367 results about "Total thickness" patented technology

The invention discloses a three-dimensional printing method and three-dimensional printing equipment for manufacturing a target object. The three-dimensional printing method comprises the following steps: curing a first material to form a first part of a first layer in a plurality of target layers; curing the second material to form a second portion of the first layer of the plurality of target layers; curing the first material to form a first portion of a second layer of the plurality of target layers on the first portion of the first layer, the total thickness of the first portion of the first material being greater than the total thickness of the second portion of the second material; the steps are repeated to form a plurality of target layers of the target object. According to the scheme provided by the invention, various risks caused by the positioning accuracy of movement in the vertical direction are reduced.

The invention relates to the technical field of semiconductor material precision machining, and discloses a 12-inch silicon wafer double-sided polishing upper and lower surface removal amount monitoring system and method, and the system comprises a macroscopic thickness monitoring unit, a microcosmic contact state decoupling sensing unit and a data processing controller. The method comprises the following steps: synchronously acquiring a total thickness signal of a silicon wafer, an acoustic emission signal of an upper / lower fixed disc side and a fluid dynamic pressure signal; the method comprises the following steps: constructing a lubrication state correction coefficient by utilizing fluid dynamic pressure, and carrying out nonlinear correction on a mechanical friction energy index extracted by acoustic emission to obtain an effective vector removal index representing real cutting capacity; and the removal distribution ratio of the upper surface and the lower surface is calculated, and the independent absolute removal amount of the upper surface and the lower surface is obtained through decoupling in combination with the total thickness variation. According to the method, by eliminating the interference of a fluid'water cushion effect 'on a friction signal, visualization and closed-loop feedback control of a single-face removal behavior in the double-face polishing process are achieved, and the problem of silicon wafer warping caused by removal asymmetry is effectively solved.

The invention provides a parameter determination method and device for an elastic flywheel, a storage medium and electronic equipment, and the method comprises the steps: constructing an optimization model, and carrying out the solving calculation of the optimization model according to an optimization variable, a constraint condition and an optimization target, and obtaining a calculation result; wherein the optimization variables are the number of the middle diaphragms, the thickness of a single middle diaphragm and the position relation between any two middle diaphragms, the constraint conditions are the total thickness of the diaphragms and the minimum strength range of the diaphragms, and the optimization target is to minimize the bending rigidity of the middle diaphragms; the target solution of the calculation result comprises the target diaphragm number of the middle diaphragms, the target thickness of each middle diaphragm and the target position relation between any two middle diaphragms. According to the method, under the condition that the torsional rigidity is not changed, the bending rigidity and strength are flexibly controlled by flexibly combining the number of diaphragms, the thickness of the diaphragms, the arrangement sequence of the diaphragms and the like, so that the effects of high reliability and shafting centering compensation capability are considered.

The invention discloses a vacuum cup with a metal shell and an inner container directly compounded and a preparation method. The vacuum cup comprises a metal shell, an inorganic non-metal inner container and a transition layer located at openings of the metal shell and the inorganic non-metal inner container. The transition layer is at least one of a metal transition layer, a metal solder transition layer or a glass solder transition layer, the thermal expansion coefficient of the transition layer is between the thermal expansion coefficient of the metal shell and the thermal expansion coefficient of the inner container, and the thermal expansion coefficient meets the metal shell gt; a transition layer gt; an inorganic nonmetal liner; when the transition layer is a metal transition layer, the relative difference K between the transition layer and the thermal expansion coefficient of the metal shell is less than 60%; when the transition layer is a metal solder or glass solder transition layer, K is less than 20%; the total thickness of the transition layer is smaller than 1 mm. By reasonably controlling the material and thermal expansion coefficient of the transition layer, a middle structure with a deformation inhibition function is formed, thermal expansion deformation of the metal shell is relieved, the welding stress is reduced, the cracking risk is reduced, and reliable and direct compounding of the metal shell and the inorganic nonmetal inner container is achieved.

