122 results about "Composite fabrication" patented technology

The invention provides an electric arc additive and subtractive composite manufacturing method and device for a cross structure based on low surface roughness. The device comprises an electric arc additive manufacturing forming system, a milling and subtractive system and a three-dimensional scanning detection system. Firstly, cross structure characteristics are analyzed, an additive manufacturing program is generated through an electric arc additive manufacturing forming system, and a layer is added; secondly, the flatness S, the average height # imgabs0 #, the weld reinforcement h and the height D of each position of the formed surface are analyzed through a three-dimensional scanning detection system, and whether the flatness S exceeds a specified value or not is judged; and finally, material increasing and decreasing judgment is conducted, and if # imgabs1 # imgabs2 #, material decreasing is conducted through a milling and cutting material decreasing system. And if # imgabs3 #, additive repair welding is conducted through an electric arc additive manufacturing forming system. In combination with a three-dimensional scanning detection system, flatness feedback of the formed surface can be obtained in real time, material increasing and decreasing are conducted in time in the cross structure forming process, the roughness of the formed surface of the cross structure is effectively reduced, and the forming precision is improved.

The invention relates to the technical field of mining, in particular to a taper angle self-sharpening type high-strength mining cutting pick and a gradient manufacturing method thereof.The taper angle self-sharpening type high-strength mining cutting pick and the gradient manufacturing method thereof.The taper angle self-sharpening type high-strength mining cutting pick comprises the following steps that S1, raw materials are selected and pretreated; gradient composite manufacturing of the cone-angle self-sharpening high-strength mining cutting pick is achieved, different parts of the cutting pick adapt to specific requirements of different parts through gradient change of material performance, the abrasion resistance and impact resistance of the cutting pick are remarkably improved, in addition, the cutting edge of the cone-angle self-sharpening high-strength mining cutting pick is designed to be conical, and the cutting edge of the cone-angle self-sharpening high-strength mining cutting pick is not prone to deformation. Due to the geometrical shape, in the cutting process of the cutting pick, friction and impact can be generated between the conical edge of the cutting pick and rock, even if abrasion occurs, abrasion materials on the edge can fall off due to the dynamic effect, a new sharp edge is exposed, and due to the mechanism, the cutting pick can continuously keep efficient cutting performance under the severe working condition.

The invention discloses an additive and subtractive composite manufacturing process planning method for element runner structure features, which comprises the following steps: S1, analyzing the feature structure of a runner, optimizing the runner for additive and subtractive composite manufacturing, and splitting a multi-runner structure into a plurality of single-runner structures; s2, a machining strategy is set, namely, the single runners are machined one by one in sequence, and a single-runner additive machining strategy is machining along a centroid shaft; s3, developing a collision detection algorithm for flow channel additive and subtractive machining, and circularly solving a machining area segmentation plane by using the collision detection algorithm along a flow channel centroid shaft to obtain a flow channel additive and subtractive alternate area division scheme; s4, generating specific additional material and subtractive material processing procedures; and S5, post-processing to generate a processing code, and importing the processing code into additive and subtractive composite manufacturing equipment for processing. According to the invention, the process planning result without collision and with high processing efficiency can be quickly and efficiently obtained.

A quality control system may include a controller configured to be communicatively coupled with a monitoring assembly including one or more detectors. The controller may implement two or more AI quality control (AIQC) modules associated with two or more process steps for fabricating a composite material, where each of the two or more AIQC modules is associated with a different one of the two or more process steps. A particular AIQC module may receive monitoring data associated with the particular process step for a workpiece, generate quality control data using a particular AI model, and update the particular AI model based on testing data associated with the workpiece from one or more testing tools after at least the particular process step.

