136 results about "Angle alpha" patented technology

The invention discloses a method and a system for correcting a monitoring result after deflection of an inclinometer pipe in foundation pit monitoring, and the method comprises the steps: projecting X / Y axial displacement deformation of different depths in an inclinometer pipe hole and a guide groove azimuth angle alpha i of different depths in the inclinometer pipe hole relative to a direction vertical to a foundation pit to the direction vertical to the foundation pit; and displacement deformation correction values of different depths in the inclinometer pipe hole are obtained. The horizontal displacement variation of the inclinometer hole calculated by using the correction method provided by the invention can truly reflect actual displacement change data of each layer of an enclosure or a soil body towards one side of a foundation pit when the inclinometer pipe is twisted.

The invention relates to a scanning system which comprises a scanning device (1) and a processing device (2), the scanning device (1) is configured to scan a detected object (3) moving relative to the scanning device (1), an included angle alpha between a scanning plane (11) of the scanning device (1) and the advancing direction of the detected object (3) is an acute angle or an obtuse angle, and the processing device (2) is in signal connection with the scanning device (1). The processing device (2) is configured to receive an image scanned by the scanning device (1) and perform stretching or compression processing on the scanned image according to a reference part on the detected object (3), and the reference part is always perpendicular to the advancing direction of the detected object (3) in the advancing process of the detected object (3). According to the invention, the dependence of the image processing process on the traveling speed of the detected object can be effectively reduced, the configuration of a speed measuring device is reduced, and the scanning inspection cost is reduced.

The utility model relates to a device easy for 90-degree forming in a small progressive die. The device consists of three parts, namely a stripper plate insert, a forming insert and a forming punch, the angle of the left side of the bottom of the stripper plate insert is a negative angle of 90-alpha degrees, and the stripper plate insert is made of DC53 die steel subjected to vacuum heat treatment and HRC 58-62 degrees; the right side angle of the upper part of the forming insert is a negative angle of 90-alpha degrees, and the forming insert is made of DC53 die steel subjected to vacuum heat treatment and HRC 58-62 degrees; the forming punch is made of DC53 die steel subjected to vacuum heat treatment and HRC 58-62 degrees. According to the utility model, firstly, 90-degree forming only needs one working step, so that the appearance of the die is small, and the die is more beneficial to production on a small punching machine; and secondly, the negative angle of 90-alpha degrees is formed in the insert, and the angle alpha is used for counteracting the defect of material resilience, so that 90-degree forming becomes easier, and the machining can be realized without increasing procedures.

The invention relates to a manufacturing method of a microprism reflective film die integrating two triangular pyramids and a reflective film, and the manufacturing method of the die comprises the following steps: 1, respectively rotating a die base material on a B-axis rotary table to 0 degree, 120 degrees and 60 degrees, and machining a first tool to a third tool by using a first tool with a tool angle alpha mounted on a fly-cutter disc; the mold base material is rotated to be located at the 0-degree position, the 120-degree position and the 60-degree position, machining of the fourth tool, the fifth tool, the sixth tool and the sixth tool is conducted, in the machining of the fourth tool, the fifth tool, the sixth tool and the sixth tool, the first tool is used for machining, the second tool is used for machining, the first tool and the second tool are symmetrical tools, and the inclination angles of the two sides are the same. While better performance indexes under different application conditions are obtained, the influence of large conical surface angle deflection angle processing or asymmetric design on optimization and balance of the retroreflection performance of 0 / 90 / 180-degree orientation of the reflective film can be reduced.

The utility model relates to clamping blocks (5) of a hexagonal step chuck (19), clamping blocks (28) of a triangular step chuck and clamping blocks (23) of a round step chuck, which are used for clamping an off-axis of a lathe and comprise six, three or four fan-shaped clamping blocks (5) which are circumferentially arranged and spliced. The clamping device is characterized in that the inner side face of the clamping block (5) and the contact face of the outer side of the obliquely-arranged and fixed hexagonal or triangular or round workpiece (14) form a regular hexagonal cylinder (18) or a regular triangular cylinder (22) or a cylinder (24); six, three or four clamping blocks (5) are spliced to form a bottom surface which is in parallel and close contact with the bottom end surface of an inclined workpiece (14); the rotating shaft of the clamping block (5) and the symmetry axis of the contact face of the inclined workpiece (14) form an off-axis angle alpha, and alpha is larger than O degrees and smaller than or equal to 30 degrees. Due to the fact that the clamping block (5) adopts an off-axis design, the problem that a chamfered nut (11) and an offset bolt (12) cannot be machined through an existing clamping block is solved.

