Grille air conditioner louver board mounting structure

The utility model discloses an installation structure of a louver board of a grille air conditioner. Wherein the frame is used for being installed on a wall, the louver boards are installed in the frame, the pressing strips are installed on the frame in a compression clamping mode, and the pressing strips abut against the louver boards through resilience force generated by compression of the pressing strips so that the louver boards can be limited in the frame. According to the utility model, the louver board is firstly mounted in the frame and is fixed in the frame by the pressing strip, andthe louver board can be simply mounted and dismounted by the pressing strip, so that the louver board can be conveniently and timely cleaned, and the air conditioner can achieve the effect of keepingnormal air exhaust for a long time; meanwhile, a hinge structure and a tower buckle structure are respectively arranged on two symmetrical sides of the frame; the frame can be opened and closed very conveniently ...

Digital driving circuit for main circuit of silicon controlled welding machine

The present invention adopts digital signal processor DSP as main control kernel, the input voltage of two windings of secondary of main transformer which are opposite in phase and positioned on sameiron core is passed through resistor and voltage regulator tube and added on the output optical coupler of A.C. input transistor to obtain synchronous signal; DSP event supervisor can trap rising edge of synchronous signal to produce interrupt request, DSP kernel can be transferred into interupt service program to detect the analog quantity on control panel of silicon controlled welding machine, the analog quantity can be changed into digital quantity by means of conversion module in DSP, said digital quantity is undergone the process of initialization by means of three universal timers in DSP.

Power source for welding digital array transistor

The present invention relates to a digital code array transistor welding power supply, mainly including three-phase step-down rectifying filtering circuit, 2n*XK transistor array and signal feedback and control icrcuit, etc. The power transistor array is arranged according to 2n*XK digital code array, every transistor is an electronic switch, and the currents flowed through all the transistors possess geometric series relationship, their phases are mutually alternative to form continuous superimposed pulse duration, and the microcomputer can utilize the decryption of input signal to define switching-on and switching-off of transsistor in the transistor array so as to implement closed-loop control of said system. Said invention possesses digital code characteristics, raises control accuracy, has good static property and dynamic property and implements digitalization of main circuit.

Method for controlling length of pulsed gas metal arc welding

Gear and its production method

The present invention relates to a gear and its production method. Said gear is made up by using several toothed sheets with identical tooth outline and superimposing them in the mode of aligning tooth profile or alternating them in a certain order, and fixedly connecting them. Its production method includes the following steps: punching thin sheet into toothed sheet, suporimposing toothed sheetsand connecting them together by mechanical process or adhesive process in the mode of aligning their tooth profile and alternating them according to a certain order to form a whole body gear.

Dynamic detecting equipment of pump internal axle axial fitting gap

The present invention relates to a detection equipment for detecting axial gap of inner spindle of pump body. Said detection equipment includes upper holddown mechanism, workpiece positioning mechanism, axial lifting mechanism and inner spindle rotating mechanism. Its upper holddown mechanism includes steam cylinder or oil cylinder, reference holddown block, press-in cylinder block, press-in motor, reductor, synchronous band, puller lever, press-in position sensor and height measurement sensor.

Trousers with selvage

Method for laser butt-welding copper or aluminum and carbon steel

Electronic beam welder with separated wire-feeding chamber for low-vacuum wire feeding and its method

An electronic beam welder is composed of mechanical pump of working chamber, boost pump, electronic gun, low-vacuum working chamber, sealing mechanism of wire-feeding tube, mechanical pump of wire-feeding chamber and independent wire-feeding chamber. A pressure pump is between the mechanical pump of working chamber and low-vacuum working chamber. The electronic gun is at upper part of low-vacuum working chamber. The mechanical pump of wire-feeding chamber is communicated with wire-feeding chamber. The sealing mechanism is used to communicate low-vacuum working chamber with wire-feeding chamber or seal them to each other. When welding starts, the low-vacuum working chamber is communicated with the wire-feeding chamber, and when welding is finished, they are isolated with each other.

Sputter coating ion beam irradiation reinforcing method

Antiskid fastener for building

Braze welding technology for vacuum insulating utensils of stainless-steel

The said braze welding processes include the pretreatment of utensil to be welded, heating degassing in vacuum chamber, braze welding via fast local HF induction heating, natural cooling in vacuum chamber and fast cooling outside vacuum chamber. The braze welding apparatus consists of HF induction winding over the vacuum chamber, coils with skeleton sepatately inside and outside the workpiece inside vacuum chamber, lid with evacuating port and brazing agent, and the hinged top cover with diamagnetic window.

