Bury solder of arc snail column

Use commutate of fully control bridge, nail welder in order to reduce the bolt that I produced welder bulk and weight before, its bulk weight all is more than foreign congener product, investigate its reason basically is to solder the main circuit of power source is used " the double look turning over a star that takes balance reactor " circuit structure. In 20 centuries 70 time of 60 ～ , brilliant brake canal belongs to new product, rated electric current is lesser, ongoing hair " arc solder commutator " when used this kind of circuit, all the time continue to use up to now. According to the technical level that at present brilliant brake provides, plant this completely conditionally commutate of bridge of fully control of main circuit instead, not only leave out balance reactor, reduce weight to make an appointment with 40 ～ 60kg, and the utilization factor of transformer also raises 95 ％ by 80 ％ , still use high-powered silicon steel at the same time piece; The installation means of transformer also by vertical instead horizontal, make the bulk of welder and weight are reduced substantially, weight falls respectively by 500 much Kg 330kg and 350kg, and bulk also narrowed 600mm of × of 980mm × 540mm, excel heart looks Koco congener bolt nails welder. This kinds of bulk the new-style welder with small, light weight, special the steel structure architectural that agrees with to move often uses the site. 2.

Use sheet piece machine raise control level to use sheet piece engine control already became assess bolt to nail (solder of column of the snail that bury arc) the main index of welder technology level. RSN(M)5, 2500/3150 welder, use 8 high-powered sheet piece machine (PIC16F877A) control solders power source and solder program, choose big screen liquid crystal display, simplified circuit, the dependability that rose to move and solder the stability of quality. Because welder used sheet piece engine control technology, the kind of double negative feedback that can tie with hardware and software photograph undertakes soldering voltaic adjustment, the wave motion of made effectively stability and compensation because of voltage of electrified wire netting presses voltaic influence to solder. The compensation when be being reduced to range of fire of voltage of electrified wire netting is being created when welder is started especially important, assure to solder thereby the stability of quality. Odd an engine control and liquid crystal show, store solder parameter and solder bolt is nailed (reinforcing steel bar) computation, prevent same bolt to nail (reinforcing steel bar) repeat solder and the function such as welder breakdown self check, went to the lavatory solderer operation, be helpful for soldering the control of quality, make bolt is nailed (reinforcing steel bar) solder quality is had but date from sex, accord with the requirement of ISO9000 series standard. The addition of these new functions, its advantage is self-evident, make the technical level of welder makes high-end product very quickly by cheap product, can rival with entrance product. What be worth to carry more is: Prevent same bolt to nail (reinforcing steel bar) repeat soldering function, can ensure the solderer's person is safe. Because fasten is nailed (reinforcing steel bar) after soldering, in uproot in the process of welding torch, if touch accidentally,solder switch, be equivalent to the 2nd times soldering, of welder sub be in short circuit condition, short-circuit current (can amount to: The intense electric arc that 3000 ～ 4000A) produces mixes burn down collet welding torch, serious when but burn solderer, cause implicative other inductrial injury even, endanger life. Welder had this one function, with respect to the happening that can prevent these accidents. The another function of welder is to solder bolt is nailed (reinforcing steel bar) automatic computation and show, and record the plug that has on workpiece to nail only (reinforcing steel bar) solder. Nail to bolt (reinforcing steel bar) before soldering formally, examine control a process solder the process eliminates outer. Accordingly, record not only accurate, and improve efficiency greatly, managing manpower, this pair is strengthened it is management, important to carry out man-hour system of rating to have meaning. 3.

