312 results about "Yarn tension" patented technology

The invention relates to the technical field of spinning quality detection, and discloses a jute spinning product quality detection method and system based on an intelligent sensor. The method comprises the following steps: acquiring real-time process parameters of a jute spinning production line, and synchronously capturing yarn surface temperature field distribution in combination with an infrared thermal imager; performing space-time alignment processing on the yarn tension fluctuation data and the temperature field distribution to generate a fused dynamic process characteristic matrix; according to the tension gradient change rate and the temperature field abnormal region coordinates in the dynamic process characteristic matrix, dividing potential occurrence sections of yarn quality defects; a microstructure image of the yarn in the potential generation section is extracted, a fiber arrangement angle deviation value is measured through a polarized light interferometer, and fiber molecular bond vibration frequency data is obtained in combination with a Raman spectrometer; and inputting the fiber arrangement angle deviation value and the molecular bond vibration frequency data into a cascade quality analysis model, and outputting a quantitative index set of the internal structure defects of the yarns.

The invention belongs to the technical field of textile, and discloses a reinforcement learning and physical modeling combined broken end dynamic capturing method and system. The method comprises the following steps: constructing a yarn microstructure evolution model; inputting real-time environment parameters of the textile workshop into the microstructure evolution model, and predicting to obtain real-time microstructure parameters of the yarn; performing nonlinear coupling feature extraction on the real-time environment parameters, and calculating an environment coupling feature vector; inputting the real-time microstructure parameters as material attributes into a yarn tension dynamical equation, and solving to obtain a predicted yarn macroscopic stress state; splicing the macroscopic stress state of the yarn and the environment coupling feature vector to form a state observation value; the reinforcement learning agent outputs a broken end risk probability value according to the state observation value; and when the broken end risk probability value exceeds a preset threshold value, generating and outputting a broken end early warning signal. According to the invention, early and accurate early warning of yarn breakage in a complex dynamic environment can be realized.

The invention relates to the technical field of automatic control in the textile industry, and discloses an automatic control system of a doffer, which comprises a sensing module, a decision control module, an execution module, an energy consumption management module and a fault monitoring and maintenance module. Through a multi-dimensional data acquisition and intelligent control technology, each link of operation of the doffer can be comprehensively covered, conventional mechanical action execution is concerned, factors such as spindle posture, yarn tension, equipment energy consumption and vibration state are also included, and an intelligent algorithm is deeply integrated to carry out working condition analysis and instruction generation; doffing control can meet production requirements more accurately, and powerful support is provided for efficient development of doffing operation.

The invention discloses a direct untwisted yarn glass fiber warp beam manufacturing process, which comprises the following steps that a single untwisted yarn is manually led out from a creel, sequentially passes through a hole in a yarn guide porcelain plate, a second auxiliary roller, a first auxiliary roller, a raddle and a third auxiliary roller, and is finally connected to a warp beam, and the yarn is ensured not to be wound and crossed in the threading process, so that the untwisted yarn is directly spun. The denting density is consistent with the design of a warp beam, and then tension is set, so that an electronic tension system in a case adjusts the tension of each yarn in real time; a third motor is started to drive the rotating shafts to rotate, the rotating shafts on the two sides and the lead screws synchronously rotate under belt connection, the ball sliding blocks and the limiting barrels are driven to slide along the sliding rails, the distance between the limiting barrels and the warp beam is shortened, and the limiting barrels are attached to the untwisted yarn; meanwhile, the first motor drives the push rod to rotate through the rotating disc, so that the push rod slides along the sliding groove of the sliding groove plate, the push rod and the sley are driven to reciprocate in the horizontal direction, and the untwisted yarn can be evenly wound on the warp beam to avoid accumulation.