An optical component including: a substrate on which an optical element is mounted; a transparent sealing member disposed above the substrate and configured to seal the optical element; and a bonded portion in which a plurality of metal films are laminated, and which is configured to bond the transparent sealing member and the substrate. The bonded portion includes: one or more stress relaxation layers constituted by one or more metal films having a Young's modulus of less than or equal to 150 GPa, the one or more stress relaxation layers having a total thickness of greater than or equal to 1.2 μm; and a diffusion prevention layer disposed on each of both sides in a thickness direction of each of the one or more stress relaxation layers, and configured to prevent diffusion of metal constituting the stress relaxation layer.

The invention discloses an AlCrSiWN / CrMoN nano multilayer composite coating with high hardness and self-lubricating performance and a preparation process of the AlCrSiWN / CrMoN nano multilayer composite coating, and belongs to the technical field of coatings. The multi-layer composite coating is a modulation coating formed by AlCrSiWN high-hardness layers and CrMoN self-lubricating layers through alternate deposition, the total thickness of the multi-layer composite coating is 3-4 microns, and the periodic thickness of the multi-layer composite coating is 0.011-0.038 microns. The preparation process of the coating comprises the steps that an AlCrN transition layer of a columnar crystal structure is prepared firstly, then an AlCrSiW target and a CrMo target are started at the same time, the AlCrSiWN / CrMoN nano multilayer composite coating with the nanoscale modulation period and alternate hardness is prepared by regulating and controlling the rotating speed of a rotating frame in a vacuum coating cavity to be 0.6 r / min-1. 5 r / min, and the AlCrSiWN / CrMoN nano multilayer composite coating with the nanoscale modulation period can keep the high hardness of the coating through the soft and hard alternate multilayer structure, so that the hardness of the coating is greatly improved, and the coating has the good application prospect. The toughness and the self-lubricating performance of the coating are improved, and crack propagation is effectively inhibited.

The invention relates to a hole bottom sediment thickness adaptive direction measurement method for irregular hole shapes. The method comprises the following steps: acquiring hole wall images and vertical distance data in multiple directions; image preprocessing is carried out, hole wall feature points are extracted, three-dimensional coordinates are converted, a dynamic three-dimensional model is fitted, deformation grades are divided, and an inclination angle is determined; preferentially distributing detection points in a serious deformation area, calculating an optimal angle, monitoring by a gyroscope, correcting by an electromagnetic damper, adjusting by a servo motor, and ensuring that an included angle between a probe axis and a hole bottom tangent line is compliant; transmitting multi-frequency ultrasonic waves according to deformation grades, analyzing reflected signals through wavelet transformation, extracting sediment layering characteristics, and calculating the distance from a probe to a layering surface through speed correction; the reference distance is calculated based on the reference coordinates, the sediment total thickness and the dense layer thickness are finally obtained, and the measurement method which is adaptive to hole wall deformation, eliminates interference, dynamically adjusts detection parameters and is accurate in reference positioning can meet the high-precision requirement of engineering for sediment thickness and compactness quantification.

The invention discloses a surface coating for prolonging the fatigue life of metal and a preparation method of the surface coating. According to the coating, face-centered cubic structure layers and hexagonal system structure layers are alternately stacked to form a superlattice structure, the total thickness ranges from 1.0 micrometer to 1.5 micrometers, and a base material is titanium alloy. The thickness of the face-centered cubic structure layer is 4-6 nm, the thickness of the hexagonal system structure layer is 1-3 nm, the Mohs hardness difference between the two layers is not larger than 2, and the average grain size is 1-2 nm. According to the coating, a stable high-toughness interface phase is obtained through a specific crystal structure and thickness regulation and control, and dislocation slippage and crack propagation are effectively prevented. A magnetron sputtering method is adopted for preparation, and the process comprises the steps of substrate surface pretreatment, bias cleaning and alternate deposition. The coating shows excellent anti-fatigue performance under the cyclic load condition, and the service life of the titanium alloy component can be remarkably prolonged.

