256 results about "Puddle" patented technology

An electric arc welding apparatus for depositing molten metal from an advancing welding wire into a weld puddle in an open root between two juxtapositioned plates where the root extends in a welding path and is formed by converging walls terminating in generally parallel walls spaced to define a gap, which apparatus comprises a contact holder with a wire outlet, a switching power supply directing welding current to the wire as the wire passes from the outlet toward the open root, with the advancing wire defining an electrode stick out between the contact holder and the weld puddle, a circuit for sensing the length of the stick out, and control means for adjusting the welding current as a function of the sensed stick out length.

A real-time virtual reality welding system including a programmable processor-based subsystem, a spatial tracker operatively connected to the programmable processor-based subsystem, at least one mock welding tool capable of being spatially tracked by the spatial tracker, and at least one display device operatively connected to the programmable processor-based subsystem. The system is capable of simulating, in virtual reality space, a weld puddle having real-time molten metal fluidity and heat dissipation characteristics. The system is further capable of importing data into the virtual reality welding system and analyzing the data to characterize a student welder's progress and to provide training.

A real-time virtual reality welding system including a programmable processor- based subsystem, a spatial tracker operatively connected to the programmable processor- based subsystem, at least one mock welding tool capable of being spatially tracked by the spatial tracker, and at least one display device operatively connected to the programmable processor-based subsystem. The system is capable of simulating, in virtual reality space, a weld puddle having real-time molten metal fluidity and heat dissipation characteristics. The system is further capable of displaying the simulated weld puddle on the display device in real-time.

A hot wire welding process. An induction coil is used to preheat the filler metal wire prior to its entering the welding puddle/arc region. An induction coil is placed in close proximity to the welding arc. The filler wire is guided and supported by a delivery guide so that the filler wire passes through the center of, and is insulated from, the induction coil. The induction coil induces a current flow in the filler wire. The current produces heat as a result of the electrical resistivity of the filler wire. The heat produced raises the temperature of the filler wire just before it is fed into the weld arc region, thus reducing the energy required from the welding arc to melt the filler metal wire into the weld puddle.

After the rinsing processing is completed, the rotation speed of the substrate is reduced from 600 rpm to 10 rpm to form a puddle-like DIW liquid film. After the supply of DIW is stopped, the control unit waits for a predetermined time (0.5 seconds) so that the film thickness t1 of the puddle-like liquid film becomes approximately uniform. Then, IPA is discharged to a central part of the surface of the substrate at a flow rate of 100 (mL/min) for instance. By the supply of IPA, DIW is replaced with IPA at the central part of the surface of the substrate to form a replaced region. Further, after three seconds of IPA supply, the rotation speed of the substrate is accelerated from 10 rpm to 300 rpm. This causes the replaced region to expand in a radial direction of the substrate so that the entire surface of the substrate is replaced with the low surface-tension solvent.

A copper base alloy, which possesses high-strength, high conductivity, oxidation resistance and contains silver of low content, is characterized in that said high-strength high-conductivity oxidation-resistance low-silver copper base alloy is composed of low-silver copper base alloy powder, diamond powder of 0.2-1.0% and graphitized nanometer carbon fibre and is prepared through a powder metallurgy technological process, wherein said low-silver copper base alloy powder contains Ag of 0.08 -0.12%, Y, La and Ce of 0.05 -0.5% or one of misch metal or mixture of several misch metal. Said alloy in accordance with the present invention possesses higher intensity and hardness, stronger anti-crackle forming and stomatic expandability, and exhibits definite puddle welding resistance and better electroconductive performances at the same time.

The invention relates to a plasma-side-suction negative pressure device for laser welding. The plasma-side-suction negative pressure device can be mounted on any laser welding gun head. A negative pressure chamber device is fixed with the laser welding gun head and can move relative to a workpiece to be welded; and the negative pressure chamber device is arranged above a welding puddle area on the surface of the workpiece to be welded and is used for quickly exhausting, so that local negative pressure lower than the normal atmospheric pressure is generated in a closed chamber fixed in the laser welding gun head, and a negative pressure environment can be formed around a welding puddle. With the adoption of the plasma-side-suction negative pressure device for laser welding, the plasma generation during the process of high-power laser deep penetration welding can be effectively inhibited, and the weld-seam deep-layer air holes caused by a keyhole effect are eliminated. The plasma-side-suction negative pressure device for laser welding has the advantages of no restriction of workpiece size, flexibility and convenience in use, good stability, higher welding quality and increased stability in a welding process.

A welding system and method provide for generating a controlled waveform for welding power output, the waveform comprising a plurality of successive peak phases followed by a short circuit between a welding wire electrode and an advancing weld puddle. Each then present peak phase is regulated based upon at least the immediately preceding short circuit to control the short circuit that will occur following the then present peak phase. Some embodiments permit regulating at least one waveform phase based upon at least the immediately preceding short circuit to control the next short circuit that will occur, and regulating at least one short response phase based upon at least the immediately preceding short circuit to control the next short circuit that will occur.

