41results about How to "Reduce the difficulty of welding operation" patented technology

The invention discloses a welding method of a low alloy steel plate and a ship plate and relates to the technical field of welding. According to the welding method, through analysis and experiment, stipulates that grooves and surfaces of welding materials are subjected to dust cleaning before the two dissimilar steel boards are welded, wherein a weld width between the steel boards is less than 1mm; the back face of a slab joint is subjected to positioned welding with gas shielded welding, so that the positions of striking arc are full and arc suppression positions are filled with arc craters; welding is carried out with small specifications, multi-layer and multi-pass welding can be realized, and weld joints on each face are subjected to backing welding and cosmetic welding; for the slab joint, carbon arc gouging is adopted to machine the grooves, and the angle of the grooves is 60-70 degrees; the grooves are ground; a welding part and the both sides of the welding part are baked for dehumidification through a cutting torch before welding; the temperature of a weld joint layer and the inter-pass temperature are controlled to be below 100 DEG C. With the adoption of the welding method, the problems that by the conventional welding method for low alloy steel plates and ship steel plates, the welding production rate is low, the whole weld is poor in quality, and a welding structure is large in transformation can be solved.

The invention relates to the field of building of nuclear power stations, in particular to a method for welding a butt joint formed by assembling large thick wall pipelines in a nuclear power station, and provides a method for welding a butt joint of large thick wall pipelines of a nuclear power station to lower welding difficulty and improve the welding efficiency and effect. The outer diameter of the large thick wall pipelines ranges from 450 mm to 1,100 mm, the pipe wall thickness ranges from 30 mm to 100 mm, and the pipelines are assembled to form an assembling clearance gradually increased from the 0-degree position of the butt joint to the 180-degree position of the butt joint. Back argon shielding is carried out in the welding process. Melt welding is carried out to form a penetration weld bead, and welding current is gradually increased. Support welding is carried out to form a plurality of supporting weld beads, and bottoming welding is completed. Filling welding is carried out, and when the root width of weld seams is smaller than or equal to 10 mm, single-layer and single-weld-bead welding is adopted. When the root width of the weld seams is larger than 10 mm, single-layer and multi-weld-bead welding is adopted till filling welding is completed. Covering welding is carried out to form a covering weld bead, and welding is finished. The welding method is low in operation difficulty, good in welding effect and high in efficiency.

The invention is suitable for the field of LED lamp production equipment and discloses a machining locating device for LED light-emitting plates. The machining locating device is used for locking and locating the LED light-emitting plates with first limiting grooves formed in the outer side walls in a protruding mode during machining. The machining locating device comprises a base, a locating plate, a locking assembly and limiting posts, wherein the base is used for being connected with a workbench, the locating plate is arranged on the base, the locking assembly is used for locking and fixing the locating plate to the base, and the limiting posts are used for locking the LED light-emitting plates to the locating plate; at least one locating hole used for containing the LED light-emitting plates is formed in the locating plate in a spaced mode, the inner side wall of each locating hole is provided with a second limiting groove in a protruding mode, each second limiting groove and the corresponding first limiting groove are used for forming a limiting hole in an enclosed mode, and the limiting posts are fixed in the limiting holes in an inserted mode. When a wire welding sequence is conducted, the machining locating device is adopted for locking and locating the LED light-emitting plates, so the work fatigue degree of production staff can be lowered, wire welding efficiency is improved, and welding quality of wires on the LED light-emitting plates is guaranteed.

The invention discloses a doorsill type workpiece welding fixture. The doorsill type workpiece welding fixture comprises a base, a first rotating arm and a second rotating arm, wherein a first pressing head is fixed to the base; the first rotating arm is pivoted to the base, and a first support block, a second support block and a third support block are fixed to the inner side of the first rotating arm in sequence from bottom to top; and the second rotating arm is pivoted to one end, which is far from the base, of the first rotating arm, and a second pressing head, a third pressing head, a fourth pressing head and a fifth pressing head are fixed to the inner side of the second rotating arm. Compared with the prior art, the doorsill type workpiece welding fixture has the advantages that five pressing points are set, wherein three pressing points act on a doorsill, two pressing points act on a floor assembly, and a plurality of pressing points are realized on the welding fixture, so that the doorsill can be effectively fixed, additionally, the floor assembly is assisted to be pressed, the welding stability of the whole assembly is increased, the structure of the welding fixture is simple, and the welding space is enough, so that the welding operation difficulty of employees is greatly reduced.

