1288 results about "Generatrix" patented technology

Disclosed in the present invention is a large complex ellipsoidal part machining deformation control method based on dynamic cutting planning. The method comprises: performing initial clamping on a blank part, constructing a machining coordinate system, completing reference non-contact measurement and reference surface fitting of inner and outer shape surfaces of the blank part, and completing the division of a generatrix tangent plane; on the basis of product feature decomposition, completing in the same coordinate system the comparison between each theoretical section and an actually measured section, completing cutting evaluation based on the generatrix tangent plane in a machining area, and guiding overall machining route planning and local machining route planning; on the basis of route planning and a cuttable margin, using an adjustable support device to complete part clamping based on dynamic adjustment, so as to realize stable cutting under a variable cutting thickness, and thereby solving the problem of overall deformation control of a large complex ellipsoidal part; and completing high-rib feature twist amount identification in combination with adjustable support, and completing tool path trajectory offset compensation on the basis of a relationship between a circumferential offset and an allowance, and thereby realizing precise compensation machining of a mesh after a local twist. The present invention solves the key difficulties of high-rib local twist deformation compensation and overall deformation control on the basis of ensuring the precision of the residual wall thickness during numerical control machining of a large complex thin-walled ellipsoidal part, thereby further improving the overall manufacturing reliability of a large complex ellipsoidal part.

The invention relates to a shock-absorbing structure, in particular for a motor vehicle, having a main direction of shock absorption, and having at least one profiled member made of composite material containing reinforcing fibers, this profiled member having a substantially cylindrical shape having a straight-line generatrix, this straight-line generatrix being oriented in the main direction of shock absorption.

The invention discloses a rotating body ancient building part model reconstruction method based on a least square method, and relates to the technical field of model reconstruction analysis, and the method comprises the steps: obtaining ancient building part point cloud through employing a three-dimensional laser scanning technology; the historic building part point cloud is sliced and projected to a horizontal plane, a circle is fitted by using a least square method, circle center coordinates are extracted, and the position of a rotating shaft is determined. According to the method, the precision of model reconstruction is effectively improved by accurately extracting the rotating shaft and fitting the rotating generatrix, high-precision point cloud data is obtained by using a three-dimensional laser scanning technology, and accurate extraction of the rotating shaft and the rotating generatrix is ensured through the steps of slicing, projection, least square fitting and the like; a non-uniform rational B-spline curve is adopted to fit a rotating bus, the rotating bus is rotated around a rotating shaft to reconstruct a three-dimensional model, the three-dimensional model of the ancient building part model is parameterized, the geometric accuracy of the model is further improved, and the reconstructed model can more accurately reflect the actual shape and size of the ancient building part.

The invention discloses a spinning forming method for a large-length-diameter-ratio variable-wall-thickness complex curved generatrix shell, and belongs to the technical field of metal pipe plastic machining. The specific process comprises the operation processes of blank size determination, primary machining, fixture and spinning roller determination, spinning forming, heat treatment and the like, the outer contour of a middle straight section is clamped, and then the two ends are subjected to hole shrinkage and thickening spinning. Through the machining mode that the two ends of the pipe are closed and subjected to die-free spinning, the defects and difficulties of common forging, extrusion and welding combined forming at present are overcome, the forming efficiency is improved, materials are saved, and the material utilization rate is high. Meanwhile, due to the fact that welding treatment is not conducted, heat treatment process operation is conducted finally, and the comprehensive mechanical property of a final finished product is more stable. The method is suitable for forming operation of various large-length-diameter-ratio variable-wall-thickness complex curved generatrix shells, and a reliable forming method can be provided for shell forming of spaceflight, weapons and the like.

