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872 results about "Circular surface" patented technology

In mathematics and, in particular, differential geometry a circular surface is the image of a map ƒ : I × S¹ → R³, where I ⊂ R is an open interval and S¹ is the unit circle, defined by f(t,θ):=γ(t)+r(t)𝐮(t)cosθ+r(t)𝐯(t)sinθ, where γ, u, v : I → R³ and r : I → R>0, when R>0 := { x ∈ R : x > 0 }. Moreover, it is usually assumed that u · u = v · v = 1 and u · v = 0, where dot denotes the canonical scalar product on R³, i.e. u and v are unit length and mutually perpendicular.

Electric pressure cooker with stirring function

InactiveCN105496184AFlexible rotationImprove stirring performanceCooking vesselsGear wheelCircular surface
An electric pressure cooker with a stirring function comprises a base, a heating plate, a rotary support, a liner and a motor and is characterized in that a rotary support side cylinder is arranged around the rotary support, an external gear ring is fixedly installed on the outer circular surface of the rotary support side cylinder and is meshed with a reduction gear, and the reduction gear is meshed with an output wheel of the motor; the liner is clamped in the rotary support, a long rod is fixedly installed in the middle of the lower side face of a pot cover on an upper opening of the liner, a cross-shaped frame is fixedly installed at the lowermost end of the long rod, each of four fulcrum bars of the cross-shaped frame is sleeved with a sleeve, a heavy square is supported by the sleeves, the long rod is sleeved with a center hole of the heavy square so that the heavy square can rotate around the rod, and a round sink table is arranged on the lower side face of the heavy square; the diameter of a cylinder is D, and D<=2(L+S); an included angle alpha is formed between a lower stirring blade on each of the four sides of the heavy square and the bottom plane of the liner, and alpha is between 15 degrees and 60 degrees; four upper stirring blades are fixedly and symmetrically installed on the portion, above the heavy square, of the long rod, an included angle beta is formed between each upper stirring blade and the bottom plane of the liner, and beta is between -60 degrees and -15 degrees.
Owner:魏伯卿

Surgical wide-angle illuminator

A variable-intensity, wide-angle illuminator is disclosed, one embodiment comprising: a light source for providing a light beam; an optical cable, optically coupled to the light source for receiving and transmitting the light beam; a handpiece, operably coupled to the optical cable to receive the light beam; an optical fiber, operably coupled to the handpiece, wherein the optical fiber is optically coupled to the optical cable to receive and transmit the light beam; an optical element, optically coupled to a distal end of the optical fiber, for receiving the light beam and scattering the light beam to illuminate a surgical field, wherein the optical element comprises a hemispherically shaped sapphire; and a cannula, operably coupled to the handpiece, for housing and directing the optical fiber and the optical element. The optical element can be a small-gauge, diffusive sapphire element having a polished circular surface co-incident with the distal end of the cannula and a light refracting hemispherical surface facing the optical fiber. For example, the optical element can be a 19, 20 or 25 gauge optical element. Further, the cannula and the handpiece can be fabricated from biocompatible materials. The optical cable can comprise a first optical connector operably coupled to the light source and a second optical connector operably coupled to the handpiece (to optically couple the optical cable to the optical fiber housed within the handpiece and cannula).
Owner:ALCON INC

Method for rolling and shaping stainless steel conical ring

The invention discloses a rolling and shaping method for a stainless steel conical ring forging in order to obtain the alloy conical ring forgings with excellent tissues and properties as well as realize accurate rolling. The method includes the following steps: alloy bar material is heated, carried out continuous upsetting and deformed by 75 to 80 percent so as to be made into a solid cake and then is punched again to lead the alloy bar material to be made into a hollow round cake after the aperture dimension of the alloy bar material is 15 to 20 percent of the dimension of the outer diameter thereof; a rectangle ring blank is obtained after the hollow round cake is heated, rolled circularly and deformed by 30 to 35 percent and the ring blank is processed into a pre-rolling blank with pitch; the pre-rolling blank is heated and arranged in a rolling die of a ring rolling machine and forms a conical ring forging after being rolled and deformed by 60 to 70 percent in a section groove of the die. When in expansion, the broadening speed of the pre-rolling blank along the radial direction is 2mm/s to 15mm/s with a radial rolling force of 40000kg to 220000kg. The method is mainly used for the shaping of the conical ring forging of a ground gas turbine. The method can be adopted to obtain the concial ring forging that is arranged in a flow line along the outline of a part and the circular surface of the forging is a complex curve.
Owner:GUIZHOU AVIATION TECHN DEV