According to the production method of the hot-rolled extra-thick and ultra-wide double-metal composite plate, S30403 is selected as a stainless steel layer, and the stainless steel layer comprises the following chemical components in percentage by mass: 0.02%-0.029% of C, 0.3%-0.5% of Si, 0.8%-1.0% of Mn, less than or equal to 0.04% of P, less than or equal to 0.005% of S, 18.0%-18.8% of Cr, 8.0%-8.2% of Ni and the balance of Fe and inevitable impurities; the base layer is made of Q355B low-alloy high-strength steel and comprises the following chemical components in percentage by mass: 0.06%-0.12% of C, 0.15%-0.3% of Si, 1.45%-1.6% of Mn, less than or equal to 0.02% of P, less than or equal to 0.005% of S, 0.02%-0.05% of Al, 0.008%-0.02% of Ti and the balance of Fe and inevitable impurities; the key process steps comprise assembling, heating, rolling, cooling and finishing, and industrial preparation of the high-performance bimetal composite plate with the width larger than 3.5 m, the total thickness not smaller than 100 mm, the base material larger than or equal to 90 mm and the stainless steel coating larger than or equal to 10 mm is achieved.

To provide a hydrogen generating molded article in which the occurrence or growth of cracks is effectively suppressed.SOLUTION: A hydrogen generating molded article that generates hydrogen by coming into contact with water, wherein (1) the hydrogen generating molded article includes a first resin-containing layer, a second resin-containing layer, and a third resin-containing layer that are sequentially stacked, and (2) the second resin-containing layer includes 1 to 15% by weight of hydrogen generating particles capable of generating hydrogen by coming into contact with moisture, (3) The first resin-containing layer and the third resin-containing layer contain 0% by weight or more and less than 3% by weight of hydrogen generating particles capable of generating hydrogen by contact with moisture, (4) a total thickness of the first resin-containing layer, the second resin-containing layer, and the third resin-containing layer is 25 to 30 μ m, and (5) a thickness of the second resin-containing layer is 5 to 8 μm.SELECTED DRAWING: Figure 1

A container or pouch (40) made entirely of elastomer, comprising a main body (42) having a front wall (46) and a back wall (48) connected to the front wall (46) along an outer peripheral edge (50), and a closure system (44) comprising a front side (70) and a back side (72). The front side (70) has a front sealing profile (84) comprising a male closure element (100), the back side (72) has a back sealing profile (86) and defines a cavity (156), the back sealing profile (86) comprising a female closure element (102), wherein a centerline extension (162) extends through the cavity (156). The back side (72) comprises an inner portion (180) and an outer portion (182), the inner portion (180) comprising the entire cavity (156). A thickness (224) of a thickened region (208) measured in a direction parallel to the centerline (162) is less than 35% of a total thickness (234) of the closure system (44) in a closed configuration measured in a direction parallel to the centerline (162).

The invention discloses an electric arc additive thin-wall component strengthening and toughening method based on laser shock peening. The method comprises the following steps that a thin-wall test piece is prepared; planning an unstrengthened area and a plurality of laser shock strengthening sub-areas on the surface of the test piece; selecting a laser shock peening sub-region, selecting laser shock peening parameters for laser shock peening, and adjusting the laser shock peening parameters until the total thickness of the pore-free layer and the hardened layer meeting the target requirement is obtained, so as to obtain optimized laser shock peening parameters; and selecting a plurality of laser shock peening sub-regions, performing peening by adopting optimized laser shock peening, selecting annealing parameters for annealing treatment, and repeating the annealing parameter adjustment operation until the total thickness of the pore-free layer and the hardened layer meeting the target requirement is obtained, so as to obtain optimized annealing parameters. According to the method, the pore-free layer and the hardened layer with reasonable thicknesses are generated on the surface of the additive aluminum alloy thin-wall part, the near-surface layer strength of the thin-wall part is improved, and the strength and plasticity of the arc additive aluminum alloy thin-wall part are improved at the same time.

