4results about How to "Effective deformation control" patented technology

The invention discloses a processing method for controlling carburizing and quenching deformation of a thin-wall sleeve gear, which is characterized in that the thin-wall sleeve gear is slowly cooled along with a furnace in a vacuum environment after carburizing, deformation caused by thermal stress is favorably reduced, and then a solid carburizer is adopted for boxing protection, so that no oxidation and no decarburization of parts can be ensured; the part which is expanded after being heated is quickly sleeved into the cold-state quenching mold to restrain the free shrinkage of the part, so that the quenching deformation can be effectively controlled, and the dimensional stability of the part after being quenched is ensured; after the part is cooled to the room temperature, cooling continues, heat preservation is conducted for preset time, then air cooling is conducted, residual austenite can be reduced, and the hardness and abrasion resistance of the carburized surface are improved; and finally, the thin-wall sleeve gear is subjected to air cooling after low-temperature heating and heat preservation for preset time, quenching internal stress can be reduced, and brittleness is reduced. According to the method, carburizing and quenching deformation of the thin-wall sleeve tooth is remarkably reduced, the stability of the machining size of the part is improved, the wall thickness of the part does not need to be thickened, machining deformation is reduced, and the machining quality of the part is improved.

This utility model relates to the field of battery welding technology, specifically a laser welding expansion fixture for large-section thin-walled cavity battery shells for electric bicycles. It mainly includes a worktable, a top clamping device, side clamping devices, and an expansion device. The worktable is welded from a tabletop and several square tubes. The expansion device is fixed to the center of the tabletop, the top clamping device is fixed to the four corners of the tabletop on the outside of the expansion device, and the side clamping devices are fixed to the four opposite sides of the tabletop. This utility model, through the triple synergy of internal expansion, side clamping, and top clamping, comprehensively controls structural deformation during the welding process. It also employs a staged welding process in conjunction with the fixture to achieve minimal deformation welding, effectively solving the deformation control problem in laser welding of large-section thin-walled cavity battery shells. This not only improves welding quality and production efficiency but also provides technical reference for welding similar thin-walled components, showing broad application prospects in the battery manufacturing field.

The invention relates to a clamping method for stabilizing a weak-rigidity cantilever part, the weak-rigidity cantilever part is provided with a fixing part and a cantilever part, the fixing part can be fixed on a machining plane, and the cantilever part is suspended relative to the machining plane; according to the clamping method, a wedge-shaped supporting block and a dial indicator are used, the bottom of the wedge-shaped supporting block can horizontally move and slide on the machining plane, the wedge-shaped supporting block can be fixed on the machining plane when moving to a proper position, the upper portion of the wedge-shaped supporting block is an inclined face, and an included angle larger than zero degree is formed between the inclined face and the horizontal plane. The method is not limited by materials and structures of the cantilever parts, can be applied to most of the cantilever parts, is particularly good in use effect on machining of cantilever weak-rigidity parts on aero-engines, successfully solves the problems of deformation and chattering of the cantilever parts in the machining process through application of the method, and is good in application effect, low in implementation cost and suitable for popularization and application. The application range is wide and operation is convenient.

The invention belongs to the field of underground space development, and relates to a deformation control method for implementing foundation pit engineering by a reverse construction method, which comprises the following steps of: firstly, constructing a foundation pit support structure, temporary support side columns and middle support piles, and sequentially excavating a foundation pit to be below each layer of reverse construction beam plate to construct the reverse construction beam plate and an outer wall hidden beam; supporting plate structures are arranged on the periphery of the top-down beam plate and used for placing servo jacks in the later period; an inner structure edge beam is arranged on the periphery of the top-down structure beam plate and is connected with the temporary supporting edge column; a servo jack is installed between a reversed structure beam plate and an outer wall hidden beam, and jacking force is applied, so that deformation of an enclosure structure is reduced. The deformation of the foundation pit is controlled, the influence of excavation construction of the foundation pit on surrounding buildings and structures and an underground pipe network is reduced, and the method plays an important role in urban renewal construction projects.