Light-weight engine cylinder sleeve of passenger vehicle and production method of light-weight engine cylinder sleeve

ActiveCN104595050AImprove wear resistanceImprove the anti-friction performance and prolong the service life of the cylinder linerCylinder headsFoundry mouldsCombustion chamberBlack spot
The invention belongs to a light-weight engine cylinder sleeve of a passenger vehicle and a production method of the light-weight engine cylinder sleeve. Black spots are distributed on the outer circular surface of the cylinder sleeve, wherein the shapes of the black spots comprise a dumbbell shape, a positive frustum shape, a worm shape and an olecranon shape; the black spots in the four shapes are randomly distributed on the outer circular surface of the cylinder sleeve; the black spots are 0.25-1.1mm in height. The black points of the cylinder sleeve are only 0.25-1.1mm; the blank cooling speed in the centrifugal casting process of the cylinder sleeve is obviously reduced, thereby obviously improving a metallographic structure, improving the friction resistance of the cylinder sleeve and prolonging the service life of the cylinder sleeve; meanwhile, the black spots are small in height fluctuation, so that the roundness fluctuation in the process of casting an aluminum cylinder body is remarkable reduced; the possibility that engine oil sneaks into a combustion chamber is reduced; the tail gas emission of the combustion chamber is reduced; by the low-height black spots and the excellent metallographic structure, the wall thickness of the cylinder sleeve is reduced by 1mm; the cylinder center distance of the engine cylinder sleeve is reduced by over 2mm.
Owner:ZYNP GRP +1

On-line measurement method for axis orbit of main shaft under cutting condition of numerical control lathe

The invention relates to an on-line measurement method for an axis orbit of a main shaft under cutting condition of a numerical control lathe. The on-line measurement method comprises the following steps of arranging three displacement sensors on a to-be-measured circular surface along the circumferential direction of the main shaft, collecting displacement signals and main shaft rotary angle signals before cutting, converting into rotary angle interval sampling signals, adopting a three-point method to separate the contour error of the to-be-measured circular surface, extracting the displacement signals of the two vertical displacement sensors, and calculating the installation eccentric error; according to the contour error and the installation eccentric error, obtaining an interference signal guided by the to-be-measured circular surface; under the cutting condition, adopting an interpolation method to calculate the interference signal corresponding to the main shaft rotary angle signal, removing the interference signal from the displacement signal under the cutting condition, and obtaining the axis orbit of the main shaft. The method has the advantages that the influence on the separation calculation by the speed fluctuation of the main shaft is avoided, the requirements of separation accuracy and rotary error quick separation are met, and the on-line quick separation of the rotary error is realized.
Owner:XI AN JIAOTONG UNIV

Equipment for grinding surface of long shaft workpiece

InactiveCN101462244AGuaranteed grinding accuracySolve the problem that the processing quality cannot meet the design requirementsGrinding carriagesRevolution surface grinding machinesCircular surfaceLong axis
The invention discloses a device for grinding the surface of a long-shaft type workpiece, which comprises a guide rail arranged on a lathe bed, wherein the guide rail is provided with a grinding head sleeved on the workpiece annularly; the grinding head is equivalently provided with at least two grinding strips annularly; the grinding head is also provided with a structure to drive all the grinding strips to perform radial motions so as to enclasp or break away from the workpiece; and the grinding head is driven to perform axial reciprocating movement on the guide rail by a driving device, and achieves the processing of grinding the outer circular surface of the workpiece through the rotary motion of the workpiece and the axial reciprocating movement of the grinding head. The grinding head of the device is sleeved on the workpiece annularly and performs axial reciprocating movement along the guide rail simultaneously so as to ensure the straightness of the motion and the grinding precision of the workpiece surface in the grinding process, and solve the difficult problem that the processing quality cannot reach the design requirement in the process of the one-step grinding of the long-shaft kind workpiece, thus the workpiece roundness, the cylindricity and the surface roughness can achieve the designed specified value, and the product quality and the working efficiency are improved.
Owner:CHANGZHOU TENT HYDRAULIC MACHINERY