The invention relates to the technical field of warp knitting machines, in particular to a yarn tension control system of a warp knitting machine, which comprises an adjusting mechanism, the adjusting mechanism comprises a motor, the output end of the motor is rotatably connected with a first gear, the end face of the first gear is rotatably engaged with a second gear, and the surfaces of the first gear and the second gear are provided with first connecting rods; second connecting rods are rotatably connected to the surfaces of the first connecting rods, third connecting rods are rotatably connected to the surfaces of the second connecting rods, grooves are formed in the side walls of the mounting seats, springs are arranged on the bottom surfaces of the grooves, sliding seats are arranged at the top ends of the springs, and first yarn guide rollers are rotatably mounted on the side walls of the sliding seats. According to the yarn guide roller, the contact area is increased, the pressure on the area is reduced, abrasion and deformation of the yarn caused by too large local pressure are effectively reduced, after the contact area is increased, friction force between the yarn and the first yarn guide roller is distributed more evenly, and the problem of hairiness yarn breakage caused by too large local friction is avoided.

The invention discloses a seamless garment production method with a multi-layer jacquard effect, which comprises the following specific steps: S1, selecting fiber characteristics according to garment purposes, and selecting a spinning process according to the fiber characteristics; s2, designing a multi-layer jacquard pattern by using professional design software, and adjusting the proportion and position of the pattern in combination with a garment model; s3, selecting an electronic jacquard machine or a jacquard machine to weave the multiple layers of jacquard patterns; s4, the patterns are detected in real time in the weaving process, the types, sizes and directions of defects are judged after algorithm analysis, and classification marking is carried out; according to the method, in the weaving process, the tension parameter of the yarn is monitored in real time, the yarn tension is adjusted, the weaving efficiency is guaranteed, meanwhile, flaws in the pattern can be evaluated and classified, the flaws can be rapidly treated conveniently, and the pattern weaving precision is guaranteed.

The utility model relates to the technical field of textile, in particular to a weaving thread tightness adjusting device for a creel, which comprises a weaving frame, a plurality of fixing mechanisms are mounted on the weaving frame, a clamping plate is clamped on the fixing mechanisms, a guide mechanism is fixed on the clamping plate, a bobbin creel is rotatably mounted on the clamping plate, and the bobbin creel is fixed on the bobbin creel. An adjusting mechanism is arranged between the two guide mechanisms and comprises a tension spring and a mounting block, the mounting block and an inserting rod are fixedly connected to the clamping plate, a rotating block is rotationally connected to the inserting rod, a swing rod is fixedly connected to the rotating block, and the tension spring is fixedly mounted between the swing rod and the mounting block; a connecting rod is fixedly mounted at the end part of the swing rod, and a line pressing wheel is rotationally connected to the connecting rod; when the line pressing wheel senses the change of the tension of the weaving line, the swing rod can be driven to rotate, so that the tension spring is in an open or contracted state, and the tightness of the weaving line can be conveniently adjusted.

The utility model provides a yarn tension detection device which comprises an installation frame, two sliding grooves are formed in the installation frame in a spaced mode, lifting seats are arranged in the two sliding grooves in a sliding mode, a tensioning shaft is arranged between the two lifting seats, a tension sensor is installed on one lifting seat, and a tension sensor is installed on the other lifting seat. A tension sensor is installed on the lifting seat, a bearing seat is installed on the tension sensor, one end of the tensioning shaft is movably connected with one of the lifting seats, the other end of the tensioning shaft is movably connected with the tension sensor through a bearing, threaded rods are movably arranged in the two sliding grooves, and the threaded rods penetrate through the lifting seats and are in threaded connection with the lifting seats. The yarn tension adjusting device solves the problem that when a worker observes that the yarn tension does not meet the requirement, the yarn tension cannot be adjusted in time.

