84 results about "Undermatching" patented technology

The invention discloses a head pressing tool for laser welding of a square battery cell module, and relates to the technical field of electronic manufacturing and laser machining, the head pressing tool comprises a base, an output groove is formed in the top of the base, a groove is formed in the top of the base, and a limiting groove is formed in the top of the base; a pressure head device, a clamping device and an auxiliary device are arranged at the top of the base, automatic input is achieved through the pressure head device, it can be guaranteed that the positions and the directions of all modules are consistent in the production process, personal errors are reduced, the consistency and the quality of products are improved, and in the laser welding or other machining processes, the production efficiency is improved. The module may be affected by heat, pressure or mechanical force, if the upper portion is not fixed, the module may move or vibrate, poor welding or mismatching of parts may be caused, the movement can be reduced through upper portion fixing, and the stability of the machining process is ensured.

The invention discloses a welding material for preparing an aluminum-steel gradient structure. The welding material comprises alloy powder for laser cladding and an aluminum-based welding wire for CMT welding. The alloy powder for laser cladding comprises the following components in percentage by mass: 20.0%-30.0% of Zn powder, 20.0%-30.0% of Cu powder, 5.0%-10.0% of Si powder, 5.0%-10.0% of Sn powder and the balance of Al, the aluminum-based welding wire for CMT welding comprises powder and a welding skin, and the powder comprises, by mass, 20.0%-30.0% of Zn powder, 20.0%-30.0% of Ag powder, 10.0%-20.0% of Cu powder, 5.0%-10.0% of Si powder, 5.0%-9.0% of Mg powder and the balance Al powder. The structure solves the problems of cracking and poor performance caused by mismatching of thermal physical properties and brittle phases of an aluminum-steel dissimilar structure. The invention further provides a laser and CMT composite preparation method of the aluminum-steel gradient structure.

The invention relates to 785MPa-grade easily-welded rare earth steel and a preparation method thereof, belongs to the technical field of easily-welded rare earth steel, and solves the problems that in the prior art, the strength and toughness of high-strength steel are not matched, and the welding performance is poor. The invention provides 785MPa-grade easily-welded rare earth steel which comprises the following components in percentage by mass: 0.03 to 0.06 percent of C, 0.20 to 0.40 percent of Si, 0.08 to 1.20 percent of Mn, less than or equal to 0.005 percent of P, less than or equal to 0.005 percent of S, more than 0 and less than or equal to 0.03 percent of Als, 2.50 to 4.00 percent of Ni, 0.5 to 1.0 percent of Cr, 0.5 to 0.8 percent of Mo, 1.00 to 1.70 percent of Cu, 0.025 to 0.041 percent of Nb, 0.01 to 0.03 percent of Ti, 0.0025 to 0.0060 percent of N, 0.003 to 0.007 percent of Ce and the balance of Fe and inevitable impurity elements. According to the easily-welded rare earth steel, matching of strength and toughness is achieved, the tensile strength Rm of a prepared steel plate is larger than or equal to 898 MPa, the yield strength Rp0.2 is larger than or equal to 800 MPa, the percentage elongation after fracture is larger than or equal to 21%, the percentage reduction of area is larger than or equal to 70%, the Charpy impact V-shaped opening impact energy at the temperature of-84 DEG C is larger than or equal to 189 J, and the welding performance is excellent.

The invention belongs to the technical field of steelmaking production scheduling, and provides a steelmaking production scheduling method and system based on digital twinning and a medium. According to the method, a continuous casting billet digital twin body is constructed, dynamic coupling analysis is conducted on cutting action and roller way conveying, and the matching performance of cutting and hot charging rhythms is judged; aiming at the mismatching condition, calculating the backlog driving force by utilizing a car-following model, and activating a dynamic buffer area in combination with a state intensity-spatial distance model; the casting blank temperature drop rate is corrected based on the heat transfer theory and the thermal radiation physical field model, and the hot charging fitness is evaluated; and establishing a space-time constraint scheduling model, and dynamically optimizing casting blank generation scheduling. The system comprises a matching identification module, a buffer establishment module, a hot charging analysis module, an adaptation analysis module and a rhythm adjustment module. According to the scheme, the continuous casting billet cutting is matched with the hot charging rhythm, and the hot charging fitness and the production efficiency are improved.

