40results about How to "Smooth welding surface" patented technology

The invention discloses a method for welding thin-wall micropipes of a fluoroplastic heat exchanger, which is characterized in that the fluoroplastic thin-wall micropipes are heated by metal bath as a heat carrier; a welding mold is placed in the metal bath; row tubes are placed in the welding mold to enable thermal expansion of a fluoroplastic end plate in the welding mold to be hindered in order to generate radial pressure; and the radial pressure is superposed with the pressure from the thermal expansion of an expansion core that is inserted in the fluorplastic heat exchanger, so that under molten state, the fluoroplastic end plate and the row tubes composed of the fluoroplastic thin-wall micropipes are molten together, and the welding purpose is achieved.

The invention discloses a tool for performing exposed type back wiring on a pipe body. The tool comprises a tool rack, a tool seat, a cutter and a roller, wherein the bottom of the tool seat is connected with the tool rack; a gap is formed in the top of the tool seat; the cutter is mounted on the tool seat, and is used for cutting an embedding slot for paving a resistance wire in the pipe body; the roller is positioned in the gap and can rotate, and the resistance wire is arranged on the outer circular face and is conveyed into the cut slot in the pipe body through rotation; the outer circular face of the roller presses the inner wall of the pipe body to embed the resistance wire on the outer circular face of the roller into the embedding slot of the pipe body. The tool for performing exposed type back wiring on the pipe body is stable in wire laying, controllable in precision and perfect in performance.

The invention provides fluoroplastic condenser welding equipment, comprising an outer shell, an infrared heater disposed at the inner side of the outer shell, a fan disposed at the upper part of the outer shell, a fixing mold disposed at the lower end of the outer shell, a tube plate disposed below the outer shell through the fixing mold, a tube bundle connected to the tube plate through the fixing mold and a temperature sensor connected to the fixing mold. The tube bundle is provided with a modified PTFE inner core. Besides, the invention also provides a process for welding by using the equipment. The fluoroplastic condenser welding equipment prepared by the welding process provided by the invention is expected to achieve the following technical indexes: (1) a welding depth is larger than 8 mm; a welding surface is flat; and the fluoroplastic condenser welding equipment has no bubble; (2) pressure tests after shaping show that the fluoroplastic condenser welding equipment has no bubble after being kept for 30 minutes at a temperature of 25 DEG C and gas tightness of 0.45 MPa; and hydrostatic test show that the fluoroplastic condenser welding equipment has no leakage after being kept for 30 minutes at a pressure of 0.6 MPa.

The invention discloses an electronic mounting lead-free soldering paste flux, with the components and weight contents: 45-65% of bonding-film forming agent, 0.2-15% of activator and surfactant, 1-10% of thixotropic sink-proof slipping agent, 0.5-10% of fitting additive, and the residual quantity of solvent. The preparation method of the flux is that the solvent and the bonding film-forming agentare arranged in a container which is provided with a dispersion device according to the dosage, are heated and continuously mixed till that the material is fully dissolved; after that, other materials are once added; the heating and mixing are continued till that all materials are dissolved into bright dilute viscous liquid, and then the heating and mixing are stopped; the mouth of the container is sealed, and the invention can be obtained after static arrangement. The SnAgCuBi and AnAgCu soldering paste which is made by the flux of the invention contains no halogens, requires no cleans, has good printing performance, does not stick plates, has no bypasses or topnotch and good forming of printing point, and has no edge collapse. By reflow soldering, the welding surface and the welding spot are bright and smooth without residue or solder beadings. All technical indexes of the flux and the soldering paste achieve the JIS-3197 standard.

The invention discloses a manufacturing process of a metal-plastic welded steel wire reinforced tracheal intubation tube. The manufacturing process is as follows: Step 1, cutting a semi-finished tube body; Step 2, passing a stainless steel wire spring to the semi-finished tube body Inside; step 3, set the welding parameters of the welding equipment, contact the welding conductive electrode with the ends of the stainless steel wire spring at both ends, and install the semi-finished pipe body equipped with the stainless steel wire spring in the pressing mold; step 4, start welding Equipment, first perform heating pre-welding, and then perform stable welding. After completion, turn off the welding equipment; step five, cooling: after the welding operation is completed, use compressed cold air to cool the semi-finished pipe body and the pressing mold; step six, welding quality inspection . Through the manufacturing process disclosed by the present invention, the stainless steel wire spring and the tube body of the trachea intubation can be quickly welded together, and the cost is significantly reduced compared with the traditional inner dipping process, and it has the advantages of high pass rate, low energy consumption, clean and environment-friendly.