The invention discloses a wheel cover assembly clamp which comprises a support, a lower portion positioning unit, a side face pressing unit, a rear portion pressing unit, a front end positioning unit and a main positioning unit. The support is connected with a sliding unit, wherein the sliding unit is used for guiding the support to move towards or away from a wheel cover assembly. The lower portion positioning unit is used for positioning and pressing the lower portion of the wheel cover assembly. The side face pressing unit is used for pressing the lap joint part of the wheel cover assembly and a longitudinal assembly. The rear portion pressing unit is used for positioning and pressing a front surrounding plate when the front surrounding plate is in lap joint with the wheel cover assembly. The front end positioning unit is used for positioning the front end of the wheel cover assembly. The main positioning unit is used for positioning a body of the wheel cover assembly. Compared with the prior art, multiple clamp basic units are integrated on the support to form a large unit, the problem that excessive clamp basic units are directly connected with a base plate, and consequently the space of the base plate is not sufficient is avoided, large welding space is reserved, and the welding operation difficulty is lowered.

The invention discloses a welding method and structure for a motor end ring and conducting bars. The welding structure comprises the end ring and the conducting bars. The welding structure is characterized in that grooves which are in one-to-one correspondence to the conducting bars are processed in the end surface of the end ring according to the dimensions of the end parts of the conducting bars, wherein the conducting bars and the grooves are correspondingly welded on the end ring. The welding structure reduces area of grooves in the end ring, and welding flux is limited in a single grooveduring welding, so that melting and curing of the welding flux in a welding process are guaranteed to be always limited in single groove, dosage of sliver brazing filler metal and soldering flux can be effectively reduced, welding cost is reduced, the conducting bars are guaranteed to be uniformly spaced and distributed in the peripheral direction of the end ring, the welding positions of the conducting bars are positioned simply and clearly, distance regulating does not need to be manually performed, welding operation difficulty is effectively reduced, and welding efficiency and welding quality for the end ring and the conducting bars is improved.

The invention discloses a joint of a concrete filled steel tubular column. The joint comprises an upper steel pipe column and a lower steel pipe column which are vertically arranged, a U-shaped steel beam is horizontally arranged on the side wall of the lower steel pipe column, an open groove is formed in the side wall of the lower steel pipe column and corresponds to the steel beam, the open groove extends downwards from the upper end of the lower steel pipe column, the two sides of the open groove respectively form a connecting end, one end of the steel beam penetrates through the open groove, extends into the lower steel pipe column and is fixedly connected with the lower steel pipe column; a connecting plate is vertically arranged in the steel beam, and the connecting plate is fixedly connected with the steel beam; and the lower end of the upper steel pipe column is fixedly connected with the upper end of the upper steel pipe column. According to the joint, the joint of the steel pipe column and the steel beam is reinforced from the inside through the connecting plate, so that the appearance of the junction of the steel pipe column and the steel beam is smooth; and a standardized component inner sleeving process is adopted, adopted components, the steel pipe column and the steel beam can be installed in a factory, the production process and the installation process are convenient and fast, and a new thought is provided for the development direction of prefabricated buildings.

The invention belongs to the technical field of welding materials, and particularly relates to an iron-based core flux-coated electrode free of pre-welding drying and easy to weld. The iron-based coreflux-coated electrode comprises an iron-based core, a coating and a polyaniline protective film, wherein the coating wraps the periphery of a welding section of the iron-based core, and the polyaniline protective film wraps the exposed part of the iron-based core and the outer surface of the coating. The polyaniline protective film comprises the following components in percentage by mass: 6%-10%of nano copper wires treated by a coupling agent, 12.5%-15.5% of carbon fibers treated by the coupling agent, 20%-36% of conductive polyaniline treated by the coupling agent, 0.8%-1.5% of lanthanum and/or cerium, 8%-10% of a curing agent and the balance of epoxy resin. The flux-coated electrode does not need to be dried before welding, arc striking is easy in the welding process, electric arcs arestable in the welding process, and the obtained weld joint is high in mechanical property. The flux-coated electrode disclosed by the invention is an innovation in the aspect of flux-coated electrodes.

The invention discloses a welding process of a titanium alloy graphite backing. The welding process comprises a step 1 of designing and fabricating a graphite welding backing fixture according to a titanium alloy welded structure, a step 2 of performing drying and degassing treatments on the graphite welding backing fixture, a step 3 of assembling the graphite welding backing fixture in an inner cavity of titanium alloy welded structure part, a step 4 of carrying out welding, and a step 5 of crushing the graphite welding backing fixture after welding and taking out graphite fragments, and then finishing the welding process of the titanium alloy graphite backing. The welding process of the titanium alloy graphite backing is applicable to the welding of one side welding forced back shaping of complex and special-shaped titanium alloy structures, and capable of improving a back shaping effect.

The invention discloses a method for manufacturing a motor mounting bracket. The method comprises the following steps of: 1) preparing a support bottom plate; 2) preparing a bracket; 3) assembling andfixing the bracket; 4) assembling and fixing the support bottom plate; and 5) assembling and fixing the support bottom plate and the bracket. The motor mounting bracket is firm and reliable in structure, and the stability of a motor after being mounted is effectively improved; the whole motor mounting bracket is assembled by the support bottom plate and the bracket, and auxiliary positioning welding is carried out for welding of all parts of the bracket by adopting an auxiliary device, so that accurate positioning adjustment between an arc-shaped plate and end plates at two sides is effectively guaranteed, and the actual welding accuracy and quality are improved; all components of the support bottom plate are accurately positioned through blocks and grooves and then welded and fixed in amatched manner, so that the structural strength of the support bottom plate is guaranteed; and finally the bracket and the support bottom plate are combined and welded, so that the structural stability of the whole motor mounting bracket is effectively ensured, and the use performance of the motor mounting bracket is better.