Detachable vibration reduction gear

The invention discloses a detachable vibration reduction gear, which comprises a basic wheel, wherein the diameter of the basic wheel is not greater than the diameter of a tooth root circle of the gear with a specified basic modulus; axial through slots with the number being the same as the number of gear teeth are formed in the basic wheel; detachable wheel teeth are respectively embedded in the through slots, and comprise tenon bodies inserted in the through slots and tooth heads integrally connected with the tenon bodies; end parts, close to the tenon bodies, of the tooth heads extend to two sides to form tooth head bumps; the lower surfaces of the tooth head bumps are arc faces adapting to the external circular surface of the basic wheel; the upper surfaces of the tooth head bumps are in smooth connection with the tooth profile curved surfaces of the detachable wheel teeth to form part of slot bottom faces of gear tooth slots; wheel tooth fixing slots are formed in gear wheel surfaces; circular ring shaped fixing bars are embedded in the fixing slots; vibration reduction slots are also formed in the tenon bodies of the detachable wheel teeth. The detachable vibration reduction gear provided by the invention not only is simple in structure and convenient for replacing the wheel teeth so as to reduce economic loss, but also can realize the universalization of a gear main body structure and has higher practical value.
Owner:YANCHENG INST OF TECH

Method for rolling and forming nickel-based high-temperature alloy conical ring

The invention discloses a rolling and shaping method for a nickel-based high temperature conical ring forging in order to obtain the alloy conical ring forgings with excellent tissues and properties as well as realize accurate rolling. The method includes the following steps: alloy bar material is heated, carried out continuous upsetting and deformed by 40 to 45 percent, so as to be made into a solid cake and then is punched again to lead the alloy bar material to be made into a hollow round cake after the aperture dimension of the alloy bar material is 30 to 35 percent of the dimension of the outer diameter thereof; a rectangle ring blank is obtained after the hollow round cake is heated and deformed by 35 to 40 percent; the ring blank is heated and arranged into an expansion mould to be made into a conical pre-rolling blank after being deformed by 10 to15 percent; the conical pre-rolling blank is heated and arranged in a rolling die of a ring rolling machine and becomes a conical ring forging after being rolled and deformed by 25 to 30 percent in a section groove of the die. When in expansion, the broadening speed of the pre-rolling blank along the radial direction is 2mm/s to 15mm/s with a radial rolling force of 40000kg to 220000kg. The method is mainly used for the shaping of the conical ring forging of an aeroengine. The method can be adopted to obtain the concial ring forging that is arranged in a flow line along the outline of a part and the circular surface of the forging is a complex curve.
Owner:GUIZHOU AVIATION TECHN DEV +1

Rotor magnetic levitation structure for double-stator disc motor flywheel energy storage device

The invention discloses a rotor magnetic levitation structure for a double-stator disc motor flywheel energy storage device. A permanent magnet sleeve opposite to a rotor disc is sleeved on a rotor shaft. A permanent magnet embedding ring is arranged in an axle center hole of the rotor disc. An interval is formed between the permanent magnet sleeve and the permanent magnet embedding ring. Magnetic poles of the opposite surfaces of the permanent magnet sleeve and the permanent magnet embedding ring have the same polarity. An annular lug boss is arranged at the central position of the outer circular surface of the rotor disk. A cavity body of a sealing shell is provided with annular bumps which are opposite to the upper and lower surfaces of the annular lug boss respectively. Axially levitated permanent magnet rings are arranged on the upper and lower surfaces of the annular lug boss of the rotor disc and the opposite annular bumps at an equal interval, and magnetic poles of the opposite surfaces of the axially levitated permanent magnet rings have the same polarities. By the rotor magnetic levitation structure, the radial swing or axial endplay of the rotor disc rotating at high speed can be avoided, and the so-called limiting is finished in a non-contact state, so that the problem that the rotor shaft is correspondingly deflected by the swing of the rotor disc and centrifugal force can be completely solved, and an ordinary high-speed bearing also can meet the requirements of the flywheel energy storage device.
Owner:TIANJIN RONGHENG GROUP

