42results about How to "No quality defects" patented technology

The invention relates to a method for preparing graphene-reinforcing copper-based composite brazing filler metal, in particular to a method for efficiently preparing the graphene-reinforcing copper-based composite brazing filler metal at a low temperature. The method aims to solve the problems that during preparation of the graphene-reinforcing copper-based composite brazing filler metal through a traditional method, the dispersibility of graphene is poor, the number of surface defects is large, the preparation temperature is high, and efficiency is low. The method comprises the steps that firstly, copper powder is placed in a plasma-reinforcing chemical vapor deposition vacuum device, hydrogen is fed into the vacuum device, and the temperature is maintained at a high temperature; secondly, argon and carbon source gas are fed into the vacuum device for deposition, and after deposition is over, feeding of the carbon source gas is stopped; finally, cooling is conducted until the temperature reaches the room temperature, so that grapheme/copper composite powder is obtained, next, metal powder or alloy power is evenly mixed with the grapheme/copper composite powder, and then the graphene-reinforcing copper-based composite brazing filler metal is obtained. The method is used for efficiently preparing the graphene-reinforcing copper-based composite brazing filler metal at a low temperature.

The invention discloses a gradually-moulding bent tempered glass radian-changing device, which includes a plurality of supporting beams which are extended longitudinally and arranged transversally at intervals. A plurality of support roll wheels are arranged on the supporting beams longitudinally at intervals. The two ends of each supporting beam are respectively connected to two transversally radian-changing mechanisms through a universal spherical pair. The two transversally radian-changing mechanisms can change the radian according to the radian-changing positions respectively. By means of the device, glass can be discharged and bent at the same time, so that it is unnecessary to wait the glass to be discharged completely, thereby saving production time. When a long bent tempered glass needs to process, the device can avoid the quality defect due to different temperature at the head and the tail of the glass during bending. By means of independent control on the transversally radian-changing mechanisms, special-shaped glass of which the radian is not constant can be processed on the device.

A provided blast-furnace casting runner comprises a runner body for enabling blast furnace melted iron to flow past, prefabricated slag skimmers detachably embedded in two runner edges of the runner, a slag removing channel communicated with the runner body, and an residual iron discharging taphole communicated with the runner body; an iron passing channel is formed between the bottom surfaces of the prefabricated slag skimmers and the bottom surface of the runner body; the communication opening between the slag removing channel and the runner body is at the runner edge which blast furnace molten iron flows past preceding to the prefabricated slag skimmers; and the communication opening between the residual iron discharging taphole and the runner body is at the lowest position of the bottom of the runner body. The provided blast-furnace casting runner possesses the detachable slag skimmers, and the slag skimmer is not easy to crack and convenient for changing; and additionally, the provided blast-furnace casting runner possesses the improved residual iron discharging taphole, and the improved residual iron discharging taphole helps to avoid taphole enlargement or taphole shape destroying when the residual iron discharging taphole is gotten through.

The invention discloses a novel manufacturing method of a large-diameter inclined tee joint. The novel manufacturing method comprises the following specific steps of A, manufacturing forming of an inclined tee joint pipe fitting, B, positioning welding of the inclined tee joint pipe fitting, C, preheating of an inclined tee joint fitting tee joint inclined branch pipe and a tee joint straight main pipe, D, joint first layer welding of the inclined tee joint fitting tee joint inclined branch pipe and the tee joint straight main pipe, E, joint bottoming welding of the inclined tee joint fitting tee joint inclined branch pipe and the tee joint straight main pipe, F, joint secondary preheating of the inclined tee joint fitting tee joint inclined branch pipe and the tee joint straight main pipe, G, joint welding of the inclined tee joint fitting tee joint inclined branch pipe and the tee joint straight main pipe, H, inclined tee joint fitting low-temperature protecting, and I, inclined tee joint fitting heat treatment. The novel manufacturing method of the large-diameter inclined tee joint is simple in manufacturing process, low in cost and capable of solving the quality flaw problem probably existing in the large-diameter inclined tee joint.