The invention discloses a metal thin-wall component additive and subtractive composite manufacturing stress and deformation prediction method and system, and the method comprises the steps: carrying out the three-dimensional modeling of a component sample and a machining tool, importing a model into finite element software, and completing the assembly of the component sample and the tool; establishing a thermal elastic-plastic constitutive equation in the material increasing process in finite element software, and setting material attributes of the component sample; finite element software is used for setting a life-death unit to simulate the material forming behavior in the actual laser cladding process; setting a moving path of the heat source between different cladding layers; calculating an additive temperature field and converting the additive temperature field into a structural unit; a geometric matrix for converting unit node displacement into node strain is obtained, and an additive stress field is obtained; additive simulation stress data are extracted and loaded; a constitutive equation is used for defining material constitutive attributes, and the number of steps and machining time of milling machining analysis are set; and setting a material failure criterion, and calculating the stress distribution and deformation of the sample by using a solver. The testing precision of the residual stress of the metal thin-wall component is improved.

The invention relates to a temperature-adjustable laser material reduction device and method.The device comprises a base, a second support, a temperature control part, a moving platform, a first support, a laser emitting part, a temperature adjusting part and the like, and the method comprises the steps of component heating, femtosecond laser material reduction machining, real-time temperature control and evaluation optimization; through the PID temperature controller and the infrared temperature detector, the temperature of the surface of the metal component can be accurately controlled, surface defects and residual stress caused by temperature fluctuation in traditional laser machining are avoided, through dynamic adjustment of laser parameters and the temperature, powder adhesion, the step effect and surface unevenness are remarkably reduced, the surface roughness can be reduced to Ra 0.2 micrometer or below, and the surface quality is improved. Through high-precision machining of femtosecond laser and optimization of a temperature control system, the size precision of the metal component can reach + / -0.01 mm, the high-precision manufacturing requirement is met, and the method is suitable for additive and subtractive composite manufacturing of various metal materials and particularly has remarkable advantages in machining of temperature sensitive materials or multi-layer composite materials.

The application discloses an arc additive and subtractive composite manufacturing process planning method and system, and specific steps of the method include three-dimensional modeling, slicing and layering, collision interference detection, cutter accessible area correction, interference identification to obtain an initial machining sequence, and process merging optimization to obtain an optimal process planning scheme. Compared with the prior art, the application proposes a cutter accessible area correction method fusing arc additive process characteristics, and realizes initial partitioning of the component without interference. On this basis, process merging optimization is carried out with the optimization target of minimizing the number of additive and subtractive process alternations, and a process planning scheme satisfying the interference-free constraint is obtained. Compared with the prior art, the application effectively solves the technical problems of poor process planning adaptability, process redundancy, high alternation cost, single manufacturing process data acquisition, and lack of real-time monitoring and intelligent control in the arc additive and subtractive composite manufacturing.

The present application relates to the field of intelligent manufacturing, and more particularly to a distributed workshop scheduling method for additive and subtractive hybrid manufacturing. The present application provides a two-stage algorithm, including a batching stage and a scheduling stage. In the batching stage, a balanced height distribution greedy algorithm with two-dimensional interval constraints and space block left-down placement strategy is designed to batch all the workpieces to be produced, determine the workpiece batches, and take the obtained batches as the coding information of the scheduling stage algorithm; in the scheduling stage, a non-dominated sorting genetic algorithm-II with excellent degree strategy driven variable neighborhood search is designed to perform additive and subtractive hybrid manufacturing scheduling, so as to achieve the optimization goal of minimizing the maximum completion time and the total production cost. The present application can realize additive and subtractive hybrid manufacturing scheduling, better utilize resources, maximize production efficiency, and reduce production cost through collaborative work of multiple workshops and load dispersion.

The invention discloses a frozen sand mold multi-mode additive and subtractive material in-situ composite manufacturing method, and belongs to the technical field of additive and subtractive material composite manufacturing. According to the method, on the basis of the water-ice phase change reversible characteristic of the frozen sand mold, a mixture of a sand mold material and water is frozen at low temperature to form an ice crystal network framework, precise material reduction machining is conducted on the frozen sand mold through five-axis numerical control equipment, and laser cladding, magnetic field oriented deposition and hot pressing sintering multi-mode material increase technologies are combined; and in-situ additive forming is achieved on the surface of the cavity after material reduction. By regulating and controlling the temperature gradient or the magnetic field intensity, a middle combination or three-dimensional interlocking structure of the material adding layer and the ice sand base body is achieved, finally sand materials are recycled through the gradient unfreezing and separating technology, and the material utilization rate is increased. The precision limitation of traditional sand mold casting is broken through, the manufacturing cost is reduced compared with a traditional additive and subtractive process, and the method is particularly suitable for the precision manufacturing field of aerospace complex inner runner components, new energy automobile integrated castings and the like.

