110results about How to "Improve welding pass rate" patented technology

The invention discloses a laser soldering method, comprising the following steps: (1) a semiconductor laser radiates a PCB pad with set energy so that the surface of the PCB pad reaches certain preheating temperature; (2) solder wires are fed to the surface of the PCB pad by a wire feeding mechanism on condition of certain feeding parameters; (3) under the action of laser radiation, the solder wires are molten and the molten tin spreads and moistens over the surface of the PCB pad; (4) the solder wires are withdrawn and removed from the pad; (5) the semiconductor laser continues radiating the pad so that the solder wires spread over the surface of the pad fully; and (6) the laser is closed and the tin is naturally cooled to form soldering points. During the use of the method, laser is used as soldering heat source, solder wires which are used as brazing filler metal are conveyed by wire feeder, and soldering connection is realized through the action of radiation of the laser to the tin wires and the PCB pad. Due to the characteristics of local heating, rapid heating, rapid cooling and the like during soldering, the method can effectively reduce heat loss of elements and greatly enhance the qualified rate of soldering.

The invention relates to a four-way diverter valve used on a heat pump air-conditioner, belonging to the technical field of refrigerating accessories, which is aimed to solve the defects in prior products, such as comparatively great heat loss due to the manufacturing materials. The invention comprises a main valve, a guide valve and a coil; wherein, a capillary tube is connected between the main valve and the guide valve, a through hole is arranged on the main valve body, and a connection tube is connected at the through hole; the main valve body is made of stainless steel materials, the connection tube is a combined tube with an inner layer and an outer layer; the outer layer is made of stainless steel and the inner layer is made of copper. One end of the connection tube is folded outward into a hem fitted with the external surface of the main valve body, and the flanged hem is welded on the external surface of the main valve body corresponding to the periphery of the through hole. The invention has the advantages that: the diverter valve can be used in heat pump air conditioning system to change the flow direction of refrigerating working medium, and is favorable to reducing the heat dissipation loss of the four-way diverter valve in the heat pump air conditioners.

The invention relates to a thermocouple welding clamping device. The thermocouple welding clamping device consists of a base 1, a supporting seat 3, a support 10, a thermocouple clamping component and a carbon rod clamping component, wherein the support 10 is vertically fixed on the base 1 through the supporting seat 3, the supporting seat 3 is fixed on the base 1 through screws 2, the thermocouple clamping component is connected with the base 1, the carbon rod clamping component is vertically and movably connected with the support 10, and the carbon rod clamping component can move on the support 10 so as to adjust the contact distance between the carbon rod 11 on the carbon rod clamping component and a thermocouple welding surface. The problems that the thermocouple welding quality is controlled by human factors, the quality is uncontrollable, the qualified rate is low and the like in the prior art are solved.

The invention discloses a light source component, which comprises a substrate body and an LED chip, wherein an electrode surface of the LED chip faces the substrate body and comprises an N electrode and a P electrode; a plurality of mounting blocks for arranging the LED chip in a welding manner are formed on the substrate body; each mounting block is a mounting boss which protrudes above a board of the substrate body; a heat-conducting insulating layer covers the substrate body and the surfaces of the mounting blocks; each mounting boss is partitioned into a negative electrode area and a positive electrode area through an isolation groove; a negative electrode lead and a positive electrode lead are printed on the heat-conducting insulating layer; the LED chip is provided with an insulatingwall between the N electrode and the P electrode; and the lower end surface of the insulating wall is laminated with the upper surface of the heat-conducting insulating layer in the isolation grooves. According to the light source component, the welding yield of the LED chip in a relatively small GAP can be ensured, the heat dissipation capability of the component is improved, the stability of the welding process of the LED chip is improved, a short-circuit failure risk caused by mutual overflow infiltration of solder is avoided and the mass production requirements of a high-brightness and high-heat-dissipation light-emitting component can be met.

The invention relates to a surface-mounted microwave circulator. The surface-mounted microwave circulator comprises a shell and a cover plate on the shell. The shell is of a semi-open cylindrical cavity structure, the side wall of the shell is provided with three openings, a gasket, a lower ferrite, a center conductor, an upper ferrite, a uniform-magnetism conducting plate, a permanent magnet and a temperature compensation plate are sequentially placed in the semi-open cylindrical cavity of the shell, the center conductor penetrates through the openings in the side wall of the shell to stretch out of the cavity, and columnar connectors are welded to the ends of the center conductor to form columnar connector ports. Through the design and welding installation of the center conductor and the columnar connectors, the flatness of the columnar connectors and the flatness of the bottom of the circulator can be automatically regulated. The single-magnet magnetic circuit structure design is adopted in the permanent magnet of the circulator. On the basis that the performance of a device is not changed by the packaging structure, the reliability of the microwave circulator is obviously improved, and the welding percent of pass is obviously increased. The circulator has the advantages of being small in size, good in performance, large in power handling, wide in temperature range and the like.