The present invention relates to: an optical component (10) obtained by bonding a transparent sealing component (14) to a substrate (44) on which an optical element (12) is mounted, thereby sealing the optical element (12); the transparent sealing component (14); the substrate (44); and a method for producing the optical component (10).According to the present invention, each metallized layer (24, 46) that bonds the transparent sealing component (14) and the substrate (44) is provided with: one or more stress relaxation layers (30), each composed of a metal film having a modulus of elasticity of 150 GPa or less and having a total thickness of 1.2 µm or more; and diffusion prevention layers (28, 32) arranged on both sides of the stress relaxation layers (30) in the thickness direction, which prevent the diffusion of a metal from which the stress relaxation layers (30) are composed.

The invention relates to the technical field of thermal protection composite materials, in particular to a thin-wall gradient thermal protection structure and application. The thermal protection structure sequentially comprises, along a thickness direction, an outer surface layer; the ablation-resistant layer is composed of at least one layer of quartz fiber cloth, and the distance d between the outer side face of the quartz fiber cloth and the outer surface layer is larger than 0 mm and smaller than or equal to 0.3 mm; the heat insulation layer is positioned on the inner side of the ablation-resistant layer; the total thickness of the thermal protection structure is smaller than or equal to 5 mm, and the overall density of the thermal protection structure is smaller than or equal to 0.6 g / cm. According to the thin-wall gradient thermal protection structure, under the extreme lightweight constraint that the thickness is smaller than or equal to 5 mm and smaller than or equal to 0.6 g / cm < 3 >, the extra thermal insulation gain larger than or equal to 5% is obtained through the principle of gradient layering and millimeter-level near-wall ablation resistance.

The application discloses a method for regulating the dynamic performance of hot-pressing molding epoxy vitrimer composites by the V-shaped content of oriented fillers, uses flake graphite as the lamellar oriented filler, and uses the dynamically chemically cross-linked epoxy vitrimer as the resin matrix, so that the content of the lamellar oriented filler is changed by changing the single-layer thickness and the number of layers while keeping the total thickness unchanged, and the V-shaped regulation method of the dynamic performance of the hot-pressing molding anisotropic epoxy vitrimer composites is realized. The dynamic performance of the epoxy vitrimer composite presents a V-shaped change trend with the content of the lamellar oriented filler, which is completely different from the linear inhibition behavior of conventional fillers, and the application can be used for regulating the dynamic performance of the epoxy vitrimer by the V-shaped content of the oriented filler.

Provided: A curable resin laminate with low dielectric properties, capable of easily fabricating an insulating layer with excellent adhesion (peel strength) to the conductor layer. A curable resin laminate comprising: a first resin layer formed of a first curable composition; and a second resin layer laminated on the first resin layer and formed of a second curable composition, the second resin layer having a thickness of 5-35% relative to the total thickness of the first and second resin layers, the first curable composition comprising (A1) polyphenylene ether and filler, wherein the filler content (M) as a total solid component is... B1 The content of the second curable composition is 30% or more by mass, and the content of the filler as a solid component is (M). B2 () is less than 40% by mass, which is M B1 >M B2 The slopes of (A1) and (A2) calculated from the conformation diagrams are less than 0.6.

The invention discloses safety explosion-proof glass with a multilayer composite structure, a preparation method and application, and belongs to the field of safety protection glass. The glass adopts a'tempered glass-bonding layer-polycarbonate reinforcing layer-bonding layer-tempered glass' symmetrical structure, the thickness of the tempered glass on the outer layer and the thickness of the tempered glass on the inner layer are 1.5-3.0 mm, the polycarbonate reinforcing layer is formed by compounding at least two layers of PC plates (the total thickness is 2.0-6.0 mm), and the bonding layer is a PVB or SGP film (the thickness is 0.38-1.52 mm). The preparation method comprises the following steps: overlapping and preassembling, performing vacuum preloading (-0.09 to-0.1 MPa), and performing high-temperature and high-pressure lamination (130-150 DEG C, 1.0-1.5 MPa, and heat and pressure preservation for 2-4 hours). The product can bear 3m free falling body impact of 0.5-1.0 kg of steel balls without penetration, no fragment splashing exists, the light transmittance is larger than or equal to 90%, and the product has the functions of sound insulation, heat insulation and more than 99% ultraviolet ray blocking, and is light in weight and controllable in cost. The glass overcomes the defects of existing products, is suitable for civil automobile glass, household doors and windows, industrial observation windows and other scenes, and is reliable in protection.

