1330results about How to "High dimensional accuracy" patented technology

The invention discloses a thermal deformation prediction and optimization method and system in metal plastic composite product processing, and the method comprises the steps: building a composite product geometric model according to the material characteristics and preset boundary conditions of a composite product; according to the geometric model of the composite product, a finite element analysis method is used, a preset time step length and a nonlinear solver are selected for coupling solving of a thermal field and a mechanical field; the change data of the temperature field and the stress field along with time and thermomechanical circulation are analyzed through simulation, accumulated deformation and interface stress data of the material in circulation of the preset number of times are monitored, and a simulation prediction result is generated; and according to the simulation prediction result, the heating and cooling rate and the mold loading path are optimized. The thermal deformation prediction and optimization method in metal plastic composite product processing can be used for solving based on multi-physics field coupling in combination with a nonlinear finite element.

The invention discloses a raw material of a near-zero shrinkage silicon-based ceramic core and a preparation method thereof, the raw material of the ceramic core comprises refractory material powder, zirconium silicate powder and metal zirconium powder, and the refractory material powder, the zirconium silicate powder and the metal zirconium powder are mixed according to the proportion to form the raw material of the ceramic core; ceramic core raw materials are added into liquid paraffin to form ceramic core slurry, the ceramic core slurry is used for obtaining a ceramic core biscuit through a hot-pressing injection molding method, and the ceramic core biscuit is subjected to powder burying sintering to obtain the ceramic core. Volume shrinkage generated in the sintering process of the ceramic core is made up through in-situ synthesis oxidation expansion of the metal zirconium powder, meanwhile, shrinkage of the ceramic core can be made up through generated zirconium dioxide due to the phase change effect, near-zero shrinkage of the silicon-based ceramic core in the sintering process is achieved under the dual effects of in-situ oxidation and the phase change effect, and the silicon-based ceramic core has the good sintering performance. Meanwhile, the generated zirconium dioxide improves the room-temperature bending strength and the high-temperature bending strength of the ceramic core.

The invention discloses a machining control method, device and system based on a five-axis machining machine tool and a medium. The method comprises the steps that geometrical characteristic parameters of a to-be-machined workpiece and tool characteristic information are obtained, a cutting force model is established according to the obtained geometrical characteristic parameters, and cutting force distribution conditions under different paths are calculated; in the cutting force model, based on the cutting force distribution condition and the geometric feature parameters, generating an optimal cutter path corresponding to the cutter feature information by using a path optimization algorithm; according to the generated tool path and tool feature information, establishing a simulation environment of the five-axis machining tool, and simulating motion states of the tool in different paths; in the simulation environment, setting a reward function including path smoothness and cutting force stability; using a reinforcement learning algorithm to optimize the fairness of the tool path, and generating a smooth tool path; verifying the generated smooth tool path in a simulation environment; and triggering a processing execution instruction. The machining precision and the surface quality are improved.

The invention discloses a conformal antenna component manufacturing system and method based on cross-scale space-time frequency shaping femtosecond laser, and belongs to the technical field of micro-nano machining. The system comprises an ultrafast laser excitation module, a laser pulse time / frequency shaping module, a pulse detection module, an online monitoring module and a focusing high-speed scanning galvanometer module. By means of the system, high-selectivity, large-breadth and three-dimensional precision machining of conformal antenna circuit patterns is achieved, and it is ensured that a substrate is not damaged. The femtosecond laser time-frequency shaping technology is combined in the machining process, layered scanning and accurate removal of the heterogeneous multilayer structure are achieved through an adjustable pulse sequence and a high-speed galvanometer system, and the problems that in the prior art, materials are damaged, and the size precision is low are solved. The device further integrates an on-line depth monitoring function, the machining efficiency and the forming quality are remarkably improved, and the device is suitable for high-precision patterning machining of complex curved surface heterogeneous thin film materials.

