3446results about "Hollow articles" patented technology

The invention relates to the technical field of part manufacturing, in particular to a hollow non-straight section composite part which is characterized in that a low-melting-point alloy is used for manufacturing a core mold to serve as a forming inner mold, fiber prepreg is laid on the surface of the core mold and subjected to curing treatment to form a shell structure, finally, the inner mold is removed in a melting mode, and the hollow non-straight section composite part is obtained. According to the hollow non-straight composite material part manufacturing method, the characteristic that materials can be controllably removed is utilized, the mold design is greatly simplified, the manufacturing cost is reduced, and meanwhile the forming freedom degree of a complex geometric structure is improved.

The invention discloses a full-circle needle beam trolley and method based on compressed air energy storage and relates to the technical field of tunnel construction, the full-circle needle beam trolley comprises a needle beam assembly, and supporting legs are arranged at the bottoms of the front end and the rear end of the needle beam assembly; the template assembly is arranged outside the needle beam assembly in the front-back direction of the needle beam assembly, and the template assembly at least comprises a first template group and a second template group; the beam frame assembly is arranged on the outer side of the needle beam assembly, and a supporting piece is arranged between the beam frame assembly and the template assembly so as to connect the beam frame assembly and the template assembly; guide mechanisms are arranged at the front end and the rear end of the needle beam assembly, so that the beam frame assembly drives the supporting piece and the template assembly to slide forwards and backwards along the needle beam assembly under the traction of the guide mechanisms. According to the embodiment of the invention, modular trolley, closed-loop sensing and automatic welding / grouting are realized, template positioning and welding seam and grouting quality are ensured, and leakage and reworking risks are reduced.

The invention discloses a flexible inflatable material and a preparation method thereof, and belongs to the field of flexible inflatable materials. According to the method, by analyzing a model, forming a wire drawing hole in a removable supporting mold and combining a dotted single-knot type, through end point type and row-column sectional type specific wire drawing process, the arrangement of interval wires of the flexible inflatable material is comprehensively adjustable in position, length and pre-tightening force, and the structural adaptability and stability are improved; through in-situ glue brushing, film forming and sealing, the flexible inflatable material is uniform in sealing and stacking, not prone to leakage, not prone to wrinkling, not prone to secondary deformation and not prone to layering. The method can be used for preparing the high-pressure and high-shape-preserving special-shaped flexible inflatable material, and the shape preserving precision of the flexible inflatable material in a complex mechanical environment is improved.

The invention provides an intelligent control method and system for the spinning forming thickness of a tank. According to the method, a spinning tank surface thickness fluctuation signal is collected, and a thickness gradient tensor is generated through time sequence decomposition; extracting a thickness fluctuation intensity value in the tensor and a time sequence lag amount of thickness change of adjacent points to calculate a phase deviation feature; based on the characteristics, the curvature of a laser scanning lens on an annular spinning roller is dynamically adjusted, and a three-dimensional wall thickness cloud picture for identifying the thickness abnormal area is output through focusing and scanning of the tank body; a spinning roller motion track is obtained, thickness change-track space deviation is calculated by associating the thickness abnormal area with the phase deviation characteristics, and a track compensation vector is generated; and according to the vector, a spinning roller feeding path is dynamically optimized, and wall thickness fluctuation caused by material springback is inhibited. Dynamic wave suppression of the wall thickness of the spinning tank is achieved, thickness fluctuation is compressed, and the rejection rate is reduced.

