39results about How to "Reduce welding man-hours" patented technology

The invention discloses a strategic petroleum reserve tank steel plate based on oxide metallurgy and a manufacturing method of the strategic petroleum reserve tank steel plate. The yield strength of the steel plate is large than or equal to 490 MPa, the tensile strength is 610-730 MPa, and the yield ratio is smaller than or equal to 0.90. The manufacturing method comprises the steps that a continuous casting billet is manufactured, heated for heat preservation, roughly rolled, finely rolled, directly quenched and cooled at the speed being larger than or equal to 50 DEG C/s, heated, tempered and subjected to air cooling. The steel plate is also applicable to manufacturing of large strategic petroleum reserve tanks with the volume being 100000 m<3>, 150000 m<3> or more; when the steel plateis subjected to large heat input welding when heat input is large than 200 KJ/cm, after welding, the welding heat affected zone -20 DEG C impact energy is not lower than 80 J; a two-face two-pass X-type welding way which sets limitations for 25-60 mm steel plates in existing petroleum reserve tank construction is expected to be changed into single-face single-pass V-type welding, welding labor hours can be reduced by one half almost, the petroleum reserve tank construction speed is remarkably improved, the strategic petroleum reserve tank building cost is greatly reduced, and the application and popularization prospect is quite good.

The present invention relates to a shell-and-tube heat exchanger and hemispherical head one-side weld narrow gap welding process. It is characterized by that its backing weld adopts pen-type manual argon shielded are welding process, its welding material adopts mushroom-type consumable backing ring; the transion weld adopts electrode electric arc welding process, adopts spray coating spatter-proof material; and its main weld adopts narrow gap submerged-arc automatic welding process.

The invention discloses a single edge groove submerged arc welding technique of a plate with moderate thickness. The technique utilizes a DC (direct current) opposition method, and comprises the following technical steps: first to third layers on the facade: a phi 3.2 welding wire is utilized, the current is 380-400A, a rod is stretched by 2.8-3.0cm, the voltage is 24-25V, and the speed is 55-57cm/min; the other layers on the facade of the welding rail: a phi 4 welding wire is utilized, the rod is stretched by 3.0-3.5cm, the current is 560-600A, the voltage is 28-30V and the speed is 45-50 cm/min, or a phi 4 welding wire is utilized, the rod is stretched by 3.8-4.0cm, the current is 650-680A, the voltage is 33-34V, and the welding speed is 38-40 cm/min; and the back surface layer: a phi 4 welding wire is utilized, the rod is stretched by 3.8-4.2cm, the current is 680-700A, the voltage is 34-35V, and the speed is 34-36 cm/min. According to the invention, the submerged arc welding is directly used for bottoming, and no back chipping is performed on the back surface of the weld, thereby solving the complex welding method of the traditional technique, guaranteeing the percent of pass of the weld flaw detection, reducing the welding time and saving the welding material.

The invention relates to a welding process, in particular to an automatic submerged arc welding small groove welding process. The welding process comprises the following steps: a groove is cut on a welding piece, the angle of one side of the groove is 35 degrees, and the angle of other side of the groove is 45 degrees; the H pair group of the welding piece is performed, and the welding piece is fixed by the spot adhibiting method, and the spot adhibiting fixing welding seam is arranged on the 45-degree side of the groove; the welding piece is welded, the 35-degree side of the groove is firstly welded, when one-third of the 35-degree side of the groove is welded, the root part of the 45-degree side of the groove is cleaned, after the cleaning, the welding continues, through the repeatedly staggered welding, the weld pass is completely filled. Compared with the prior art, the welding process has the advantages of reducing the welding time, improving the welding speed of the workpiece, ensuring the scheduling requirements on a project, reducing the filler level of weld metal, saving one-third of welding materials, directly improving actual economic benefits and reducing the welding deformation; moreover, because the angle of the groove is reduced, the welding process also has the advantages of reducing the pre-heating width of the welding seam, lowering the defect of the welding seam and lowering the repair cost.

The invention relates to a welding technology of shell covers and a cylinder body of an aluminum alloy tank. The welding positions of the shell covers and the cylinder body are polished before welding; gaps are left between the shell covers and the cylinder body in advance, and then TIG is used for welding and fixing on the outer side; finally, the shell covers and the cylinder body adopt the two-side arc-alignment TIG for welding. The welding technology eliminates the situation that when a manual TIG welding method is used for welding the circular seams between the front shell cover and the cylinder body and between the back shell cover and the cylinder body, chain-shaped air hole welding defects exist at the longitudinal center positions of welding seams, the qualified welding seams canbe obtained, and the safety of a tank assembly is ensured.

The invention relates to a method of using a robot for automatic welding of forged coupler yokes. The welding method includes the steps: (1) forming a shape of an X-shaped weld groove, arranging a water cooling pad at the lower end of the X-shaped weld groove after a weld part is fixed, flushing the water cooling pad with the center of the groove, fixing the water cooling pad to the groove, and then starting a cooling water circulation device arranged in the water cooling pad; (2) in a protective atmosphere, instructing a welding robot to perform four-gate welding at the upper end of the weld groove; (3) taking off the water cooling pad, and instructing the welding robot to perform four-gate welding at the lower end of the weld groove in the protective atmosphere. The method of using the robot for automatic welding of the forged coupler yokes has the advantages that labor intensity is remarkably relieved, welding labor hours are reduced, back gouging is not needed, weld testing acceptability is guaranteed, and welding materials are saved.

The invention relates to a calculator circuit structure for realizing solar cell power supply automatic switching. The calculator circuit structure comprises: a voltage comparator, wherein a first input end of the voltage comparator is connected with a solar cell of a calculator, and a second input end is connected with a dry cell of the calculator; a power switch, used for selecting the solar cell or the dry cell to supply power to the calculator according to a comparison result output by the voltage comparator; and a voltage stabilizer, connected between the power supply output end of the power switch and the power input end of a load of the calculator. With the adoption of the calculator circuit structure for realizing solar cell power supply automatic switching, three functional modules of the voltage comparator, the power switch and the voltage stabilizer are combined together, so that the functions of voltage comparison, voltage source selection and voltage stabilization during dual-power input can be achieved; and a relatively stable working voltage can be provided for a circuit through the voltage stabilizer, so that the circuit can be better ensured to work stably. Therefore, the calculator circuit structure has a wider application range.

The invention discloses a zinc-air battery pack capable of being assembled conveniently. Compared with the prior art, the zinc-air battery pack overcomes the defects that the battery replacement speed is low and the battery replacement is inconvenient. The zinc-air battery pack disclosed by the invention comprises an A-type battery (10), a B-type battery (11) and a current collector (3), wherein the A-type battery (10) is formed by putting an air pole (5) on the upper part of a battery jar (2) flatwise and spreading calamine cream (1) on the air pole through a diaphragm (4); the lower part of the current collector (3) is provided with a copper claw (8); the B-type battery (11) is formed by connecting the lower part of the A-type battery (10) with the current collector (3) by using a double-pole connector (9); the B-type battery (11) is installed on the calamine cream (1) of the A-type battery (10) through the copper claw (8); and the current collector (3) is installed on the calamine cream (1) of the B-type battery through the copper claw (8). According to the invention, the replacement speed of a zinc-air battery is increased, and the problem of reduction of battery efficiency caused when the welding is poor is solved.