The invention relates to the technical field of steel structure construction, and particularly discloses a large steel structure truss lifting and sliding system which comprises eight specific implementation processes, a steel structure lifting device and a steel structure sliding device are adopted, and through the core design of overall lifting of a steel structure truss and high-altitude sliding conversion of the steel structure truss, the large steel structure truss can be lifted. The problem of support mismatching in the prior art is solved. The method is mainly suitable for complex engineering scenes such as large-span steel structure venues and high-speed rail stations.

The invention discloses a welding machining method, device and equipment and a storage medium, and relates to the technical field of welding machining.The welding machining method comprises the steps that the size deviation type of a current workpiece to be welded is obtained; wherein the size deviation type comprises at least one of gap deviation, hole position deviation and assembly dislocation deviation; the size deviation value of the current to-be-welded workpiece is determined according to the size deviation type; determining a power compensation value mapped by the size deviation value based on a preset mapping relation; determining an actual power value according to a preset power value and the power compensation value; and when the current workpiece to be welded is welded, the actual power value is applied. By means of the mode, the welding power can be matched with the specific size deviation of the workpiece in real time, the quality problems of overburning, insufficient fusion depth and the like caused by parameter mismatching are avoided, and the stability and consistency of the welding bead quality are improved.

The present application belongs to the technical field of steelmaking production scheduling, and provides a steelmaking production scheduling method and system based on digital twinning and a medium. The method dynamically couples and analyzes cutting action and roller conveying by constructing a continuous casting billet digital twin, judges the matching of cutting and hot charging rhythm, calculates the backlog driving force by using a car-following model for the mismatching case, activates a dynamic buffer zone in combination with a state intensity-space distance model, corrects the casting billet temperature drop rate based on a heat transfer and thermal radiation physical field model, evaluates the hot charging adaptability, establishes a time-space constraint scheduling model, and dynamically optimizes the continuous casting billet generation scheduling. The system comprises a matching identification module, a buffer establishment module, a hot charging analysis module, an adaptability analysis module, and a rhythm adjustment module. The scheme realizes the matching of continuous casting billet cutting and hot charging rhythm, and improves the hot charging adaptability and production efficiency.

The laser filler wire welding in-situ self-learning closed-loop control method for the Fe-Cr-A1 special-shaped component comprises the steps that information of a component to be welded and weld joint characteristics are obtained, and an initial welding program is generated; a multiband composite laser is adopted for welding, meanwhile, welding seam characteristics are monitored, and the wire feeding speed is adjusted in real time; spectral signals and weld pool visual image signals in the welding process are synchronously collected in real time, the current welding defect probability is obtained, and the welding speed is adjusted in real time; and the total laser power is adjusted in real time according to the real-time molten pool temperature and the laser incident angle. The method can effectively solve the problems that the welding track of the special-shaped component is difficult to manually program, welding deformation causes a welding seam gap, and the wire feeding speed is not matched with preset welding process parameters.

A repair welding segment detection method includes generating, based on a result of the inspection determination, shape mismatch data obtained by extracting a shape mismatch portion of the weld bead, dividing the shape mismatch data into N, where N is an integer of 2 or more, equally divided windows in a direction perpendicular to a welding direction of the weld bead, setting a shift region formed by i, where i: an integer of 1 or more, continuous windows among the N windows, separately calculating volumes of (N−i+1) shift regions obtained by shifting one by one the i windows forming the shift region in the welding direction, and determining that a shift region having a volume of a predetermined value or more among the calculated volumes of the (N−i+1) respective shift regions is a defective segment of the weld bead.