The invention relates to a manufacturing method of a small-caliber nickel-copper alloy seamless heat exchange tube. The manufacturing method comprises the steps that S1, a UNS N04400 round steel material is subjected to peeling, PT inspection, shearing, centering, grinding, heating, perforating, water cooling and inspection; s2, a hot-punched blank is only cleaned, and inspection is conducted after point grinding is conducted after internal and external polishing; s3, the obtained pipe blank is subjected to first-pass intermediate product cold rolling, deoiling, straightening, pipe cutting, grinding, inspecting and cleaning; s4, second-pass intermediate product cold rolling, deoiling, heat treatment, straightening, pipe cutting, grinding, inspection and cleaning are conducted; S5, finished product cold rolling is conducted; s6, deoiling a finished product; s7, heat treatment of a finished product; s8, straightening a finished product; s9, performing ultrasonic vortex treatment, water pressure treatment and pipe cutting on a finished product; and S10, finished product surface inspection, size inspection, cleaning, mark spraying and finishing procedures are carried out. The method has the advantages of high one-time inspection qualification rate, yield and dimensional precision of products, good inner and outer surface quality, stable structure performance and high practicability.

The invention discloses a manufacturing method of a UNS N06690 alloy seamless heat exchange tube, which belongs to the technical field of material processing, and comprises the following steps of: (1) performing peeling, PT inspection, shearing, centering, grinding, heating, perforating, water cooling and inspection on a round steel material; (2) carrying out acid pickling on the hot-punched blank, and then carrying out incoming material inspection and inner and outer surface grinding; (3) two-pass intermediate product cold rolling is carried out, and after cold rolling, intermediate product deoiling, intermediate product heat treatment, intermediate product straightening, intermediate product pipe cutting, acid pickling, intermediate product grinding and repairing and intermediate product inspection are carried out; (4) carrying out finished product cold rolling; (5) deoiling a finished product; (6) performing heat treatment on a finished product; (7) straightening a finished product; (8) carrying out finished product ultrasonic eddy current, water pressure and pipe cutting, sampling during pipe cutting, and carrying out physical and chemical tests; and (9) the obtained steel pipe is subjected to the procedures of finished product surface inspection, size inspection, cleaning, mark spraying and finishing and finally packaged and warehoused, and the product produced through the method is high in one-time inspection qualification rate and high in yield.

The invention relates to an elevation control and precise regulation and control method for frozen sand mold additive manufacturing in a time sequence space. According to the method, a mathematical model that the thickness of floating sand changes along with time due to moisture heat exchange of the frozen sand mold in air is established, and the thickness of the floating sand of frozen sand molds with different curved surfaces under the parameter conditions of different environment temperatures, time scales, sand mold materials, moisture contents and the like is predicted and fed back; and in the freezing printing process, real-time adhesive and height compensation is carried out on sand molds at different wall thicknesses, and the dimensional precision and geometric precision of the frozen sand molds are protected to a certain extent. According to the method, the problem of dimensional accuracy error caused by floating sand generated by heat exchange in air in the manufacturing and subsequent placing processes of the frozen sand mold is effectively solved, and the dimensional accuracy of the sand mold during casting is ensured.

A precise rolling device with a real-time detection function is used for correction and detection after a shell is assembled and comprises a moving assembly, a rolling assembly and a detection assembly, the moving assembly comprises a horizontal moving mechanism, and a lifting mechanism is installed at the output end of the horizontal moving mechanism; the rolling assembly comprises a mounting plate, the upper end face of the mounting plate is connected with the output end of the lifting mechanism, an air cylinder is fixed to the lower end face of the mounting plate, a pressure sensor is mounted at the lower output end of the air cylinder, the output end of the pressure sensor abuts against a roller mechanism, and the roller mechanism is slidably connected with the mounting plate through a guide rod. According to the utility model, the rolling device with the detection assembly is adopted to carry out real-time height detection on the shell, so that the rolling parameters can be adjusted according to the detection result while manpower is saved, and the size precision of shell assembly is further improved. The pressure sensor is matched with the air cylinder to dynamically adjust the pressure of the rolling wheel on the shell, so that the stress of the shell is always kept constant, and the machining flatness of the shell is improved.

The invention discloses a processing method of a spinneret plate, which comprises the following steps: acquiring a plate material, and pretreating the plate material to obtain a blank of the spinneret plate; the blank is installed on an automatic punching machine tool, punching is conducted on the same position of the blank for at least three times, modification treatment is conducted after punching of the blank is completed every time, and the spinneret plate is obtained. The invention further discloses the lyocell spinneret plate. According to the spinneret plate, the same position in the spinneret plate blank is subjected to multiple times of punching and other operations, spinneret orifices formed through multiple times of punching are low in roughness and higher in size precision, meanwhile, the strength of materials in the orifices is enhanced, and the problems that in spinning production, yarn breaking and doubling are likely to happen, adhesion is likely to happen, and the plate replacement cleaning difficulty is large can be solved.