The invention relates to the technical field of cutting knives, and discloses a cutting knife, machining equipment and a machine tool, the cutting knife is characterized in that a blade body is in a cross section perpendicular to an axis, two front knife faces and two rear knife faces form a centrosymmetric quadrangle, adjacent front knife faces and rear knife faces form cutting blades, and the cutting blades are in the quadrangle and on the same side of the axis; an included angle alpha is formed between the rear tool face and the machining reference face of the rear tool face, the included angle alpha is larger than or equal to 0.5 degree and smaller than or equal to 20 degrees, and the blade body is provided with two machining reference faces which are symmetrically located on the two sides of the axis of the blade body and parallel to the axis. By means of the structure, the cutter does not need to machine a roll angle in the machining process, the one-way cutting edge is tightly attached to the machining cambered surface, and therefore residues on the machined surface are reduced, the machining quality is improved, and high-precision machining is achieved.

A closure element is adapted for use with a cup to form a container when combined, the container configured to hold a beverage or a granular substance. The closure element comprises a sealing portion and an annular sealing wall extending around the sealing portion, the annular sealing wall is tilted with an angle alpha of between 2-8 degrees in relation the axis A and intended to be in contact with an inside surface of an annular inner wall of the cup to seal the container. The closure element further comprises a spout configured to deliver the beverage or granular substance to a user. The closure element is configured to be pressed into the cup so that the annular sealing wall engages the inside surface of the annular inner wall of the cup to form a tight seal between the closure element and the cup.

The invention discloses a noise reduction and efficiency improvement pump jet propeller C-shaped circumferential bending stator and a design method, and the method comprises the steps: building a hull-rudder-pump jet propeller calculation model, changing the phase angles theta of the stator at different radiuses, and preliminarily determining the lateral slope distance distribution parameter ai of the C-shaped circumferential bending stator; after a pump-jet propeller provided with a straight stator and a C-shaped circumferential bending stator is arranged in an underwater vehicle, self-propulsion test simulation is carried out, and the thrust and torque of each component of the propellers when the two different propellers are at self-propulsion points are monitored; adjusting a slant distance distribution parameter ai of a bent stator side to obtain different distribution forms of circumferential phase angles of the stator; adjusting geometric attack angles alpha of sections at different radiuses of the stator blade, and selecting the most suitable distribution form of the geometric attack angles alpha as an optimization result; and determining the most suitable chordwise distribution form of the blade section as an optimization result. According to the invention, the bearing force, hydrodynamic noise and structural vibration noise of the submarine propeller are reduced only through the lateral inclination change of the stator blades.

The invention discloses a method for realizing elliptic cone scanning by a communication-in-moving antenna. The method comprises the following steps: determining the value of a scanning position point number parameter N; determining the value of the maximum scanning offset angle delta A in the azimuth angle direction and the value of the maximum scanning offset angle delta E in the pitch angle direction; determining values of an expected azimuth angle alpha 0 and an expected pitch angle beta 0 of the current antenna; setting a scanning counter i; when i is less than 4N, calculating a parameter theta i, calculating a scanning offset angle delta i, calculating a scanning track beta i of a pitch angle, and calculating a scanning track alpha i of an azimuth angle; the pitch angle of the antenna is controlled to rotate to a new position beta i, and the azimuth angle of the antenna is controlled to rotate to a new position alpha i; and updating the scanning counter i, i = mod (i + 1, 4N), and returning to execute. The method not only can realize elliptic cone scanning, but also can realize cone scanning, and can effectively solve the problem that the average receiving level is reduced when the communication-in-moving antenna of which the cross section of the beam main lobe is elliptic performs cone scanning.

