197 results about "Afm indentation" patented technology

The invention relates to the technical field of material mechanical property testing, and discloses a material indentation and scratch testing device and method under a composite energy field, and the device comprises a supporting experiment table, a vertical micro-motion platform, a horizontal micro-motion platform, a high-definition optical microscope, a force sensor, a displacement sensor and an additional energy field generation system. According to the method, a controllable additional energy field is synchronously applied while a mechanical indentation or scratch load is applied to a hard and brittle material sample, and load displacement data is collected in real time. In the data processing stage, the real hardness is calculated by adopting a corrected proportion sample resistance model, the elastic modulus is calculated based on the Oliver-Pharr theory, and the fracture toughness of the material is analyzed and calculated according to the size of the indentation tip crack. The problem that in-situ mechanical property characterization cannot be carried out in a composite energy field in a traditional test is solved, the hardness calculation precision is improved, the fracture toughness measurement function is expanded, and the experimental device and method are provided for research of a hard and brittle material composite machining mechanism.

The invention discloses a method for testing heat treatment residual stress of a bearing ring based on nanoindentation, and belongs to the technical field of stress testing. The method comprises the following steps: establishing a calibration curve, preparing and testing a sample, and calculating residual stress. According to the method, the indentation work-residual stress quantitative calibration curve for the bearing steel is established through finite element simulation, the specific constitutive relation of materials is fully considered in the model, and system errors caused by mismatching of material parameters of a general model are eliminated. The change trend of the residual stress value calculated by the method is consistent with that of a prediction result of finite element analysis, and it is proved that the method can accurately, reliably and quantitatively characterize the residual stress distributed in the microscale after heat treatment.

The invention belongs to the technical field of metal material science, and particularly relates to an alloy fracture toughness analysis method and system based on a nanoindentation technology, and the method comprises the following steps: S1, carrying out nanoindentation continuous rigidity test on an alloy sample by adopting a Berkovich indenter to obtain an indentation load-indentation depth curve; performing a tensile property test on the alloy sample to obtain the elongation at break and the intrinsic elastic modulus of the material; s2, linear fitting parameters are determined according to the logarithmic linear relation between the effective elastic modulus and the indentation depth; s3, calculating a critical effective elastic modulus according to a continuous damage mechanics theory; S4, calculating the critical indentation energy of the unit contact area of the target alloy through a P-h curve; and S5, calculating a fracture toughness index according to continuum mechanics and a Griffith fracture theory. The method solves the problems of low efficiency and macro-micro data disjunction of a traditional method, and provides a systematic solution for fracture toughness analysis of plastic materials including but not limited to plastic metals such as zinc alloy, aluminum alloy, magnesium alloy and the like.

The invention provides a Kovar alloy nano-indentation and nano-friction simulation method based on molecular dynamics. The technical key points are as follows: carrying out initial setting on a simulation system and establishing a model; defining a potential function; performing model initialization, including energy minimization, temperature initialization and system relaxation; performing nanoindentation simulation and extracting data; performing nanometer friction simulation and extracting data; and processing and analyzing simulated data, namely outputting a depth-load curve, calculating hardness, fitting and calculating an elastic modulus, calculating a friction force and a friction coefficient, and analyzing wear morphology and dislocation evolution in the alloy through a simulation process file. By analyzing the mechanical properties and the frictional wear properties of the Kovar alloy at different environment temperatures, stable and reliable simulation data is obtained, the actual experiment cost is greatly reduced, and technical guidance is provided for application of the Kovar alloy in the field of vacuum sealing elements.

The invention provides a material constitutive parameter inversion method which can be applied to the technical field of artificial intelligence. The material constitutive parameter inversion method comprises the following steps: acquiring an elastic modulus and an actually measured load depth curve of a to-be-tested material in a single nanoindentation test; performing extrapolation translation preprocessing on the actually measured load depth curve to obtain an equivalent ideal curve; carrying out characterization processing on the equivalent ideal curve to extract input characteristic parameters which comprise press-in rigidity, unloading rigidity and plastic work proportion; the indentation rigidity, the unloading rigidity, the plastic work ratio and the elastic modulus are input into a pre-trained indentation constitutive mapping model to predict the yield strength and the strain hardening index of the to-be-tested material, and the indentation constitutive mapping model is a full-connection back-propagation neural network pre-trained through a finite element virtual test sample. The invention further provides a material constitutive parameter inversion system and device, a storage medium and a program product.