A grouting metal corrugated pipe with key teeth for steel bar anchoring comprises a corrugated pipe body and the key teeth located at wave troughs of the outer wall of the corrugated pipe body. The bottom of the corrugated pipe main body is closed, the top of the corrugated pipe main body is open, the opening is used for inserting a reinforcing steel bar extending from an adjacent connecting component, and the reinforcing steel bar inserted into the opening and the corrugated pipe main body form reliable anchoring through a grouting material; the key teeth are in a semi-conical shape, a double-semi-conical shape or a semi-cylindrical shape; the key teeth and the corrugated pipe main body are connected together through integral casting processing, welding or a connecting piece; when the corrugated pipe structure with the key teeth is used for grouting corrugated pipe connection, the bonding and anchoring performance of the corrugated pipe and common concrete can be improved, the problem of stress concentration is effectively solved, the anchoring length of the corrugated pipe is reduced, and the problem that when high-performance grouting materials are used, the service life of the corrugated pipe is prolonged is solved. And in addition, the structure and the method are simple in process, and the arrangement position is flexible.

The application relates to the technical field of electric arc welding, in particular to a welding device for trolley part machining, which comprises a welding table and a supporting column fixedly installed on the top of the welding table, an active seat is arranged above the supporting column, an elastic unit matched with the active seat is installed on the supporting column, an electric arc welding gun is penetrated through the active seat, a locking piece matched with the active seat is installed on the electric arc welding gun, a synchronous frame used for contacting the end of a contrast group pipe is arranged above the supporting column, the movement of the electric arc welding gun is not controlled by a preset program, but is directly driven by the solid outline of the contrast group pipe through a mechanical mechanism, the risk that the programmed track does not match the actual workpiece is completely avoided, the real-time accurate coincidence of the welding track of the electric arc welding gun and the joint of the workpiece is guaranteed, so that the heating center of the electric arc does not deviate from the joint, and the heat can uniformly act on the two side pipe fittings.

The invention relates to the technical field of solder, in particular to a solder composition and a preparation method and application thereof, and the solder composition comprises a first alloy and a second alloy; the first alloy comprises the following components in percentage by weight: 65-78% of Sn, 18-30% of In and 2-5% of Ag; and the second alloy comprises the following components in percentage by weight: 94-97% of Sn, 2-7% of Ag and the balance of Cu. The solder composition has double melting behaviors before reflow and has high solidus temperature after reflow, so that the problem of hot cracking caused by mismatching of coefficient of thermal expansion (CTE) among a substrate, a package and a welding spot is solved, and the solder composition is suitable for high-reliability electronic packages including BGA, CSP and flip chip assemblies.

The application discloses a welding material for preparing a copper-stainless steel gradient structure, which comprises a welding material for preparing a near-stainless steel transition layer and a welding material for preparing a near-copper transition layer; the material is specially used for solving the forming difference and the steel-side penetration cracking problem caused by the thermal physical property mismatch during the connection of the copper-steel dissimilar structures. The application further discloses a CMT preparation method for the copper-stainless steel gradient structure by using the welding material for preparing the copper-stainless steel gradient structure.

The invention discloses an assembly method for preventing thermal mismatch of a device. The assembly method comprises the following steps: carrying out modification treatment on the surface of a welding surface of the device; carrying out modification treatment on the surface of the printed board bonding pad; performing solder paste printing processing on a central bonding pad and a target pin bonding pad of the printed board; correspondingly placing the welding surface of the device and a printed board bonding pad, and realizing interconnection between the device and the printed board through reflow soldering; welding the residual pins of the device and the residual bonding pads of the printed board to complete fixation of the residual pins of the device and the residual bonding pads of the printed board; and reinforcing the part between the device and the printed board. Through modification treatment, rasterization steel mesh printing, step-by-step welding and corner reinforcing design on the surface of the device and a printed board bonding pad, stress concentration caused by mismatching of thermal expansion coefficients of the device and the printed board can be effectively relieved, welding spot cracks and failure risks are reduced, and therefore the installation reliability of the device in the long-term application process is improved.

