489 results about "Wedge angle" patented technology

It is an object of the present invention to provide an interlayer film for a laminated glass excellent in a sound-insulating property, which is preferably usable for a head up display and the like wherein a driver can look at the front view and an instrument display simultaneously without requiring to look down, and to provide a laminated glass.

The present invention is directed to interlayer film for a laminated glass, which comprises at least a pair of protection layers and a sound-insulating layer sandwiched between the pair of the protection layers, and which has a wedge shape as a cross-sectional shape, a wedge angle θ of 0.1 to 0.7 mrad, the maximum thickness of 2000 μm or thinner, and the minimum thickness of 400 μm or thicker, the minimum thickness of the sound-insulating layer being 20 μm or thicker.

The invention relates to a laser rotary-cut drilling device. The output end of a laser is provided with a beam expander; the output end of the beam expander is provided with a 45-degree total reflection mirror; the output end of the 45-degree total reflection mirror is provided with an optical rotation system; the optical rotation system comprises a first wedge prisma, a second wedge prisma, a third wedge prisma and a fourth wedge prisma; the first wedge prisma and the second wedge prisma have the same wedge angles; the first wedge prisma or the second wedge prisma is connected with a vertical straight-line motion mechanism; the third wedge prisma and the fourth wedge prisma have the same wedge angles; the third wedge prisma or the fourth wedge prisma is connected with a rotation mechanism; the output end of the optical rotation system is provided with a focus lens; and the focus lens is just opposite to a processing platform. The device is used for performing laser rotary-cut drilling on a workpiece, and can process straight holes, variable taper holes and irregular taper holes, so a laser drilling effect of variable sizes, controllable taper and smooth edges is achieved.

A magnetic liquid damping vibration attenuating device belongs to the mechanical engineering vibration field, is suitable for vibration attenuating of long objects, and solves the problem that service life of a permanent magnet is shortened and vibration attenuating performance is affected due to the collision of the inner wall of an existing magnetic liquid damping vibration attenuator shell and the permanent magnet. The magnetic liquid damping vibration attenuating device is characterized in that a first annular permanent magnet is adhered to the inner wall of a shell by gum to form the inner wall of an vibration attenuator; the diameter of the first annular permanent magnet equals to the diameter of the inner wall of the shell; the depth of the shell equals to the height of the first annular permanent magnet; wedge angle gaskets are installed on the bottom of the shell, V-shaped included angles are placed upwards, and a second annular permanent magnet adhered to magnetic liquid is arranged in the shell; both the first annular permanent magnet and the second annular permanent magnet are magnetized along the radial direction, and the magnetizing directions of the first annular permanent magnet and the second annular permanent magnet are opposite; and an O-shaped rubber sealing ring is embedded in a groove which is placed on an opening end surface of the shell, and an end cover and the shell are tightly connected together through a bolt and a nut. The magnetic liquid damping vibration attenuating device is simple, reliable, obvious in vibration attenuating effect, and long in service life.

A transseptal needle includes an elongate needle body having a distal end and a proximal end and a cannular needle tip located proximate the distal end of the needle body. The needle tip has a distal segment, a proximal segment, and a longitudinal axis. An inner surface of the needle tip defines a passageway spanning at least a portion of the needle tip, and an outer surface of the needle tip defines a wall with the inner surface. The distal segment of the needle tip also includes a wedge surface and a dome-shaped region. The wedge surface forms a wedge angle of other than 90 degrees relative to the longitudinal axis. The dome-shaped region, which intersects the wedge surface, includes at least two bevels that intersect the wedge surface and that intersect each other at one or more points on the needle tip.

A combined interference device for measurement of aspheric surface includes a laser, a spatial filter, two beam expanding systems, a beam shrinking system, a spectroscope, a convertible lens, three polarizers, two optical plates, four circular optical wedges with small wedge angle, a beam-dividing grating, a 1/4 wave plate, a polarizer group and a CCD. In the device, real-time measurement is realized through simultaneous phase-shifting method, and frequency conversion function is realized through rotating two pairs of double optical wedges. The experimental device adopts common optical elements, so the cost is low, and the device can measure aspheric surfaces of different diameters and is suitable for the plane and the sphere. The real-time high precision measurement in conventional environment can be realized, and the invention has frequency conversion function, which is very effective for treating the mirror surface with discontinuous regions.

