239 results about "Fiber breakage" patented technology

The invention discloses an automatic testing device and method for multi-directional tensile strength of textiles based on constant tension, and relates to the technical field of tensile strength detection.The automatic testing device comprises a rigid rack system, and a high-elastic fabric optical response mechanism is integrated on a double-stand-column portal frame of the rigid rack system; the fiber damage process is reflected through the light transmittance of light to the fabric and the light spot change; the high-elastic fabric optical response mechanism comprises a sealing light insulation assembly, a light source assembly and an imaging assembly. The light source assembly comprises pulse LED light source arrays arranged at equal intervals in the fabric stretching direction, a lampshade and a transverse movement driving unit. The problems that in the prior art, when the tensile strength of a fabric is detected, only the limit value when a sample is completely broken can be recorded, and microcracks generated by step-by-step failure of fibers in the stretching process cannot be captured are solved. The device has the advantages that when the tensile strength of the fabric is detected, the fiber fracture process in the fabric is directly reflected through the change of light spots formed by light penetrating through the fabric, and the like.

The invention relates to the field of carbon fiber composite material mechanics, in particular to a fine evaluation method for the strength of a small-size large or full-opening CFRP (carbon fiber reinforced plastic) shell, which comprises the following steps: establishing a microscopic damage model containing material anisotropy, defining damage variables and evolution equations, uniformly quantifying multi-scale damage behaviors such as fiber fracture, matrix cracking and layered expansion, and evaluating the strength of the small-size large or full-opening CFRP shell. The problem that a traditional single-scale model cannot represent the multiphase coupling effect is solved; through cross-scale transmission of damage variables, whole-process prediction from microscopic damage initiation to macroscopic failure is realized, and the precision of strength evaluation of the complex opening structure is significantly improved. The method realizes refinement, reliability and engineering practicability of strength evaluation of the small-size large-opening or full-opening CFRP shell, is particularly suitable for the fields of aerospace and the like with extremely high requirements on structural weight and safety, and has remarkable technical leading and application value.

The invention discloses an intelligent detection system and method for the fracture specific strength of cotton fibers, and relates to the technical field of cotton fiber detection, and the intelligent detection system for the fracture specific strength of the cotton fibers comprises a sampling module, an image acquisition module, a resistance measurement module, a strength measurement module and a central control module. The sampling module is used for sampling on a cotton fiber sample and constructing the sample into a to-be-detected cotton fiber bundle; the image acquisition module is used for acquiring image information of a to-be-detected cotton fiber bundle; the resistance measurement module is used for measuring resistance information of the to-be-detected cotton fiber bundle; the strength measurement module is used for snapping the to-be-detected cotton fiber bundle from a fracture area of the to-be-detected cotton fiber bundle and recording real-time tension information and displacement information of the fracture area; the central control module is in communication connection with the image acquisition module, the resistance measurement module and the strength measurement module. According to the invention, the detection of the cotton fiber fracture specific strength in a non-standard laboratory environment can be realized.

The utility model relates to the technical field of injection molds, in particular to a dipping mold for a fiber reinforced composite material, which comprises a first mold plate, a second mold plate and a forming cavity arranged between the first mold plate and the second mold plate, the forming cavity comprises a feed port, a plurality of mold cavities and a discharge port, fibers enter from the feeding port, bypass the impregnation module and are discharged from the discharging port, the forming cavity is further communicated with a feeding port used for feeding resin melt, and the impregnation module which rotates to adjust tension is arranged in the mold cavity. According to the dipping mold for the fiber reinforced composite material, the dipping module in each mold cavity can rotate to adjust the tension applied to the fiber in the mold cavity, so that the poor dipping effect caused by too small tension and too small contact area of the fiber and a resin melt is avoided, and meanwhile, the fiber breakage caused by too large tension is avoided; therefore, the product impregnation effect is effectively improved.

