In the process of lifting and moving the beam plate of the hydraulic press to drive the mold to complete the product forming process, it is very easy for the operator to be crushed by the beam plate and even become disabled. The safety protection device equipped with the anti-pressure hand is the best way for the enterprise to prevent personal accidents in the hydraulic press necessary measures.
Active evacuation
In common safety protection devices, except for the two-hand operation type, people's wrists are passively pushed away from the dangerous area. Whether they can be evacuated in time depends entirely on whether the safety device is operating normally. During normal operation, if the operator is not paying attention, the mechanical wrist cord buckle, swing lever, etc. will also bring other forms of injury to the operator. Therefore, the anti-pressure hand safety device of the hydraulic press adopts a two-handed operation mode, and the normal descent of the brake beam is controlled by pulling the operating lever to connect the circuit, so as to realize the active evacuation of the human body.
Force block
The two-hand control safety device can prevent the abnormal drop of the moving beam plate by controlling the on-off of the circuit, but in the case of electrical components failure, there is no mechanism to forcibly prevent the moving beam plate from falling, and it still cannot guarantee long-term safe and reliable operation. . The anti-pressure hand safety device of the hydraulic press machine is equipped with a pillar-type mechanical support under the moving beam plate to ensure that the hydraulic machine can strongly prevent the moving beam plate from falling down abnormally in the whole process when the mechanical and electrical control components of the anti-pressure hand device fail, so that the upper and lower molds cannot be completely closed. Close up to leave enough safety space for the operator.
Power steering
In order to realize the forced prevention of active evacuation and abnormal descent of the human body, the operating part of the anti-pressure hand safety device must be a manual mechanical structure, which requires the operator to apply sufficient operating force to complete the operation and control of the hydraulic motorized beam. Long hours of high-intensity labor can easily lead to fatigue and reduce production efficiency. The device adopts a spring or mechanical counterweight balance structure, and realizes power-assisted and convenient operation under the premise of ensuring the automatic reset of the operating parts.
The structure of the anti-pressure hand safety device of the hydraulic press consists of a bottom plate, a base, a slider, a support column, a wall panel, a pull rod, an upper plate, a bead, a spring (the safety protection device of a large hydraulic press adopts a counterweight balance mechanism), front and rear positioning rods, front and rear support plates and Travel switch and other components.
The slider can slide back and forth in the slideway surrounded by the upper table, wall panels, and beading. The slider in the initial state will cover the channel of the supporting column in the base under the action of the spring or the counterweight balance mechanism, and the moving beam plate will The fixedly connected supporting column cannot move downward through the channel, thereby forcibly preventing the abnormal full-range descent of the movable beam slab. When the operator pulls the pull rod to drive the slider to move, the channel in the base is opened, and the support column can freely go up and down through the channel to ensure the normal use of the hydraulic machine.
A travel switch for controlling the on-off of the hydraulic valve is installed on the position where the upper plate is directly facing the front of the slide block. The slide block is connected with a manual pull rod, and the pull rod is covered with a return spring. In the initial state, the travel switch is disengaged, and the control circuit is in a cut-off state. The operator pulls the pull rod outward, drives the slider forward and presses the stroke control switch, the oil supply solenoid valve pressed down by the hydraulic press is connected, and the moving beam plate descends.
The anti-pressure hand safety device of the hydraulic press is designed with front and rear positioning rods made of screw rods. Turn the screw rods to adjust the extension length of the positioning rods and control the movement range of the slider to ensure that the slider can completely cover the lifting channel of the support column in the base when it is reset. Make the force of touching and pressing the travel switch suitable when tightening, and realize the normal operation of the solenoid valve control circuit of the hydraulic machine.
The anti-pressure hand safety device of the hydraulic press machine, through the mechanical linkage of two sets of safety devices and the series linkage with the control circuit, restrains the operator's two-handed movement. Only when the safety device is pulled by both hands, can the solenoid valve be connected to drive the hydraulic motorized beam. Pressing down realizes the purpose of manually evacuating from the dangerous area; the use of the mechanical support of the support column and the linkage between the travel switch and the safety device prevents the possibility of the operator suddenly pressing down when the operator performs loading operations in the dangerous area It realizes the long-term safe and reliable operation of the hydraulic press.
- Hydraulic Press
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