Clamping device and method for controlling clamping force on workpiece through linear motor

Abstract

The invention discloses a clamping device and method for controlling the clamping force on a workpiece through a linear motor. The clamping device comprises a base, the linear motor, a telescopic rod, a control unit, a transmission mechanism and a clamping jaw mechanism; the clamping jaw mechanism comprises friction force sensing jaws and mechanical clamping jaws, and friction force sensors are arranged on the contact faces of the friction force sensing jaws and the workpiece; the linear motor is connected with the telescopic rod; and the control unit sends an electric signal, the linear motor drives the telescopic rod to move, and then the transmission mechanism is driven to control opening and closing of the clamping jaw mechanism. According to the clamping device, the friction force sensing jaws are in contact with the workpiece, so that the friction force sensors sense vertical friction force generated when the workpiece is in contact with the friction force sensing jaws; and the friction force sensors process and judge the vertical friction force and feeds back the vertical friction force to a CPU, the CPU controls a driving signal of the linear motor and enables the clamping device to provide clamping force according to the friction force generated by relative sliding between the contact faces of the mechanical clamping jaws and the workpiece, and accurate control over the clamping force is achieved.

Description

technical field [0001] The invention relates to a mechanical clamping device, in particular to a clamping device and a method for controlling the clamping force of a workpiece by a linear motor. Background technique [0002] A mechanical claw is a mechanical component that can achieve functions similar to a human hand. The mechanical claw is an automatic device with the function of grabbing and moving workpieces used in the automated production process. It is a new type of device developed in the mechanized and automated production process. [0003] At present, mechanical claws are more and more widely used. In the machinery production industry, it can be used for component assembly, handling, loading and unloading of processed workpieces, and thus saves huge workpiece transportation devices. It has a compact structure and strong adaptability. [0004] The widely used driving method of mechanical claw is to drive the worm and gear to rotate by the rotating motor to open and...

AI Technical Summary

Problems solved by technology

[0004] The widely used driving method of mechanical claws is to drive the worm and gears to rotate by a rotating motor to open and close the mechanical claws, and the structure is complex.

However, due to the small operating speed of the small rotating motor, the opening and closing response of the mechanical claw is slow

It is difficult to control the clamping force of the mechanical claw during use, resulting in inaccurate clamping force

And when the mechanical claw clamps the workpiece and cannot move, the rotating motor continues to run idling, and the motor is easily damaged due to overload, which affects the efficiency and reliability of the mechanical claw

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