The utility model relates to a substrate and a PCBA board. The substrate is provided with a plurality of bonding pad parts, the bonding pad parts are arranged around a preset central area at intervals, and each bonding pad part sequentially comprises a first bonding pad section, a second bonding pad section and a third bonding pad section; the first bonding pad section and the second bonding pad section of each bonding pad part are used for adaptively welding a first adapter, and the second bonding pad section and the third bonding pad section of each bonding pad part are used for adaptively welding a second adapter. Therefore, the first bonding pad section and the second bonding pad section of each bonding pad part are combined to form a first composite bonding pad with a smaller size, so as to adapt to a first adapter with a smaller welding size; and the second bonding pad section and the third bonding pad section of each bonding pad part are combined to form a second composite bonding pad with a larger size so as to be adaptive to a second adaptive part with a larger welding size, so that the risks of defects such as component pulling deviation, difficulty in controlling the height of the welding flux, missing soldering or false soldering and the like caused by mismatching of the size of the bonding pad and the amount of the welding flux are greatly reduced, the welding quality is greatly improved, and the production cost is reduced. And the process requirements can be better met.

This invention discloses a real-time detection method and system for steel slag flow based on a triaxial accelerometer, belonging to the field of steel metallurgical process detection technology. It acquires triaxial vibration data to fully capture the impact energy of steel slag in any direction in three-dimensional space, overcoming the signal loss problem caused by the mismatch between the installation direction and the impact direction of traditional single-axis sensors. Based on this, a dynamic threshold pre-screening mechanism is adopted, requiring only the calculation of a few core features to quickly determine the slag-free state. For suspected slag-containing periods, a CNN-LSTM hybrid model is further used for fine identification. The model automatically extracts the nonlinear combinations and temporal dependencies between feature dimensions, achieving accurate classification of four states: initial flow, stable slag flow, and impact of large slag pieces. This invention integrates comprehensive perception, efficient prediction, and intelligent identification, providing a safe, reliable, and low-cost online detection and classification control solution for steel slag flow in the steelmaking process.

The present invention provides a method for relieving stress release in a ceramic packaging process, which belongs to the field of ceramic packaging technology, and includes a chassis, a ceramic body arranged on the chassis, and a wall arranged on the chassis, wherein the ceramic body is placed at one end of the chassis, and one end of the wall is provided with an opening for arranging the ceramic body, and one end of the wall connected to the ceramic body and the chassis is provided with a stress relief groove extending along the joint, and the stress relief groove is arranged on the inner wall surface of the wall, and the stress relief groove is close to the inner wall of the ceramic body and the chassis and coincides with the contact surface of the ceramic body and the chassis, and the groove bottom of the stress relief groove is lower than the inner wall surface of the wall. The method for relieving stress release in a ceramic packaging process provided by the present invention adds a stress relief groove at a sensitive position where the wall is welded to the ceramic part and the chassis, and absorbs part of the residual stress by accumulating solder, so that the ceramic stress point is away from the structural weak point, thereby alleviating the failure caused by the mismatch of thermal expansion coefficients during the packaging process of ceramic and metal parts.