The present invention relates to a method for avoiding solder bridging. A plurality of insulation strips are respectively placed among a plurality of component holes of printed circuit board to be welded for insulating the adjacent component hole. Then welding is executed so that the component pins placed in the component hole are respectively combined fixedly with the printed circuit board through tin liquor, wherein the tin liquor is obstructed by the insulating strip. Thereby the improper solder bridging of two adjacent welding points on the component pins and component holes with small distance. Furthermore the welding pass rate can be increased and the maintenance cost of product in future is reduced.

The invention relates to an in-situ monitoring device and method for pollution of a protective lens for a welding laser head. The in-situ monitoring device comprises the protective lens, a monitoringassembly, a data analysis assembly and an executing terminal; the monitoring assembly is used for monitoring the pollution situation of a laser transmission area on the protective lens; the data analysis assembly is used for calculating the polluted area of the laser transmission area on the protective lens in real time, and the polluted area is compared with a preset threshold value; and when thepolluted area calculated by the data analysis assembly is larger than the preset threshold value, the executing terminal executes a welding interrupt instruction, and the welding laser head stops welding. The welding process of continuous welding defects caused by serious pollution of the protective lens can be stopped in time, subsequent defect elimination and welding continuing are convenient,the obsolescence risk of weldments is lowered to the utmost extent, and the welding pass percentage is further increased.

The invention belongs to the technical field of heat-resisting steel welding, particularly relates to a repairing method of a high-chromium martensite heat-resisting steel casting, and provides a welding and repairing method of a novel heat-resisting steel casting. The method comprises the main steps of defect treatment before welding, welding preheating, welding, heating after welding, and heat treatment after welding. By the adoption of the welding and repairing method, generation of weld cracks is reduced, the yield of welding and repairing is increased, the number of times of welding is reduced, and the repairing cost is reduced substantially.

The invention belongs to the technical field of welding, and relates to an automatic welding method for aluminum alloy thin plates. The automatic welding method comprises the steps of pre-welding preparation for equidistant cutting of the aluminum alloy thin plates, pre-treatment of a groove at the butt joint of the aluminum alloy thin plates, uniform clamping of a hydraulic clamping tool for thealuminum alloy thin plates, welding of the aluminum alloy thin plates after being clamped by the automatic welding method and post-welding shaping of small-scale flame repairing. The problems that inthe prior art, relatively large residual stress is prone to being generated when MIG is adopted to weld the aluminum alloy thin plates, large deformation of the base metal is generated after the completion of the welding, and subsequent shaping can be used for fine-tuning but the result is still not satisfactory are solved.

A parallelism-adaptive press head of diffusion weld is composed of base, lower press rod with flat lower end, lower press head, upper press rod with flat lower end, upper press head, steel ball arranged between base and lower press rod, and ceramic ball arranged between upper press head and upper press rod. Its adaptive regulation method is also disclosed.

The invention discloses automatic armature sheet welding equipment which comprises an automatic welding mechanism. The automatic welding mechanism comprises a positioning assembly, a rotary pressing assembly and a welding assembly; the welding assembly is arranged at one end of the positioning assembly; the rotary pressing assembly is arranged on one side of the positioning assembly; the positioning assembly comprises a positioning seat, a bearing seat installed on the positioning seat, and a welding supporting seat rotatably installed on the bearing seat; a limiting column is arranged on the welding supporting seat; a clamping groove is formed in the limiting column; the rotary pressing assembly comprises a servo motor capable of sliding and a rotary pressing block fixedly installed on an output shaft of the servo motor; the rotary pressing block is arranged over the welding supporting seat; the lower surface of the rotary pressing block is provided with a limiting groove matched with the limiting column; a clamping block matched with the clamping groove is arranged in the limiting groove; the welding assembly comprises a welding gun; and the welding gun is arranged right opposite to the welding supporting seat. The automatic armature sheet welding equipment provided by the invention can prevent an armature sheet from sliding, so that the welding qualification rate is increased.

The invention discloses an electric wire tube welding operation platform and belongs to the field of electric installation tools. The electric wire tube welding operation platform comprises an operation platform frame body, wherein wire tube fixing and adjusting devices are symmetrically arranged on four edges of the operation platform frame body; auxiliary graduated rules symmetric along the center of a platform surface are arranged on the platform surface of the operation platform frame body; transverse graduated rules are arranged at the front parts of the wire tube fixing and adjusting devices and perpendicular to the auxiliary graduated rules; a 10X10mm reserved hole is formed in the center of the platform surface of the operation platform frame body; and a wiring box fixer is arranged on the reserved hole. The electric wire tube welding operation platform has the characteristics of being low in cost, easy for manufacturing and convenient to carry; a crossover ground wire between a welded steel tube and a wiring box can be prefabricated in a material processing region; the positioning is quick and accurate; and the welding qualification rate is high.

