64results about How to "Dimensionally stable" patented technology

The intelligent quick-dry fabric comprises a fabric body, the fabric body comprises a yarn A and a yarn B, the yarn A is the yarn with the moisture absorption deformation characteristic, and the yarn B is the yarn with the deformation amount smaller than or equal to 5% after moisture absorption; the fabric body comprises a plurality of basic circulation unit structures, in one basic circulation unit structure, yarn A is woven to form a complete A coil row, the A coil row comprises A coils, yarn Bm and yarn Bm + n are interwoven around the yarn A, the yarn Bm is woven to form a Bm coil row, the Bm coil row comprises Bm coils, the yarn Bm + n is woven to form a yarn Bm + n coil row, and the yarn Bm + n is woven to form a yarn Bm + n coil row. The yarn Bm + n coil courses comprise yarn Bm + n coils, n-1 coil courses are arranged between the Bm coil courses and the Bm + n coil courses, and the Bm coil courses and the Bm + n coil courses are mutually strung and looped on at least one coil wale. The air permeability is improved by means of moisture absorption change, and the quick-drying effect is achieved.

This utility model relates to an ultra-thin rolled copper stamped fuse assembly. The fuse assembly includes a sheet copper substrate made of rolled copper with a thickness in the micrometer range, a first PI thermosetting film and a second PI thermosetting film respectively covering the upper and lower surfaces of the sheet copper substrate; the sheet copper substrate has a wavy fuse portion with a line width of 0.15±0.02mm. This utility model uses a high-precision die-cutting method to punch the ultra-thin rolled copper foil, directly forming a fuse semi-finished product. In particular, the extremely fine fuse portion is punched in one step, avoiding defects such as edge deformation caused by multiple punchings, ensuring stable dimensions and performance of the fuse portion. High-speed rotary die-cutting is then used for efficient and precise production, encapsulating the fuse portion within the film material, exposing the opening area and end area for electrical connection, improving production efficiency and subsequent use efficiency. The overall production efficiency can be increased to 5000pcs / H, and the yield rate to approximately 95%.

The utility model relates to a kind of wool knitted fabric, including the fabric body that warp fiber bundle warp is formed, and the fabric body is formed by multiple rows of fiber bundle arranged along front-back direction, wherein the adjacent three fiber bundles of front-back direction are a fiber bundle group, all fiber bundles are arranged to form multiple the fiber bundle group sequentially arranged along front-back direction, and the three fiber bundles of each fiber bundle group are wool fiber bundle, synthetic fiber bundle and antistatic fiber bundle respectively.The utility model solves the technical problem that the overall thickness of the fabric is relatively thick due to the stability and antistatic property of the fabric being improved by laminar compounding of the existing fabric.

The invention discloses a tempered glass cover one-time forming manufacturing method which comprises the following steps: melting raw materials for producing glass into glass feed liquid through a glass melting furnace, shearing the glass feed liquid into glass feed liquid with corresponding weight through a servo shear according to the size of a glass cover, feeding the glass feed liquid into a pressing machine through a glass feed channel, and performing one-time pressing to obtain a required glass cover prototype; the concave surface is polished with natural gas to be smooth; a reverse manipulator is used for taking the glass cover prototype subjected to fire polishing from the pressing machine mold to a cup supporting mold, and after a laser machine is used for drilling holes, natural gas is used for fire polishing of a convex surface to enable the surface to be smooth; feeding the glass cover prototype into a tempering fan for tempering molding; and S4, cooling after molding and tempering, and inlaying a steel ring to obtain a finished product. A glass cover prototype can be rapidly produced, a tempered glass cover is processed through a fire polishing tempering process, the finished product quality is good, the raw material utilization rate is greatly improved, the energy consumption is reduced, the cost is greatly reduced, the production efficiency is improved, different specifications can be produced according to needs, and the size is stable.

