911results about How to "Improve surface quality" patented technology

The invention provides an electromagnetic field composite powder feeding type plasma arc additive manufacturing formability regulation and control method and system, and relates to the technical field of plasma arc additive manufacturing. The flowing direction and speed of liquid metal in a molten pool in the deposition process are regulated and controlled through the target composite electromagnetic field, and the morphology and the internal organization structure of a deposition layer are controlled; in the process of regulating and controlling the liquid metal in the molten pool, process parameters and molten pool dynamic image data in the deposition process are collected in real time, and a pre-trained state recognition model is used for conducting self-adaptive adjustment on the process parameters of a subsequent deposition layer; and after deposition of each layer is completed, a laser scanning system is adopted for measuring the actual geometric size and surface appearance of the deposition layer, deposition manufacturing of the next layer is executed based on the optimized composite electromagnetic field control parameters, the corrected layered slicing data and the process path, and the execution is executed circularly till manufacturing of the whole workpiece is completed.

The invention discloses a dynamic control method for a complex curved surface five-axis numerical control machining tool vector, which comprises the following steps of: scanning the surface of a target workpiece by using a high-precision three-dimensional scanner to obtain point cloud data; based on the point cloud data, establishing a mathematical model S (u, v) of the target complex curved surface; a mathematical model based on the target complex curved surface; establishing a comprehensive dynamic model of the five-axis numerical control system; optimizing the initial tool posture in combination with the kinetic model; collecting dynamic operation data of the cutter and the workpiece; on the basis of the dynamic operation data, a model predictive control (MPC) algorithm is used for adjusting the machining path and the cutter direction in real time; according to the method, a comprehensive dynamic model of a five-axis numerical control system is established, dynamic coupling effects of a machine tool kinematic chain, cutter flexibility, cutting force, a temperature field and a stress field are brought into a unified framework, and complex dynamic behaviors are accurately described and controlled through multi-body dynamic modeling and an optimization algorithm.

The invention discloses a robot grinding real-time defect detection and self-adaptive correction system based on deep learning. The problem that in the prior art, real-time detection, defect correction and accurate path optimization are difficult to achieve in the grinding process is solved. The image, the three-dimensional point cloud and the moment data are fused through a multi-modal sensing system, and data fusion processing is performed by adopting a time synchronization mechanism, so that high-precision defect detection is realized. And the self-adaptive correction module dynamically adjusts the pressure, the speed and the angle of the grinding tool according to real-time feedback by using a reinforcement learning algorithm, so that accurate grinding for different workpiece surfaces is ensured. The system is further combined with closed-loop feedback control, the grinding path is continuously optimized, and the consistency and stability of the grinding quality are improved. Compared with the prior art, efficient and automatic defect detection and self-adaptive correction can be achieved on the complex and irregular workpiece surface, and the production efficiency and the surface treatment quality are remarkably improved.

The invention relates to an annealing-free alloy cold heading steel wire rod for a 12.9-grade bolt and a production method of the annealing-free alloy cold heading steel wire rod. The production process comprises the steps of molten iron pre-removal of P / S, electric furnace or converter smelting, external refining, bloom continuous casting, rolling into an intermediate billet and steel billet finishing, intermediate billet heating, high-pressure water descaling, rough rolling, intermediate rolling, pre-finish rolling, finish rolling, spinning, coil collecting and cooling. The annealing-free alloy cold forging steel wire for the 12.9-grade bolt comprises the following components in percentage by mass: 0.30%-0.35% of C, 0.10%-0.30% of Si, 0.70%-1.20% of Mn, 1.0%-1.5% of Cr, 0.15%-0.30% of Mo, 0.015%-0.030% of Al, 0.0030%-0.0080% of N, 0.01%-0.04% of Nb, less than or equal to 0.30% of Ni, less than or equal to 0.10% of Cu, less than or equal to 0.015% of P, less than or equal to 0.010% of S, less than or equal to 0.012% of (As + Sb + Bi), less than or equal to 0.0010% of O and the balance of Fe and inevitable impurity elements, the niobium-nitrogen product (Nb * N) is greater than On the premise that main alloy components are not reduced, a fine grain structure can be obtained under a certain condition by adding grain refining elements, and the delayed phase change effect the same as that of a low-temperature finish rolling process is achieved by utilizing the delayed phase change characteristic of the fine grain structure.