This invention belongs to the field of additive-subtractive composite manufacturing technology, and discloses a five-axis linkage additive-subtractive composite machine tool and control system. The machine bed base assembly has left and right guide rail seats symmetrically fixed on both sides of its top. The worktable is fixed in the middle of the machine bed between the two guide rail seats. An integral crossbeam is mounted across the top surface of the left and right guide rail seats and can move linearly along the X-axis. Two independent machining units are mounted in parallel along the Y-axis on the integral crossbeam: the subtractive side crossbeam slide plate carries a subtractive slide block and a subtractive electric spindle actuator, and the additive side crossbeam slide plate carries an additive Z-axis slide table and a double-swing additive head. The worktable is divided along the X-axis into a subtractive-specific machining area, a composite machining area, and an additive-specific machining area. The two machining units can operate independently in their respective dedicated areas, or enter the composite machining area at different times to collaboratively complete the additive-subtractive composite machining. This invention combines high structural rigidity with machining flexibility, avoids secondary workpiece clamping errors, and significantly improves machining efficiency and accuracy.

The invention discloses a material increasing, strengthening and material decreasing composite manufacturing system, and relates to the field of industrial manufacturing. Wherein the composite manufacturing process planning module is used for generating a material increasing / strengthening / material decreasing composite manufacturing step subprogram of a to-be-printed workpiece; the process control module timely transmits step subprograms to the five-axis CNC control module and the robot control module according to a corresponding time sequence; on one hand, the five-axis CNC control module realizes motion control and start-stop control of the laser additive module, and on the other hand, the five-axis CNC control module realizes laser additive and numerical control subtractive composite manufacturing of a to-be-printed workpiece; the robot control module is used for controlling the ultrasonic enhancement module to realize the ultrasonic enhancement function of the workpiece; the information sensing module is used for monitoring multi-source sensing information in real time; the multi-modal information fusion and decision-making module carries out preprocessing, feature recognition and feature analysis on the multi-source sensing information and monitors the state of the machining process so as to analyze the stability of the machining process. According to the invention, high-performance and integrated composite manufacturing of complex workpieces can be realized.

The invention belongs to the technical field of metal explosive cladding manufacturing, and discloses an explosive welding initiating explosive forming mold, an initiating explosive column and an explosive welding method. The mold comprises a pipe body and a cone assembled in the pipe body. The top end of the cone is upward, and a gap is reserved between the bottom face of the cone and the lower end face of the tube body, so that an upper columnar charging cavity and a lower conical energy gathering cavity are formed in the tube body. By means of the simple split design, traditional manual explosive pit digging operation is converted into a standardized process, the energy-gathered initiating explosive column with the highly-consistent shape, size and explosive loading amount is prepared, personal errors are thoroughly eliminated, and repeatability of initiation energy is guaranteed. And meanwhile, the bottom energy gathering cavity structure is beneficial to improving the energy utilization rate, and is particularly suitable for explosive welding of the multi-layer metal plate with the medium thickness. The device has the remarkable technical advantages of simple structure, low cost, time-saving operation, safety, high efficiency, batch production and the like.

The invention discloses an additive and subtractive composite manufacturing process planning method based on manufacturability. The method comprises the steps that mesh generation is conducted on an additive and subtractive model, and then fine processing and exporting are conducted; extracting geometric feature edges of the refined grid model, and segmenting the model according to the geometric feature edges to obtain corresponding sub-models; establishing a hierarchical relationship between the sub-modules for the segmented sub-models according to a topological relationship; parameterizing the model based on a heat source geodesic calculation method to obtain a geodesic distance of a vertex in the model body; utilizing a linear interpolation method to calculate geodesic distance isolines for layering to carry out curved surface layering on the volume model; modeling is conducted on the printability of an additive nozzle and the machinability of a subtractive cutter in the additive and subtractive mixed manufacturing process, and corresponding evaluation standards are set; carrying out rapid calculation based on a light source projection method of a Gaussian ball, and solving to obtain an interference relation between the cutter shaft and the obstacle; and establishing a process planning problem model to obtain a planning process of the model.

