CN108907606A - CLOOS welding robot welding gun restorative procedure - Google Patents

Abstract

The invention discloses a welding torch repair welding method of a CLOOS welding robot. The conductive tip of the welding torch is composed of an inner tube and an outer tube, the inner tube is a brass tube or a red copper tube, the outer tube is a brass tube; the inner tube of the conductive tip is a red tube. The repair welding method of copper pipe is: S11, brazing welding with phosphor copper electrode as filling material; temperature is 710°C-810°C; S12, 8-shaped moving flame of welding torch; S13, phosphor copper electrode for outer casing; inner tube of conductive tip The repair welding method for brass tubes is: S21, using silicon-containing welding wire, the inclination angle between the welding tip and the workpiece when welding the inner tube is 72°‑78°; using the left welding method, the welding wire and the surface of the weldment are inclined 20°‑40°, the welding tip and welding wire should cross and swing evenly during welding. The invention has the advantage that it is specially designed for repairing the welding torch of the CLOOS welding robot, so as to prolong the service life of the welding torch of the CLOOS robot and save resources.

Description

CLOOS welding robot welding torch repair method

technical field

The invention relates to a CLOOS welding robot, in particular to a method for repairing a welding torch of a CLOOS welding robot.

Background technique

During the welding process of the CLOOS welding robot (supplier: Karl Cruz Welding Technology (Beijing) Co., Ltd.), it is necessary to use sensing to determine the position of the starting point of welding. The contact tip of the welding gun used by the CLOOS welding robot is a double-layer tube structure, as shown in Figure 1. The inner tube 1 is a brass tube or a red copper tube, and the outer tube 2 is a brass tube; the outer tube 2 is used to pass cooling circulating water to cool the contact tip, and the inner tube is used to wear the welding wire 3 . Due to the sensing current and the electrolysis of the cooling circulating water, the position of the inner tube 3 of the welding torch contact tip and the position of the cooling circulating water port 4 is subjected to electrolytic corrosion and breaks. In addition, due to the complex structure of the welding workpiece and the configuration of the equipment itself, the contact tip of the welding torch often collides during the welding process and causes damage. CLOOS welding robot welding torches are expensive, and the above-mentioned factors that cause welding torch breakage and damage also make CLOOS welding robot welding torches become vulnerable parts.

Contents of the invention

The purpose of the present invention is to provide a welding torch repair method to solve the internal damage of the welding torch caused by corrosion and collision.

To achieve the above object, the present invention takes the following technical solutions:

Inventing the CLOOS welding robot welding torch repair welding method, the conductive tip of the welding torch is composed of an inner tube and an outer sleeve, the inner tube is a brass tube or a red copper tube, and the outer sleeve is a brass tube;

The repair welding method that the inner tube of the contact tip is a red copper tube is as follows:

S11. Before welding, it is necessary to repair the rust and oil on both sides of the weld. The surface of the weld should be polished with a file, metal brush or sandpaper to remove the oxide film on the surface; the inner pipe weld should be brazed with phosphor copper electrode as the filler material. ; The brazing temperature of the phosphor copper electrode is 710°C-810°C, using flux 301 as the flux; the flame adopts a neutral flame;

S12. When welding the inner pipe, preheat around the weld seam, and keep a distance of 2-6mm between the end of the flame core and the surface of the workpiece; first perform inner pipe welding, and the welding torch moves the flame in a figure-8 shape, and the weldment should be considered during welding Heating with the welding wire; the welding is completed; after the inner pipe is welded, it is kept warm and cooled, then the surface of the inner pipe is ground, and finally the water injection test is carried out in the pipe, and the outer pipe is welded to ensure that the inner pipe does not leak;

S13. In order to ensure that the weld seam defects of the inner pipe are not caused when the outer pipe is welded, the filler material selected for the outer pipe is also phosphor copper electrode. After the weld seam of the outer pipe is evenly welded, heat preservation treatment is carried out, and then surface grinding is carried out;