The invention relates to the technical field of metal material processing, and particularly discloses a high-performance hot work die steel and a manufacturing process thereof, the process comprises the following steps: obtaining size data of a steel ingot, processing the data to obtain a deformation score of the steel ingot, and evaluating an abnormal condition of the steel ingot; acquiring temperature distribution data and stress distribution data in the heat treatment process; based on the abnormal condition of the steel ingot, comprehensively analyzing the temperature distribution data and the stress distribution data to obtain an influence score; marking the steel ingot based on the influence score, and adjusting production process parameters accordingly; according to the method, the dimensional change and the internal stress distribution in the steel ingot heat treatment process are monitored in real time and accurately controlled, and dynamic optimization of heat treatment process parameters is realized, so that the dimensional precision of the steel ingot is effectively improved, deformation in the heat treatment process is reduced, and finally, the overall performance of the die steel is improved, and the service life of the die steel is prolonged.

The invention belongs to the technical field of material preparation, and aims to solve the problem that the comprehensive performance of a material is affected by non-uniform microstructure of the material due to the fact that the distribution and grain size of each phase in a metal ceramic matrix are difficult to accurately control in the conventional preparation process of the metal ceramic material. Therefore, the invention provides the preparation method of the fiber-reinforced metal ceramic material, and the preparation method comprises the following steps: pretreating silicon carbide fibers; mixing and grinding the titanium metal powder and the silicon carbide ceramic powder according to a preset proportion; adding silicon carbide fiber particles and putting the mixture into an ultrasonic mixer; adding a dispersing agent and a binding agent and mixing again; sequentially carrying out cold isostatic pressing molding and hot pressing molding on the mixture; and sequentially carrying out pre-sintering, high-temperature sintering, cutting and surface treatment on the obtained green body. The strength, toughness, hardness, high temperature resistance, wear resistance and corrosion resistance of the prepared metal ceramic material are remarkably improved, the high-performance requirement of the aviation field can be better met, and powerful support is provided for the aviation industry.

The invention discloses a manufacturing method of an ultra-large seamless steel pipe with the diameter of 2000 mm, and belongs to the technical field of seamless steel pipe manufacturing in the metallurgical industry. The method comprises the following steps: heating a solid round tube blank, carrying out skew rolling by adopting a micro-expanding process to obtain a pierced billet, manufacturing the pierced billet into a hollow billet with an expanded diameter by utilizing a skew rolling expanding process, further expanding the diameter by using a flattening skew rolling process and simultaneously improving the dimensional precision and the surface quality of the hollow billet, and obtaining a semi-finished steel tube with the diameter of 2000mm by adopting a controlled rolling sizing process. And the semi-finished steel pipe is subjected to heat treatment, flaw detection and finishing procedures to directly obtain the ultra-large seamless steel pipe finished product of 2000 mm According to the method, materials are formed through one-time heating, only pipe blank heating is needed, heat treatment and reheating are not needed, energy is saved, and performance is improved; the on-line structure regulation and control method taking controlled cooling as the core thoroughly turns the passive situation that seamless steel pipes excessively depend on alloying and off-line heat treatment in the past, breaks through the bottleneck of the traditional process, and develops a new process and a new method for high-quality and high-efficiency manufacturing of the steel pipes.

The invention discloses a high-precision part machining path planning method based on artificial intelligence optimization, and the method comprises the following steps: generating a first three-dimensional geometric model of a to-be-machined part, carrying out the curved surface division, and obtaining a manufacturing feature point according to a division result; determining a processing placement surface for the first three-dimensional geometric model according to the manufacturing feature points, and performing processing element positioning and shaping to obtain a second three-dimensional geometric model; processing path preliminary planning is carried out, optimization is carried out based on mixed # imgabs0 # equilibrium by using a neural network, and a second planning processing path is output; performing path optimization based on a Gaussian distribution function and a cubic # imgabs1 # spline curve to obtain a third planning processing path; and simulation verification is carried out, path adjustment and optimization are carried out by adopting a hierarchical optimization ant colony algorithm according to a verification result, and a final planning processing path is output. The precision, the efficiency, the flexibility and the adaptability in the high-precision part machining process are improved.

