11results about How to "Maintain dimensional accuracy" patented technology

The invention relates to the technical field of household appliance shell injection molding production, in particular to a household appliance shell injection molding mold which comprises a cooling detection mechanism, the cooling detection mechanism comprises a semiconductor refrigeration plate used for cooling cooling water, and further comprises an upper mold body and a lower mold body used for injection molding, and refrigeration cavities are formed in the upper mold body and the lower mold body correspondingly. In the forming process, the ultrasonic transmitting plate can transmit ultrasonic waves to penetrate through raw materials, the ultrasonic receiving plate can receive reflected ultrasonic waves, the curing degree and the forming quality of the raw materials can be judged by analyzing the change of received ultrasonic wave energy, and then electric signals are transmitted into the PLC through the ultrasonic receiving plate. And then the PLC can adjust the power of the semiconductor refrigeration plate and the working state of the water suction pump in real time according to the ultrasonic energy change detected by the ultrasonic receiving plate, so that the temperature and the flow speed of the cooling water are dynamically adjusted.

The invention discloses a femtosecond laser strengthening method for improving the surface integrity of a laser cladding high-temperature alloy, and belongs to the technical field of laser cladding postprocessing, and the femtosecond laser strengthening method comprises the following steps: S1, selecting a proper high-temperature alloy as a base material, and cleaning and pretreating the surface of the base material; s2, a cladding laser is started to clad the base material; S3, a femtosecond laser system is set, and the optimal light beam quality and energy density are obtained; according to the method, the cladding surface is strengthened through femtosecond laser, the defects of cracks, air holes and the like appearing on the material surface after laser cladding are effectively removed, the surface integrity is greatly improved, premature failure caused by the problems of stress concentration and the like in the using process of components can be prevented through elimination of the surface defects, the service life of the components is prolonged, and the production cost is reduced. The safety and stability of the key hot end component are guaranteed, and the surface integrity of the high-temperature alloy component can improve the service performance and reliability under extreme loads such as high temperature, high flow speed and high pressure in the fields of aerospace and the like.

The invention discloses a ceramic thread tooth position machining method, and belongs to the technical field of ceramic thread tooth position machining. A carborundum cutter is adopted for cutting a ceramic workpiece, and the hardness of the carborundum cutter is far higher than that of a ceramic material, so that the long service life can be maintained when the hard and brittle ceramic material is cut; meanwhile, less heat is generated in the cutting process, the dimensional precision and the surface quality of the workpiece can be kept, the micro-emulsified cutting fluid is matched for use, the micro-emulsified cutting fluid has cleaning performance and transparency, the surface state of the workpiece can be observed easily, and the working efficiency is improved. The microemulsion cutting fluid overcomes the defects that a traditional cutting fluid is prone to deterioration and poor in cleaning performance and transparency and a fully-synthetic cutting fluid is poor in lubrication, and is high in permeability, so that the microemulsion cutting fluid fully infiltrates the wall of a threaded hole to be machined to form a certain permeable emulsion layer, ceramic fiber chippings are not prone to edge breakage, the machining requirements of high-hardness and high-strength hard and brittle materials are met, and the service life of the threaded hole to be machined is prolonged. And the qualification rate of ceramic products is ensured.

The sleeper beam assembling and welding production line comprises a welding robot, a welding head is mounted on a mechanical arm of the welding robot, and a mounting cylinder, a vibration column and a vibration mechanism used for driving the vibration column to vibrate are arranged on one side of the welding head; a switching head is rotationally mounted at one end of the vibration column, a vibration head and a flame spray gun are mounted on the switching head, a cooling channel is formed in one end of the vibration head, and a driving mechanism used for driving the switching head to turn over is arranged on the mounting cylinder; when welding stress relief operation is carried out, one driving mechanism drives the switching head on the driving mechanism to turn over until the vibration head on the driving mechanism is aligned with a welding seam on one side, and the other driving mechanism drives the switching head on the driving mechanism to turn over until the flame spray gun on the driving mechanism is aligned with the welding seam on the other side. The obvious temperature difference is formed on the welding seams on the two sides of the web welding part, the vibration energy is transmitted into the web welding part through the vibration head, the welding stress removing efficiency can be remarkably improved, the reliability of the welding seam area is improved, and welding deformation is restrained.

The invention discloses a high-quality oversized scene-penetrating roller shutter fabric and a manufacturing method thereof. The manufacturing method comprises the following steps: S1, warp yarns are 600D polyester composite yarns; the weft yarns are single 600D micro-net low-elasticity interlaced yarns; s2, weaving gray fabric according to a 1 / 1 plain weave structure; s3, performing pre-shaping treatment on the gray fabric; s4, performing cloth refining treatment on the grey cloth by using a specific cloth refining auxiliary agent formula and process parameters; s5, dyeing the grey cloth to obtain colored cloth; s6, the color cloth is subjected to tentering setting, and the set specification requirement is met; s7, performing blade coating, pre-drying, baking and cooling treatment on the front surface and the back surface of the fabric to obtain the scene-penetrating roller shutter fabric with zero appearance defect. According to the invention, through a plurality of fine process designs, from the aspects of yarn selection, weaving, pre-shaping, cloth refining, dyeing, re-shaping, slurry scraping treatment and the like, the problems of network lines, dot splitting, wrinkle marks, crack marks and the like in the prior art are systematically solved, and the high-quality oversized scene-penetrating roller shutter fabric is produced.