A later forming device for unscrewing covers is improved on the basis of an existing rack, a driving mechanism, a plurality of machining tools, a feeding mechanism and the like and further comprises a conveying mechanism which is driven by a main motor through a transmission mechanism and can operate intermittently, and the conveying mechanism comprises a plurality of conveying wheels and conveying belts wound on the conveying wheels. A plurality of through holes allowing unscrewing cover blanks to be located are sequentially formed in the conveying belt in the length direction, one section of the conveying belt can be laid on the table top, and the feeding hole and the machining holes in the table top correspond to the corresponding through holes in the section of the conveying belt in the stalling state in the vertical direction; and meanwhile, a discharging mechanism is further arranged and located below the table top, and the machined unscrewing cover finished product located on the conveying belt can be separated from the conveying belt. By the adoption of the structure, the accuracy and reliability of feeding and jacking operation rhythms can be guaranteed, intermittent operation can be achieved through the conveying belt, unscrewing cover blanks can be conveyed, and the whole structure is simple and easy to adjust, control and implement.

The invention relates to the field of hollow blow molding, and discloses extrusion hollow blow molding equipment which comprises a bottom plate, a blow molding structure is arranged on the right side of the upper surface of the bottom plate, vertical plates are fastened to the middles of the front side and the rear side of the bottom plate through bolts, and two sets of forming molds are arranged between the two vertical plates through a first overturning structure. The material taking structure is arranged on the left side of the upper face of the bottom plate, under the action of the driving structure, the first overturning structure is driven to conduct overturning switching on the two sets of molds, in this way, after blow molding is conducted in one set of molds, the other set of molds can be switched in time to continue blow molding, operation is more labor-saving and convenient, and the working efficiency is greatly improved.

A pre-bending and hemming device for machining a metal inner container of a commercial dryer relates to the technical field of metal bending and machining and comprises an integrated electric cabinet, a square machining table is welded to the upper surface of the integrated electric cabinet, and a pre-bending assembly, a hemming assembly and an edge pressing assembly are arranged on the square machining table; a positioning and clamping assembly is further arranged on the square machining table. The problems that in the traditional technology, in the machining process of a metal inner container of a commercial dryer, the metal edge is sharp, and potential safety hazards exist are solved; a traditional manual or semi-automatic hemming process is low in efficiency, unstable in quality and poor in consistency. The problems that multiple procedures such as pre-bending, edge curling and edge pressing are dispersed, so that the production process is complex, surface damage is easily caused by multiple times of clamping and positioning of a workpiece, and efficient, automatic and continuous production is difficult to achieve are solved.

Described herein is an aluminium alloy multi-layered brazing sheet product for brazing in an inert-gas atmosphere without a flux that includes a core layer made of a 3xxx alloy that includes <0.2 wt. % Mg, and that provides a covering clad layer that includes 2-6 wt. % Si on one or both sides of said 3xxx alloy core layer and a Al—Si brazing clad layer that includes 7-13 wt. % Si positioned between the 3xxx alloy core layer and the covering clad layer, wherein the covering clad layer has a thickness X1 and the Al—Si brazing clad layer has a thickness X2 and wherein X2≥2X1. Also described herein is the use of an aluminium alloy multi-layered brazing sheet product in a flux-free controlled atmosphere brazing (CAB) operation to produce a heat exchanger apparatus.

The invention relates to the technical field of blow molding machines, in particular to an intelligent bottle body blow molding machine based on the Internet of Things, comprising: a bottle preparation module for performing blow molding on a bottle blank to prepare a finished bottle; the data storage module is used for storing a reference cooling curve; comprising a temperature acquisition unit for acquiring the temperature of a plurality of detection points of the prepared bottle and a wall thickness acquisition unit for acquiring the wall thickness values of the detection points; the control module is used for judging whether the preparation of the bottle meets a preset standard or not according to the cooling uniformity characterization value of the bottle and the cooling curve coincidence characterization value of the bottle; and the adjusting module is used for determining a processing strategy according to the wall thickness distribution standard deviation of the bottle. The preparation efficiency of the bottle is improved.