The repair welding method in which the inner tube of the contact tip is a brass tube is as follows:

S21. Using silicon-containing welding wire, the inclination angle between the welding tip and the workpiece is 72°-78° when the inner pipe is welded; before the inner pipe starts welding, first use a baking gun to quickly heat the weldment, and when the baking gun is heated, it will be in contact with the workpiece The angle formed is 80°-90°, and then gradually decreases, the distance between the flame core and the molten pool is 5-10mm; when welding the inner pipe, the left welding method is used for welding, and the metal is heated to a molten state before welding, and then filled with welding wire , The welding wire and the surface of the weldment are inclined 20°-40°. When welding, the welding nozzle and the welding wire should cross and swing evenly to avoid welding defects; The outer casing is welded to ensure that there is no water leakage in the inner pipe; in order to ensure that the weld seam defects of the inner pipe are not caused when the outer casing is welded, the filler material selected for the outer casing is also brass welding rod, and the stress relief annealing is carried out at 350-450°C after welding. , followed by surface grinding.

The invention has the advantage that it is specially designed for repairing the welding torch of the CLOOS welding robot, so as to prolong the service life of the welding torch of the CLOOS robot and save resources.

Description of drawings

Fig. 1 is a schematic structural view of the contact tip of the welding torch of the CLOOS welding robot according to the present invention.

Detailed ways

The CLOOS welding robot welding torch repair welding method according to the present invention, the conductive tip of the welding torch is shown in Figure 1, and is composed of an inner tube 1 and an outer sleeve 2, the inner tube 1 is a brass tube or a red copper tube, and the outer sleeve 2 is a brass tube;

The repair welding method for the inner tube 1 of the contact tip is a red copper tube is as follows:

S11. Before welding, it is necessary to repair the rust and oil on both sides of the weld. The surface of the weld should be polished with a file, metal brush or sandpaper to remove the oxide film on the surface; the weld of inner pipe 1 should be brazed with phosphor copper electrode as the filling material. Welding; the brazing temperature of phosphor copper electrode is 710°C-810°C, which has good fluidity and wettability, and flux 301 is used as flux; the flame adopts neutral flame;

S12. When welding the inner tube 1, slightly preheat the periphery of the weld, and keep the distance between the end of the flame core and the surface of the workpiece by 2-6mm; first perform the welding of the inner tube 1, because the tube wall of the inner tube 1 is relatively Thin (thickness about 1mm), special attention should be paid to the fusion state when welding. It is necessary to ensure the degree of fusion and avoid welding collapse (welding leakage). The welding torch cannot always stop at one point. When welding, the welding torch moves the flame in a figure 8, taking into account the weldment Heating with welding wire 3; the welding time should not be too long, and it should be completed at one time; after the inner pipe 1 is welded, keep warm and cool, then perform surface grinding of the inner pipe 1 weld (to ensure a smooth surface), and finally conduct a water injection test in the pipe. Pipe 1 has no water leakage and welds the outer casing 2;

S13. In order to avoid weld defects of the inner pipe 1 caused by the welding of the outer sleeve 2, the filler material selected for the outer sleeve 2 is also a phosphor copper electrode. After the weld of the outer sleeve 2 is evenly welded, heat preservation treatment is performed, and then the weld is performed surface grinding;

The repair welding method for the inner tube 1 of the contact tip is a brass tube is as follows:

S21. Zinc, the main alloying element of brass, melts at 420°C and vaporizes at 906°C; therefore, preventing the oxidation and burning of zinc without causing a decrease in mechanical properties and corrosion resistance is a prominent problem for gas-welded brass ; In order to prevent the oxidation and evaporation of zinc, a silicon-containing welding wire 3 is used; silicon is oxidized to _{SiO 2} , and the dense _{SiO 2} film is on the surface of the molten pool, preventing the zinc in the molten pool from being oxidized and evaporated, and can prevent The dissolution of hydrogen; at the same time, the welding wire 3 should also contain elements such as Fe, Sn, etc., and these elements can further prevent the oxidation and evaporation of zinc. The gas welding flame adopts a very weak oxidizing flame; the thermal conductivity of brass is worse than that of pure copper, the thickness of the inner tube 1 of the conductive tip of the CLOOS welding robot is about 1mm, and the thickness of the outer tube 2 is about 3mm, so a slight preheating is required before welding; the inner tube 1 When welding, the inclination angle between the welding tip and the workpiece is 72°-78°; before the inner tube 1 starts welding, first use a torch to quickly heat the weldment, and the angle between the torch and the workpiece is 80°-90° when heating. Then gradually decrease, the flame core is 5-10mm away from the molten pool; the inner pipe 1 is welded by the left welding method, and the metal of the weldment is heated to a molten state when welding, and then filled with welding wire, the welding wire 3 is inclined to the surface of the weldment 20°-40°. During welding, the welding tip and welding wire 3 should cross and swing evenly to avoid welding defects; 1 Water injection test; welding the outer casing 2 to ensure that the inner pipe 1 has no water leakage; in order to ensure that the weld seam defect of the inner pipe 1 is not caused when the outer casing 2 is welded, the filler material selected for the outer casing 2 is also a brass electrode. Carry out 350-450 ℃ stress relief annealing treatment, and then carry out surface grinding treatment.

Claims (1)

1. a kind of CLOOS welding robot welding gun repairs welding method, the ignition tip of the welding gun is made of inner tube and outer tube, Said inner tube is brass tube or red metal pipe, and the outer tube is brass tube；It is characterized in that：

The ignition tip inner tube is that the reparation welding method of red metal pipe is：

Removed before S11, weldering and completely need to repair rust, the greasy dirt of weld seam two sides, face of weld using file, metallic brush or sand paper into Row polishing removes the oxidation film on surface；Inner tube weld seam selects phosphor-copper welding rod to carry out Welding as packing material；The phosphor-copper The brazing temperature of welding rod is 710 DEG C -810 DEG C, is used as fluxing agent using solder flux 301；Flame uses neutral flame；

It, will be between the flame core end of flame and workpiece surface holding 2-6mm to being preheated around weld seam when S12, inner tube welding Every；Inner tube welding, welding gun 8-shaped movable flame are first carried out, when welding will take into account the heating of weldment and welding wire；Welding is primary complete At；Heat preservation, cooling, then carry out inner tube figuring of surface, water injection test in pipe are finally carried out, in guarantee after the completion of inner tube welding Pipe is without drainage welding outer tube；

It S13, is to guarantee to cause inner tube weld defect when not welded by outer tube, the packing material that outer tube is selected also is phosphor-copper weldering Then the complete rear progress isothermal holding of outer sleeve weld joint uniform welding is carried out figuring of surface by item；

The ignition tip inner tube is that the reparation welding method of brass tube is：

S21, using siliceous welding wire, tilt angle when inner tube is welded between weldering nozzle and workpiece is 72 ° -78 °；Inner tube starts to weld Weldment is heated rapidly using grilled gun first before connecing, with workpiece angulation is 80 ° -90 ° when the grilled gun heats, then again by Decrescence small, inner cone is away from molten bath 5-10mm；It is welded when inner tube is welded using leftward welding, first by METAL HEATING PROCESS to molten when welding State, refills welding wire, and welding wire and weldment surface tilt 20 ° -40 °, and weldering nozzle and welding wire will intersect uniform swing when welding, to avoid Welding defect；Inner tube carries out inner tube figuring of surface after being soldered heat preservation, cooling, then carries out water injection test in pipe；Guaranteeing inner tube Without drainage welding outer tube；To guarantee to cause inner tube weld defect, the filling that outer tube is selected by outer tube when not welded Material is also brass welding rod, and postwelding carries out 350-450 DEG C of stress relief annealing processing, then carries out figuring of surface processing.