The invention belongs to the technical field of brazing, and particularly discloses a vacuum brazing method for chromium-zirconium-copper and stainless steel, a brazing joint and application, and the method comprises the following steps: cutting chromium-zirconium-copper and stainless steel base materials into round bars: preparing a Ni coating on the surface of the stainless steel after the stainless steel base material is pretreated; the Ag15CuP brazing filler metal is preset on a to-be-welded interface and placed in a vacuum brazing furnace, vacuumizing and heating are conducted, and then the Ag15CuP brazing filler metal is cooled to the room temperature; and low-temperature stress relief annealing is conducted on a brazed finished product, and furnace cooling is conducted to the room temperature. According to the vacuum brazing method for the chromium-zirconium-copper and the stainless steel, the brazing joint and the application, the novel silver-saving brazing filler metal Ag15CuP is selected as the brazing filler metal, efficient and reliable connection of the chromium-zirconium-copper and the stainless steel is achieved through the synergistic process scheme of stainless steel surface nickel plating modification, gradient temperature control vacuum brazing and low-temperature annealing, and the service life of the chromium-zirconium-copper and the stainless steel is prolonged. The obtained brazed joint is excellent in high-temperature and low-temperature cycle resistance, and can meet the service requirements of key components such as an airspace engine combustion chamber and a heat exchanger.

The application provides a combined bottom plate structure of a laser, which is a multi-layer plate integrated structure fixedly connected to the bottom of the inner cavity of the laser, comprising a support plate, a semiconductor refrigerator, a heat insulation pad, a base plate and a mounting plate; the bottom surface of the support plate is fixedly connected to the bottom of the inner cavity of the laser shell; the semiconductor refrigerator and the heat insulation pad form a first square body structure, the bottom surface of the first square body structure is connected to the top surface of the support plate; the mounting plate and the base plate form a second square body structure; the bottom surface of the second square body structure is connected to the top surface of the first square body structure, and the top surface of the second square body structure is an optical platform for bearing a plurality of optical components and absorbing heat. The application also provides a heat dissipation method for the combined bottom plate structure of the laser. The application solves the technical problem that the bottom plate structure of the existing laser cannot simultaneously meet the requirements of high-efficiency heat dissipation, accurate temperature control and stable structure due to the single material.

The application discloses a short-process preparation method of SMA spring and application thereof, and relates to the field of fluid control.The method comprises the following steps: 1) installing an SMA alloy wire reel on a spring machine; 2) starting the spring machine, conveying the SMA alloy wire to a preheating area for preheating, and conveying the preheated SMA alloy wire to a spring winding processing area; and 3) winding and forming the SMA spring according to preset length and shape under the condition that the winding and forming temperature is Af+120 DEG C to Af+240 DEG C.The application adopts a hot winding mode, directly winds and forms the SMA spring under the condition that the winding and forming temperature is Af+120 DEG C to Af+240 DEG C, the spring is stable in size, does not need secondary shaping treatment, the manufacturing efficiency is remarkably improved, and the production cost is effectively reduced.

The application relates to the field of wind power blades, and discloses a wind power blade manhole plate and manhole cover plate as well as a preparation method and application thereof. The method comprises the following steps: (1) mixing unsaturated polyester resin, a thickening agent, an initiator, a crosslinking agent, a low shrinkage agent, a release agent, a polymerization inhibitor, an inorganic filler and waste glass fibers, and then filling the mixture into a mold for preheating; (2) performing mold pressing on the preheated material to obtain a preformed material; and (3) performing heat treatment on the preformed material, and then performing demolding to obtain the wind power blade manhole plate and manhole cover plate. The method is prepared by creatively adopting a mold pressing forming method, and waste glass fibers are used as raw materials for preparation, so that the preparation cost is saved, and the preparation efficiency is improved.

