Welding section control device and method of its control with selecting area for evaporation glowing and thermal emission selection

FIELD: electricity.

SUBSTANCE: welding laser beam is emitted along the welding path, located on the parts to be welded, and can also radiate the reference laser beam along the scanning path, located in the melt bath on the parts to be welded, which are melted by emission from the welding laser beam. At that the response light emission from the welding area is received, and the quality control of the welded section is performed by comparing the Fourier transform, performed for the ratio between the intensity of the first light emission response component, containing the glowing of the vapour and the intensity of the second component, containing the heat emission light or for the relation changing rate between the indicated intensities, with the specified threshold value.

EFFECT: using of the invention makes it possible to improve the accuracy of the defects control in the welded section.

8 cl, 20 dwg

 



 

Same patents:

FIELD: medicine.

SUBSTANCE: device for making stents comprises a core and a sleeve. The core has a rigid and substantially cylindrical outer surface. The sleeve surrounds the core and has a variable inner diameter. The sleeve has a rest inner diameter. The core has an outer diameter. The rest inner diameter is less than the outer diameter. That provides extending the sleeve when fitting the core, and substantially placing it back to the inner rest diameter after the core is removed. According to the second version of the device for making the stents, the sleeve has a variable rest diameter and a working diameter. The working diameter is less than the rest diameter. The sleeve surrounds the core and contacts thereto, when the sleeve obtains the rest diameter. An auxiliary unit for making the stents comprises the sleeve having the inner diameter and configured to extend from the rest diameter to the working diameter after applying the expansive force. The working diameter is more than the rest diameter, which the sleeve has at rest. The sleeve is configured to place back to the rest diameter after the expansive force is removed from there. A method for making the stent by means of the device for making the stents according to the first version providing contacting the sleeve to the core for fastening the sleeve on the core. That is followed by contacting the sleeve to a metal relief sheet. The above sheet is then wrapped about the device, and the sheet ends are welded up to form the stent.

EFFECT: invention provides the protection of the upper surface of the stent during the making process.

30 cl, 9 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to control over laser processing process. Proposed method comprises the following jobs: registration of at least two measured current magnitudes by at least one sensor that controls the laser processing and definition of at least two current magnitudes of at least two current measured magnitudes. At least two current magnitudes represent a characteristic attribute in the space of magnitudes. Classification of laser processing by definition of the position of current characteristic attribute relative to predetermined set of points in space of magnitudes. At least one sensor comprises at least one camera unit to shoot pictures with different exposures and to translate them by high dynamic ranges method (HDR) into pictures of current measured magnitudes with high contrast factor.

EFFECT: better processing.

18 cl, 19 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to control over laser processing process. Proposed method comprises the following jobs: registration of at least two measured current magnitudes by at least one sensor that controls the laser processing and definition of at least two current magnitudes of at least two current measured magnitudes. At least two current magnitudes represent a characteristic attribute in the space of magnitudes.

EFFECT: classification of laser processing by definition of the position of current characteristic attribute relative to predetermined set of points in space of magnitudes.

15 cl, 19 dwg

FIELD: machine building.

SUBSTANCE: laser processing is performed using with material processing zone illumination at frequency other than that of laser processing. Laser beams reflected from processed material and illumination beams are passed through focusing lens. Laser beams reflected from processed material and illumination beams are divided by rotary diachronic mirror. Illumination beams are focused in TV camera. Achromatic focusing lens is used to this end while illumination frequency is selected in visible spectrum green section.

EFFECT: higher quality of processing owing to remote control over processing.

1 dwg

FIELD: measurement equipment.

SUBSTANCE: method includes measurement of time dependence of thermal radiation recorded on a rear side of a processed material relative to the influencing laser radiation.

EFFECT: simplified process of measurements and expanded functional capabilities due to provision of the possibility to measure oscillations of temperature in deep melting channels.

2 cl, 2 dwg

FIELD: technological processes.

