Pressure self-adaptive switching hydraulic logic control device for main and auxiliary hydraulic cylinders

Abstract

The invention discloses a pressure self-adaptive switching hydraulic logic control device for main and auxiliary hydraulic cylinders. The pressure self-adaptive switching hydraulic logic control device comprises the main cylinder and the auxiliary cylinder, wherein the main cylinder and the auxiliary cylinder are parallelly and rigidly connected on a load, a first electromagnetic directional valve is connected to the main cylinder, a pressure regulating valve, a throttling valve and a second electromagnetic directional valve are sequentially connected to the auxiliary cylinder, a first logic valve and a second logic valve are respectively connected between the pressure regulating valve and the auxiliary cylinder, and the first logic valve is connected between the main cylinder and the first electromagnetic directional valve. The pressure self-adaptive switching hydraulic logic control device can completely achieve functions achieved in an existing control mode, the links easily causing faults are decreased, the problems including slippage and the like occurred in quiver, switching impact and a static state are eliminated by relying on the intrinsic rapidity, sensitivity and reliability of pressure self-adaption, and the main and auxiliary hydraulic cylinders are smoother to switch and greatly meet the working condition requirements of the pressure self-adaptive switching hydraulic logic control device.

Description

technical field [0001] The invention relates to the technical field of forging, in particular to a hydraulic logic control device for pressure self-adaptive switching of main and auxiliary hydraulic cylinders. Background technique [0002] At present, in the forming and forging industry, due to the requirements of technology and cost, a large number of main and auxiliary hydraulic cylinders coexist in many mechanisms. The cylinder is the master cylinder, and the master cylinder is the slave cylinder), such as figure 1 As shown, it is a schematic diagram of the existing control method. When working, the master cylinder works with the auxiliary cylinder at a slow speed (in this state, the master cylinder is the active cylinder, and the auxiliary cylinder is the slave cylinder); this can greatly reduce the hydraulic pressure. The system configuration cost is low, so it is widely used. In order to realize this process, the existing control method is the master, and the auxilia...

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Problems solved by technology

In order to realize this process, the existing control method is the master, and the auxiliary cylinder is controlled separately. During the operation, a travel switch or other displacement detection means are set to send signals to participate in the control of the master and auxiliary cylinders. 1. In well-maintained occasions, this control method is widely used. For occasions with complex working conditions and harsh environments, this control method is not very effective, and unexpected problems will occur, such as: tremor, switching shock, and slippage when stationary. Misoperation of the electromagnet may also produce destructive results in severe cases

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