The invention relates to the field of a characterization method of a damage mechanism of a carbon fiber composite material, in particular to a characterization method of a microscomic damage mechanism of a small-size large or full-opening CFRP (Carbon Fiber Reinforced Plastics) shell, which comprises the following steps of: systematically researching initiation positions, expansion paths and interaction mechanisms of fiber fracture, matrix cracking and interface debonding in an opening area; determining the influence of multi-axial stress, dynamic load and temperature gradient on damage distribution and expansion rate; secondly, establishing cross-scale quantitative correlation; through multi-modal experimental data, a quantitative relation between microscopic damage parameters and macroscopic mechanical properties is constructed, and accurate mapping from material microscopic behaviors to structure macroscopic responses is achieved; and finally, constructing a damage high-precision characterization method. A damage model taking layer design, machining precision and environmental load into consideration is developed, the problems that a multi-damage coupling mechanism is not clear and cross-scale modeling depends on experience are solved, and theoretical support is provided for shell anti-damage design.

The invention discloses an chemi-mechanical pulp production method capable of improving the filtration property of chemi-mechanical pulp, and relates to the technical field of papermaking, high-concentration grinding freeness is optimized to 640 + / -30ml, pulp fine fibers can be controlled at 22%-33%, the tensile index middle-lower limit and the bulk middle-upper limit, the high-concentration grinding effect is improved, the effect between fibers is facilitated, the effect between the fibers and a grinding sheet is reduced, and the filtration property of the chemi-mechanical pulp is improved. Fiber cutting is reduced, and the content of pulp fine fibers is reduced; the MSD torque is increased to 250 + / -10 KNM, the tearing effect of wood chips is improved, the preimpregnation reaction of the wood chips is facilitated, the original fine content is controlled to 26%-29% from original 22%-33%, the pulp bulk is increased by about 0.1 cm < 3 > / g, and the tensile index is increased by 1.0 N.m / g; the four low-concentration grinders are changed into parallel connection, so that the residence time of pulp in the low-concentration grinders is prolonged, the cutting effect of the pulp ground by the low-concentration grinders on fibers is reduced, light friction between grinding sheets and the fibers is increased, fibrillation of the fibers is facilitated, the bulk and the tensile strength are improved to a certain extent, and under the content of fine fibers, the size of the fibers is reduced. And the bulkiness and the tensile index of the finished pulp are also improved to a certain extent.

The invention discloses a high-toughness anti-ultraviolet PET (Polyethylene Terephthalate) fiber and a preparation method thereof, belongs to the technical field of polyester fibers, and is used for solving the technical problem that the mechanical strength, the ultraviolet resistance and the moisture absorption and quick drying performance of the PET fiber in the prior art need to be further improved. The invention relates to a high-toughness anti-ultraviolet PET (Polyethylene Terephthalate) fiber which is prepared from modified PET, modified polyester, modified montmorillonite, epoxy modified polysiloxane and an additive in a weight ratio of (55-60): (30-35): (10-16): (20-30): (3-5), according to the invention, the modified montmorillonite is used as a heterogeneous nucleation point, and a PET molecular chain composed of the modified PET, the modified polyester and the epoxy modified polysiloxane is induced to be arranged in a height orientation manner along the drafting direction, so that the breaking strength of the PET fiber is improved, a relatively high elongation at break is maintained, and the anti-ultraviolet effect and the moisture-absorbing and quick-drying performance of the PET fiber are improved.

The invention relates to the technical field of fiber performance test and evaluation, in particular to a method for rapidly measuring the fiber breakage rate of a fiber bundle by combining a computer and amplification equipment. The invention provides a rapid detection method of a fiber end breakage rate. The detection method comprises the following steps: S1, preparing a sample; s2, obtaining a fiber cross section; s3, automatically identifying the image; and S4, calculating the fiber end breakage rate. According to the method, a laser confocal microscope is adopted to amplify the fiber cross section and continuously photograph the fiber cross section for multiple times, computer image analysis software is adopted to automatically identify and integrate the obtained whole bundle of fiber cross sections, overlapping areas among photos are removed, and the complete and accurate fiber cross section is obtained. Metallographic software is adopted to identify and mark the cellosilk, so that the rapid and accurate measurement of the cellosilk is realized.