An indexable milling insert having triangular shape, the cutting insert comprising a mounting hole placed centrally in the cutting insert, a first support surface and a second support surface, which support surfaces are parallel with each other and act as alternating support surfaces, that the cutting insert comprises three equally long sides, which extend between the parallel support surfaces, that the cutting insert is provided with main cutting edges, which are orientated perpendicularly to the center axis of the mounting hole as well as provided in such a way that a rotation of the cutting insert around the center of the mounting hole to an alternative insert scat alternatively a turning of the cutting insert to an alternative insert seat provides an identical location of the main cutting edges in relation to a piece to be machined, and that the wedge angles (β) of the cutting insert are in the range of 70°≦β≦85°. The invention also relates to a milling tool equipped with the milling inserts defined above. The cutting insert comprises planar support surfaces situated on the sides, and the support surfaces in the respective sides form mutual angles of 60°.

A tapered interlayer comprising at least one resin layer and a having tapered zone with a wedge angle of at least 0.13 mrad. The first resin layer comprises a first poly(vinyl acetal) resin and at least one RI balancing agent. The refractive index of the first resin layer is at least 1.480.

A thermoplastic film for a laminated-glass pane having a non-linear continuous wedge insert in the vertical direction in some sections. The thermoplastic film has a continuous non-linear wedge angle profile having a first section, which has a wedge angle that is constant or that is variable at least in some sections in order to avoid double images in transmission. The nonlinear wedge angle profile also has a second section, which adjoins the first section. The second section has a variable wedge angle in order to avoid ghost images in reflection. The wedge angle profile has a third section, which adjoins the second section. The third section has a wedge angle that is constant or that is variable at least in some sections in order to avoid double images in transmission.

A wafer having an off angle α is produced from a hexagonal single crystal ingot having an upper surface, a c-plane exposed to the upper surface, and a c-axis perpendicular to the c-plane. The ingot is supported by a wedge member having a wedge angle α equal to the off angle α, thereby inclining the upper surface of the ingot by the off angle α with respect to a horizontal plane. A modified layer is formed by setting the focal point of a laser beam inside the ingot and next applying it to the upper surface, thereby linearly forming a modified layer inside the ingot and cracks extending from the modified layer along the c-plane. The focal point is moved in the second direction to index the focal point by a predetermined amount.

The invention discloses a method for designing a fixed-geometry two-dimensional mixed-compression type supersonic velocity air inlet channel. A basic structure of the adopted two-dimensional mixed-compression type air inlet channel comprises an outer pressing section, an inner pressing section, a throat section, an expanding section and a lip. The lip is of a sharp plate structure with a certain wedge angle. When the air inlet channel is designed, designed starting Mach number is improved appropriately, the lip shape is changed, and the starting mach number is effectively reduced to be lower than a requested value through a certain flow on the premise that the flow requirement of the air inlet channel is met. By means of the method, the requirement for starting performance can be met, contraction ratio of the air inlet channel can be increased in design, and accordingly high back pressure resisting capability and low outlet Mach number are obtained in a wide working range to facilitate efficiently combusted organizations in a combustion chamber. Furthermore, small total pressure loss in the working process of the air inlet channel can be achieved through the change of the lip shape. The method for designing the fixed-geometry two-dimensional mixed-compression type supersonic velocity air inlet channel has good actual application value.

