335 results about "Superficial mass" patented technology

The invention relates to a method for automatic inspection of the surface 20 of a moving object, in which a region on the object's surface is illuminated from at least two different illumination directions 13-15. The object's illuminated surface region is imaged with a camera to provide image information for analysis. The light sources in the different illumination directions 13-15 are pulsed to illuminate the object's surface region at different times, the pulsing frequency being >1 kHz The object's illuminated surface region is imaged as lines with a line scan camera 21 in sync with the above pulsing. The invention also relates to an arrangement for inspecting the surface 20 of a moving object, the arrangement comprising at least two light sources 10-12 in at least two different illumination directions 13-15 for illuminating the surface region of the object under inspection; a camera for imaging the object's surface region; and an image analyzer for analyzing the image information acquired from the object's surface 20 by imaging. The light sources 10-12 illuminate the object's surface 20 from the different illumination directions 13-15 at different times, and the camera is a line scan camera 21. The arrangement further comprises a timing controller 18 for synchronous pulsing of the light sources 10-12 and the at least one line scan camera 21, the pulsing frequency of the light sources 10-12 being >1 kHz.

The invention discloses a reinforcing method of aluminium alloy surface fused and covered by laser, which comprises the following steps: 1. predisposing aluminium alloy base; 2. allocating laser fusing and covering material with the bulk rate of Al-Si alloy powder and SiC ceramic powder at 1:(4-2); setting the Si content in the Al-Si alloy at 10-15(wt%) with grain size at - 140-+325; setting the grain size of SiC at -200; 2. modulating evenly blended fusing and covering material into paste through soluble glass; coating on the surface of aluminium alloy with thickness at 0.8-1.2mm; drying at 100-150 deg.c for 0.5-2h; 4. adopting crossflow CO2 laser to irradiate the coated layer on the surface of aluminium alloy base; setting the output power of laser at 3-4kW and optical beam scanning velocity at 2-5mm/s and optical spot dimension at 1-4mm; protecting fusing pond through high-purity argon in the laser fusing and covering course with argon flow at 20-30L/min.

The invention discloses a ceramic processing surface damage detection system, which collects the processing status of the processing surface in the high-efficiency precision grinding process and the characteristic data of the grinding surface topography by the computer, and performs classification processing to obtain the edge contour characteristics of the damage, and identify The macro-quantitative index surface breakage rate, stability, diffusion and damage characteristic parameters that characterize the damage degree of the processed surface are extracted, combined with computer digital image processing technology and algorithms, to complete the detection and evaluation of ceramic surface processing damage. Compared with the existing technology, the system can effectively detect the surface damage type, characteristics, and surface damage degree of advanced ceramics and other related materials, and can be used as an important reference index for comprehensively evaluating the surface quality of ceramic processing. The detection software written in the system is simple and practical, low in cost, more conducive to popularization, reliable and effective, and has greater economic benefits.

A differential diameter hole drilling method by which through-holes having improved major surface quality are formed in a target material involves drilling a pilot hole having a diameter that is less than the desired diameter of the through-hole and then drilling a through-hole having the desired diameter. The pilot hole forms a channel from which thermal energy produced during laser drilling can diffuse into the environment, thereby reducing the amount of thermal energy diffusing into the surrounding target material matrix and the degree of thermal damage to the heat affected zone of the target material matrix. The pilot hole also forms a channel through which ablated target material may be removed, thereby increasing overall through-hole throughput. Pilot hole formation reduces the thermal energy required to form the remaining portion of the through-hole and thereby results in less thermal damage to the surrounding target material matrix.

This invention is a method to enhance by orders of magnitude accurate, real-time, stand-off detection by a sensor using Raman spectra of one or more trace compounds of interest (particularly explosives, bioterror organisms, or Volatile Organic Compounds). A colloid, whose medium of suspension is a liquid solvent with a weak Raman spectrum and in which are suspended particles of a noble metal that are preferentially nano-sized to maximize the surface-to-mass ratio for each particle, forms an impingement base. A sample of this colloid is air-pumped through a sampling module, exposed to air potentially carrying trace molecules from the compound of interest, then sent to a detection module that subjects the sample to Raman spectroscopy. The result is first corrected to obtain a unique Raman spectra from the trace molecules, then matched against Raman spectra in a database. Extensions include modifying, flushing, further processing, or recirculating the colloid sample.