The invention discloses an antibacterial sanitary towel packaging bag and a preparation method thereof. The antibacterial sanitary towel packaging bag comprises a base material layer, an antibacterial layer and a leakage-proof layer. The base material layer is prepared by blending modified polylactic acid, polybutylene adipate and the like and contains a degradation accelerant; the antibacterial layer contains antibacterial peptide-loaded nano montmorillonite, chitosan and the like, and loofah sponge fiber enhances slow release; and the leakage-proof layer is an ethylene-vinyl acetate copolymer and modified silicon dioxide blended film and is provided with breathable micropores. The preparation method comprises the steps of forming the base material layer, coating the antibacterial layer and the like, and process parameters of each layer are accurately controlled. According to the packaging bag, through cooperation of three layers, the bacteriostasis rate of the packaging bag on escherichia coli and staphylococcus aureus in 24 hours is higher than 99%, the degradation rate of the packaging bag in 83 days is higher than 88%, the oxygen permeability is 4.5-5.2 cm < 3 > / (m224h 0.1 MPa), and the packaging bag has the advantages of long-acting antibiosis, air permeability, leakage prevention, environmental protection, degradation and good mechanical properties, and meets the storage and use requirements of sanitary napkins.

The utility model provides a hot-melt welding device for forming a box by using a hollow plate, which comprises a rack provided with a working surface and a cross beam, a box plate positioning strip is arranged on the working surface, and the cross beam is erected above the working surface; the hot melting guide-in plate is provided with a guide-in opening which is opened towards the left side, is used for supporting one side of the boxboard, and is arranged below the cross beam through a first connecting frame; the hot air gun is connected with the beam through a moving mechanism, and the heating end of the hot air gun enters or exits from the hot melting position through up-and-down and left-and-right movement; the front pressing wheel set and the rear pressing wheel set are used for conveying the boxboards and pressing the hot-melted boxboards correspondingly. The device is simple in overall structure, low in maintenance cost and high in hot melting welding efficiency; and the conveying and welding stability of the boxboards is improved.

The invention discloses a plastic hollow plate shaping and cooling device and method, and belongs to the technical field of plastic hollow plate processing.The plastic hollow plate shaping and cooling device comprises a processing table, and a vacuum adsorption control system and an air floatation supporting control system are arranged at the two ends in the processing table respectively; two cooling mold mechanisms used for cooling the plastic hollow plate are arranged at the two ends of the top of the machining table, and a main cooling mechanism and an auxiliary cooling mechanism which are used for cooling are arranged on each of two molds of each cooling mold mechanism. Uniform negative pressure is formed through the vacuum grooves and the vacuum holes in the upper mold, a plate is forced to be attached to the cavity so as to guarantee the section shape, the lower mold forms air film support through the air injection grooves and the air injection micropores, the downward pulling force of vacuum adsorption and the gravity of the plate are counteracted, sliding friction between the plate and the lower mold is converted into gas lubrication friction, and the service life of the plate is prolonged. The problems that in a traditional shaping process, due to the fact that single-side adsorption force is too large, the top of a plate protrudes, and a hollow cavity collapses are solved.

An assembly and method for preparing a pipe elbow for welding. The assembly has a cone clamping sleeve assembly adapted to be inserted into an end of the pipe elbow and a faceplate assembly removably affixed to the cone clamping sleeve assembly. The cone clamping sleeve assembly has a face at one end thereof. The face has at least one locating hole and at least one screw hole. The faceplate assembly has at least one locating pin receivable by the locating hole of the cone clamping sleeve assembly. The faceplate assembly has a captive screw threadedly received by the screw hole. The faceplate assembly has at least a pair of centering pins positioned at diametrically opposed locations on a faceplate. The centering pins are radially adjustable and adapted to bear against an inner diameter of the end of the elbow.

A pull tab for a container lid includes a nose configured to apply downward pressure on a frangible region of the container lid, a rivet receiving portion adjacent to the nose that includes a rivet aperture therethrough, a lift portion located distally from the nose, and a finger hole located in proximity to the lift portion. Side edges of the finger hole include one or more upward bends, placed such that the lift portion is elevated relative to a bottom plane of the pull tab, thereby facilitating user actuation of the pull tab and enabling efficient stacking of a plurality of the container lids during manufacturing thereof to facilitate shipment and storage thereof. An indentation formed in the container lid cooperative with the lift portion provides additional grasping space. Novel methods of manufacturing are also disclosed.

