Snail column solders technical application

1mm, workpiece the reverse side is not had be out of shape, impress, comfortable solder at thin plate; Can use at soldering the metal such as carbolic steel, stainless steel, aluminous, copper and its alloy; Board thick with snail column diametical comparing can amount to 1 ∶ 10. Store can equipment of solder of type snail column differs according to the configuration of welding torch, can divide for contact and clearance type two kinds. Solder of contact snail column relies on column of snail of impaction of bedspring of the buy inside welding torch, the distance between workpiece and snail column is assured by stage of small protruding of snail capital ministry, when capacitance discharges, small protruding stage is rapid aerification, electric arc appears between snail column and workpiece, the quantity of heat that electric arc produces makes snail capital ministry forms fused layer, workpiece surface forms very shallow bath. Inside welding torch buy bedspring pressure falls, snail column sinks quickly, inside 3 ～ 4ms, bath of snail column immerge, electric arc disappears, bath refrigeration is formed quickly solder contact (see a picture 1) . Graph 1 contact snail column solders column of snail of process clearance type solders process and solder of contact snail column are roughly identical, what nevertheless the column of bedspring impaction snail with contact and workpiece contact differ is, clearance type is to pass dynamoelectric or it is certain that pneumatic means promotes snail column snail column from workpiece surface distance, next snail column sinks, at the same time capacitance discharges, electric arc arises between snail column and workpiece. This kind solders means and contact photograph are compared, weld time is shorter. (1) solder craft parameter. Store can the craft parameter of solder of type snail column basically has: Snail column diameter, solder voltage, weld time and snail column extend length. Store can solder of type snail column has a marked characteristic only: Capacitance discharge process cannot accuse, weld time is not adjustable. Snail column extends length to be able to decide according to experience, be in normally 1.

0 ～ 1.