Have drop in temperature although the welding torch welding torch of device and oily damp device just places the hammer that hold bolt () of reinforcing steel bar, nail bolt (reinforcing steel bar) those who send bath hold a tool, but the stand or fall of its specifications is deciding bolt hammer greatly (reinforcing steel bar) solder quality and the comfortable sex that the solderer operates. Accordingly, we pass indefatigable effort, development gave performance admirable 8 model welding torch (2) seeing a picture. This welding torch has two big characteristics: (1) drops in temperature because device welding torch is sealed dustproof, medicinal powder hot condition is poor, after using 1h continuously commonly so, its interior temperature can be as high as 80 ～ 110 ℃ , cause coil framework extremely easily to be out of shape, serious when but the coil of burn down electro-magnet, reduce the reliability of welding torch greatly, cause scald possibly, endanger solderer security. The invention of my place is patent -- " welding torch drops in temperature device " , can make welding torch is after successive job 4h, the temperature rise that its hold position is worth under 30K, from go up at all solve afore-mentioned difficult problem. (Hammer of bolt of device of 2) oily damp inserts bath is the means that uses extruding, so inevitably meeting happens splatter. Bolt hammer diameter is thicker, its bath is bigger, splatter to also jump over advantages and disadvantages, produce scald and fire extremely easily. Because this welding torch must have damp unit, insert speed in order to reduce what bolt nails. When bolt hammer diameter works energetically when 14mm, its insert speed to should be restricted in 100mm/s. The has oily damp unit welding torch that I develop, reduced effectively when soldering splatter, the effect is very good. As a result of 8 model welding torch has above characteristic, its solder quality and the level that operate easy to already achieved entrance welding torch moderately. 4, use solder of column of the snail that bury arc to solder new technology undertakes reinforcing steel bar " T form solder " 1.

Bury beforehand configuration and technical requirement (1) bury beforehand configuration country stadium (bird's nest) some project needs to solder 1.

50 thousand " suspension column pole and prop up build frame " bury beforehand, its configuration is divided kind, if pursue,3a and graph 3b place are shown. Among them, anchorage muscle is mixed the dimension of anchor board and material are as follows character. Graph of solder of form of T of 3 reinforcing steel bar bury a configuration anchorage muscle beforehand: φ 20mm, HRB400. Inside anchor board: 80mm of × of 20mm × 80mm, q345B. Outside anchor board: 500mm of × of 30mm × 500mm, 860mm of × of 30mm × 540mm, q345B. (2) to be being buried beforehand " T form solder " technical requirement ① shows a structure to graph 3a place, solder anchorage muscle inside first on anchor board, the interval that presses the another end of anchorage muscle the regulation again next solders to be mixed in 500mm of × of 30mm × 500mm respectively of 860mm of × of 30mm × 540mm outside on anchor board. Show a structure to graph 3b place, the interval that presses anchorage muscle the regulation solders directly in 500mm of × of 30mm × 500mm outside on anchor board. ② is buried beforehand all " T form solder " all answer to undertake below flux layer. The mechanical function of ③ welding line should not be less than mother capable person. The gradient of anchorage muscle after ④ solder should be less than 1 ° . Quality assess should undertake before ⑤ solder, authoritative orgnaization issue examine report. Solder hind should nod one by one to undertake checking and accept to solder. 2.

Reinforcing steel bar " T form solder " a few problems that should solve (1) tailor-made a welding torch that promotes muscularity shows a structure to graph 3a place bury beforehand, good in solder inside after anchor board, the weight of component of its reinforcing steel bar is about 2.

6kg, plus the motion in welding torch the weight of the component will exceed 3kg, this welding torch to general use, the regular job that lasts very hard. For this, tailor-made an elevate force is 5kg, apply to clip to hold, solder the welding torch of this kind of workpiece, create a condition to finish solder replace Wu. (2) seek a group of first-rate to solder the contact that parameter uses solder of column of the snail that bury arc to solder, its are mechanical function exceeds mother ability only, ability shows solder the advantage of new technology, just have promotion value. For this, must assure welding line 360 ° are successive, do not have stomatic, slag inclusion and break. To burying a welder beforehand art research, test has around problem of this one core. Of course, function solders primely equipment and its appropriate static external characteristic are the premise condition that achieves this goal. Solder when the experiment, adjustable solder parameter basically has: Solder the electric current, weld time, thrust that extends height of length, promotion and reinforcing steel bar to insert bath and speed. Master the immanent connection of these parameter only, find out optimal combination, ability gets soldering admirably contact. (3) prevent and correct two kinds of weld defects in trying solder, the problem that encounters above all is welding line metal and surface of reinforcing steel bar do not have complete fusion, partial place has crack, even groove, and these place appear very easily still slag inclusion. Pass an analysis, consider as by the following examine - because of what cause: ① solders electric current small or weld time is short, the energy of the input is insufficient, bath is lesser, the temperature of surface of reinforcing steel bar near welding line is low, cannot effectively fusion is together, appear consequently aperture. ② solders when the end, the thrust that reinforcing steel bar inserts bath is too big, cause reinforcing steel bar to insert bath too deep, so that press the face of reinforcing steel bar with the metallic frit fluid that go out and inferior temperature cannot fusion, produce groove extremely easily. Settlement way: Increase solder electric current, weld time, or the thrust that reduces reinforcing steel bar to insert bath, use damp device when necessary, the insertion that restricts reinforcing steel bar deepness. The Jin in trying solder - another problem that often appears is to slant arc, create welding line all around distributing inhomogenous, aperture appears between welding line and reinforcing steel bar or groove, serious when what still create welding line is discontinuous, appear bite the flesh. Settlement way is the position that changes ground connection spot, use double ground contact, or soldering cable will solder to be circled 1 round all round workpiece, with balanced solder the magnetic field near the position. 3.

