33results about How to "Solution volume" patented technology

The invention relates to the technical field of lithium batteries, in particular to a composite binder aqueous solution, a silicon-based negative pole piece and a preparation method and application of the silicon-based negative pole piece. The preparation method of the composite binder aqueous solution comprises the following steps: dissolving a water-based polymer binder and a micromolecular physical crosslinking agent in water, adding pyrrole, stirring, adding an initiator, and mixing to obtain the composite binder aqueous solution. A small molecule physical cross-linking agent is introduced into the water-based polymer binder, and a large number of hydrogen bond binding sites are increased, so that the mechanical property of the binder is remarkably enhanced, and the machinability of the pole piece is further improved. Meanwhile, polypyrrole can be generated in the binder through in-situ polymerization, and the polypyrrole can be tightly coated on the surfaces of the silicon particles through strong interaction between the binder and the silicon particles to form a stable conductive network, so that the charge transfer capability of the electrode is remarkably improved. In addition, the composite binder is also beneficial to formation of a solid electrolyte layer rich in Li-N and participates in formation of a solid electrolyte interface layer, so that the lithium ion transmission capability of the composite binder is further improved.

The invention relates to a direct-current circuit breaker based on a thyristor and an on-off method of the direct-current circuit breaker, and belongs to the technical field of direct-current middle-high voltage power system fault protection. The direct-current circuit breaker comprises a main switch branch, a current transfer branch, a voltage-limiting energy consumption branch and a pulse commutation loop, the direct-current circuit breaker is connected with a power system in series, and the main switch branch is connected with the current transfer branch. Two nodes connected in series are respectively marked as Q1 and Q2, the main switch branch and the voltage-limiting energy consumption branch are connected in parallel through the Q1 and Q2, one ends of secondary sides of two high-frequency transformers in the pulse commutation loop are respectively connected to the Q1 and Q2, and the other ends of the secondary sides of the two high-frequency transformers in the pulse commutation loop are respectively connected to two ends of the current transfer branch. The problem that in the prior art, a large number of pulse charging and discharging loops are configured for meeting the fault large-current breaking requirement, and consequently the size and cost are increased is effectively solved.

The invention belongs to the technical field of continuum robots, and discloses a variable-rigidity and driving combined continuum robot and an optimization design method thereof.The variable-rigidity and driving combined continuum robot comprises a second section, a middle transition section, a first section, a first section rope and a second section rope, and the second section and the first section are connected through the middle transition section; each of the second section and the first section comprises a plurality of wire guiding discs and a plurality of check rings, every two adjacent wire guiding discs are connected through the corresponding check ring to form a cylindrical pair joint, and the four first section ropes and the four second section ropes are evenly distributed relative to the center line of the continuum robot; the four first section ropes are used for driving two mutually perpendicular degrees of freedom of the first section, the four second section ropes are used for driving two mutually perpendicular degrees of freedom of the second section, and the second section and the first section move independently. The continuum robot does not need to be assembled, is flexible in movement, controllable in rigidity and small in friction force, and improves the interaction and sensing ability with the environment during operation.

The invention relates to the technical field of welding, in particular to a pressure vessel vertical girth welding device which comprises a base, a fixed rotating rod is fixedly connected to the top of the base, a supporting framework is rotatably connected to the surface of the fixed rotating rod, and a limiting sliding rod is fixedly connected to the top of the supporting framework. One end of the limiting sliding rod is fixedly connected with a motor set, and a front fixing frame, a rear fixing frame and a rotating base are movably inserted into the limiting sliding rod in a penetrating mode. According to the vertical girth welding device for the pressure vessel, the hydraulic push rod of the base can turn over the fixing device by an angle, so that the problems that the pressure vessel is large in size and heavy are solved, the pressure vessel can be conveniently placed, fixed, taken and carried when being horizontally placed, and the pressure vessel is lifted to a corresponding angle when being welded; the problem of circumferential welds of the pressure vessel is solved.

The utility model provides a bidirectional scattering distribution measuring system, which comprises a test base and a data transceiving control unit, the test base comprises a light source module, a detection module, a sample table, a first rotating mechanism enabling the sample table and the light source module to rotate relatively, and a second rotating mechanism enabling the sample table and the detection module to rotate relatively; a light beam emitted by the light source module enters a to-be-detected sample at a certain angle, and the detection module receives scattered light acted by the sample from another angle; the detection module comprises two or more detection units and a first switching mechanism used for switching the detection units. Compared with the prior art, different detection units are switched into an optical path through the first switching mechanism in an electric switching or mechanical switching mode, the multi-band spectral measurement requirement is met, and the multi-band spectral measurement device has the advantages of being high in automation degree, convenient to operate, high in measurement accuracy, wide in application range and the like.