The anti-static ton barrel comprises a barrel body of a multi-layer structure, the multi-layer structure sequentially comprises an inner layer, a functional layer and an outer layer from inside to outside, and the thickness of the inner layer is 1-2 mm; the functional layer is a composite conductive layer taking polyethylene as a matrix, and double conductive networks are integrated in the functional layer; the dual-conductive network comprises a conductive network and conductive master batches, and the dual-conductive network can always maintain operation of at least one conductive mechanism; the outer layer comprises a layer structure, the tail end of the contact penetrates through the outer layer to be connected with the functional layer, the contact is electrically connected with a collector ring through a flexible copper foil or a braided wire, and the collector ring is connected with a grounding port outside the barrel body through a shielding wire; and it is ensured that the ton barrel can adapt to various working conditions when transporting high-purity electronic chemicals or pharmaceuticals, rapid static dissipation is continuously provided, and therefore the operation safety and efficiency are improved.

The invention relates to a pressure tank for installation in a gas-driven vehicle for storing gas and to a method for producing a pressure tank or a preform of a pressure tank, the pressure tank having a rotationally symmetrical, longitudinally extending shape which is cylindrical in the middle region and which is closed at both ends with curved pole caps, the pressure tank has a tank wall, which encloses a cavity for storing gas, and a metal coupling, so-called boss, on each pole cap, the tank wall comprising a reinforcement layer made of a fiber-reinforced plastic and an inner sealing gasket, and wherein the pressure tank has a hollow space for storing gas, and a metal coupling, so-called boss, on each pole cap, and wherein the pressure tank has a hollow space for storing gas, and wherein the pressure tank has a hollow space for storing gas, and a metal coupling, so-called boss, on each pole cap. According to the invention, there is a bushing which is connected to the boss part, the pressure ring and the spring element for sealing in such a way that the spring element is supported on the bushing and the pressure ring is pressed onto the gasket and thus the gasket is pressed in the region on the boss part.

The invention discloses a wind power tower drum circular seam automatic welding device and a welding method, and relates to the technical field of welding devices, each bottom supporting frame is provided with a rotating mechanism, a supporting seat is placed at the bottom of a circular seam between two adjacent wind power tower drums, a welding mechanism is arranged on a sliding plate, and a position adjusting mechanism is arranged on the sliding plate; the situation that the rotating speed of the two wind power tower drums is not constant in the rotating process can occur, a rotating speed sensor on a rotating disc detects the rotating speed of an abutting iron wheel, the rotating speed sensor sends rotating speed information to a controller, when the wind power tower drums rotate too slowly, a sliding plate advances on an arc-shaped supporting frame, and when the wind power tower drums rotate too fast, the sliding plate moves forwards on the arc-shaped supporting frame. The sliding plate retreats on the arc-shaped supporting frame, the welding mechanism is kept to conduct constant-speed welding on the circular seam between the two adjacent wind power tower barrels, the particle scaling powder can evenly cover a molten pool, molten slag flows smoothly, air can be isolated, oxidation can be prevented, impurities can effectively float out, air holes are reduced, and the compactness of the welding seam is improved.

The invention relates to the technical field of household appliance production and manufacturing, in particular to a washing machine inner barrel forming machine integrating edge folding, rounding and seam buckling, an edge folding machine is arranged on the right side of a feeding roller, a rounding and seam buckling machine is arranged on the upper side of the edge folding machine, a discharging roller is arranged on the front side of the edge folding machine, and a hydraulic station is arranged on the rear side of the rounding and seam buckling machine; the hydraulic station is communicated with an external electric control system, the feeding roller comprises a first rack, and a plurality of roller bodies are arranged in the first rack. The automatic edge folding machine mainly aims at solving the problems that edge folding, rounding and sewing of an inner barrel of a washing machine are completed through an independent special machine, and manual feeding and discharging are needed; by organically combining a conveying roller, a hydraulic system, a pneumatic system, a mold and a linear guide rail, a set of integrated forming equipment is designed, edge folding, rounding and sewing work of the washing machine inner barrel can be completed at the same time, manual respective feeding and discharging are not needed, meanwhile, inner barrels of various models and specifications can be produced, automatic and rapid switching is achieved, and intelligent production is achieved.

