7results about How to "Reduce printing time" patented technology

The invention relates to a medical high polymer material 3D intelligent printing method based on a selective laser sintering process. The method comprises the following steps that optimal initial process parameters are recommended based on material characteristics and part requirements; carrying out processing according to the optimal initial process parameters, and monitoring a processing material in real time through a sensor; if machining defects are monitored, an AI model is adopted to calculate and adjust technological parameters, and meanwhile, local repair is carried out on the detected defects; after printing of each layer is completed, the technological parameter database is updated, and technological parameters of subsequent layers are optimized until the machining process is finished; in the printing process, once defects are monitored, the AI model can quickly calculate and adjust process parameters, manual intervention is not needed, and the time for finding and solving problems is greatly shortened; meanwhile, the reinforcement learning algorithm can continuously learn and optimize a process parameter adjustment strategy, so that adjustment is more accurate and efficient, and repeated printing and repair time caused by unreasonable parameters are reduced.

This invention relates to a method for controlling the surface accuracy of elliptical thin-walled compartments in additive manufacturing, belonging to the field of additive manufacturing technology. Addressing the challenges of surface control in additive manufacturing and post-processing of elliptical thin-walled compartments, this invention proposes a surface accuracy control method based on an internally supported dimensional structure. This method includes steps such as additive manufacturing model design of the elliptical compartment and its internally supported dimensional structure, integrated additive design, thermal processing, machining, and removal of the internally supported dimensional structure. The method applies the control of the internally supported dimensional structure extension used in additive manufacturing to the post-processing stage, achieving full-process surface control from additive manufacturing to post-processing, saving product manufacturing time and improving the overall efficiency of additive manufacturing.

This invention belongs to the field of laser additive manufacturing technology, specifically relating to a dual-spot parallel scanning additive manufacturing system and method. A laser generation unit dynamically distributes a laser beam to the first and second optical paths according to a preset energy ratio through polarization beam splitting. The spot generation unit uses two spatial light modulators to modulate the two beams into patterned spots and dot spots respectively. The filtering and imaging unit filters and images the two beams. The parallel scanning unit drives the dual spots to scan synchronously on a powder bed. The control unit performs model slicing and patterned region segmentation, and dynamically allocates energy and synchronously controls all units to work together based on the segmentation results. This achieves a single laser, dual optical paths, irregularly shaped spots, and parallel scanning, simultaneously balancing processing efficiency and forming accuracy, effectively solving the technical problem of traditional single-spot methods that struggle to achieve both efficiency and accuracy.

The invention belongs to the technical field of low-pressure casting, and particularly relates to a low-pressure casting device and method for a large-size aluminum alloy shell metal outer mold composite sand core, the height of a large-size aluminum alloy shell casting is not lower than 600 mm, the inner diameter is not lower than 700 mm, and the average wall thickness is 14-20 mm; the low-pressure casting device comprises a mold system, a sand core system, a pouring system, a chilling block system and a dead head, the pouring system adopts a bottom pouring and stepped pouring mode, the structure of the pouring system is designed according to the height, the transverse characteristic size and the average wall thickness of a casting, the pouring system is deeply optimized, and the casting quality is improved. By adopting the design mode of multiple sprues and circumferentially and uniformly distributed transverse sprues, it is ensured that a feeding channel is solidified later than a casting, the pressure maintaining pressure is continuous and effective, the casting defects of cold shut, air holes, shrinkage cavities, shrinkage porosity and the like are avoided, the mechanical property and air tightness of the large-size casting are remarkably improved, and the cost rate is increased.

The utility model discloses 3D printing equipment utilizing line laser or surface laser for scanning. The 3D printing equipment comprises a sealing cavity, a laser emission head, a light path adjusting box, a forming electric cylinder, a powder supply electric cylinder and a powder laying scraping strip. A powder supply cavity and a forming cavity are formed in the sealing cavity; the laser emission head emits line laser or surface laser; a light inlet of the light path adjusting box is connected with the transmitting end of the laser transmitting head, and a light outlet of the light path adjusting box extends into the sealing cavity and corresponds to the forming cavity. The forming electric cylinder is located below the exterior of the forming cavity, and a forming piston plate is arranged at the moving end of the forming electric cylinder and arranged in the forming cavity. The powder supply electric cylinder is located below the exterior of the powder supply cavity, and a powder supply piston plate is arranged at the movable end of the powder supply electric cylinder and arranged in the powder supply cavity. And the powder spreading scraping strip is arranged at the tops of the powder supply cavity and the forming cavity. According to the 3D printing equipment, the printing time can be shortened, and the printing efficiency is improved.

This invention relates to a support structure for additive manufacturing of elliptical thin-walled compartment sections, belonging to the field of additive manufacturing technology for thin-walled compartment sections. Addressing the challenges of shape control in additive manufacturing and post-processing of elliptical thin-walled compartment sections, this invention proposes a multi-layered support structure design. This support structure employs a combination of a cylindrical internal support structure, ribs, and thin-plate supports, providing layered internal support and shaping for the elliptical thin-walled compartment section. This transforms the unstable elliptical cross-sectional structure into a stable approximately circular, triangular, or rhomboid cross-sectional structure, ensuring the support structure's stability and enabling effective control of deformation during additive manufacturing and post-processing of the elliptical thin-walled compartment, thereby improving the overall efficiency of additive manufacturing.

This invention discloses a method for generating multi-axis unsupported printing trajectories based on curve discretization, including steps such as: importing an initial support model, segmenting the support model, editing the bottom and top, rotating and slicing the intermediate rotating layer, merging path points, and generating a complete GCode file. Combined with a multi-axis 3D printer, it can achieve unsupported printing of models with overhanging structures, reduce support printing time, save material consumption and post-processing steps, and improve surface quality.