The present application relates to the technical fields of air filtration material and nanocomposite material, and discloses a PVA / chitosan nanofiber air filter element prepared by electrospinning and a preparation method thereof.The filter element comprises an electrospun nanofiber felt, which is composed of a PVA matrix and chitosan nanofibril (CSF) dispersed in the PVA matrix, and the mass ratio of CSF to PVA is 0.5wt% to 10wt%.The present application introduces positively charged rigid CSF, which not only gives the filter element a particle removal efficiency as high as 97% and an extremely low pressure drop, but more importantly, CSF effectively improves the structural stability of the hydrophilic PVA matrix in a high humidity environment as a rigid skeleton, effectively solves the pain point of the traditional filter element that is easy to collapse after absorbing water, and can be quickly biodegraded in the natural environment after being discarded, and has environmental protection and commercial application value.

The invention discloses a liquid cooling driving pump body investment casting process which comprises the following steps: firstly, according to the size and the shape of a pump body, manufacturing a mold with a cavity consistent with the pump body and a loose piece for forming a complex inner cavity structure of the pump body, then injecting wax, molding a wax mold in the mold cavity by adopting a one-time mold splitting molding process, according to the pump body complex inner cavity wax mold, loose pieces are mutually positioned, combined and formed, then wax injection mold splitting is carried out to obtain a wax body, the wax body is connected to a mold head through a pouring gate system to form a tree group, then shell making and dewaxing are carried out on the tree group to form a mold shell, and then roasting, smelting pouring and post-treatment are carried out on the mold shell to form a casting. And the casting is further machined through overhauling, heat treatment, shaping and finish machining, and finally the qualified pump body is obtained if the casting is detected to be correct. Through one-time mold splitting of the wax piece with the complex structure in the inner cavity of the pump body, the mold splitting efficiency is improved, the cost is reduced, meanwhile, the pump body casting is corrected by adopting a one-time composite sizing mold after being subjected to smelting pouring, orderly cooling solidification and heat treatment, and the leakage risk of the pump body casting is greatly reduced.

This invention discloses a composite deformation heat treatment process for improving the strength and corrosion resistance of aluminum-lithium alloys, belonging to the field of aluminum-lithium alloy preparation technology. The composite deformation heat treatment process for improving the strength and corrosion resistance of aluminum-lithium alloys of this invention includes the following steps: (1) performing solution treatment, water quenching, and natural aging treatment on the aluminum-lithium alloy in sequence; (2) performing pre-deformation treatment on the aluminum-lithium alloy treated in step (1); (3) performing non-isothermal aging treatment on the aluminum-lithium alloy treated in step (3); wherein, the pre-deformation amount of the pre-deformation treatment is 4~10%; the non-isothermal aging treatment is to first raise the temperature from 40℃ to 140~200℃ and then lower the temperature to 100~160℃; the aluminum-lithium alloy treated by the composite deformation heat treatment process of this invention has both good mechanical properties and corrosion resistance.

The present application belongs to the field of wool fabric finishing, and provides a wool top raw fabric and a preparation method thereof. The present application forms wool fibers with controlled scale reduction and a keratin grafting layer by low-damage scale cutting of a hydrogen peroxide aqueous solution and sodium bicarbonate, removal of residual peroxide, and hydrolysis of keratin under the participation of carbodiimide hydrochloride and N-hydroxysuccinimide, and then the wool fibers are subjected to top preparation, spinning and weaving to obtain the fabric. The fabric can improve anti-felting, anti-pilling, dimensional stability and processing stability while maintaining the strength and air permeability of the wool fibers, solves the problem that it is difficult to balance the strength retention and anti-felting, and the processing stability and anti-pilling, and is suitable for the preparation and finishing of wool top raw fabric.

This invention discloses a method for forming hollow tubes based on low-shrinkage PEKK to achieve high-fidelity replication of the inner wall, belonging to the field of precision molding technology for high-performance thermoplastic polymers. The method includes the following steps: material selection, melt contact molding, inner wall morphology replication, shrinkage attachment control, rapid cooling and freezing, and demolding to obtain the finished product. This invention, through a series of structures and precise control of material shrinkage behavior, allows the inner wall morphology of the tube to directly replicate the surface of the mandrel. The roughness difference ΔRa between the inner wall of the tube and the surface of the mandrel is ≤0.3μm, truly achieving high-fidelity replication of the inner wall morphology and fundamentally solving the problem of large replication deviations in traditional molding processes.