The invention discloses a novel steel pipe concrete column combined joint and a construction method thereof. The novel steel pipe concrete column combined joint comprises an upper steel pipe column, a lower steel pipe column and a plurality of U-shaped steel beams, wherein the upper steel pipe column and the lower steel pipe column are vertically arranged; an open groove is formed in the side wall of the lower steel pipe column and extends downwards from the upper end of the lower steel pipe column, and the two sides of the open groove form connecting ends correspondingly; one end of each steel beam penetrates through the open groove, then extends into the lower steel pipe column and is connected with a vertically-arranged end plate; the two sides of the end plate are fixedly connected with the connecting ends on the two sides of the open groove; the upper steel pipe column is located above the lower steel pipe column, and the lower end of the upper steel pipe column is fixedly connected with the upper end of the upper steel pipe column; and meanwhile, the upper steel pipe column is fixedly connected with the end plate. According to the novel steel pipe concrete column combined joint and the construction method thereof, the end plate is used for reinforcing the joint of the steel pipe columns and the steel beams from the interior, and a reinforcing component is arranged at the joint for further reinforcing, so that the appearance of the joint of the steel pipe columns and the steel beams is smooth, and redundant decoration construction is not needed; and meanwhile, the reinforcing effect of the reinforcing component on the joint is better, and the safety of the joint is higher.

The invention provides a non-overturning welding method for a steel arch box and a non-overturning welding steel box arch. The non-overturning welding method comprises the following steps: formulating a scheme, designing a welding groove, testing a welding process, optimizing and perfecting the welding groove, welding and assembling the steel arch box, and inspecting the welding groove. Welding manufacturing of the steel box arch is achieved; meanwhile, the improved welding groove design is adopted, upward welding is changed into downward welding, and the technical problems that labor, time and labor are wasted, the safety risk is large, the site is limited, and the equipment investment is too large during steel box arch overturning welding are solved; and on-site overturning-free all-position welding operation of the steel box arch is achieved, and the purposes of reducing cost, improving efficiency, reducing safety risks, reducing welding difficulty and improving welding quality are achieved.

The invention provides an installation method of an umbrella-shaped roof structure, aims at solving the technical problems that an existing installation construction method is inconvenient due to the fact that the umbrella-shaped roof structure is complex in shape, large in component number, large in high-altitude splicing difficulty and high in precision requirement, and relates to the technical field of construction of large space structures of constructional engineering. An umbrella-shaped roof is divided into 20-30 umbrella-shaped unit structures, the adjacent umbrella-shaped unit structures are connected into a whole through long-strip-shaped wave-shaped roof steel beams, and the installation method comprises the following steps of (1) performing modular assembly on the ground; (2) installing a temporary support; (3) performing hoisting in units; and (4) dismantling the temporary support and monitoring structural deformation: unloading a sandbox support, dismantling the temporary support and monitoring the structural deformation. According to the installation method, the construction period is effectively shortened, the construction precision is improved, and meanwhile the installation quality of other related structures attached to the umbrella-shaped roof structure is improved.

The invention discloses a construction method of a stainless steel cladding top plate of a building water tank. The construction method comprises the following steps that S1, a prefabricated floor slab with a stainless steel cladding is prefabricated in a factory; S2, the prefabricated floor slab is installed on a bracket at the top of the water tank wall, a second stainless steel covering face is arranged at the top of the bracket, and a first stainless steel covering face and the second stainless steel covering face are connected in a sealed mode; and S3, a concrete overlapping layer is poured at the top of the prefabricated floor slab, so that the water tank top plate with the stainless steel covering face is formed. The invention further discloses the building water tank. Construction is convenient, the construction workload is small, the cost is low, and the construction quality is guaranteed.

The present invention provides an in-vivo detection apparatus and system based on a flexible tube. The apparatus includes: a detection component, a main circuit board, a detection circuit board, an auxiliary circuit board, a cable, and an outer tube. A first conducting material is disposed on a first side surface of the detection circuit board, the detection component is connected to the first side surface of the detection circuit board, a wiring terminal of the detection component is welded to the first conducting material, a second conducting material is disposed on a second side surface of the detection circuit board, the second side surface of the detection circuit board is connected to a second edge of the main circuit board, and the second conducting material is perpendicularly welded to a conductive portion on a surface of the main circuit board. Each auxiliary circuit board is connected to one first edge, and a channel for at least a part of the instrument tube to pass through is formed between two auxiliary circuit boards. Based on the present invention, welding strength and reliability can be effectively improved when a packaging size is limited.