The invention relates to the technical field of mining machinery, and discloses a light underground drill rig which comprises a vehicle body, a supporting arm and a drill arm which are sequentially connected, the drill arm is detachably connected with the supporting arm through a butt joint unit, and the drill arm is any one of a deep hole drill arm and an anchor rod drill arm; the control unit is connected with the supporting arm and the drilling arm, the control unit comprises a deep hole drilling machine module and an anchor rod drilling machine module, and the deep hole drilling machine module and the anchor rod drilling machine module are used for controlling the deep hole drilling arm and the anchor rod drilling arm to act correspondingly; the safety protection unit is arranged on the butt joint unit and used for monitoring the installation state of the drill arm and the supporting arm and giving an alarm. A modularized machine body structure is adopted, the drill arm can be replaced according to operation requirements, integrated design of a deep hole drilling machine and an anchor rod drilling machine is achieved, and the problems that the operation cost is high when two drilling machines are arranged at the same time, and the size and the mass of an underground drill machine are too large are solved; in the using process, the installation state of the drill arm and the supporting arm is monitored, and potential safety hazards are found and treated in time.

The invention belongs to the technical field of electrochemistry, and particularly relates to an artificial solid electrolyte interface film based on MXene quantum dots and a preparation method and application thereof.The preparation method includes the steps that an MAX phase is etched with concentrated hydrochloric acid to obtain MXene nanosheets, then the MXene quantum dots are obtained through freeze drying assisted by a hydrothermal method or an ultrasonic treatment method, and after the MXene quantum dots are mixed with a binder and a solvent, the MXene quantum dots are prepared into the artificial solid electrolyte interface film based on the MXene quantum dots. And coating and evaporating the solvent to obtain the artificial solid electrolyte interfacial film based on the MXene quantum dots. The reason that the MXene quantum dots are adopted as the artificial solid electrolyte interfacial film is that the surfaces of the MXene quantum dots contain a large number of lithium-loving groups, and the MXene quantum dots can be used as seed sites to induce a uniform lithium deposition process, so that the growth of lithium dendrites is effectively inhibited, and the coulombic efficiency of the lithium metal battery is improved.

The invention relates to a polymer-coated silicon-carbon negative electrode material, a preparation method thereof and a lithium ion battery. The polymer-coated silicon-carbon negative electrode material sequentially comprises a silicon-carbon base material, a carbon coating layer and a polymer coating layer from inside to outside, wherein the polymer coating layer comprises the following materials in percentage by mass: 50-98% of a high-adhesion material, 1-20% of a conductive material and 1-30% of an auxiliary material. The high-adhesion material comprises the following materials in percentage by mass: 60-95% of an acrylic monomer, 1-30% of a monomer A and 1-30% of a monomer B. The monomer A is prepared from at least one of vinyl acetate, acrylonitrile, styrene, 2-acrylamide-2-phenyl ethanesulfonic acid, hydroxyethyl methylacrylate, sodium lignosulphonate, acrylamide and N-vinyl pyrrolidone; the preparation method effectively solves the problems of volume expansion and short cycle life of a traditional silicon-carbon negative electrode material in application, and has relatively high practical value and potential market application prospect.

This utility model provides a compression and packaging device for a cushion, including a frame, a compression component, a sealing component, a clamping component, and a conveying component. The clamping component, sealing component, and conveying component are sequentially arranged within the frame along the cushion's movement direction. The clamping component clamps the plastic packaging of the cushion. The discharge end of the conveying component is connected to a cushion collection device, and the conveying component transports the compressed and packaged cushion. The compression component is located within the frame and above the conveying component, and is used to compress the cushion. This cushion compression and packaging device of this utility model incorporates a compression component that compresses the packaged cushion, making the interior of the cushion more compact. This solves the problem of bulky cushions being inconvenient to store and transport, facilitating stacking and subsequent storage and transportation.