Metal sputtering low-temperature preparation method for crystallized TiO2 film

Starting method for gas metal-arc welding

Light duplex fastener for building

A light duplex fastener for building is composed of two swing screw bolts, a duplex lower fastener, two upper fasteners and stop block in the center of said duplex lower fastener. Said duplex lower fastener has a small end joined to swing screw bolt and a big end joined to upper fastener with notch and thrust surface. Its advatnages are simple structure, low cost, light weight and high reliability.

Trousers with a printed pattern

Digital signal processor control method of gas metal-arc welder

Method of digital signal processor control gas metal arc welding machine is that after digital signal processor is program compiled and inputted, it directly control the silicon controlled rectifier circuit connected with output end of power source transformer and allocated wire feeding circuit, the network voltage compensation for stabilizing welding perometers is directly controlled by program in digital signal processor through network voltage detecting circuit, the welding arc current and welding arc voltage feedback arc processed by digital signal processor, then real time controlled according to program. The present invention possesses substantive characteristics and obvious progress, and realizes digital control of welding machine.

Manipulator clamping apparatus and tool exchanging equipment for cutting and ruling device

Method for adjusting self-tracing pose of mobile welding robot

The invention relates to a method for adjusting the self-tracing pose of a mobile welding robot, which belongs to the technical field of automatic welding. The method comprises the following steps: getting the welding robot march toward the direction at an entrance angle of less than or equal to 90 degree, and searching a weld joint according to a characteristic model of a welding groove; according to the pose of the welding robot and the distortion characteristics of laser streaks projected on the groove, obtaining the initial entrance angle of the mobile welding robot; performing differential preadjustment to make the entrance angle of the mobile welding robot less than or equal to 20 degree; and applying a least square method to perform preweld self-tracing pose adjustment to position the mobile welding robot under the weld joint, wherein a bodywork of the mobile welding robot is parallel to the weld joint and a welding gun is positioned in the center of the weld joint. The method adopts ...

精密气体配比器

The present invention relates to instrument and meter. The precise gas proportioning device of the present invention includes gas inlet, gas flow rate and proportion control system, gas mixer and gas mixture outlet connected together. The gas flow rate and proportion control system includes two or more channels of gas flow rate and proportion control subsystem. The present invention is used inthe fields needing precise control of gas component in gas mixture in microelectronic processing, precise analysis, special welding, material purification, etc. to provide gas mixture with reliable proportion, and is favorable to regulating and stabilizing technological parameters and reaching other aims accurately.

Cutter head and manufacturing method thereof

The invention provides a cutter head and a manufacturing method thereof. The cutter head is adaptive to grinded objects of cement stones provided with soft plastic in a pouring manner. The cutter head is provided with a grinding portion which is in a block shape and which is sintered through diamond powder and functional metal powder. The grinding portion is fixed to a plurality of carbide particles or polycrystalline diamond particles, protruding to a grinding face, and parts of the carbide particles or polycrystalline diamond particles are embedded into the grinding portion. The cutter head is formed by compounding the carbide particles or polycrystalline diamond particles, the diamond powder and the functional metal powder, the grinded objects of the cement stones provided with the soft plastic in the pouring manner can be grinded effectively, the manufacturing method is simple and ingenious, the compounding stability of the carbide particles or polycrystalline diamond particles, the ...

Grating plate making process

A grating plate making process comprises the following steps: 1, providing a set of mould forming sub grid plates; 2, forming a first sub grid plate; 3, forming followed-up sub grid plates; 4, taking the followed-up sub grid plates with a longer length formed by the step 3 and a mold as the foundation; and 5, processing side edges. According to the grating plate making process, the sub grid plates are firstly formed, the sub grid plates are provided with buckle ends, and adjacent sub grid plates are melted for connection by the buckle ends, and the connection strength of the grating plates can be ensured. By division of a large grid plate into a plurality of the sub grid plates for independent mould unloading, mold requirements can be reduced, space is saved, production cost is saved, the enterprise profit space can be increased, and the enterprise competitiveness can be enhanced.