A method of manufacturing a milling cutter having a cutting head and a coaxial integral shank comprising the steps of grinding, in a first grinding operation, a plurality of helical flutes (5) into the outer periphery of a cutter blank from a lead end (24) using a peripheral area (16) of a first grinding wheel (15) generally of frusto-conical profile and rotatable about an axis (18) generally transversely of the milling cutter axis (1), which peripheral area (16) produces, simultaneously, the following three features: a leading face (9) of a trailing tooth; a rear face (10) on an adjacent preceding tooth; and a swarf removal gullet (13) having divergent sides, grinding, in a second grinding operation, and using a peripheral edge (19) of a second grinding wheel (20), a relief face (11), which extends rearwardly from a leading end of a tooth tip, resulting in a minimum tooth wedge angle of approximately 60 DEG, and grinding, in a third grinding operation, a radius (23) on the end of each flute. The invention also includes a milling cutter (1).

Glass having an inner surface and an outer surface, includes a first area used by a head-up display, and a second area adjacent to the first area, and not used by the head-up display. Representing an area closest to a boundary between the first area and the second area in the first area, by an edge on the boundary side in the first area, and representing an area closest to the boundary in the second area, by an edge on the boundary side in the second area, a requirement is that a wedge angle δ formed by the inner surface and the outer surface satisfies a predetermined formula.

The invention discloses a two-dimensional variable geometry hypersonic intake port provided with a rectangular inlet as well as a design method and a working method of the two-dimensional variable geometry hypersonic intake port. A rotatable adjustable top board is designed and mounted on the basis of a traditional hypersonic intake port structure provided with a rectangular section, and the angle position of the adjustable top board is adjusted according to the flight condition of an aircraft; a front suction window and a rear suction window are formed through small-angle rotation of the adjustable top board, the front-edge suction window is designed on the final-stage top board front edge, and the rear-edge suction window is designed in the position where the adjustable top board and a throat are connected. A boundary layer developed by a precursor is taken out through simple rotation under the condition of low mach number in the acceleration process, a final-stage wedge angle is reduced during rotating, flow capture is improved while shock wave is weakened, further, the mach number of an inlet at an inner contraction section is relatively increased, and accordingly, the starting performance of the intake port is improved; the starting performance of the inner contraction section of the intake port is improved through throat suction; the variable geometry process adopting small-angle rotation is easier to realize, the starting performance under the condition of the low mach number is improved, the flowing control is more comprehensive, and the aerodynamic performance of the intake port is comprehensively improved.

The invention relates to a sub-soiling shovel, i.e. a typical soil working part of agricultural machinery, in particular to an exponential function curve type biomimetic resistance-reducing sub-soiling shovel handle with a biomimetic structure, aiming at solving the technical problems of excessive working resistance of the traditional sub-soiling shovel. The sub-soiling shovel handle is based on outlines of the upper surfaces of claw toes of a mus musculus and in the shape of an exponential function curve mode. The technical scheme of the invention is that the front-surface cutting edge of the biomimetic resistance-reducing sub-soiling shovel handle, which cuts soil, is in the shape of a longitudinal outline (in the exponential function curve mode) of the upper surface of a middle toe of a front claw of the mus musculus; and an exponential function equation is as follows: y=-66.61e<0.0117x> +17.78e<-0.1835x>, wherein x is more than or equal to -2 and less than and equal to 40, and x is more than or equal to -0.04 and less than and equal to 0.8 mm in terms of mm. A wedge angle alpha of the biomimetic resistance-reducing sub-soiling shovel is more than or equal to 15 degrees and less than or equal to 25 degrees. According to the biomimetic resistance-reducing sub-soiling shovel handle with exponential function characteristics, the working resistance of the sub-soiling shovel canbe reduced by 15 percent.

A method for determining three-dimensional coordinates of an object point on a surface of an object, including steps of providing a transparent plate having a first region and a second region, the second region having a different wedge angle than the first region; splitting a first beam of light into a first light and a second light; sending the first light through the first region or the second region; combining the first light and the second light to produce a fringe pattern on the surface of the object, the pitch of the fringe pattern depending on the wedge angle through which the first light travels; imaging the object point onto an array point on a photosensitive array to obtain an electrical data value; determining the three-dimensional coordinates of the first object point based at least in part on the electrical data value.