The invention provides a modified engineering plastic melt index real-time monitoring method which comprises the following steps: determining a melt index difference value of adjacent monitoring points by acquiring a melt index value of each section of an extrusion production line; obtaining the number of shearing cycles of the extrusion production line, identifying the fiber shearing damage degree of each section according to the melt index difference and the number of shearing cycles to obtain fiber damage distribution, and determining the fiber fracture position according to the fiber damage distribution; the melt index difference value corresponding to the fiber fracture position is analyzed by obtaining the melt index of the fiber fracture position, and the monitoring point interval is dynamically adjusted through the melt index difference value; and obtaining the melt index value and the fiber shortening amplitude after the interval adjustment of the monitoring points, and comparing the melt index change and the fiber length loss of each monitoring point to obtain the corresponding distribution of the fiber shortening amplitude and the melt index value.

The utility model provides a broken optical fiber collecting device, and belongs to the technical field of optical fiber collecting devices. The device comprises a wire arranging wheel; the pressing wheel set comprises a movable traction wheel and a driving traction wheel, the movable traction wheel is close to the driving traction wheel when fiber breakage occurs at the downstream of the pressing wheel set, and the driving traction wheel rotates; the fiber pressing mechanism is used for pressing the target section of the optical fiber at the first position to a target position when the optical fiber is broken; the temporary take-up reel is arranged at the upstream of the fiber pressing mechanism and is configured to rotatably collect the optical fibers; the clamp is fixed at the temporary take-up reel and is used for clamping the target section of the optical fiber when the target section of the optical fiber is pressed down to a target position; and the cutting piece is located at a second position between the clamp and the pressing wheel set, and the cutting piece is used for cutting off the target section of optical fiber at the second position. The broken optical fiber collecting device provided by the utility model can avoid the problems of optical fiber waste, low collecting efficiency and high labor cost during fiber breaking.

The invention discloses a dry hot rock reservoir horizontal well fracturing fiber breakage early warning method based on DAS monitoring, which comprises the following steps: firstly, collecting a vibration signal in a shaft through a DAS (Distributed Acoustic Wave Sensing) system, and carrying out wavelet threshold denoising, data segmentation and normalization processing to obtain preprocessed signal data; secondly, performing time-frequency analysis on the signal by adopting a short-time Fourier transform analysis method so as to identify energy distribution of different frequency bands and visualize a high-energy region, thereby identifying an abnormal broadband; then, phase wrapping detection is carried out, whether the signals exceed a dynamic range or not is verified, and the strain rate and histogram features of the phase signals are calculated; and finally, the standard deviation of the strain rate is evaluated through normal distribution modeling and maximum likelihood estimation, and once the standard deviation exceeds a set threshold value, fiber breakage risk early warning information is sent out. According to the method, the signal processing technology and the statistical analysis technology are effectively integrated, the safety of fracturing operation is improved, and meanwhile reliable technical support is provided for efficient development of the hot dry rock reservoir.

The invention relates to the field of material detection, and discloses a tensile strength detection device and process for production quality inspection of a new material medical tourniquet. Which comprises a controller, a machine frame, a vertical screw rod transmission mechanism fixed on the machine frame, a lower clamping device driven by the vertical screw rod transmission mechanism to ascend and descend, and an upper clamping device located over the lower clamping device and fixed relative to the machine frame, and is characterized by further comprising a follow-up shielding mechanism and a damage recognition mechanism; the follow-up shielding mechanism comprises a left shielding plate and a right shielding plate, and the left shielding plate and the right shielding plate cover the top exposed area of the vertical lead screw transmission mechanism. The damage identification mechanism generates a trigger signal when fiber fracture or local damage occurs to the sample, the damage identification mechanism is electrically connected with the controller, and the controller is electrically connected with a driving motor of the vertical lead screw transmission mechanism. According to the invention, fiber damage caused by defects of the sample during initial detection can be identified, so that the problems of invalid detection and fiber scattering are reduced.

The present application relates to the technical field of cotton fiber detection. A kind of intelligent beam fiber strength tester, including cabinet, industrial computer, sliding table module is provided in cabinet, sectional material frame, air cylinder, beam fiber clamping mechanism, stepper motor, lever type pull rod, force sensor, displacement sensor, resistance detection plate, A / D acquisition conversion module;The application method of the tester, steps include: under normal environmental conditions, beam fiber clamping mechanism clamps fiber sample, obtains moisture regain R by resistance moisture regain conversion program conversion;Stepper motor drives lever type pull rod to stretch sample, data is made into the tensile curve F (e) of beam fiber sample-e by industrial computer, and machine learning model predicts the corrected breaking strength value and elongation rate.The present application is simple and reasonable in structure, can realize the quick and accurate measurement of cotton beam fiber breaking strength value and breaking elongation rate under different humidity conditions in normal environment, is high in informatization degree, economic and practical, and improves the accuracy of test result.

