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 Wysłany: Wto 2:46, 11 Sty 2011 Temat postu: ugg italia Large welding gear Welding _2600 |
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Large welding Welding Gear
Hard and brittle martensite, the crack sensitivity of the hydrogen cooling great. And this welding gear used 34crNiM0 + Q345A +35 crM0 material structure, the connection with the surfacing layer transition, and the processing of the welding groove, so to not only ensure accuracy and avoid the assembly groove caused by heat generated at cutting quenched . High intensity level and intensity of Cr-Mo steel at lower levels relative to Q345A steel welding, the strain concentrated in the strength of easy deformation of the lower level side Q345A, and Q345A cracking susceptibility of high temperature and small. This improved their maximum welding. 3 welding method of welding for the 3.1 ring gear inside the hub outer buffer layer using submerged arc welding welding, combined with fetal transfer, modification, and other related tooling equipment. Ring gear, hub and spokes (Q345A) groove welds the same ring carbon dioxide gas welding, combined with modification, etc. tooling equipment. The rest are used for welding of carbon dioxide gas welding. Surfacing welding for the welding specification 3.2: Welding current 380440 (A) welding voltage 28-300 /), welding speed 320-370 (mrn / min) groove specification: Welding current 300350 (A) welding voltage 30-35 ( ,,) welding speed 300-350 (mrn/min13-3 welding materials inside a large ring gear, hub outer transition layer welding using submerged arc welding materials, welding (H08MnA, qb4 + SJ101). big ring, wheel hub and Spoke (Q345A) ring groove welding flux cored wire welding material using the U.S. (E70T a 5 alkaline, 1.6). The rest of the welding seam to use solid wire (HO8MnA, 1.2). 3.4 before welding technical requirements check ring gear, wheels, and other relevant parts of the rough size and weld parts allowance, the deformation of the ring gear. Clean and magnetic particle inspection ring gear, hub, spoke of the welding surface and groove surface ensure that no crack. Check the deflection device,[link widoczny dla zalogowanych], switch tires, preheating equipment and other tooling equipment. adjustment related to the test measuring tools, equipment (thermometer,[link widoczny dla zalogowanych], spirit level, ruler, etc.) to ensure the accuracy of measurement. Gear surfacing on the deflection device, hub of the welding bench in turn, gear parts in the overall on deflection devices using the infrared device warm, stone cotton insulation, while propane gas ready to add one to two hot spots, thus ensuring the temperature is always in the required range. consumables required to be drying, thermal insulation, as used with the check. 3.5 3.5.1 the technological requirements of welding preheat ring gear wheel welding preheat temperature is 300350 ~ C, surfacing layer and spoke of the groove weld preheat temperature of 100-150 ~ C, interpass temperature of not less than the lower limit of the preheating temperature. 3.5.2 welded ring gear, hub of the welding using submerged arc welding, multi- multi-pass welding, asbestos-covered slow cooling after welding, Stress Relief Annealing; groove weld in the deflection device to the flat welding position on the rotating welding,[link widoczny dla zalogowanych], inside and outside the ring cross-welding, soldering After one side and then solder the other side; double-sided,[link widoczny dla zalogowanych], inside and outside the groove After welding and then welded seam ribs between the spokes, the final connection between the spokes on the cylinder assembly and welding. Check all welds free of cracks, cleaning up after the elimination of stress annealing welding slag. 4 large gear assembly sequence 4. 1 Check the correct size of all parts after the assembly and welding. 4.2 ring gear on the platform, supporting the leveling pad. 4-3 loaded one of the spokes, to ensure uniform circumferential groove bottom of the solder joints after welding with a gas-solid . Spot Welding baked to warm up to around the spot. 4.4 ring gear, spoke stand leveling support pad, the pad support ring and hub height is greater than half the width of the poor. 4.5 into the wheel hub,[link widoczny dla zalogowanych], to ensure uniform circumferential groove bottom of the solder joints after welding with a gas-solid spot in the spot when baked around the preheating. 4.6 drawings decorate the location between the ribs spokes. 4.7 installed to another spoke to ensure uniform circumferential groove bottom of the post-gas arc welding ribs between the spokes, spokes and ring gear, wheel spokes and a solid spot. spot to the spot when baked to warm up around. 4.8 to decorate lifting gear solid device on the deflection, to find the center of preheated welding. 4.9 8 final assembly and welding connection cylinder. 5 results of weld quality inspection and smooth surface, forming well. appearance inspection, no there is lack of fusion and surface porosity and other defects. GB11345 groove welds by ultrasonic testing inspection, all qualified. The rest of the weld inspection magnetic particle testing found no cracks. to meet the requirements of the drawings metalwork finish this gear has been referred to the current user. 6 Conclusion By The welding gear to prove that this process plan is feasible. to provide similar products manufactured after the welding process and the data reference. later in the manufacture of (D ≤ 4m) can be used when welding gear, so that the shorter duration and manufacturing cost savings.
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