Method for self-trailing of mobile welding robot before welding

The invention discloses a method for self-trailing of a mobile welding robot before welding, comprising the following steps: a mobile welding robot moves ahead at the angle smaller than or equal to 180 degrees and searches a weld joint from the feature model of a welding groove; the gesture of the mobile welding robot body and the distortion characteristics on the welding groove are combined to obtain the initial digging angle of the mobile welding robot; when the initial digging angle is smaller, precise pose regulation based on the least square method is directly carried out; when the initial digging angle is bigger, position timing or through position timing is selectively carried out; then, precise pose regulation based on the least square method is carried out until the mobile welding robot body is parallel to the welding joint, and a welding gun is positioned on the welding joint center. The invention causes the welding gun and the welding joint to form closed loop and feedback relationship ...

Apparatus and method for calibration of laser triangulation system

Disclosed in the invention is an apparatus for calibration of a laser triangulation system. The apparatus comprises a rotating platform, a top pin and a calibration cylinder; the calibration cylinder is fixedly arranged above the rotating platform; and the top pin is compressed at the upper surface of the calibration cylinder. In addition, the invention also discloses a calibration method for using the calibration apparatus. The calibration cylinder with a slit and checkerboard calibration boards is used as a tool; and on the basis of six steps, a slit image, a calibration board image and a laser image are collected and calculated in real time and whether the system calibration meets the preset requirement is determined. And at last, an imaging plane of a camera is in parallel with a reference plane; and an intersecting line of the laser and the reference plane is intersected with and is perpendicular to an optical axis of a lens. The provided method is simple and effective and can be mastered ...

Geophysical exploration method and apparatus

Multi-photography synchronous spectrum collection system for measuring temperature and concentration of multi-component welding arc

The invention provides a multi-photography synchronous spectrum collection system for measuring temperature and concentration of a multi-component welding arc. The multi-photography synchronous spectrum collection system for measuring temperature and concentration of the multi-component welding arc comprises an arc output power supply, a plurality of high-speed photography systems, a synchronous triggering device, a collection board card and a computer, wherein the arc output power supply produces arc plasma, the multiple high-speed photography systems are arranged at the side of the arc plasma, are located at the same plane as the arc plasma, are matched with narrow-band optical filters of different elements to shoot arc images of different wave lengths, the synchronous triggering device controls the multiple high-speed photography systems to achieve synchronous photography and is connected to the computer through the collection board card, the collection board card collects image data ...

Electronic water scale cleaning device

The present invention refers to an electronic water scale cleaning device. The existing electronic water descaling device mostly applies a high-frequency or high-voltage electric field and an electrode insulating sleeve using water as capacity load, resulting in low transmission efficiency and complex production facilities. The present invention eliminates electrode insulating sleeve by placing electrode directly into water using water as resistance load and ultrasonic frequency circuit instead of high-frequency, high-voltage circuit featuring obvious descaling effect, simple structure, high reliability and reduced cost.

Device for treating water using electric field

数字信号处理器控制熔化极气体保护焊机的方法

... 数字信号处理器控制熔化极气体保护焊机的方法为数字信号处理器经程序编制输入后直接来控制与电源变压器输出端相连接可控硅整流电路和配置的送丝电路，稳定焊接参数的网压补偿经网压检测电路由数字信号处理器内的编程直接控制，焊接电弧电流和电弧电压反馈经数字信号处理器处理后按编程实时控制。本发明具有实质性特点和显著进步，焊接电源的控制集成度高，实现焊机的数字化控制。 ...

Digital flip flop of three phase full bridge controllable silicon welding power source main loop

A digital trigger for the main loop of three-phase full-bridge SCR power supply used for welding is composed of main circuit, trigger driver and synchronizer. Its main loop consists of synchronizer, synchronous transformer, resistors and voltage stabilizing diodes. The output voltage or current can be controlled in closed-loop mode. Its advantages are high real-time control accuracy, and high reliability, symmetricity and stability.

Laser range finding method of robot system for cutting and ruling profile steel

A method of laser spacing for formed steel robot cutting and marking system is to mount a sensor on the end axle of the robot arm and software makes program order according to work sequence to control the robot to move the laser shift sneos rvertical above the wing panel or web plane of the formed steel, the robot drives laser shift sensor along longitudinal, horizontal or angled direction of theformed steel, the computer gets the position coordinates of each detection point of the formed steel wing panel, length direction as that of formed steel width operation and execution primary coordinates for the robot marking and cutting.

