218results about How to "Guaranteed forming quality" patented technology

The invention provides a metal laser selective melting method. The metal laser selective melting method is characterized in that two kinds of lasers with different powers are adopted for conducting laser melting on metal powder zones needling to be melted; during melting, the lasers with the low power firstly conduct scanning on outline boundaries of the metal powder zones; then the lasers with the high power conduct scanning on internal zones of the metal powder zones; and during scanning, the thickness of a metal powder layer obtained by scanning with the lasers with the high power one time is integral multiples of the thickness of the metal powder layer obtained by scanning with the lasers with the low power one time. According to the metal laser selective melting method, the efficiency of the laser molding process is improved, and meanwhile, the surface quality of a metal part is guaranteed; and in other words, while the stability and the molding quality of the overall process are guaranteed, the building speed of metal laser selective melting equipment is improved as a whole.

The invention discloses a method for improving precision of stepped components in a laser spot-changing direct formation mode. The method includes the steps that a cladding test is performed firstly, the sectional width and height data of a single-track cladding layer under different technological parameters are obtained, orders of a sectional curve of the cladding layer under different aspect ratios are fitted out, and the function relationship between the orders of the sectional curve of the cladding layer under the different aspect ratios and the height and lifting capacity of the single-track cladding layer is built; then single step-shaped tracks corresponding to the same lifting capacity are built, the technological parameters of the laser spot-changing cladding single tracks are determined according to the single step-shaped tracks, and a highly-smooth cladding layer is formed in a cladding mode through laser spot-changing direct formation; after one cladding layer is completed, a spray nozzle is lifted by a layering height, new fusion tracks are formed in a cladding mode through the single step-shaped tracks, and operations circulate until manufacturing of a three-dimensional part is completed. By means of the method, the highly-smooth cladding layer is obtained, the phenomenon that the top of the cladding layer is not even and portions of small aspect ratios are prone to tension fracture is avoided, and the method improves formation precision and guarantees formation quality.

The invention discloses a light spot and powder spot automatic collaboration controlled laser metal added material manufacturing device and a method. The device comprises a connecting joint, a laser focusing head and a sleeve respectively fixed at the upper end and the lower end of the connecting joint, a mobile sleeve slidingly coating the sleeve, a powder feeding nozzle fixed at the lower end of the mobile sleeve, and a numerical control worktable for placing workpieces; the laser focusing head is used for forming light spots on workpiece machined surfaces of a focusing mirror; the powder feeding nozzle is used for gathering powder currents to feed in a machining position to form powder spots on the workpiece machined surfaces; the centers of the light spots and the powder spots are overlapped always; the numerical control worktable is used for driving the workpieces to perform the space movement corresponding to the focusing mirror to control the out-of-focus distance; and a driving device is arranged on the mobile sleeve for driving the powder feeding nozzle to move up and down through the mobile sleeve to control the sizes of the powder spots. When the method forms thick and large workpieces with the cladding layer sizes exceeding the adjusting range, the profile scanning and filling scanning combined path formation is adopted.

The invention discloses a novel laser indirect impact micro-forming device and method. The device and method are mainly applied to plastic forming technique and manufacturing of fine micro parts. The device and method solve the problem that a conventional laser impact micro-forming method is difficult in forming, and materials cannot be formed. The device comprises a mold-debug light spot centering assembly, a workpiece positioning assembly, a workpiece assembly, an Nd:YAG pulsed laser system used for impact forming, a CW optical fiber laser system used for heating, an ultrasonic vibration system and a control system. The device can achieve the aim that pulsed laser impact force is adopted to serve as an energy source, meanwhile, ultrasonic vibration is applied to a mold and a workpiece, or, a laser beam sent out by a CW optical fiber laser is used for carrying out non-contact type quasi-static heating on the surface of the workpiece, or, under the joint effect, workpiece micro-forming is achieved; due to the design, work efficiency is improved, design is reasonable, control performance is good, quality and precision of micro-forming parts are ensured, and the device is suitable for industrialized application.

