CN109457369B - Weft yarn clamping mechanism - Google Patents
Weft yarn clamping mechanism Download PDFInfo
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- CN109457369B CN109457369B CN201811379980.5A CN201811379980A CN109457369B CN 109457369 B CN109457369 B CN 109457369B CN 201811379980 A CN201811379980 A CN 201811379980A CN 109457369 B CN109457369 B CN 109457369B
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
- D03D47/12—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein single picks of weft thread are inserted, i.e. with shedding between each pick
- D03D47/20—Constructional features of the thread-engaging device on the inserters
- D03D47/23—Thread grippers
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Abstract
The invention discloses a weft yarn clamping mechanism which comprises a belt conveyer, clamping rods and a pressing block, wherein the belt conveyer is fixedly arranged on a support of a weft insertion mechanism and is provided with a circular belt capable of rotating circularly; the clamping rod comprises a straight rod-shaped rapier, two ends of the rapier are respectively formed into a clamping end and a tail end, an inner cavity is formed at the clamping end of the rapier, an opening is formed in the end face of the clamping end of the inner cavity, an air cylinder is installed in the inner cavity, and a chuck is installed at the opening of the inner cavity; the chuck comprises two oppositely arranged clamping jaws, and when the piston rod moves, the clamping jaws can be driven to rotate, so that the occlusion ends of the two clamping jaws are abutted together. The mechanism can be connected into an automatic control system, and the production efficiency is effectively improved.
Description
Technical Field
The invention relates to a 2.5D preform weft yarn clamping mechanism, which is used for a 2.5D automatic knitting machine and belongs to the technical field of knitting.
Background
The 2.5D weaving manufacturing molding is a novel weaving technology, yarn bundles are distributed along two mutually vertical directions of a warp direction and a weft direction in a three-dimensional space and are mutually interwoven to form an integral structure, particularly, a composite material member made of the composite material member serving as a reinforcement has the advantages of light weight, high strength, excellent mechanical property and the like, is widely applied to various fields such as aerospace, national defense and military industry, transportation, energy and the like at present, and is continuously expanded to the civil field.
The 2.5D weaving equipment is shown in fig. 1, which is a basic manufacturing schematic of 2.5D weaving. In the manufacturing process, a warp yarn bundle 1 is led out from a creel 2, penetrates through a heddle eye 4 of a heddle connected with a harness cord 3 according to a certain rule, penetrates through a reed 5 and is clamped by a clamp 6; the opening device 8 controls the lifting of the heddle eyes 4 to enable the warp yarn bundles 1 to form a plurality of sheds; the weft feeder 7 draws the weft yarn through the shed; after weft insertion, the reed 5 pushes the weft yarns to a cloth fell; the pulling-off mechanism pulls out the formed preform, forming a manufacturing cycle.
In the weaving process, the drawing of the weft yarns is mainly manually and auxiliarily carried out by using a simple tool, so that the production efficiency cannot be effectively improved.
Disclosure of Invention
The invention aims to overcome the defects and provides a weft yarn clamping mechanism which can be connected into an automatic control system to effectively improve the production efficiency, and the specific technical scheme is as follows:
a weft yarn clamping mechanism is used for clamping and drawing weft yarns and is installed on a weft insertion mechanism of a 2.5D knitting machine, the 2.5D knitting machine is provided with a weft selecting mechanism arranged at an interval with the weft yarn clamping mechanism, the weft yarn clamping mechanism comprises a belt conveyer, a clamping rod and a pressing block, the belt conveyer is fixedly installed on a support of the weft insertion mechanism, the belt conveyer is provided with a circular belt capable of rotating circularly, the clamping rod is arranged on the belt of the belt conveyer, the pressing block is rotatably installed on the support, and the clamping rod is pressed on the belt by the pressing block; when the belt rotates, the clamping rods can be driven to reciprocate along the extending direction of the weft yarns;
the clamping rod comprises a straight rod-shaped rapier, two ends of the rapier form a clamping end and a tail end respectively, and the clamping end faces the weft selecting mechanism of the 2.5D knitting machine; an inner cavity is formed at the clamping end of the rapier, an opening is formed in the end face of the clamping end of the inner cavity, an air cylinder is fixedly installed in the inner cavity, and a clamping head is installed at the opening of the inner cavity;
the chuck comprises two jaws which are arranged oppositely, each jaw is provided with an installation end and an engagement end which is arranged opposite to the installation end, each jaw is rotatably installed on the side wall of the inner cavity through the installation end, and a piston rod of the air cylinder is clamped on the installation ends of the jaws; when the occlusion ends of the two claws abut against each other, the weft yarn can be clamped;
when the piston rod moves, the clamping jaws can be driven to rotate, so that the occlusion ends of the two clamping jaws are abutted together;
the belt conveyer also comprises a driving wheel rotatably mounted on the support, a driven wheel and a servo motor for driving the driving wheel to rotate, and the belt is encircled on the driving wheel and the driven wheel.