The invention relates to the technical field of automobile roof manufacturing, in particular to an automobile roof material composite manufacturing process which comprises a workbench, a gluing roller set and an extrusion roller set, the workbench is used for laying non-woven fabric and comprises symmetrically-arranged main plates, and the opposite sides of the main plates on the two sides are provided with auxiliary plates hinged to the main plates; the gluing roller set is located above the auxiliary plate, the extrusion roller set is arranged below the auxiliary plate, the extrusion roller set and the gluing roller set are correspondingly arranged, the extrusion roller set comprises a first extrusion roller and a second extrusion roller, the first extrusion roller and the second extrusion roller are arranged in a relative rotation mode, and the PU plate and the coating layer are extruded and compounded through the first extrusion roller and the second extrusion roller to form a ceiling base material. Traditional manual stacking is replaced with an automatic means, accurate positioning and efficient compounding of multiple layers of materials are achieved, and therefore the production efficiency is improved, the good attaching degree between the layers of materials is guaranteed, and the stability of the product quality is guaranteed.

The invention belongs to the technical field of surface engineering, and relates to a laser cladding precision forging machine shaft sleeve material and a preparation method thereof. The functional layer alloy powder comprises the following components in percentage by mass: 2-5% of SiC powder and the balance of copper-based alloy powder; the copper-based alloy powder comprises the following components in percentage by mass: 5%-10% of Sn, 0.3%-0.5% of Si, 0.3%-0.5% of Mn, 0.5%-1.5% of Ni, 0.1%-0.6% of Fe, 8%-10% of Al, 0.01%-0.03% of Ce and the balance of copper. The copper alloy coating material is cladded on the inner surface of the shaft sleeve, so that the shaft sleeve has excellent buffering and energy absorbing effects, the coating has excellent wear resistance, and the tin-based babbitt metal coating is compounded on the surface through a spraying process, so that the shaft sleeve has excellent anti-attrition effect. The domestic precision forging machine shaft sleeve meeting the use requirements is produced through a composite manufacturing method combining a laser cladding process with a brush plating process and a high velocity oxy-fuel spraying process for the first time. And localization of imported spare parts is achieved, meanwhile, the production cost of enterprises can be reduced, and the method has profound significance in the industry.

The invention provides a high-performance thermoplastic composite material box section structure and a composite manufacturing process thereof. The continuous fiber reinforced thermoplastic resin is used for preparing the box section structure for the first time, the box section structure can be guaranteed to have good impact strength while weight reduction is achieved, and a new thought is provided for preparation of the box section structure. Meanwhile, due to the characteristic that the thermoplastic resin can be repeatedly processed, the connection mode between the inner skin and the outer skin has multiple possibilities, the problems of complex laying, mutual connection and time consumption of repeated curing molding of thermosetting materials are solved, and the manufacturing efficiency is further improved.

A device and method for compositely manufacturing a metal component based on additive and subtractive materials assisted by pulse current comprises an intelligent control system, and the intelligent control system regulates and controls work switching of an additive manufacturing module, a subtractive machining module and a pulse current auxiliary module and provides process guidance feedback for the additive manufacturing module, the subtractive machining module and the pulse current auxiliary module. On the basis of acquisition information of the surface temperature and the geometric dimension of a component, forming process parameters of additive manufacturing, a cutting strategy of subtractive machining and input of pulse current are adjusted in real time, a pulse current auxiliary module acts on the whole process of additive and subtractive alternate forming, and preheating and slow cooling functions are achieved in the additive manufacturing stage; the surface machinability is improved in the subtractive machining stage; the three-in-one ordered integration of the material increasing module, the material decreasing module and the pulse current processing module under the centralized control of the intelligent control system is realized, and the technical problems of metallurgical defect control, machining precision control and manufacturing cost control in the material increasing and decreasing forming period are solved.

