Rotating welding electrode structure of pipe pile seam welder

Abstract

The invention relates to a pipe pile seam welder, in particular to a rotating welding electrode structure of the pipe pile seam welder. The rotating welding electrode structure comprises support plates, a conducting electrode plate, a welding electrode plate and a spring locating assembly. A pendulum shaft is assembled between the two corresponding support plates, the conducting electrode plate and the welding electrode plate which are assembled together through a locating sleeve are installed on a reinforcing plate, the reinforcing plate is fixedly connected to the pendulum shaft, one end of the reinforcing plate is hinged to a spring locating rod in the spring locating assembly, and a balance body is assembled at the other end of the reinforcing plate. The rotating welding electrode structure has the advantages that by additionally installing the balance body on a welding electrode, the gravity of the balance body and centrifugal force generated when the balance body works on the welding electrode are utilized to balance or offset the gravity or centrifugal force of the welding electrode through the pendulum shaft, so that the welding electrode can provide almost balanced welding pressure within a whole circumference range, complete conditions are provided for reducing welding pressure or welding current at the time, and accordingly energy conservation and consumption reduction are achieved indeed.

Description

technical field [0001] The invention relates to a pipe pile seam welder, in particular to a pipe pile seam welder rotary welding electrode structure. Background technique [0002] When the rotating welding electrode of the pipe pile welding machine is working, it makes a circular motion along the welding copper plate (fixed electrode), and welds together the longitudinal steel bars distributed on the circumference of the welding copper plate and the circumferential steel bars introduced by the bar guiding mechanism. The main problem of the current structure of the rotary welding electrode is that the electrode pressure changes greatly. The welding electrode pressure changes at different positions at any time during each welding cycle of the rotary welding electrode. When the welding point is at the highest point, the welding electrode pressure is the largest, such as figure 1 Shown; in the left and right horizontal position welding electrode pressure is medium, such as fig...

AI Technical Summary

Problems solved by technology

The main problem of the current structure of the rotary welding electrode is that the electrode pressure changes greatly. The welding electrode pressure changes at different positions at any time during each welding cycle of the rotary welding electrode. When the welding point is at the highest point, the welding electrode pressure is the largest, such as figure 1 Shown; in the left and right horizontal position welding electrode pressure is medium, such as figure 2 , 3 Shown; the welding electrode pressure is the smallest when it is at the lowest point, such as Figure 4 shown

The pressure of the welding electrode will directly affect the change of the contact resistance of the welding point, which will further lead to the change of the welding current, thus affecting the inconsistency of the strength of the welding point

If the welding electrode pressure is too high, the contact resistance of the welding point will decrease, and the current density will decrease. A large current is needed to ensure the welding point is firm. When the welding electrode pressure is too small, the contact resistance will increase, and welding will produce strong Therefore, when the electrode pressure changes sharply, only by increasing the electrode pressure and increasing the welding current can all the welding spots in a circle be firmly welded. The result of the sharp alternating change of the welding electrode pressure is: The welding electrode (copper plate) wears out quickly, and the high welding current causes serious overheating of the welding electrode and even the entire welding circuit, resulting in a large waste of electric energy. At the same time, because the electrode is welded in a moving state, the steel bar will often be burned if the current is too high

The electrode pressure is not constant, which leads to the inability to effectively control the pressing distance of the welding electrode. The welding electrode plate and the circumferential rib keep rubbing during the rotation process, which aggravates the wear of the welding electrode plate, and the service life of the welding electrode plate is very short.

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