Reinforcing steel bar " T form solder " imitate craft experiments in April 2005, chengdu Si Da solders especially engineering department carried on the graph is shown 2 times bury beforehand after solder replace Wu, the structure according to workpiece and material are qualitative, the welder of column of the snail that bury arc that uses new development undertook imitate craft experiments, summing up Jin - decided on the foundation of check solder parameter, if test result expresses 2 to show. Experiment condition is as follows: Use welder: RSM3, 2500 anchorage muscle: φ 20mm, HRB400 armor plate: 12mm, q345B welding flux: HJ431 when can the test data of 2 induce from the watch view: (1) with respect to φ 20mm reinforcing steel bar character, undertake soldering by afore-mentioned craft parameter, the welding line of its test specimen inside 360 ° limits all successive, welding line height is average 7.

5mm, welding line width is average 3.

7mm, this is other solder the method achieves hard. Of course, want to acquire taller, broader welding line, still need to increase the fused length of reinforcing steel bar. (2) soldering below the circumstance with electric current and affirmatory weld time, the adjustment that reachs length and promotion height or measure border to have an error, do not have too big impact to the figuration of welding line. This says palpability buries the stability that solder of arc snail column solders, have very great real sense. Because the outfit of reinforcing steel bar blocks be manual operation, produce unavoidable of a few deviation. 4.

The quality inspection of solder of column of the snail that bury arc presses a watch the craft parameter of 2 soldered 4 test specimen send southwest to hand in big, press American ANSI/AWSD1.

1, 1998 standards undertake examining. Examine the project has welding line visual examination and mechanical function to examine. Among them 1, 2 test specimen do Kui - extend an experiment, 3, 4 test specimen do 30 ° bend test. Test result is all and eligible, see a table 3. Solder test specimen and test specimen Jin - Kui - the photograph after extending an experiment sees a picture 4. (A) does φ 20mm reinforcing steel bar solder test specimen (B) does φ 20mm reinforcing steel bar solder test specimen Kui - the bitmap that break a ministry 4 reinforcing steel bar " T form solder " test specimen photograph from 4 test specimen examine to you can see: as a result? ? ) the method that uses solder of column of the snail that bury arc undertakes to reinforcing steel bar " T form solder " , exterior of its welding line and mechanical function all obtained the provision of relevant specification, can satisfy completely bury a requirement that solders to reinforcing steel bar beforehand. (2) the RSM3 of new development, the performance of welder of column of the 2500 snail that bury arc is steady, can apply reinforcing steel bar to be buried beforehand solder. 5.

The macroscopical metallographic of welding line and the examination that metallographic organizes bury solder of arc snail column is a kind solder new-styly method, do its solder quality how? Whether is building of contented steel structure right bury beforehand requirement? To many people, the answer of very difficult affirmation, restricted its to popularize application consequently. Although afore-mentioned soldering,quality inspection result gave out satisfactory result, but for discreet for the purpose of, made macroscopical metallographic and the inspection that metallographic organizes again. (1) macroscopical metallographic did not discover the flaw such as stomatic, slag inclusion and crackle inside examination welding line. (2) the metallographic organization that the observation that metallographic organizes heats up influence area and heat of armor plate side to affect an area to side of welding line area, reinforcing steel bar had observation. Metallographic organization is better, can satisfy bury beforehand to soldering requirement. 6.