The invention discloses a method for generating a micromechanical property distribution diagram of a solid waste composite cement-based cementing material, and belongs to the technical field of performance prediction of solid waste composite cement-based cementing materials, and the method comprises the following steps: acquiring BSE, EDS and nanoindentation data of a sample; identifying indentation areas in the nanoindentation mark graph, and generating masks corresponding to the areas; performing statistics on the regional masks to obtain element content data of each indentation region; establishing a prediction model by adopting machine learning based on the regional element content and the elasticity data; performing super-pixel segmentation on the BSE image to match the scale of the indentation area; calculating element features of the super-pixel regions, and predicting the elastic modulus of each super-pixel region; and mapping the predicted elastic modulus to a corresponding region to generate an elastic modulus distribution diagram. According to the method, prediction of the two-dimensional space distribution of the internal elastic modulus of the solid waste composite cement-based cementing material can be realized, and data and visual support are provided for material heterogeneity research and multi-scale modeling.

The invention relates to the technical field of metal powder metallurgy process simulation. The high-entropy alloy hot pressing sintering and nanoindentation coupled molecular dynamics simulation method comprises the steps that a three-dimensional multi-particle atomic model of a high-entropy alloy is built, and initial boundary conditions are set; adjusting an initial boundary condition to be a contractility boundary condition, setting process parameters of hot pressing sintering on the model, and executing molecular dynamics simulation of the hot pressing sintering process; performing molecular dynamics and Monte Carlo hybrid simulation on the sintered model; mechanical boundary conditions are set for the optimized atomic model, a virtual indenter is controlled to be pressed into the optimized atomic model, molecular dynamics simulation of a nanoindentation test is executed, and physical field response parameters are collected in the test process; and based on the physical field response parameters, macroscopic mechanical property indexes are extracted. According to the method, the mapping relation between the hot pressing sintering process parameters and the macroscopic mechanical property is established, and a basis is provided for optimization of the hot pressing sintering process of the high-entropy alloy powder.

The invention relates to a nanoindentation and reliability characterization technology thereof, in particular to a heterogeneous material welding reliability characterization method applied to a brush type sealing structure. By means of the nanoindentation technology, mechanical properties such as hardness, elasticity modulus and plastic deformation of the welded joint are obtained by analyzing indenter deformation and indentation morphology. Meanwhile, indentation testing is carried out on different positions of the brush type sealing welding joint, and the performance comparison condition of all areas of the welding joint is obtained. Compared with a traditional reliability characterization means, the device and the method have the advantages that various areas of the heterogeneous welding joint including a base material, a heat affected zone and a fusion zone are tested under the nanoscale, various material performance indexes such as hardness, elasticity modulus and plastic deformation are measured at the same time, and the device and the method have high-precision and multifunctional testing capacity and are suitable for popularization and application. And moreover, the joint cannot be damaged or other properties cannot be influenced, and compared with a room-temperature stretching result, the nanoindentation technology has relatively high reliability and repeatability, and an accurate characterization result is obtained.

The invention discloses a die forging process method for prolonging the service life of a die, which comprises the following steps of: (1) designing the die, improving and optimizing the design structure of a single blank into combined forging of two blanks, dividing a die cavity into single blanks through saw cutting after widening, and reserving a special indentation for saw cutting during design; (2) forging the combined forge piece by adopting die forging equipment; and (3) after forging is completed, the combined forging piece is cut into two independent valve body products along the saw cutting guide indentations. According to the method, the design structure of the flange position of the single forging blank is improved in a combined forging mode, deformation and even cracking of the die caused by narrow and deep die stress concentration are improved, the service life of the die is prolonged, meanwhile, the situation of uneven flash can be effectively improved after design improvement, and the utilization rate of raw materials is increased.

The invention discloses an in-situ force-displacement measuring device and method for a soft material, and belongs to the technical field of material mechanical property testing. The device comprises a base, three spherical supports symmetrically arranged on the base, a carrying disc carried on the spherical supports, and a weight set for applying a vertical load to the carrying disc. The top of the spherical support is coated with dye, and transfer paper is laid on the surface of the tested soft material; under the action of load, the ball body is pressed into the soft material to generate indentations, and the dye is transferred to the paper to form a dyeing area; the area or the equivalent diameter of a dyeing area is obtained through an image acquisition system, and a mapping relation between the area or the equivalent diameter and actual displacement is established in combination with a calibration curve, so that force-displacement response is indirectly obtained. The image processing comprises the sub-steps of preprocessing, binaryzation, morphological operation, connected domain analysis and the like. The calibration curve is established through fitting (u = a.Ab) of a displacement sensor and a power function. The device is simple in structure, low in cost and suitable for rapid and in-situ mechanical property screening and comparison testing of materials such as soft cushions and foam.