The invention relates to the technical field of vending equipment, and discloses self-service freshly squeezed edible oil vending equipment. The self-service freshly squeezed edible oil vending equipment includes a material conveying channel, an oil squeezing machine, a cup dropping device and a cup sealing device, wherein the material conveying channel is used for conveying oil squeezing raw materials, and the oil squeezing machine adopts the oil squeezing raw materials to squeeze oil; the material conveying channel is provided with a material inlet for the oil squeezing raw materials to enter and a material outlet, the oil squeezing machine is provided with an oil squeezing inlet and an edible oil outlet, the oil squeezing raw materials enter the oil squeezing machine through the oil squeezing inlet to be subjected to oil squeezing, and edible oil obtained after squeezing is discharged through the edible oil outlet; the material outlet of the material conveying channel is communicated with the oil squeezing inlet of the oil squeezing machine, a cup dropped from the cup dropping device contains the edible oil discharged through the edible oil outlet, and the cup sealing device isused for sealing the opening of the cup. The self-service freshly squeezed edible oil vending equipment can be directly placed in communities or public places, the edible oil obtained after squeezingcan be directly eaten, no long production period is needed, no other substances need to be added into the edible oil, the edible quality of the edible oil is ensured, and no quality defects exist.

The invention discloses a cold-rolled silicon steel thin strip continuous annealing production line deviation rectifying device and method. The device comprises a control system and a plurality of deviation rectifying units. Each deviation rectifying unit comprises a detection mechanism used for detecting the current deviation amount of strip steel at the position, a deviation rectifying roller located below the strip steel and used for applying deviation rectifying force to the strip steel, and a swing mechanism capable of driving the deviation rectifying roller to swing leftwards and rightwards relative to the strip steel on the horizontal plane. The most downstream deviation rectifying unit further comprises clamping rollers distributed on the working side and the transmission side above the strip steel and pressing mechanisms capable of driving the clamping rollers in one-to-one correspondence to press the strip steel downwards, the pressing mechanisms can be driven by the swing mechanism to swing synchronously with the deviation rectifying rollers, and the clamping rollers are parallel to the deviation rectifying rollers. The control system is connected with all the detectionmechanisms, the swing mechanisms and the pressing mechanisms and used for controlling the swing direction and angle of the deviation rectifying rollers and the pressing force of the clamping rollers according to the current deviation amount. According to the cold-rolled silicon steel thin strip continuous annealing production line deviation rectifying device and method, continuous deviation rectification can be achieved, the deviation rectification range is large, the retentivity is good, and no quality defect is generated for a continuously-operating cold-rolled silicon steel thin strip.

The invention belongs to the technical field of building materials and building construction and particularly relates to a fabricated concrete variable-section end-column-type shear wall member and amanufacturing mould and construction method thereof. The fabricated concrete variable-section end-column-type shear wall member comprises a shear wall limb (11) and an end column (12), and the end column (12) is directly connected with one side end of the shear wall limb (11). Through the variable section, steel bar joints (1F) of vertical steel bars (101) on the two sides of the lower section (1B) of the member and edge member vertical steel bars (1041) are exposed. The problem of unstable connection between the vertical steel bars (101) and the edge member vertical steel bars (1041) of the end-column-type shear wall member is conveniently solved through a welding connecting method. Through an overall prefabricated mode, the problem of connection of horizontal steel bars (102) and the problem that various steel bars cannot be mutually connected to form a steel bar framework are solved. By forming a shear wall limb vertical hole channel (112) and an end column vertical hole channel (122) which are special for cast-in-place concrete (32), the cast-in-place concrete (32) is easy to pour, vibrate and compact, the quality defect is avoided, and detection and acceptance are facilitated.By arranging an L-shaped connecting beam support (105) or a connecting beam support platform (106), connecting beams or frame beams are conveniently mounted.