The invention relates to a heat preservation construction method for a space double-curved-surface shell structure. The heat preservation construction method is suitable for complex three-dimensional curved-surface structures such as snowmobile and sleigh racing tracks. The method adopts a composite process of mainly spraying polyurethane and assisting local polyurethane plates, and comprises the following steps: firstly, pre-installing polyurethane plates in corner angle areas such as a special-shaped support and a cornice, and then carrying out multi-layer polyurethane on-site spraying on double-curved-surface shell subareas of space at the back and the bottom of a racing track, with the thickness of each layer being less than or equal to 20mm; in the spraying process, the thickness is measured in real time through a probe and dynamically adjusted till the total thickness reaches the design value and the error is smaller than or equal to + / -10 mm; and finally, trimming and cutting the surface and edges and corners, leveling and constructing a protective layer. According to the method, the thermal insulation layer which is integrally continuous, free of cold seams, accurate in thickness and clear in local corner angle is formed at a time, the problems that a complex curved-surface thermal insulation layer cannot be spliced and cannot be measured accurately, and a cold bridge exists are thoroughly solved, refrigeration energy consumption is remarkably reduced, the ice surface quality is improved, and the method is successfully applied to the snowmobile sleigh center of Beijing winter America.

A multilayer film suitable for manufacturing a stretch hood used to secure palletized goods during shipment and transport. The multilayer film comprises at least three layers and includes a first layer comprising a linear low density polyethylene resin having a melt index within the range of 0.20 and 0.60 dg / min and a density within the range of 0.910 to 0.914 g / cm3, a second layer comprising a linear low density polyethylene resin having a melt index within the range of 0.20 and 0.60 dg / min and a density within the range of 0.910 to 0.914 g / cm3, and at least one intermediate layer in between the first and second layers, the intermediate layer or layers including a linear low density polyethylene resin having a fractional melt index and a thermoplastic polyolefin having a melt index within the range of 0.30 and 0.70 dg / 10 min and a density within the range of 0.870 to 0.890 g / cm. The multilayer film having a total thickness between 4.85 and 6.7 mils and a density between 0.909 and 0.913 g / cm3. A stretch hood fabricated from such multilayer film exhibits exceptionally high holding force and, provides robust stability when utilized on palletized goods during transport. A method of manufacture of such multilayer film is also provided.

The invention relates to an aging strengthening aluminum alloy plate strip for carrier gas brazing and a preparation method thereof.The aging strengthening aluminum alloy plate strip comprises a brazing layer, a core layer, a blocking layer A and a blocking layer B. The blocking layer A and the blocking layer B are located on the two sides of the core layer, and the core layer comprises, by mass, 0.8-1.3 wt% of Mg, 0.8-1.3 wt% of Si, 0.5-0.8 wt% of Cu, 0.2-0.5 wt% of Mn, 0.01-0.05 wt% of Ti and the balance Al and inevitable impurities; the thickness of the brazing layer accounts for 9%-11% of the total thickness of the plate strip, the thickness of the blocking layer A accounts for 6%-10% of the total thickness of the plate strip, the thickness of the blocking layer B accounts for 10%-14% of the total thickness of the plate strip, and the rest thickness is the core layer. Compared with a traditional material, the steel plate has higher pre-welding strength and post-welding strength, can adapt to various use environments, and is prolonged in service life. After being brazed, the product can be subjected to aging strengthening according to actual use requirements, different use strengths are obtained, and the product can be suitable for carrier gas brazing with low production cost, can be produced in a large scale and meets the use requirements of the current market.