The invention discloses a water jet assisted laser-electrochemical combined machining method which comprises the following steps: pre-treating a nickel-based superalloy to be machined, and fixing the nickel-based superalloy on a machining table; a machining area is positioned, parameters of water jet assisted laser and electrochemical machining are set, so that during laser machining, water jet cools the machining area and removes slag, and an electrolyte does not affect a non-machining area; meanwhile, water jet assisted laser and electrochemistry are started to machine the nickel-based superalloy, and the machining state is monitored in real time; and after composite machining is completed, the nickel-based high-temperature alloy is cooled. By accurately setting laser, water jet and electrochemical machining parameters, the efficient synergistic effect of the laser, water jet and electrochemical machining parameters in a machining area is ensured, the machining precision and the surface quality are effectively improved, the defects of heat affected zones, microcracks, recast layers and the like are remarkably reduced, and the machining quality is improved. And meanwhile, corrosion to a non-machining area is reduced through the mode of spraying the electrolyte in a pulse mode.

The invention provides a machine vision-based titanium alloy VAR smelting molten pool edge-reaching control method, which comprises the following steps: after calibration and correction by using an industrial camera, collecting the molten pool morphology of a vacuum arc remelting furnace VAR; the obtained molten pool landform picture is processed, and the molten pool topography surface gray level image is divided into a bright area, a gradual change area and a dark area; extracting a sub-pixel edge by using a Canny operator and a Zernike moment, and fitting a molten pool edge by using a least square circle fitting algorithm; subtracting the obtained crucible edge from the molten pool morphology edge, and calculating to obtain the distance from the molten pool edge to the crucible; and comparing the obtained distance from the edge of the molten pool to the crucible with a threshold value, and judging whether the molten pool reaches the edge or not. Visual judgment of operators is replaced with machine vision, dependence on artificial experience is reduced, titanium alloy VAR smelting control is simpler and more convenient, VAR smelting is more intelligent and automatic, product stability is improved, cost is reduced, and product competitiveness is improved.

The invention discloses an aluminum alloy extrusion forming production process, which relates to the technical field of extrusion production, and comprises the following steps: designing an extrusion die, carrying out surface heat treatment on the extrusion die, selecting an aluminum alloy material, heating and extruding, carrying out surface treatment processing on a produced aluminum alloy profile, and packaging the aluminum alloy profile after the aluminum alloy profile is inspected to be qualified. Compared with the prior art, the method has the advantages that the grain structure of the profile can be more uniform and refined by accurately regulating and controlling the complex relation among parameters such as the extrusion temperature, the mold temperature, the extrusion speed and the lubricating condition, so that the mechanical property is enhanced, like a 6063 aluminum alloy profile, the tensile strength can be improved, the yield strength is improved, deformation or damage in the using process is effectively avoided, and meanwhile, the service life of the profile is prolonged. Good parameter matching can effectively reduce internal defects of the profile, metal can flow in a mold more smoothly, internal pores, cracks and other defects caused by non-uniform metal flow are reduced, and the surface quality is greatly improved.