Between 5mm. Store can of solder of type snail column solder energy is by the capacitance of snail column welder the capacitance of the group mixes charge voltage decision: W ＝ CU2, among them, w- solders of equipment rated store energy, the total capacitance of C- capacitor group, u- charges voltage. Store can the instant of equipment of solder of type snail column solders voltaic peak value is 1000 ～ 10000A about, this depends on equipment capacitance, charge voltage, solder loop resistor and inductance. Will tell commonly, from the security consideration that protects handlers and equipment itself, charge voltage is normally in 200V. When leaving factory as a result of equipment, capacitance is already fixed, when working actually so, can adjust only charge voltage, mix according to size of snail column diameter workpiece board is thick, decide appropriate voltage is worth. (2) equipment composition and characteristic. Store can equipment of solder of type snail column by solder clamp of power source, welding torch, ground wire and the partial composition such as mixture cable. Increase the auxiliary equipment such as automatic food chute to be able to configure column of semi-automatic or automatic snail to solder equipment. The basis solders of power source and snail column norms different, solder by hand efficiency can amount to 15 / Min left and right sides, solder automatically can amount to 50 / Min left and right sides. Store can operation of equipment of solder of type snail column is simple, equipment is deft, apply to not diametical ≤ 10mm, high to joining intensity asks snail post to solder. 2. Solder of column of snail of the type that pull arc pulls column of arc type snail to solder with store can the capacitance discharge that type solders is different, it is to pass brilliant brake to be in charge of pilot direct current source or inversion type to solder power source will undertake soldering. Welder of column of snail of the type that pull arc art, the metal of snail column and workpiece fuses the quantity is compared store can solder of type snail column is much, frit is deep deeper, the influence solders the parameter of quality is relatively complex, snail column can susceptive strength is greater also. Basis of solder of column of snail of the type that pull arc the accident of weld time, but fractionize is solder of column of long periodic snail and solder of column of short period snail. The working process of solder of column of snail of the type that pull arc is (see a picture 2) : Snail column contacts workpiece, snail post is used after electrify column of fixture promotion snail, stable combustion electric arc appears between snail column and workpiece right now, electric arc heats up ministry of fused snail capital and workpiece surface, subsequently snail column fixture oppresses snail column sinks to workpiece bath, after cutting off the power, form solder contact. Solder of column of short period snail and the place that grow solder of periodic snail column to differ are weld time be solder of column of long periodic snail only very one of going to a few. Additionally solder of column of short period snail is soldering there is to guide electric arc before electric arc appears, its action is the smeary, grease of cleared workpiece or surface of snail capital ministry or coating. Nextpage pursues column of 2 short period snail solder process (1) solder craft parameter. Column of snail of the type that pull arc solders craft parameter basically has: Solder column of height of the electric current, weld time, electric current that bring arc, time that bring arc, promotion, snail is extended length and time sending a hammer. Solder electric current -- diameter of flange of ministry of capital of main basis snail will choose, common mild steel, solder the relation of electric current and snail column diameter is: Solder of column of short period snail, I ＝ (95 ～ 110) D, 3 ～ of D ＝ 15mm; Grow solder of periodic snail column, I ＝ (50 ～ 100) D, 16 ～ of D ＝ 30mm. To galvanization snail column or the snail column that solder to go up in galvanization workpiece, solder electric current needs to increase 20% . In be being operated actually of course, can adjust weld time according to workpiece ply. Weld time -- solder of column of short period snail, tw ＝ (4 ～ 5) D, 3 ～ of D ＝ 15mm; Grow solder of periodic snail column, tw ＝ (10 ～ 100) D, d ≥ 16mm. Come to solder of column of short period snail character, weld time is normally between 20 ～ 100ms; Grow solder of periodic snail column, to soldering normally intensity asks tall, bath is deep, weld time is 200 ～ 2000ms. No matter solder of column of short period snail or solder of column of long periodic snail, its weld time and solder electric current is comprised jointly solder input quantity of heat, can cooperate each other, adjust neatly. The electric current that bring arc and the time that bring arc -- parameter of these two craft plays cylinder of arc type snail in short period only appear in solder, the purpose is the smeary, grease of cleared workpiece surface and flange of snail capital ministry or coating. The electric current that bring arc is 30 ～ 50A commonly, adjustable scope is less; The time that bring arc is 20 ～ 40ms normally. At present the electric current bringing arc of welder of a lot of brands is in with the time that bring arc when leaving factory, already set to secure a value, not adjustable. Promotion height -- snail column promotion is to decide to solder highly a of quality important parameter. It and snail column diameter become direct ratio. The electric arc that place of the short circuit when because frit drips,promotion can prevent effectively to transfer highly causes is flabby and solder figuration is undesirable. But, exorbitant promotion also has adverse one side highly: Because the growth of electric arc is easy,be produce magnetism to slant play a phenomenon, the influence solders quality; 2 it is to increase amount of welding line stoma. This is a more sensitive influence solders the element of quality. To solder of column of short period snail, use electromagnetism induction to promote snail the welding torch of column, promotion is normally highly 1.

2mm, use servo electric machinery to promote snail the welding torch of column, promotion is normally highly 1.

5mm. Snail column extends length -- snail column extends length for solder of column of periodic to growing snail, it is the length with snail fused column and the sum of workpiece bath deepness, become direct ratio with snail column diameter, experience value is in 1.

5 ～ 6mm; Solder to column of short period snail and character, the snail column of electromagnetism type welding torch extends length is snail column fused length machines a frit deep, it is normally 1.

2mm; The snail column of welding torch of type of servo electric machinery, its extend the length with gun mouth regular end panel, it is facilitating snail column and workpiece contact merely, and the circuit short circuit that forms stability, it is normally 2.