Method for identifying deviation state of incident laser in online manner

The invention discloses a method for identifying a deviation state of incident laser in an online manner. The method is used for carbon dioxide laser welding on metal plates which are of sandwich structures. The method includes shooting light-induced plasma cloud images by the aid of a high-speed camera in welding procedures; computing feature parameters of the plasma cloud images; computing process statistic quantities of the feature parameters of the images in set time periods; determining comprehensive indexes by the aid of a principle component analysis process; judging a position deviation degree of the incident laser according to the comprehensive indexes. The method has the advantages that the position deviation state of the incident laser can be accurately and quickly judged in the dioxide laser welding procedures for the metal plates which are of the sandwich structures, devices are simple, interference on the laser welding procedures can be prevented, and the method can be widely ...

Manipulator clamping apparatus and tool exchanging equipment for cutting and ruling device

A manipulator fixture and tool exchange for the cutting and marking apparatus is composed of robot, the cable swinging unit of cutting torch and marking torch, base, terminal executor of robot, manipulator fixture, and job tool clamper. It is suitable for plasma cutting and marking on the steel for ship.

Watermelon hybrid seed production method

The invention relates to a watermelon hybrid seed production method which comprises the following steps: (1) seed production site and soil selection; (2) parent purification; (3) seed sowing; (4) culture management; (5) hybrid pollination; and (6) collection. According to the method, female parent castration, female flower double bagging and rear 5-6-section topping of female parent pollinated melons are performed in advance, thereby effectively preventing hybridization and enhancing the hybrid seed production purity and hybrid seed production efficiency.

Vertical shaft drilling and digging integrated construction platform device and method

The vertical shaft drilling and digging integrated construction platform device comprises a top beam, a middle platform and a lower platform, the top beam is fixedly installed above the middle platform, the lower platform is installed below the middle platform in an up-down moving mode through a telescopic device, a slag turning shovel is installed at the bottom of the middle platform, and the slag turning shovel downwards stretches out of the lower platform. A console is installed on the middle platform, a plurality of supporting devices are installed on the outer edge of the top beam and the outer edge of the middle platform respectively, and a ceiling protection device is installed above the top beam. According to the construction platform device, operators can be well protected according to difficult-to-predict sudden problems such as rockfall and rockburst, meanwhile, a corresponding construction platform can be provided for the operators according to the requirements of construction ...

Method for evaluating stability of lining tunnel bearing fluctuation load under action of asymmetric force

The invention relates to a method for evaluating the stability of a lining tunnel bearing fluctuating load under the action of asymmetric force, which comprises the following steps of: acquiring a bidirectional crustal stress state around the tunnel, and solving an asymmetric coefficient of stress; establishing an underground tunnel pressure-bearing model and carrying out stress analysis; setting a stress function under an asymmetric load condition, and solving to obtain elastic stress distribution; determining a function satisfied by the ultimate elastic principal stress of the first yield point of the tunnel, and solving to obtain the position of the first yield point and the stress state of the first yield point; deducing a stable condition of the tunnel structure under any stress action, determining a safe load space and constructing plastic stress distribution meeting the stable condition; and a self-balancing stress equation set of any load disturbance is established, the maximum ...

Method for measuring residual stress in substrate

The invention discloses a method for measuring the residual stress of a substrate, which comprises the following steps: determining the parameters of temperature difference, a coating to be measured and the substrate; calculating the distance delta between a bending moment axial line and the coating, the curvature K of the bending moment axial line and the substrate interface, and the strain component epsilon s of planar direction caused by the plane stress of the substrate; calculating the straining of the substrate according to the formula that epsilon s is equal to epsilon s+K(z+epsilon); and calculating the residual stress sigma s inside the substrate according to the formula that sigma s is equal to Es'epsilon s. The method not only can accurately measure the residual stress value inside the substrate of common multilayer coating, but also can accurately measure the residual stress value inside the substrate of the functional gradient coating according to the elastic mechanic principle ...

