bending machine, frame cold bender, and the guillotine shear.