The invention discloses a method for repairing cracks of a circular saw blade through welding, and particularly provides a manual arc welding process method capable of repairing crack defects of the circular saw blade at a lower preheating temperature. The method is characterized in that a welding material is a flat welding electrode capable of realizing narrow-direction strip conveying method welding and wide-direction strip conveying method welding; narrow and small grooves are welded; weld joint stress is eliminated through vibration impact; a bottoming weld joint and a filling weld joint are welded through a narrow-direction strip conveying method, and a cap weld joint is welded through a wide-direction strip conveying method; and the preheating temperature of the circular saw blade is 100 DEG C, and the welding repair temperature is kept at 80-100 DEG C. According to the method, the problem that the welding preheating temperature is too high is effectively solved, meanwhile, the welding operation is as simple, convenient and feasible as common welding, effective welding repair of the cracks on the circular saw web can be achieved, and the method has very high practical value and economic benefits.

A parallel type synchronous tamping technology for thickener of an aluminum cell lining comprises the following steps that firstly, a thickener tamping area of the cell lining is divided into a cell peripheral thickener tamping area and a cathode carbon block gap thickener tamping area which are two parallel tamping areas; secondly, the two parallel tamping areas are divided into a plurality of fixed tamping working planes according to working area dividing lines, and the tamping work is conducted in each working plane at the same time; thirdly, split tamping is needed in the cell periphery thickener tamping area, and when a combined tamping head conducts compression joint on every two adjacent tamping areas, the requirement for the compression joint width of an overlapping area of every two adjacent tamping areas in the cell peripheral thickener tamping area needs to be met; fourthly, at the tamping joint part of the cell peripheral thickener tamping area and the cathode carbon block gap thickener tamping area, the crossed lap joint tamping is conducted in the manner that the respective tamping ranges of the cell peripheral thickener tamping area and the cathode carbon block gap thickener tamping area need to be exceeded by a certain width; and fifthly, at the joint position of every two adjacent tamping working areas, tamped according to working areas, in the groove periphery thickener tamping area, the tamping width of the mutual crossed lap joint needs to meet the tamping requirement. According to the technology, the tamping quality is guaranteed, and the construction progress is improved.

The invention discloses a method and a device for improving internal stress distribution of strip steel. The method includes the following steps that a reverse bending roller having the preset rollerdiameter is arranged in the strip steel uncoiling position of a unit uncoiling machine, and the strip steel is bent reversely in the uncoiling position by the aid of the reverse bending roller; the position of the reverse bending roller is adjusted, the strip steel produces a preset wrap angle on the reverse bending roller, the strip steel is bent sufficiently reversely by the aid of the roller diameter of the reverse bending roller, and the irregular original internal stress of the strip steel is converted into the regular internal stress in the double-broken-line distribution form; a straightening machine is arranged behind a turning roller, repeated forward and reverse bending is performed on the strip steel by the aid of the straightening machine, the internal stress in double-broken-line distribution is converted into the internal stress in multiple-broken-line distribution, and thus homogenization treatment is performed on the unified internal stress distribution; and uncoiling production is performed on a cold-rolled or hot-rolled strip steel coil. By the aid of the method and the device, the effect of improving the internal stress distribution of the strip steel is achieved, and multiple quality defects caused by internal stress release can be avoided during subsequent processing.

The invention discloses a method for improving the yield of sintered square frame through hole type magnetic cores. The method comprises the following steps of: tidily stacking crude blanks of flat plate type magnetic cores to be sintered on a zirconium sheet used for loading, wherein the material of the crude blanks of the flat plate type magnetic cores is the same as that of the crude blanks of the square frame through hole type magnetic cores to be sintered; tidily stacking the crude blanks of the square frame through hole type magnetic cores to be sintered on the crude blanks of the flat plate type magnetic cores to be sintered; sending the stacked crude blanks of the square frame through hole type magnetic cores and the crude blanks of the flat plate type magnetic cores into a sintering furnace through the zirconium sheet for loading to sinter the crude blanks; and collecting the sintered square frame through hole type magnetic cores and the sintered flat plate type magnetic cores respectively. The method has the advantages that: a quality defect caused by uneven shrinkage caused by friction is not generated at a contact face of the sintered square frame through hole type magnetic cores, because the crude blanks of the flat plate type magnetic cores are placed on the crude blanks of the flat plate type magnetic cores which are made of the same material as the flat plate type magnetic cores to be sintered together, and the principle that the shrinkage rate is the same is adopted.