The present application relates to photovoltaic encapsulation adhesive film technical field, especially a kind of photovoltaic adhesive film production line suitable for high-speed production, including extruder, casting die, flow forming device, cooling setting device, online thickness measuring device, multilayer track cooling device, flaw detection device, slitting device and winding device being arranged in sequence, cooling setting device includes first cold roll, second cold roll, third cold roll cold roll, fourth cold roll and fifth cold roll, the first cold roll, second cold roll, third cold roll cold roll, fourth cold roll and fifth cold roll are rotatably arranged in bearing seat, one side of first cold roll, second cold roll, third cold roll cold roll, fourth cold roll and fifth cold roll is respectively provided with driving motor, the driving motor is connected with fourth bearing seat respectively.The present application can not only satisfy production under high line speed, but also effectively control the production size of photovoltaic adhesive film, quality is stable, improve film sticky condition, product flatness is good.

The utility model discloses an oxygen breathing device, including gas valve and breathing mask, gas valve is used for installing on oxygen tank, be equipped with press head on gas valve, be equipped with export connection pipe on press head, breathing mask is inserted on export connection pipe, along the axis of breathing mask from left to right, breathing mask includes the connection of export connection pipe gradually, amplification unit and cover mouth department, be equipped with a plurality of ventilation holes that set up in parallel with the axis on amplification unit. Through setting up ventilation hole that sets up in parallel with the axis A on amplification unit, then ventilation hole demoulds along the direction of axis A when injection moulding of mould, simplifies mould structure, and the mould is simple to make, and the size is stable, and production efficiency is high.

The invention aims to disclose a punch-formed ultrathin metal filtering material, a process, a filter and application, and relates to the technical field of punch forming, two surfaces of a metal base material with the thickness of 0.005 mm-0. 03mm are provided with a first reference horizontal plane and a second reference horizontal plane; the first reference horizontal plane is provided with a plurality of first convex hulls which protrude out of the first reference horizontal plane and are arranged in a first array, and the top of each first convex hull is provided with a first special-shaped micropore with the aperture of 20-60 microns; the second reference horizontal plane is provided with a plurality of second convex hulls which protrude out of the second reference horizontal plane and are arranged in a second array, and the tops of the second convex hulls are provided with second special-shaped micro holes with the hole diameter ranging from 20 micrometers to 60 micrometers; the ultra-thin metal filtering material has the beneficial effects that the two surfaces of the metal base material are synchronously stamped to form the ultra-thin metal filtering material, the ultra-thin metal filtering material has a good basis of high temperature resistance and corrosion resistance, and the first convex hulls and the second convex hulls form an uneven surface structure, so that the pollutant holding capacity of the filtering material can be improved.

This invention discloses a method for preparing mullite porous ceramics by adding urea fluorosilicate. The preparation method includes the following steps: accurately weighing the following basic raw materials by mass fraction: kaolin clinker and alumina micro powder; slowly adding urea solution dropwise to fluorosilicic acid solution while continuously stirring throughout the process, and obtaining urea fluorosilicate solution after the system is homogeneous; adding urea fluorosilicate solution, kyanite, mullite whiskers and water to the basic raw materials, mixing evenly and pouring into a mold; placing the mold in an oven at 60~90℃ for sealing and curing for 2~6 hours; after molding, demolding and drying for 24~48 hours, and then holding at 1450℃~1600℃ for 2~4 hours, a mullite porous ceramic with a through-pore structure, high porosity, low thermal conductivity, good flexural strength and dimensional stability is obtained.