Provided is a high-strength steel sheet having excellent member strength, stretch flangeability, bendability, and delayed fracture resistance under atmospheric corrosion and in a coated state. The steel sheet has a prescribed component composition, microstructure and the like, the average value [tau q] of the plastic deformation initiation stress [tau q] measured by nanoindentation at a position 1 / 4 of the sheet thickness of the steel sheet is 2.50-4.10 GPa, the standard deviation [sigma q] of the tau q is 0.30 GPa or less, and the average value [tau q] of the plastic deformation initiation stress [tau q] is 0.30 GPa or less. When [tau s] is the average value of the plastic deformation start stress [tau] s measured by the nanoindentation method at a position 10 [mu] m from the surface of the steel sheet, the ratio of measurement points less than 0.85 * [tau s] is 25.0% or less.

The application discloses a kind of automatic strip's indentation mold plate device, it is related to packaging technical field, including: feed module, including the material disc that is wound with indentation strip, several guide auxiliary wheels and the main press wheel for indentation strip is compressed to indentation bottom plate surface;For separating the paper of indentation strip, it is received between material disc and main press wheel along indentation strip conveying direction;Punching module, including cutting tool, for driving cutting tool to lift along Z axis direction punching power component and for driving cutting tool to rotate around Z axis rotary power component;Head main mounting plate, feed module, paper receiving module and punching module are all arranged in head main mounting plate, to form head;Molding platform;Head movement component, for controlling head relative to molding area along X axis and Y axis moves, and controls head relative to molding area rotates around Z axis;With feed module, paper receiving module, punching module and head movement component are all signal connection control device, and the efficiency and precision of plate making are high, and the scope of application is wide.

The application discloses a kind of thermoplastic composite continuous forming methods.The system includes successively in the direction of material travel: multiple roll unwinding mechanism, flattening arrangement, continuous mould pressing device and double steel belt presser.Wherein, continuous mould pressing device is made of multiple independent presser module, for applying 5-15MPa high pressure to realize the sufficient impregnation of resin to fiber;Double steel belt presser follows immediately, for applying 1-3MPa low pressure to eliminate surface indentation generated in mould pressing process.The application is by high pressure impregnation and low pressure finishing function clear distinction and collaborative use, overcome the technical contradiction that impregnation quality and surface quality are difficult to obtain in prior art, both ensure the excellent internal impregnation quality of composite material, also obtain high surface flatness, realize the continuous production of high-quality thermoplastic composite plate.

The invention discloses a preparation method and a test method of a thin film section nanoindentation test sample. The preparation method comprises the following steps: providing n cuboid samples, wherein the samples meet n * dgt; w, l: w = 1: 1-2: 1, d is the thickness of the sample, l is the length of the sample, and w is the width of the sample; the non-target crystal faces of the n samples are subjected to opposite bonding, the width of an opposite bonding seam is not larger than 1 micrometer, the target crystal faces of the n samples are located on the same side and spliced to form a test face, the test face comprises at least two different target crystal faces, and therefore the self-supporting opposite bonding sample is obtained, the test face of the opposite bonding sample is subjected to polishing treatment, and the self-supporting opposite bonding sample is obtained. And the surface roughness of the test surface is smaller than 5% of the preset indentation depth, so that the section sample is obtained. According to the invention, the test sample is prepared by adopting a sample opposite adhesion mode, so that a plurality of samples can provide a plurality of different sections to be tested, and the test efficiency is remarkably improved.