The invention relates to a heading machine memory cutting control system and a method of the heading machine memory cutting control system. The heading machine memory cutting control system is composed of a detection unit, a control unit, a proportion amplification plate, a load sensitivity type proportion reversal valve group and an execution unit, wherein the control unit comprises a PCC (programmable computer controller), an intelligent operation control panel, a remote controller and a machine body operating handle; and heading machine memory cutting comprises a manual demonstration process and a memory automatic cutting process. The method comprises the following steps that: firstly, a heading machine driver utilizes the remote controller or the machine body operating handle to operate the heading machine to cut once according to a top plate and a bottom plate of a coal seam and the coal rock distribution condition, and an airborne computer control system records information a demonstration path detected by the detection unit; and then the recorded keypoint data is subjected to path matching and intelligent optimization, a control signal is sent to the execution unit according to the path after optimizing, so that a cutting head is automatically controlled to move along a demonstration track, and the memory automatic cutting is performed. The heading machine memory cutting control system is also provided with a boundary control function in the whole memory cutting process, and the tunnel shaping quality when the manual cutting and memory automatic cutting are performed is ensured. The heading machine memory cutting control system and the method of the heading machine memory cutting control system provide a new control means for heading of a coal road boom-type roadheader under the condition with stable surrounding rock of roadway.

The invention relates to a suspension supporting base multi-station progressive die which comprises an upper die assembly, a lower die assembly, an unloading plate, an unloading plate base plate and a mis-feeding detection device. The upper die assembly is sequentially provided with a corresponding male die in the feeding direction, the lower die assembly is sequentially provided with a female die embedding sleeve matched with the male die of the upper die assembly, corresponding positions on the unloading plate and on the unloading plate base plate are provided with a through hole capable of penetrating through the male die of the upper die assembly, the unloading plate is disposed on the unloading plate base plate, and the unloading plate base plate is arranged on the upper die assembly through an unloading spring. By means of the progressive die, suspension supporting bases are produced in a continuous drawing progressive die mode. The mechanism is compact in structure, high in guide precision, stable in unloading and precise in pitch fixing, and feeding and discharging are convenient to achieve. A quick replacement structure is adopted to a punching male die, and maintenance and replacement time of the die is effectively shortened. After being tried, the mechanism is good in use effect and can meet requirements for high efficiency and high precision of stamping production.

The invention discloses a plate warm electro-hydraulic high-speed impact-quasi static hydraulic composite forming device and a plate forming method achieved by adopting the device and relates to the field of metal material processing forming to solve the problems that forming of plates and complex parts is difficult, film attaching is poor, and deformation is not even. A vacuum pump is used for pumping out gas in a female die cavity; a fluid injection device is adopted for injecting high-temperature-resisting liquid to a liquid chamber; a heating device is used for heating the female die cavity, the high-temperature-resisting liquid in the liquid chamber is heated, preheating on a to-be-processed plate is completed, and heat preservation is conducted on the to-be-processed plate; an electromagnetic forming system is used for conducting discharging forming on the to-be-processed plate; high-pressure warm liquid is slowly injected into the liquid chamber under the quasi static condition, and quasi static hydraulic forming is conducted on the to-be-processed plate; and the high-pressure warm liquid in the liquid chamber is cooled to the room temperature within a period of time, waste liquid is recycled, an electro-hydraulic forming die is opened, and the to-be-processed plate is taken away. The device and the method are used for forming plates.

The invention relates to a method for forming a uniformly-variable-height component through laser. According to the method, each cladding layer is segmented through normal direction layering, then, the difference value between the actual stacking height of each small segment of each layer and the ideal stacking height of the small segment is measured and calculated, the scanning speed of each small segment of the next cladding layer is corrected through calculating, and thus closed-loop control of the cladding layer height is achieved; the cladding layers with continuously variable heights can be automatically formed through the method for forming the uniformly-variable-height component through the laser, meanwhile, the width of the cladding layers is kept to be constant, the bevel step effect is eliminated, the complexity and the forming efficiency of the laser 3D forming component are improved, and the forming quality is ensured. Compared with the prior art, the uniformly-variable-height component formed through the method is high in stability and precision, a lot of earlier-stage cladding layer orthogonal tests are omitted, a large amount of time can be saved, and a large amount of cost can be reduced. The forming process is completed fully automatically, process parameters can be subjected to self adaptation and correction according to feedback data of a layer-height control sensor, and manual intervention can be avoided.