The present invention discloses a metal lithium negative electrode and a preparation method and application thereof. The metal lithium negative electrode comprises metal lithium and a multi-element alloy phase distributed in the metal lithium, wherein the multi-element alloy phase comprises a skeleton phase and a functional phase, wherein the skeleton phase comprises a skeleton alloy formed by elements boron, silicon, or tin and lithium, and the functional phase comprises a functional alloy formed by lithium and at least one of the elements indium, tin, silver, magnesium, selenium or bismuth. The skeleton phase is used to stabilize the structure of the negative electrode and alleviate the volume expansion of the metal lithium. The functional phase reduces the surface potential energy of the negative electrode, regulates the uniform deposition of the metal lithium, and slows down the generation and growth of lithium dendrites.

An integrated control box relates to the technical field of low-voltage apparatuses. The integrated control box comprises a box body, a circuit board arranged in the box body and a switch assembly electrically connected with the circuit board. The circuit board is provided with a network cable interface and an external line interface, and the circuit board comprises a routing module and a gateway module. According to the integrated control box, the integration level of devices and the function integration level of the integrated control box can be improved, so that the size miniaturization of the integrated control box is realized, and the circuit can be simplified.

This invention discloses a deployable device for a large secondary mirror of a space optical remote sensing camera, comprising: several flipping mechanisms and several unfolding mechanisms; wherein the flipping mechanisms are stacked sequentially, and adjacent flipping mechanisms are connected by unfolding mechanisms; each flipping mechanism includes an upper flipping plate and a lower flipping plate; the lower end face of the unfolding mechanism is connected to the upper flipping plate of the flipping mechanism below it, and the upper end face is connected to the lower flipping plate of the flipping mechanism above it; when the flipping mechanism is unfolded, the upper and lower flipping plates are arranged vertically; when retracted, the upper and lower flipping plates are arranged parallel to each other; the unfolding direction of the unfolding mechanism can rotate 90 degrees. This invention can realize the large aperture, long focal length, lightweight, and two-dimensional planar unfolding of a space optical remote sensing camera to meet the spatial resolution requirements of remote sensing satellites in the field of space remote sensing.

The application discloses a neural network-based electromagnetic field simulation grid self-adaptive generation method. The application performs grid partitioning on a semiconductor device simulation model, obtains original partitioning data, and constructs node features; a non-directed graph is constructed, the graph nodes of which adopt the node features of the grid points, and the connecting edges adopt the Euclidean distances between the grid points and adjacent grid points; the non-directed graph is input into a double-branch neural network, and a predicted node position is output; each node of the original partitioning data is corrected by using the predicted node position obtained by the double-branch neural network, and new partitioning data is formed to perform electromagnetic field simulation. The method can not only efficiently adjust the node density by fusing physical field information, but also strictly maintain the geometric boundary and topological structure characteristics of the device.

The pure electric 80-ton shovel-type support transport vehicle of the present invention belongs to the technical field of design and manufacturing of auxiliary transportation equipment for coal mines; it comprises a shovel, a front frame, a middle frame, a rear frame, a battery lifting frame and a battery rack, the shovel is arranged in front of the front frame, the front frame is connected to the middle frame through a hinged part, the middle frame is connected to the rear frame through a slewing bearing, the rear frame is connected to the battery rack through a battery lifting frame, batteries are installed on the battery rack, the slewing bearing is a double-row slewing bearing, the battery rack is also connected to the rear frame through a battery tilting mechanism, under the action of the battery tilting mechanism, the tail of the battery rack is tilted up or laid flat to adapt to different ground slopes; the present invention adopts a dual-motor single-bridge input time-sharing drive mode to solve the shortcomings of large power and large volume of a single motor, separates motors of the same power to reduce the volume, and can be applied to vehicles with thin coal seams, and the time-sharing drive can improve the efficiency of the whole vehicle and extend the cruising range of the battery shovel truck.

The utility model provides a vehicle-mounted water tank heat preservation structure. The vehicle-mounted water tank heat preservation structure comprises a heat preservation water tank, the heat preservation water tank comprises a stainless steel water tank, rubber and plastic heat preservation cotton and oxford cloth, the stainless steel water tank is wrapped with the rubber and plastic heat preservation cotton, and the rubber and plastic heat preservation cotton is wrapped with the oxford cloth; a heating pipe is arranged in the heat preservation water tank, and a heating pipe water injection opening is formed in one side of the heat preservation water tank and communicated with the heating pipe. A water tank water filling port and a water outlet are formed in the bottom of the heat preservation water tank, a temperature sensor is arranged on the top of the heat preservation water tank, and a liquid level meter is arranged at the position, close to the top, of one side of the heat preservation water tank. The vehicle-mounted water tank heat preservation structure has the advantages of being light in overall weight, small in occupied space, rainproof, moistureproof and low in water tank heating cost.