The invention discloses a method for controlling water of a seedbed of cured tobacco seedlings by floating cultivation, relating to soilless and waterless seedlings culture of crops. The method comprises two steps of: reconstruction of a nutrition pool: removing an earth stripe at one end of a conversional nutrition pool, digging a puddle for storing nutrient fluid, sequentially arranging two columns of bamboo splints in the nutrition pool, and placing a floating plate overhead after the nutrient fluid is discharged so as to form an air layer between the bottom of the floating plate and the liquid level; and water control of cured tobacco seedlings by dry-wet alternation and discontinuous water supply: moving the nutrient fluid in due time according to the water requirement pattern of thecured tobacco seedlings so as to ensure water for the growth of the cured tobacco seedlings. The method has the advantages that: (1) the water supply time and the supplying water are based on the water requirement pattern of the cured tobacco seedlings in growing so as to be beneficial to promoting the growth of the seedlings and improving the quality of the cured tobacco seedlings; (2) the nutrient fluid is reused, the utilization ratio of water and nutrients is greatly improved, and the collected nutrients can also be used for other plants so as to reduce pollution to the environment; and (3) the plate airing process caused by overmuch water in a floating cultivation substrate during latter hardening off is reduced, the labor intensity is lowered and the manpower is saved.

The invention provides a large tank singe-face-weld double-face-forming method, which comprises arranging a weld joint forming pad on the back face of a weld joint of a weld part, wherein the weld joint forming pad is provided with a weld joint forming groove with the shape matched with that of the weld joint; fixedly and tightly attaching the weld joint forming pad on the back face of the weld joint to enable the center of the weld joint to align at the center of the weld joint forming groove; welding the front face of the weld joint; using large weld current for weld penetration of a weld part at one step; and enabling a weld puddle to be cooled and solidified on the weld joint forming groove. Compared with a traditional double-face-weld method, the weld joint is formed by one step, weld quality is better, production efficiency is improved, and production cost is reduced.

The embodiment of the invention, which relates to the technical field of the vehicle, provides a terminal device carried at vehicle, a vehicle, a prompting method of a puddle pavement, so that the potential safety hazard that a vehicle is trapped in or submerged in a puddle can be effective reduced or eliminated. The terminal device comprises: a storage unit, which is used for storing cartographic information and vehicle information of a vehicle itself; a sensor, which is arranged in front of the vehicle and is used for detecting a pavement condition of the vehicle driving path, particularly for detecting reflected wave information of the pavement ahead of the vehicle driving path, and sending the reflected wave information to a control unit; and the control unit, which is used for carrying out information processing including controlling of the storage unit and the sensor. The control unit determines whether a puddle exists at the pavement ahead according to the cartographic information, the vehicle information, and the pavement reflected wave information detected by the sensor and obtains maximum depth information of the puddle, thereby warning and reminding the driver. The provided terminal device can be applied to a vehicle.

The invention relates to a cladding and corrosion control method for a margin plate at the bottom of a vertical storage tank. A cladding area covers the part 200mm above the bottom of the vertical storage tank, the part extending from a T-shaped joint of the margin plate at the bottom of the vertical storage tank to the edge of the margin plate, an asphaltic sand protective layer with a width of 100mm, and the part where a concrete base extends outward by 200mm. The cladding area sequentially comprises an anticorrosion paste layer (3), an anticorrosion puddle layer (6), an anticorrosion belt layer (2), polyester fiber cloth (7), an elastic macromolecule anticorrosion layer (9) and a weather-proof surface coating (8) from inside to outside; the polyester fiber cloth (7), the anticorrosion belt layer (2), the anticorrosion puddle layer (6) and the anticorrosion paste layer (3) on the inner layer are all isolated and sealed in an inner wall space formed by the elastic macromolecule anticorrosion layer (9) through the elastic macromolecule anticorrosion layer (9), so that a multi-layer cladding anticorrosion structure with a certain plastic deformation function is formed.

The invention discloses a bi-component bi-sphenol A-type epoxy resin clay for sealing in the construction, which is formed through mixing and modulating A-component and B-component at the allocated proportion of 1:0.8-1.2 according to the weight. The content of the components of A-component according to weight is as follows: bi-sphenol A-type epoxy resin 80-120, active dilution plasticizer 10-30, talcum powder 160-180; the content of the components of B-component according to weight is as follows: active dilution plasticizer 25-35, alicyclic amine firming agent 40-50, talcum powder 205-215. The preparation method comprises the preparation of both A-component and B-component, and then A-component and B-component are prepared through being agitated by the three roller machine or mixed by the direct manual. The invention has the advantages of low cost and easy operation. The raw materials of the A-component and B-component are put into the three roller machine for agitating for 8-10 min, or by the manual. The working period is long, the solidification is quick, the toughness is high, and the invention allows solidification under the moist environment.