Safety type torsion shaft bending machine

Abstract

The invention relates to a safety type torsion shaft bending machine. An upper cavity of an oil cylinder of a sliding block is connected with an oil tank through a liquid supplementing valve. An outlet of an oil pump is connected with a P opening of a first electromagnetic reversing valve. An A opening of the first reversing valve is connected with the upper cavity of the oil cylinder of the sliding block. A B opening of the first reversing valve is connected with a liquid control opening of the liquid supplementing valve and a B opening of a third electromagnetic reversing valve. The B opening of the third reversing valve is connected with an inlet of an inserting valve through a first throttling opening. An outlet of the first throttling valve is connected with a lower cavity of the oil cylinder of the sliding block through a first one-way valve and a fifth throttling opening. An inlet of the inserting valve is connected with a P opening of the third reversing valve through a second throttling opening. An outlet of the inserting valve is connected with the lower cavity of the oil cylinder of the sliding block. The liquid control opening of the inserting valve is connected with an A opening of a fourth electromagnetic reversing valve. A P opening of the fourth electromagnetic reversing valve is connected with the outlet of the inserting valve. The outlet of the inserting valve is connected with an oil tank through a fourth throttling opening and a third pressure adjusting valve. The upper cavity of the oil cylinder of the sliding block is further connected with a B opening of a fifth electromagnetic reversing valve. T openings of all the reversing valves are connected with the oil tank. A hydraulic system of the bending machine is simple and clear, and action is safe and reliable.

Description

technical field [0001] The invention relates to a bending machine, in particular to a safe torsion shaft bending machine, which belongs to the technical field of bending machines. Background technique [0002] The bending machine is a general-purpose machine for bending sheet metal. It can bend various forms of workpieces according to needs. When equipped with corresponding equipment, it can also complete processes such as pipe bending, punching, bending and stretching. When bending sheets of different thicknesses and materials, the user only needs to select different molds and check the bending force table of the sheet, obtain the required bending force after calculation, and adjust to the corresponding working oil pressure to work. [0003] At present, the bending machine mainly consists of several categories of products such as hydraulic lower transmission type, hydraulic upper transmission type and hydraulic mechanical type. The synchronization of the side cylinders is ...

AI Technical Summary

Problems solved by technology

In addition, during the operation of the machine tool, there may be accidents such as valve jamming or control line falling off, which may easily cause the slide block to fall and cause accidental injury.

[0004] The existing bending machine has the following disadvantages: 1. The hydraulic system adopts an open-loop control method, and it is impossible to judge whether the valve core is in place and whether the pressure is overshoot

2. The electronic control does not adopt redundant control, all of which are in single-line control mode. When a certain contact is stuck and cannot be disconnected, it cannot effectively cut off the control circuit and stop the downward movement of the slider.

3. Dangerous parts, such as between the sliding block movement guide rail and the back gauge positioning device, are not effectively protected, which will cause personal injury

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