The square heavy-load radial-resisting multi-section telescopic electric cylinder comprises a transmission assembly, a servo motor is arranged on the transmission assembly, a first bearing assembly is further arranged on the transmission assembly, a first cylinder barrel is arranged on the first bearing assembly, a second cylinder barrel is embedded in the first cylinder barrel, and the second cylinder barrel slides in the first cylinder barrel in a telescopic mode. A third cylinder barrel is embedded in the second cylinder barrel and slides in the second cylinder barrel in a telescopic mode, a first lead screw is arranged in the third cylinder barrel, the first lead screw is sleeved with a second lead screw, a connecting block is arranged at the upper end of the first lead screw, and the first lead screw drives the second lead screw to synchronously rotate forwards and backwards through the connecting block. The second cylinder barrel can completely retract into the first cylinder barrel, the third cylinder barrel can completely retract into the second cylinder barrel, the size of the electric cylinder is minimized, the stroke of the electric cylinder is maximized, the problems that a traditional electric cylinder is large in size and short in longest stroke are solved, and the service life of the electric cylinder is prolonged. The problems that an electric cylinder of an existing structure bears small radial force and is small in torque and poor in precision are solved.

The invention discloses a front-end debugging method and device based on reverse proxy and a storage medium, and the method comprises the following steps: reversely proxy a preset lightweight server to a preset proxy port of a preset local server to form a proxy server; sending an HTTP request to the preset proxy port through a front end to be debugged, and respectively obtaining a static file and a CGI file from the preset local server and the proxy server through the HTTP request; wherein the HTTP request comprises a static file request message and a CGI file request message; and sending the static file and the CGI file to the front end to be debugged, so that the front end to be debugged completes front end debugging according to the static file and the CGI file. According to the invention, the debugging efficiency of the front-end webpage can be improved.

This invention provides a large-image-area, long-working-distance objective lens system for micro-projection, comprising: a first projection lens, a first lens group (1), a first aperture stop (3), a second lens group (2), a first beam splitter (4), a first protective glass (5), and a first imaging surface (6) arranged sequentially; light emitted from the first projection lens passes through the first lens group (1), the second lens group (2), the first beam splitter (4), the first protective glass (5), and the first imaging surface (6), and forms an image on the first imaging surface (6). This invention, by setting up the lens group and specifying the material and number of lenses, solves the problems of low image quality, imbalance between lens size and mass, and excessive cost caused by projection over long distances.

The invention discloses a frequency divider system and a frequency division control method. The frequency divider system comprises: a radio frequency signal inlet connector for receiving an optical frequency comb signal; the frequency divider unit is connected with the radio frequency signal inlet connector, and the frequency divider unit comprises a plurality of frequency division stages; the VHF frequency band signal output connector is connected with the frequency divider unit and is used for outputting a VHF frequency band signal; the MCU controller is connected with the frequency divider unit and is used for controlling the frequency dividing ratio of a plurality of frequency dividing stages through GPIO (General Purpose Input / Output); and the low-frequency connector is connected with the MCU controller and is used for providing a power supply and a frequency division control signal for the system. The problems that an existing frequency divider is high in noise coefficient, low in processable highest frequency, low in dynamic range, difficult to adapt to complex and changeable application environments, low in processable input signal frequency, narrow in output frequency range, high in power consumption and high in cost and generally needs high-precision clock equipment can be solved.

The present invention discloses an ultra-high cycle stability amorphous selenide and its preparation method and application. Under room temperature stirring conditions, a polyoxometalate solution is adjusted to a neutral or alkaline pH value, and a hydrochloric acid dopamine solution is added to react to obtain metal-polydopamine; selenium powder is used to selenize the metal-polydopamine in an inert atmosphere to obtain a crystalline metal selenide; the crystalline metal selenide is doped with a heteroatom source that can form a doping atmosphere to obtain an amorphous heteroatom-doped metal selenide, that is, an ultra-high cycle stability amorphous selenide. The present invention is the first to propose a method for destroying the lattice structure by heteroatom doping to convert it into an amorphous form. The amorphous metal selenide negative electrode material has the advantages of many active sites, fast ion diffusion rate, extremely small volume expansion and good stability, and can be used as a new strategy to improve the electrochemical performance of secondary ion battery negative electrode materials.