The invention discloses a forming device and method for a hydrogen storage bottle with a hydrogen-resistant inner container, and relates to the technical field of hydrogen storage bottle forming, in particular to a rolling mechanism arranged on the bottom surface of a cross beam of an arch frame and used for rolling a bottle body and a bottle neck of an aluminum alloy bottle body, and a supporting mechanism used for supporting the bottle body is arranged on the table top of a machine table. A support located on the right side of the supporting mechanism is fixedly arranged at the right end of the machine table, and a vertically-upward laser welding head is fixedly arranged in the support. The left side wall of the arch-shaped frame is provided with a tool and a driving mechanism, wherein the tool and the driving mechanism are used for positioning the aluminum alloy bottle body, assembling the aluminum alloy bottle body and the hydrogen-resistant inner container together and driving the aluminum alloy bottle body and the hydrogen-resistant inner container to rotate synchronously. The top wall and the bottom wall of the rotating base are each provided with a holding assembly, and an inner supporting assembly is arranged between the top wall and the bottom wall of the rotating base. The hydrogen storage bottle forming device has the beneficial effects that the hydrogen storage bottle forming efficiency is greatly improved, and the hydrogen storage bottle forming quality is greatly improved.

A can lid shell 10 includes a panel section 11 having a circular peripheral edge, a countersink section 12 formed and recessed along the peripheral edge of the panel section 11, a chuck wall section 13 rising from an edge of the countersink section 12, and a flange section 14 protruding from an upper end of the chuck wall section 13. The countersink section 12 includes a first curved surface portion 123C that is convex toward an internal space SP1. The chuck wall section 13 includes a second curved surface portion 131 that is connected to the first curved surface portion 123C and that is concave toward the internal space SP1. Furthermore, the second curved surface portion 131 and the first curved surface portion 123C are formed to be thicker as both are directed from an edge p8 on the flange section 14 side to an edge p6 on the panel section 11 side.

The invention discloses a film coating process and equipment in a narrow-mouth container, and relates to the technical field of paper container preparation, and the equipment comprises a film coating system, a mold closing system, a vacuum system, a heating system, an adjusting system and a control system. The polylactic acid air bag is adopted as a film covering raw material, so that the produced paper-plastic product has biodegradability, the produced product can be naturally degraded, and the problems that the paper-plastic product is difficult to recycle and treat are solved. According to the invention, the polylactic acid air bag is attached to the inner wall of the molded pulp container by directly utilizing the characteristic that polylactic acid becomes soft and generates colloid after being heated, so that the influence on the volume of the container can be reduced as much as possible, and the environment-friendly characteristic is better. The environment-friendly characteristic and the physical and mechanical properties of the paper mold can be obviously improved, and the application range of the paper mold is expanded. By optimizing and innovating a film laminating process and equipment, a more environment-friendly liquid container can be prepared, and the development and the use of the paper pulp molded container are more in line with the requirements of sustainable development.

Disclosed is a secondary battery capable of improving sealing performance of a cell housing part including a case and a cap plate. The secondary battery includes an electrode assembly, including first and second electrode plates and a separator, a case accommodating the electrode assembly and electrically connected to the second electrode plate, a terminal mounted to the case configured to be electrically connected to the first electrode plate, a cap plate sealing an open top of the case, and a second gasket interposed between the case and the cap plate. The case includes a beading portion depressed inward and a crimping portion bent inward. A forming curvature calculated based on a bending amount of the crimping portion and a covering length of the crimping portion is different from a support strain calculated based on a depression depth of the beading portion and a cover overlapping length of the crimping portion.

