A line drawing machine fixture

Abstract

The invention discloses a line drawing machine fixture, and relates to the field of gas discharge tube processing equipment, in particular to a porcelain tube automatic line drawing fixture for a gas discharge tube. The fixture comprises a clamping device and a rotating device, wherein the clamping device comprises a left clamping jaw, a right clamping jaw, a left split swing rod, a right split swing rod, a split rotary rod, a left tube clamping moving block, a right tube clamping moving block, a clamping linear guide rail, a left slide block and a right slide block; the rotating device comprises a rotating plate and an involute rotating shaft. The fixture is suitable for clamping and positioning of porcelain tubes of different specifications, the porcelain tubes can be automatically obtained from a feed port, clamped and accurately displaced to a line drawing position, and overlapping of a carbon lead needle tip and the centers of the porcelain tubes and accurate positioning are guaranteed; after line drawing is finished, the porcelain tubes are automatically and separately put in a finished product box and a waste box according to line drawing effects; the fixture is used for assisting a line drawing mechanism in finishing automatic picking, line drawing and unloading processes, the line drawing precision, the degree of automation and the production efficiency of the porcelain tubes are improved, and the production cost is reduced.

Description

technical field [0001] The invention relates to the field of gas discharge tube processing equipment, in particular to an automatic line-drawing jig for porcelain tubes used for gas discharge tubes. Background technique [0002] The gas discharge tube is a switch-type protection device, which is often used in the first or first two stages of a multi-level protection circuit to discharge lightning transient overcurrent and limit overvoltage. It adopts a ceramic hermetic package, and the interior is composed of two or several metal electrodes with gaps, filled with inert gas (argon or neon). When the voltage applied to the two electrode terminals reaches the breakdown of the gas in the gas discharge tube, the gas discharge tube starts to discharge, changing from high impedance to low impedance, so that the surge voltage is quickly short-circuited to close to zero voltage, and the overcurrent is released. Into the ground, so as to protect the subsequent circuit. When the surg...

AI Technical Summary

Problems solved by technology

[0005] In the process of drawing the carbon line, in order to maintain the uniformity of the force on the carbon lead and the wall of the porcelain tube, a fixture is required to clamp the porcelain tube and ensure that the carbon lead needle tip coincides with the center of the porcelain tube at zero position, otherwise, it is difficult to ensure the length of the carbon line And the uniformity of distribution, and it is easy to lead to the occurrence of dotted lines and broken lead

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