The present invention belongs to the field of terahertz technology, and specifically relates to a miniaturized integrated terahertz transmitting and receiving probe structure. The probe structure includes a front panel, a rear panel, a photoconductive antenna, a fixed bracket, an off-axis parabolic metal reflector group, a fixed plate, a bottom plate, and a protective shell. The fixed bracket adjusts and fixes the angle of the photoconductive antenna, and the fixed plate adjusts and fixes the angle of the off-axis parabolic metal reflector. By adjusting the photoconductive antenna and the off-axis parabolic metal reflector group, the emission, collimation, convergence and reception of terahertz radiation are realized. The probe "folds" the previous planar optical path structure, reduces the volume of the terahertz transmitting and receiving module, has a compact structure, and is easy to carry, fix and use.

The utility model discloses a heat dissipation system of refrigeration and heating dual -purpose cup mat, including shell body and heat dissipation module, and heat dissipation module includes heat dissipation seat and heat dissipation fan, and heat dissipation seat includes the heat dissipation mounting panel for attaching installation semiconductor refrigeration piece, and the hot end of semiconductor refrigeration piece is attached to set up in the upper end surface of heat dissipation mounting panel, and the lower end surface of heat dissipation mounting panel is provided with heat dissipation fin group, and heat dissipation fin group includes a plurality of heat dissipation fins perpendicular to heat dissipation mounting panel, and a plurality of heat dissipation fins are arranged in parallel interval, and form the heat dissipation channel of through between the adjacent heat dissipation fin, and the characteristic is that heat dissipation fan is set up in the side of heat dissipation fin group and is sent air to heat dissipation channel. The advantage is simple structure, and the whole volume of cup mat and heat dissipation efficiency are realized at the same time.

The invention provides a head-up display device and a vehicle comprising the same, the head-up display device comprises an imaging unit, a reflector and a windshield of the vehicle, the windshield comprises a reflection area and a transmission area, the imaging unit forms a first light ray and emits the first light ray to the reflection area, the reflection area reflects the first light ray to form a second light ray, and the second light ray is emitted to the transmission area. The reflecting area reflects the second light to the reflecting mirror, the reflecting mirror reflects the second light to form third light, the reflecting mirror reflects the third light to the transmission area to form fourth light, the transmission area reflects the fourth light to the human eyes, and the fourth light forms a virtual image on the other side, opposite to the human eyes, of the windshield. According to the head-up display device provided by the invention, the volume of the light path can be compressed through multiplexing the light path and multiplexing the windshield reflection, and the volume of the head-up display device is reduced.

This utility model discloses a self-locking bolt connection structure for a speed reducer, including a motor and a speed reducer. Connecting parts are integrally connected to both sides of the motor output housing, and a positioning groove is provided between the two connecting parts. Positioning plates are integrally connected to both sides of the speed reducer housing, and an anti-loosening component is provided between the positioning plates and the motor housing. Threaded through holes are provided at all four corners of the speed reducer housing. A nut sleeve is threadedly connected to one end of each threaded through hole, and an internal thread groove is provided inside the nut sleeve. A locking bolt is threadedly connected to the other end of each threaded through hole, and an external thread post is integrally connected to the end of the locking bolt. The internal thread groove and the external thread post are compatible. Unlike traditional bolt structures that rely on friction for anti-loosening, this structure effectively resists preload attenuation caused by vibration through a dual mechanism of "threaded reverse self-locking" and "mechanical locking." The threaded reverse design automatically cancels out the loosening torque during vibration.

The invention provides a pressure sensor and a packaging method thereof, and relates to the technical field of pressure sensors. A first bonding body and a second bonding body are prepared respectively, one side of the first bonding body is provided with a first electrode layer and a pressure-sensitive area, and one side of the second bonding body is provided with a second electrode layer and a first cavity. And then the first bonding body and the second bonding body are bonded through a bonding process, so that the first electrode layer is in contact with the second electrode layer, the pressure-sensitive area and the first cavity are oppositely arranged, and a sealed cavity is formed. And finally, a second cavity is prepared and formed in the side, away from the second bonding body, of the first bonding body, a bonding pad is prepared and formed on the second bonding body, the second cavity and the pressure-sensitive area are oppositely arranged, and the bonding pad is communicated with the second electrode layer. According to the technical scheme, the point-to-point connection between the SOI substrate and the silicon wafer is realized by using the first electrode layer and the second electrode layer, the electrical performance and the space utilization rate of the pressure sensor can be greatly optimized, and the miniaturization requirement of the MEMS pressure sensor is particularly met.