The invention provides a double-curved-surface hole wall rotational flow umbrella oil nozzle for low-carbon fuel and a machining method, and relates to the technical field of gas turbine fuel injection. The nozzle comprises a needle valve, a needle valve seat, a spraying hole and a rotational flow groove; the needle valve and the needle valve seat form a sealing conical surface, the inner wall face of a spraying hole of the curved-surface rotational flow umbrella spraying nozzle is a double curved surface, the double curved surface and the sealing conical surface form a ruled surface, the rotational flow groove is formed in the inner wall face of the spraying hole, and the direction of the rotational flow groove is the generatrix of the ruled surface. The inner wall face of the spraying hole is designed to be the curved face, fuel is better guided to flow in the oil nozzle, the area of a low-pressure area is reduced due to sudden change of the direction in the fuel flowing process, and therefore cavitation is restrained from occurring and developing, and the phenomena that the spraying hole is blocked and mist spraying is unstable due to cavitation are improved; the rotational flow grooves in the curved surface can be achieved through the electric spark machining technology, the machining difficulty is reduced, meanwhile, the turbulent kinetic energy and the radial momentum of fuel can be effectively improved, spray distribution is more uniform, and the atomization quality is improved.

An airless tire to optimise the mass and stiffness of the shear strip thereof. The tire has a radially inner membrane (41), a shear structure made up of a plurality of shear elements (5), and a radially outer membrane (42) positioned at a mean radial distance H from the radially inner membrane (41). Any shear element (5) of the plurality of shear elements has a main portion (50) having in any circumferential plane (XZ) a non-radial generatrix (G) having a radially inner end (I1) positioned at a distance d1 from the radially inner membrane (41) and a radially outer end (I2) positioned at a distance d2 from the radially outer membrane (42) and the generatrix (G) of the main portion (50) of the shear element (5) has a curvilinear length L at least equal to 1.25*(H−(d1+d2).

A lifting gear includes a lifting frame movable relative to a supporting part of the lifting gear in a movement direction. The supporting part is arranged on and connected to a base plate, at least one linear guide, at least one bus bar, and a gear rack are fixed in place on the supporting part, an electric motor is situated in the lifting frame, a toothed wheel meshes with the gear rack and is connected in a torsionally fixed manner to a shaft of the electric motor, and a lifting part is connected to the lifting frame. The perpendicular projection of the lifting part onto a plane whose normal direction is aligned in parallel with the movement direction is included in, i.e., for example, encompassed by, the perpendicular projection of the base plate onto this plane.

The invention discloses a curved-surface cylindrical part hydraulic forming device and method, and relates to the technical field of cylindrical part forming, the curved-surface cylindrical part hydraulic forming device comprises a die and a pressurization system, and the die comprises a male die and a female die; the female die is annular, at least part of the male die can be arranged in the female die, an annular gap between the male die and the female die is used for containing a barrel blank, a forming curved surface is constructed outside the male die or in the female die, and under the state that the barrel blank is placed, a closed inner cavity is formed between the male die and the barrel blank, and a closed outer cavity is formed between the female die and the barrel blank. The forming curved surface is a cavity wall of the inner cavity or the outer cavity; fluid channels communicated with the inner cavity or the outer cavity are formed in the male die and the female die; the pressurization system is used for filling pressure fluid into the inner cavity and the outer cavity and controlling the pressure difference between the outer cavity and the inner cavity, the invention further provides a curved-surface cylindrical part hydraulic forming device and method, and the forming size precision of the multi-layer rotary cylindrical part with the curved generatrix characteristic can be improved.

The invention discloses a free curve feature design optimization method, which comprises the following steps of: constructing a free curve feature region containing a central bus, and setting the direction and the position of the central bus to obtain a free curve feature region; a two-dimensional coordinate transformation formula is adopted to transform the free curve characteristic area from a global coordinate system to a local coordinate system with a central bus as an X axis, and bending control of the structure in any direction is achieved; a height function is utilized to describe changes of a longitudinal boundary, an implicit modeling mode is adopted to construct a region boundary with a longitudinal coordinate smaller than a height function value, and adjustability of the longitudinal form of a feature region is achieved by controlling parameters of the height function. The method has the advantages that through free curve feature modeling, flexible expression of a complex structure form and precise boundary control are achieved; meanwhile, by taking control parameters as design variables and combining an iterative optimization algorithm, the structural layout is optimized, the performance is improved, the boundary is ensured to be clear, and dual optimization of the structural performance and the design freedom degree is achieved.