In the invention, the servo motor and the air cylinder of the belt conveyer can be connected into the automatic control system, and the automatic control system is adopted to move all the parts, so that the traction of weft yarns is automatically controlled, and the production efficiency is improved.
The positive and negative rotation and the rotation speed of the servo motor can be controlled conveniently, so that the moving speed of the clamping rod is controlled by controlling the servo motor when the weft selecting mechanism works, the piston rod of the air cylinder can smoothly drive the clamping jaws of the clamping head to open and close by synchronously controlling the air source of the air cylinder, weft yarns are pulled, and the arrangement of the weft yarns is completed under the matching of the weft selecting mechanism.
Furthermore, all be provided with first tooth at the installation end of every jack catch, the cylinder is installed in the one side of the tail end of the arrow shaft of the orientation of jack catch, and the piston rod of cylinder extends and can stretch out towards the direction of jack catch along the axis direction of arrow shaft, is formed with the drive end on the piston rod, is provided with the second tooth that meshes with above-mentioned first tooth on this drive end.
Preferably, the cross section of the first tooth along the length direction of the rapier is in a sawtooth shape, and the first tooth is provided with a first tooth socket extending along the length direction vertical to the rapier; the cross section of the second tooth along the length direction of the rapier is in a sawtooth shape, and the second tooth is provided with a second tooth socket extending along the length direction perpendicular to the rapier.
The adoption of the tooth structure can reliably utilize the piston rod of the air cylinder to control the opening and closing of the claw, thereby completing the clamping and releasing of the weft yarn and completing the traction of the weft yarn.
Further, four chuck working positions are sequentially arranged between the belt conveyer and the weft selecting mechanism, and are sequentially as follows: the starting point of the chuck is A1 bit, the retreating point of the chuck is B1 bit, the opening point of the chuck is C1 bit and the closing point of the chuck is D1 bit; the weft selecting mechanism is provided with a first pressing plate for pressing weft yarns;
before the operation starts, the chuck is positioned at a chuck starting point A1 to stand by, when the operation is performed, the clamping rod starts to move under the drive of the belt conveyer, firstly, the chuck moves from the chuck starting point A1 to a chuck opening point C1 and opens, the clamping rod continues to move towards the direction of the weft selecting mechanism, so that the chuck reaches a chuck closing point D1 and closes, in the process that the chuck moves from the chuck opening point C1 to a chuck closing point D1, a first pressure plate of the weft selecting mechanism is loosened, weft yarns are clamped by two clamping jaws of the chuck, then a belt of the belt conveyer is reversely rotated, so that the clamping rod moves towards the direction far from the weft selecting mechanism, the weft yarns move towards the direction far from the weft selecting mechanism under the drive of the chuck, and when the chuck moves to a chuck withdrawing point B1, the movement of the clamping rod is stopped, so that the chuck is kept at a chuck withdrawing point B1;
then closing a first pressure plate of the weft selection mechanism, fixing one end of the weft, starting the belt conveyer again, enabling the clamping rod to move continuously in the direction away from the weft selection mechanism and enabling the clamping head to reach the position A1 of the starting point of the clamping head, tensioning the weft and fixing the other end, and cutting off the weft to finish the traction of one weft;
and repeating the process to finish the traction of the needed weft yarns.
Preferably, the moving speed of the chuck moving from the chuck starting point A1 to the chuck opening point C1 is V1,
the moving speed of the chuck moving from the chuck opening point C1 position to the chuck closing point D1 position is V2,
the moving speed of the chuck moving from the chuck closing point D1 to the chuck withdrawing point B1 is V3,
the moving speed of the chuck moving from the chuck withdrawing point B1 to the chuck starting point a1 is V4,
V4＜V1，V4＜V2，V4＜V3。
the advantage of this is that when the chuck moves from the chuck retraction point B1 to the chuck start point A1, the chuck runs slowly, thereby ensuring the absolute positioning of the servo motor and ensuring that the error of the chuck from the chuck start point A1 is small. Therefore, unnecessary production errors caused by the change of the distance between the chuck and the chuck starting point A1 in the integral linkage process of the clamping mechanism are avoided.
