Automatic argon welding head

Abstract

The invention discloses an automatic argon welding head, which solves the problem that the prior art has defects to a certain degree in the structural performance. The automatic argon welding head is characterized in that a support system comprises an electric ring seat, a cooling water inlet and a cooling water outlet, a moving electric ring and a static electric ring can be arranged on the electric ring seat, a head positioning system comprises a spindle, a positioning rod, an expanding handle, an expansion connecting sleeve, an expansion spring, an elastic positioning device and an adjusting nut, a rotating system comprises a gear sleeve jacketed on the spindle, a spring sleeve, a spring and a moving electric ring, a welding gun system comprises a sealed gas hood and an insulating sleeve, and a ceramic sleeve is arranged on the opening of the sealed gas hood. The invention integrates water, electricity and gas, the head is small and light, the structure is simple, compact and practical and is more reasonable, the welding effect is better optimized, the formed weld seam is more beautiful, the welding efficiency is greatly improved, one person can operate 2-3 welding machines simultaneously, and the invention is applicable to the welding of heat exchangers, condensers, steam condenser pipes and air coolers in the petrochemical, power generation and other industries.

Description

Technical field: [0001] The invention relates to an electric arc welding device using shielding gas, more precisely to a welding head of an automatic argon arc welding machine used for welding stainless steel tube sheets and nozzles. Background technique: [0002] With the vigorous development of the whole nation, heat exchanger tube bundles, as an important part of the production and processing process, have increasingly put forward more and more requirements for welding quality and efficiency. Earlier, most manufacturers used manual arc welding and manual argon arc welding. These two welding methods have many disadvantages in the application of stainless steel welded pipe production lines: the cost of preparing the groove before welding the plate is high; the welding efficiency is slow; due to manual operation, the welding quality is not good. To ensure that the welding seam is uneven, the appearance is not beautiful, and the product qualification rate is low. [0003] Si...

AI Technical Summary

Problems solved by technology

Earlier, most manufacturers used manual arc welding and manual argon arc welding. These two welding methods have many disadvantages in the application of stainless steel welded pipe production lines: the cost of preparing the groove before welding the plate is high; the welding efficiency is slow; due to manual operation, the welding quality is not good. To ensure that the welding seam is uneven, the appearance is not beautiful, the product qualification rate is low, etc.

Some use a cup-shaped cover combined with an elastic locator and three-claw feet. The disadvantage is that it needs to be held manually. Moreover, the processing accuracy of the locator is quite high. Even so, in actual production, there are often quite large inner holes of the pipe on the workpiece The tolerance of the positioner will cause the positioner to locate with the inner hole of the pipe. The matching gap is either too large to achieve the purpose of precise positioning, or the gap is too small to be easily inserted into the pipe hole. Pull out from the tube hole

Some use a gantry-type operating frame to fix the welding torch, and the operation is very cumbersome. Every time a nozzle is welded, the X and Y two-dimensional positions of the welding torch must be repeatedly operated, and the conical surface of the cone positioner and the nozzle are used for positioning. In this way, the positioning accuracy is not high and the operability is poor.

Some airtight gas hoods lined with glass are easy to burn and break, especially when welding, the tungsten electrode and the metal airtight gas hood may be contacted and discharged, causing a short circuit

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