The application provides a fall-preventing triangular profile structure and a mounting method. The triangular profile structure comprises a triangular cross-section structure formed by sequentially connecting a first side 1, a second side 2 and a third side 3; an angle alpha between the second side 2 and the third side 3 is 90-120 degrees; an angle beta between the first side 1 and the second side 2 is 30-60 degrees; the length of the third side 3 is less than the length of the first side 1; and an anti-skid structure is arranged on the bottom surface of the third side 3. The technical scheme can simplify the construction process, improve the operation flexibility, and save the construction cost.

The invention relates to a method and device for designing a spatial streamline inlet of a rotational flow separator, and the method comprises the steps: determining an inlet angle alpha, a wrap angle beta, an incident angle gamma and an overturning angle theta of the inlet of the rotational flow separator according to the performance requirements of the rotational flow separator; the method comprises the following steps: selecting a control point at a rotational flow separator, generating a basic shape of a characteristic bus of the spatial streamline inlet through a spline curve equation, then selecting a type value point to carry out iterative optimization on the bus shape, and determining a final curve shape of the spatial streamline inlet through an entrance angle, a wrap angle, an incident angle and a flip angle; based on the inlet shape of the rotating flow separator, the section shape of a space streamline inlet is designed through a Bezier curve equation; and according to the final curve shape and the section shape of the spatial streamline inlet, the spatial streamline inlet structure of the rotating flow separator is determined. Compared with the prior art, pre-separation of particles / liquid drops is achieved through fluid inertia accelerated rotation, and the separation efficiency of the hydrocyclone is improved.

The invention provides a dynamic art device, relates to the technical field of artware, and solves the technical problem of dynamic simplicity of ornaments in the prior art. The device comprises a first rotation driving assembly, a rotation shell, a second rotation driving assembly and a decoration part, the first rotation driving assembly is arranged in the rotation shell, the driving end of the first rotation driving assembly is connected with the rotation shell, and the rotation shell is of a spherical shell structure; the rotating part of the second rotating driving assembly is rotatably arranged on the rotating shell, the decorating part is arranged on the rotating part, the rotating axis of the rotating part deviates from the center of the decorating part, the included angle alpha between the rotating axis of the rotating part and the rotating axis of the rotating shell is larger than or equal to 30 degrees and smaller than or equal to 90 degrees. By means of the eccentric arrangement mode of the decoration part and the two rotary driving assemblies, the decoration part can eccentrically rotate on the rotating hemispherical shell, and therefore the dynamic state of the decoration part is more complex and elegant.

The invention provides a niobium plate leveling method which comprises the following steps: primary leveling: feeding a niobium plate to a leveling machine for the first time for leveling, and discharging at a first bending angle to obtain a primary leveled plate; secondary leveling is conducted, specifically, after the primary leveling plate is rotated by an angle alpha, the primary leveling plate is fed into the leveling machine for leveling in a secondary feeding mode, discharging is conducted at a second bending angle, and a secondary leveling plate is obtained; wherein the first bending angle is the included angle between the tangent line of the primary discharging end of the niobium plate and the horizontal direction, the second bending angle is the included angle between the tangent line of the secondary discharging end of the niobium plate and the horizontal direction, alpha is larger than or equal to 45 degrees and smaller than or equal to 90 degrees, and the first bending angle is larger than or equal to 50 degrees and larger than or equal to the second bending angle and larger than 0 degree. According to the leveling method, the technological process can be simplified while the flatness and the thickness uniformity of the niobium plate are improved, and the machining requirement of the high-precision pure niobium plate is met with low production cost.