The utility model belongs to the field of warping machines, and particularly relates to a warping machine for cotton cloth production, which comprises a warping machine body, a winding mechanism is arranged on the warping machine body, a support plate is fixedly mounted on one side of the warping machine body, a yarn guide mechanism is arranged on the support plate, and a tensioning mechanism is mounted on the warping machine body. The tensioning mechanism is located on one side of the winding mechanism, the wire guide mechanism comprises fixing plates and guide rods, the multiple fixing plates are installed at the top of the supporting plate through a detachable structure, the multiple guide rods are fixedly installed at the tops of the fixing plates at equal intervals, and the tensioning mechanism comprises a fixing frame, a U-shaped plate, a transmission shaft and a tensioning roller. The fixing frame is fixedly installed on the warping machine body, and the U-shaped plate is rotatably installed in the fixing frame through the rotating mechanism. The yarn tension adjusting device is reasonable in design, the uniformity of yarn tension is effectively guaranteed through the tension adjusting mechanism, the quality stability of cotton cloth is improved, and the fixing plates and the corresponding guide rods are convenient to disassemble, assemble and replace.

This utility model relates to the field of textile technology and discloses an adaptive tension control weaving machine, including a worktable. A support column is fixedly connected to the upper surface of the worktable, and a tension control component is provided on one side of the outer wall of the support column. The tension control component includes a slide rail one, which is fixedly connected to one side of the outer wall of the support column. A fixing plate two is fixedly connected to one side of the outer wall of the fixing plate two, and a spring is fixedly connected to one end of the spring. A fixing plate three is fixedly connected to one end of the spring, and a slider is fixedly connected to one side of the outer wall of the fixing plate three. The inner wall of the slider is slidably connected to one side of the outer wall of the slide rail one. In this utility model, adaptive adjustment of yarn tension is achieved. Combined with the elastic effect of the spring, the yarn position can be adjusted. The rotating plate swings according to the yarn tension under the action of the torsion spring, further enhancing the flexibility and adaptability of tension adjustment and avoiding problems such as yarn breakage or uneven weaving caused by uneven tension.

The utility model relates to the technical field of warp knitting machines, in particular to a tensioning mechanism of a warp knitting machine, which comprises a bottom plate, a yarn tensioning mechanism, a yarn breakage detection mechanism, two thread end clamping mechanisms and a control host, and the yarn tensioning mechanism, the yarn breakage detection mechanism, the two thread end clamping mechanisms and the control host are fixedly connected onto the bottom plate. The yarn tensioning mechanism, the yarn breakage detection mechanism and the two thread end clamping mechanisms are all electrically connected with the control host, and the two thread end clamping mechanisms are located on the two sides of the yarn tensioning mechanism respectively; the yarn tensioning mechanism comprises an electric push rod fixedly connected to the upper side of the bottom plate, a piston rod of the electric push rod is provided with a first support, the first support is connected with a first rotating wheel, and the pressure sensor is electrically connected with the control host. According to the utility model, the two ends of the broken part of the yarn body can be automatically clamped and positioned when the yarn body is broken at the yarn tensioning mechanism, so that the phenomenon that the ends of the yarn body are wound on other yarn bodies or other positions of the warp knitting machine is reduced.

The invention discloses a welding system and method for welding a shape memory alloy wire on a locking piece. The system comprises welding equipment, a bending tool, a positioning jig, a tension jig and an upper computer. The upper computer is configured to be used for controlling a bending tool to bend all clamping jaws of the locking piece to a preset angle; the shape memory alloy wire is fixed through a second wire pressing device; after welding of the first welding point is completed, a second wire pressing device is controlled to release the shape memory alloy wire; a winding drum is controlled to wind, so that the shape memory alloy wire drives a load piece to apply a load to the shape memory alloy wire, and the tension of the shape memory alloy wire reaches the tension F of a preset threshold value; and a first wire pressing device, close to the winding drum, in the tension jig is controlled to clamp and lock the shape memory alloy wire, and therefore the tension F is stably kept till welding of the next welding point is completed. The silk yarn tension is controlled through the load piece, so that the silk yarn tension keeps high consistency.

