31results about How to "Eliminate surface stress" patented technology

The invention discloses a wood drying process. The wood drying process comprises the steps of 1, preheating; 2, high-temperature and high-humidity treatment; 3, drying; 4, maintenance. When the wood drying process is adopted for drying wood, the surface stress and internal stress of wood can be eliminated, surface cracking or internal cracking of wood can be prevented, the original quality of wood is maintained, defects such as air shrinkage, bending, crinkling and deformation do not occur easily, the rate of wood damage caused by improper drying is reduced greatly, and meanwhile, energy is saved and drying time is shortened.

The invention discloses a machining method for a spherical surface roller pin free of edge angles. The method includes the following steps of A roll polishing, B heat treating and C modified line machining and further includes the following step of edge angle removal machining, wherein after roll polishing in the step A, an arc lantern-shaped rolling barrel is manufactured according to the size and the shape of a roller pin, the rolling barrel is horizontally arranged on a support with an adjustable dip angle, the roller pin after roll polishing is thrown into a barrel body of the rolling barrel through a throwing opening, the two ends of a roller pin blank make contact with the barrel wall in the barrel body, the rolling barrel rotates in the circumferential direction around the axis of the barrel body through an external power source, and in the rotating process, the roller pin blank is grinded in a 360-degree rolling-polishing mode along the barrel wall in the barrel body, so that the edge angles at the two ends of the roller pin are machined to be arc angles. The method solves the problem that the edge angles exist in the connecting positions of the two ends of the outer side wall and the semicircular ends of the roller pin, and the roughness of the semicircular ends at the two ends of the roller pin is small.

The invention provides an EBSD sample making method. The method includes: sample making, wherein a preset-size test is made from sample raw-material, and a to-be-tested surface of the test sample is polished; and heat processing, wherein the test sample after sample making completion is placed in vacuum airtight equipment capable of temperature control, heat processing is carried out according topreset technology, and the sample is used for an EBSD test after heat processing completion. Through the method, a sample making process and time can be shortened, sample making costs can be reduced,sample making efficiency can be improved, calibration rates of IPF graphs in EBSD tests can be significantly improved at the same time, and a highest calibration rate can reach 99%.

The invention belongs to the technical field of car parts and relates to a preparation method of a car door handle. The preparation method comprises the following steps that (1) a PC and ABS compositeis injected into a mould cavity so that a car door handle blank is obtained; (2) the car door handle blank is arranged in a bisphenol A type epoxy resin solution and then taken out to be put in a plasma reaction device and vacuumized, gas is supplied into the plasma reaction device, and surface modification treatment is carried out so that a surface modified blank is obtained; and (3) the surfacemodified blank is subjected to primary electronickelling, baking, then secondary electronickelling and drying, so that the car door handle is obtained.

The invention relates to a polishing process for a back plate in a target material assembly. The polishing process comprises the steps that first mechanical polishing and second mechanical polishing are sequentially conducted on the target material back plate, wherein an abrasive belt used in first mechanical polishing is a 600 # non-woven fabric ring belt; and an abrasive belt used in second mechanical polishing is a 240 # non-woven fabric ring belt. According to the polishing process for the back plate in the target material assembly provided by the invention, through the design of the polishing process, different abrasive belts and specific polishing sequences are adopted to remove surface dirt, and meanwhile, the service life of the back plate is prolonged.

The invention provides a method for reducing stress of tempered glass and a method for recycling defective products of glass and relates to the field of production of touch screens. The method for reducing stress of tempered glass comprises the following steps: (A), preheating: preheating lithium silicate tempered glass for 2-5 hours at 290-350 DEG C; (B) ion exchange: placing the preheated tempered glass in mixed fused salt of sodium nitrate and lithium nitrate and carrying out ion exchange for 10-120 minutes at 382-450 DEG C, wherein the weight percentage of sodium nitrate in the mixed fusedsalt is 71-79%; the weight percentage of lithium nitrate in the mixed fused salt is 21-29%. The method for reducing the stress of the tempered glass can be used for relieving the problem that a technology for eliminating the stress of the lithium nitrate tempered glass is lacked in the prior art; the purpose of reducing or eliminating the stress of the lithium nitrate tempered glass is achieved.

The invention discloses a production method and a product of an oblong flat-wire stainless steel profiled bar. The production method comprises the following steps of 1), first-time coarse drawing; 2), second-time coarse drawing; 3), immersion lubrication; 4), the preparation of an oblong flat-wire hole die; and 5), fine drawing: making one end of a bus of which the immersion lubrication procedure is completed penetrate into a concave die, starting a wire drawing machine to carry out a fine-drawing forming procedure, so as to make and obtain the oblong stainless steel profiled bar. The production method provided by the invention is succinct in procedures and high in efficiency; the surface defect of the bus is hereby removed first through the first-time coarse drawing; afterwards, the surface stress of the bus is hereby relieved again through the second-time coarse drawing; the surface texture of the bus is guaranteed to be stable without rupturing during the fine drawing; subsequently, the bus is immersed in a lubricant, so that a protective layer is formed on the surface of the bus and the bus plays a lubrication role between the bus and the die during the fine drawing; the friction is prevented from causing a scratch; finally, through the fine drawing, the oblong stainless steel profiled bar is made and obtained; the quality of the product is effectively guaranteed; and the improvement of the competitive power of an enterprise is facilitated.