A forming mould for forming three-dimensional cellulose products from an air-formed cellulose blank structure. The forming mould includes a first mould part and a second mould part. The first mould part and the second mould part are movable relative to each other in a pressing direction and arranged to be pressed relative to each other during forming of the cellulose products. The first mould part includes a movable element displaceable between an extended state and a retracted state, where the movable element in the extended state is arranged as a protruding body extending in the pressing direction relative to a surrounding pressing surface of the first mould part. The movable element is in the retracted state arranged as a pressing surface cooperating with the surrounding pressing surface for forming the cellulose products.

The invention provides a cylindrical part differential temperature thinning deep drawing die and a forming method, and relates to the technical field of thinning deep drawing. A female die is provided with a first sub-cavity with the horizontal diameter gradually reduced, so that the side wall of a cylindrical blank is gradually thinned in the axial direction in the deep drawing process, meanwhile, the female die and the cylindrical blank are integrally heated through a heating part, and the cylindrical blank is heated through a second sub-cavity with the horizontal diameter gradually reduced; the material fluidity is enhanced, plastic deformation is facilitated, the plasticity of the material is ensured, the bottom and the side wall of the barrel-shaped blank subjected to deep drawing are locally cooled through the cooling component, the flow stress is improved, the material strength is improved, excessive thinning is restrained, therefore, the wall thickness distribution of the barrel-shaped part is effectively controlled, and the defect risk in the forming process is reduced; and the size precision and the product quality of the cylindrical part are improved.

The invention discloses a plastic bottle one-step full-servo injection molding device and a plastic bottle one-step full-servo injection molding method, and particularly relates to the technical field of injection molding equipment. Comprising a rack, a fixed mold, a movable mold, a female mold, an injection port, a male mold, an injection cylinder, a metering injection unit, a communication seat, a cylindrical part, a fixed cylinder, an injection sleeve, a shrinkage cylinder, an injection nozzle, a deformation joint, a taper hole and a pressure relief unit, and the pressure relief unit is used for driving the injection sleeve to move in the fixed cylinder. According to the injection mold, when the pressure of plastic melt in the communication base is large, the pressure relief unit is triggered to act, the pressure relief unit drives the injection sleeve to move in the direction away from the fixed mold, then the shrinkage barrel is separated from the state that the shrinkage barrel is extruded by the taper hole, the shrinkage barrel is converted into elastic expansion deformation from original elastic shrinkage deformation, and then the opening portion of an injection nozzle of the shrinkage barrel is expanded; the injection pressure of plastic melt is reduced, large impact on the surface of a female die or a male die is avoided, and meanwhile the pressure loss phenomenon is reduced.

The invention discloses a tank body assembling and welding device, and relates to the technical field of welding equipment, the assembling device comprises a left assembling clamping mechanism and a right assembling clamping mechanism, the left assembling clamping mechanism and the right assembling clamping mechanism are arranged on a base and are oppositely distributed, and each assembling clamping mechanism comprises a sliding clamping seat arranged on the base; the sliding clamping bases are driven by a clamping power unit arranged on the base to be arranged in a sliding mode, end socket clamps used for clamping end sockets are arranged at the close ends of the two sliding clamping bases, and the two end socket clamps clamp the end sockets to be close to each other to be assembled with the barrel. The assembling and jacking mechanism is arranged on the base and located between the two assembling and clamping mechanisms, and the assembling and jacking mechanism is used for supporting and jacking the barrel, so that the barrel is aligned with the sealing heads at the two ends of the barrel; the welding device comprises a pre-welding mechanism and a welding mechanism and is used for welding the end socket and the barrel which are assembled. Therefore, the problem of tank body welding in the prior art is solved, the tank body welding efficiency is improved, the welding quality is improved, the labor intensity is relieved, and the labor cost is reduced.