The invention discloses a method for repairing a ship cylinder end through TIG welding. The method comprises the following steps that (1) a welding material is manufactured according to one of following methods, specifically, a body piston ring corresponding to a welded workpiece is selected and cut into small pieces as required to be used as the welding material after being degreased through a metal cleaning agent, or a casting iron welding rod CHC408 is selected, a coating is removed, and a flux core is used as the welding material; (2) the surface of the welded workpiece is treated, specifically, a to-be-repaired welded workpiece is detected, a welding repair position is determined, the welded workpiece is subjected to ultrasonic cleaning, the to-be-welded position is cleaned through grinding, new parent metal is exposed, and welding repair is instantly conducted after drying; and (3) welding repair is conducted, specifically, a TIG direct current welding method is selected, argon shielded welding parallel welding is adopted, and leftward welding is conducted. Through the method, welding is easy, the welding yield is high, fusion degree is high, the reuse rate of the cylinder end can be increased, and capital and time for recast are reduced.

The invention relates to an automatic welding method for a small-diameter thin-wall multi-layer pipe, which adopts automatic suspended arc welding (i.e. inert-gas arc welding). The automatic welding method comprises the following steps: by using pure tungsten or activated tungsten as an electrode, carrying out arc welding under the protection of inert gas; generating an arc between the end part of the tungsten electrode and a welded base material so as to carry out welding; and introducing argon gas for protection into the cavities of parts in the welding process, wherein the effective welding thickness is 0.7-1.1 millimeters; the effective welding length is 12-14 millimeters; the welding quality of the whole process can be ensured by dividing the whole welding process and adjusting the relevant parameter value of each section; the welding parameters are as follows: a positive rotation mode is adopted; the striking current is 9-11A, and the arc extinguishing current is 5-7A; the climbing time is 0.4-0.6 second, and the descending time is 2-3 seconds; and the welding process is divided into five sections. The invention has the following advantages: the automatic suspended arc welding is used instead of manual brazing; the X-ray inspection after welding shows that the welding qualified rate of pipe assemblies is increased to 90%; and the product quality is stabilized, the production cycle is shortened, and the processing cost is lowered.

The invention, which belongs to the technical field of laser welding, relates to a corrosion-resistant metal membrane assembly and a laser welding method thereof. The corrosion-resistant metal membrane assembly comprises an isolation membrane, a gasket and a body. The gasket is fixed on the body; and the isolation membrane is arranged on the gasket. The isolation membrane assembly is formed by theisolation membrane, the gasket and the body based on steps of gasket clamping, gasket inner diameter laser welding, laser welding of the gasket outer diameter, shaping processing of a welding joint on the gasket surface, isolation membrane clamping, and isolation membrane laser welding and the like. According to the invention, With the isolation membrane and the gasket made of the corrosion-resistant materials, the problem of the high cost of the corrosion-resistant material of the body is solved based on the integrated welding structure of the gasket and the body and thus the material cost is lowered; the laser welding is used for replacing the electronic beam welding, so that the device investment is reduced, the manufacturing difficulty and the manufacturing cost are reduced, and the production efficiency is improved; and the part welding qualification rate is increased, the product characteristics can be improved, and the long-term stability and reliability of the product are enhanced.

The invention relates to a surface-mounted microwave circulator with novel port structure, wherein, a shell is of semi-open cylindrical cavity structure; the side wall of the shell is provided with three port slot holes; bosses are respectively arranged on the positions on the side wall of the shell, corresponding to the three port slot holes; the semi-open cylindrical cavity of the shell is internally provided with a permanent magnet, a uniform magnetic conducting strip, a ferrite, a central conductor and a temperature compensation strip; the top of the shell is covered with a cover board; the central conductor extends out of the cavity through the port slot holes on the side wall of the shell; the three bosses on the side wall of the shell are provided with through holes, and each through hole is provided with a port pin insulator; each port pin insulator is provided with a port pin; and the three port pins are electrically connected with the central conductor. The package structure obviously improves the reliability of the microwave circulator and obviously enhances the welding qualification rate without changing the performances of the circulator. The surface-mounted microwave circulator has the advantages of small volume, excellent performances, high power handling, wide temperature range and the like, thus being applicable to large-scale production.

The invention provides a preheating device for TBM tool apron welding. The device comprises a working platform, a feeding assembly, a cantilever adjusting mechanism and a control cabinet, the feedingassembly is arranged on the working platform, and the switching of a workpiece between a welding position and a preheating position is achieved through the feeding assembly; one end of the cantileveradjusting mechanism is movably provided with an induction heating coil used for preheating the workpiece, and the other end of the cantilever adjusting mechanism is movably arranged on the control cabinet. A moving assembly is arranged on the bottom surface of the control cabinet to move the control cabinet. According to the preheating device, the effective connection of preheating, welding and post-heating procedures is guaranteed, the carrying work of workpiece at the high temperature is omitted, and the production efficiency and the welding quality of a TBM tool apron are improved. The invention further provides a method for preheating by using the preheating device, and the labor intensity of personnel can be effectively reduced.