Stroke detection device for pressing machine

Abstract

The invention provides a stroke detection device for a pressing machine, belongs to the field of stroke detection, and can be used for solving the problems of the prior art that the structure is complex, the detection scope is limited and the prior art is not suitable for the stroke detection of a pressing machine with large shaking amplitude. The device comprises a sensor device and a magnetic positioning device which are respectively fixed on a moveable part and a fixed part of the pressing machine; the sensor device comprises an output cable (1), a displacement sensor head (2), a connecting plate (3) and a displacement sensor rod (10); and the main part of the magnetic positioning device is a magnetic ring (7). When the pressing machine works, the relative displacement occurs between the displacement sensor rod of the sensor device and the magnetic ring of the magnetic positioning device, a generated induction signal is output by a cable, and the stroke is displayed and controlled. The device has a simple structure, is easily mounted, is conveniently maintained, can endure the maximum shaking amplitude of 10-20mm of the pressing machine, and is suitable for various forging pressing machines. The stroke from dozens of millimeters to five meters can be accurately detected and controlled.

Description

technical field [0001] The invention relates to a stroke detection device, in particular to a stroke detection device suitable for forging presses. Background technique [0002] In the press, in order to accurately control the stroke of the press, it is necessary to detect the stroke of the press. Whether it is an upper transmission press or a lower transmission press, the structure of the stroke detection device built into the oil cylinder is commonly used, that is The sensor is installed inside the hydraulic cylinder. The disadvantage of this structure is that the structure of the cylinder is complicated, the processing is difficult, it is not easy to install, and it is not easy to maintain; the general structure of the external non-contact stroke detection device is that the displacement sensor is connected to the press through the bracket. The fixed part of the positioning magnet is installed on the movable part of the press. When the positioning magnet and the sensor pr...

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