The utility model discloses an antibacterial flax blended yarn which comprises flax fibers, first blended fibers are wound on one sides of the flax fibers, second blended fibers are wound on one sides of the first blended fibers, and third blended fibers are wound on one sides of the second blended fibers. According to the linen blended yarn, the second blended fiber and the third blended fiber are added to the linen blended yarn, the second blended fiber is the cotton fiber, the cotton fiber can improve the hygroscopicity and air permeability of the yarn and reduce the dryness and vulnerability of the yarn, and therefore the anti-fracture performance is improved, and the third blended fiber is the polyester fiber. According to the flax blended yarn, the polyester fibers have high elongation at break and evenness, the spinnability and breaking strength of the blended yarn can be improved, meanwhile, the whole flax blended yarn is formed by weaving various fibers in a crossed mode to be in a twisted shape, force borne by the yarn is evenly dispersed, the possibility of fiber breakage is reduced, and therefore the purpose that the flax blended yarn can be prevented from being broken is achieved.

The utility model discloses a rotary tensile test structure for washing-resistant terylene grey cloth, and relates to the technical field of tensile test of terylene grey cloth. The rotary tensile test structure comprises a bottom plate, a PLC (programmable logic controller) and a touch screen are fixedly mounted above the bottom plate, and a stretching mechanism for stretching the grey cloth and a fixing mechanism for fixing two ends of a grey cloth sample are mounted above the bottom plate. The stretching mechanism comprises sliding rails fixed to the left side and the right side of a bottom plate, the rotating speed of a winding motor and the retraction rate of a stretching piston are coordinated through a PLC so that the winding tightness can be guaranteed, a ratchet wheel at one end of a limiting pipe can prevent the limiting pipe from rotating under the limitation of a pawl, the stretching piston stretches after winding is completed, and a gray fabric sample is stretched. According to the mode, the pressing plate in the limiting pipe only plays a temporary fixing role, the stress contact surface is enlarged through multi-layer wrapping, the unit area pressure is reduced, and therefore the risk of local indentation or fiber breakage is reduced.

The application discloses a constant-tension-based textile multidirectional tensile strength automatic testing device and method, relates to the tensile strength detection technical field, and comprises a rigid frame system; a high-elastic fabric optical response mechanism is integrated on a double-column portal frame of the rigid frame system and is used for reacting fiber damage processes through light transmittance and light spot change of the fabric; the high-elastic fabric optical response mechanism comprises a sealed light isolation component, a light source component and an imaging component; the light source component comprises a pulse LED light source array, a lampshade and a horizontal movement driving unit which are equidistantly arranged along a fabric stretching direction. The application improves the prior art which can only record the limit value when a sample is completely broken and cannot capture microcracks generated by fiber step-by-step failure in a stretching process when the fabric tensile strength is detected. The application has the advantages that the fiber breaking process in the fabric can be directly reflected through light spot change formed by light penetration of the fabric when the fabric tensile strength is detected.

The invention discloses a method for evaluating the residual strength of a multi-scale fiber-reinforced flexible pipe under a stretch-bending load, and relates to the technical field of structural strength evaluation of ocean engineering composite materials, and the method comprises the following steps: extracting fiber distribution characteristics by adopting digital image processing based on a scanning electron microscope image; a Monte Carlo method is combined to construct a two-dimensional RVE geometric model of the fiber reinforced structure containing the damp-heat degradation, and macroscopic elastic parameters are predicted; a VUMAT user material subprogram containing dynamic damage is written based on Fortran, damage starting and evolution failure criteria of a fiber reinforced structure are embedded, and the nonlinear coupling evolution process of multiple damage modes such as fiber fracture, matrix cracking and interface debonding is simulated. According to the method, a material-damage-response multi-scale analysis framework is constructed by coupling microscopic material components, a microscopic damage model and macroscopic pipeline structure analysis, the problem that a traditional method lacks multi-scale damage coupling analysis under a complex load is solved, and the residual strength evaluation precision of the pipeline under the action of a stretching-bending combined load is improved.