The invention provides low-yield-ratio super-thick maritime work steel with excellent core low-temperature toughness and a manufacturing method of the low-yield-ratio super-thick maritime work steel, and belongs to the field of steel and iron material preparation. The low-yield-ratio super-thick marine steel with the excellent core low-temperature toughness comprises the following chemical components in percentage by mass: 0.10%-0.15% of C, 0.35%-0.45% of Si, 1.20%-1.50% of Mn, 3.00%-3.50% of Ni, 0.30%-0.50% of Mo, 0.15%-0.3% of Cr, 0.01%-0.02% of Ti, 0.030%-0.040% of V, 0.050%-0.060% of Nb, 0.0016%-0.0020% of B, 0.15%-0.25% of Cu, 0.060%-0.070% of Al, less than or equal to 0.010% of P, less than or equal to 0.004% of S, less than or equal to 0.39% of CET and the balance of Fe and inevitable impurities. According to the invention, a component design thought of a low-C, Ni-Nb-Mo-Al-B system is adopted, and a three-section rolling and quenching and tempering heat treatment process is combined. Through strict control of smelting continuous casting, controlled rolling and controlled cooling processes and quenching and tempering heat treatment parameters, the super-thick marine steel with excellent comprehensive mechanical properties is successfully prepared. The steel shows good low-temperature toughness in the core part, and meanwhile, the steel has a relatively low yield ratio. According to the low-yield-ratio super-thick maritime work steel with the excellent core low-temperature toughness, the thickness range is 80-150 mm, the yield strength is larger than or equal to 690 MPa, the tensile strength is larger than or equal to 920 MPa, the percentage elongation after fracture is larger than or equal to 20%, the yield ratio is smaller than or equal to 0.77, and the impact energy KV2 at the temperature of-60 DEG C is larger than or equal to 80 J.

The invention belongs to the technical field of numerical control machining, and discloses a machining method for a large titanium alloy ultra-deep-cavity thin-wall weak-rigidity complex structural part, which comprises the following steps of: 1, fixing a die forging blank on a clamp by utilizing a process table around the die forging blank; secondly, rough machining is conducted on the die forging blank, datum holes are machined in two of the process tables, and the side wall allowance of a side groove is distributed in a stepped mode after rough machining; thirdly, the roughly machined part is subjected to heat treatment; 4, the hole position of the reference hole is detected, the hole position is compared with the theoretical hole position to analyze the deformation amount and the deformation direction of the blank, and when the deformation amount is smaller than the machining allowance, semi-finish machining is conducted; and fifthly, the semi-finished part is subjected to finish machining, and a connecting rib between the final milling process table and the part is machined.

The invention discloses energy-saving high-pressure cleaning equipment for square and rectangular pipes, and relates to the technical field of high-pressure cleaning, the energy-saving high-pressure cleaning equipment comprises a main body frame, a cleaning module is mounted above the main body frame, a rotational flow collaborative cleaning mechanism is arranged in the cleaning module, and the rotational flow collaborative cleaning mechanism is used for changing a water flow mode to ensure internal and external water flow collaborative high-pressure cleaning; the introduced air conveying bin only surrounds the outmost periphery of the nozzle, air flow flows along spiral water flow on the outmost periphery of the nozzle after being discharged in a vertical flowing mode, through the design, the peripheral water flow obtains additional momentum under the action of wind power, and then the momentum is transmitted to the internal water flow through collision among fluid molecules; according to the process, redistribution of energy is achieved, energy of internal water flow is supplemented, and water flow impact force borne by the peripheral square and rectangular pipes and the internal square and rectangular pipes is more balanced through the effect of wind power on the peripheral water flow and transmission of the energy to the internal water flow.

The invention belongs to the technical field of aviation aircraft sheet metal part machining, and relates to a manufacturing method of a variable-curvature complex skin with a reinforcing bent edge and an n-shaped cross section. The technological process of stretching forming, numerical control milling and manual forming is used for replacing the single technological process of linear blanking, pressure falling forming, manual forming, appearance cutting and drilling, and two sets of newly-designed tools are matched for part forming and edge cutting. The problems of out-of-tolerance of the profile size, high labor intensity, poor surface quality, high rejection rate and the like in the forming process of the variable-curvature complex skin part with the n-shaped section are solved. In production, main deformation and edge milling of parts are completed through machining, product precision is improved, labor intensity of workers is remarkably reduced, the parts do not have large-area hammer marks, and surface quality is remarkably improved. The method can be used for machining large complex variable-curvature parts and can be widely applied to the field of aeronautical manufacturing.

