2 results about "Wrapping procedure" patented technology

The invention discloses a manufacturing method of a 2.0 GPa grade gradient strength steel plate spring, and belongs to the technical field of automobile parts. The manufacturing method comprises rolling, straightening, punching, lug rolling, edge cutting, lug wrapping, aerosol quenching, tempering, shot blasting, paint spraying and assembling, and is characterized in that aerosol quenching comprises the following steps: (1) after the lug wrapping procedure of the steel plate spring is finished, the steel plate spring is conveyed into a heating furnace to be heated and subjected to heat preservation, and the whole steel plate spring is uniformly austenitized; (2) the steel plate spring is rapidly transferred into an aerial fog quenching device, a quenching medium is adopted for conducting local aerial fog quenching on different parts of the steel plate spring obtained after uniform austenitizing, and the cooling rate of local aerial fog quenching ranges from 0.5 DEG C / s to 60 DEG C / s; the steel plate spring has gradient strength in the length direction and the thickness direction and has a gradient structure. Non-uniform mechanical property distribution can be achieved, the strength gradient gradually changing in the length direction and the thickness direction is obtained, and meanwhile the combined performance of high strength and high toughness is obtained.

The application discloses a kind of battery cell film wrapping devices, it is related to lithium battery technical field.The battery cell film wrapping device includes bottom plate and is set on the roller assembly, constraint component and scraper assembly of bottom plate, the bottom plate is used to place battery cell, the roller assembly is used to place blue film, the constraint component is movably connected with the bottom plate, for with the side wall of battery cell resistance, to constrain battery cell, the scraper assembly is movably connected with the bottom plate, can be contacted with the blue film attached to the surface of battery cell and relative to the bottom plate moves, to flatten the blue film.The battery cell film wrapping device can realize constraint to battery cell when film wrapping, improve the yield of mechanized film wrapping operation, can also be suitable for the film wrapping procedure of different sizes of battery cell, improve the compatibility of mechanized film wrapping operation, with the advantages of high production efficiency, less rework times, low production cost.