The utility model discloses a tension control device of an automatic winder, and relates to the technical field of tension control, in particular to mounting seats symmetrically mounted at the top of a base, two transmission rollers connected between the two mounting seats, rotating shafts connected to the tail ends of the transmission rollers, mounting frames arranged at the ends of the transmission rollers, and accommodating grooves symmetrically formed in one sides of the mounting frames. The tail ends of rotating shafts of the transmission rollers are connected with fixed seats; an adjusting screw rod is arranged in the containing groove, one end of the adjusting screw rod is rotationally connected with the inner wall of the containing groove, the other end of the adjusting screw rod penetrates through the side wall of the mounting frame and is in threaded connection with the side wall of the mounting frame, the fixing base is located in the containing groove, and the adjusting screw rod penetrates through the fixing base and is in threaded connection with the fixing base; and the second guide rod penetrates through the fixed seat. According to the yarn tension adjusting device, the tension borne by the yarn can be rapidly adjusted, the structure is simple, and the production efficiency of the device can be effectively improved.

The utility model discloses a polyester fiber packing belt yarn separating tooth convenient to adjust tension and roll in a positioning mode, which comprises a bottom plate (1), separating units with the same number as yarns are arranged on the bottom plate (1), each separating unit comprises a support plate (2) fixed with the bottom plate (1), a vertical rotating plate (3) is arranged on the front side of the support plate (2), a spring is arranged between the rotating plate (3) and the support plate (2), and the rotating plate (3) is connected with the bottom plate (1). An upper roller (4) is arranged at the upper end of the rotating plate (3), a lower roller (5) is arranged at the lower end of the rotating plate (3), a rear roller (6) connected with the support plate (2) is arranged on the rear side of the upper roller (4), and rope grooves (7) are formed in the peripheral face of the upper roller (4), the peripheral face of the lower roller (5) and the peripheral face of the rear roller (6). The yarn tension adjusting device has the advantages of being long in service life and capable of adjusting yarn tension to be in a stable state.

The application discloses a mechanical hand coordination device for weaving large-size special-shaped workpiece processing, which comprises a ring weaving machine, a mechanical hand unit and a follow-up support unit, wherein the ring weaving machine is used for weaving the special-shaped workpiece, the special-shaped workpiece mandrel is arranged through the ring weaving machine, and the mechanical hand unit and the follow-up support unit are arranged on both sides of the ring weaving machine respectively and are used for clamping the two ends of the special-shaped workpiece mandrel. The large-size special-shaped workpiece is clamped by the mechanical hand unit and the follow-up support unit, the support and feeding of the large-size special-shaped workpiece during the weaving process are realized, the position of the special-shaped workpiece mandrel in the vertical direction is adjusted according to the shape of the special-shaped workpiece, the weaving position of the special-shaped workpiece mandrel is ensured to be always located at the center of the ring weaving machine, the consistency of the yarn tension of the special-shaped workpiece mandrel in all directions during the weaving process is improved, and the weaving quality is improved.

The invention discloses a yarn feeding system, which is applied to a flat knitting machine and comprises a traction mechanism for pulling yarns, a yarn nozzle for guiding the yarns sent out by the traction mechanism and supplying the yarns to a yarn bed, a main buffer piece arranged close to the downstream of the traction mechanism, and an auxiliary buffer piece arranged close to the upstream of the yarn nozzle, the main buffering piece and the auxiliary buffering piece are each provided with a yarn guiding part for guiding the yarn to pass through, and the yarn guiding parts of the main buffering piece and the auxiliary buffering piece apply upward lifting tension force to the yarn passing through the yarn all the time. The invention further discloses the flat knitting machine with the yarn feeding system. The method has the beneficial effects that the problem of yarn tension control lag is solved, the system response speed is increased, and the yarn supply stability and accuracy under the high-frequency switching knitting working condition are ensured.

This utility model provides a control mechanism for adjusting yarn tension, relating to the field of yarn tension. The control mechanism includes: a mounting shell, comprising outer shell A and outer shell B. An adjustment component is disposed in the middle of the inner wall of the mounting shell, and the inner wall of a roller is sleeved on the surface of an adjustment rod body. In this utility model, an actuating cylinder drives a mounting block, causing the adjustment rod body embedded in the inner wall of the mounting block to rise and fall. This allows the roller mounted on the surface of the adjustment rod body to adjust the yarn tension. The roller changes the sliding friction of the yarn to rolling friction during tension adjustment, effectively preventing damage to the yarn caused by friction. By unscrewing the fixing bolts securing outer shell A and outer shell B, outer shell A and outer shell B can be disassembled, allowing the adjustment rod body to be pulled out of the mounting block for convenient and quick disassembly and replacement.