The present invention relates to a heat treatment method for a high-strength, tough, lightweight, wear-resistant high-manganese steel casting, and the steps are as follows: pretreatment: coating an anti-oxidation protective coating on the surface of the high-manganese steel casting; water toughening treatment: heating the high-manganese steel casting to the water toughening temperature at a preset speed, keeping the temperature and then water quenching; cryogenic treatment: cooling the high-manganese steel casting after water toughening to the cryogenic treatment temperature and keeping the temperature; aging treatment: heating the high-manganese steel casting after cryogenic treatment to the aging temperature and keeping the temperature, keeping the temperature, and then air cooling to room temperature, and the interval between cryogenic treatment and aging treatment is not more than 1h; shot peening treatment: shot peening treatment is performed on the surface of the high-manganese steel casting after aging treatment. The present invention utilizes a combination of water toughening, cryogenic treatment and aging treatment to obtain a single austenite structure, obtain an effective dispersed nano-scale carbide structure, and effectively improve the grain refinement and solid solution strengthening effect of the high-strength, tough, lightweight high-manganese steel.

The invention relates to a red copper material as well as a preparation method and application thereof. The red copper material comprises the following components in percentage by mass: 10-100ppm of at least one element of Zr, Ca and La, and the balance of Cu and inevitable impurities, the grain size of the red copper material is 10-25 microns, the volume percentage ratio L of small-angle grain boundaries and the volume percentage ratio H of large-angle grain boundaries are controlled to be larger than or equal to 2.0 and smaller than or equal to 2.4, the small-angle grain boundaries are grain boundaries with the adjacent grain orientation difference smaller than 15 degrees, and the large-angle grain boundaries are grain boundaries with the adjacent grain orientation difference larger than 15 degrees. According to the method, through specific annealing and cold machining modes and addition of grain refinement elements, high-temperature abnormal growth of grains is inhibited, and meanwhile the surface quality of the red copper material is optimized. The ceramic copper-clad material prepared by taking the obtained red copper material as a substrate can be applied to the fields of automobile connectors, semiconductor coolers, high-power power semiconductor modules and the like.

The invention relates to a surface treatment method of rolled copper foil. The surface treatment method comprises the steps of degreasing, electrochemical corrosion and roughening. In the electrochemical step, the rolled copper foil serves as an anode, electrochemical corrosion treatment is conducted on the copper foil in an acid pretreatment solution, the defects of surface rolling lines, peeling and the like are removed, and the copper foil surface which is flat macroscopically and rough microcosmically is obtained. In the coarsening step, an additive is added into a coarsening solution, and fine copper particles are electroplated on the surface of the copper foil, so that the performance requirements of low roughness and high stripping resistance of the copper foil are met, and the use requirements of the high-frequency circuit board are met.

The invention discloses a weak-rigidity free-form surface monocrystalline silicon reflecting lens and a processing method thereof. The method comprises the following steps: obtaining a monocrystalline silicon block; cutting into blocks; diamond wire cutting; precisely grinding the back surface; performing slicing; the free-form surface sucker adsorbs the lens; precisely grinding the front surface into a cylindrical surface; polishing the magnetorheological elastomer; releasing the lens; the cylindrical sucker adsorbs the lens; precisely grinding and thinning the back surface; releasing the lens; cutting edges and carrying out wet etching on the back surface; and carrying out ion beam modification processing to achieve the final surface shape precision of the free-form surface. According to the X-ray reflecting lens machining method, the free-form surface weak-rigidity reflecting mirror is clamped and deformed into the cylindrical surface for machining, the whole process is ultra-precision grinding and polishing of the cylindrical surface, the machining method is simple and mature, the manufacturing cost is extremely low, dependence on an ultra-high-precision multi-axis linkage machine tool is completely eliminated, and the machining precision is greatly improved. And the machining efficiency is greatly improved, and the method is suitable for mass production of reflectors.

The invention belongs to the technical field of keel bending, and particularly relates to an automatic bending device for a light steel joist, which comprises a conveyor, a bending assembly is arranged above the conveyor, and the device is provided with the bending assembly, so that the light steel joist can be attached to the surface of the bending assembly to be subjected to pre-deformation bending treatment; the light steel joist is subjected to small-angle deformation before formal bending treatment, so that the resilience after edge folding can be reduced, the residual stress in the light steel joist can be released, the possibility of quality problems such as deformation and cracking caused by stress concentration is reduced, the structural strength and durability of the light steel joist are enhanced, and the service life of the light steel joist is prolonged. The stability and reliability of the whole structure are guaranteed, the internal stress distribution is more uniform and reasonable, so that the machining precision and the product quality are improved, the bending consistency of the light steel keel is guaranteed, manual intervention is not needed, the automation degree of the bending process is greatly improved, the labor intensity is relieved, and the production efficiency is improved.

