Hydraulic cylinder of numerical-control turret punch press

Abstract

The invention discloses a hydraulic cylinder of a numerical-control turret punch press and relates to a driving hydraulic cylinder for a pressing head of a high-speed numerical-control turret punch press. The hydraulic cylinder of the numerical-control turret punch press is simpler in structure and lower in energy consumption and can replace an imported like product on the premise that requirements on three working processes and high-frequency operation are met. The hydraulic cylinder comprises a cylinder body and a piston with multiple shoulders, the cylinder body consists of a feeding oil port, a fast forward oil port, a fast backward oil port, an oil return port and a boss arranged in the middle of the inner wall of the cylinder body, the piston consists of a piston body and a driving rod arranged at the lower end of the piston body, an upper shoulder is disposed on the outer edge of the top end surface of the piston body, and a lower shoulder is arranged on the outer edge of the bottom end surface of the piston body. A four-cavity structure is creatively provided in terms of the structure of the cylinder, and requirements on actions of three working processes can be met. In addition, overseas technical barriers in the field of high-speed numerical-control plate processing equipment are broken through, the current situation of overseas monopolization is also broken, and a national technical gap is filled.

Description

technical field [0001] The invention relates to a hydraulic cylinder of a high-speed numerically controlled stamping machine tool, in particular to a hydraulic cylinder for driving a stamping head of a high-speed numerically controlled turret punching machine. Background technique [0002] With the progress of the times, the development of science and technology, and the improvement of productivity, ordinary mechanical CNC turret punches are gradually replaced by hydraulic CNC turret punches due to their shortcomings such as slow punching speed and high noise. Due to the limitation of technical conditions and industrial level, the hydraulic system of domestic CNC turret punch press is difficult to meet the design requirements, and most manufacturers import the hydraulic system of CNC turret punch press from a famous German hydraulic company. [0003] The punch of the high-speed CNC turret punching machine is in the following actions: fast forward (empty, no load), work for...

AI Technical Summary

Problems solved by technology

[0011]1) The procurement cost is high; at present, the company’s product is in a monopoly position in the world, and the price is controlled by it, which makes the procurement cost expensive and eventually leads to the failure of the whole machine. Increased costs;

[0012]2), the oil circuit is complicated, and the failure rate is high; due to the use of three "power sources" of double pumps and accumulators, the three "power sources" The oil circuit needs to pass through several hydraulic components and the main cylinder to form a working circuit, which makes the whole oil circuit particularly complicated and has a high failure rate;

[0013]3) The oil return vibration is large, so a buffer needs to be installed; due to the use of a large flow pump, the return oil flow is large, and it is easy to generate large vibration during the return journey ;

[0014]4) Large flow rate requires the use of large-diameter valves; high-pressure pumps output high-pressure and small-flow hydraulic oil, and low-pressure pumps output low-pressure and large-flow hydraulic oil, requiring large-diameter hydraulic pipes The oil circuit can meet the needs of the oil circuit; and when the hydraulic pipeline has a large diameter, the corresponding equipment cost and occupied space are also high;

[0015]5), low energy efficiency; two pumps are used, which makes the overall operation consume a lot of energy and the energy efficiency conversion rate is low

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