This utility model relates to the field of textile fabrics, and more particularly to a green and environmentally friendly fabric, comprising a reinforcing surface layer and an environmentally friendly base layer. A heat-melting yarn is disposed between the reinforcing surface layer and the environmentally friendly base layer. The environmentally friendly base layer is made of regenerated cellulose fibers. The top and bottom ends of the heat-melting yarn are fixedly connected to the reinforcing surface layer and the environmentally friendly base layer, respectively. The heat-melting yarn is woven from heat-melting fibers. The reinforcing surface layer is woven from fiber bundles, which include tensile fibers, flame-retardant fibers, absorbent fibers, polyester fibers, and corrosion-resistant fibers. The tensile fibers, flame-retardant fibers, absorbent fibers, polyester fibers, and corrosion-resistant fibers are bundled together to form a tight structure. This invention solves the technical problems of insufficient environmental performance and functionality in traditional fabrics.

This invention belongs to the technical field of tobacco processing equipment, and provides a modified nylon idler roller for a tobacco processing belt conveyor and its manufacturing process. The idler roller includes a roller shaft, a three-section roller, a positioning sleeve, and a sealing end cap. The three-section roller is integrally formed from modified nylon material, and has an axially extending sleeve groove inside, with friction texture on its outer circumference. The positioning sleeve is embedded in the sleeve groove, and its outer ring has a guide rail that cooperates with the sleeve groove. The three-section roller and the positioning sleeve are axially limited by a snap-fit ​​structure. A brass sleeve is fixed to the inner ring of the positioning sleeve, and the brass sleeve has a bearing housing cavity that rotatably cooperates with the reduced diameter shaft section. The outer wall of the brass sleeve slides in contact with the inner wall of the sleeve groove. The sealing end cap is fixedly connected to the end of the three-section roller and together with the roller shaft and the positioning sleeve, forms a closed chamber. This invention enables oil-free, low-resistance, and sealed rotation, and is suitable for the harsh working conditions of tobacco processing workshops.

This application relates to the technical field of textile printing and dyeing, specifically disclosing a continuous flat-width pretreatment bleaching and washing process for knitted fabrics. The continuous flat-width pretreatment bleaching and washing process for knitted fabrics includes the following steps: pre-wetting: pre-wetting the knitted fabric with a pre-wetting solution to obtain a wetted knitted fabric; vacuum impregnation bleaching: vacuum impregnating and bleaching the wetted knitted fabric with a bleaching solution to obtain a bleached knitted fabric; steaming reaction: sending the bleached knitted fabric into a steaming chamber for a steaming reaction to obtain a steamed knitted fabric; washing: adding the steamed knitted fabric to a washing tank for washing, followed by neutralization treatment to obtain a washed knitted fabric; cooling and setting: cooling and setting the width of the washed knitted fabric to obtain the pretreated bleached knitted fabric.

The application relates to the technical field of glass fiber fabrics, and discloses an ultrahigh modulus uniaxial glass fiber fabric and a preparation method thereof. The ultrahigh modulus uniaxial glass fiber fabric comprises 0 DEG warp yarn, 90 DEG weft yarn and polyester filaments, and the 0 DEG warp yarn, the 90 DEG weft yarn and the polyester filaments all adopt ultrahigh modulus uniaxial glass fibers; the ultrahigh modulus uniaxial glass fiber is prepared through the following steps: step (1), a glass fiber sizing agent is coated on the surface of the glass fiber, the coated glass fiber is naturally air-dried and constant-temperature dried to obtain the glass fiber coated with the resin; step (2), the glass fiber coated with the resin, zeolite molecular sieve, copper powder, ethanol and triethanolamine are mixed to obtain a dispersed resin-molecular sieve mixed system; the molecular sieve mixed system is subjected to a crystallization reaction to obtain the ultrahigh modulus uniaxial glass fiber. The prepared glass fiber fabric has the advantages of high modulus and high hardness.

