Self-centering device of thick-film resistor disc for automatic feeding and discharging of laser resistor trimming machine

Abstract

The invention belongs to the technical field of self-centering of automatic feeding and discharging in the thick-film resistor disc resistor adjusting process, and discloses a self-centering device ofa thick-film resistor disc for automatic feeding and discharging of a laser resistor adjusting machine. A four-claw air cylinder is fixedly arranged in the middle of a bottom plate and fixedly connected with the bottom plate; the self-centering device is symmetrically arranged around the periphery of the four-claw cylinder in a cross shape; side connecting plates are fixedly arranged in the periphery of the four-claw air cylinder and the periphery of the self-centering device, the lower portions of the side connecting plates are fixedly connected with the bottom plate, and the upper portionsof the side connecting plates are fixedly connected with the bottom of a centering plate; the centering plate sleeves the upper parts of the four-claw cylinder and the self-centering device; and the thick-film resistor disc is placed it the upper part of the four-claw cylinder. According to the thick-film resistor disc automatic positioning device, the accuracy of thick-film resistor disc automatic positioning is greatly improved, the accuracy of automatic grabbing of the thick-film resistor disc by an automatic manipulator suction cup is improved, and deformation of the thick-film resistor disc in the resistance adjusting process is prevented.

Description

technical field [0001] The invention belongs to the technical field of self-centering for automatic loading and unloading during the resistance adjustment process of thick-film resistance sheets, and in particular relates to a self-centering device for thick-film resistance sheets for automatic loading and unloading of laser resistance adjustment machines. Background technique [0002] Laser trimming machine is mainly used in the resistance adjustment of thick film and thin film resistors. The principle of laser resistance trimming is to use a very thin laser beam to hit the thick and thin film resistors, and realize the cutting of thick and thin film circuits by vaporizing and evaporating the resistors. The laser beam cuts the thick and thin film resistors according to the predetermined program of the computer, and the resistance value of the resistor is changed by changing the geometric shape of the thick and thin film resistors. As the laser cutting process progresses, t...

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Problems solved by technology

[0004] In order to solve the above technical problems, the present invention provides a self-centering device for thick-film resistors used for automatic loading and unloading of laser resistor trimming machines. Its design structure is simple, scientific and reasonable, and it is easy to operate. Heart; the present invention can solve the problem of increasing the friction coefficient by adding cylinders on both sides of the vacuum table in the prior art to push the resistance sheet to the right-angle table for positioning, causing one side of the thick film resistance sheet to arrive, and the other side does not arrive. It cannot be moved, so that the pressure of the thick film resistor is too large, which may easily cause the deformation of the film, and the pressure is small, and it is easy to push the problem.

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