Undertake reinforcing steel bar with solder of column of the snail that bury arc " T form solder " because be opposite the welder of solder of column of the snail that bury arc art had more thorough knowledge, right the appears possibly problem in soldering had better settlement method, solder test specimen Jin - after southwest hands in exterior of pairs of big welding line, mechanical function and macroscopical metallographic and metallographic to organize examination qualification, we are right stadium of the country that finish (bird's nest) bury beforehand solder replace Wu was full of confidence, hurry off to construction site then, begin to be opposite bury beforehand undertake soldering actually. Be opposite above all φ 20mm reinforcing steel bar " T form solder " solder craft undertakes assess, use RSM3, 2500 welder, to the watch 2 solder listedly parameter is made a bit revise, by the graph 2 are shown bury beforehand the requirement undertakes trying solder, will solder test specimen sends " supervisory terminal of metallurgical industry quality detects center " undertake macroscopical metallographic and metallographic organize observation. Jin - think after expert analysis, assess: The reinforcing steel bar that undertakes with method of solder of column of the snail that bury arc " T form solder " , its welding line and the metallographic organization that heat up influence area are better, can satisfy bury beforehand to soldering requirement. The conclusion that this conclusion and southwest reach great place to make is basic and same. Jin - entrust after just agreeing with personnel of spot inspect manage, undertake soldering formally by the craft that already revised. Spot inspect manage nods one by one to undertake check and be metricaled to every solder, its examine the standard is: (1) welding line 360 ° should successive, welding line height should > 4mm, welding line width should > 2mm. (2) welding line does not have air hole and slag inclusion blemish. (3) welding line bites fleshy deepness <1mm. (4) gradient of reinforcing steel bar <1 ° . Have certificate of proof only solder contact ability is checked and accept. Because solder,operation personnel carried out reinforcing steel bar strictly " T form solder " welder art, abide by solder operating rules, make welder is made those who undertake is very successful, on schedule 1.

Of 50 thousand qualification bury a consign to entrust beforehand square, for national stadium (bird's nest) construction exhausted scanty power. Additional, solder of column of the snail that bury arc can undertake reinforcing steel bar not only " T form solder " , and still can undertake " solder of form of attrib wattle T " . Graph 5 it is the batten that railroad of some high speed prevents collision to defend column uses solder of column of the snail that bury arc to undertake (10mm of × of 80mm × 50mm) the imitate of T form solder solders test specimen. The welding line exterior of test specimen and mechanical function all can achieve design requirement. (A) batten (10mm of × of 80mm × 50mm) " T form solder " (B) φ 32mm reinforcing steel bar " T form solder " pursue 5 finish with solder of column of the snail that bury arc " T form solder " 5, epilogue buries solder of arc snail column is a kind, comfortable Yu Dazhi diameter (≥ φ 25mm) bolt is nailed (column of solder hammer, snail) solder, particularly comfortable the reinforcing steel bar at all sorts of diameters " T form solder " with batten " T form solder " . Use RSM3, the diameter of reinforcing steel bar that 3150 welder solder already achieved 32mm, the reinforcing steel bar of bigger diameter solders have not experiment; RSM3, 2500 welder apply successfully already at be opposite to solder the national stadium with quality extremely strict requirement (bird's nest) φ 20mm reinforcing steel bar is buried beforehand solder. Welding line Jin - cross visual examination, mechanical function to examine reach macroscopical metallographic examination, all obtained the provision of relevant specification, can satisfy bury a requirement that organizes to welding line metallographic beforehand. The welding line quality of solder of column of the snail that bury arc tall, besides completely sectional outside soldering characteristic, because used the method that buries arc,return, undertake protective to bath and welding line with welding flux, plus solder the process is pressed already the process of set undertakes automatically soldering, electric arc is consequently stable, solder the reappearance of quality is good, manufacturing efficiency is tall. Believe, RSM3 of welder of column of the snail that bury arc, 2500/3150 and upgrade replacement product RSN (M) 5, the development success of 2500/3150 and burying an actual application in soldering beforehand, the solder of form of T of reinforcing steel bar that builds an industry for steel structure and solder of form of attrib wattle T, and the bolt hammer of big diameter solders open up new way. CNC Milling CNC Machining