456 results about "Yarn tension" patented technology

The invention discloses monofilament prepreg yarn dry-method winding equipment and a tension control method, and relates to the technical field of composite material forming, the monofilament prepreg yarn dry-method winding equipment comprises an unwinding yarn box, a yarn roll is connected with a driving motor and used for outputting yarn, the yarn is wound on a hook leg buffer mechanism after being led out of the yarn roll, and the hook leg buffer mechanism is used for adjusting the tension of the yarn; a main shaft is rotatably arranged on the gantry frame in the length direction, and a mold is arranged on the main shaft; the moving trolley is in sliding connection with the gantry frame in the length direction of the gantry frame, the moving trolley is provided with a yarn winding nozzle, the yarn winding nozzle corresponds to the mold, and the yarn enters the yarn winding nozzle after being led out of the hook leg buffering mechanism and is wound on the mold. According to the invention, high-speed automatic winding of monofilament prepreg yarns can be realized, the automation degree is high, and the production efficiency is improved. The yarn tension output by each yarn roll is independently adjusted based on the tension after stranding, the control precision of the yarn tension is improved, the tension is kept stable, and therefore the yarn winding quality is improved.

The invention relates to the technical field of heald frame self-adaptive control, and discloses a spinning heald frame self-adaptive control system and method.The spinning heald frame self-adaptive control system comprises a sensor set used for collecting heald frame displacement, yarn tension and fabric surface state data in real time and generating heald frame state data, and the input end of a defect detection module is connected with the sensor set; receiving the checked yarn tension and fabric surface state data, performing defect detection on the fabric surface state data, generating a suppression signal for abrupt change of heald frame acceleration according to correlation analysis of a fabric state rating signal and real-time displacement, dynamically deciding and receiving a defect identification result, querying a defect type mapping table, and determining whether the defect type mapping table is abnormal or not. According to the method, a control parameter forced priority sequence is determined, weft errors and tension changes on the surface of the fabric are judged, self-adaptive adjustment of the spinning heald frame through weaving state detection is achieved, and weaving accuracy is improved.

The invention relates to the field of textile control, in particular to a tension control method and system of a high-speed loom. The method comprises the following steps: firstly, obtaining the tension fluctuation degree of each moment according to the tension data difference of the loom at each moment and the tension data distribution of each moment in a preset time domain of each moment, clustering all moments to obtain a first cluster, and obtaining the tension fluctuation degree of each moment according to the tension data distribution of each moment in each first cluster; the method comprises the steps of obtaining a change state value of each first clustering cluster according to the tension fluctuation degree of each first clustering cluster and the difference of the tension fluctuation degree of each first clustering cluster at each moment, further clustering all the first clustering clusters to obtain second clustering clusters, and obtaining the tension change degree of the loom according to the position distribution of each first clustering cluster in each second clustering cluster. And performing PID control on the loom according to the deviation condition of the tension data of the loom at the current moment and the tension change degree. The control effect on the yarn tension of the high-speed loom can be improved.

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 relates to the field of warp knitting machines, in particular to a weft selecting trolley with a yarn tension adjusting function, which comprises a weft selecting trolley unit and can monitor the tension state of yarns in real time by arranging a capacitive proximity switch: when the yarns are loose, the capacitive proximity switch does not send out a signal, a system automatically triggers a tension adjusting mechanism, and the tension state of the yarns is adjusted; the assembly mounting plate is pulled through the driving mechanism to ensure that the yarn is always in a tensioned state, the yarn loosening phenomenon in the weft laying process is effectively avoided, the tensioning of the yarn can be automatically adjusted, all the yarn clamping units can be controlled through the adjusting unit to clamp the yarn, and the yarn laying efficiency is improved. Synchronous work of yarn clamping of the clamping assemblies and the capacitive proximity switch is achieved through the adjusting piece, single adjustment of the single assembly mounting plate in the yarn clamping state can be achieved through cooperation of the adjusting piece and the guide frame, the synchronous adjusting plate drives the clamping assemblies on the two sides to synchronously move through the limiting sliding grooves, and it is guaranteed that clamping force is evenly distributed; yarn deviation or distortion is avoided, and weft laying quality is improved.