A tailor-welding, spinning and variable-wall-thickness forming method for a large-sized extension section of a liquid propellant rocket engine, which belongs to the technical field of metal forming. The method comprises: performing laser numerical control machining on a GH3044 superalloy to obtain two chord-tangent circles; performing electron beam welding to obtain a complete circle; performing a vacuum solid solution treatment; performing pre-forming to obtain a shallow dish shape; performing a vacuum solid solution treatment; assembling a variable-wall-thickness flat blank and a spinning mandrel of a first spinning die, and then performing spinning on a spinning machine to form a curved generatrix variable-wall-thickness blank part; performing a vacuum solid solution treatment; and assembling the curved generatrix variable-wall-thickness blank part and a spinning mandrel of a second spinning die, and then performing spinning on the spinning machine to form a curved generatrix variable-wall-thickness part. The present invention is mainly used for the manufacturing of an ultra-large-sized GH3044 extension section of the liquid propellant rocket engine, which has a diameter of 1200 mm and a length of 1500 mm, and the product precision reaches a wall thickness tolerance of + / -0.05 mm for each point and a surface profile of ≤3 mm.

The utility model relates to the technical field of punching, in particular to a bus punching machine convenient to debug, which comprises an operation table, an extrusion plate, a limiting rod, a rotating shaft, a rotating disc, a tool bit and the like, a limiting rod is connected to the right side of the top of the operation table, an extrusion plate is slidably connected to the limiting rod and is driven by a hydraulic cylinder to move in the vertical direction, a rotating shaft is rotatably connected to the position, close to the middle, of the top of the operation table and penetrates through the extrusion plate, and a rotating disc is connected to the lower portion of the rotating shaft. At least three tool bits are installed on the outer side of the rotating disc in an annular array mode. According to the utility model, the plurality of tool bits are arranged on the rotating disc, when the tool bits need to be replaced, the required tool bits are selected through the control panel, the rotating shaft can be driven to rotate through the servo motor, and the selected tool bits are driven to rotate to a station through the rotating disc, so that the tool bits can be rapidly and accurately replaced.

The invention relates to the technical field of flywheel energy storage, and discloses an SOC estimation method for a flywheel energy storage array system. According to the method, running parameters such as flywheel rotating speed and bus current are synchronously collected through a multi-source sensing unit, a dynamic parameter observation model is input to estimate dynamic characteristic parameters, and the model dynamically adjusts observation weight based on historical data. And inputting the dynamic characteristic parameters into a multi-model fusion algorithm to generate a fused state feature vector, wherein the algorithm distributes fusion coefficients according to spatial relevance of each flywheel unit. And correcting the state feature vector deviation by using an error correction model to obtain an SOC estimation result, and storing the SOC estimation result. The method also relates to the steps of model construction, data acquisition and processing, algorithm optimization and the like. The method can improve the SOC estimation precision, is suitable for complex working conditions, guarantees the data integrity and safety, and is of great significance to the development of the flywheel energy storage technology.

The invention discloses a shaft parallelism error detection method and related equipment, and relates to the technical field of parallelism, and the method comprises the steps: obtaining the diameter data of a reference shaft and a to-be-detected shaft; based on the diameter data, determining a first diameter variable quantity of the reference shaft and a second diameter variable quantity of the shaft to be measured; acquiring the busbar displacement variation of the to-be-measured shaft; and determining a parallelism error between the reference axis and the to-be-measured axis based on a combination relationship among the first diameter variation, the second diameter variation and the bus displacement variation.