2 ～ 3mm. The snail column of welding torch of type of servo electric machinery fuses length and workpiece bath deepness are alone parameter to be worth, extend length to do not have immediate impact with snail column. Solder column of electric current, weld time, snail promotes height and snail column to extend length is welder of column of snail of the type that pull arc art 4 important parameter, should mix according to snail column diameter in real work workpiece ply, material comes character set. Want to undertake for many times trying solder, according to soldering effect adjustment gives appropriate craft parameter. (2) equipment composition and characteristic. Facility of solder of column of snail of the type that pull arc is main by solder the composition such as system of power source, control, welding torch and ground connection clamp, send material equipment according to asking to still can deploy what send a hammer automatically. Solder normally power source is united in wedlock together with control system, call solder lead plane. At present advanced welder used microprocessor and liquid crystal to display screen, accurately setting and record, memory solders parameter, can soldering monitoring of the real time in the process, number shows. What major welder power source uses is commutator of solder of arc of control of brilliant brake canal; Advanced welder power source used inversion formula direct current source. To get stable electric arc, power source of snail column solder is direct current source, have steep fall external characteristic, taller sky carries voltage. The biggest characteristic of solder of column of snail of the type that pull arc is instantaneous big electric current, so the requirement solders power source solders inside very short time electric current reachs set value, the time that electric current of welder of column of short period snail rises is shorter, if the capacity inadequacy of power source of power supply electrified wire netting can be brought about,solder the voltage of power source is flabby, and cause solder quality is undesirable. At present with respect to welding torch character, the welding torch of electromagnetism induction type that solder of column of long periodic snail sends a hammer with handiwork is given priority to; The welding torch of type of servo electric machinery that solder of column of short period snail nails with sending automatically in the position with manufacturing high metre is given priority to, of course solder of column of short period snail is producing the position with not high metre to be able to use manual welding torch. Snail column solders the technology solders in the applied snail column of automobile industry have fast, reliable, operation to reach the good point such as the join that do not have aperture simply, the riveting in replacing a car to make, study the join technology such as whorl and bore. At present snail column is in the action inside car railroad car is fixed wiring harness, interior trim wait with carpet; The action outside railroad car is the chassis accessory such as vitta of fixed wiring harness, vitta, apply the brake and thermal insulation board, flowguide. Snail column makes medium use quantity grow increasingly in the car now, it is with the model of divine dragon company exemple, snail column of Ailishe makes dosage is 50 many, beautiful the snail column of 307 makes dosage is 106, the snail column of Xue Tielong C5 makes dosage is 187. The car makes middling if the graph is shown 3 times,use snail column type. Graph 3 cars make kind of column of commonly used snail store can solder of type snail column weld time, solder electric current is not adjustable, frit is deep very shallow, the application in automobile industry is very few. The technology of snail column solder that at present automobile industry uses is short period pulls solder of column of arc type snail, basically use inversion type to solder power source. Solder lead plane used computer technology, automation technology, have software of parameter work out, process designing operation is very direct, have breakdown ego to diagnose a system at the same time, facilitating equipment is maintained. Solder lead plane can be linked together through RS232 interface and notebook computer. One solders lead plane can join 5 welding torch, rose to solder greatly the utilization rate of lead plane. The last few years, welding torch develops by pneumatic dynamoelectric, interior has snail column to promote the journey to survey a system, with photograph of technology of servo electric machinery union controls snail column accurately to promote height, ensure solder quality. In addition, snail column solders equipment can be formed with union of automation equipment photograph full automatic snail column solders, in divine dragon car 2 platform floor combines outfit line, what used equipment of snail column solder and band of photograph of PLC control equipment is full automatic snail column solders. The solder of robot snail column that snail column solders to equipment and robot technology photograph are united in wedlock and be formed has gotten applied in automobile manufacturing industry, if German people corporation had used this technology. Snail column solders the ceaseless development that development trend of the technology reachs technology of electronic electric power as computer technology, automation technology, the way that solders to equipment is being changed to automation, intelligence and be digitlized at present develops, snail column solders the technology solders as a kind technical craft also is in of course complying with this trend. IGBT inversion type solders power source is replacing brilliant brake to be in charge of pilot to solder power source, control system used microprocessor and liquid crystal to display screen, make solder operation of parameter process designing is simple and direct. Welding torch of pilot of servo electric machinery is replacing bedspring mechanical welding torch, can control the promotion route of snail column accurately, make solder quality is more reliable. Epilogue is changed relative to Yu Rong extremely aeriform protection solder, TIG solder and the arc welding such as the solder that bury arc receive kind, column of snail of electric arc of domestic research application solders technical time has ten years only, nevertheless home already had very great progress to the research of technology of snail column solder and equipment, the snail column that domestic manufacturer has rolled out function to be perfected quite solders equipment. But the productivity that equipment manufacturer still does not have welding torch of type of servo electric machinery, should increase research strength, roll out the product that photograph of as advanced as abroad level rivals at an early date. CNC Milling