This invention identifies important geometric parameters of an adhesive microfiber with mushroom-shaped tip for improving and optimizing adhesive ability. The magnitude of pull-off stress is dependent on a wedge angle γ and the ratio of the tip radius to the stalk radius β of the mushroom-shaped fiber. Pull-off stress is also found to depend on a dimensionless parameter x, the ratio of the fiber radius to a length-scale related to the dominance of adhesive stress. Finally, the shape of edge tip, where the surface and sides of the mushroom-shaped tip join, is a factor that impacts strength of adhesion. Optimizing ranges for these parameters are identified.

The invention provides a laser far field focal spot measurement method based on orthogonal light wedge dichroism and a focal spot reconstruction algorithm. A measurement apparatus used in the method comprises a pair of orthogonal light wedges, a focusing lens, a CCD imaging device and a computer system. Beam splitting is performed to an incident laser beam through two light wedge device whose wedge angle directs to a mutually orthogonal direction and the incident laser beam is converged through the focusing lens. After that, the incident laser beam forms sub-spot array with successively damped peak strength on a CCD photosensitive surface in a lens plane. An effective method is used to carry out splicing fusion on each of the measured sub-spot. And finally, complete laser far field focal spot intensity distribution can be obtained through reconstruction. According to the invention, CCD dynamic measurement range can be greatly developed; a lot of high-frequency side-lobe information of the actual focal spot can be extracted from CCD background noise so that accurate measurement and light beam quality evaluation can be possibly achieved.

The invention relates to a welding method of laser brazing of X 80 pipeline steel and belongs to the advanced manufacturing technology field. High energy laser source is utilized as unified preheating light source and welding light source to perform steps which comprises laser-bounce, transverse beam splitting, energy distribution and inward refocusing are performed on laser through a reflecting mirror, a spectroscope and a focusing mirror, the purpose of laser transverse beam energy distribution is achieved by adjusting the position of the spectroscope, distance between a front laser beam and a rear laser beam is adjusted by adjusting the size of a wedge angle of the spectroscope to form into the front laser beam and the rear laser beam, the front laser beam is served as a preheating light beam, the rear laser beam is served as a welding beam, and energy dispersion of the preheat light beam is performed through a concave lens when the preheating beam is utilized to preheat. The welding method of the laser brazing of the X 80 pipeline steel solves the problem that nonuniform weld microstructure caused by common welding is easy to cause electrochemical corrosion.

The invention relates to a thigh stump endoprosthesis for an exoprosthetic treatment of a patient whose leg has been amputated in the thigh area, whereby the thigh stump can be pulled into a shaft to which the replica of a lower leg part and foot part of the prosthesis is attached. The inventive prosthesis includes a proximal shaft part which can be inserted inside a femur stump, whereby the shaft part is at least partially covered by an open-mesh three-dimensional spatial network structure, and includes a conical adapter on the distal end thereof. A condyle replacement which re-creates the shape of natural condyles of a knee joint can be coupled to the shaft part by means of said adapter. A cuneiform support can be joined to the condyle replacement with a wedge angle alpha which restores the valgity of the leg.

A part-holding fixture is adapted for rotation about a work spindle axis and includes a mounting land that seals a back surface of an optical flat for securing the optical flat to the part-holding fixture and that inclines the back surface of the optical flat through a wedge angle for grinding wedged optical flats at repeatable wedge angles.

The chiral liquid crystal depolarizer includes two parts of optical transparent material, with wedged or trapezoidal slot array, coated orientation film and chiral liquid crystal self-assembled into crystal characteristic structure. The two parts of optical transparent material are formed into liquid crystal box with wedged or trapezoidal cavity filled with mixture of optically active chiral molecule and birefringent liquid crystal. The chiral liquid crystal depolarizer in single wedge structure includes also spacer for controlling the wedge angle. The chiral liquid crystal depolarizer has the characteristics of both wedged crystal depolarizer and optically active crystal depolarizer, can realize monochromic light depolarization in wide spectral range, and has excellent depolarization to incident polarized light in different angle. The present invention has simple making process and greatly lowered cost, and is especially suitable for depolarization of great caliber light beam.