This invention belongs to the field of graphene fiber processing technology, and relates to a two-step sizing process for graphene fibers. The sizing agent used in the first sizing step is denoted as sizing agent A, and the sizing agent used in the second sizing step is denoted as sizing agent B. Sizing agent A comprises a cationic polyether polyurethane slurry, a volatile ester co-solvent, and water; sizing agent B comprises a cationic polyether polyurethane slurry, a lubricant, and water. The lubricant is one or more of the following: polyether-modified polydimethylsiloxane, polyether-modified heptamethyltrisiloxane, oxidized polyethylene wax emulsion, polytetrafluoroethylene emulsion, and polyethylene glycol monooleate. After sizing, a polyurethane film layer forms on the fiber surface, which can absorb and disperse stress, improve bundle strength, bending performance, and abrasion resistance, solve the problems of fiber breakage and flyaways, and simultaneously fill the gaps between fibers, improving electrical and thermal conductivity to meet the requirements of high-speed weaving processing.

The present invention discloses Trichoderma asperellum ZC3 and its application in the degradation of Zanthoxylum bungeanum branches. This strain has a fast growth rate and strong degradation ability. In a liquid filter paper strip culture medium, after culturing at 28 °C for 7 days, the filter paper strip completely disintegrates; in a solid culture medium of Zanthoxylum bungeanum branch powder, after culturing at 28 °C for 40 days, its lignin degradation rate for Zanthoxylum bungeanum branches reaches 78.11%, and the degradation rates of cellulose and hemicellulose reach 82.58% and 75.84% respectively. Under a scanning electron microscope, obvious fiber breakage and structural disintegration phenomena can be seen in the Zanthoxylum bungeanum branches, showing a high degradation ability. In addition, the lignin-degrading bacterium ZC3 has good tolerance to the leaching solution of Zanthoxylum bungeanum branches.

The utility model relates to the technical field of optical fiber end face machining, in particular to a novel optical fiber end face grinding device which comprises a workbench. The grinding machine comprises a time setting panel, a display panel, a grinding rotating disc rotating switch and a clamp cylinder rotating switch, the rapid locking device is arranged, and the driving ring is simply pressed, so that the half-petal plate can be unfolded and folded, and the optical fiber can be rapidly mounted and locked; complex multi-step operation is not needed, the optical fiber installation time is greatly saved, the working efficiency is improved, in the optical fiber installation process, due to the fact that the half-petal plates are stably unfolded and closed, and the force applied to the optical fiber in the locking process is uniform, the damage risk to the fragile optical fiber core without a coating layer and a protection layer is reduced, and the service life of the optical fiber is prolonged. The possibility of optical fiber breakage is reduced, and the optical fiber material cost is saved.

The invention relates to the technical field of flywheel energy storage system structure optimization, and discloses a flywheel energy storage system variable thickness flywheel profile optimization method, system, device and medium, and the method comprises the steps: building a dual-target optimization model, and taking the maximum unit mass energy storage density and the minimum maximum centrifugal stress as targets; the geometric boundary of the flywheel, the orthotropic property of the composite material and the lamination process constraint are considered, the reasonable and feasible design is ensured, and the failure states such as interlayer stripping or fiber fracture are reduced. And further parameterizing flywheel thickness distribution by adopting a third-order B-spline function, forming a design parameter space in combination with a fiber laying angle, setting a non-uniform node vector and an adjacent coefficient difference upper limit constraint, and ensuring radial smooth change of the thickness. An optimized data set is generated through finite element simulation based on a parameterized model, and a foundation is laid for physical information neural network training. The method provides a scientific, efficient and reliable design optimization scheme for the flywheel energy storage system, and assists energy transformation and sustainable development.