The invention relates to the technical field of spring quality detection, in particular to an online intelligent detection method and system based on a spring integrated punch forming part, and the method comprises the steps: marking a plurality of reference points, and preparing a conical blank; determining whether the pre-pressed inner circle is qualified or not based on the first ring distance standard deviation, and determining whether the pre-pressed outer circle is qualified or not based on the second ring distance standard deviation; the pressure distribution of the male die in the main pressing process is adjusted based on the judgment result that the deviation of the pre-pressing inner circle and the deviation of the pre-pressing outer circle are consistent; preparing a semi-finished spring, determining a plurality of cone generatrixes, and compensating a mold gap according to the angle deviation proportion of the cone generatrixes; preparing a finished spring, and optimizing pressure distribution according to the thickness standard deviation of the finished spring; the system comprises a data acquisition module for acquiring data, a data preprocessing module for preprocessing the acquired data, and a detection control module for controlling an online detection process. The production quality of the spring is improved.

The invention provides a water turbine runner crack additive repair trajectory planning method based on a regular trapezoidal groove, and relates to the technical field of hydroelectric power generation equipment crack repair, and the method comprises the steps: obtaining a trapezoidal groove grid bottom tangent plane based on a region growth algorithm, and carrying out the layer-by-layer slicing of the trapezoidal groove through the tangent plane; obtaining a section contour of the trapezoidal groove, and segmenting the contour of the trapezoidal groove by using tangential features of contour points; extracting a boundary curve in the generatrix direction of the trapezoidal groove, and generating a continuous and smooth parameterized spline curve by using a spline curve interpolation method; equally-spaced track points between the two spline curves are obtained based on an isoparametric method, and the track points are connected to form an additive track in the trapezoidal groove. Geometric modeling, a parameterized spline curve theory and additive manufacturing are organically combined, and accurate trajectory planning under the special geometric structure of the trapezoidal groove is achieved.

The invention relates to a design method of a steel structure hyperbolic cooling tower, which comprises the following steps of: drawing concentric circles based on the bottom radius, the top radius and the throat radius of the cooling tower, taking one point on each circle, enabling three points to be collinear, enabling a connecting line of the points on two large circles to be tangent to a smaller circle, and drawing a plane geometry relation graph by taking the circle center of the concentric circles as an original point of a coordinate system; an equation set is listed according to a plane geometrical relation graph, coordinates of points on two large circles can be obtained by solving the equation set, namely, bus and endpoint coordinates and reverse bus and endpoint coordinates of the cooling tower can be obtained, n arrays are made by the reverse buses and the bus around the central axis of the cooling tower, m intersection points are formed by a set after the reverse buses are arrayed and the bus, and m intersection points are formed by the intersection points and the bus. The number of layers of the cooling tower is m-1, and the difference of Z-direction coordinates of adjacent intersection points is the layer height of each layer of the cooling tower; the set behind the bus array and the set behind the reverse bus array form n intersection points at the elevation of each layer, and the intersection points of the two sets of each layer are connected in sequence to form a closed state.

The invention relates to enclosures (1) for gas-insulated medium-voltage or high voltage apparatuses. A connection portion (4) between a first end (20) of the first enclosure tube (2) and a mating machined second end (30) of the second enclosure tube (3) has a gas-escape path (L) running from the inside (6) to the outside (7) of the enclosure tubes (2, 3). According to the invention, the gas-escape path (L1) is shaped to have a first segment (L1) running along an at least partially axial direction of the enclosure (1) and being equipped with least one sealing ring (5; 5a, 5b). In addition, a slim ring-like snap-on bracket (9) can be used. The direct machining of the mating enclosure ends (20, 30) allows to omit conventional flanges. The partially axial orientation of the gas-escape path (L) allows to provide plural sealing rings (5; 5a, 5b) in series in the gas-escape path (L).

The invention belongs to the technical field of ships, and discloses a parabola-shaped rotary air duct for a ship. The parabola-shaped rotating air duct for the ship comprises an air duct body, the air duct body is rotationally installed on a deck of the ship, the air duct body extends in the vertical direction, the air duct body is a rotating body, the generatrix of the air duct body is a parabola, and the parabola serves as the generatrix to enable the air duct body to be in the shape of a cylinder contracting towards the two ends. Under the same thrust, the height of the air duct body is obviously reduced, meanwhile, the gravity center of the air duct body is obviously reduced, the stability of the air duct body and a ship is improved, and the air duct can easily pass through a height limiting area; the radius of the contact face of the air duct body and the deck is smaller, the occupied area of the deck can be reduced, and arrangement and port operation are easier.