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 carbon fiber prepreg cloth production, and discloses a low-gram-weight yarn spreading device for carbon fiber prepreg cloth, which comprises a rack, and a modular yarn releasing unit, a hot roller yarn spreading unit and an airflow auxiliary yarn spreading unit which are arranged on the rack, the hot roller yarn spreading unit comprises at least three hot roller groups, the airflow auxiliary yarn spreading unit comprises an airflow nozzle assembly and an airflow buffer plate which are oppositely distributed up and down, the airflow nozzle assembly sprays airflow and is used for transversely pushing away fibers to assist yarn spreading, and the airflow buffer plate releases the airflow to form an air cushion to buffer yarn tension fluctuation. According to the low-gram-weight yarn spreading device for the carbon fiber prepreg cloth, the hot roller yarn spreading unit and the airflow auxiliary yarn spreading unit cooperate, efficient yarn spreading is achieved, meanwhile, the airflow buffer plate releases low-pressure airflow, an air cushion is formed, tension fluctuation is absorbed, and the yarn breaking rate is reduced.

The utility model relates to the technical field of tension regulators, in particular to a traditional spinning yarn tension regulator, which is characterized in that a yarn main body is pulled by a traction device to slide along a quartz wheel and three yarn wheels in sequence, and in the process, the quartz wheel and the three yarn wheels apply pressure to the yarn main body from different angles; when the yarn inlet end is clamped, the yarn body in the adjusting device can be tensioned, the tensioned yarn body can apply pressure to the yarn wheel, the yarn wheel can apply pressure to the spring through the sliding block, the spring is shrunk, the tensile force borne by the yarn body is converted into the elastic force of the spring, and the yarn body is tensioned. Meanwhile, the bent yarn main body can be straightened, more yarn main bodies are released, the length pulled by the traction device is supplemented, the tensile force borne by the yarn main body is shared through the yarn wheel capable of sliding, and the effect that the yarn main body is prevented from being snapped by the traction device due to the fact that the yarn inlet end is clamped is achieved.

The invention discloses a warp rebeaming machine unwinding device with a tension adjusting device and a using method thereof.The warp rebeaming machine unwinding device comprises a creel, a warp fixing frame is fixedly installed on the creel, a warp beam is rotatably installed on the warp fixing frame, a yarn guide arrangement plate is fixedly installed on the creel, a winding shaft is rotatably installed on the creel, and a tension adjusting device is installed on the winding shaft. A tension balancing mechanism located between the yarn guide row plate and the winding shaft is installed on the creel, a winding motor is fixedly installed on the creel, and an output shaft of the winding motor is fixedly connected with the winding shaft. According to the warp yarn rebeaming device, when the tension of the inlet yarn changes due to factors such as environment or warp yarn, the supporting capacity of the dynamic tension wheel is adjusted in real time, the tension of the warp yarn is kept constant, and the problem that the tension of the yarn is unstable, so that the tension of the warp yarn is not uniform after rebeaming is solved; the reaction to tension change is more sensitive and reliable, and the winding quality after warp rebeaming is balanced and stable.

The invention relates to the technical field of spinning. The invention relates to a yarn twist control method and device, computer equipment and a storage medium, and the method comprises the steps: obtaining yarn type information, setting target twist information according to the yarn type information, setting a forward twist value and a reverse twist value according to the target twist information, monitoring the tension change of the yarn in the twist change process in real time, and controlling the twist of the yarn according to the tension change. Yarn tension information is obtained, the yarn tension information, the forward twist value and the reverse twist value are input into the trained twist and tension relation model, an output result of the twist and tension relation model is obtained, and twist parameters of the yarn are dynamically adjusted according to the output result of the twist and tension relation model. The device has the effect of improving the yarn quality and the production efficiency.