The invention relates to the technical field of metal powder machining, and particularly discloses a metal powder excess material recycling device which comprises a recycling device body and a hydraulic cylinder, the hydraulic cylinder is fixedly installed on the bottom wall of the top end of the recycling device body, a hydraulic rod is slidably connected to an inner cavity of the hydraulic cylinder, and a pressing block is fixedly installed at the bottom end of the hydraulic rod. According to the metal powder feeding device, quantitative discharging can be carried out when metal powder excess materials are pressed through the discharging assembly, it can be ensured that the amount of metal powder used by each pressed product is consistent, and a film cavity can be automatically cleaned through the pressing assembly after pressing so that the product quality can be improved; residual powder is prevented from being mixed into a new batch of pressed products through automatic cleaning, the product yield is improved, the residual powder is prevented from abrading equipment, the service life of the equipment is prolonged, in addition, the pressed products can be subjected to demolding treatment, rapid taking out is facilitated, and the machining efficiency is improved.

The application belongs to the technical field of high polymer materials, and particularly relates to a heat-resistant blister packaging box and a preparation method thereof. According to weight parts, the heat-resistant blister packaging box comprises the following raw materials: 100 parts of polylactic acid, 4-8 parts of heat-resistant stabilizer, 1-3 parts of nucleating agent, 0.5-1 parts of chain-extending compatibilizer, 0.1-0.5 parts of antioxidant, and 0.1-0.3 parts of release agent. The application designs a multifunctional heat-resistant stabilizer with an aromatic imide-sulfone-siloxane structure, and constructs a synergistic crystallization system with a phenyl zinc phosphonate nucleating agent, and cooperates with a segmented temperature control rapid heat setting process. The heat distortion temperature of the obtained blister packaging box can reach 93.1 DEG C, the light transmittance is kept above 89.5%, the haze is below 3.5%, the forming cycle is shortened to 6-10 seconds, and there is no small molecule migration risk, so that the industrial production needs of the heat-resistant transparent packaging for food contact are met.

The invention discloses a knitted fabric heat-setting machine which comprises a rack, an unwinding device, a winding device, a steam humidifying assembly, a drying assembly and a fabric flattening device, the unwinding device and the winding device are arranged on the two sides of the rack, a partition plate is arranged in the rack, and an inner cavity of the rack is divided into a humidifying cavity and a drying cavity by the partition plate; the steam humidifying assemblies and the drying assemblies are located in the humidifying cavity and the drying cavity correspondingly, the number of the steam humidifying assemblies is two, and the two steam humidifying assemblies and the two drying assemblies are located on the upper side and the lower side of the knitted fabric. The first needling rod and the second needling rod apply tension to knitted fabric conveyed in the rack to straighten and flatten the knitted fabric, then the knitted fabric is dried and shaped through the drying assembly, wrinkles of the knitted fabric can be eliminated, and meanwhile the size of the shaped knitted fabric can be more stable.

The application discloses a kind of based on substructure pre-stabilization ultra-high multilayer printed circuit board manufacturing method, suitable for the number of layers N greater than 20 ultra-high multilayer board manufacturing.The method divides the whole manufacturing process into three stages, and sequentially forms inner core, intermediate and final substructure.The core is: after each manufacturing stage is completed, the complete encapsulation process of metalization, resin filling, grinding and copper cap plating of interconnection hole is carried out, so that the mechanical and electrical stability of the current substructure is realized before entering the next stage of pressing.Meanwhile, for each substructure, its pressing process parameters are independently set to match its material and structural characteristics.The application effectively solves the core problems of poor interlayer alignment accuracy, poor high aspect ratio hole plating uniformity and low overall yield caused by thermal-mechanical stress accumulation in traditional manufacturing of ultra-high multilayer board, significantly improves the reliability and manufacturing efficiency of the product.

The invention belongs to the technical field of nano-antibacterial materials, and provides a micromolecule coated nano-zinc oxide monodisperse antibacterial colloid, the colloid comprises nano-zinc oxide powder, a dispersant and water, the total mass ratio of the nano-zinc oxide powder to the dispersant is (1: 1)-(10: 1), the mass ratio of the nano-zinc oxide powder to the water is (1: 100)-(1: 10000), the total mass ratio of the nano-zinc oxide powder to the dispersant is (1: 1)-(1: 10000), and the mass ratio of the nano-zinc oxide powder to the water is (1: 100)-(1: 10000). The diameter of the nano zinc oxide particles in the colloid is 60 nm to 100 nm. According to the invention, the micro-molecular dispersant is introduced to modify the nano-zinc oxide, and the total mass ratio of the nano-zinc oxide powder to the dispersant and the mass ratio of the nano-zinc oxide powder to water are optimized, so that the nano-zinc oxide can be completely coated with the nano-zinc oxide powder by micro-molecules, and the surface energy of the nano-zinc oxide and Van der Waals force and electrostatic attraction among particles are reduced; and the dispersion performance of the nano-zinc oxide in water can be improved.