The reason why the speeds of V1, V2 and V3 are higher is that the stroke from the chuck starting point A1 to the chuck opening point C1 is longer in the production process, so that the acceleration and deceleration of the servo motor have enough time to complete, and the high-speed operation can be carried out for the speed traction time, thereby improving the production efficiency. The speed of the chuck from the chuck closing point D1 to the chuck retraction point B1 is based on the same reason, so that the reciprocating time is shortened as much as possible in the reciprocating process of the weft yarn reciprocating traction of the servo motor, and the production efficiency is improved.
Further, V2 ═ V1.
Because the belt transmission servo motor does not stop and continues to operate when the chuck is at the chuck opening point C1 during operation, V2-V1 is more beneficial to the stability of production.
Further, the moving speed of the chuck moving from the chuck withdrawal point B1 to the chuck starting point A1 is 100 and 1000 mm/s.
The speed of moving the chuck from the chuck withdrawal point B1 to the chuck starting point a1 bit is slow because the distance from the chuck withdrawal point B1 to the chuck starting point a1 bit is short, about 20mm, and if the operation is fast, the servo start stops in a short distance, which may cause the transfer belt to wobble, thereby affecting the absolute position of the chuck from the chuck starting point a1 bit.
Or six chuck working positions are sequentially arranged between the belt conveyer and the weft selecting mechanism, and the six chuck working positions are sequentially as follows: a chuck starting point A2, a chuck retraction point B2, a middle retraction point F, a middle stop point E, a chuck opening point C2 and a chuck closing point D2; the weft selecting mechanism is provided with a second pressing plate for pressing weft yarns;
before the operation starts, the chuck is positioned at a chuck starting point A2 to stand by, when the operation is performed, the clamping rod starts to move under the drive of the belt conveyer, firstly, the chuck moves from the chuck starting point A2 to a chuck opening point C2 and opens, the clamping rod continues to move towards the direction of the weft selecting mechanism, so that the chuck reaches a chuck closing point D2 and closes, in the process that the chuck moves from the chuck opening point C2 to the chuck closing point D2, a second pressure plate of the weft selecting mechanism is loosened, weft yarns are clamped by two clamping jaws of the chuck, then a belt of the belt conveyer is reversely rotated, so that the clamping rod moves towards the direction far from the weft selecting mechanism, the weft yarns move towards the direction far from the weft selecting mechanism under the drive of the chuck, and when the chuck moves to an intermediate retraction point F, the movement of the clamping rod is stopped, so that the chuck is kept at the intermediate retraction point F;
closing a pressure plate of the weft selection mechanism, fixing one end of the weft, starting the belt conveyer again, enabling the clamping rod to move continuously in the direction away from the weft selection mechanism and enabling the clamping head to reach the middle stop point E, tensioning the weft and fixing the other end of the weft, and cutting off the weft to finish traction of one weft;
repeating the above process to complete the drawing of the needed weft yarn;
after the traction of the required weft yarn is completed, the clamping rod is enabled to continue to move in the direction away from the weft selecting mechanism, and the chuck is enabled to reach the position A2 of the starting point of the chuck, so as to be ready.
When all the needed weft yarns are pulled, the clamping heads are retreated to the position A2 of the initial point of the clamping heads, after all the weft yarns are pulled, the weaving machine carries out the next procedure, and the beating-up procedure is carried out, if the clamping heads stop at the position E of the middle stopping point, the beating-up steel buckle can knock down the rapier during working, and the device is damaged.
Further, the moving speed of the chuck moving from the middle backspacing point F position to the middle stopping point E position is 100-1000 mm/s.
The speed of moving the chuck from the middle back point F to the middle stop point E is slow because the distance between the middle back point F and the middle stop point E is short, about 15mm, and if the chuck is operated fast, the servo starts to stop in a short distance, which may cause the conveyor belt to shake, thereby affecting the absolute position of the stop point E.
Description of the drawings:
FIG. 1 is a basic manufacturing schematic diagram of a braiding apparatus
FIG. 2 is a schematic diagram of an embodiment of the present invention.
Fig. 3 is a top view of fig. 2 with the belt portion removed for ease of illustration.
Fig. 4 is an enlarged view of portion G of fig. 2, with the collet in an open position.
Fig. 5 is a state diagram when the chuck is closed.
Fig. 6 is a state diagram of the present invention in operation.