On-line detecting method for laser welding T-type overlap joint gaps based on spectrum analysis

The invention discloses an on-line detecting method for laser welding T-type overlap joint gaps based on spectrum analysis. According to the on-line detecting method, aiming at the phenomenon that in the laser welding process of a T-type overlap joint, because the gaps between an upper plate and a lower plate are prone to being caused by welding deformation, test piece machining accuracy and others, the welding process is unstable, and defects are caused, the fluctuation frequencies of spectral line intensity of 500 nm-600 nm plasma spectrums along with time in the welding process are detected in real time, and the peak frequencies of plasma signal intensity under different gaps are calculated by using Origin software, so that the quantitative relation between the gaps and the peak frequencies is obtained, the gaps are detected, related parameters of welding are adjusted in time, and the gaps and the defects can be avoided. According to the on-line detecting method, a detecting system is ...

Apparatus and method for measuring spline dimension of besides-star wheel

Disclosed in the utility model is a triangulation method-based apparatus for measuring a spline dimension of a besides-star wheel. The measuring apparatus comprises a laser, a camera, a lens, and a mechanical structure for fixing a tested workpiece. In addition, a method for measuring a spline dimension of a besides-star wheel is also disclosed. According to the method, laser is used as structured light; the CCD camera carries out shooting to obtain a spline profile; and the spline dimension is obtained by calibration and image processing and calculation. Therefore, non-contact measurement of a major diameter, a small diameter, a distance between two pins, and a division error of the spline of the besides-star wheel can be realized. On the basis of the design of the apparatus, definition and contrast of the profile image of the spline are enhanced; due to the structure of fixation of a rotating plate and a top pin with synchronous rotation of the besides-star wheel, the high dynamic precision ...

Sputtering coating ion beam irradiation reinforcing method

The invention discloses a method to enhance the sputtering coating ion beam irradiation in the membrane plating technical field. The method includes following steps: (1) a radio frequency coil internally arranged is placed in front of a base plate in a membrane plating chamber, so superimposed plasmas are produced near the base plate; (2) the external surface of the radio frequency coil is completely insulated; (3) radio frequency energy is input into the radio frequency coil to heat the coil, and then the coil is cooled down; (4) the power of the input radio frequency is adjusted, so as to control the ion beam density of the irradiation base plate and adjust the ion beam irradiation effect in the plating membrane. In the method of the invention, the ion beam of the irradiation base plateis not provided with a high-energy tail, the density and the energy of the ion beam can be adjusted independently, the radio frequency power can be as high as thousands of watts, and no pollution is caused ...

V-shaped plane-cross triplex folded resonant cavity for CO2 laser

Arc stricking method for metal gas arc welding

The method for striking the arc for metal gas arc welding belongs the field of welding technology, and includes the following steps: firstly, slow wire-feeding stage, its slow wire-feeding speed is 1/2-3/4 of normal set wire-feeding speed, when the end portion of welding wire is contacted with workpiece, stopping feeding wire; wire-feeding stopping stage; inertia of wire-feeding motor can continuously feed wire in a microsmall distance, producing reliable short circuit, when the welding power supply judges the arc is formed, instantly switching on wire-feeding drive circuit, feeding wire downwards in speed less than normal wire-feeding speed, after the arc is strived, making slow wire-feedins stage again, the time of said stage is controlled in 1-20 sm; after the arc is stabilized, the arc-striking operation is completed, starting normal wire-feeding speed.

Metal sputtering low-temperature preparation method for crystallization TiO2 film

The invention discloses a method for preparing crystal TiO2 film with metal sputtering low temperature in the coating technical field, which comprises following steps: firstly, separately supplying argon gas and oxygen, respectively forming a local rich argon gas zone on the target material surface or a local rich oxygen zone near a substrate, secondly, sputtering titanium atoms of a metal titanium target in a metal sputtering mode, thirdly, folding induced type coupling radio frequency plasmas whose concentration grade is more than 10<11>cm-3 near the substrate, fourthly, ionizing or decomposing oxygen modules which are in the rich oxygen zone near the substrate in the induced type coupling radio frequency plasmas, generating oxygen ions and oxygen atoms, fifthly, enabling the oxygen ions and the oxygen atoms which are ionized or decomposed in the induced type coupling radio frequency plasmas to reach the substrate when in coating, taking part in reaction, and sixthly irradiating ion beams ...

Welding power supply with 12-phase SCR

This invention relates to twelve-phase thyristor welding power source mainly including a main circuit transformer, two sets of three phase full control bridge rectifier circuit, a balancing reactor, a main circuit inductance and load connected in the following way: the primary of the main circuit transformer becomes a triangle and the secondary circuit is made up of two sets of three-phase full control bridge rectifier circuit in parallel with a balancing reactor in between to be connected with the main circuit inductance by the lead wire at the middle and a welding load is connected between the main circuit inductance and a common anode transistor group.