The present invention belongs to the field of building construction technology, and specifically relates to a steel mesh formwork component, an LP wall and a construction process thereof, wherein the steel mesh formwork component comprises a standard section component and an overlap section component, wherein the standard section component and the overlap section component are vertically spliced ​​to form an integral steel mesh formwork component; the standard section component comprises a first steel bar assembly, a plurality of first clamping pieces welded inside the first steel bar assembly, and a first mold net fixed at both ends of the first clamping piece; the center spacing of adjacent first clamping pieces is the required modulus; the overlap section component comprises a second steel bar assembly, a plurality of second clamping pieces welded inside the second steel bar assembly, and a second mold net fixed at both ends of the second clamping piece, wherein the center spacing of adjacent second clamping pieces, part of the spacing is the required modulus, and part of the spacing is adjusted according to the total height of the wall. The present invention eliminates the mismatch between the steel mesh modulus and the building elevation through the overlap section component, and can achieve precise control of the building elevation.

The invention discloses an optimization method for welding equipment and a process of a steel annealing and pickling production line. The optimization method comprises the following steps: S1, adopting pure Ar gas as welding shielding gas; s2, replacing a large-diameter protective nozzle; s3, a gas screen is additionally arranged at a protective gas outlet of the welding gun, and a protective net is additionally arranged in the gas screen; s4, the push-pull type wire feeding mechanism is replaced; s5, process parameters of welding equipment are adjusted; and S6, the steel is connected with the titanium material, so that the special connecting band is formed. By improving the welding equipment and optimizing the welding process, the problems of titanium material MIG welding air suction brittle failure, unsmooth wire feeding, parameter mismatching, dissimilar material connection failure and the like are solved, it is ensured that the welding seam quality meets the subsequent annealing and pickling procedure requirement, the welding efficiency adapts to the continuous operation rhythm of a production line, and it is ensured that titanium materials can be produced in batches.

According to the preparation method of the 2.5 D packaging structure provided by the invention, in the process of preparing the 2.5 D packaging structure, the large-size substrate is directly and electrically connected with the rewiring layer, so that compared with a traditional technological process of packaging first and then carrying out substrate mounting, the warping problem of a high-performance and large-size chip packaging structure can be effectively solved, and the reliability of the packaging structure is improved. The problem of pseudo soldering caused by mismatching of thermal expansion coefficients is avoided; according to the preparation method of the 2.5 D packaging structure, the three supporting substrates are respectively and simultaneously subjected to process operation and then combined through bonding, so that the electrical connection quality can be improved, the process time can be effectively shortened, the process yield can be improved, and the thermal stress accumulation problem of the process structure can be improved.

The present application belongs to the technical field of combustion chamber flame tube structure, and particularly relates to a non-metallic composite material combustion chamber flame tube based on elastic connecting structure, which adopts various elastic connecting structures between the inner and outer rings of the non-metallic composite material flame tube and the head ring of the metal material flame tube, changes the thermal matching deformation into elastic matching, has good thermal expansion matching performance, good sealing performance and assembly performance, can maintain good sealing performance under hot state, and effectively reduces the flame tube air leakage problem caused by the mismatch of thermal expansion amount. The elastic connecting structure of the inner and outer rings of the flame tube can effectively disperse the axial and circumferential stress, reduce the stress concentration of the non-metallic composite material, reduce the risk of damage caused by uneven stress of the matrix, and increase the service life of the non-metallic material flame tube. Meanwhile, the present application also has split structure design, which can effectively improve the maintainability of the flame tube, reduce the maintenance cost, and has high engineering application value.

This invention relates to the field of box welding technology, specifically to an explosion-proof control box welding equipment, including a base and a robotic arm, wire feeding module, clamping module, and wire cleaning and cutting module mounted on the base. The robotic arm has a support plate with a fixed pipe fixed to it. Each end of the fixed pipe has a positioning mechanism for clamping the welding wire. A bidirectional lead screw is rotatably mounted on one side of the support plate, and two movable blocks symmetrically connected to the lead screw are threaded onto it. Clamping force is provided by a cylindrical spring, and the compression of the spring automatically matches the thickness of the welding wire. This avoids the problem of mismatch between the welding wire thickness and the clamping force, preventing thinner welding wires from developing indentations, scratches, or even plastic deformation due to excessive clamping force, and preventing thicker welding wires from slipping or experiencing wire feeding speed fluctuations due to insufficient clamping force, thus ensuring welding effect and final product quality.