Disclosed is an adjustable reverse-deformation welding jig for titanium alloy. The adjustable reverse-deformation welding jig for titanium alloy comprises a base and a clamping platform, wherein the clamping platform is located on the base. A first square groove is formed in the middle of the clamping platform, a reverse side gasket is fixedly arranged in the first square groove, and reverse deformation cushion strips are placed on the two sides of the reverse side gasket. A titanium alloy test plate is placed on the clamping platform, and a left press plate and a right press plate are placed on the titanium alloy test plate. Rapid clamps are installed on the clamping platform and tightly press the titanium alloy test plate by tightly pressing the left press plate and the right press plate. The reverse side gasket, an air pipe, the reverse deformation cushion strips, the left press plate and the right press plate are made of materials easy to achieve heat dissipation. The adjustable reverse-deformation welding jig for titanium alloy can provide reverse side protection in the process of titanium alloy welding, ensure the forming quality of the reverse side, and effectively reduce welding deformation.

The invention provides a laser cladding lateral powder feed processing head, a laser tube, a powder spray nozzle and a powder spray nozzle clamping mechanism, wherein the powder spray nozzle clamping mechanism includes a support arm and a parallel linkage mechanism; the support arm takes the shape of a square without the left edge; the support arm is mounted on the laser tube in a supported manner; the parallel linkage mechanism includes a driving link, an upper driven link, a linkage link, a clamp link and a driving unit; the powder spray nozzle is mounted on the clamp link; and further, three points, namely the focus point of focused laser beam emitted by the laser tube, the convergent point of powder beams sprayed out by the powder spray nozzle, and a first top point coincide. The laser cladding lateral powder feed processing head enables light beam energy to be distributed uniformly on the surface of a workpiece, improves the powder utilization rate and formation quality of laser cladding, simplifies control technical requirements for coordinate operation of a worktable, improves simplicity and flexibility degrees of process parameter adjustment, and further provides an incidence angle for automatically adjusting the powder beams to enter a laser cladding bath according to the practical situation during the processing, thereby realizing feasibility of better laser cladding formation quality.

The invention discloses a laser scanning path planning used for additive-manufacturing a three-dimensional object. The laser scanning path planning method comprises the following steps: firstly, inputting each layer of slice files of a part model; then, determining a partition datum line according to structural features of a part and user settings, and partitioning each layer of slices of the part; and finally, performing S-shaped scanning planning in each partition, wherein an S-shaped scanning path comprises a datum line, a circular-arc section and a linear section. According to the method disclosed by the invention, S-shaped scanning path planning is performed on sliced files, heat input can be improved in a scanning process, relatively high energy is kept, and the forming quality problem due to the fact that burning loss is caused as thermal stress is too great or scanning speed is low while cold speed is too high during great-width and large-light-spot part processing can be effectively solved. While part quality is improved, skip reduction is realized through circular-arc oscillation, so that the service life of a laser unit is prolonged.

The invention provides a forming method of a flange ring for an automobile tail gas recycling device. By combining necking in spindown with reducing spinning, a tube billet can be directly formed to obtain the flange ring for the automobile tail gas recycling device, so the surface quality and integral mechanical property of the flange ring are improved; meanwhile, the productivity and the utilization rate of materials are improved.

The invention provides a laser melting forming dust-removing system with multifunctional circulating air flow and a dust-removing method. The dust-removing system comprises an upper cavity and a lower cavity. Three induced air ways are led out of an air inlet of the upper cavity and are the first induced air way, the second induced air way and the third induced air way. The first induced air way communicates with a dust-removing subsystem in a scanning area. The second induced air way communicates with a dust-removing subsystem of a laser protection mirror. The third induced air way communicates with a dust-removing subsystem of a movement sliding table cavity. The laser melting forming dust-removing system with multifunctional circulating air flow and the dust-removing method have the beneficial effects that in the whole laser melting forming process, smoke-shaped dust generated when lasers act on metal powder can be absorbed into a dust filter in time under the effect of a draught fan, dust generated by part forming is filtered out in time through the dust filter, the influences, on the subsequent forming quality, of the smoke-shaped dust are prevented, and the forming rate is increased; and in addition, the dust is prevented from rising to the position near the laser protection mirror located over the scanning area, and the dust is prevented from entering a sliding table guide rail in the sliding table cavity.