The application provides an internal embedded bomb cabin honeycomb configuration aerodynamic layout for improving flow field stability, and the internal embedded bomb cabin cross section body is a hexagonal honeycomb configuration layout, wherein the top surface of the honeycomb configuration is opened, the other five surfaces are closed wall surfaces, the top surface is parallel to the bottom surface, the included angle alpha between the bottom surface and the adjacent surface is 135 degrees, the longitudinal depth ratio beta of the honeycomb configuration is L / H=1.5, L is the maximum transverse distance of the bomb cabin cross section, and H is the maximum longitudinal height of the bomb cabin cross section. Under the condition of meeting the requirements of structural strength, sound and heat insulation, weight reduction, internal structure design of the fuselage, capacity and other constraints, the internal flow flow field stability of the internal embedded bomb cabin can be greatly improved, the flow field characteristics are improved from the physical root, the evolution of fine vortex and secondary vortex is effectively inhibited, and the process of the flow field from the steady state to the unsteady state is greatly delayed. Because the optimization design effectively inhibits the unsteady flow, especially the premature appearance of the turbulent flow, the aerodynamic efficiency of the internal flow of the bomb cabin is improved.

The application discloses a grinding processing method for inner concave outer circle and end face, which comprises the following steps: grinding the inner concave outer circle and end face of a part to be processed by using a grinding wheel; the grinding wheel comprises a grinding wheel body and a connecting rod; one end of the connecting rod is connected to a grinding wheel frame, and the other end is connected to one end of the grinding wheel body; a grinding surface is arranged on the side surface of the grinding wheel body to grind the part to be processed; the central axis of the connecting rod and the central axis of the part to be processed have an inclination angle alpha; on the plane passing through the central axis of the part to be processed, the end face projection line is used as a reference line, the highest height of the inner concave outer circle projection line relative to the reference line is H, the diameter of the grinding wheel body is D, the diameter of the connecting rod is d, the length of the connecting rod is l, l<=3d is satisfied, and beta=90-alpha. The application has the advantages of high machining precision and high efficiency.

The invention discloses a snakelike arm structure based on a negative Poisson's ratio metamaterial. A snakelike mechanical arm is obtained by assembling a plurality of mechanical metamaterial structural bodies. The mechanical metamaterial structural body is composed of an external frame unit capable of elastically deforming and bionic scales; the elastically-deformable outer frame unit is formed by arranging four connecting rods between a vertical rod A and a vertical rod B which are arranged in parallel. The elastically deformable outer frame unit has an elastic deformation characteristic of the flexible mechanism. The mechanical metamaterial structural body is divided into a first plane and a second plane from the space structure, the second plane tilts upwards by a certain angle alpha relative to the first plane, the alpha forms a micro-convex bionic scale structure with a certain backward angle, the highly asymmetric pawl characteristic with one sharp side and the other gentle side is shown, and the mechanical metamaterial structural body is formed. Therefore, the mechanical metamaterial structural body forms friction anisotropy in the scale blade direction, namely, different friction forces are shown in different movement directions.

The invention relates to a wheel end assembly with a wheel load and air pressure sensing function, and the wheel end assembly comprises a tire, the tire comprises a tire crown, an anti-eccentric belt is embedded in the tire crown, and the anti-eccentric belt comprises a first belt layer, a second belt layer, a third belt layer and a fourth belt layer which are sequentially stacked from inside to outside; the angle alpha between the first belted layer and the circumferential direction of the tire is 15-30 degrees, the angle beta between the second belted layer and the circumferential direction of the tire is 20-40 degrees, and the angle directions of the second belted layer and the first belted layer are opposite; the third belted layer comprises a third belted left layer 14a and a third belted right layer which form an angle gamma of 30-60 degrees with the circumferential direction of the tire and are arranged at an interval, and a third belted middle layer which is positioned between the third belted left layer 14a and the third belted right layer and has an angle delta of 0-2 degrees; and the angle theta between the fourth belted layer and the circumferential direction of the tire is 15-30 degrees. The tire crown deformation can be inhibited, the grounding pressure is more uniform, the service life of the tire is prolonged, and the abrasion mileage is increased.