To provide a terminal board and a manufacturing method of the terminal board, which are capable of improving assemblability with respect to a housing.SOLUTION: A terminal board 1 includes a bus bar 10, a housing 20 provided with an insertion space part 21 into which a second connection part 12 of the bus bar 10 is inserted along an axial direction X, a packing 30 that is inserted into the insertion space part 21 together with the second connection part 12 and seals an annular space between an outer surface of the second connection part 12 and an inner surface of the insertion space part 21, and a packing holder 40 that has a bus bar insertion part 41 through which the second connection part 12 is inserted along the axial direction X, and which is inserted into the insertion space part 21 in a state in which the second connection part 12 is inserted into the bus bar insertion part 41, the other end surface 40a in the axial direction X is in contact with the packing 30, and one end surface 40b in the axial direction X is in contact with a planar part 13a.SELECTED DRAWING: Figure 5

The invention belongs to the technical field of riveting fastening, and discloses a method for obtaining and applying the relation between riveting force and riveting displacement of an electric riveter, and the method comprises the steps: collecting bus current information through a collection module, and synchronously obtaining the displacement information of a rivet in a riveting process; a pressure sensor is arranged through an experiment to collect actual riveting force information and displacement information; establishing a polynomial mathematical model between the actual riveting force and the bus current of the driving motor through polynomial fitting; and the fitting result of the polynomial mathematical model is converted into the relation between the riveting force and the riveting displacement. According to the method, a motor torque control model is established, a multi-order polynomial fitting method is adopted, the relation between motor bus current and riveting force is obtained, and the riveting force and riveting displacement of a riveter in the riveting process are recorded in real time and transmitted to an upper system; the problems that an electric hand riveter needs to be provided with a force or torque sensor, otherwise, riveting force and riveting displacement in the riveting process cannot be recorded, and riveting quality monitoring and quality backtracking cannot be achieved are solved.

The present invention belongs to the technical field of microelectromechanical systems, and discloses a conformal MEMS friction sensor for measuring the surface friction of a conical model and an assembly method thereof. The conformal MEMS friction sensor includes a packaging housing, a head structure and an interface circuit; the packaging housing protects the head structure and the interface circuit through an upper and lower locked packaging cover plate and a packaging base. The conformal MEMS friction sensor is installed on the surface of the conical model perpendicular to the generatrix of the conical model, directly measures the surface friction in the direction parallel to the generatrix, and performs friction measurement with automatic deduction of the pressure difference resistance. The assembly method includes the assembly of the silicon-glass microstructure and the interface circuit, the assembly of the floating element, and the assembly of the packaging housing. The conformal MEMS friction sensor for measuring the surface friction of the conical model and the assembly method thereof of the present invention have the characteristics of small volume, good temperature stability, high reliability, etc., and can accurately measure the frictional resistance on the surface of the conical model.

The invention is suitable for the technical field of tapered-straight composite shell ring processing, and provides a processing method of an integrated tapered-straight composite shell ring, which comprises the following steps: S1, cutting and blanking a steel plate according to the size of the tapered-straight composite shell ring, and cutting out a plate material; s2, preparation work before machining is conducted on the plate material, wherein the preparation work at least comprises groove machining, two-side edge pre-bending and generatrix, symmetric center line and step line drawing; s3, according to the drawn step line, pressing forming is conducted on the plate through a top pressing type plate bending machine, and a formed workpiece is of a composite structure of a semi-cylindrical pipe section and a semi-conical pipe section; s4, the formed workpiece is shaped; and S5, the two shaped workpieces are folded and welded, and the conical and straight composite shell ring is formed. Therefore, not only is the specific process problem of the integrated cone-straight composite shell ring in the bending forming process solved, but also the core advantages of no annular weld joint, high continuity and high performance pursued by the integrated design are achieved by guaranteeing the manufacturing precision and consistency of the integrated cone-straight composite shell ring.