The invention belongs to the technical field of intelligent manufacturing of plastic packaging containers, and particularly discloses an intelligent blow molding and wall thickness closed-loop control system for PET plastic bottles, which integrates feedforward correction and closed-loop feedback, pre-corrects process parameters by acquiring characteristic parameters of raw materials, and generates point cloud data in combination with full-circumferential scanning of a non-contact three-dimensional optical measurement device. A partition three-dimensional model is constructed, and the wall thickness is accurately calculated; and based on the wall thickness deviation data, blow molding process parameters are dynamically adjusted through the mapping relation database, and a grading quality control strategy, a multivariable self-adaptive feedback mechanism and an online incremental learning mechanism are configured. The system realizes self-adaptive compensation under working conditions of raw material fluctuation, environmental disturbance and the like, improves wall thickness control precision and product consistency, reduces manual intervention, ensures high-speed continuous production, has self-learning and long-term stable regulation and control capabilities, and provides technical support for light-weight and high-precision forming of PET bottles.

A three-dimensional vapor chamber assembly structure includes a housing, heat pipes, a capillary member and a working fluid. The housing includes a first housing plate and a second housing plate, a cavity formed between the first and second housing plates, and through holes formed on the second housing plate. The heat pipe penetrates through the through holes and includes an open end having a flange formed thereon. The flange includes lateral and longitudinal surfaces. The lateral surface of the flange is attached to the second housing plate via a welding layer, and the longitudinal surface of the flange is attached to the second housing plate via a welding product. The capillary member is arranged inside the cavity and attached to the housing. The working fluid is arranged inside the cavity. Accordingly, a firm and robust vapor chamber structure capable of preventing welding material from entering the cavity is achieved.

The invention discloses a vacuum cup with a metal shell and an inner container directly compounded and a preparation method. The vacuum cup comprises a metal shell, an inorganic non-metal inner container and a transition layer located at openings of the metal shell and the inorganic non-metal inner container. The transition layer is at least one of a metal transition layer, a metal solder transition layer or a glass solder transition layer, the thermal expansion coefficient of the transition layer is between the thermal expansion coefficient of the metal shell and the thermal expansion coefficient of the inner container, and the thermal expansion coefficient meets the metal shell gt; a transition layer gt; an inorganic nonmetal liner; when the transition layer is a metal transition layer, the relative difference K between the transition layer and the thermal expansion coefficient of the metal shell is less than 60%; when the transition layer is a metal solder or glass solder transition layer, K is less than 20%; the total thickness of the transition layer is smaller than 1 mm. By reasonably controlling the material and thermal expansion coefficient of the transition layer, a middle structure with a deformation inhibition function is formed, thermal expansion deformation of the metal shell is relieved, the welding stress is reduced, the cracking risk is reduced, and reliable and direct compounding of the metal shell and the inorganic nonmetal inner container is achieved.

The invention relates to the technical field of radiator welding, and particularly discloses a welding device for an engineering machinery radiator. Comprising a circular concave shell, the outer side of the circular concave shell is sleeved with and rotationally connected with a first annular electric sliding rail, the outer side of the first annular electric sliding rail is fixedly connected with an auxiliary driving assembly, the top of the first annular electric sliding rail is fixedly connected with a correction angle block, the inner side of the circular concave shell is fixedly connected with an arc-shaped grinding block, and an arc-shaped through hole is formed in the inner side of the circular concave shell; according to the welding device for the engineering machinery radiator, the two round concave shells are used for conducting inner clamping type fixing on the end portions of the main pipe from the two ends of the main pipe, and the situation that when branch pipe butt welding operation is conducted on the main pipe, the main pipe shakes and deflects due to the influence of external force, and the welding effect is affected is prevented; the arc-shaped grinding blocks are arranged on the inner wall of the circular concave shell to grind and flatten the end face of the pre-fixed main pipe, and the situation that the butt welding effect of the branch pipes is affected due to the fact that the end face of the main pipe is uneven when the main pipe is fixed and is integrally in an inclined state is avoided.