The utility model provides an assembly type operation platform fixed to the lower portion of a steel column bracket and used for steel structure construction. The assembly type operation platform comprises four side frames, four bottom frames and bottom plates, wherein every two side frames are oppositely arranged, the four bottom frames are arranged at the bottom ends of the four side frames respectively, and the bottom plates are arranged at the upper ends of the four bottom frames. The four side frames are arranged around the outer surface of the steel structure square column and are connected with one another through connecting pieces; the four bottom frames are arranged around the outer surface of the steel structure square column and are connected in an inserted mode, and limiting openings matched with the steel structure square column are formed. The four side frames and the four bottom frames are matched with the sizes of columns of various models under the action of the connecting pieces, size mismatching does not need to be worried about, modular structural design is adopted for the platform, rapid assembly and disassembly are achieved, a stable auxiliary operation platform is formed, and the operation efficiency is improved. Therefore, the construction efficiency is greatly improved.

The invention provides a method for ceramic-steel efficient diffusion bonding and synchronous preparation of metal-based ceramic, and belongs to the technical field of welding. The method comprises the following steps that Al powder, Ti powder and B2O3 powder are mixed and then subjected to ball milling, and intermediate layer powder is obtained; mixing ceramic powder, a binder and an active component, and performing secondary ball milling to obtain a metal-based ceramic precursor; and sequentially assembling a base material, the intermediate powder and the metal-based ceramic precursor from bottom to top into a layered structure to obtain an assembly, and sequentially carrying out cold pressing pretreatment, hot pressing diffusion bonding and cooling on the assembly to obtain the metal-based ceramic. Smooth transition of thermal expansion coefficients is achieved through the middle transition layer, residual stress caused by mismatching of the thermal expansion coefficients of ceramic and steel is effectively restrained in cooperation with an optimized control cooling system, and long-term service reliability of the connector under the thermal cycle condition is guaranteed.

According to the 2.5 D packaging structure and the preparation method thereof provided by the invention, in the process of preparing the 2.5 D packaging structure, the large-size substrate is directly and electrically connected with the rewiring layer, so that compared with a traditional technological process of packaging first and then carrying out substrate mounting, the warping problem of a high-performance and large-size chip packaging structure can be effectively solved, and the reliability of the packaging structure is improved. The problem of pseudo soldering caused by mismatching of thermal expansion coefficients is avoided; according to the 2.5 D packaging structure and the preparation method thereof, the two supporting substrates are respectively and simultaneously subjected to process operation, and then are combined through bonding, so that the electrical connection quality can be improved, the process time can be effectively shortened, the process yield can be improved, and the thermal stress accumulation problem of the process structure can be improved.

A laser welding device and method for a cross-shaped spiral core filling rod and a cross-shaped end plug aim at achieving reliable connection of a special-shaped thin-wall cladding and the end plug, and the device comprises a welding clamp, a front tool, a stepped cross-shaped front end plug, a cross-shaped spiral simulation fuel rod, a stepped cross-shaped rear end plug and a rear tool. The rear end of the cross-shaped spiral simulation fuel rod is connected with the rear tool through a stepped cross-shaped rear end plug; the front end of the cross-shaped spiral simulation fuel rod is connected with the rear end of the stepped cross-shaped front end plug, and the front end of the stepped cross-shaped front end plug is connected with the welding clamp through the front tool. The welding method adopts step-by-step spot welding: firstly fixing the front end plug, and rotating a welding clamp to perform spot welding for four times; the same process is repeated for rear end plug welding; according to the method, the welding seam with narrow welding seam, high surplus height and good air tightness can be formed on the thin-walled tube, the phenomenon that the thin-walled tube is easy to burn through during welding due to mismatching of assembly gaps and non-uniform solder accumulation in the welding process is avoided, and poor tightness and overlarge spacing of the welding seam in the welding process are prevented.