The invention provides a radar covering part design method and system, a vehicle and an evaluation method. The radar covering part design method comprises the steps that three-dimensional models of a radar and a covering part are established; measuring a first included angle alpha between the radar and the covering part on the horizontal section and a second included angle beta between the radar and the covering part on the vertical section; the larger value in the first included angle alpha and the second included angle beta is called as an included angle theta between the radar and the covering part; and calculating the optimal thickness d of the covering part according to the included angle theta between the radar and the covering part, the electromagnetic wave frequency f of the radar and the dielectric constant of the covering part. The influence of the installation angle of the covering part and the radar on the optimal thickness of the covering part can be fully considered, so that the detection performance of the radar is ensured.

The invention relates to a motor NVH (Noise Vibration and Harshness) performance optimization method, which comprises the following steps of: S1, defining a cogging angle of a rotor which comprises N sections of skewed poles, and calculating an initial angle alpha (0) of each section of skewed pole; s2, calculating an electromagnetic force amplitude initial value Fr0 (Amp) when the initial angle of each skewed pole is alpha (0); s3, adjusting the angle of each section of skewed pole according to a preset angle step number a (step), calculating the electromagnetic force amplitude Fr (Amp) of each section of skewed pole corresponding to the angle, and defining a target function Min (Fr (Amp)); s4, according to the target function Min (Fr (Amp)), obtaining the target electromagnetic force amplitude of each section of skewed pole, and synchronously calculating the electromagnetic force resultant force amplitude of the target electromagnetic force amplitude of each section of skewed pole; and S5, evaluating whether the influence of the electromagnetic force phase meets requirements or not, if not, returning to S3, adjusting the angle of each section of skewed pole and / or adjusting the target function, and if yes, obtaining the target electromagnetic force amplitude and the target angle of each section of skewed pole.

The invention discloses a method for adjusting the circumferential clearance of a thrust pad bearing of a marine gearbox, which comprises the following steps of: firstly, installing other parts of a thrust pad bearing device except a partition plate, and determining the position of the center line of an output shaft after installation by utilizing a reference transfer method; the position relation between the center line of the output shaft and the center line of the bearing hole of the bearing box is established through the radial clearance and the offset angle alpha of the supporting bearing; the distance from the reference surface to the arcs of the thrust pads is measured, the positions of the circle centers of the two corresponding thrust pads are solved according to the three-point circle drawing principle on the arcs, the symmetrical positions of the two thrust pads during final assembly are determined according to the perpendicular line of the connecting line of the circle centers, and then machining diagrams of the arcs on the two sides of the partition plate are determined. And after machining, the total clearance of the thrust pad bearing in the circumferential direction is determined according to a size detection report and the radius value of the thrust pad.

The invention discloses a special-shaped bending treatment method for iron tower wire hanging angle steel, which comprises the following steps of: firstly, determining parameters of thickness t and inner arc r of angle steel raw materials, then determining a bending point as a point E, and determining a line segment DE as the thickness t plus the inner arc r, so that the bending distance line segment DE is equal to t + r; a theoretical line segment OE and an actual bending line segment DE are determined firstly, and due to the fact that the bending angle alpha and the angle OED are in a symmetrical relation, the angle OED is equal to the angle alpha; the displacement delta is as follows: firstly, the line segment OD and the line segment DE are in a vertical relationship, a vertical line is drawn from a point D to OE to obtain a point F, the numerical value of a less-movement line segment OF in the OA direction is obtained according to a trigonometric function, and the position of a connection hole of the point A needs to move towards the outer OA direction by the displacement delta 1; according to the special-shaped bending processing method for the iron tower wire hanging angle steel, displacement generated in multiple directions is accurately calculated, displacement adjustment is conducted on a mounting hole, a component is made to restore the theoretical position, deviation generated between the theoretical structure and the actual structure is perfectly solved, and structural potential safety hazards are eliminated.

The invention provides an aqueduct construction method. The aqueduct construction method comprises the following steps that S1, an aqueduct is divided into a straight line section and a curve section; s2, calculating a central angle alpha of the second groove body; s3, dividing the straight line segment into a first straight line segment and a second straight line segment; a prefabricated groove field is built on the first straight line section; s4, supports are installed at the tops of the cushion blocks of the two adjacent pier columns, then a groove body left end mold, a groove body right end mold and a groove body mold plate of a first groove body are installed, prefabrication of the first groove body is conducted, and all prefabrication of the first groove body and assembly construction of a second straight line section are completed; s5, clockwise rotating the left end mold of the groove body by 0.5 alpha, anticlockwise rotating the right end mold by 0.5 alpha, adaptively moving and adjusting top supports of two adjacent pier columns in the longitudinal groove direction, mounting a groove body mold plate of a second groove body, and then completely prefabricating the second groove body and assembling and constructing a curved section; and S6, assembling construction of the first straight line section is completed. The construction efficiency of aqueduct construction is improved.

