The main operation technology of welding rod arc welding

Bring arc Normal > (1) delimits brush a law---Aim welding rod weldment first, resemble welding rod striking the match again like delimit gently in weldment surface brush, ignition electric arc, mention welding rod quickly next 2-4mm, the stability that makes burns, normal > (2) knock---Target welding rod fag end weldment, bend below the artifice next, make welding rod slight touch weldment, mention welding rod again quickly 2~4mm, wrist of defensive position of ignition electric arc is put smooth, make electric arc maintains stable combustion. This kind of method that bring arc won't make weldment face cut, do not accept the restriction of weldment surface size, appearance again, it is the method bringing arc that aborning basically uses so. But the operation masters not easily, need to raise competence. Graph A of the 1 method that bring arc) the straight B that strike a law) delimit the Normal >normal > brings arc, need to notice following item: Normal > 1) brings arc place to should not have smeary, scale, lest produce air hole and slag inclusion. Normal > 2) welding rod wants in the hoist speed after be being contacted with weldment proper, bring arc too quickly hard, too slow welding rod and weldment are stuck together cause short circuit. Normal >normal >2. Carry a Normal > carries it is the it is the most important to solder segment in the process, it affects the outside figuration of welding line and immanent quality directly. After electric arc ignition, usually welding rod has 3 basic campaign: Face bath direction sends into gradually, move gradually along direction of welding, transverse swing. Normal > welding rod sends into gradually---Since adds a metal to be added to bath, also continue to maintain certain electric arc length to be after welding rod is fused, the rate that the rate that because this welding rod sends,receives should fuse with welding rod is same. Otherwise, can produce arc or stick on weldment. Normal > welding rod moves along direction of welding---As welding rod ceaseless and fused, form line of a solder gradually. If welding rod is mobile rate is too slow, criterion solder path is met too exorbitant, wide, appearance is not orderly, solder the meeting when thin plate happens burn wear a phenomenon; If the floating rate of welding rod is too rapid, criterion welding rod and weldment will be fused inhomogenous, solder road is narrower, happen even not solder appears a phenomenon. Should become with ongoing direction when welding rod is mobile 70, 80 degrees included angle, in order to make fused metal is mixed slaggy push rearward, otherwise the ahead of electric arc of slaggy flow direction, can cause the defect such as slag inclusion. Normal > welding rod transverse swing---So that,to be opposite weldment inputs enough quantity of heat at exhaust, cuttings pick-up, acquire the welding line of certain width or solder line. Administrative levels of form of the ply of weldment, groove, welding line mixes the limits basis that welding rod swings diameter of electrode will decide. A) B of angle of welding rod of flat position welding) carry a main action plan angle of welding rod of 2 flat position welding and carry a main action Normal >normal > carries commonly usedly a method and suitable scope: Normal >normal >(1) is straight carry a law---Introduce this kind of motion when the method solders, welding rod is not done transverse swing, make linear shift along direction of welding. Commonly used the butt joint flat position welding at I form groove, the ground floor solder of multilayer welding or multilayer multi-pass welding. Normal >(2) linear move back and forth carries a law---Introduce this kind of motion when the method solders, of welding line of edge of welding rod extreme fore-and-aft do swing back and forth. Its characteristic is to solder rate is rapid, welding line is narrow, medicinal powder heat is fast. Apply to the ground floor solder of the multilayer welding with thin plate and contact bigger gap. Normal >normal >(3) is zigzag carry a law---Introduce this kind of motion when the method solders, welding rod was not carried do zigzag swing continuously reach forward shift, pause moment a bit in both sides, wobbly purpose is for control of fused metal flow and get necessary welding line width, in order to obtain better welding line figuration. This kind carries a methodological aborning application is wider, multi-purpose at large board solder, the horn of the flat position welding, butt joint connect that admires solder, vertical position welding and vertical position welding receives contact. Normal >normal >(4) crescent moon carries a law---Introduce this kind of motion when the method solders, the extreme Normal > does the left and right sides of crescent moon form to swing along direction of welding. Wobbly speed wants to be mixed according to width of form of the position of welding line, connect, welding line solder voltaic value will decide. Need what do moment in contact both sides to stay at the same time, this is to make welding line brim has enough frit deep, prevent to bite an edge. This kind carries the advantage of a method is a metal fused and good, have longer heat preservation time, gas is easy separate out, slaggy also easily float comes up to welding line surface, welding line quality is higher, but the welding line Yu Gao that solder comes out is taller. This kind carries the applied limits of a method and zigzag carry the way is basic and same. Normal >normal >(5) triangle carries a law---Introduce this kind of motion when the method solders, welding rod extreme does successive triangular exercise, move ahead ceaselessly, according to swing of the form different, can divide mix for inclined triangle triangle two kinds, inclined triangle carries a law apply to solder flat position welding and the welding line of T form connect of the position that admire solder and the horizontal welding line that have groove, its advantage is can borrow welding rod swing will control fused metal, make welding line take shape good. the triangle carries the vertical position welding of a butt joint connect that the law applies to a groove only and welding line of T form connect, the characteristic is can solder gives larger welding line section, welding line produces the limitation such as slag inclusion not easily, be helpful for improving manufacturing efficiency. Normal >normal >(6) circle form carries a law---Introduce this kind of motion when the method solders, welding rod extreme is done continuously circle or movement of inclined circle body, do not break reach, circle form carries a law apply to solder the smooth welding line of thicker weldment, its advantage is bath existence time grows, bath metal temperature is high, be helpful for dissolving the separate out of the gas such as the oxygen in bath, nitrogen, facilitate slaggy rise. Inclined round figure carries a law apply to the smooth, horizontal welding line that admires welding line of connect of positional T form and butt joint connect, its advantage is benefit do not suffer gravitational effect at controlling fused metal and the phenomenon drips below generation, be helpful for welding line figuration. Graph 3 main use method 3. When ending of welding line of welding line ending, to do not appear end hole, welding rod should stop forward shift, and use delimit encircle ending law or break arc law repeatedly ground of from bottom to top pulls electric arc slowly, in order to make sure figuration of welding line rear is good. (1) delimits an ending law---When the terminus that welding rod moves to to solder, the act that uses a wrist does circle exercise, pull electric arc again till cram arc hole. This method is applied to thick board solder, use at thin plate to solder can have burn wear danger. (2) breaks arc law repeatedly---Welding rod moves to to solder when terminus, relapse in arc hole place the extinguish arc, number that bring arc second, till cram arc hole till. This method applies to thin plate and big electric current to solder, but do not apply to alkalescent welding rod, can produce air hole otherwise. CNC Milling CNC Machining