Electric screw press and limit method thereof

Abstract

The invention discloses an electric screw press and a limit method thereof. A motor of the electric screw press is connected with a flywheel through a transmission device; the flywheel is connected with a screw; the screw is connected with a sliding block by adopting screw threads; the screw and the sliding block extend into a frame and move up and down in the frame; the motor is a switched reluctance motor, and a position sensor is arranged on the switched reluctance motor and connected to a limit control functional module; and the frame is provided with a sliding block motion datum point. The limit method comprises the following steps of: counting position signals of the position sensor of the switched reluctance motor, calculating the current position of the sliding block according to the position counting value, comparing the current position with a required limit position to provide basis for the motion of the electric screw press, and setting a position counter when the sliding block reaches the datum point. The limit method realizes automatic adjustment of the limit position and enhances the reliability of a machine tool system by using the position signals of the switched reluctance motor to determine the limit position.

Description

technical field [0001] The invention relates to an electric screw press and a position limiting method thereof. Background technique [0002] The electric screw press is a new type of advanced press, which uses a reversible motor to continuously reversing the forward and reverse directions, driving the flywheel and the screw rod to rotate, and making the slider move up and down. Different from ordinary friction presses, electric screw presses have the advantages of high precision, adjustable strike capacity, high reliability, and low maintenance costs. [0003] figure 1 It is the mechanical schematic diagram of the electric screw press. The motor 1 is connected to the flywheel 2 through a belt or a gear, and the flywheel is connected to the screw 4. The screw and the slider 5 are connected by threads. When the screw rotates in one direction, the slider descends, that is, strikes. When the screw rotates in the other direction, it slides. The block goes up, that is, the ret...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the defects of uncertain slider stop position and component failure caused by the use of proximity switches or Hall switches as limit switches in existing electric screw presses, and provide an electric screw press and Its limit method, which uses the position signal of the switched reluctance motor to determine the limit position, so that the upper limit of the slider can be automatically adjusted without human participation, so that the stop position of the slider is within a relatively fixed range. Limit switches such as proximity switches or Hall switches are canceled, and motor position switches with higher reliability are used to enhance the reliability of the machine tool system

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