The application belongs to copper alloy material for laser additive manufacturing, and particularly relates to a kind of copper plate material for laser composite manufacturing precision forging machine impact resistance wear resistance and preparation method thereof.Copper alloy material is added solid lubricant Ni-M O S2 and wear-resistant hard phase TiB2 copper-based alloy powder, including the following mass percentage components: Ni-M O S2 powder 1%-10%, TiB2 powder 5%-15%, the balance is copper-based alloy powder; Copper-based alloy powder is including the following mass percentage components: 5%-12% Ni, 9%-10% Sn, 4%-5% Fe, 0.2%-1% Al, 0.3%-0.8% Co, 1.2%-5.5% Ti, the balance is copper.The application is cladded after adopting coating material to the surface of base material, with excellent impact resistance, the wear and tear amount within the service life is equal to imported, but the overall manufacturing cost is far lower than imported copper plate;Using composite manufacturing method, while guaranteeing service life, it can reduce enterprise production cost.

A kind of composite manufacturing method of blade leading edge titanium alloy reinforcing edge hot creep and diffusion connection, titanium alloy reinforcing edge upper and lower thin-walled prefabricated parts are respectively prepared by the way of cutting plate material, titanium alloy reinforcing edge middle layer block prefabricated part is prepared by the way of cutting titanium alloy block material;After being assembled, the upper thin-walled prefabricated part, the core mold, the middle layer block prefabricated part and the lower thin-walled prefabricated part are arranged between the upper and lower molds, and the prefabricated part is bent and attached to the mold by cold pressing, and the titanium alloy reinforcing edge is obtained by composite forming after die closing.The composite method of hot creep and diffusion connection after piece cold pressing is used to process leading edge reinforcing edge once, which can significantly improve the forming efficiency and material utilization rate, shorten the processing cycle, and at the same time, the size precision and forming quality of reinforcing edge can be well controlled.

A quality control system may include a controller configured to be communicatively coupled with a monitoring assembly including one or more detectors. The controller may implement two or more artificial intelligence quality control (AIQC) modules associated with two or more process steps for fabricating a composite material, where each of the two or more AIQC modules is associated with a different one of the two or more process steps. A particular AIQC module may receive monitoring data associated with the particular process step for a workpiece, generate quality control data using a particular AI model, and update the particular AI model based on testing data associated with the workpiece from one or more testing tools after at least the particular process step.

This invention relates to an additive-subtractive composite manufacturing equipment for producing graded functional parts. The equipment comprises two powder feeder assemblies mounted on a process housing, with a laser output position located between them. A powder scraping mechanism and a moving mechanism are located at the upper end of the frame. The powder scraping mechanism is situated in the processing area on the upper table of the frame, and a worktable is housed within a worktable through-hole on the worktable surface. A sealed box is located within the frame, containing a worktable lifting mechanism. The worktable is raised and lowered via this mechanism. A flip-type powder guide sleeve is located on the underside of the powder feeder assembly closer to the moving mechanism, while a fixed powder guide sleeve is located on the underside of the powder feeder assembly furthest from the moving mechanism. After the flip-type powder guide sleeve is flipped open, a cutting device is driven by the moving mechanism to enter the area above the processing zone. This invention enables alternating additive and subtractive processes to complete the additive-subtractive composite machining of parts.

A multifunctional additive-subtractive composite manufacturing apparatus and its method of use are disclosed. The apparatus includes a first-arm robot, a welding torch, a second-arm robot, an additive-subtractive composite processing mechanism, and an additive manufacturing substrate. The additive-subtractive composite processing mechanism includes a frame, three sets of hammer milling composite processing equipment, and two sets of equipment attitude adjustment components. The hammer milling composite processing equipment includes an outer protective cylinder, an elastic coil, an inner isolation cylinder, an iron core hammer rod, a milling drive motor, a quick tool changer, a hammer head, a milling cutter, an electrical control module, a buffer spring, a buffer washer, a hammer rod positioning screw, a laser displacement sensor, a shifting slip ring, and a cam paddle. This invention realizes the combination of additive, subtractive, and additive manufacturing processes, and can perform additive manufacturing of metal components with three-dimensional hammering composite processing, additive manufacturing with cold and hot hammering composite processing, and additive manufacturing with end-face hammering and side milling composite processing. It features good controllability, good processing uniformity, high processing accuracy, and high processing stability.