The utility model discloses a pressure injection molding mold, which is characterized in that a fixed mold comprises a fixed mold seat, a fixed mold plate fixed on the fixed mold seat and a fixed mold core fixedly arranged on the fixed mold plate, and a concave fixed mold cavity is formed on the fixed mold core; the movable mold comprises a movable mold base, a movable mold plate fixed on the movable mold base, and a movable mold core fixed on the movable mold plate; the movable mold core is provided with a movable mold base and a movable mold plate, the ejector plate can slide in the mold closing direction and is installed between the movable mold base and the movable mold plate, the ejector rod is fixedly installed on the ejector plate, the ejector reset spring provides elastic retaining force towards the movable mold base direction for the ejector plate, and the oil cylinder is fixedly arranged on the movable mold plate. The oil cylinder can drive the ejector plate to move towards the movable mold plate, so that the ejector rod ejects a bearing pad blank to be subjected to pressure injection of a composite wear-resistant layer in the movable mold cavity towards the fixed mold, and an ejector roller on an injection molding machine prevents the ejector plate from moving along with the movable mold base during mold opening, so that discharging is achieved. And stable development and timeliness of the project are ensured.

The invention relates to a production line for continuous production of sofa iron stands, which comprises an upper wheel die holder, a lower wheel die holder is clamped at the bottom end of the upper wheel die holder, a driving shaft is fixedly connected to the inner ends of the upper wheel die holder and the lower wheel die holder, and a workpiece is arranged at the outer end of the upper wheel die holder in a contact manner. The top end of the bending arm is in sliding connection with a hydraulic sliding block, the top end of the hydraulic sliding block is in sliding connection with a servo sliding block, the resilience force of a bent workpiece can be monitored through the detection device, accurate bending compensation is conducted, the resilience phenomenon of the workpiece caused by material characteristics is effectively compensated, and the size precision of a finished product is improved; according to the bending compensation device, the product quality and consistency are guaranteed, the stress relieving assembly conducts induction heating on the bent portion of the workpiece during bending compensation, internal stress is eliminated, secondary springback is prevented, meanwhile, the possibility that the workpiece deforms in the follow-up use process is reduced, the durability and reliability of the product are enhanced, and the overall performance of the product is improved.

The invention relates to the technical field of flat wire stator head twisting equipment control, and discloses a process calculation method and system of flat wire stator head twisting equipment and the head twisting equipment, and the method comprises the steps: obtaining a plurality of setting parameters of a head twisting process input by a user; calculating according to the plurality of setting parameters to obtain an operation result; inputting an operation result into a point set formula of each layer of the torsion head module to obtain a data set, wherein the point set formula comprises a parameter equation and a compensation equation of spatial displacement; and writing the data set into a control file of a preset path, and performing a head turning process on the flat copper wire after the flaring process based on the control file. According to the invention, the motion trail of the equipment is approximate to the motion trail of the copper wire bending point, the copper wire is prevented from being scratched due to large relative displacement between the head twisting die and the copper wire bending point, the process trail of the product equipment and the model changing calculation can be quickly carried out, the device can adapt to the production of flat wire products with different specifications, the production efficiency is improved, and the production cost is reduced. The processing time is reduced.

The invention belongs to the field of FPCs (Flexible Printed Circuit), and particularly discloses a reinforcing method of an FPC. According to the method, the boundary dimension of an FR4 reinforcing plate is designed to be 1.2 mm larger than the boundary dimension of a to-be-reinforced area on an FPC, then the FR4 reinforcing plate and the to-be-reinforced area on the FPC are sequentially attached and solidified to obtain a stacked plate, finally the stacked plate is sequentially subjected to rough punching and fine punching with the single-side allowance being 0.05-0.2 mm, and the FR4 reinforcing plate and the to-be-reinforced area on the FPC are sequentially subjected to rough punching and fine punching with the single-side allowance being 0.05-0.2 mm. And an FPC reinforcing product with the FR4 reinforcing plate having the same boundary dimension as the to-be-reinforced area on the FPC is obtained. According to the method, the defects of scraps and burrs generated in a conventional punching method can be overcome, the size precision and the qualified rate of products are improved, and the yield of the products and the machining quality stability of the products are improved.