Fig. 7 is another state diagram of the present invention in operation.
The specific implementation mode is as follows:
example 1
Referring to fig. 6, a weft clamping mechanism 100 for clamping and pulling a weft is installed on a weft insertion mechanism of a 2.5D knitting machine, the 2.5D knitting machine has a weft selecting mechanism 110 spaced apart from the weft clamping mechanism, the weft clamping mechanism 100 includes a belt conveyer 20, a clamping rod 10 and a pressing block 30, and the belt conveyer is fixedly installed on a bracket of the weft insertion mechanism.
Referring to fig. 2-5, the belt conveyer 20 includes a driving pulley 21 rotatably mounted on the frame, a driven pulley 22, and a servo motor 24 for driving the driving pulley to rotate, and a belt 23 is looped around the driving pulley 21 and the driven pulley 22. Wherein, the driving wheel 21 and the driven wheel 22 are both arranged on the bracket through the rotating shaft, and the servo motor 21 is also arranged on the bracket.
The clamping rods 10 are arranged on a belt 23 of the belt conveyor, the pressing blocks 30 are rotatably mounted on the bracket, and the pressing blocks 30 press the clamping rods 10 on the belt; when the belt rotates, the clamping rods can be driven to reciprocate along the extending direction of the weft yarns.
The clamping rod 10 comprises a rapier 11 in a straight rod shape, two ends of the rapier 11 are respectively formed into a clamping end 19 and a tail end 18, and the clamping end 19 faces a weft selecting mechanism 110 of the 2.5D knitting machine; an inner cavity 15 is formed at the holding end 19 of the rapier 11, the inner cavity 15 has an opening on the end surface of the holding end, a cylinder 12 is fixedly installed in the inner cavity 15, and a chuck 13 is installed at the opening of the inner cavity.
The chuck 13 comprises two jaws arranged oppositely, each jaw is provided with an installation end and an engaging end arranged opposite to the installation end, each jaw is rotatably installed on the side wall of the inner cavity through the installation end, and a piston rod of the air cylinder is clamped on the installation ends of the jaws; the weft yarn can be clamped when the occlusion ends of the two claws abut against each other. When the piston rod moves, the clamping jaws can be driven to rotate, and the occlusion ends of the two clamping jaws are abutted together.
For convenience of description, the two jaws will be referred to as a first jaw 131 and a second jaw 136, respectively.
The first jaw 131 has a first mounting end 132 and a first engaging end 133 opposite to the first mounting end 132, a first groove-shaped pattern 134 is provided on an end surface of the first engaging end 133 facing the second jaw, the first jaw 131 is rotatably mounted on a first rotating shaft 141, and the first rotating shaft 141 is fixed on an inner wall of the inner cavity 15.
The second pawl 136 has a second mounting end 137 and a second engagement end 138 opposite the second mounting end 137, a second groove-like pattern 139 is provided on the end face of the second engagement end 138 facing the first pawl, the second pawl 136 is rotatably mounted on a second shaft 142, and the second shaft 142 is fixed to the inner wall of the inner chamber 15.
The mounting ends of the two jaws are provided with first teeth 1321, the air cylinder 12 is mounted on one side of the jaws facing the tail end of the rapier, specifically, the cylinder body 121 of the air cylinder 12 is fixed on the inner wall of the inner cavity 15, the piston rod 122 of the air cylinder extends along the axis 101 direction of the rapier 11 and can extend out towards the direction of the jaws, the tail end of the piston rod 122 is provided with a driving end 123, and the driving end 123 is provided with second teeth 124 meshed with the first teeth 1321.
The first teeth 1321 are engaged with the second teeth 124, and when the piston rod 122 extends and retracts in the direction of the axis 101 of the rapier 11, the two jaws are driven to rotate around the first rotating shaft 141 and the second rotating shaft 142 respectively through the engagement between the second teeth 124 and the first teeth 1321, so that the two jaws complete opening and closing actions.
The inner side surfaces 1311 of the two clamping jaws are concave outwards, when the clamping ends of the two clamping jaws are clamped together, the through holes 130 are formed between the two clamping jaws, and the design can reduce the clamping surfaces of the two clamping jaws so as to facilitate the processing of the clamping jaws and be more favorable for clamping weft yarns.