The invention provides a material thinning process which comprises an insulating material, a positioning through hole is formed in one side of the top of the insulating material, a gum area is arranged at the top of the insulating material, a non-gum area is arranged at the top of the insulating material, and a gum body is arranged at the top of the gum area. The method is reasonable in design, the groove structure is designed in the upper die, the insulating material keeps the original thickness in the non-adhesive area, meanwhile, local precise thinning is achieved in the area needing to be attached with the gum, and compared with a traditional overall stacking process, on the premise that the integrity and strength of the material structure are guaranteed, the total thickness of the composite assembly is remarkably reduced, and the manufacturing cost is reduced. An effective way is provided for realizing thinner design of an electronic product, and the attractiveness and portability of the product are improved.

The application belongs to the technical field of rare earth permanent magnet materials, and particularly relates to a method for integrating hydrogen decrepitation of a rare earth permanent magnet alloy and atomic layer deposition of a copper coating layer. The method is characterized in that the hydrogen decrepitation process of a rare earth permanent magnet alloy ingot or cast piece and the atomic layer deposition process of a coating layer are integrated in the same reaction cavity; first, the rare earth permanent magnet alloy ingot or cast piece is placed in a vacuum reaction cavity, high-purity argon gas is washed multiple times, and then sufficient hydrogen gas is introduced to make the rare earth permanent magnet alloy ingot or cast piece absorb hydrogen and decrepitate into powder and sufficiently dehydrogenate; the hydrogen decrepitated powder is heated to 80-250 DEG C under vacuum for 1.5-4 hours, and a copper coating layer with a total thickness of 10-50 nm is deposited by using the atomic layer deposition method. The application can simplify process steps, improve the coating coverage rate of the coating layer on the surface of the rare earth permanent magnet powder, modify the surface of the magnetic powder, optimize the microstructure of the magnet during the sintering and heat treatment of the coated copper coating layer on the rare earth permanent magnet, and improve the magnetic performance.

This invention discloses a ribbed prestressed concrete composite floor slab and its design method, relating to the field of prefabricated building structure design technology. The method includes calculating the total bearing capacity of prestressed steel bars required in the primary load-bearing direction and the total bearing capacity of ordinary steel bars required in the secondary load-bearing direction, based on the span and load parameters of the target floor slab. The reserved extension lengths of the two types of steel bars are determined according to the precast portion and the total thickness of the composite. The types, spacing, tensile stresses, and precise curve trajectory coordinates of the prestressed steel bars within the precast concrete are designed in detail, and the types, spacing, and arrangement coordinates of the ordinary steel bars are also designed. An internal reinforcement space model of the precast portion is generated based on the coordinate parameters of all steel bars, and a three-dimensional structural model of the ribbed precast template is generated by combining the geometric boundaries. This method achieves refined reinforcement design and digital expression of manufacturing information.

Surface coverings, such as floor coverings, with an interlocking design are described. Methods of making the surface coverings are further described. A plank including a resilient composite sheet having four sides, an upper surface, a lower surface, and an overall thickness, and said composite sheet including at least one base layer, wherein said at least one base layer including at least one polymeric material and at least one filler, wherein opposite sides of the composite sheet include a first tongue on a first side and a first groove on the opposite second side, wherein the first tongue and first groove have complementary shape to each other to be interlockingly engageable with a corresponding groove or tongue on an adjacent floor plank.

A method for measuring a thickness of a substrate for a workpiece including the substrate having a first side and a second side disposed in a direction opposite to the first side may be performed by a computing device and may include receiving, from a first measurement device, first side profile information including total surface position information of the first side, receiving, from a second measurement device, a plurality of pieces of substrate sample thickness information indicating sample thicknesses of the substrate measured at a plurality of sampling points on the first side, and generating, based on the first side profile information and the plurality of pieces of substrate sample thickness information, a substrate thickness map including total thickness information of the substrate.