SUBSTANCE: invention relates to laser technological complex for treatment of large-size objects. Complex comprises technological laser, elements of laser radiation transportation, in the form of rotary mirrors, optical-focusing head with mechanism of its displacement along three coordinates and technological table for treated item. Technological table is arranged in the form of two platforms arranged one over another. Upper platform is arranged as movable in plane parallel to lower platform. Mechanism for billet fixation is installed on lower platform. Upper platform is arranged with the possibility to provide for rotation by 90 degrees relative to lower platform and to fix it in this position. Optical-focusing head is arranged in the form of body, in cavity of which there is a unit of fixation of spherical focusing mirror, which is placed on its wall. On opposite parallel wall there is a rotary flat mirror fixed at the distance l=F-(lndl/tga+2Df.m.), where F-focus distance of spherical mirror, mm, dl - diametre of laser beam, mm, Df.m. - diametre of flat mirror, mm. Unit of fixation is arranged with the possibility of its rotation by 90, displacement and fixation in horizontal direction relative to laser beam falling point at flat mirror arranged at the angle of 45.

EFFECT: invention makes it possible to expand functionality, to increase efficiency of laser complex operation and to improve quality of billets treatment.

4 dwg

FIELD: technological processes.

SUBSTANCE: invention is related to method and system of application of sign and graphic information on items and may be used for laser marking, engraving in different fields of engineering. Physicochemical transformation of multi-layer coating is implemented by means of laser radiation effect onto stock with constant monitoring of parameters and correction of program of sign and graphic information application. System consists of laser radiation source, optical system for focusing of radiation and deflection system, which have control input from computer, system of stock fixing, analysing device, which is installed in system of stock fixing, and external source of light with variable brightness.

EFFECT: provides repetition and homogeneity of light technical properties of items; reduction of cost of their manufacture.

2 cl, 2 dwg

FIELD: method and apparatus for forming weakening lines in member of automobile lining covering devices with safety cushions in order to create one or more hinged flaps of window for spreading out pneumatic safety cushion when the last is pumped.

SUBSTANCE: method comprises steps of making notch in surface of lining member by means of cutting beam directed from source 12 onto said surface at moving lining member relative to source 12 according to predetermined pattern of notch; tracking cutting result by means of measuring beams irradiated by first pickup 26 and second outer pickup respectively placed in opposite sides relative to lining member 16; combining measuring beam of pickup 26 with cutting beam in such a way that to provide collinear combined segments on surface of lining member and to direct them constantly to the same points of notch pattern; controlling quantity of material removed by means of cutting beam in each point along pattern due to controlling notch cutting process with use of feedback signals generated by first 26 and second 20 pickups. Apparatus for performing the method includes source of cutting beam for making notch on surface of one side of lining member at directing cutting beam to said surface; drive unit imparting mutual relative motion of cutting beam source and lining member according to predetermined pattern; sensor unit for tracking thickness of remained material of lining member; device for combining beams; control unit for tracking process of cutting notch in each point along predetermined pattern and regulating cutting intensity of cutting beam for providing predetermined thickness of material of lining member. Sensor unit includes first inner pickup 26 and second outer pickup 20 arranged at mutually opposite sides of lining member 16 and directed towards each point of lining member to be notched. Inner pickup and cutting beam source are arranged at the same side relative to lining member.

EFFECT: possibility for making weakening lines during one pass at accurate reproducibility regardless of variation of cutting depth, cutting angle, patterns of notch, non-uniformity and color of material, texture of material surface and so on.

41 cl, 8 dwg

FIELD: method and apparatus for forming weakening lines in member of automobile lining covering devices with safety cushions in order to create one or more hinged flaps of window for spreading out pneumatic safety cushion when the last is pumped.

SUBSTANCE: method comprises steps of making notch in surface of lining member by means of cutting beam directed from source 12 onto said surface at moving lining member relative to source 12 according to predetermined pattern of notch; tracking cutting result by means of measuring beams irradiated by first pickup 26 and second outer pickup respectively placed in opposite sides relative to lining member 16; combining measuring beam of pickup 26 with cutting beam in such a way that to provide collinear combined segments on surface of lining member and to direct them constantly to the same points of notch pattern; controlling quantity of material removed by means of cutting beam in each point along pattern due to controlling notch cutting process with use of feedback signals generated by first 26 and second 20 pickups. Apparatus for performing the method includes source of cutting beam for making notch on surface of one side of lining member at directing cutting beam to said surface; drive unit imparting mutual relative motion of cutting beam source and lining member according to predetermined pattern; sensor unit for tracking thickness of remained material of lining member; device for combining beams; control unit for tracking process of cutting notch in each point along predetermined pattern and regulating cutting intensity of cutting beam for providing predetermined thickness of material of lining member. Sensor unit includes first inner pickup 26 and second outer pickup 20 arranged at mutually opposite sides of lining member 16 and directed towards each point of lining member to be notched. Inner pickup and cutting beam source are arranged at the same side relative to lining member.