In this embodiment, the first teeth 1321 have a saw-toothed cross section along the length direction of the rapier, and the first teeth have a first tooth space extending along a direction perpendicular to the length direction of the rapier; the second tooth 124 is serrated along the length direction of the rapier, and has a second tooth slot extending perpendicular to the length direction of the rapier. When the first tooth is engaged with the second tooth, the tip of the first tooth is inserted into the tooth space of the second tooth, and the tip of the second tooth is inserted into the tooth space of the first tooth.
Referring to fig. 6, in the present embodiment, a starting point a1 of the gripper 111, a retraction point B1 of the gripper 112, an opening point C1 of the gripper 113, and a closing point D1 of the gripper 114 are sequentially disposed from the belt conveyer 20 to the weft selecting mechanism 110; the weft selection mechanism 110 has a first pressure plate 181 for pressing the weft thread.
Before the operation starts, the collet is on standby at the collet starting point A1 position 111, when in operation, the clamping rod 10 starts to move under the drive of the belt conveyor 20, firstly, the collet is moved from the collet starting point A1 position 111 to the collet opening point C1 position 113 and is opened, and the clamping rod continues to move towards the weft selecting mechanism 110, so that the collet reaches the collet closing point D1 position 114 and is closed. During the process that the chuck moves from the chuck opening point C1 position 113 to the chuck closing point D1 position 114, the first pressure plate 181 of the weft selecting mechanism is released, the weft yarn is clamped by the two clamping jaws of the chuck, then the belt of the belt conveyor 20 is reversed, the clamping rod 10 moves towards the direction far away from the weft selecting mechanism 110, the weft yarn moves towards the direction far away from the weft selecting mechanism 110 under the driving of the chuck, and when the chuck moves to the chuck withdrawing point B1 position 112, the movement of the clamping rod 10 is stopped, and the chuck is kept at the chuck withdrawing point B1 position 112.
Then the first pressure plate 181 of the weft selecting mechanism is closed to fix one end of the weft yarn, then the belt conveyer is started again, the clamping rod is moved continuously to the direction far away from the weft selecting mechanism, the clamping head reaches the position 111 of the starting point A1 of the clamping head, the weft yarn is tensioned and fixed at the other end, and then the weft yarn is cut off to finish the traction of one weft yarn.
And repeating the process to finish the traction of the needed weft yarns.
The moving speed of the chuck moving from the chuck starting point A1 to the chuck opening point C1 is V1,
the moving speed of the chuck moving from the chuck opening point C1 position to the chuck closing point D1 position is V2,
the moving speed of the chuck moving from the chuck closing point D1 to the chuck withdrawing point B1 is V3,
the moving speed of the chuck moving from the chuck withdrawing point B1 to the chuck starting point a1 is V4,
v4 is less than V1, V4 is less than V2, and V4 is less than V3; specifically, in this embodiment, V2 is equal to V1, and the moving speed V4 when the chuck moves from the chuck withdrawal point B1 to the chuck start point a1 is 500 mm/s. It is understood that in other embodiments, the moving speed V4 may be 100mm/s, 200mm/s, 400mm/s, 700mm/s or 1000mm/s, although other speeds between 100 and 1000mm/s are also possible. The speed can be set as required according to production requirements.
Example 2
The mechanical structure of this embodiment is the same as that of embodiment 1, except that the operation of the gripping head is different when pulling the weft, as described in detail below:
as shown in fig. 7, in the present embodiment, a gripper start point a2 bit 821, a gripper retreat point B2 bit 822, an intermediate stop point E bit 825, an intermediate retreat point F bit 826, a gripper opening point C2 bit 823 and a gripper closing point D2 bit 824 are sequentially provided from the belt conveyer 820 to the weft selecting mechanism 120; the weft selecting mechanism has a second platen 182 for pressing the weft;
before the work is started, the clamping head is positioned at a clamping head starting point A2 position 821 for standby, when in work, the clamping rod 810 starts to move under the driving of the belt conveyer 820, firstly, the clamping head is moved to a clamping head opening point C2 position 823 from the clamping head starting point A2 position 821 and is opened, the clamping rod continues to move towards the weft selecting mechanism 120, the clamping head reaches a clamping head closing point D2 position 824 and is closed, during the process from collet open point C2 position 823 to collet close point D2 position 824, the second pressure plate 882 of the weft selecting mechanism 120 is released, the weft yarn is clamped by the two clamping jaws of the clamping head, then the belt of the belt conveyer 820 is reversed to make the clamping rods move towards the direction far away from the weft selecting mechanism, the weft yarns move towards the direction far away from the weft selecting mechanism under the driving of the clamping heads, when the chuck moves to the middle back-off point F position 826, the movement of the clamping rod is suspended, so that the chuck is kept at the middle back-off point F position 826;
closing a pressure plate of the weft selection mechanism, fixing one end of the weft, starting the belt conveyer again, enabling the clamping rod to move continuously in the direction away from the weft selection mechanism and enabling the clamping head to reach a middle stopping point E position 825, tensioning the weft and fixing the other end of the weft, and cutting the weft to finish traction of one weft;
repeating the above process to complete the drawing of the needed weft yarn;
after the traction of the required weft yarn is finished, the clamping rod is enabled to continue to move in the direction away from the weft selecting mechanism, and the chuck is enabled to reach the starting point A2 position 821 of the chuck, and the standby state is realized.