The invention discloses a method for designing a high-uniformity Fresnel lens with equal-width receiving areas, which comprises the following steps of: dividing a receiving surface of the Fresnel lens into a plurality of receiving areas with equal width, and establishing an energy equation of each receiving area and the Fresnel lens; based on the energy equation and a preset condensation ratio, determining the number of ring teeth of the Fresnel lens corresponding to each receiving area; determining a critical value of the ring tooth inclination angle of the Fresnel lens, and determining the focal length of the Fresnel lens according to the critical value of the ring tooth inclination angle; and designing a lens generatrix, and obtaining a size parameter of each ring tooth in the Fresnel lens corresponding to each receiving area. According to the invention, equal energy density distribution on the receiving surface is taken as a design idea, and the receiving surface is divided into a plurality of receiving areas with the same width so as to design parameters of each ring tooth of the Fresnel lens, so that high-uniformity distribution of energy density is realized, and the problem of non-uniform energy distribution on the receiving surface after condensation of the Fresnel lens is solved.

The ink-jet printing device comprises a printing trolley, a supporting cross beam, a supporting clamp of a rotating mechanism, an automatic angle adjusting device of the rotating mechanism and a control system, in the printing process, a spray head is located above a to-be-printed area, and when the to-be-printed object rotates by one circle, the spray head is located above the to-be-printed area; the nozzle steps by a fixed distance along the bus direction of the to-be-printed object, the fixed distance is N times of the distance between two pixel points in the resolution of the to-be-printed image, N is a positive integer, the nozzle continuously jets ink droplets to form an image-text in the stepping process, and the to-be-printed object rotates at a constant speed around the rotation center axis of the to-be-printed object while ink is jetted. According to the dynamic micro-deviation printing mode, the printing efficiency is improved while the inkjet effect is guaranteed, and the dynamic micro-deviation printing mode can be used for printing various curved-surface objects.

The invention discloses a one-way weaving method and equipment for a composite material S-shaped air inlet channel cylinder, and relates to the technical field of composite material weaving. A one-way weaving method for a composite S-shaped air inlet duct cylinder comprises the following steps that a weaving core mold is designed according to the geometric shape of the S-shaped air inlet duct cylinder, and a moving track generatrix of the weaving core mold is designed; according to the layer laying angle design requirement of the S-shaped air inlet channel cylinder, the robot motion control system drives the weaving core mold to do reciprocating motion along the moving track generatrix, the process parameters of the two-dimensional weaving machine and the single yarn winding machine are controlled, the surface of the weaving core mold is coated with a one-way weaving layer and a 90-degree yarn layer, and a weaving prefabricated body is obtained; and carrying out vacuum infusion, resin curing and demolding treatment on the woven prefabricated body to obtain the finished product S-shaped air inlet channel cylinder. The surface of the weaving core mold is coated with the one-way weaving layer and the 90-degree yarn layer, so that the in-plane mechanical property of the S-shaped air inlet channel cylinder can be improved, the annular pressure bearing capacity of the S-shaped air inlet channel cylinder is enhanced, and light weight is achieved.

The invention discloses an anti-loose structure nut and a using method thereof, and the anti-loose structure nut is composed of an upper nut and a lower nut; one end of the upper nut is of a conical surface structure, and the inclined angle of the conical surface structure relative to the central axis of the upper nut is 16 degrees; a groove is formed in the conical surface structure; the upper portion of the lower nut is an inner taper hole, the lower portion of the lower nut is a straight hole, and the included angle between inclined generatrixes on the two sides of the inner wall of the inner taper hole is 16 degrees. The diameter of the inner taper hole is smaller than that of the conical surface structure. The using method comprises the following steps that (1) the lower nut is screwed into the bolt penetrating into the interlayer; and (2) screwing the upper nut into the inner taper hole of the lower nut by adopting a hexagonal wrench. The device is simple in structure and easy to process and manufacture; common carbon steel or stainless steel materials are adopted, so that the manufacturing cost is low; the locking torque is large and stable, and the anti-loosening performance is excellent; during installation, the locking torque can be adjusted according to actual requirements; and the locking torque is stable and reliable, and can be repeatedly disassembled and used.