Watermelon hybrid seed production method

The invention relates to a watermelon hybrid seed production method which comprises the following steps: (1) seed production site and soil selection; (2) parent purification; (3) seed sowing; (4) culture management; (5) hybrid pollination; and (6) collection. According to the method, female parent castration, female flower double bagging, rear 5-6-section topping uniform female parent pollinated melons and the like are performed in advance, thereby effectively preventing hybridization and enhancing the hybrid seed production purity and hybrid seed production efficiency.

Method for compensation of equal section scale-checking of welding power source network voltage undoluation

This invention relates to welding power network voltage wave equal division section looking-up table compensation method. This invention waves the network voltage nominal value within -15%- +15%, equally divided into 16 or 32 section each corresponds to a mecessary corrected value of main loop power thysistor. When a digit signal processor gets a network voltage wave DC signal via A/D alternate it will look for a corresponding network voltage wave phase shift revised value via looking up table program, then operates on addition or deduction with the original designed phase shift value and theprocessed control signal directly drive welding main loop power thysistor via photoelectric separation.

Antiskid fastener for building

An antiskid fastener for building is composed of two subfasteners rivetted together. In each subfastener, the lower subfastener has a small end joined with swing screw bolt and a big end jointed to the upper subfastener which has notch and thrust surface. Said two subfacteners can be turned relatively to each other. Its advantages are simple structure, high tension strength and torsion rigidity, and high reliability.

焊接电源电网电压波动等分区间查表补偿方法

... 焊接电源电网电压波动等分区间查表补偿方法属于焊接技术领域。本发明将电网电压额定值波动在-15％-+15％范围内等分成16区间，或者等分成32区间，每一区间对应一个主回路功率可控硅的应需修正的值，当数字信号处理器经A/D转换获得电网电压波动直流信号，通过查表程序在其对应区间寻找一个对应的电网电压波动移相相位修正值，再与数字信号处理器原先软件设定的移相相位值进行加或减处理，处理后的控制信号经光电隔离直接驱动焊接主回路功率可控硅。本发明具有实质性特点和显著进步，本发明避免了复杂模拟器件构成的电网电压补偿电路，其控制电路非常简单，可靠性得到了很大提高，数字化的处理过程稳定，控制精度得到保证。 ...

Method for self-trailing of mobile welding robot before welding

The invention discloses a method for self-trailing of a mobile welding robot before welding, comprising the following steps: a mobile welding robot moves ahead at the angle smaller than or equal to 180 degrees and searches a weld joint from the feature model of a welding groove; the gesture of the mobile welding robot body and the distortion characteristics on the welding groove are combined to obtain the initial digging angle of the mobile welding robot; when the initial digging angle is smaller, precise pose regulation based on the least square method is directly carried out; when the initial digging angle is bigger, position timing or through position timing is selectively carried out; then, precise pose regulation based on the least square method is carried out until the mobile welding robot body is parallel to the welding joint, and a welding gun is positioned on the welding joint center. The invention causes the welding gun and the welding joint to form closed loop and feedback relationship ...

Power source for welding digital array transistor

Dynamic detecting equipment of pump internal axle axial fitting gap

POWER SUPPLY FOR HIGH SPEED NON-CONTACTOR ANTI-ELECTRIC SHOCK ALTERNATING ARC WELDER

... 在交流弧焊电源的电源变压器二端分别串接一对以反并联方式连接的可控硅－－－极管。它们的各一同极性端与电源变压器次级两端分别串接，另一端与电源输出端连接。电源变压器有两个抽头，抽出工业标准安全电压，分别触发两个可控硅。这种交流弧焊电源的始动时间快（＜０．０１秒），引弧可靠，容易，防电击动作可靠，寿命长。 ...

Electronic beam welder with separated wire-feeding chamber for low-vacuum wire feeding and its method

V-shaped planar-cross triplex folded resonant cavity for CO2 laser

The triplex folded resonant cavity includes four sections of discharge tube, three turning reflectors, one output window and one end reflector. The optial axes of the four sections of discharge tube are triplex V-shaped folded in the angle of 15-45 deg inside one same plane, and at each vertex of V-shaped folding angle, one turning reflector is installed. The present invention has less optical loss and raised beam quality compared with the background technology, and makes CO2 laser obtain maximum equivalent resonant cavity legnth or maximum laser output power in given space.