The invention discloses an additive and subtractive composite manufacturing online monitoring method, which comprises the following steps of: acquiring strain characteristics in an additive and subtractive process by utilizing a monitoring and feedback control system comprising a substrate, a strain gauge, a strain collector, a data processing computer, an additive and subtractive composite forming control system and a motion system; according to the method, real-time monitoring of substrate deformation in the additive and subtractive composite manufacturing process is achieved, whether process adjustment of additive and subtractive composite manufacturing needs to be carried out or not is judged by comparing strain signals with strain signal preset values in a process adjustment database, feedback control is achieved, the local large strain phenomenon in the additive and subtractive manufacturing process can be found in time, and the production efficiency is improved. The method has the advantages of preventing crack defects, monitoring the state of the cutter, optimizing the roughness and dimensional precision of the machined surface, solving the problem of part machining failure caused by hot cracks or low precision in additive and subtractive composite manufacturing, and having wide application prospects and remarkable technical advantages.

The application discloses a powder laying type multi-laser additive and subtractive composite manufacturing method, which comprises the following steps: forming a part shape contour on powder by using a forming laser; performing in-situ scanning on the part shape contour by using an ultrafast laser; according to a pre-tested subtractive thickness h, controlling the overall lifting of a substrate by h, and lifting the position where the part shape is not cut to the effective focal length range of the ultrafast laser; after one or more times of scanning on the current layer by using the ultrafast laser, the bottom lifting mechanism of the forming bin drives the substrate to be lifted by h again, and the part shape contour is subtracted by using the ultrafast laser again, and the above steps are repeated until the total height h of the substrate is greater than the additive height H t , and the subtractive process is ended; the bottom lifting mechanism of the forming bin drives the substrate to be lowered by h again n +H, the powder scraper lays the metal powder with the thickness of H on the substrate, and the additive process of the next layer is performed until the whole part printing process is ended. The application achieves the purpose of the multi-laser additive and subtractive composite manufacturing for compensating the height.

The utility model discloses a copper clad steel strip hot compound device relates to the technical field of hot compound manufacturing of composite board, in order to solve the problem of the performance of composite board caused by oxide formation, the device includes the protective atmosphere room, and the both ends of protective atmosphere room are provided with the open feed inlet and discharge port respectively, and the feed inlet is used to provide copper band and preheated steel strip, and the discharge port is equipped with the hot rolling roller group for hot pressing copper band and steel strip, the inner chamber of protective atmosphere room is communicated with the gas pipe group, and the gas pipe group is used for the supplementary ammonia decomposition gas and nitrogen into the protective atmosphere room, and the cooling water pipe group is located in the inner chamber of protective atmosphere room, and the circulating cooling water is passed into the cooling water pipe group, so setting, can effectively isolate oxygen in air, avoids the oxidation reaction of the surface of preheated steel strip in the composite process, thereby the performance of composite board is improved significantly.

The application provides a large heat dissipation structure integrated manufacturing tool and method, and belongs to the field of laser processing manufacturing. According to the size of a laser selective melting forming device, under the premise of ensuring the integrity of a special structure of a part, a region with low laser welding difficulty is selected for cutting, and then segmented laser selective melting forming manufacturing is carried out, and then laser welding is carried out, so that the composite manufacturing of a large-size part is realized through multiple laser processes. In the laser selective melting forming process, the welding area is reserved with an excess amount and an arc starting and collecting plate is designed, the excess amount is removed after welding, and the consistency of the weld quality is ensured. In the welding process, the welding gun posture and welding parameters are optimized, the contamination of spatter on the gun head is improved, and the stability of the welding molten pool is improved. After the laser selective melting forming and the laser welding, heat treatment is carried out on the part, a special tool is used, welding thermal stress is eliminated, and the deformation of the part in the heat treatment process is reduced.