EFFECT: possibility for making weakening lines during one pass at accurate reproducibility regardless of variation of cutting depth, cutting angle, patterns of notch, non-uniformity and color of material, texture of material surface and so on.

41 cl, 8 dwg

FIELD: technological processes.

SUBSTANCE: invention is related to method and system of application of sign and graphic information on items and may be used for laser marking, engraving in different fields of engineering. Physicochemical transformation of multi-layer coating is implemented by means of laser radiation effect onto stock with constant monitoring of parameters and correction of program of sign and graphic information application. System consists of laser radiation source, optical system for focusing of radiation and deflection system, which have control input from computer, system of stock fixing, analysing device, which is installed in system of stock fixing, and external source of light with variable brightness.

EFFECT: provides repetition and homogeneity of light technical properties of items; reduction of cost of their manufacture.

2 cl, 2 dwg

FIELD: technological processes.

SUBSTANCE: invention relates to laser technological complex for treatment of large-size objects. Complex comprises technological laser, elements of laser radiation transportation, in the form of rotary mirrors, optical-focusing head with mechanism of its displacement along three coordinates and technological table for treated item. Technological table is arranged in the form of two platforms arranged one over another. Upper platform is arranged as movable in plane parallel to lower platform. Mechanism for billet fixation is installed on lower platform. Upper platform is arranged with the possibility to provide for rotation by 90 degrees relative to lower platform and to fix it in this position. Optical-focusing head is arranged in the form of body, in cavity of which there is a unit of fixation of spherical focusing mirror, which is placed on its wall. On opposite parallel wall there is a rotary flat mirror fixed at the distance l=F-(lndl/tga+2Df.m.), where F-focus distance of spherical mirror, mm, dl - diametre of laser beam, mm, Df.m. - diametre of flat mirror, mm. Unit of fixation is arranged with the possibility of its rotation by 90, displacement and fixation in horizontal direction relative to laser beam falling point at flat mirror arranged at the angle of 45.

EFFECT: invention makes it possible to expand functionality, to increase efficiency of laser complex operation and to improve quality of billets treatment.

4 dwg

FIELD: measurement equipment.

SUBSTANCE: method includes measurement of time dependence of thermal radiation recorded on a rear side of a processed material relative to the influencing laser radiation.

EFFECT: simplified process of measurements and expanded functional capabilities due to provision of the possibility to measure oscillations of temperature in deep melting channels.

2 cl, 2 dwg

FIELD: machine building.

SUBSTANCE: laser processing is performed using with material processing zone illumination at frequency other than that of laser processing. Laser beams reflected from processed material and illumination beams are passed through focusing lens. Laser beams reflected from processed material and illumination beams are divided by rotary diachronic mirror. Illumination beams are focused in TV camera. Achromatic focusing lens is used to this end while illumination frequency is selected in visible spectrum green section.

EFFECT: higher quality of processing owing to remote control over processing.

1 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to control over laser processing process. Proposed method comprises the following jobs: registration of at least two measured current magnitudes by at least one sensor that controls the laser processing and definition of at least two current magnitudes of at least two current measured magnitudes. At least two current magnitudes represent a characteristic attribute in the space of magnitudes.

EFFECT: classification of laser processing by definition of the position of current characteristic attribute relative to predetermined set of points in space of magnitudes.

15 cl, 19 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to control over laser processing process. Proposed method comprises the following jobs: registration of at least two measured current magnitudes by at least one sensor that controls the laser processing and definition of at least two current magnitudes of at least two current measured magnitudes. At least two current magnitudes represent a characteristic attribute in the space of magnitudes. Classification of laser processing by definition of the position of current characteristic attribute relative to predetermined set of points in space of magnitudes. At least one sensor comprises at least one camera unit to shoot pictures with different exposures and to translate them by high dynamic ranges method (HDR) into pictures of current measured magnitudes with high contrast factor.

EFFECT: better processing.

18 cl, 19 dwg

FIELD: laser engineering.

SUBSTANCE: present invention relates to laser machining head for a laser machining unit (versions) and a laser machining unit. Laser machining head comprises a mount(2) for a sensor part (3), made from electrically conductive material, an outer insulation unit (4) made from electrical insulating material, such as plastic, for electric shielding and an inner insulation part (5) inserted into the outer insulation part (4) as radiation shield. Inner insulation part (5) is made from metal and is electrically insulated from the sensor part (3).