In this embodiment, the moving speed of the chuck from the intermediate retreat point F position 826 to the intermediate stop point E position 825 is 600 mm/s.
It will be appreciated that in other embodiments the speed of movement of the collet from the intermediate retraction point F position 826 to the intermediate stop point E position 825 may be 100mm/s, 200mm/s, 400mm/s, 700mm/s or 1000mm/s, although other speeds between 100 and 1000mm/s are possible. The speed can be set as required according to production requirements.
Claims (7)
1. A weft yarn clamping mechanism is used for clamping and drawing weft yarns and is installed on a weft insertion mechanism of a 2.5D weaving machine, the 2.5D weaving machine is provided with a weft selecting mechanism arranged at an interval with the weft yarn clamping mechanism, and the weft yarn clamping mechanism is characterized by comprising a belt conveyer, a clamping rod and a pressing block, wherein the belt conveyer is fixedly installed on a support of the weft insertion mechanism and is provided with an annular belt capable of circularly rotating, the clamping rod is arranged on the belt of the belt conveyer, the pressing block is rotatably installed on the support, and the clamping rod is pressed on the belt by the pressing block; when the belt rotates, the clamping rods can be driven to reciprocate along the extending direction of the weft yarns;
the clamping rod comprises a straight rod-shaped rapier, two ends of the rapier form a clamping end and a tail end respectively, and the clamping end faces the weft selecting mechanism of the 2.5D knitting machine; an inner cavity is formed at the clamping end of the rapier, an opening is formed in the end face of the clamping end of the inner cavity, an air cylinder is fixedly installed in the inner cavity, and a clamping head is installed at the opening of the inner cavity;
the chuck comprises two jaws which are arranged oppositely, each jaw is provided with an installation end and an engagement end which is arranged opposite to the installation end, each jaw is rotatably installed on the side wall of the inner cavity through the installation end, and a piston rod of the air cylinder is clamped on the installation ends of the jaws; when the occlusion ends of the two claws abut against each other, the weft yarn can be clamped;
when the piston rod moves, the clamping jaws can be driven to rotate, so that the occlusion ends of the two clamping jaws are abutted together;
the belt conveyer also comprises a driving wheel, a driven wheel and a servo motor, wherein the driving wheel, the driven wheel and the servo motor are rotatably arranged on the bracket;
four chuck working positions are sequentially arranged from the belt conveyer to the weft selecting mechanism, and are sequentially arranged as follows: the starting point of the chuck is A1 bit, the retreating point of the chuck is B1 bit, the opening point of the chuck is C1 bit and the closing point of the chuck is D1 bit; the weft selecting mechanism is provided with a first pressing plate for pressing weft yarns;
before the operation starts, the chuck is positioned at a chuck starting point A1 to stand by, when the operation is performed, the clamping rod starts to move under the drive of the belt conveyer, firstly, the chuck moves from the chuck starting point A1 to a chuck opening point C1 and opens, the clamping rod continues to move towards the direction of the weft selecting mechanism, so that the chuck reaches a chuck closing point D1 and closes, in the process that the chuck moves from the chuck opening point C1 to a chuck closing point D1, a first pressure plate of the weft selecting mechanism is loosened, weft yarns are clamped by two clamping jaws of the chuck, then a belt of the belt conveyer is reversely rotated, so that the clamping rod moves towards the direction far from the weft selecting mechanism, the weft yarns move towards the direction far from the weft selecting mechanism under the drive of the chuck, and when the chuck moves to a chuck withdrawing point B1, the movement of the clamping rod is stopped, so that the chuck is kept at a chuck withdrawing point B1;
then closing a first pressure plate of the weft selection mechanism, fixing one end of the weft, starting the belt conveyer again, enabling the clamping rod to move continuously in the direction away from the weft selection mechanism and enabling the clamping head to reach the position A1 of the starting point of the clamping head, tensioning the weft and fixing the other end, and cutting off the weft to finish the traction of one weft;
repeating the above process to complete the drawing of the needed weft yarn;
the moving speed of the chuck moving from the chuck starting point A1 to the chuck opening point C1 is V1,
the moving speed of the chuck moving from the chuck opening point C1 position to the chuck closing point D1 position is V2,
the moving speed of the chuck moving from the chuck closing point D1 to the chuck withdrawing point B1 is V3,
the moving speed of the chuck moving from the chuck withdrawing point B1 to the chuck starting point a1 is V4,
V4＜V1，V4＜V2，V4＜V3；
V2＝V1。
2. weft yarn clamping mechanism according to claim 1,
the installation end of every jack catch all is provided with first tooth, and the cylinder is installed in the one side of the tail end of the arrow shaft of the orientation of jack catch, and the piston rod of cylinder extends and can stretch out towards the direction of jack catch along the axis direction of arrow shaft, is formed with the drive end on the piston rod, is provided with the second tooth that meshes with above-mentioned first tooth on this drive end.