The utility model discloses a take-up device for PET packing belt production, which comprises a take-up machine and a take-up roller, and the top of the right side of the inner wall of the take-up machine is movably connected with the right side of the take-up roller. Through the arrangement of the stress arc plate, the stress arc plate is pushed to move upwards while the total thickness of the packing belt is continuously increased during winding, then the stress arc plate continuously pushes the pressing piece to move upwards, and the spring switch is pressed when the pressing piece moves to the maximum distance; when the spring switch is pressed, an electric signal can be sent out to start the acousto-optic prompter and close the winding machine, so that the problem that a user needs to observe the total thickness of the packing belt wound on the current winding roller beside the winding roller to judge whether the current winding roller is sufficient in winding or not is solved; the problem that one user cannot manage multiple winding devices at the same time due to the fact that the current winding thickness is detected, or the manufacturing cost of the winding devices is high due to the fact that an electronic detection device is additionally arranged on the winding device is solved, and the effect of conveniently detecting the current winding thickness is achieved.

The invention discloses a metal conductive film for EC, a method, an assembly and application, and the conductive film comprises a first hardening layer, a flexible substrate, a second hardening layer, a bottom sealing cover layer, a first silver function layer, an intermediate dielectric layer, a second silver function layer, a first top sealing cover layer and an external sealing cover layer which are sequentially arranged. The total thickness of the first silver functional layer and the second silver functional layer is 14-18nm, d2-d1 < = 4nm, d1 is the thickness of the first silver functional layer, and d2 is the thickness of the second silver functional layer. Through the optical design of the film layer, the high light transmittance of the product is kept, and the light transmittance of the visible light band is larger than or equal to 83%. Meanwhile, by means of the technological means, Ag alloy is used, special sealing cover layer gold is added, and the durability and reliability of the product can be greatly improved.

The present disclosure provides a screw rod and a screw rod nut assembly, the screw rod comprising: a screw rod body, the screw rod body comprising a threaded section, an outer surface of the threaded section sequentially provided from inside to outside with: a metal chromium base bonding layer, a tungsten carbide hardness support layer, and a DLC functional layer, the DLC functional layer being a diamond-like carbon coating layer; wherein a total thickness T1 of the metal chromium base bonding layer and the tungsten carbide hardness support layer is not less than 0.5 microns, and a thickness T2 of the DLC functional layer is not less than 1.5 microns. The screw rod nut assembly of the present disclosure comprises the above-mentioned screw rod.

The invention relates to the field of conductive adhesive tapes, and particularly discloses a high-performance conductive adhesive tape as well as a preparation method and application thereof. A high-performance conductive adhesive tape comprises a PI and Cu composite substrate layer and a conductive pressure-sensitive adhesive layer in a thickness ratio of (1.5-2.0): 1.0, the total thickness is 10-100 [mu] m, the PI and Cu composite substrate layer is obtained by combining a PI film and a copper foil layer in a thickness ratio of (2.0-2.5): (3.5-4.0), and the conductive pressure-sensitive adhesive layer is prepared from an acrylic pressure-sensitive adhesive base material, titanium carbide conductive nanoparticles and a tackifier in a weight ratio of 100: (5-15): (5-10). And the conductive pressure-sensitive adhesive layer is attached to the copper foil layer. The high-performance conductive adhesive tape not only has good core performance, but also has higher elongation at break, flexibility and oxidation resistance, achieves ideal technical balance, and is suitable for various different use scenes.

The utility model provides a coding device. The coding device comprises a housing, a mainboard and a heat conductor. The shell comprises a containing cavity and at least one heat dissipation face, the heat dissipation face is located on one side of the containing cavity, and heat dissipation fins are arranged on the outer wall of the heat dissipation face. A limiting guide rail is arranged on the inner wall of the containing cavity, the distance between the limiting guide rail and the inner wall of the heat dissipation face is larger than the total thickness of the mainboard and the heat conductor, when the limiting guide rail guides the mainboard to enter the containing cavity of the shell, the mainboard is located below the limiting guide rail, and when the limiting guide rail abuts against the first face of the mainboard to guide the moving direction of the mainboard, the mainboard is located below the heat conductor. A gap is reserved between the heat conductor adhered to the second surface of the main board and the heat dissipation surface; when the main board is located in the containing cavity of the shell, the second face of the main board is bonded with the inner wall of the heat dissipation face through the heat conductor. The coding equipment is convenient to assemble, and the technical effect of improving the heat dissipation efficiency of the mainboard of the coding equipment can be achieved.