The invention discloses a preparation method of a rapidly-cured expanded graphite-based fuel cell composite bipolar plate, which comprises the following steps: cutting soft cut carbon fiber foam with a three-dimensional structure into the size of the bipolar plate, immersing into liquid resin for 10-30 minutes, and drying in a vacuum drying oven at 25-40 DEG C; and putting the pre-cold-pressed expanded graphite as a top layer and a bottom layer of the bipolar plate into a mold under the pressure of 10-15 Mpa, putting the soft cut carbon fiber foam resin into a middle layer, heating to 90-150 DEG C under the pressure of 10-15 Mpa, keeping for 110 seconds to 58 minutes, and demolding to obtain the composite bipolar plate of the fuel cell. The hot press molding method is simple, the plane conductivity of the prepared bipolar plate reaches 375.8 S / cm, the maximum bending pressure reaches 88.53 N, the bending strength is 61 Mpa, the air tightness is 2.32 * 10 <-8 > cm < 3 > cm < 2 > s <-1 >, the water contact angle is 92 degrees, the corrosion-resistant current is 0.345 mu A / cm < 2 >, and large-scale production can be achieved.

The invention relates to the technical field of mold ejection, and discloses a using method of a mold stripping ejection structure for a plastic forming mold, the mold stripping ejection structure comprises a fixed base, the two sides of the top of the fixed base are fixedly connected with fixed baffles correspondingly, the tops of the fixed baffles are fixedly connected with a first connecting frame, and the top of the first connecting frame is movably connected with a second connecting frame; the top of the second connecting frame is movably connected with a third connecting frame, when a mold is manufactured, an inverted buckle structure opposite to the mold opening direction is avoided as much as possible, and if the inverted buckle structure cannot be avoided, other design modes such as changing an inverted buckle into a slope structure can be considered, so that demolding can be smoothly performed during mold opening, and a simple product shape is designed; according to the invention, complex curved surfaces and corners are reduced, so that the mold manufacturing difficulty can be reduced, zero-degree mold stripping can be realized, a proper parting surface position can be selected, products can be smoothly separated during mold opening, the parting surface is selected at the maximum outline of the products as much as possible, and complex parting surface shapes are avoided.

The invention discloses a 3D printing foaming part, a preparation method thereof and application of the 3D printing foaming part in the field of foaming shoe materials, and relates to the technical field of thermoplastic elastomer foaming material processing. According to the preparation method of the 3D printing foaming part, firstly, the foaming wire melt is obtained through a specific extrusion technology, the diameter of the wire melt is controlled in the extrusion process, then the wire melt is controllably stacked under driving of 3D printing equipment, and parameters in the stacking process are adjusted. According to the method for preparing the 3D printing foaming part, a grid structure can be formed through controllable stacking, the plane-shaped part is prepared, the obtained part is moderate in foam hole size, the tensile breaking strength reaches up to 35 N or above, the true density is as low as 0.7 g / cm < 3 > or below, the product is suitable for the field of shoe materials, the extrusion process of the obtained part is stable, the size error is 35 microns or below, and the product has the good application prospect. And the size precision is higher.

The invention relates to the technical field of aluminum alloy materials, and discloses a high-strength regenerated aluminum alloy profile for an automobile anti-collision beam and a preparation process of the high-strength regenerated aluminum alloy profile for the automobile anti-collision beam, and the profile is 6063 alloy and comprises the following raw materials in percentage by mass: 45-55% of waste aluminum and 0.3-0.6% of Si; 0.5%-0.8% of Mg; 0 to 0.1 percent of Zn; 0 to 0.08% of Cu; 0 to 0.08% of Mn; 0.2%-0.45% of Fe; 0.01%-0.06% of Ti, and the balance Al and impurities with the content lower than 0.05%. The profile is obtained by carrying out casting, homogenization, extrusion, straightening, solid solution treatment and aging treatment on raw materials. According to the high-strength regenerated aluminum profile prepared through the scheme, the adding proportion of the waste aluminum can reach 45%-55%, the highest Fe content can reach 0.35% of the upper limit in the range of GB / T 3190-2020, the technical bottleneck that under the condition of the high waste proportion, the Fe element is excessive, thick intermetallic compounds are easily formed, and consequently the formability of the profile is poor is broken through, and harmless or beneficial conversion of the Fe element is achieved. And the section bar obtained by the scheme is a regenerated aluminum section bar with higher strength, high forming performance and low carbon emission factors, and unification of technology, economy and environment is realized.