3. Weft yarn clamping mechanism according to claim 2,
the section of the first tooth along the length direction of the rapier is in a sawtooth shape, and the first tooth is provided with a first tooth groove extending along the length direction vertical to the rapier;
the cross section of the second tooth along the length direction of the rapier is in a sawtooth shape, and the second tooth is provided with a second tooth socket extending along the length direction perpendicular to the rapier.
4. Weft yarn clamping mechanism according to claim 1,
the moving speed of the chuck moving from the chuck withdrawal point B1 to the chuck starting point A1 is 100-1000 mm/s.
5. A weft yarn clamping mechanism is used for clamping and drawing weft yarns and is installed on a weft insertion mechanism of a 2.5D weaving machine, the 2.5D weaving machine is provided with a weft selecting mechanism arranged at an interval with the weft yarn clamping mechanism, and the weft yarn clamping mechanism is characterized by comprising a belt conveyer, a clamping rod and a pressing block, wherein the belt conveyer is fixedly installed on a support of the weft insertion mechanism and is provided with an annular belt capable of circularly rotating, the clamping rod is arranged on the belt of the belt conveyer, the pressing block is rotatably installed on the support, and the clamping rod is pressed on the belt by the pressing block; when the belt rotates, the clamping rods can be driven to reciprocate along the extending direction of the weft yarns;
the clamping rod comprises a straight rod-shaped rapier, two ends of the rapier form a clamping end and a tail end respectively, and the clamping end faces the weft selecting mechanism of the 2.5D knitting machine; an inner cavity is formed at the clamping end of the rapier, an opening is formed in the end face of the clamping end of the inner cavity, an air cylinder is fixedly installed in the inner cavity, and a clamping head is installed at the opening of the inner cavity;
the chuck comprises two jaws which are arranged oppositely, each jaw is provided with an installation end and an engagement end which is arranged opposite to the installation end, each jaw is rotatably installed on the side wall of the inner cavity through the installation end, and a piston rod of the air cylinder is clamped on the installation ends of the jaws; when the occlusion ends of the two claws abut against each other, the weft yarn can be clamped;
when the piston rod moves, the clamping jaws can be driven to rotate, so that the occlusion ends of the two clamping jaws are abutted together;
the belt conveyer also comprises a driving wheel, a driven wheel and a servo motor, wherein the driving wheel, the driven wheel and the servo motor are rotatably arranged on the bracket;
six chuck working positions are sequentially arranged from the belt conveyer to the weft selecting mechanism, and are sequentially as follows: a chuck starting point A2, a chuck retraction point B2, a middle stop point E, a middle retraction point F, a chuck opening point C2 and a chuck closing point D2; the weft selecting mechanism is provided with a second pressing plate for pressing weft yarns;
before the operation starts, the chuck is positioned at a chuck starting point A2 to stand by, when the operation is performed, the clamping rod starts to move under the drive of the belt conveyer, firstly, the chuck moves from the chuck starting point A2 to a chuck opening point C2 and opens, the clamping rod continues to move towards the direction of the weft selecting mechanism, so that the chuck reaches a chuck closing point D2 and closes, in the process that the chuck moves from the chuck opening point C2 to the chuck closing point D2, a second pressure plate of the weft selecting mechanism is loosened, weft yarns are clamped by two clamping jaws of the chuck, then a belt of the belt conveyer is reversely rotated, so that the clamping rod moves towards the direction far from the weft selecting mechanism, the weft yarns move towards the direction far from the weft selecting mechanism under the drive of the chuck, and when the chuck moves to an intermediate retraction point F, the movement of the clamping rod is stopped, so that the chuck is kept at the intermediate retraction point F;
closing a pressure plate of the weft selection mechanism, fixing one end of the weft, starting the belt conveyer again, enabling the clamping rod to move continuously in the direction away from the weft selection mechanism and enabling the clamping head to reach the middle stop point E, tensioning the weft and fixing the other end of the weft, and cutting off the weft to finish traction of one weft;
repeating the above process to complete the drawing of the needed weft yarn;
after the traction of the required weft yarn is finished, the clamping rod is enabled to continue to move towards the direction away from the weft selecting mechanism, and the chuck is enabled to reach the chuck starting point A2 to be ready;
the moving speed of the chuck moving from the middle backspacing point E position to the middle stopping point F position is 100-1000 mm/s.