The invention discloses a yarn conveying method, device and system, a storage medium and a dyeing and embroidering system. The yarn conveying method comprises the steps that the real-time yarn feeding length and the set yarn feeding length of the current needle sequence are obtained; determining a yarn feeding deviation value based on the real-time yarn feeding length and the set yarn feeding length; using the yarn feeding deviation value to determine the candidate yarn feeding length of the next needle sequence adjacent to the current needle sequence; the current tension of the yarn is obtained, and the candidate yarn feeding length is adjusted based on the current tension so as to obtain the target yarn feeding length for the rear needle sequence. According to the yarn feeding method and device, the deviation is made between the real-time yarn conveying amount and the set amount, the yarn feeding amount is dynamically adjusted on the basis of the deviation and the current yarn tension, feedback data of the dyeing equipment and feedback data of the weaving and embroidering equipment can be linked, and accurate yarn feeding is achieved.

The utility model relates to the technical field of yarn adjustment, in particular to a warp knitting machine yarn tension self-adaptive adjusting mechanism which comprises a main machine body, the main machine body can be installed on a warp knitting machine and used for adjusting yarn tension, and a tension adjusting system capable of adjusting the yarn tension is arranged in the center of the main machine body. The tension adjusting system comprises a plurality of tension fine adjustment assemblies capable of finely adjusting yarn and an adjusting assembly used for driving the tension fine adjustment assemblies to rotate, and further comprises a rotating assembly arranged on the main machine body and used for driving the tension fine adjustment assemblies and the adjusting assembly to move. The rotating assembly comprises two rotating plates rotationally arranged on the main machine body. Through the synergistic effect of the tension fine adjustment assembly, the adjusting assembly and the rotating assembly, the yarn tension adjusting device can adjust the tension of yarn in a self-adaptive mode, and is simple in adjusting structure and rapid in adjustment.

The invention relates to the technical field of yarn tension detection, in particular to a textile yarn tensile property detection device with a multi-section detection function, which comprises a rack and a stretching frame, and a plurality of mounting frames are arranged on the rack; a detection mechanism is arranged on each mounting frame, a clamping assembly is arranged on each detection mechanism, and a detection unit is arranged on each clamping assembly; through the arrangement of the multiple mounting frames and the detection mechanisms, multi-section synchronous detection can be achieved on the same yarn, it is not needed to repeatedly cut and clamp the yarn in the prior art, the manual operation amount is greatly reduced, and the detection efficiency is remarkably improved. Every two adjacent detection mechanisms are distributed in a bilateral symmetry mode with the yarn as the symmetry axis and move synchronously and relatively, it is ensured that the yarn is evenly divided into a plurality of independent detection sections with the same length, the overall tensile property and uniformity of the yarn can be evaluated more comprehensively and accurately through comprehensive analysis of data of the multiple detection sections, and the yarn quality is improved. And local weak links can be found in time.

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 utility model discloses a yarn tension linear change control mechanism and a bobbin winder and relates to the technical field of textile instruments. The yarn tension linear change control mechanism comprises a yarn clamping assembly and a yarn tension control assembly, the yarn clamping assembly comprises a support, a fixed clamping piece, a movable clamping piece, a weight applying piece and a first connecting rope, the fixed clamping piece is fixed to the support, the movable clamping piece is rotatably installed on the support, and the weight applying piece is connected with the movable clamping piece through the first connecting rope; the tension adjusting assembly comprises a swing arm, a supporting piece, a rope wheel and a second connecting rope, the swing arm can rotate around the middle of the swing arm, the supporting piece and the rope wheel are installed at the two ends of the swing arm respectively, the supporting piece supports the first connecting rope, the rope wheel is connected with one end of the second connecting rope, and the other end of the second connecting rope is used for being connected with a cradle arm connected with the end of the winding spool. During working, the transverse component force of the weight applying piece on the movable clamping piece is linearly reduced along with the increase of the winding diameter of the yarn on the winding yarn drum, and the effect that the tension of the yarn is linearly reduced is achieved.