EFFECT: longer service life of the laser machining head, since any radiation damage of the laser head due during its use is excluded.

35 cl, 3 dwg

FIELD: laser engineering.

SUBSTANCE: group of inventions relates to method and a laser cutting system. According to the invention, a laser cutting process is controlled, using as reference signal one or more emission lines, which are characteristic of the radiation, emitted by a assisting gas or a contaminant gas, present in the material volume, irradiated by the laser beam, focussed by laser head (12), based on the detected signal, at least one of the following process control parameters: power of the laser, frequency and the duty cycle of the laser pulse, pressure of an assisting gas, emitted by nozzle (16) forming part of laser head (12), relative speed of laser head (12) with respect to workpiece (P), distance between laser head (12) and surface (S) of workpiece (P), and the distance between focal point (F) of the laser beam and surface (S) of workpiece (P) are being adjusted.

EFFECT: technical result is improved quality of laser cutting.

12 cl, 12 dwg

FIELD: pipes.

SUBSTANCE: invention relates to pipe scanning method, intended for processing at laser cutting machine. Method includes stages, at which: a) emitting focused laser beam by cutting head (50) of laser cutting machine so, that to prevent pipe material (T) cutting or etching; b) moving cutting head (50) along scanning specified direction (x); and c) during cutting head (50) movement along scanning direction (x) detecting by means of corresponding radiation sensors (56), reflected or irradiated by pipe (T), and install successively point by point, based on signal provided by sensors (56),

presence or absence of pipe material (T).

EFFECT: invention enables to measure cutting point position on pipe surface regardless of pipe position on laser cutting machine and from pipe shape.

6 cl, 8 dwg

FIELD: medicine.

SUBSTANCE: device for making stents comprises a core and a sleeve. The core has a rigid and substantially cylindrical outer surface. The sleeve surrounds the core and has a variable inner diameter. The sleeve has a rest inner diameter. The core has an outer diameter. The rest inner diameter is less than the outer diameter. That provides extending the sleeve when fitting the core, and substantially placing it back to the inner rest diameter after the core is removed. According to the second version of the device for making the stents, the sleeve has a variable rest diameter and a working diameter. The working diameter is less than the rest diameter. The sleeve surrounds the core and contacts thereto, when the sleeve obtains the rest diameter. An auxiliary unit for making the stents comprises the sleeve having the inner diameter and configured to extend from the rest diameter to the working diameter after applying the expansive force. The working diameter is more than the rest diameter, which the sleeve has at rest. The sleeve is configured to place back to the rest diameter after the expansive force is removed from there. A method for making the stent by means of the device for making the stents according to the first version providing contacting the sleeve to the core for fastening the sleeve on the core. That is followed by contacting the sleeve to a metal relief sheet. The above sheet is then wrapped about the device, and the sheet ends are welded up to form the stent.

EFFECT: invention provides the protection of the upper surface of the stent during the making process.

30 cl, 9 dwg

FIELD: electricity.

SUBSTANCE: welding laser beam is emitted along the welding path, located on the parts to be welded, and can also radiate the reference laser beam along the scanning path, located in the melt bath on the parts to be welded, which are melted by emission from the welding laser beam. At that the response light emission from the welding area is received, and the quality control of the welded section is performed by comparing the Fourier transform, performed for the ratio between the intensity of the first light emission response component, containing the glowing of the vapour and the intensity of the second component, containing the heat emission light or for the relation changing rate between the indicated intensities, with the specified threshold value.

EFFECT: using of the invention makes it possible to improve the accuracy of the defects control in the welded section.

8 cl, 20 dwg

FIELD: electricity.

SUBSTANCE: welding laser beam (L1) is emitted along the welding area (C11, C12), located on the welded parts (W1, W2) and can also emit the reference laser beam (L5) along the scanning path (C51, C52), located in the melt bath (Y1) on the parts to be welded (W1, W2), which are melted by emission from the welding laser beam (L1). In this case, the response light emission from the welding area is received, and the welded section defects detection is performed by comparing the intensity change frequency of the response light emission received by the light receiving unit, obtained as the result of the Fourier transform or differentiation of the mentioned intensity, with the special frequency, determined by the bath surface oscillation frequency of the welded section at the defect-free state.

EFFECT: using of the invention makes it possible to improve the accuracy of the defects control in the welded section.

4 cl, 13 dwg

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