The utility model discloses a convenient screw tap which is integrally formed by a handle part and a processing part, a cutting edge unit of the processing part comprises a first inclined surface, a second inclined surface and a third inclined surface, the first inclined surface is connected with the second inclined surface, and an included angle alpha between the first inclined surface and the second inclined surface is 145-165 degrees. And the second inclined surface is connected with the third inclined surface, and an included angle beta between the second inclined surface and the third inclined surface is 120-135 degrees. The utility model further discloses a novel anti-loose cone structure formed by cutting or tapping of the screw tap. The screw tap can be conveniently and directly used for manufacturing a cone structure with a plurality of inclined planes, the working procedures are few, and the efficiency is high; when the internal thread cone tapped by the screw tap is meshed and matched with the cut external thread cone, large radial force can be generated by small axial clamping force, so that the matching between the cones has an anti-loosening effect.

The application discloses a processing method of an adjustable-angle golf club pipe handle, which completes mechanical processing procedures of the pipe handle on a machine tool, and utilizes a first spindle and a second spindle to move along an X axis transversely, and utilizes a first tool seat and a second tool seat to flexibly move along the X axis and a Z axis to adjust the position of a workpiece and a tool, so that all mechanical processing is completed, the occupation of the machine tool is reduced, compared with traditional multiple intermediate sequences and manual clamping, the production cycle is reduced, and the processing efficiency is improved. An inner thread hole of the pipe handle and a center axis of an installation inner hole have an angle alpha, the rotation axis of the rotary tool is offset from the center axis of the pipe handle by adjusting the installation posture of a driving unit on the first tool disc, quick and flexible adjustment can be conducted according to production requirements, the production requirements of different products can be quickly adapted, and good convenience and applicability are achieved.

The invention discloses a method for correcting propeller deflection and a device for adjusting propeller deflection. The method comprises the steps that a propeller is installed to a set position; selecting a three-coordinate direction of a rectangular coordinate system of the measurement reference of the measurement device; measuring a first angle gamma at which the paddle deflects around an axis parallel to the first direction; measuring a second angle alpha at which the paddle deflects about an axis parallel to the second direction; measuring a third angle beta at which the paddle deflects about an axis parallel to the third direction; and adjusting the position of the paddle so that the first angle gamma reaches a first set value, the second angle alpha reaches a second set value, and the third angle beta reaches a third set value. According to the method for correcting the deflection of the paddle, the measuring device is in communication connection with the upper computer, the actual coordinates of the paddle in the selected three-coordinate direction are measured through the measuring device, the upper computer calculates and obtains the deflection angle of the paddle around the axis parallel to the three-coordinate direction, the deflection operation of the paddle can be completed by adjusting the angle to the set value, and the efficiency is high.

The utility model relates to the technical field of multi-rotor aircrafts, and particularly discloses a multi-rotor aircraft propeller suitable for plateau areas, the spanwise direction is the direction from the blade root to the blade tip, the chordwise direction is the direction perpendicular to the spanwise direction, the distance between the front edge and the rear edge of the position where an airfoil is located is the chord length C of the airfoil, and the chord length C of the airfoil is larger than the chord length C of the airfoil. The included angle between the chord line of the airfoil and the blade rotor plane is a torsion angle alpha, the vertical connecting line between the rotation center of the propeller and the blade tip is L, the distance between the front edge point of the airfoil and the L is Yq, the distance between the rotation center of the propeller and the blade tip is R, and C, Yq and alpha are all maximum values at the position 35% R away from the blade root. C, alpha and Yq are gradually increased from the blade root to the maximum chord length position, and C, alpha and Yq are gradually reduced from the maximum chord length position to the blade tip. By adopting the structural design, the flight requirements of plateau areas can be met.

