Self-adaption floatation pressure device for spot welding machine

Abstract

The invention discloses a self-adaption floatation pressure device for a spot welding machine. The self-adaption floatation pressure device comprises a frame, a pressure mechanism, an upper electrode, a lower electrode and a floatation balance mechanism. The frame comprises a vertical stand, and an upper bracket and a lower bracket which are connected with upper and lower ends of the vertical stand, thereby forming a C-shaped structure, vertical guiderails are respectively arranged at the left side and the right side of the vertical stand, and sliders are oppositely sheathed on the upper parts and the lower parts of the two guiderails respectively in a sliding manner; the pressure mechanism is arranged on the upper bracket of the frame; the upper electrode is arranged at the lower end of the pressure mechanism so as to do up-down movement along with the pressure mechanism; the lower electrode and the upper electrode are coaxially arranged on the lower bracket of the frame; the floatation balance mechanism is positioned at the lower part of the self-adaption floatation pressure device and comprises a support spring and a lower cylinder, wherein the upper end of the support spring is connected with the lower bracket of the frame, and a piston rod of the lower cylinder is connected with the lower bracket of the frame, and the four sliders on the two guiderails, the lower end of the support spring and the bottom surface of the lower cylinder are respectively fixed on the spot welding machine.

Description

technical field [0001] The invention relates to a spot welding connection device for large thick plate members, in particular to an adaptive floating pressure device used on a spot welding machine. Background technique [0002] The traditional fixed spot welding machine is often fixed by the lower electrode, and the workpiece is clamped and then welded by pressing the upper electrode down through the pressure device. This pressurizing device is generally suitable for the manufacture of stamped and rolled thin plate members that can be overlapped, the joints do not require airtightness, and the thickness is less than 3mm. For large thick plate members, the workpiece must be fixed before spot welding. Due to the high deformation resistance of the thick plate workpiece, when the workpiece is deformed or the electrode tip is worn, it is difficult to ensure that the lower electrode presses the workpiece to cause welding defects. Contents of the invention [0003] The purpose o...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the defects of the prior art and provide an adaptive floating pressurization device used on spot welding machines, which solves the problem that the lower electrodes cannot be adaptively pressed when traditional spot welding machines weld large thick plate components The problem of the workpiece, the whole device is flexible and adjustable, which greatly improves the production efficiency while ensuring the welding quality

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