Press machine intelligent overload protection device and control method

Abstract

The invention discloses a press machine intelligent overload protection device and a control method. The press machine intelligent overload protection device is mainly composed of a detecting part, amechanical executing part, a control part and a feedback part. When a press machine is overloaded, a force sensor transmits a signal to a system controller of the whole machine, the controller enablesthe press machine to stop working and enables a coil winding to be powered off, constraint of magnetorheological fluid from a magnetic field is removed, and the fluidity of the magnetorheological fluid is improved; under the pressure of a spherical support, the magnetorheological fluid passes through a throttling hole and a designed gap to enter an upper cavity, the spherical support and a connecting rod linkage ball fall, and the damage to the press machine due to overloaded blocking run is avoided; and after a crank sliding block mechanism breaks away from a dead area and exits out of the overloaded state, when a stroke switch detects that the spherical support recovers to an original height under the effects of a spring and the self-weight, the coil winding is powered on, a press machine sliding block is adjusted to an upper dead point, the press machine recovers to a normal state, and thus overloaded protection to the press machine is achieved.

Description

technical field

[0001] The invention belongs to the technical field of forging machinery, in particular to an intelligent overload protection device and a control method for a crank press. Background technique

[0002] The press occupies a pivotal position in the mechanical processing industry. It has the characteristics of wide application and high production efficiency. The press can be widely used in cutting, punching, blanking, bending and forming processes. By exerting strong pressure on the metal blank To plastically deform metals into useful parts. Crank presses often face overload problems in the actual production process, which will cause damage to the press, especially for large presses, causing more serious losses. Most of the existing presses on the market use mechanical and hydraulic overload protection devices. For mechanical overload protection devices, it is difficult to ensure that the overload protection device is safe because the shear strength of the col...

Images