The invention relates to the field of cutting devices, and discloses a noise reduction cutting device for metal part manufacturing, which comprises two bottom rails, a concave frame capable of sliding to adjust the position is arranged at the tops of the two bottom rails, a transverse moving structure is arranged at the top of the concave frame, and an up-down displacement structure is arranged at the lower end of the transverse moving structure. The lower end of the up-down displacement structure is connected with a laser cutting head, precise positioning of the laser cutting head in the horizontal direction can be achieved through sliding fit of a bottom rail and a concave frame and a transverse movement structure at the top of the concave frame, a second motor drives a first gear to be in meshing transmission with teeth, and the transverse movement distance of a motor sliding table can be precisely controlled. Therefore, the laser cutting head can conduct high-precision cutting on the metal piece according to the preset cutting path, good contour precision can be guaranteed when the metal piece in a complex shape is machined, machining errors are effectively reduced, and the product quality is improved.

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 provides a support-free forming method for laser powder bed melting, and relates to the technical field of metal additive manufacturing, and the horizontal support-free forming method for laser powder bed melting comprises the following steps: S1, printing a first-layer support-free overhanging surface by using an out-of-focus laser beam, so that a first-layer metal powder is in a sintering state, and a first-layer sintering layer is formed; s2, printing a predetermined number of layers of support-free overhanging surfaces layer by layer by using an out-of-focus laser beam, melting each new printing layer, remelting the previous printing layer, and avoiding remelting to the lower surface of the first sintering layer; and S3, after printing of the support-free overhanging surface with the preset number of layers is completed, subsequent layer printing is conducted. The first sintering layer is printed by using the out-of-focus laser beam, so that a supporting foundation is provided for a subsequent overhanging structure, and the problem of collapse of the first layer is avoided. Fusion and combination of each new printing layer and the previous printing layer are controlled, remelting to the lower surface of the first layer is avoided, the upper surface and the lower surface which are not supported are smooth, and powder adhesion is avoided.

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 discloses a silicon wafer polishing composition and application thereof. The silicon wafer polishing composition comprises silicon dioxide hydrosol subjected to special treatment, organic alkali, a pH regulator, an anionic water-soluble polymer and water. According to the silicon wafer polishing composition, the conventional alkaline silica sol is subjected to special treatment, particle residues on the surface of the polished silicon wafer can be greatly reduced, and compared with the prior art, the silicon wafer polishing composition has remarkable advantages.

The invention discloses an integrated preparation method of a large-thickness high-density electrical insulation-corrosion-resistant ceramic coating on the surface of a heat dissipation substrate for a high-power device, and relates to the technical field of surface treatment of aluminum alloys and composite materials thereof. The method comprises the following steps: placing a pretreated substrate as an anode and a stainless steel plate as a cathode in a basic arc suppression type electrolyte, and performing low-temperature soft plasma electrolytic oxidation on the surface of the pretreated substrate by using an asymmetric bipolar pulse micro-arc oxidation technology to grow a large-thickness high-density ceramic layer in situ; specifically, low-temperature soft spark discharge is induced by inserting additional negative pulse voltage, the plasma temperature and energy are stabilized, spark discharge is uniform, and the density is increased by an order of magnitude, so that continuous bombardment with no damage to the surface flatness as the plasma intensity upper limit is carried out on a passive film on the surface of a substrate; and the defects such as pores and cracks are continuously healed and repaired, and the densification of the coating is promoted, so that the aluminum oxide coating with large thickness, high density, high electrical insulation and corrosion resistance is obtained.