The invention relates to a constant-tension control device for a winding device. The constant-tension control device for the winding device comprises yarn guide rolls, wherein the yarn guide rolls are used for conveying yarn to a winding pan head in a guiding mode, the rotating speed of the winding pan head is controlled by a PLC and is adjusted through the PLC when different winding diameters are adopted, a pressure sensor is arranged between the winding pan head and the yarn guide rolls, the yarn which is led out through the yarn guide rolls penetrates through the pressure sensor and is conveyed to the winding pan head in the guiding mode, the output end of the pressure sensor is connected to the PLC, the winding pan head is driven by a winding motor to rotate, the winding motor is connected with a first frequency converter and an encoder, the first frequency converter and the encoder are connected to the PLC, and the frequency of the first frequency converter is controlled by the encoder through the PLC.

The invention provides a water-proof method for a seepagetunnel with super burial depth. The method comprises the following steps: before the construction, carrying out the step of increasing the thickness of duct pieces and the step of enhancing the connection between contact surfaces and end faces of the duct pieces, wherein the step of enhancing the connection between the contact surfaces and the end faces of the duct pieces comprises the following steps: increasing the quantity of annular bolts and adding a rebate groove on the annular surfaces of the duct pieces; and increasing positioning rods and double-channel waterstop bands on the end faces of the duct pieces; during the construction, sealing the top of a tube piece lining with a top block of small size when assembling the wedged tube pieces; and selecting rational grouting points on the assembled duct pieces to synchronous grout the duct pieces; and after the construction, filling and blocking handholes and caulked joints of the duct pieces. By using the technical scheme, improving the original duct piece design and constituting a rational construction process, the method ensures the forming quality of the tunnel and controls the synchronous grouting and ensures the stability of the tunnel and the caulked joints of the tunnel and the like so as to meet the water-proof requirement of the seepagetunnel with super burial depth.

The invention discloses an aluminum alloy hub powerful spinning machining molding method and a demolding mechanism. The demolding mechanism comprises a core mold structure which comprises an inner core mold and an outer core mold connected to the exterior of the inner core mold in a sleeving manner, and the demolding mechanism further comprises a suppressing block and a limiting stretching mechanism, wherein the suppressing block and the outer core mold which is stressed to move in the radial direction are fixedly locked, and the limiting stretching mechanism is used for pushing the core mold structure to move and driving the outer core mold to separate from the suppressing block. The machining molding method comprises the steps that a plate is jacked to the core mold structure through a tail jacking part to be fixed, the inner core mold is extruded, and the outer core mold is stressed to move in the radial direction to be matched and locked with the suppressing block; the core mold structure is rotated to drive the tail jacking device and the plate to rotate; and hub molding is carried out through a multi-wheel spinning process. By means of the aluminum alloy hub powerful spinning machining molding method and the demolding mechanism, the problem that demolding is difficult after complex section hub spinning molding is solved, the demolding principle is simple, and universality is high.

The invention belongs to the related technical field of additive manufacturing, and discloses a laser selective melting forming method suitable for a hydraulic valve block. The laser selective meltingforming method comprises the following steps that (1) a three-dimensional model of the to-be-formed hydraulic valve block is constructed, and two-dimensional slicing information is obtained; (2) laser selective melting forming equipment is laid with metal ceramic mixed powder, and a scanning path of the two-dimensional slicing information is automatically generated by the laser selective meltingforming equipment according to an algorithm; (3) layer-by-layer selective melting is conducted on the metal ceramic mixed powder by lasers according to the scanning path, and the hydraulic valve blockis formed; and (4) a three-dimensional image of a complex internal structure of the hydraulic valve block is obtained by adopting an optical coherence tomography, whether the forming quality meets design requirements or not is verified, if yes, forming is completed, and if no, the step (3) is repeated after the algorithm is generated by optimizing the scanning path. According to the laser selective melting forming method, the technological process is shortened, the cost is reduced, the economic benefit is improved, and the flexibility is high.