Measuring method for residual stress in coating

The invention discloses a method for measuring the residual stress inside the coating, which comprises the following steps: determining the parameters of temperature difference, a coating to be measured and a substrate; calculating the distance delta between a bending moment axial line and the coating, the curvature K of the bending moment axial line and the substrate interface, and the strain component epsilon i of plane direction caused by each layer of the plane stress of the coating; calculating the straining of each layer of the coating according to that epsilon i is equal to epsilon i+K(z+epsilon); and calculating the residual stress sigma i inside each layer of the coating according to that sigma i is equal to Ei'epsilon i. The method not only can accurately measure the residual stress value inside common multilayer coating, but also can accurately measure the residual stress value inside each layer of the functional gradient coating, and provide effective theoretical basis for the ...

Geophysical exploration method and apparatus

The invention discloses a geophysical exploration method and a device which are based on the close connection between the physical characteristics of the earth and geology, and determine the bottom interface depth of a detected object by means of standing wave, wherein, electromagnetic wave is received through an electric signal receiver and a magnetic signal receiver by means of the electromagnetic standing wave exploration equipment of the invention; the wave loop frequency of electromagnetic standing wave is determined by a data recording and processing device; finally, according to the known electromagnetic parameters input into the detected object, data result is calculated and output. The invention, which makes full use of natural energy resources, has economical efficiency and practicality, simple operation during measurement and low cost.

Digital driving circuit for main circuit of silicon controlled welding machine

Iron-based alloy powder for high strength and toughness laser deposited coating

The invention discloses iron-based alloy powder for a high strength and toughness laser deposited coating in the technical field of alloy materials. The iron-based alloy powder comprises the following components: 0.60 to 1.00 percent of C, 0.35 to 0.70 percent of Si, 0.30 to 0.60 percent of Mn, 5.00 to 7.00 percent of Cr, 2.50 to 4.00 percent of Ni, 1.50 to 2.50 percent of Mo, 1.00 to 1.50 percent of W, 0.70 to 1.00 percent of V, 0.20 to 0.40 percent of Ti, 0.50 to 0.70 percent of B, 0.20 to 0.40 percent of Nb, 0.10 to 0.30 percent of Ce and the balance of Fe. The iron-based laser deposited alloy coating without cracks in large area can be obtained without pre-heating and post thermal treatment, the deposited alloy coating has high hardness which reaches 62 to 67HRC, and the yield strength reaches 1,700 to 2,000MPa.

Iron-based alloy powder for high strength and toughness laser deposited coating

The invention discloses iron-based alloy powder for a high strength and toughness laser deposited coating in the technical field of alloy materials. The iron-based alloy powder comprises the following components: 0.60 to 1.00 percent of C, 0.35 to 0.70 percent of Si, 0.30 to 0.60 percent of Mn, 5.00 to 7.00 percent of Cr, 2.50 to 4.00 percent of Ni, 1.50 to 2.50 percent of Mo, 1.00 to 1.50 percent of W, 0.70 to 1.00 percent of V, 0.20 to 0.40 percent of Ti, 0.50 to 0.70 percent of B, 0.20 to 0.40 percent of Nb, 0.10 to 0.30 percent of Ce and the balance of Fe. The iron-based laser deposited alloy coating without cracks in large area can be obtained without pre-heating and post thermal treatment, the deposited alloy coating has high hardness which reaches 62 to 67HRC, and the yield strength reaches 1,700 to 2,000MPa.

Method for adjusting self-tracing pose of mobile welding robot

The invention relates to a method for adjusting the self-tracing pose of a mobile welding robot, which belongs to the technical field of automatic welding. The method comprises the following steps: getting the welding robot march toward the direction at an entrance angle of less than or equal to 90 degree, and searching a weld joint according to a characteristic model of a welding groove; according to the pose of the welding robot and the distortion characteristics of laser streaks projected on the groove, obtaining the initial entrance angle of the mobile welding robot; performing differential preadjustment to make the entrance angle of the mobile welding robot less than or equal to 20 degree; and applying a least square method to perform preweld self-tracing pose adjustment to position the mobile welding robot under the weld joint, wherein a bodywork of the mobile welding robot is parallel to the weld joint and a welding gun is positioned in the center of the weld joint. The method adopts ...