6. Weft yarn clamping mechanism according to claim 5,
the installation end of every jack catch all is provided with first tooth, and the cylinder is installed in the one side of the tail end of the arrow shaft of the orientation of jack catch, and the piston rod of cylinder extends and can stretch out towards the direction of jack catch along the axis direction of arrow shaft, is formed with the drive end on the piston rod, is provided with the second tooth that meshes with above-mentioned first tooth on this drive end.
7. Weft yarn clamping mechanism according to claim 5,
the section of the first tooth along the length direction of the rapier is in a sawtooth shape, and the first tooth is provided with a first tooth groove extending along the length direction vertical to the rapier;
the cross section of the second tooth along the length direction of the rapier is in a sawtooth shape, and the second tooth is provided with a second tooth socket extending along the length direction perpendicular to the rapier.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811379980.5A CN109457369B (en) | 2018-11-20 | 2018-11-20 | Weft yarn clamping mechanism |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811379980.5A CN109457369B (en) | 2018-11-20 | 2018-11-20 | Weft yarn clamping mechanism |
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| CN109457369A CN109457369A (en) | 2019-03-12 |
| CN109457369B true CN109457369B (en) | 2020-10-20 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112144163B (en) * | 2020-10-13 | 2021-07-13 | 岳西县长宁织绸有限责任公司 | Silk guide warp beam system |
| CN112522838A (en) * | 2020-11-26 | 2021-03-19 | 南京玻璃纤维研究设计院有限公司 | Weft insertion device |
| CN113000729B (en) * | 2021-01-27 | 2023-04-28 | 上海缆慧检测技术有限公司 | Special straight line cutting machine for combustion test |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US1856119A (en) * | 1929-12-18 | 1932-05-03 | Tomkinson Gerald | Weft needle or carrier for shuttleless looms |
| CN102021716A (en) * | 2010-12-16 | 2011-04-20 | 浙江理工大学 | Flexible pressure device fof sword belt |
| CN203498583U (en) * | 2013-07-18 | 2014-03-26 | 南京海拓复合材料有限责任公司 | Chuck applicable to weaving of non-bending fabrics |
| CN203420055U (en) * | 2013-07-25 | 2014-02-05 | 常州燎源纺织印染有限公司 | Rapier loom |
| CN205000070U (en) * | 2015-08-24 | 2016-01-27 | 石家庄纺织机械有限责任公司 | Fine extension flat filament intelligence loom wefting insertion double fastener exchange mechanism of carbon |
| CN207002947U (en) * | 2017-07-13 | 2018-02-13 | 浙江宏佳精工机械有限公司 | A kind of Sward belt radiator of weaving rapier loom |
| CN207987425U (en) * | 2017-11-14 | 2018-10-19 | 无锡市鼎麒新材料科技有限公司 | A kind of weft yarn clamping device for broadening thin cloth loom |
| CN108035053B (en) * | 2017-12-11 | 2021-03-12 | 南京玻璃纤维研究设计院有限公司 | Weft insertion device and weft insertion method for multilayer woven preform |
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Effective date of registration: 20200225 Address after: 210012, No. 30, Xi An Road, Yuhua West Road, Jiangsu, Nanjing Applicant after: Nanjing Glass Fibre Research and Design Institute company limited Address before: Jiangning District of Nanjing City, Jiangsu province 210000 Jiangning Science Park Tong Road No. 99 Applicant before: Sinoma Science & Technology Co.,Ltd. |
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