The application discloses a kind of anti-expansion silicon-based negative pole and preparation method thereof, from inside to outside including foil, lithium supplement layer attached to both sides of foil, silicon-based active material layer attached to the outside of lithium supplement layer, amorphous carbon layer attached to the outside of silicon-based active material layer and the graphite layer of outermost side;The foil is porous foil, and the hole of porous foil is filled by lithium supplement layer;The thickness of amorphous carbon layer is 20-100 μm, and the area density of amorphous layer is 0.2-5 times of the area density of silicon-based negative pole coating.

The utility model relates to the technical field of pipeline exhaust, and provides a low-temperature water pipeline exhaust device which comprises a mounting seat, the mounting seat is used for being arranged on a water pipe, the mounting seat is provided with a mounting cavity, the mounting cavity is communicated with the water pipe, a butt joint pipe and an air outlet pipe are arranged in the mounting cavity, and an opening and closing assembly is arranged between the butt joint pipe and the air outlet pipe. The opening and closing assembly is used for controlling communication or non-communication of the butt joint pipe and the air outlet pipe, after the butt joint pipe and the air outlet pipe are not communicated, one end of the air outlet pipe is communicated with the mounting cavity, the other end of the air outlet pipe is communicated with the outside, and a mounting cap used for sealing the mounting cavity is arranged on the mounting base in a threaded mode. The cleaning assembly is used for cleaning blocked crystals in the air outlet pipeline. The problems that in the prior art, chemical agent cleaning easily corrodes the pipeline, the subsequent wastewater treatment cost is high, manual cleaning is time-consuming and labor-consuming, and the pipeline needs to be dismounted after shutdown are solved.

According to the shape memory alloy actuating valve provided by the utility model, the valve core accommodating cavity and the fluid cavity are arranged in the valve body, and the fluid cavity comprises the input space, the output space and the sealed space; a valve element which slides in the valve element containing cavity and is used for opening or cutting off communication between the input space and the output space in the sealed space is further arranged, an elastic piece in the valve body outputs elastic force which drives the valve element to cut off communication between the input space and the output space, and an SMA wire of the SMA driving part is further arranged to be wound around the valve element. Contracting or loosening of the SMA wire can be controlled according to whether the SMA wire is powered on or not, then deformation force for driving the valve element to overcome elastic force to open communication of the input space and the output space in a sliding mode can be output, the overall structure of the valve is simple, driving force of the SMA wire is large, the power-to-weight ratio is high, response is rapid, and the service life of the valve is prolonged. Compared with an electromagnetic valve, the volume and the weight occupied by the coil and the magnetic piece can be effectively reduced, and the problem that an existing electromagnetic valve is large in volume and weight is solved.

The embodiment of the invention discloses a projection light machine and wearable equipment. The projection light machine comprises a light source module, a light guide device, a light splitting device and a projection system. The light source module is used for emitting illumination light; the light guide device comprises a substrate, a coupling-in area and a coupling-out area, wherein the coupling-in area and the coupling-out area are arranged on the substrate. The light source module is located on the side, provided with the coupling-in area, of the substrate. The light splitting device is embedded in the substrate; the projection system is located on the side, away from the light source module, of the substrate. The illumination light enters the substrate through the coupling-in area and then is emitted into the projection system to form projection light, the projection light is reflected into the substrate, and the light splitting device is at least located on a propagation path of the projection light. The reflection area is used for reflecting the projection light rays and enabling the projection light rays to be totally reflected and propagated to the coupling-out area in the substrate, and the coupling-out area is used for coupling out the projection light rays.

A kind of composite manufacturing method of TC11 titanium alloy thin-walled cylinder, based on the idea of additive + welding composite manufacturing, according to the size and structure characteristics of workpiece, the complex shape part in thin-walled cylinder is prepared by selective laser melting, and the other part is prepared by machining of forgings.The additive + welding composite method is used to manufacture TC11 titanium alloy thin-walled cylinder, which solves the problem that the integration forming of large-size aerospace structure is limited by the volume of atmosphere cabin or vacuum chamber, realizes the optimization of processing resources, and takes into account the processing efficiency and material utilization.The addition of Cu and Mn powder promotes the composition of the solid-liquid front of the molten pool to be supercooled, thereby promoting the transformation of columnar crystal to equiaxed crystal, and equiaxed grains are obtained by additive manufacturing.The tensile strength of TC11 alloy after double annealing is 1285MPa, and the elongation is 9.5%.Laser welding method is used to realize the connection of additive manufacturing TC11 alloy and forged TC11 alloy, and the tensile strength of the welded joint is 1536.5MPa, and the fracture mode is plastic fracture.