The utility model relates to the technical field of warp knitting machines, in particular to a self-adaptive yarn tension adjusting knitted fabric warp knitting machine transverse moving mechanism which mainly comprises a transverse moving adjusting frame, the bottom end of the inner side of the transverse moving adjusting frame is connected with a bobbin, a needle set is arranged at the top end of the transverse moving adjusting frame, and a positioning sliding strip is installed at the front end of the transverse moving adjusting frame. An adjusting block is arranged at the front end of the positioning sliding strip, and a contact piece is arranged at the front end of the adjusting block. According to the self-adaptive yarn tension adjusting knitted fabric warp knitting machine transverse moving mechanism, when yarn is conveyed in the stranding process, the contact area with equipment is large, friction force is relatively large, inner side abutting supporting is conducted through the contact pieces, longitudinal tension can be eliminated through elastic connection of the connecting elastic pieces on the inner side, and the yarn tension adjusting effect is good. The elastic guide rods on the two sides can adjust the position of the adjusting block within a certain range, tension extrusion of the side edges is adjusted, the tension adjusting effect is improved in the using process, and the influence of yarn breakage on the equipment machining efficiency is reduced.

The utility model relates to the technical field of knitting machines, in particular to an anti-loosening device of a knitting machine for producing large-eyelet breathable socks, which comprises a machine body plate and is characterized in that a machine frame plate is arranged on one side of the machine body plate, a pattern chain wheel is arranged on the machine frame plate, a chain wheel shaft is arranged at one end of the pattern chain wheel, and a chain wheel is arranged on the chain wheel shaft. A plurality of sets of swing levers are arranged on one side of the pattern chain wheel, a supporting rod is arranged at one end of each swing lever, a sparse joint is connected to one end of each supporting rod, a plurality of sets of comb section transverse moving mechanisms are arranged on the sparse joints, and a needle bed mechanism is arranged below the comb section transverse moving mechanisms. A radial connecting rod and a Y-shaped frame of the comb section transverse moving mechanism ensure accurate positioning of the yarn, the yarn is positioned and then looped through cooperative control over the phase difference of 90-120 degrees, and a one-way ratchet wheel prevents mechanical rollback. The yarn tension is balanced through the symmetrical sparse joint design, the high-strength stainless steel connecting rod keeps the movement precision, and the adjustable knocking-over bar adapts to different production requirements.

The utility model provides an elastic yarn tension compensation mechanism, which relates to the technical field of shuttle looms and comprises two mounting racks, first mounting grooves are symmetrically arranged in the mounting racks, second mounting grooves are arranged at the bottoms of the first mounting grooves, bearing bodies are mounted at the bottoms in the second mounting grooves, belt pulleys are connected to the tops of the bearing bodies, and screw rods are fixed to the tops of the belt pulleys. A pressure sensor is arranged at the inner bottom of a third mounting groove, when the tension compensation roller is subjected to yarn tension, pressure is transmitted to the pressure sensor through a mounting seat and a sliding pressure applying block, and the pressure is transmitted to the pressure sensor through the pressure sensor. And the tension sensor is electrically connected with a controller integrated with a PLC control module, so that real-time accurate tension detection and'detection-feedback-control 'closed-loop automatic adjustment are realized.

The utility model relates to the field of electronic yarn detection, and discloses an electronic yarn tension detection device which comprises a support, a tension detection unit and a yarn length detection unit. The support is provided with a hanging strip used for hanging a spool. The support is provided with an adjusting module used for adjusting the distance between the hanging strip and the tension detection unit. The yarn length detection unit is arranged on one side of the support. The tension detection unit is placed on the yarn length detection unit and is connected with one end of the adjusting module; the yarn length detection unit is used for winding the yarn on the spool and measuring the winding length of the yarn; the tension detection unit is used for measuring the tension of the yarn in the yarn winding process of the yarn length detection unit. The detection device can quantitatively detect and analyze the tension and the stability of the electronic yarn.

