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Functional requirements for the connection between the tool holder and the hydraulic cylinder of the hydraulic gate shearing machine

by:WORLD     2022-08-06

Regarding the connection between the tool holder and the hydraulic cylinder of the hydraulic gate shearing machine, I don't know if you have any knowledge. In fact, the connection between the tool holder and the hydraulic cylinder needs to meet certain functional requirements, so I will give you the details today. Let me tell you, I hope it can help you.


Hydraulic guillotine shearing machine belongs to a kind of oblique blade shearing machine. It is driven by hydraulic cylinder, and adopts reasonable blade clearance and shearing angle by means of moving upper blade and fixed lower blade. The shearing force applied to the sheet metal causes the sheet to break apart according to the required size.


The connection between the tool holder and the hydraulic cylinder on the hydraulic gate shearing machine generally adopts a flexible connection, and its main function is to meet the direct transmission of shear force and the adjustment of blade gap and shear angle. There are two types of connection between the tool rest and the hydraulic cylinder of the existing hydraulic gate shearing machine: boom bolt and butterfly spring connection and fixed center distance connection plate connection. Neither of these two connections can meet the above functional requirements. Accidents caused by damage to connectors.

In this paper, an eccentric floating connection mechanism between the upper tool holder and the hydraulic cylinder of the hydraulic gate shearing machine is designed. The mechanism is simple and novel in structure, easy to install and adjust, and can maintain a fixed connection between the spherical head at the end of the piston rod of the hydraulic cylinder and the spherical base. There is a small gap to facilitate the adjustment of the blade gap, which can realize that the connecting rod is always in a vertical hanging state when adjusting the shearing angle, and can ensure that the shearing force directly acts on the upper tool holder during shearing, thereby eliminating the need for the connecting piece. The occurrence of major equipment accidents caused by damage is guaranteed.


The hydraulic gate shearing machine is mainly composed of a frame, an upper and lower knife frame, a hydraulic system, a pressing device, a back gauge device, a front support frame, and an electrical system. The front and rear of the upper tool rest are supported by three-point rolling guide rails, the lower part and the fixed lower tool rest blade maintain the blade gap and shearing angle, the upper part is connected with two hydraulic cylinders, and driven by the hydraulic cylinders, the up and down linear motion is completed to complete the shearing operation , to implement the cut function. In order to improve the shearing quality of the sheared plate, prolong the service life of the blade, and ensure the reliability of the shearing process, the connection between the tool holder and the hydraulic cylinder on the hydraulic gate shearing machine meets the following functional requirements.

(1) Meet the blade clearance adjustment requirements. The size of the blade gap of the hydraulic guillotine shearing machine directly affects the quality of plate shearing and the service life of the blade. Usually, if the blade clearance is too large, the burr on the shearing surface will be large, which will affect the cutting quality of the plate; on the contrary, if the blade clearance is too small, the blade will be worn out faster, which will affect the service life of the blade.


The value of the blade clearance depends on the material of the sheet to be sheared and the thickness of the sheet to be sheared. When cutting sheets of different materials and thicknesses, the blade clearance needs to be adjusted. After the hydraulic guillotine shears are used for a long time , the blade clearance also needs to be adjusted.


(2) To meet the shear angle adjustment requirements. The size of the shear angle of the hydraulic gate shearing machine directly affects the quality of the plate shearing and the size of the shearing force. Generally, increasing the shear angle can reduce shear burrs and reduce the shear force, but may produce larger deformation when cutting narrow strips; reduce the shear angle, the deformation can be reduced, but burrs may be generated.


Therefore, in order to obtain a good shearing effect, it is necessary to adjust the shearing angle to achieve a suitable shearing angle when shearing plates of different materials and thicknesses, or in different application occasions.


(3) To meet the requirements of direct transmission of shear force. The shearing drive mechanism of the hydraulic gate shearing machine is a hydraulic cylinder, the shearing actuator is an upper tool rest, and the hydraulic cylinder and the upper tool rest are connected by a connecting mechanism. When shearing, the shearing force is very large. If the shearing force is transmitted to the upper tool holder through the connecting mechanism, the connecting mechanism must have sufficient strength, otherwise it will cause damage and cause accidents, so the connecting mechanism will be very bulky.


Therefore, the design requires that the upper tool rest connecting mechanism has the function of directly transmitting the shear force from the hydraulic cylinder to the upper tool rest during shearing, and the connecting mechanism drives the upper tool rest to reset during the return stroke, so that the connecting mechanism only needs to carry the upper tool rest. weight to ensure the reliability of the cutting process.



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