The utility model relates to an ultra-thin rolled copper stamping fuse semi-finished product, which is formed by stamping a rolled copper material belt with micron-sized thickness, the formed fuse monomer comprises a sheet-shaped copper substrate, the sheet-shaped copper substrate is divided into three areas along the length direction, the three areas are an opening area, a fuse area and an end part area in sequence, and the opening area, the fuse area and the end part area are arranged on the sheet-shaped copper substrate. A plurality of through holes are formed in the opening area at intervals in an array mode; the two ends of the connection portion are connected with the opposite angles of the hole opening area and the end portion area respectively, the bent portion is connected with the two connection portions, a wavy-line-shaped safety portion is arranged in the middle of the bent portion, and the line width of the safety portion is 0.15 + / -0.02 mm and is smaller than the line width of a main body of the bent portion. According to the utility model, the ultra-thin rolled copper foil is punched by adopting a high-precision die punching mode, a fuse semi-finished product is directly formed, particularly, an ultra-thin fuse part is punched and formed at one time, the defects of flanging deformation and the like caused by multiple times of punching are avoided, and the size and the performance of the fuse part are stable.

The application discloses an ultra-thin woven pile electronic package material fabric and a preparation method thereof. The fabric is interwoven by warp yarn, weft yarn and terry yarn through satin weave, the thickness of the fabric is 0.20-0.25 mm, the fabric surface has pile formed by the terry yarn after sanding, the height of the pile is 0.05-0.10 mm, and the pile height H and the fabric thickness T satisfy H / T<=0.5. The warp yarn and the weft yarn are high-shrinkage polyester, the terry yarn is low-shrinkage polyester, and the root of the terry yarn is clamped and fixed by the warp yarn and the weft yarn in the shrinkage state. The application realizes accurate control and firm anchoring of the pile under the thickness of 0.20-0.25 mm through the cooperation of the satin weave and the high-shrinkage warp yarn and weft yarn, so that the woven pile fabric has the performances of ultra-thin, soft, size stability and non-falling of the cut edge, and the problems of the existing ultra-thin pile fabric, i.e. the pile penetrating the fabric or easily falling off, are solved.

This invention discloses a heavy-duty shield tunneling cutterhead ring, a disc cutterhead, and a TBM (Tunnel Boring Machine) shield equipment, belonging to the technical field of tunneling equipment. The cutterhead ring's main metal element mass percentages are as follows: C: 0.48%–0.56%, Si: 0.68%–0.78%, Mn: 0.35%–0.47%, Cr: 5%–5.6%, Mo: 0.9%–1.5%, W: 0.45%–0.56%, V: 0.7%–0.85%, P / S: 0.013, Ni: 2.8%–3.6%, Cu: 0.085%–0.096%, with the remainder being Fe; its preparation process includes: ... The steel ingots obtained from the smelting of the metallic elements are subjected to high-temperature diffusion at 1250℃ and multi-directional forging. During the billet opening, they are repeatedly upset and drawn into round bars, forged into ultra-fine round bars, blanked, forged, rolled into rings, and then refined, spheroidized and annealed, roughed, and then subjected to composite heat treatment, vacuum quenching, and tempering heat treatment. The vacuum quenching is carried out at 1030℃ for 3-5 hours. The tempering heat treatment is carried out at 350℃ for 3 hours twice and at (530-540)℃ for 5 hours once. The overall hardness of the three tempering processes corresponds to HRC59, HRC60, and HRC62, respectively.