Sheet metal forming is a manufacturing process in which flat sheet metal is drawn into a die cavity to form a product shape. Draw-in amount is the single most important stamping index that controls all forming characteristics (strains and stresses), formability failures (splits, wrinkles) and surface quality (distortions) on a panel. Adaptation of a new die set for repetitively stamping sheet metal parts to a part design specification is simplified by using a math-based simulation of the stamping operation under specified engineering stamping conditions for the specified part. The stamping simulations are used to create an engineered draw-in map comparing selected locations on the peripheral edge of the stamped part with corresponding locations on the peripheral edge of its original sheet metal blank. The resulting map of sheet metal draw-in dimensions reflect suitable displacements of the metal sheet between the binder ring and binder surface of the female die member at all such locations as the punch member of the die set executes its stamping operation. The engineered draw-in dimensions for a simulated part identify specific locations for adjustment of the binder ring/binder surface system in adapting the die set for production of parts.

The invention discloses a precise machining method for a capillary tube for a biodegradable magnesium alloy intravascular stent. The method comprises the following steps of: step 1, performing stress relief annealing and machining on a magnesium alloy extrusion bar to obtain a tube blank; step 2, extruding the tube blank to obtain a seamless extrusion tube blank, and performing stress relief annealing; step 3, performing multi-pass rolling and annealing on the annealed seamless extrusion tube blank to obtain a thin tube blank; and step 4, performing multi-pass drawing and annealing on the thin tube blank to obtain the capillary tube for the biodegradable magnesium alloy intravascular stent. The capillary tube produced by the method disclosed by the invention is accurate in dimension (a wall thickness error is not greater than 5%), can be more than 1 metre long, is high in surface quality, uniform in matrix structure, excellent in mechanical property, low in machining cost and high in machining efficiency, and can be subjected to industrialized batch production.

A method for controlling the elongation percentage, plate shape, etc in the skin rolling procedure of band steel features that an elongation percentage control unit, a plate shape control unit and an integrated control unit for both elongation percentage and plate shape are used, which use respectively three different optimizing algorithms to be used in a single iterative calculation procedure consisting of multiple optimizing calculation sub-procedures.

A technology for forming the Mg-alloy hub of car features three procedures of preshaping, upsetting-squeezing formation and fine trimming and includes such steps as casting a blank; after preshaping,making allowance for apsetting-squeezing formation; upsetting-squeezing formation and deformation degree during isothermal squeezing by using the critical-controlled deformation method; coating graphite lubricant inside the die; and fine trimming. Its advantages are fine crystal grains, and high mechanical performance and surface quality.

Provided is an optimal setting method for the relationship curve of the emulsion flow and the rolling speed in the cold rolling process. The method mainly comprises the following steps: 1, collecting main equipment and process parameters of a cold rolling unit; 2, defining the process parameters involved in the optimization process of the emulsion flow; 3, calculating the roll bending force of a rack working roll; 4, initializing the emulsion flow coefficient; 5, calculating the set value of the emulsion flow corresponding to Vi; 6, calculating the friction coefficient mui corresponding to Vi; 7, calculating the rolling pressure, slipping factor and thermal slipping injury index corresponding to Vi; 8, solving the objective function; 9, outputting the best emulsion flow coefficient, and determining the relationship curve of the best emulsion flow and speed. The method has the advantages that the overall fluctuation rate and the maximum fluctuation rate of the rolling pressure can be kept smaller during the speed-up and speed-down process, and it is ensured that the slipping and thermal slipping defects are prevented from occurring in the rolling process, thus the surface quality and the strip shape control precision of strip steels are improved.

A method and apparatus for inspecting patterned substrates, such as photomasks, for unwanted particles and features occurring on the transmissive as well as pattern defects. A transmissive substrate is illuminated by a laser through an optical system comprised of a laser scanning system, individual transmitted and reflected light collection optics and detectors collect and generate signals representative of the light transmitted and reflected by the substrate. The defect identification of the substrate is performed using transmitted and reflected light signals from a baseline comparison between two specimens, or one specimen and a database representation, to form a calibration pixelated training set including a non-defective region. This calibration pixilated training set is compared to a transmitted-reflected plot map of the subject specimen to assess surface quality.