The invention provides production equipment and a production process of high-elastic cotton-conditioning comfortable quick-drying chemical fiber knitted fabric, the production equipment comprises a knitting device for knitting gray fabric, an after-finishing device for performing functional finishing on the gray fabric and a finished product winding device which are connected in sequence, the knitting device comprises a rack, a yarn conveyor and a knitting mechanism, the yarn conveying device and the knitting mechanism are both arranged on the machine frame, a tension adjusting mechanism is arranged between the yarn conveying device and the knitting mechanism, and the tension adjusting mechanism comprises a distribution shaft, a plurality of adjusting cams coaxially installed on the distribution shaft and tension executing rods in abutting contact with the adjusting cams. The tension executing rod is provided with a yarn guide hook used for allowing yarn to penetrate through. A mechanical structure is adopted, yarn tension can be adjusted synchronously with a knitting mechanism, and therefore the different tension requirements of different areas of a cloth cover are met.

The utility model relates to a textile yarn tension adjusting mechanism, which belongs to the technical field of textile equipment and comprises a bottom plate, yarn bypasses a limiting roller and a tension adjusting roller, when yarn tension needs to be adjusted, a transmission motor is started to drive a screw rod to rotate, and a movable seat in threaded connection with the screw rod can axially move along the screw rod, so that the position of the tension adjusting roller is changed; in the yarn running process, if the tension suddenly changes, the self-adaptive elastic floating assembly plays a role, when the yarn tension suddenly increases, the tension adjusting roller is subjected to tension, the moving block is driven to move in the moving seat, through cooperation of the buffer damper and the telescopic spring, the buffer damper absorbs part of impact force, and the yarn tension is adjusted. The telescopic spring provides buffering elastic force, so that the tension adjusting roller can adjust the position in a self-adaptive mode, breakage of the yarn due to too large tension is avoided, and if the tension is suddenly reduced, the telescopic spring rebounds, the tension adjusting roller is pushed to reset, and the yarn tension is kept stable.

The invention relates to the technical field of sewing machines, in particular to a multi-thread-trapper thread tension adjusting device which is characterized in that a driving motor drives a rotating shaft to rotate; the plurality of adjusting mechanisms are arranged in one-to-one correspondence with the adjusting nuts of the plurality of wire trappers; the adjusting mechanism comprises a friction wheel arranged opposite to the adjusting nut, a transmission piece connected with the rotating shaft and the friction wheel so as to drive the friction wheel to rotate, and a clutch piece connected with the friction wheel and driving the friction wheel and the adjusting nut to be pressed or not pressed. The invention further relates to a multi-yarn-trapper yarn tension adjusting method which adopts the device and comprises automatic adjustment and manual adjustment. The automatic adjustment is that the adjusting nuts of all the wire trappers or one or more of the wire trappers are compressed with the friction wheel, the driving motor drives the friction wheel to rotate through the rotating shaft and the transmission piece, and the friction wheel compressed with the adjusting nuts drives the adjusting nuts to rotate; the manual adjustment is that the adjusting nut of the wire clamp and the friction wheel are not tightly pressed, and the adjusting nut is manually rotated. Automatic synchronous or independent adjustment of the tension of the multi-thread-trapper thread can be achieved.

The invention relates to the technical field of handicraft knitting equipment, in particular to a handicraft knitting machine and a using method thereof.The handicraft knitting machine comprises a base, a transverse guide rail assembly, a longitudinal sliding frame, an adjustable knitting head set, a yarn supply module and a man-machine cooperative control unit; the position, angle and tension of each knitting head unit can be independently adjusted, gesture recognition and tactile feedback are supported, and dynamic adaptation to various techniques such as crocheting, bar knitting, tassels and three-dimensional knotting is achieved. The yarn tension, the insertion angle and the rhythm can be monitored and adjusted in real time, irregular patterns and free creation are supported, and core features of handicrafts are reserved.

