8 results about "Roll bonding" patented technology

The present application belongs to the technical field of metal layered composite material preparation, and relates to a titanium-steel composite plate and a manufacturing method thereof. The manufacturing method comprises the following steps: removing the surface oxide layer of a steel coil through shot blasting treatment, and making the surface of the treated steel coil have a specified surface roughness; coating an intermediate plating layer on the surface of the steel coil; making the rolling bonding surface of a titanium coil and the steel coil have a specified surface roughness through shot blasting treatment; preheating the steel coil and the titanium coil; performing first composite rolling on the preheated steel coil and titanium coil; heating the composite coil after the first composite rolling to a specified temperature and keeping the temperature; performing second composite rolling on the composite coil after heating and keeping the temperature; performing martensite quenching or bainite quenching by controlling the cooling speed and temperature of the composite coil after the second composite rolling; performing flattening and / or straightening treatment on the composite coil; performing tempering treatment on the flattened and / or straightened composite coil; and coiling or slitting the composite coil after the tempering treatment.

This utility model belongs to the field of ultrasonic welding technology, specifically relating to an ultrasonic rolling welding fixture for clamping and positioning a battery cell assembly so that the battery cell tabs are located between the upper and lower welding heads of the welding machine. The fixture includes a base plate, a support mechanism, a lateral movement mechanism, a lifting mechanism, and a positioning mechanism. The lateral movement mechanism is used to adjust the horizontal position of the battery cell assembly, the lifting mechanism is used to adjust the height of the battery cell assembly, and the positioning mechanism is provided on the lifting mechanism to position the battery cell assembly so that the upper and lower welding heads can perform rolling welding on the battery cell tabs. This utility model controls the movement of the battery cell assembly through the lateral movement mechanism, ensuring that the battery cell tabs move synchronously with the upper and lower welding heads during the rolling welding process. This ensures that the weld marks on the tabs remain uniform and avoids incomplete or over-welded welds.

The application discloses a method for splicing and rolling of thin sheets of difficult-to-deform metal, wherein a sheet blank with a thickness of 2 mm or above is subjected to 5-13 passes of initial rough rolling on a four-roller or six-roller rough rolling mill by adopting a block method process, and after the thickness is reduced to less than 0.5 mm, the sheet material is not cut at the edge portion, the head and tail are each cut by 50-100 mm, and then the head and tail of a plurality of sheets are spliced and welded, the spliced and welded strip is subjected to one pass of fine rough rolling on a six-roller or twelve-roller or fourteen-roller or twenty-roller finishing mill by adopting a strip method process. The method can realize the processes of one pass of fine rough rolling, on-line edge cutting (welding seam cutting), and multi-pass fine rolling of the spliced and welded strip coil on the finishing mill under a constant roll gap; the double-side scrap edges and the welding seams do not participate in deformation, there are no welding points and welding seams in the overlapping section, and the length of the overlapping section after the rolling and composite connection can be directly used as part of the finished product without the need for post-cutting, thereby simplifying the processing flow, reducing raw material waste, and improving the yield.

The present application relates to the technical field of composite materials, and particularly relates to a degradable zinc-based composite material for biomedical stents and a preparation method thereof, which comprises the following steps: taking zinc sheets after surface cleaning, coating hydroxyapatite on the surface of the zinc sheets after surface cleaning, stacking the zinc sheets coated with hydroxyapatite and the zinc sheets without hydroxyapatite coating, and rolling the zinc sheets with hydroxyapatite inside the stack; folding the zinc sheets after each rolling pass, and then continuing to roll; repeating the folding-rolling until the desired rolling pass; and after the obtained sample is pressed into a block, performing multi-pass hot rolling, thereby obtaining the degradable zinc-based composite material for biomedical stents. The present application adopts a cumulative roll bonding preparation process, which can effectively improve the combination of hydroxyapatite and zinc, and improve the dispersity of hydroxyapatite in zinc, and can effectively refine the grains and strengthen the matrix, so as to finally obtain a zinc / hydroxyapatite composite material with uniform structure and excellent performance.

The utility model discloses a vacuum ply rolling metal composite plate sealing and air extracting device which is characterized by comprising a vacuum ply rolling box wall and a sealing and closing plate installed on the vacuum ply rolling box wall, and a vacuum air extracting end is fixedly installed on the sealing and closing plate. According to the utility model, the sealing installation assembly is correspondingly arranged at the joint of the vacuum ply rolling box wall and the sealing closing plate, secondary sealing can be realized by matching with the sealing closing plate, the disassembly and the assembly are convenient, the vacuum pumping assembly can carry out vacuum pumping operation, the sealing installation pipe and the vacuum pumping end can be sealed and fixed by the sealing fixing assembly, and the installation tightness of the connecting end is good; the two ends of the sealing fixing assembly are in auxiliary sealing connection through the two auxiliary sealing sleeves correspondingly, the air tightness of installation is further improved, the air tightness is kept, meanwhile, disassembly and assembly are easy and convenient, the airtight equipment of the device is easy and convenient to disassemble and assemble, the double airtight sealing capacity is achieved, the air tightness is excellent, and leakage is not prone to occurring.

The invention relates to the technical field of lithium metal batteries, and discloses an integrated lithium-copper composite electrode and a preparation method thereof, and the integrated lithium-copper composite electrode comprises a sandwich structure composed of a composite copper foil current collector and a lithium metal layer. The composite copper foil current collector is composed of upper and lower copper foils and a polymer base film, the tab region realizes conductive continuity through a roll welding process, and the lithium metal layer and the copper foils form a mechanical interlocking interface through a rolling process. By optimizing the structural design and process parameters, the problems of conduction continuity, welding strength and interface bonding stability are solved, light weight and high energy density are achieved, and the self-fusing safety protection function is achieved under the thermal runaway condition. The battery performance can be remarkably improved, and the method is suitable for various lithium battery systems and has important application value.

The present application relates to the technical field of metal composite plate preparation, and particularly relates to a self-riveting microstructure promoted metal composite plate rolling bonding method. The method is to preheat the stacked soft and hard metal plates, then roll and composite, and in the rolling process, the soft and hard metal plates are combined by self-riveting microstructure to realize mechanical riveting connection of the bonding surface, and form a composite plate; the composite plate is further promoted by heat treatment to realize metallurgical bonding of the bonding interface, and finally obtain a double connection interface of mechanical riveting and metallurgical bonding; the self-riveting microstructure includes a plurality of micro grooves arranged on the surface of the hard metal plate and a plurality of micro protrusions arranged on the surface of the soft metal plate, each column of micro protrusions is respectively inserted into each micro groove, and the micro groove is a necked structure, and in the rolling process, the micro protrusion is plastically deformed to fill and engage into the micro groove. The present application realizes the high-strength mechanical riveting and metallurgical bonding double-strengthened interface of the soft and hard metal composite plate, and significantly improves the comprehensive performance and reliability of the composite plate.

The invention relates to a heat exchanger, in particular in the form of a battery cooling device for an electrically driven battery module on an electric vehicle, the heat exchanger having a cooling circuit for circulating a temperature control fluid, the cooling circuit being formed between two plates which are connected to each other in regions by means of roll-bonding, the plates are integrally connected in a joining region and are widened in unconnected hollow regions to form a cooling circuit, in which flow elements, which are surrounded by flow on all sides and influence the flow of the temperature control fluid through the cooling circuit, are formed by the joining region.