The invention discloses a device and process of controlling / stabilizing tension in a filament / monofilament, flat / fibrillated tape or yarn while winding it on a core in a winding machine. More particularly, it discloses a multistage tension control device to precisely control the tension in winding of low denier yams as low as up to 15 denier or so. The initial stage of the device has a stabilization roller unit (1) and the last stage comprises a moving arm mechanism (7). The stabilization roller unit (1) comprises a yarn aligner support (4), a positively driven accumulator roller (3), a stabilization roller (2). The moving arm mechanism comprises a moving guide wheel (8), a moving arm (9), a pivot pin (14), a moving arm stopper (12), an exit guide wheel (10), a low friction cylinder (16), and a balance weight (15). The device and the process of invention improves the bobbin quality.

The utility model relates to the technical field of textile equipment, in particular to an intelligent creel device. The yarn creel comprises a creel main body, and a plurality of yarn bobbins for winding yarns are arranged on the creel main body. In the using process of the yarn creel, a plurality of yarn bobbins wound with yarns are placed on the yarn creel body, the yarns pass through the yarn guide holes of the parallel unwinding plate and downwards pass through the multi-head yarn guide tension control assembly, yarn guide is conducted through the multi-head yarn guide tension control assembly, and then the tension of the yarns is controlled through the tension gate structure. According to the device, the tension of multiple strands of yarns is controlled at the same time, then the yarns are guided through the multi-head yarn guiding and breaking detection structure, and whether the multiple strands of yarns are broken or not is monitored in real time through the yarn detection structure in the downward direction. The device can control the tension of the multiple strands of yarns and monitor whether the multiple strands of yarns are broken or not at the same time; the problem that the tension and the yarn breaking condition of single-strand yarn can only be controlled through a single gate and a single yarn detector is solved, efficiency is greatly improved, and practicability is high.

The utility model belongs to the technical field of textile machinery, and relates to an automatic winding machine. The winding machine comprises a winding machine main frame, a material pipe feeding disc is arranged on the winding machine main frame, a material pipe vertical frame used for vertically arranging and fixing a plurality of material pipes is arranged at the tail of the material pipe feeding disc, and a multi-station electronic yarn guide device is arranged on the winding machine main frame. The multi-station electronic yarn guide device comprises a fixing support, a main shaft support and a tailstock support, and the main shaft support is provided with a plurality of yarn bobbin main shaft units capable of rotating synchronously and a winding motor set used for driving the yarn bobbin main shaft units to rotate. The tailstock support is provided with a yarn bobbin jacking structure capable of doing reciprocating rectilinear motion along the end close to or away from the yarn bobbin main shaft unit. According to the utility model, full-automatic design is adopted, automatic material preparation, feeding, material clamping, multi-head synchronous yarn guiding, multi-strand yarn tension control and multi-strand yarn breakage monitoring are realized, the labor intensity of workers is greatly reduced, and the production efficiency is improved.

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 discloses an active tension compensation device of a warp knitting machine. The active tension compensation device comprises an encoder (1), a rotating shaft (2) and a controller (3), the detection end of the encoder (1) is connected with a main shaft (4) of the warp knitting machine, and the signal end of the encoder (1) is connected with the controller (3); the rotating shaft (2) is connected with a raddle (5), an elevated plate (6) and a spring piece (7), the rotating shaft (2) is rotationally connected with a rack of the warp knitting machine, the rotating shaft (2) is connected with a driving mechanism, and the driving mechanism is connected with the controller (3); the signal input end of the servo driver (10) is connected with the controller (3), the servo motor (11) is connected with the servo driver (10), the output end of the servo motor (11) is provided with a worm (12), the worm (12) is connected with a worm gear (13), and the worm gear (13) is connected with the rotating shaft (2). The utility model has the advantages that the warp tension can be kept stable, and the water ripples on the fabric can be eliminated.

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.