The invention belongs to the technical field of aviation aircraft sheet metal part machining, and relates to a manufacturing method of a variable-thickness multi-bent-edge thin-wall part with a reinforcing groove structure. According to the invention, the process method of numerical control milling blanking, sheet metal forming and chemical milling is adopted to replace the process method of numerical control milling and sheet metal forming. Mechanical cutting is replaced by chemical milling, two sets of newly-designed tools are matched for forming the reinforcing groove and the bent edge, the problems that a web is wrinkled and cannot be repaired and a thickness area is distorted and deviated due to forming of the reinforcing groove are solved, the accurate appearance of a part is finally obtained, and the surface quality is improved. The method has generalizability and can be widely applied to machining of complex molded surfaces and variable-thickness thin-wall parts, and the weight of an aircraft body is further reduced while the structural use requirement is met.

The invention relates to an automatic vertical ring rolling mill. The technical problems that an existing ring rolling mill is low in automation degree, and a core roller is prone to bending are mainly solved. According to the technical scheme, the automatic vertical ring rolling machine comprises a rack, a motor, a speed reducer, a main body rack, an oil cylinder base, a driving roller, a hydraulic oil cylinder, a machine body main shaft, a transmission shaft, a core roller bearing seat, a lower base, a fixed supporting seat, a core roller, a roller holding machine body, a bearing seat driving oil cylinder and a self-aligning roller bearing. A motor and a speed reducer are arranged at the upper end of the rack, the speed reducer is connected with one end of a transmission shaft, self-aligning roller bearings are arranged at the shaft diameter position of the transmission shaft, and the self-aligning roller bearings are installed on the upper portions of the two sides of the main body rack. The driving roller is installed on the transmission shaft, the lower end of the machine body spindle is connected with a nut arranged on the bottom face of the fixed supporting seat, the roller holding machine body is installed at the upper end of the main machine frame and connected with the hydraulic oil cylinder, and the core roller is installed on the core roller bearing seat which is arranged on the fixed supporting seat.

The invention relates to a packaging electrode, a manufacturing method thereof and a semiconductor packaging device. The manufacturing method comprises the steps that a diamond composite metal base layer is prepared, a first alloy layer and a second alloy layer are formed on the upper side surface and the lower side surface of the diamond composite metal base layer respectively, and a conductive flange is formed on the side wall of the diamond composite metal base layer; the diamond composite metal base layer, the first alloy layer, the second alloy layer and the conductive flange are of an integrated structure. The surfaces, deviating from the diamond composite metal base layer, of the first alloy layer and the second alloy layer are machining surfaces and are used for being in direct contact with a chip; the flange welding surface of the conductive flange is free of diamond composition. According to the invention, the forming quality and performance of the large-size packaging electrode can be improved, so that the packaging reliability of the semiconductor packaging device can be effectively improved.

The invention belongs to the technical field of 3-series aluminum alloys, and particularly relates to a 3xxx aluminum alloy and a preparation method and application thereof. By optimizing the content of Mn, Fe and other elements and combining the high-temperature homogenizing annealing process, the aluminum alloy material has high strength and machinability, meanwhile, the size of coarse intermetallic compounds is reduced through high-temperature rolling, distribution is more uniform, grains and textures are refined through the continuous intermediate annealing process, and the yield of the aluminum alloy material is improved. The alloy plasticity is improved, the anisotropy of the plate is reduced, and the battery shell yield is higher. Moreover, high-temperature homogenization and hot continuous rolling are integrated, so that the production time is shortened, and the production efficiency is improved. According to the method, a high-temperature short-time intermediate annealing process is adopted, the grain size in the 3xxx aluminum alloy plate strip is regulated and controlled to be 25-35 microns, the texture proportion of Cube is 2-3.5%, and the texture proportion of Goss is 3-5%, the alloy plasticity is improved, the anisotropy of the plate is reduced, and the surface quality of a battery shell can be effectively improved.

