Novel hydraulic clamp oil source

Abstract

The invention discloses a novel hydraulic clamp oil source. According to the hydraulic clamp oil source, an oil groove is formed in the bottom, and hydraulic oil is stored in the oil groove; a quick feeding cylinder and work feeding cylinders are installed on the oil groove; a connecting plate is arranged above the quick feeding cylinder and the work feeding cylinders, a plurality of connecting holes are formed in the connecting plate, and the connecting holes are connected with the top end of a piston of the quick feeding cylinder and the top ends of the pistons of the work feeding oil cylinders; a servo motor is connected with a speed reducer; an output shaft of the speed reducer is connected with one end of a lead screw; and a screw nut on the lead screw is connected with the connectingplate. The novel hydraulic clamp oil source has the beneficial effects that the confluence of the hydraulic oil is controlled through the arrangement of reversing valves, the maximum flow required bythe quick feeding cylinder and the pressure required by the work feeding cylinders can be obtained, and the pressure requirement for tight clamping of a clamp can be met; the servo motor controls thepistons to ascend and descend to supply pressure and oil, spill-over and cooling are not needed, energy conservation and environmental protection are achieved, the service life of the hydraulic oil can be prolonged, and the oil supply driving mode of the lead screw and the oil cylinders greatly reduces the noise influence; and a pressure sensor can feed back the real-time pressure, and differentpressure output can be controlled through a motion controller.

Description

Technical field: [0001] The invention relates to a hydraulic clamp oil source, in particular to a hydraulic clamp oil source capable of closed-loop control of speed and pressure. Background technique: [0002] Tensile test refers to the test method for measuring the properties of materials under axial tensile load. When the test material is subjected to tensile test, it often needs to be clamped by clamps. Slipping, or the clamping force is too large to damage the sample, so the requirements for the fixture are more stringent. Among various fixtures, hydraulic fixture clamping can effectively solve the above problems. The hydraulic clamp can ensure the firm clamping of the test piece, however, there are still the following problems to be solved urgently in the clamping process of the hydraulic clamp: [0003] (1) The working condition of the hydraulic fixture in the tensile testing machine is that it needs to be fast when clamping and loosening, so it needs a large flow in...

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Problems solved by technology

[0003] (1) The working condition of the hydraulic fixture in the tensile testing machine is that it needs to be fast when clamping and loosening, so it needs a large flow instead of high pressure; when the fixture is in the clamped state for testing The cylinder of the hydraulic clamp hardly moves, and only requires a large clamping force and high pressure, so only a small flow is required; the oil source of the ordinary hydraulic clamp adopts a common motor to drive the hydraulic pump, which can only output a fixed pressure and flow , so it will cause a large amount of high-pressure oil to be diverted through the relief valve under the clamping high-pressure state, resulting in huge energy loss, and may even fail to reach the required high pressure and flow, which seriously affects the test efficiency and the accuracy of the results;

[0004] (2) An ordinary motor is used to drive the hydraulic pump, resulting in a large amount of high-pressure oil that needs to be diverted through the overflow valve, and the energy leakage causes serious heating problems. However, the conventional hydraulic station has overflow and heat during pressure maintenance, and usually requires air cooling or The way of water cooling not only increases the complexity of the system, but also reduces the service life of hydraulic oil and waste of energy;

[0005] (3) The hydraulic pump is driven by an ordinary motor, which will generate a lot of noise during work, which will bring trouble to the operator

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