The invention provides a heat treatment process for electric power steel, which includes the following steps: (1) raising the temperature of the annealing furnace, and after the temperature of the annealing zone of the annealing furnace rises to 690-730°C, injecting DX gas into the annealing furnace; ( 2) Put the power steel to be processed on the conveyor belt of the annealing furnace for heat treatment; (3) Pass saturated steam into the bluening zone of the annealing furnace to blueize the iron core that enters the bluening zone after heating treatment; ( 4) After the iron core is blued, it is quenched and cooled. During the quenching and cooling process, an appropriate amount of methanol or kerosene should always be dripped into the furnace to prevent oxidative decarburization; (5) After quenching, low-temperature tempering deal with. The steel material after the heat treatment of the invention has high strength, high yield strength, low crack sensitivity, good corrosion resistance, good toughness, and can recover naturally after bending under force.

The invention discloses a production method for a hexagonal stainless steel profiled bar and a product thereof. The production method comprises the following steps that (1), first roughing extracting is conducted; (2), second roughing extracting is conducted; (3), soaking and lubricating are conducted; (4), an hexagonal eye model is prepared; and (5), fine extracting is conducted, specifically, one end of a soaked and lubricated busbar is penetrated into a concave die, a wire drawing machine is started to conduct the fine extracting forming working procedure, and the hexagonal stainless steel profiled bar is prepared. The production method is concise in working procedure and high in efficiency. Firstly, through first roughing extracting, the surface defect of the busbar is removed; then, through second roughing extracting, and the surface stress of the busbar is eliminated, so that it is guaranteed that the surface structure of the busbar is stable and does not fracture; the busbar is soaked into a lubricating agent to form a protective layer on the surface of the busbar, the lubricating effect is achieved between the die and the busbar when fine extracting machining is conducted, so that scratching caused by friction is avoided; and finally, through fine extracting, the hexagonal stainless steel profiled bar is prepared, the quality of the product is effectively guaranteed, and the production method is favorable for improving enterprise competitiveness.

The invention relates to a processing process and a coating device for a colored steel strip. The processing process for the colored steel strip comprises the following steps: continuously obtaining ato-be-processed steel strip; cleaning surface dirt of the to-be-processed steel strip in a hot water dirt-removal process; blowing gas to the steel strip with surface dirt cleaned in a gas-blowing process; heating and drying the cooled steel strip in a heating drying process; coating paint on at least one surface of the dried steel strip in a paint coating process; and drying and curing the painton the steel strip in a baking process; cooling the steel strip with paint dried in a cooling rolling process, and rolling and retracting the cooled steels trip. The gas-blowing process can be introduced to reduce the temperature of the steel strip, so that surface stress of the steel strip is favorably eliminated; and gas is adhered on the surface of the steel strip, so that oxygen content of the steel strip surface is favorably reduced, and therefore, the steel strip is not liable to oxidize in a follow-up heating drying process, and performance of the steel strip is improved.

A method for preparing a thermoplastic soft polyvinyl chloride adhesive tape, at least including a preparation process for instant quenching and hardening to shape and a preparation process for using a pressurized air-dispelling coiler to wind up a finished polyvinyl chloride soft adhesive tape; wherein, the instant The purpose of the hardening and shaping preparation process is to keep the surface quality of the PVC soft adhesive tape free of flow marks and the haze is consistent, and the purpose of using the pressurized air-driven coiler is to ensure that the PVC The surface of the soft adhesive tape is flat and free of bubbles and dents. Even if the PVC soft adhesive tape is rolled and stored, the upper surface and the lower bottom surface in the rolled state are in contact for a long time, and the light fog on the upper surface and the lower bottom surface The degree is still consistent, and it is suitable for making a double-sided high-gloss polyvinyl chloride soft adhesive tape without flow marks.

The invention relates to a method for improving the surface quality of a plastic metal electron back scattering diffraction sample. The method comprises the following steps of sample preparation, grinding, mechanical polishing, electrolytic polishing and ion etching. The method has the advantages that residual traces of sample preparation on the surface of the sample can be eliminated due to polishing treatment; mechanical polishing treatment can further eliminate abrasive paper polishing residual scratches on the surface; the stress layer on the surface of the sample can be removed through electrolytic polishing and ion etching treatment, so that the characterization quality of electron backscatter diffraction is improved, the surface quality of the sample is improved, the surface stresslayer is reduced, the dissolvable rate of the sample is improved, and an electron backscatter diffraction result with higher quality is obtained.

The invention discloses a production method for a U-shaped stainless steel profiled bar and a product of the production method. The production method includes the following steps that firstly, the first time of rough drawing is conducted; secondly, the second time of rough drawing is conducted; thirdly, soaking and lubricating are conducted; fourthly, a U-shaped eye die is prepared; and fifthly, precise drawing is conducted, wherein one end of a busbar obtained after the soaking and lubricating process penetrates into the U-shaped die, a wire drawing machine is started for conducting the precise drawing forming process, and the U-shaped stainless steel profiled bar is prepared. The processes of the production method are simple, and efficiency is high; surface defects of the busbar are removed through the first time of rough drawing so that the surface of the busbar can be smooth preliminarily; then surface stress of the busbar is eliminated through the second time of rough drawing so that it is ensured that the surface organization of the busbar is stable and does not crack during precise drawing; then the busbar is soaked into a lubricating agent so that a protection layer can be formed on the surface of the busbar, a lubricating effect is achieved between the busbar and the die when the busbar is subjected to precise drawing machining, and scratches caused by friction are avoided; and finally, the stainless steel profiled bar is prepared through precise drawing, the quality product is effectively ensured, and the enterprise competitiveness is better improved.