The application belongs to the field of additive manufacturing, and specifically discloses a 3D printing and mechanical processing composite manufacturing system and a workpiece manufacturing method. The composite manufacturing system comprises a servo turntable, a first mechanical arm, an additive manufacturing module integrated at the tail end of the first mechanical arm for forming a solid member on the servo turntable, the additive manufacturing module comprising a direct writing forming nozzle and at least one fused deposition forming nozzle, a second mechanical arm, a subtractive and detection module integrated at the tail end of the second mechanical arm for 3D scanning and milling processing of the solid member, the subtractive and detection module comprising a 3D scanning device and a mechanical milling device, and a control module electrically connected with the servo turntable, the first mechanical arm, the additive manufacturing module, the second mechanical arm and the subtractive and detection module. The application can solve the technical problem that heat-sensitive non-metallic members are difficult to balance between efficient forming and high-precision processing, effectively improves the functional integration level of the equipment, and simplifies the manufacturing process of multifunctional members.

The application discloses a kind of complex inner flow channel of engine cylinder body additive-subtractive composite manufacturing method, comprising the following steps, step 1, by additive manufacturing, engine cylinder body is printed to the preset height of complex inner flow channel, the printing work of base body is completed;Step 2, carry out subtractive work on base body, obtain one part structure of complex inner flow channel;Step 3, independently carry out additive-subtractive composite manufacturing outside cylinder body, another part structure of complex inner flow channel is manufactured into shape;Step 4, the one part structure of complex inner flow channel in step 2 is aligned with the another part structure of complex inner flow channel in step 3, welding is completed to manufacture the complex inner flow channel of engine cylinder body.Achieve different flow channel manufacturing without changing additive manufacturing direction, and the purpose that inner surface can be complete inner surface processing.

The invention discloses a composite manufacturing method based on interlayer alternate additive polishing, and belongs to the technical field of additive manufacturing and surface finishing composite processes, the method comprises the following steps: sequentially depositing a kth layer and a (k + 1) th layer of additive layer on a substrate or a formed body, and carrying out in-situ polishing treatment on the (k + 1) th layer of exposed surface, by controlling the quantitative relation between the polishing depth and the thickness of an additional material layer, the ratio of the additional material to the polishing energy density and the included angle of a scanning path, the next additional material layer is preheated in combination with polishing waste heat, the interlayer temperature gradient is controlled, the steps are executed circularly till a workpiece is completed, and meanwhile a polishing skipping mechanism is arranged for a supporting structure layer and an initial layer; and the polishing energy is adaptively adjusted through real-time monitoring of the surface roughness. According to the method, the limitation that traditional additive manufacturing and post-treatment are disjointed is broken through, interlayer defect real-time repair and residual stress regulation are achieved, the surface quality and density of the component can be remarkably improved, the surface roughness is reduced, and the manufacturing efficiency is improved.

This invention relates to the field of high-temperature alloy additive and subtractive manufacturing technology, and more specifically to a method and system for additive and subtractive manufacturing allowance planning and code generation based on deformation stress prediction. The method includes the following steps: S1, acquiring deformation distribution data, key point deformation data, residual stress distribution data, and residual stress layer thickness data of the component during high-temperature alloy additive manufacturing; S2, setting an accuracy threshold to identify out-of-tolerance areas, and determining the removal allowance based on the stress layer thickness; S3, establishing an optimization model to minimize deformation and stress layer thickness, and solving for the dynamic sequence of additive parameters in the height direction; S4, generating a basic subtractive manufacturing path, adjusting cutting parameters, and achieving a smooth transition; S5, implementing additive and subtractive manufacturing based on the dynamic sequence and code. This invention achieves minimized control of component deformation and residual stress, and improves processing accuracy and performance by predicting deformation and residual stress data and dynamically optimizing additive and subtractive manufacturing process parameters and processing paths.