The utility model relates to the technical field of adhesive tape creasing, and discloses an adhesive tape production-based creasing device which comprises a shell, a top frame is fixedly connected to the top of the shell, a first motor is mounted in the top frame, a first driving shaft is fixedly connected to the output end of the first motor, a first gear is fixedly connected to the outer part of the first driving shaft, and a second gear is fixedly connected to the outer part of the first gear. The device comprises a shell, a plurality of sliding grooves are formed in the left side of the interior of the shell, two connecting rods are slidably connected to the interior of the shell, tensioning rollers are fixedly connected to the exteriors of the two connecting rods, racks are fixedly connected to the tops of the two connecting rods, and limiting shafts are fixedly connected to the sides, away from each other, of the two racks. And the bottoms of the two connecting rods are fixedly connected with limiting plates. According to the utility model, the tension of the adhesive tape in the transmission process is accurately adjusted, the problems of non-uniform indentation, tensile deformation and even breakage of the adhesive tape and the like caused by improper tension of the adhesive tape can be effectively avoided, and the qualified rate of products is improved.

The present invention relates to the field of hollow pouring technology, and specifically discloses a 3D hollow pouring seamless process, which includes the following steps: shaping, PET coating, indentation, PVC coating, mesh film, assembly, heating, body lamination, plaster mold, resin pouring, glue scraping, baking, transfer printing, demolding, oil sealing, and packaging and warehousing. The finished product has a 3D effect and texture, and the product specifications and sizes can also be freely selected. At the same time, the process can realize industrial assembly line batch production, greatly improving work efficiency (per capita daily output is more than 30,000 pieces) and the product qualification rate is also above 98%, thereby reducing production costs and allowing 3D hollow pouring process products to enter people's daily lives at a lower price.

Provided is a laminate having a low refractive index and excellent mechanical strength. This laminate (10) comprises a void layer (11) and an adhesive layer (12), the adhesive layer (12) being directly laminated on one or both surfaces of the void layer (11), the refractive index of the void layer (11) being 1.30 or less as measured in the state of the laminate (10), the nanoindentation hardness being 0.5 MPa or more as measured by pressing an indenter into the adhesive layer (12) by 2000 nm using a nanoindenter, and the refractive index of the void layer (11) being 1.30 or less as measured in the state of the laminate (10). The peel strength between the void layer (11) and the adhesive layer (12) measured using a tensile testing machine at a tensile speed of 0.3 m / min is 3 N / 25 mm or more.

The invention provides a nanoindentation testing method for a composite asphalt mixture, and relates to the technical field of asphalt material performance research. The method comprises the following steps: S1, preparing a double-solid waste epoxy resin composite asphalt mixture test piece; s2, grinding and polishing the test piece by adopting a step rotating speed and composite lubricating liquid synergistic process so as to obtain the surface smoothness meeting the nanoindentation test requirement; s3, acquiring a macroscopic elastic modulus of the test piece, and automatically generating nanoindentation test parameters according to the macroscopic elastic modulus through a pre-established Sigmoid mapping model; and S4, carrying out nanoindentation test according to the test parameters so as to evaluate the micro-mechanical properties of the asphalt mortar, the aggregate and the interface transition area. By reasonably designing the mix proportion and the production process, efficient utilization of the waste asphalt pavement material and the steel slag is achieved, the resource utilization rate is increased, sustainable development is promoted, and a high-performance, economical and environment-friendly solution is provided for road maintenance and repair engineering under complex climate conditions.

The application relates to a method for calculating residual stress based on a nanoindentation technology, belongs to the technical field of residual stress detection, and modifies an existing nanoindentation residual stress detection model to obtain a more accurate nanoindentation residual stress calculation model. The solution comprises the following steps: S1, establishing a residual stress calculation model; S2, setting physical parameters of each engineering material respectively to obtain corresponding nanoindentation P-h curves; S3, adopting finite element simulation to determine load-depth curves of each engineering material under different residual stress conditions; S4, inversely calculating the size of residual stress through the load-depth curve and the residual stress calculation model; S5, comparing the set residual stress and the calculated residual stress to obtain a model correction value corresponding to each engineering material; and S6, fitting the correction values of different materials to obtain a correction value formula, and obtaining a residual stress calculation model suitable for each engineering material.

A component (10) of a domestic appliance, wherein a sheet metal part (12) of the component (10) is formed from a sheet metal (11); characterized in that a regular arrangement of micro-indentations (14) is provided on at least one sheet metal surface (12s1, 12s2) of the sheet metal part (12), each micro-indentation (14) having a depth (d) perpendicular to the sheet metal surface (12s1, 12s2) of not less than 40% of a sheet metal thickness (t) of the sheet metal part (12) and preferably having dimensions (l, w) along the sheet metal surface (12s1, 12s2) of not more than twice the sheet metal thickness (t), more preferably of not more than once the sheet metal thickness (t).