The invention provides an efficient flax fiber degumming device and method, and relates to the technical field of flax fiber textile production, the efficient flax fiber degumming device comprises a degumming box, a conveying assembly, a compression roller assembly and a reciprocating rolling driving mechanism; a sliding table is arranged in the degumming box, and a reciprocating sliding plate is arranged on the sliding table; the conveying assembly comprises a conveying belt, a driving roller, a driven roller and a driving motor. The device has the beneficial effects that the pressing roller assembly of the device can press the conveying belt downwards to apply pressure to linen fibers on the reciprocating sliding plate, and the driving roller can drive the reciprocating sliding plate to slide in a reciprocating manner through the reciprocating rolling driving mechanism, so that the linen fibers can be rolled through the synergistic effect of the conveying belt and the reciprocating sliding plate; the linen fibers are subjected to reciprocating rolling force perpendicular to the movement direction in the conveying process, dynamic kneading and rolling are achieved, the colloid stripping efficiency is remarkably improved, degumming is more uniform, the linen fibers can be elastically pressed downwards through the pressing roller assembly, and fiber breakage caused by rigid extrusion is avoided.

The present invention provides a polypropylene-viscose-linen fiber blended mattress spring wrap and a preparation method thereof, which belong to the field of non-woven fabrics. The preparation method of the polypropylene-viscose-linen fiber blended mattress spring wrap comprises the following steps: opening and mixing, carding, laying nets, needle punching reinforcement, and post-processing. The polypropylene-viscose-linen fiber blended mattress spring wrap and the preparation method thereof of the present invention can not only realize the concept of green and sustainable development, but also improve the mechanical properties and corrosion resistance of the mattress spring wrap while improving the anti-aging performance of the non-woven fabric; at the same time, in the preparation process of the blended mattress spring wrap, it can effectively avoid the problems of difficult-to-control entanglement state, poor blending uniformity, difficult-to-control soft and hard style, and unstable overall performance of the mattress spring wrap caused by inconsistent raw material fiber characteristics; effectively avoid fiber breakage during the carding process, and avoid fiber adhesion during the laying net process, thereby improving the preparation yield of the mattress spring wrap.

The present application relates to the technical field of aromatic polyamide polymer, in particular to a modified poly-p-phenyleneterephthalamide fiber with high elongation at break and a preparation method thereof.The present application introduces a small amount of 3,4'-diamino diphenyl ether and a fourth monomer containing a bis-amino phenoxy functional group during polymerization, and controls the molar ratio of the third monomer and the fourth monomer in the total amount of diamine monomer, thereby to a certain extent, the rigid molecular chain structure of the conventional p-aramid is destroyed, while the breaking strength of the fiber is maintained, the elongation at break of the polymer fiber is enhanced, the modified poly-p-phenyleneterephthalamide can still be prepared by dry spraying wet spinning process, the cost of building a new production line in the factory is saved, the process conditions and parameters are optimized, the fiber with stable elongation at break index is obtained, and the prepared fiber has an elongation at break of more than 3.6%.

This application belongs to the field of silicon core tube technology and discloses an underground communication silicon core tube with an anti-settlement compensation section structure. The core tube structure includes a core tube assembly and a connecting assembly. The core tube assembly includes two corrugated tube bodies with a certain degree of elasticity and two inserts fixed to the two end faces of one of the tube bodies. The end faces of the two tube bodies are close together. The end face of the other tube body has slots for insertion into the inserts. The number of slots is equal to the number of inserts, and their positions correspond one-to-one. This application, through improvements to the existing structure, reduces the difficulty of replacing damaged silicon core tubes compared to the existing one-piece molding method. Only the damaged part needs to be replaced, simplifying the construction process, reducing workload, and shortening the construction cycle. Furthermore, the corrugated structure reduces the probability of fiber breakage and transmission degradation caused by deformation stress transmitted to the internal optical cable.

The invention relates to the technical field of carbon fiber demolding cloth production, and discloses a carbon fiber demolding cloth automatic welding device which comprises a welding table, an ultrasonic welding assembly and a flexible clamping assembly, the ultrasonic welding assembly and the flexible clamping assembly are installed on the welding table, and the ultrasonic welding assembly comprises a lifting seat and an ultrasonic welding tool bit connected with the lifting seat; the two sets of flexible clamping assemblies are symmetrically distributed on the two sides of the ultrasonic welding tool bit, each flexible clamping assembly comprises an overturning base and an overturning frame installed on the overturning base, a clamping plate is installed on each overturning frame, a plurality of bags are embedded in the bottom end of each clamping plate at equal intervals, and each bag is filled with hydraulic oil containing magnetic particles. And electromagnetic coils corresponding to the bag bodies are embedded at the bottom end of the clamping plate. By finely adjusting the magnetic field intensity of the electromagnetic coil, the hardness of the bottom end of the bag body is dynamically adjusted, uniform distribution of clamping force is ensured, flexible contact and stable fixation are both considered, and the problems of fiber breakage and cloth damage caused by traditional rigid clamping are solved.