Method for processing metallic rope pulley

The present invention relates to a processing method of a metallic sheave. A steel plate is sheared and then stamped into a sheave plate, and at the same time, a central bearing hole is coaxially punched and is stretched to one side of the sheave plate, so that one side of a bearing sleeve is formed; the other side of the bearing sleeve is welded with the other side of the punched and stretched bearing hole of the sheave plate, so that a coaxial bearing sleeve is formed; the outer circular surface of the sheave plate and the surface of the inner hole of the bearing sleeve are turned to design sizes; the turned sheave plate is placed in a clamping rotating disk, and then a circumferential groove is cut on the central line of the outer circumferential surface of the sheave plate by a grooving cutter; on the grooved circumferential surface, the circumferential groove is squeezed by a squeezing cutter to a flare angle between 35 degrees and 90 degrees; a bearing is assembled into the bearing sleeve, and then the bearing sleeve is tightened. The cold squeezing processing of the metallic sheave not only can save energy but also can preserve the original tensile strength and stress yield and the good rigidity and toughness of the iron plate or steel and increases the service life of the cutter as well, the processing size precision of products is stable, moreover, while the quality of the metallic sheave is improved, loss is reduced, the production efficiency is increased, and the secondary environmental pollution cannot be caused.
Owner:NINGBO OULING ELEVATOR COMPONENTS

Welding manipulator for plastic water nozzle joint

The invention discloses a welding manipulator for a plastic water nozzle joint. The welding manipulator comprises a support, a cylinder assembly, a guide rail, a slide block and a heating device. The slide block and the guide rail are in horizontal sliding fit; the cylinder assembly comprises a first cylinder, a second cylinder and a third cylinder, wherein the cylinder body of the first cylinder is horizontally fixed on the support, a piston rod of the first cylinder is fixedly connected with the slide block, the cylinder body of the second cylinder is vertically fixedly connected with the slide block, the lower end of a piston rod of the second cylinder is in fixed connection with the heating device, an outwardly protruding heating module fitting an inner concave surface of the water nozzle joint is arranged on the upper end surface of the heating device, an inwardly concave heating module fitting an external circular surface of a plastic tube is arranged on the lower end surface of the heating device, the cylinder body of the third cylinder is vertically fixedly connected with the support, and the lower end of a piston rod of the third cylinder is in detachable connection with the water nozzle joint. According to the invention, through control of the cylinder assembly, high efficiency welding of the water nozzle joint with the plastic tube is realized, welding deviation between the water nozzle joint and the plastic tube is reduced and welding strength is reduced.
Owner:BEIJING GUODIAN FUTONG SCI & TECH DEV +2

Batch bending testing device and method of flexible display screen

ActiveCN105547857AMeet the needs of bending testingNo cumulative effectMaterial strength using steady bending forcesEngineeringCircular surface
The invention discloses a batch bending testing device of a flexible display screen. The testing device comprises a plurality of bent rolling shafts which are arranged in parallel, wherein a first driving membrane layer and a second driving membrane layer are arranged among the plurality of bent rolling shafts; the first driving membrane layer and the second driving membrane layer are leveled and are wound on the external circular surfaces of all bent rolling shafts in sequence, and are separated on the first bent rolling shaft and the final bent rolling shaft; a tested flexible display screen is arranged between the first driving membrane layer and the second driving membrane layer; each bent rolling shaft is driven to rotate so that the first driving membrane layer, the second driving membrane layer and the flexible display screen are driven to be subjected to a bending test synchronously along the external circular surfaces of the plurality of bent rolling shafts. The two driving membrane layers provided by the invention are used for bending the tested flexible display screen inwards sometimes and outwards sometimes along the external circular surfaces of the plurality of bent rolling shafts under the driving of a first unwinding roller and a second winding roller; an accumulation effect is not generated in a bending process, and requirements on the bending test of the flexible screen by mass production are met.
Owner:KUNSHAN NEW FLAT PANEL DISPLAY TECH CENT
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