The invention discloses a large-convexity logarithmic curve superfinishing guide roller design and roller machining method, and relates to the field of bearing design and machining. The problem that the generatrix shape of a roller machined through an existing superfinishing test is difficult to meet the product design requirement is solved. The method comprises the following steps of: 1, deducing a logarithmic curve function formula according to a formula and a convexity value given by a product drawing; 2, designing and machining a logarithmic curve guide roller; 2, designing an ultra-precision guide roller bus shape grinding drawing according to the derived logarithmic curve formula; 2, the outer diameter generatrix of the ultra-precision guide roller is ground according to the grinding drawing; step 3, carrying out superfinishing test and detection on the outer diameter of the roller; 3, calculating the distance between the guide rollers; the distance between the guide rollers is calculated according to the diameter of the guide rollers, the diameter of the roller and the pressure angle gamma between the center line of the roller and the connecting line of the two guide rollers; (3) (2) superfinishing parameters of the outer diameter of the roller are set; and 3, detecting the convexity and the shape of the bus. The method is used for designing and machining the cylindrical roller bearing.

The invention discloses a free-form surface lens design method and system based on spherical iteration. The method comprises the following steps: constructing an initial lens structure; constructing a non-uniform irradiation weight factor; calculating coordinates of all surface points on the generatrix based on a spherical iteration method; calculating adjacent surface points in the latitude direction by using a spherical surface iteration method; fitting in the longitude and latitude directions in the spatial point cloud by using a B spline curve to form a curved surface grid of the outer surface of the lens; performing curved surface fitting on a lens curved surface grid based on a least square method to form a lens outer surface molded surface, splicing a set hemispherical inner surface with the lens outer surface, constructing a lens entity for optical simulation verification, and returning to adjust the non-uniform irradiation weight factor if it is judged that a simulation result deviates from expected illumination irradiation. And if not, outputting a lens entity result. According to the method, the iteration deviation angle is reduced through spherical iteration, and the design period of the free-form surface lens is shortened.

To provide a terminal block capable of absorbing a tolerance between a first connection terminal and a second connection terminal.SOLUTION: A terminal board 1 includes a bus bar 10, a housing 20 provided with an insertion space part 21 into which a second connection part 12 of the bus bar 10 is inserted along an axial direction X, a packing 30 that is inserted into the insertion space part 21 together with the second connection part 12 and seals an annular space between an outer surface of the second connection part 12 and an inner surface of the insertion space part 21, and a bus bar insertion part 41 through which the second connection part 12 is inserted along the axial direction X. A packing holder 40 that is inserted into the insertion space part 21 in a state where the second connection part 12 is inserted into the bus bar insertion part 41 and the packing 30 is supported in the axial direction X is provided, and the first connection part 11 is configured to include a notch part 15 for allowing deformation of the first connection part 11.SELECTED DRAWING: Figure 6

The invention provides a high-precision positioning method and system for a solid insulation tubular busbar embedded foundation. The method comprises the following steps: respectively carrying out fine construction on a transformer, a switch cabinet and a prefabricated cabin embedded foundation according to first, second and third types of standards based on an electrical layout diagram; acquiring a basic point cloud by using a portable laser scanner, and performing multi-station complementary scanning, denoising and densifying in case of shielding; registering and fusing the point cloud and the equipment graph in the BIM, automatically fusing when the deviation is smaller than a first threshold value, semi-automatically correcting when the deviation is between two threshold values, and manually intervening when the deviation is larger than a second threshold value; simulating a pipe bus path in the combined three-dimensional model, automatically optimizing conflicts, and re-planning if the curvature does not conform to; flexible connection is arranged between the end of the transformer and the outlet of the prefabricated cabin, and the flexible connection is prolonged or customized according to deviation selection standards. The construction precision and efficiency of the solid insulation tubular busbar embedded foundation can be improved, the stability and reliability of equipment installation are enhanced, the operation and maintenance cost is reduced, and the overall operation quality of a transformer substation is improved.