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 invention discloses a composite braid capable of improving splicing ridge position difference, which comprises a braid main body, the braid main body comprises an upper-layer braid body and a lower-layer braid body, and the width of the upper-layer braid body is smaller than that of the lower-layer braid body, so that a splicing area with height is formed between the upper-layer braid body and the lower-layer braid body; the height of the splicing area is the height difference between the upper surface of the upper-layer belt body and the upper surface of the lower-layer belt body, the two sides of the splicing area in the length direction are each provided with at least one chain stitch layer, the splicing area is provided with at least one weft insertion stitch layer, and the weft insertion stitch layers transversely penetrate through the splicing area in the width direction of the splicing area; the weft insertion weave layer is connected with the chaining weave layers on the two sides of the splicing area, and the splicing area is wrapped in a flattening mode through yarn tension of the weft insertion weave layer, so that the splicing area inclines from the upper-layer belt body to the lower-layer belt body to form a slope transition structure. By means of the method, the ridge position difference after splicing is improved, better close-fitting comfort is provided, meanwhile, the surface of the braid is smoother, and the appearance is more attractive.

The utility model discloses a jacquard knitting silk yarn stretching device which comprises a base, traction mechanisms are arranged at the front end and the rear end of the top end of the base, a stretching mechanism is arranged in the middle of the top end of the base and located between the traction mechanisms on the two sides, and the stretching mechanism comprises a stretching frame and a rotating disc. The middle of the stretching frame is connected with a rotating shaft, the rotating shaft is rotationally assembled on a rotating disc, a clockwork spring connected with the rotating shaft is arranged in the rotating disc, the two sides of the top end of the stretching frame are provided with a first stretching rod and a second stretching rod respectively, and the first stretching rod and the second stretching rod are each rotationally provided with a wire guide wheel. Dynamic tension control can be achieved, and full-process self-adaptive compensation of silk yarn tension is achieved through the synergistic effect of the clockwork spring and the elastic traction mechanism in combination with the sliding adjusting function of the silk yarn guiding mechanism.

This utility model discloses a yarn frame tension control mechanism for a carbon fiber spreading and warping machine, including a yarn frame and several yarn bobbins, as well as a yarn bobbin support frame, a support frame mounting base, a magnetic powder brake, and a rotating shaft. One end of the rotating shaft passes through the rotor of the magnetic powder brake and is interference-fitted to the rotor or connected via a keyway key block structure. The front cylinder of the support frame is fitted onto the other end of the rotating shaft, and the yarn bobbins are mounted on the front cylinder of the support frame. The rear cylinder of the mounting base is fitted onto the shaft body and fixedly connected to the shaft body by a first set screw. The rear cylinder of the support frame is inserted into the inner hole of the front cylinder of the mounting base, and the two are fixedly connected by a second set screw. A guide roller is provided at the unwinding point of the carbon fiber yarn on each yarn bobbin, and a pressure sensor is installed at one or both ends of the guide roller. This utility model allows each yarn bobbin to be controlled individually, enabling adjustment of the carbon fiber yarn tension at the unwinding point of each yarn bobbin, ensuring that the carbon fiber yarn tension at the unwinding point of each yarn bobbin meets the process requirements.

The application discloses a short yarn conveying automatic yarn laying system dynamic process tension control method and device, belongs to the technical field of automatic prepreg tow laying, and comprises the following steps: a mechanical equilibrium equation group considering the gravity of a floating part, friction between the floating part and a guide rail and an 'inertia force' caused by acceleration is established, real-time yarn tension is solved, and equivalent deformation of a tension spring is calculated based on the yarn tension. The torque of a hysteresis device is adjusted and the tow tension is controlled by comparing the equivalent deformation of the tension spring and the deformation of the tension spring at a balanced position. The tow tension calculated by the scheme has high precision, and the tension control precision of the short yarn conveying automatic yarn laying system dynamic process is improved.