The flexible solar wing supporting and unloading device for the spacecraft is characterized in that a first supporting plate is arranged at the top of a first supporting framework, a first positioning hole is formed in the first supporting plate, a first limiting device is arranged on one side of the first supporting framework, and a first limiting plate of the first limiting device is arranged above the first supporting plate; a second supporting plate is arranged at the top of the second supporting framework, a second positioning hole is formed in the second supporting plate, the second limiting device is arranged on one side of the second supporting framework, and a second limiting plate of the second limiting device is arranged below the second supporting plate; the first supporting framework and the second supporting framework are connected through a connecting piece, and a gap exists between the first supporting framework and the second supporting framework which are connected. According to the invention, precision maintenance of composite substrates with different thicknesses in a horizontal unloading state and a narrow space stitching area and simultaneous tension loading of the two substrates are realized.

The invention discloses hot core sand mold forming equipment, and relates to the technical field of hot core sand mold forming, the hot core sand mold forming equipment comprises a base, the side wall of the top of the base is provided with a pair of first channels, the first channels are symmetrically arranged at the top of the base, and the inner side wall of the bottom of each first channel is slidably connected with a mold vertical plate; by arranging the mold vertical plate, the fixed mold base and the mold top plate, a formed sand core can be easily demolded, the situation that the sand core is damaged or a casting is deformed due to difficult demolding is reduced, the sand core is ensured to be complete, and therefore the shape and size precision of the casting is kept; the surface quality and the overall quality of the sand core are improved, abrasion of the mold can be increased in the difficult demolding process, the mold can be protected against unnecessary damage through easy demolding, the service life of the mold is prolonged, and therefore the production cost is reduced, meanwhile, production stagnation caused by difficult demolding is reduced, the production process is accelerated, and the production efficiency is improved. The overall production efficiency is improved.

The invention provides a PCTC floating and pier falling positioning device and a using method thereof, and relates to the technical field of shipbuilding, the positioning device comprises two positioning frames, the two positioning frames are installed on the same side of a dock platform, the two positioning frames are located at the bow position and the stern position of a parallel middle body of a ship body respectively, and the two positioning frames are installed on the same side of the dock platform. The positioning frame is fixedly installed on a dock bottom plate through fixing parts, a plurality of working platforms are arranged on the positioning frame, adjusting parts are installed on the working platforms and used for conducting pressure of the ship body, fender rubber is fixedly installed on the sides, away from the adjusting parts, of the working platforms, and the adjusting parts are used for adjusting the pressure of the ship body. A large number of stand columns do not need to be welded to the ship body for positioning work, under the action of the positioning frame and the mooring rope, the ship body is subjected to floating and pier falling positioning, the ship building efficiency is improved, the workload of workers is reduced, and resource waste is avoided.

The present application belongs to zinc-nickel alloy plating layer, and particularly relates to an alkaline stripping solution for removing unqualified zinc-nickel alloy plating layer, a preparation method and application thereof. In order to safely and efficiently remove unqualified zinc-nickel alloy plating layer, the present application provides an alkaline stripping solution, which is composed of the following components in terms of mass concentration: main salt: NaOH 100-180 g / L; oxidizing agent: sodium nitrate 180-200 g / L and NaClO 10-20 g / L; complexing agent: salicylaldehyde oxime 30-50 g / L and diethylene triamine 30-50 g / L; corrosion inhibitor: 2-acetylpyrrole or 4-piperidine carboxamide 2-10 g / L; wetting agent: sodium dodecyl sulfate 0.5-1.5 g / L. After the components in the alkaline stripping solution are mixed in proportion, the alkaline stripping solution can be directly used for removing unqualified zinc-nickel alloy plating layer, the stripping rate reaches 0.6-1 um / min, and the stripping temperature range is wide without damaging the substrate.

The invention discloses a heat treatment device for processing high-pressure seamless gas cylinders and a heat treatment method thereof, which relate to the technical field of heat treatment of high-pressure seamless gas cylinders, and comprise a base, a furnace body being installed on the top of the base, a furnace cover being rotatably installed on the end face of one side of the furnace body, a box body being embedded and installed on the end face of the other side of the furnace body, a sliding box being slidably installed inside the furnace body, a compression tube being installed on one side of the outer curved surface of the box body, and an exhaust pipe being installed on the middle part of the end face of one side of the box body. The invention can realize integrated heating and cooling of the gas cylinder, effectively avoid contact between the gas cylinder and the heat exchange medium, effectively avoid oxidation of the metal surface, avoid corrosion caused by the heat exchange medium, avoid heat exchange imbalance caused by temperature change of the heat exchange medium, can perform multiple recycling of energy in the heat treatment process, reduce energy consumption required in the heat treatment process of the gas cylinder, make the device more energy-saving and environmentally friendly, and make the heat treatment work more continuous, stable and efficient.

The invention discloses a stainless steel electric heating tube annealing method and annealing equipment, and belongs to the technical field of annealing. The annealing equipment comprises a workbench, a cooling tank is assembled on one side of the workbench, a cooling pipe is arranged at the bottom of the cooling tank, the two ends of the cooling pipe penetrate through the cooling tank and extend into the workbench, a refrigeration mechanism is assembled in the workbench, and the two ends of the cooling pipe are connected with the input end and the output end of the refrigeration mechanism respectively. The temperature of the cooling solution in the cooling tank for annealing and cooling can be controlled, and the cooling tank for adjusting the temperature can provide cooling media at different temperatures, so that the cooling rate can be accurately controlled according to the types of metals and the required final performance; and meanwhile, the metal pipe is cooled in the cooling tank, so that the metal pipe can be uniformly cooled on the whole section, internal stress and deformation caused by non-uniform cooling are reduced, and a certain gain is achieved for keeping the size precision and the structural integrity of the metal pipe.