The invention discloses a composite insulator core rod pre-drying device, and relates to the related technical field of composite insulator core rods, the composite insulator core rod pre-drying device comprises a pre-drying oven main body and a door curtain assembly, the door curtain assembly comprises an arc-shaped groove and a liftable baffle, a sliding block is welded to the side edge of the outer wall of the liftable baffle, the sliding block is embedded in a guide rail groove, and the arc-shaped groove is formed in the side edge of the arc-shaped groove. The liftable baffle is slidably connected to the edge of the inlet and outlet of the pre-drying oven body through a guide rail, and the top end of the liftable baffle is rigidly connected with the end of a piston rod of the air cylinder through a connecting plate. The lifting baffle is driven by the air cylinder and provided with the arc-shaped groove, so that the pre-drying device is rapidly started and stopped, the problems of poor sealing performance and heat loss caused by shape mismatching of the baffle are solved, the heat preservation performance of the pre-drying oven is improved, and meanwhile, the positioning precision and operation convenience of core rod placement are improved.

The invention discloses a welding material for preparing a copper-stainless steel gradient structure. The welding material comprises a welding material for preparing a near-stainless steel side transition layer and a welding material for preparing a near-copper side transition layer, the material is specially used for solving the problems of poor forming and steel side permeation cracking caused by mismatching of thermal physical properties during connection of copper-steel dissimilar structures. The invention further discloses a CMT preparation method of the copper-stainless steel gradient structure by adopting the welding material for preparing the copper-stainless steel gradient structure.

The utility model discloses an automatic ring welding machine for a fire extinguisher cylinder, and belongs to the technical field of fire extinguisher cylinder production. Comprising a rack and a mounting table, and the rack is fixedly connected with the side face of the mounting table. The lower portion of the machine frame is connected with a barrel feeding device for fixing the direction of a barrel, the upper end of the machine frame is connected with a first sliding rail, and the first sliding rail is connected with a lifting device for driving the barrel to ascend in a sliding mode. The upper end of the rack is connected with a first electric cylinder, and an output shaft of the first electric cylinder is fixedly connected with the side face of the lifting device. The two sides of the rack are connected with an upper bottom conveying line and an M bottom conveying line, the two sides of the mounting table are connected with rotary feeding mechanisms, and the lower end of the rack is connected with an assembly feeding device. Clamping devices are connected to the two sides of the upper portion of the mounting table, and a welding gun is connected to one side of the mounting table. The problems that a feeding mechanism in the prior art is not matched, and production efficiency is low and errors are increased due to redundant steps in the prior art are solved.

The invention relates to the technical field of wear-resistant pipelines, and discloses a bimetal double-layer ceramic lining mitre elbow and a manufacturing method thereof. The manufacturing method comprises the following specific steps: 1, rolling a steel plate mesh with rhombic holes, honeycomb hexagonal holes and the like into a barrel shape, and spot-welding the steel plate mesh on the inner surface of a straight steel pipe; 2, coating an alloy coating and a first ceramic coating through a centrifugal self-propagating process; 3, a mitre elbow structure is formed through cutting and welding; 4, coating a second layer of ceramic by adopting a static self-propagating process; and 5, processing a joint welded with the straight pipe to form a transition slope. In the process, ceramic coating gaps in the pipe generated by tailor welding are filled with static self-propagating reaction products. The total thickness of the ceramic layer of the elbow is 2-3.0 times that of a straight pipe, and the inner surface roughness Ra is smaller than or equal to 1.6 microns. The problem that the service life of an elbow is not matched with that of a straight pipe is effectively solved, the abrasion resistance is improved by 3.2-3.8 times, the impact strength is improved to 42 J / cm < 2 >, the equal-life design of a pipeline system can be achieved, and the cost of the whole cycle is reduced by 52% or above.