The invention relates to a thin-walled circular type investment casting shell and a preparation method thereof, aiming at solving the defects that for the existing high-temperature alloy large thin-walled complicated circular type casting shell production technology, the casting pouring steel leaks, the surface quality is bad, the casting is difficult to clean, the size precision is low and the like, and belonging to the technical field of an aeroengine. A shell is made of new surface layer refractory powder, a back layer refractory powder and a sand lining material, and the invention provides a formula for all layers of paints of the shell; in addition, the invention further provides a manufacturing method of the thin-walled circular type investment casting shell, and the manufacturing method comprises the following steps: performing oil removal treatment on the surface of a wax mold module, carrying out paint preparation, sand lining and drying, shell dewaxing and shell roasting procedures, and particularly, the reinforcement step is added during the sand lining process, so that the shell has excellent high-temperature performance and good collapse performance at low temperature, and can bear molten metal with the pouring temperature being higher than 1600 DEG C, and can be used for casting high-temperature alloy large thin-walled circular vacuum castings such as K4169, K438, K418 and K4648.

The invention discloses a system for quickly measuring surface quality. The system comprises two sets of common-path interferometers, wherein one set of reference interferometer for noise compensation is specially used for detecting noises such as vibration, air disturbance and the like in environment, and eliminating the influence of interference of the background noises through negative feedback; and the other set of main interferometer for measurement controls wavelength of optical wave incident to the interferometers by using an acousto-optic filter, and can quickly acquire a three-dimensional feature of a surface to be measured by processing a generated interference signal by using large-scale parallel computation based on GPGPU. The system can measure the surface quality in real time, does not need mechanical light path scanning in the process of measurement, and can reach a high measurement speed. The system can be updated one time in 1 to 2 seconds on average, and can be updated more frequently after being optimized. The system can reduce influence of environmental noise on the measurement by adding the active optical path compensation technology, achieves measurement accuracy of sub-nano range, reduces cost, saves a usually expensive high-precision translation stage and can be used for processing workshops with more interference.

The invention discloses chemical mechanical polishing liquor for blue stone underlay, which is characterized by the following: this liquor includes pH adjusting agent, surface activator, water medium and compound grinding particle; the compound grinding particle is constructed through coating one deck particle on the surface of base material particle boron carbide. The polishing speed of blue stone underlay can reach 180nm/min and surface coarseness can decrease to below 7.5.

Ultra-precision freeform surfaces are important to the development of complex and micro-optical-electro-mechanical devices used in many photonics and telecommunication products such as F-theta lenses for laser printers. These surfaces are complex and large scale surface topologies with shapes that generally possesses no rotational symmetry. Due to the geometrical complexities of these ultra-precision freeform surfaces, it is difficult to characterize the form accuracy and surface quality of freeform optical surfaces. The method of this invention is based on feature-point pre-fixture, and iterative precision alignment algorithm, which can provide sufficient capability of form characterization for ultra-precision freeform surfaces with form accuracy down to below sub-micrometer range

The invention discloses a line structured light-based cast workpiece surface quality detection method and a system thereof. The method comprises the following steps: scanning a workpiece by using line-structured lights and an imaging unit to obtain three-dimensional point cloud of the workpiece, slicing the original three-dimensional model of the workpiece and carrying out planar vectorization on the three-dimensional point cloud of the workpiece to obtain three-dimensional contour data of the original three-dimensional model and the workpiece to be detected, carrying out rotating, movement, fitting pre-estimation and other operations on the obtained three-dimensional contour data, calculating the similarity layer by layer, marking a part with low similarity, and calculating the integral similarity of the original three-dimensional model and the workpiece to be detected. Compared with the prior art, the method disclosed in the invention can be used to detect the problems of cast workpieces through an automatic and quantified flawless detection technology, and solves the problems of low efficiency, incomplete detection and unable quantification of manual detection.

A rolling schedule comprehensive optimization method for a cold continuous rolling unit taking scratch prevention as an objective mainly comprises the following steps that 1, main equipment and technological parameters of the cold continuous rolling unit with five machine frames are collected; 2 procedure parameters involved in a rolling schedule optimization procedure are defined; 3, the ability of the unit to regulate the outlet plate shapes is improved; 4, initial values of reduction rates epsilon<i0> of the first machine frame, the second machine frame, the third machine frame and the fourth machine frame and initial values of outlet tension force T<i0> of the first machine frame, the second machine frame, the third machine frame and the fourth machine frame are given; 5, an initial value of the reduction rate of the fifth machine frame is calculated; 6, rolling pressure, rolling power, slipping factors, and the outlet plate shape value of each machine frame are calculated; 7, the value of a scratch comprehensive judgment index lambada of each machine frame is calculated; 8, an optimized objective function is calculated; 9 the optimal rolling schedule is output; the steps are executed through a computer. By means of the rolling schedule comprehensive optimization method, the scratch comprehensive judgment index of each machine frame can be predicted accurately, the occurrence possibility of scratch defects is reduced to the greatest extent, production efficiency is increased, and outlet surface quality of strip steel is improved.