The invention discloses a device and a method for eliminating residual stress of a whole bottom of a storage tank of a spaceflight carrier rocket. The device is characterized by comprising a liquid nitrogen conveying system (2), a whole rocket tank bottom (3), a water cooling system (4), a whole bottom flange ring fixing block (5) and a convex mold (6), the whole bottom flange ring fixing block (5) is used for fixing the whole rocket tank bottom (3) to the convex mold (6), and the liquid nitrogen conveying system (2) is used for introducing liquid nitrogen into the outer molded surface of the whole rocket tank bottom (3) according to a set value. And the water cooling system (4) is used for introducing liquid water into different positions of the inner molded surface of the whole bottom (3) of the rocket storage tank through water filling channels according to requirements, and establishing a temperature gradient from inside to outside, so that tank bottom cooling and liquid-solid phase change of water are realized, bulging is generated, and internal stress is eliminated. According to the device and the method, the box bottom can be locally cooled and bulged according to needs, and the purpose of meeting the size precision and performance requirements of the whole bottom is achieved.

The invention discloses a high-yield laminated mold, and relates to the technical field of molds, the high-yield laminated mold comprises a middle mold base, external mold bases are slidably connected to the two sides of the middle mold base, mold cavities are formed in the two sides of the middle mold base, and hot runners communicating with the mold cavities are installed in the middle mold base; a cavity is formed in the middle mold base, an ejector pin penetrating through the middle mold base and extending into the cavity is slidably connected into the middle mold base, a boss is fixedly installed in the ejector pin, a positioning column used for being connected with a nut in a sleeved mode is fixedly connected to the boss, and the sealing unit comprises a sleeve and a piston plate which are slidably connected into the positioning column. The larger the internal pressure of the first sealing ring is, the tighter the first sealing ring and the inner wall of the nut is, plastic in a molten state is prevented from entering threads of the nut under the pressure, after a material is cooled and shaped, the roller and the first sealing ring can automatically restore to the original shape, the force needed by demolding ejection of a product is reduced, and the ejector pin can eject the product perfectly and conveniently.

The invention discloses an integrated front cabin manufacturing method, an integrated front cabin structure and a lower vehicle body assembly with the integrated front cabin structure. The integrated front cabin manufacturing method comprises the steps that pouring liquid is poured into a front cabin mold, and vacuumizing operation is conducted on the tops of shock absorption tower molds on the left side and the right side of the front cabin mold, the left side and the right side of the rear portion and the middle portion of the front cabin mold and a feeding pipe of the pouring liquid; and pouring liquid overflowing from the top of the damping tower mold is guided out to a cinder ladle. The front cabin manufactured through integrated die casting is only provided with one part and has high integration, good lightweight performance, good front cabin size precision and excellent collision performance, the vehicle body rigidity and torsional rigidity of the white vehicle body are effectively improved, manufacturing is convenient, and the forming performance is excellent.

The utility model belongs to the technical field of tailor-welding equipment, and particularly discloses a robot welding tool for a hard pipe in a hydraulic pipeline system. The welding tool comprises a bottom plate, a mounting box, a first fixing set and a second fixing set. The bottom plate is horizontally arranged; the mounting box is arranged on the bottom plate and is provided with two parallel vertical plates; the first fixing set and the second fixing set each comprise a limiting piece arranged on the bottom plate, a supporting piece arranged on the mounting box and a pressing piece, two pipe openings of the hard pipe are limited and fixed through the two fixing sets, and tailor-welding machining of the two ends of the hard pipe and the connecting pieces can be achieved. The hydraulic hard pipe welding device can greatly improve the welding efficiency of hard pipes, ensure the welding quality, guarantee the size requirement of products and reduce the production cost, and can be widely used for machining different complex hydraulic hard pipe pipelines.

The utility model relates to a lock tongue drilling device which comprises a rack, a lead screw driving mechanism, a working bottom plate, a feeding guide rail, a material receiving air cylinder, a material receiving sliding block, a feeding air cylinder, a material pushing block, a discharging air cylinder, a push rod, a positioning block, a drilling device and a material pressing air cylinder. The positioning block is provided with a workpiece groove used for positioning the spring bolt, the rear side of the workpiece groove is provided with a through hole used for the push rod to stretch in, the front side of the workpiece groove is provided with an opening used for the spring bolt to enter, and the right side of the working bottom plate is provided with a product outlet. According to the device, the full-automatic process from automatic receiving of the spring bolt to drilling machining to output of a finished product is achieved, manual operation links are greatly reduced, the labor cost is reduced, meanwhile, the working bottom plate is driven to move front and back through the lead screw driving mechanism, multiple hole positions on the side face of the spring bolt can be drilled at a time, and the machining efficiency is improved. And the processing efficiency of the spring bolt is greatly improved.