The invention relates to the technical field of tires, in particular to a method for judging the theoretical calculation flat-width matching degree of a tire. According to the method, the included angle alpha between the relative straight line of the tire cord and the horizontal datum line and the vertical distance beta between the farthest tire cord and the horizontal datum line are clearly measured, and the specific judgment threshold value is set, so that a traditional subjective judgment mode depending on the number of bent cords and the rubber seepage amount in a finished product X-ray image is replaced; the judgment result of the flatness and width suitability is more accurate and traceable, and misjudgment caused by human experience difference is avoided.

The invention discloses a vacuum coating device and a coating uniformity correction method. The vacuum coating device comprises a vacuum chamber, a first target material group, a second target material group and a base, the first target material group and the second target material group are arranged in the vacuum chamber; the base is rotatably arranged in the vacuum chamber around a first axis, and the first target group and the second target group are respectively arranged on two sides of the first axis; the workpiece is rotatably arranged on the base around a second axis, and the first axis and the second axis are arranged at an included angle; the workpiece comprises a first surface group and a second surface group which are adjacent to each other and form an included angle, and establishing a rectangular coordinate system in a first plane perpendicular to the first axis by taking an intersection point of the first axis and the first plane as an original point and taking a midline of the first target group and the second target group as an X axis, the included angle between the projection line of the first surface group on the first plane and the X axis is alpha, and the angle alpha is 40-50 degrees. By adopting the scheme, the problem that the coating uniformity on the surface of a workpiece is difficult to correct is solved.

The invention relates to the technical field of spaceflight, in particular to a satellite momentum wheel support design method, device, equipment, medium and program product, a satellite upper plane L0 is drawn, and a rectangular coordinate system coinciding with a satellite body coordinate system is drawn, so that the X axis and the Y axis of the rectangular coordinate system are located in the plane L0; acquiring an intersecting line S1 of the conical surface Y1, the conical surface Y2 and the conical surface Y3 in the rectangular coordinate system according to a pre-acquired mounting angle alpha, a pre-acquired mounting angle beta and a pre-acquired mounting angle gamma of the momentum wheel; drawing a plane L1 taking the intersecting line S1 as a normal, and obtaining a mounting section C1 corresponding to the plane L1; and projecting the mounting section C1 to the plane L0 to obtain a section C2, and stretching between the mounting section C1 and the section C2 to form an entity Z1. The invention aims to provide a satellite momentum wheel support design method, device and equipment, a medium and a program product in order to solve at least one technical problem related in the prior art.

The invention provides a parameter optimization method for a rotary cultivator with a low-speed small-bending-angle rotary blade, belongs to the field of agricultural mechanical equipment, and analyzes, researches and optimizes the bending angle of the existing rotary blade, the edge angle of the rotary blade and the rotating speed of a rotating body. The bending angle alpha of the rotary blade, the cutting edge angle beta of the rotary blade and the rotating speed n of the rotating body are used as test factors, the soil crushing rate M and the torque T are used as evaluation indexes, three-factor and three-horizontal orthogonal tests are carried out on the machine tool, and after range and variance analysis is carried out on the test results, the obtained better structure parameter combination is as follows: the bending angle alpha of the rotary blade is equal to 132 degrees, and the bending angle beta of the rotary blade is equal to 132 degrees; the edge angle beta of the rotary blade is 20 degrees, and the rotating speed n of the rotary body is 150 r / min; according to actual production requirements, the better structure parameter combination is adjusted as follows: the bending angle alpha of the rotary blade is equal to 132 + / -5 degrees, the cutting edge angle beta of the rotary blade is equal to 20 + / -2 degrees, and the rotating speed n of the rotary body is equal to 150 + / -10 r / min; the rotary cultivator used by the optimization method comprises a rack, a rotary body and a transmission assembly. The parameter optimization method is novel, the structural parameter combination is reasonable, the soil crushing rate is high, and the machine load is small.