The invention discloses a nanoindentation simulation design-based material indentation depth calibration method, device, equipment and medium, and relates to the technical field of material mechanics characterization, and the method comprises the steps of establishing a continuous gradient material finite element geometric model corresponding to a Brookfield indenter nanoindentation experiment, and constructing a continuous gradient material constitutive model with an elastic modulus continuously changing; combining the two models to perform indentation simulation at a plurality of preset maximum indentation depths to obtain simulation results; calculating an equivalent elastic modulus based on a load displacement curve in a simulation result to determine a material indentation depth corresponding to a preset maximum indentation depth of the indenter; and establishing a quantitative mapping model between the preset maximum indenter indentation depth and the material indentation depth so as to map a test result of the Brookfield indenter nanoindentation experiment at the preset maximum indenter indentation depth to the corresponding material indentation depth according to the quantitative mapping model. And the nanoindentation test result can be accurately mapped to the specific depth position of the continuous gradient material.

The invention relates to the technical field of material physical property measurement, in particular to an indentation characterization method and device for an irregular polymer thin film material and electronic equipment, and the method comprises the following steps: deriving an analytical solution based on dimensional analysis and an elastic-viscoelastic correspondence principle; predicting the relationship between the creep function of the invisible appliance and the time-dependent indentation displacement based on the analytical solution; and under the guidance of preset theoretical analysis, designing an indentation creep experiment under the condition of ensuring that the area of the contact area is basically unchanged, and determining a final creep function of the invisible orthodontic appliance. Therefore, the problems that mechanical testing is difficult to conduct due to the irregular shape of the invisible orthodontic appliance, a quantitative model for the influence of a thermal forming process on the performance is lacked, performance evolution research is insufficient in long-term clinical use, orthodontic scheme estimation deviation is caused, the treatment effect is affected and the like in related technologies are solved.

The invention provides a flexible multi-point compression molding method for a composite material, which comprises the following steps: preheating the composite material, placing the preheated prepreg between an upper multi-point mold and a lower multi-point mold, placing an anti-indentation elastic pad and demolding cloth between the material and the multi-point mold, and then carrying out plastic molding. According to the method, on the basis of the dynamic molded surface adjusting capacity of the reconfigurable multi-point mold, the complex wallboard structural part with the composite curvature characteristic can be efficiently prepared through multi-point forming. Compared with a traditional composite material compression molding mode, the forming problem of a large-size high-double-curvature component with a torsion angle can be solved, the forming quality is guaranteed, the forming efficiency is high, the design, machining and debugging links of a traditional integral type fixed mold are omitted, the earlier-stage investment and cycle cost are greatly reduced, meanwhile, efficient adaptation of the manufacturing process is achieved, and the manufacturing cost is reduced. A highly flexible and efficient manufacturing solution is provided for complex curved surface parts in the fields of aerospace, automobile manufacturing and the like.

The invention relates to a follow-up material supporting technology for aluminum curtain wall plate bending forming, and belongs to the technical field of metal plate machining. A material supporting area is divided into a first near-bending area, a second middle supporting area and a third free end follow-up area, and differentiated material supporting modes of avoiding guiding, same-speed face supporting and rolling traction are adopted; the middle area and the free end area are jointly arranged on the same follow-up base, so that self-driving synchronous follow-up of the plate is realized, and the problems of relative slippage, geometric interference, overhigh local pressure intensity, unstable supporting and the like caused by displacement and overturning of the plate during fixed material supporting in the prior art are effectively solved; the surface defects of scratches, indentations, atomization marks and the like of the visual surface of the aluminum curtain wall plate are remarkably reduced, meanwhile, the consistency and the rebound stability of the bending angle are improved through stable load transfer and continuous surface supporting, and therefore reliable machining under the working conditions of deep bending and high flanging is achieved on the premise that the high appearance quality is guaranteed.

This utility model discloses a forward and reverse creasing and cutting device with quick-change multiple blades, including a movable die-cutting carriage mounted on a die-cutting device. The die-cutting carriage is equipped with creasing blades and / or cutting blades. The device is characterized by further including a linkage slide table opposite to the die-cutting carriage. At least one creasing component is mounted on the linkage slide table to cooperate with the creasing blades on the die-cutting carriage to process forward and reverse marks on thin materials, and / or a blade pad to support the cutting blades on the die-cutting carriage when cutting thin materials. The linkage slide table is provided with mounting grooves for quick disassembly and replacement of the creasing component and / or blade pad. This utility model can perform forward and reverse bidirectional creasing and step-forming on paper and thin materials, and can perform reverse creasing when creasing graphic materials such as cardboard boxes, preventing the graphic creases from bursting.