The invention relates to an inner cylinder casting forming method which comprises the steps that a casting sand core is divided into at least four layers for independent 3D printing, the first layer is a bed mould core (110), the second layer is a vertical pipe outer contour core (120), the third layer is an inner cylinder outer contour core (130), and the fourth layer is a cover core (140), so that an outer contour structure of a casting is formed; for an inner cavity structure of a casting, two vertical pipe cores (210) and a tire hanging core (220) are designed and printed, the tire hanging core (220) is further split into a tire hanging core main body (221) and four cores (222), and the four cores (222) are areas with high sand burning risk on the tire hanging core (220) and are formed by printing chromium ore materials. According to the scheme, the application range of the sand core 3D printing technology in the casting field can be expanded, and particularly the effective application of the sand core 3D printing technology on large-size and complex-structure products such as inner cylinders can be achieved.

The invention discloses a relay, which comprises a shell, a magnetic circuit part, a contact part and a pushing part, and is characterized in that the magnetic circuit part is mounted on the shell and comprises at least two magnetic circuit units; the contact part is arranged on the shell and comprises a movable spring group, a static contact group and a load terminal; the movable spring groups and the static contact groups are arranged corresponding to the magnetic circuit unit, and each movable spring group is provided with a movable contact group corresponding to the static contact group; each movable spring group and the corresponding static contact group jointly form a switch; the movable spring group and the static contact group in each switch are respectively connected with different load terminals, and at least one load terminal is shared by at least two switches and forms a common terminal; and the pushing part comprises a pushing piece accommodated in the shell, the pushing piece and the magnetic circuit unit are correspondingly arranged, and the pushing piece is driven by the corresponding magnetic circuit part to drive the corresponding movable spring group, so that the movable contact group and the corresponding static contact group are closed or opened. By adopting the technical scheme, the occupied space is smaller than that in the prior art for realizing the functions of more than two switches.

The invention belongs to the technical field of aluminum alloy processing, and particularly relates to a manufacturing method of a high-strength aluminum-lithium alloy plate, a non-homogenized casting blank is subjected to ultralow-temperature rolling, high-temperature rough rolling, ultralow-temperature finish rolling and aging treatment, the casting blank is made of aluminum-lithium alloy, the rolling temperature of ultralow-temperature rolling and ultralow-temperature finish rolling ranges from-196 DEG C to-100 DEG C, the temperature of high-temperature rough rolling ranges from-20 DEG C to-30 DEG C, and the temperature of high-temperature rough rolling ranges from-20 DEG C to-30 DEG C; the rolling temperature of the high-temperature rough rolling is 360-480 DEG C, and the total deformation is not less than 80%; the aluminum alloy plate is finer in crystal grain, higher in strength, better in ductility, higher in forming precision and better in surface quality.

The utility model relates to the technical field of building materials, and discloses a wood-based X-type dot matrix sandwich structure which comprises an upper panel, a lower panel and an X-type dot matrix core layer, the X-type dot matrix core layer is composed of a plurality of X-type dot matrix structures, the X-type dot matrix structures are symmetrically distributed about the center line of the whole structure, and the X-type dot matrix structures are arranged on the upper panel. A plurality of bayonets are formed in one side of each X-shaped lattice structure, the two vertically-distributed X-shaped lattice structures are oppositely distributed and are mutually embedded and locked through the bayonets, and the X-shaped lattice core layer is bonded with the upper panel and the lower panel through an adhesive; the wood-based X-type dot matrix sandwich structure is formed by matching the X-type dot matrix core layer composed of the X-type dot matrix structures with the upper panel and the lower panel, the gap space of the dot matrix sandwich structure is reserved to the maximum extent, wood resources are saved, the wood use amount is reduced, the X-type dot matrix core layer composed of the integrated X-type dot matrix structures is high in strength and easy to assemble, and the wood-based X-type dot matrix sandwich structure has the advantages of being simple in structure and convenient to use. The weight is light, and the construction industry is facilitated.