This utility model discloses a novel silk fabric cutting device, including a housing. An arc-shaped cutting seat is fixedly connected inside the housing, and a guide plate is fixedly connected to the outer wall of the housing. A cylinder is fixedly connected inside the housing, and a U-shaped frame is fixedly connected to the bottom of the cylinder's output end. Two cylinders are fixedly connected inside the housing, and a blade holder is fixedly connected to the bottom of the U-shaped frame. A cutting blade is fixedly connected to the bottom of the blade holder. This utility model provides stable support for the novel silk fabric body from below through the arc-shaped cutting seat. The cylinder-driven U-shaped frame, with the sliding limit between the cylinders and the groove, ensures that the cutting blade always moves vertically and engages with the arc-shaped cutting seat. Combined with the compression limit of the rubber seat, it effectively prevents the novel silk fabric body from shifting during cutting, preventing edge fuzzing or fiber breakage.

This utility model discloses a fiberglass feeding device for preventing fiber breakage, including an operating table. A frame is fixedly installed at the lower end of the operating table. Fixed posts are fixedly installed at both the front and rear ends of the upper center position of the operating table. A sliding groove is provided inside the fixed post. A lead screw is installed inside the sliding groove. The upper and lower ends of the lead screw are rotatably connected to the inner wall of the sliding groove, respectively. A movable seat is sleeved on the outside of the lead screw. The movable seat slides and limits the sliding of the sliding groove, and one end of the movable seat extends to the outside of the sliding groove. An L-shaped fixed plate is fixedly installed on the outside of one end of the movable seat. A third fixed frame is installed above the L-shaped fixed plate. A tensioning cylinder is installed between the third fixed frames. The front and rear ends of the tensioning cylinder are rotatably connected to the third fixed frame. A servo motor is fixedly installed at the upper end of the fixed post. This structure solves the problems of insufficient fiber breakage prevention effect and inconvenient replacement of the winding drum.

The utility model discloses a quartz fiber yarn tension adjusting device belongs to fiber yarn tension adjusting technical field, solved the problem that the mechanical structure of quartz fiber yarn tension adjusting device in traditional technology will lead to the fiber fracture if tension control is improper, it includes: the yarn and the yarn function of collecting yarn when realizing in the tension adjustment through the first drive motor of base drive's both sides roller on the base, the second drive motor drives the rotation of screw rod, and the screw rod outer cover has the thread ring, because the thread ring is fixedly connected with the slide, so the thread ring can not rotate, but because the slide is connected with the guide rail, the thread ring will replace the force transmission of drive motor and convert into the force along the guide rail direction translation on the screw rod, thereby make the slide and the compression roller frame receive the force of second drive motor, and translate on the guide rail, realize the tension elimination of quartz fiber yarn, realize adjustable effect and realize the full automatic function of the yarn, the yarn and the yarn.

The application discloses a continuous fiber 3D printing corner speed reduction method based on a corner curvature feature, and comprises the following steps: obtaining a 3D printing model, and setting an advance speed reduction distance and a delay speed reduction distance; obtaining point density on a printing path in the 3D printing model, and performing density refinement processing on the printing path with a point density less than a critical density parameter; judging a path meeting a critical condition as a corner or a circular arc, and calculating an optimal printing speed corresponding to the corner path according to structure parameters of the corner or the circular arc and a previously obtained structure parameter and optimal printing speed relationship formula; and printing with advance and delay speed reduction. The application solves the problems of fiber twisting, fiber misplacement and fiber fracture caused by the existing 3D printing process, improves the bonding effect of the continuous fiber path corner, fully plays the effect of the continuous fiber reinforced composite material, improves the continuous fiber printing efficiency and quality, and further improves the mechanical properties of the whole fiber reinforced composite material component.