The invention relates to a steel structure automatic assembly welding fixture, which comprises a welding frame, an alignment mechanism, a rolling leveling mechanism and an adjustment mechanism. The present invention can solve the following problems in the welding process of steel structures: a. In the traditional welding process, the clamping specifications for steel structures are fixed, and one type of clamp can only correspond to one type of steel structure. For steel structures of different specifications, fixtures need to be replaced frequently during the welding process, the process is cumbersome, and the production cost is high. bIn the traditional welding process, there may be problems such as incomplete alignment between weldments and uneven welding surfaces. It affects the use of the steel structure after welding. In the traditional welding process, the weldments are only close together. After the welding is completed, there may be problems such as the weld is easy to break, and the welding effect is not good.

The invention relates to a precision pulley bracket welding and assembling machine. The precision pulley bracket welding and assembling machine comprises a rack, a clamping workbench, a workbench driving assembly, a workpiece fixture assembly, an argon arc welding assembly and a polishing assembly. The rack comprises a feeding and discharging station, an argon arc welding station and a polishing station. The clamping workbench is arranged on the rack and makes contact with the feeding and discharging station, the argon arc welding station and the polishing station at the same time. The workbench driving assembly is arranged below the clamping workbench and drives the clamping workbench to rotate horizontally. The workpiece fixture assembly is arranged on the clamping workbench and used for installing and fixing a pulley shaft and a pulley bracket which need to be welded and assembled. The argon arc welding assembly is arranged in the argon arc welding station, and argon arc welding is conducted on the pulley shaft and the pulley bracket on the workpiece fixture assembly. The polishing assembly is arranged in the polishing station, and the welding position of the pulley shaft and the pulley bracket is polished. Compared with the prior art, the assembling process, the welding process and the polishing process can be effectively completed automatically, the production efficiency is high, and the surface quality is good.

The gas-shielded metal-type flux-cored welding wire for X100 pipeline steel disclosed in the present invention comprises a flux core and a welding skin, wherein the flux core is composed of the following components by mass percentage: C≤0.08%, Si: 0.10-0.30%, Mn: 0.5 ‑1.5%, P≤0.003%, S≤0.003%, Ni: 3.5‑5.0%, Cr: 0.05‑0.10%, Cu≤0.02%, Nb≤0.02%, V: 0.005‑0.01%, Ti: 0.01‑0.08 %, Al: 0.05-0.08%, B: 0.010-0.020%, and the rest are Fe, and the sum of the mass percentages of the above components is 100%. It can be used for welding X100 pipeline steel. The metal type flux-cored welding wire is welded under gas protection, with good arc stability, less spatter, and the joint performance meets the standard requirements. Also provided is a preparation method of the welding wire.

The invention relates to an aluminum part internal channel brazing method and belongs to the technical field of metal machining. The aluminum part internal channel brazing method comprises the steps that firstly, aluminum parts and composite brazing filler metal are machined and cleaned, so that the welding surfaces of the aluminum parts are flat, oxide layers and dirt of the aluminum parts and the composite brazing filler metal are removed so that good connection between the aluminum parts subjected to brazing can be guaranteed, and then the sealing performance of internal channels in the aluminum parts is ensured; next, the aluminum parts and the composite brazing filler metal are assembled, fixed and placed into a vacuum brazing furnace, the temperature is raised to the melting point of the composite brazing filler metal by means of controlling the temperature of the vacuum brazing furnace and detecting the temperature of the aluminum parts through a workpiece coupler, and then brazing is completed. Meanwhile, by the adoption of the aluminum part internal channel brazing method, the machining process is simple, the cost is low, and the application range is rather wide.

The present invention discloses a welding method for substrate and membrane of membrane mobile polymer microfluidic chip, which relates to the manufacturing technology of membrane mobile polymer microfluidic chip and comprises the following steps: before the welding, the substrate is fixed, the surface of the substrate is covered with the membrane; the membrane is pressed against the surface of the substrate, and in the course of welding, the laser irradiates the welding area on the substrate through the membrane, and the welding area fuses and then welds the substrate and membrane together. The present invention realizes the firm welding between membrane and substrate of membrane mobile polymer microfluidic chip, and ensures that the weld face is flat and uniform.

The sintered welding flux with high alkalinity, low activity and ultralow hydrogen content consists of MgO 28-33 wt%, CaF2 12-20 wt%, Al2O3 16-22 wt%, SiO2 8-15 wt%, CaCO3 5-10 wt%, BaCO3 5-10 wt%, Na2O 2-4 wt%, Li2CO31-4 wt% and ReF 2-6 wt%. It has high grain strength, moisture absorbing resistance and S and P content meeting the requirement of relevant national standard, diffusion hydrogen content lower than 5 ml / 100 g. It is fitted with 10NiCrMoTi welding wire and 05Ni3Mn2MoTi welding wire for low temperature no-preheating welding in ship yard and can result in excellent joint mechanical performance. It has excellent technological performance, smooth weld seam, good spreading, smooth transition to the base material and good slag eliminating performance.