The present invention relates to a laminate which comprises a polyimide-based film that contains a polyimide-based resin and metal layers that are provided on both surfaces of the film, wherein when the Vickers hardness and the Martens hardness are determined on both surfaces of the laminate in accordance with ISO 14577 under the conditions in which if an indenter is pressed into the laminate from the surface of one metal layer of the laminate in the thickness direction of the laminate, the maximum indentation depth exceeds the thickness of the metal layer on the side where the indenter is pressed into the laminate and is 10% to 50% inclusive of the thickness of the polyimide-based film, formula (I) PV / PM ≤ 0.135 is satisfied. (In the formula, PV represents the difference between the Vickers hardness determined on one surface of the laminate and the Vickers hardness determined on the other surface, and PM represents the difference between the Martens hardness determined on one surface of the laminate and the Martens hardness determined on the other surface.)

The invention discloses a plasticity constitutive parameter inversion method for a zinc sulfide infrared optical brittle material, and belongs to the technical field of material mechanical property characterization. According to the method, a zinc sulfide material nanoindentation simulation model is constructed, a nanoindentation experiment is carried out, meanwhile, an Oliver-Pharr method and a Johnson-Cook constitutive equation are adopted to obtain actual material hardness, elastic modulus and plasticity parameters of zinc sulfide to serve as input material parameters, and an automatic simulation experiment is carried out; the method comprises the following steps: acquiring a simulation displacement-load curve under different constitutive parameter combinations, performing prediction optimization on the displacement-load curve by using a prediction network to obtain a Pareto frontier solution, and constructing an inversion model by using an entropy weight method to obtain an optimal solution in a Pareto frontier solution set. According to the research, accurate characterization of the plasticity constitutive behavior of the zinc sulfide infrared optical brittle material is realized, and reliable method support can be provided for constitutive parameter identification and intelligent modeling of other brittle polycrystalline materials.

The embodiment of the invention provides a material identification method and device, electronic equipment and a readable storage medium, and the method comprises the steps: obtaining an elastic mechanical parameter and a non-elastic mechanical parameter of a target material according to a nanoindentation technology; wherein the elastic mechanical parameters comprise the elastic modulus and the hardness, and the inelastic mechanical parameters comprise the fracture toughness and the creep parameter; analyzing the elastic mechanical parameters and the inelastic mechanical parameters by adopting a statistical deconvolution method to obtain different corresponding mechanical parameters in the target material; and respectively confirming the types of different phases according to the mechanical parameters. According to the method, the elastic mechanical parameters and the inelastic mechanical parameters are collected at the same time to comprehensively analyze the material, analysis and recognition of different phases in the material can be more accurate, and the user experience is improved.

The present invention provides a hot-stamped part including a base steel sheet containing 0.19 to 0.25% by weight of carbon (C), 0.1 to 0.6% by weight of silicon (Si), 0.8 to 1.6% by weight of manganese (Mn), 0.03% by weight or less of phosphorus (P), 0.015% by weight or less of sulfur (S), 0.1 to 0.6% by weight of chromium (Cr), 0.001 to 0.005% by weight of boron (B), 0.1% by weight or less of an additive, the remainder of iron (Fe), and other inevitable impurities, wherein the number of indentation dynamic strain aging in the indentation strain rate observed with respect to an indentation depth of 200 to 600 nm during nanoindentation testing is 26 to 40.

The utility model discloses a kind of double-tooth cutter line directional bending templates, belong to packaging box production technical field, including substrate, the working surface of the substrate is provided with die cutter group according to the outer contour of carton development drawing, indentation cutter group is arranged in the closed shape enclosed by die cutter, and the indentation cutter group is used to press the crease of corrugated board;First tooth cutter is arranged on the substrate position for processing first crease, indentation blade and second tooth cutter are arranged on the substrate position for processing second crease.The utility model can ensure that folding action must be carried out according to predetermined order from structure, so that the problem of jam and shutdown caused by sequence reversal is completely solved.