The invention discloses hardware automatic stamping equipment and method, and particularly relates to the technical field of hardware machining, the hardware automatic stamping equipment comprises a stamping machine, the stamping machine is composed of a rack and a spindle box, the spindle box is arranged on the rack and used for transmitting power in a reciprocating mode, a lower die base is installed at the stamping position of the stamping machine, and a stamping die is arranged at the output end of the stamping machine; the stamping die and the lower die base are arranged in a matched mode to complete stamping machining. Limiting and automatic discharging operation of hardware plates can be completed through the limiting frame, automatic feeding and discharging work of the hardware plates can be completed through cooperative work of the feeding mechanism and the limiting frame, the occupied area is small, construction is convenient, meanwhile, the pretreatment mechanism is arranged, and the pretreatment efficiency is improved. Pretreatment work of the hardware plate on the feeding mechanism and the lower die base can be completed step by step, the problem that the product quality of the hardware plate is affected by temperature rise of the lower die base is avoided, and the surface quality of the hardware plate is improved.

The invention discloses a glass fiber reinforced nylon material with high alcoholysis resistance, and relates to the technical field of glass fiber reinforced nylon materials. Raw materials of the high-strength and high-toughness composite material comprise the following components in parts by weight: 30-43 parts of PA46, 20-25 parts of PA66, 15-7 parts of PA115, 3-5 parts of bio-based nylon, 20-45 parts of alkali-free glass fibers, 1-3 parts of polyethylene, 0.5-3 parts of an antioxidant, 0.2-3 parts of a heat stabilizer, 0.1-5 parts of a compatilizer, 1-5 parts of a flexibilizer, 0.2-0.5 part of a hydrolysis-resistant agent, 1-2 parts of an ultraviolet light absorber, 0.1-2 parts of a silane coupling agent, 0.1-0.5 part of a nucleating agent, 1-5 parts of hollow glass beads and 3-8 parts of mica. The glass fiber reinforced nylon material is prepared by mixing the raw materials according to the set proportion and sequence, the glass fiber reinforced fiber material with high alcoholysis resistance is finally obtained, a small amount of mica is added into the matrix raw materials, the insulativity and heat resistance of the prepared glass fiber reinforced nylon material are improved to a certain extent, and the service life of the glass fiber reinforced nylon material is prolonged. The range of products made of the material is expanded, the stability of the products is improved, and the products can resist corrosion of strong acid and strong alkali.

The invention discloses a fabricated thermal insulation composite external wall panel, a preparation device and a preparation method thereof, and belongs to the technical field of composite wall panels. The fabricated thermal insulation composite external wall panel comprises a thermal insulation board, a reinforcing mesh is arranged outside the thermal insulation board and comprises a bottom mesh, a top mesh and a side mesh, the bottom mesh is located below the thermal insulation board, the top mesh is located above the thermal insulation board, the top mesh and the bottom mesh are fixedly connected through the side mesh, and the thermal insulation board is located in the reinforcing mesh defined by the bottom mesh, the side mesh and the top mesh; and a mortar layer is arranged outside the reinforcing mesh, convex blocks are arranged on one side of the mortar layer in the length direction and the width direction of the wallboard, and grooves matched with the convex blocks are formed in the other side of the mortar layer. By the adoption of the assembly type heat preservation composite external wall panel, the preparation device and the preparation method, the problems that an existing heat preservation composite external wall panel is heavy in weight, and a heat preservation layer is prone to damage can be solved, and the forming effect and the structural stability of the wall panel are improved through the preparation device and the preparation method.

The invention relates to the technical field of machining, in particular to a multi-material combined deep hole machining method, a positioning block, a cutter and a part. Through rough machining of the bottom hole in the single-piece state, the difficulty of direct machining after multiple materials are combined is effectively reduced, the machining efficiency is improved, and the precision of the hole diameter is guaranteed. The roughly machined bottom holes of all the assembly parts are aligned and positioned, the deep holes to be machined are machined through a reaming milling cutter, and reamed holes are obtained; the axis deviation of the hole can be corrected, and an accurate reference is provided for subsequent machining. A reamer is used for machining a reamed hole, and a reamed hole milling cutter in a rear guiding mode is used for machining; deflection and vibration in the machining process are effectively restrained in the process, and the quality of machined holes is guaranteed. And the pre-machined deep hole is machined through a front guiding type reamer, so that the hole diameter of the pre-machined deep hole is enlarged to the target hole diameter, and machining of the multi-material combined deep hole is completed. The problems that in the prior art, machining precision is poor and efficiency is low in deep hole machining of various material combinations are solved.