CN112746370A - Continuous traction device - Google Patents
Continuous traction device Download PDFInfo
- Publication number
- CN112746370A CN112746370A CN202011532702.6A CN202011532702A CN112746370A CN 112746370 A CN112746370 A CN 112746370A CN 202011532702 A CN202011532702 A CN 202011532702A CN 112746370 A CN112746370 A CN 112746370A
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- China
- Prior art keywords
- fixing device
- yarn bundle
- traction
- bundle fixing
- warp
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- 238000009941 weaving Methods 0.000 claims abstract description 23
- 230000007246 mechanism Effects 0.000 claims abstract description 20
- 230000000712 assembly Effects 0.000 claims abstract description 11
- 238000000429 assembly Methods 0.000 claims abstract description 11
- 238000003825 pressing Methods 0.000 claims description 24
- 230000001360 synchronised effect Effects 0.000 claims description 18
- 239000004744 fabric Substances 0.000 claims description 11
- 230000008878 coupling Effects 0.000 claims description 8
- 238000010168 coupling process Methods 0.000 claims description 8
- 238000005859 coupling reaction Methods 0.000 claims description 8
- 239000003638 chemical reducing agent Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 5
- 238000010924 continuous production Methods 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 2
- 238000001125 extrusion Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 1
- 238000006073 displacement reaction Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 16
- 238000010586 diagram Methods 0.000 description 4
- 235000014676 Phragmites communis Nutrition 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229920006253 high performance fiber Polymers 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009740 moulding (composite fabrication) Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D41/00—Looms not otherwise provided for, e.g. for weaving chenille yarn; Details peculiar to these looms
- D03D41/004—Looms for three-dimensional fabrics
Abstract
The invention discloses a continuous traction device which comprises a rack, two sets of warp yarn bundle fixing devices, two linear guide rails and two sets of traction assemblies. The two sets of traction assemblies are arranged on the rack, the traction assemblies are fixedly connected with two sets of warp-direction yarn bundle fixing devices, the two sets of devices are driven by cylinders to clamp a prefabricated body or yarns, and the two sets of warp-direction yarn bundle fixing devices are respectively connected with the linear guide rails. The invention adopts the servo motor to control the screw rod to rotate to complete traction circulation, has high displacement precision, can reach micron-sized errors, and meets the requirement of high-precision traction, the two sets of yarn bundle fixing devices are pneumatically clamped, can realize automatic continuous weaving, and the pneumatic devices are connected with the four-bar mechanism to have clamping and locking capabilities, thereby ensuring the clamping reliability.
Description
Technical Field
The invention belongs to the field of weaving equipment, and particularly relates to a continuous traction device.
Background
The three-dimensional weaving, manufacturing and forming is a novel weaving technology, yarn bundles are distributed in a three-dimensional space along two mutually vertical directions of a warp direction and a weft direction and are mutually interwoven to form an integral structure, the three-dimensional weaving technology is adopted, high-performance fibers are used as raw materials, a prefabricated body is prepared by a weaving and forming process, and a composite material member prepared by using the prefabricated body as a reinforcement has the advantages of light weight, high strength, excellent mechanical property and the like.
The three-dimensional weaving equipment is shown in figure 1, which is a basic manufacturing principle diagram of three-dimensional 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.
The three-dimensional woven preform machine weaving equipment continuous traction device is one of five motion systems in the three-dimensional woven preform forming manufacturing, in the three-dimensional woven preform machine weaving forming manufacturing process, because a preform has a certain thickness, the woven and formed preform is not suitable for curling (a cloth weaving and winding device of a common two-dimensional loom), the three-dimensional woven preform with a certain thickness can cause slippage of yarns when being wound, the wrinkles of the preform and other serious influences the uniformity, quality consistency and other problems of the product due to the difference of the inner diameter and the outer diameter, and the three-dimensional woven preform is not suitable for winding; in addition, because the raw materials used for the high-thickness woven preform are mostly high-performance fibers (carbon fibers, glass fibers, quartz fibers and the like), the number of warp yarns used for forming and weaving is large, the linear density of the yarns is large, so that the formed woven preform has large weight, and when the preform is formed and woven, large horizontal traction force and clamping force are needed to ensure the forming and weaving of the woven preform. Therefore, in order to ensure that the woven and molded preform is continuously pulled away from the fell, realize the continuous manufacture of the three-dimensional woven preform and ensure the reliability and stability of the product quality, a continuous traction device for the three-dimensional woven preform with larger traction force and clamping force needs to be designed.
201811386651.3 discloses a horizontal drawing mechanism, which mentions that the horizontal drawing is carried out after the three-dimensional woven preform is manufactured and formed, the preform can be continuously drawn away from the weaving opening, but the patent can not realize the continuous manufacture of the preform, the preform needs to be cut after being manufactured and formed for a certain length, then the warp yarns are rooted and positioned again, the yarn tension is adjusted, the manufacture of the next product is carried out again, the product can not be produced continuously, the raw material waste is serious, and the production efficiency is low.
Disclosure of Invention
The invention aims to provide a continuous traction device which can ensure that the cloth fell of a prefabricated body is unchanged according to the design requirement of the prefabricated body, continuously lead the formed prefabricated body away from the cloth fell and realize the continuous production and manufacture of a three-dimensional woven prefabricated body.
The technical solution for realizing the purpose of the invention is as follows: a continuous traction device comprises a rack, a first warp yarn bundle fixing device, a second warp yarn bundle fixing device, two linear guide rails and two sets of traction assemblies. The frame is the platform of whole device, and two sets of traction assembly all set up in the frame, have linked firmly a warp direction yarn bundle fixing device respectively on every traction assembly, and first warp direction yarn bundle fixing device and second warp direction yarn bundle fixing device all are connected with two linear guide, slide along two linear guide.
The first warp yarn bundle fixing device is in a loose state, the second warp yarn bundle fixing device is in a yarn clamping state in a moving traction mode, in the weaving process, the second warp yarn bundle fixing device achieves fabric traction, when the forming size of the woven preform reaches the number of pieces or the length of a required sample, the first warp yarn bundle fixing device clamps, the second warp yarn bundle fixing device loosens and moves to a position close to the position behind the first warp yarn bundle fixing device, the second warp yarn bundle fixing device clamps, the first warp yarn bundle fixing device loosens, an operation cycle is completed, operation is conducted according to the operation cycle, yarn does not need to be tied again, and continuous production weaving of the woven preform is achieved.
Compared with the prior art, the invention has the remarkable advantages that:
(1) the cloth fell of the prefabricated body is ensured to be unchanged by utilizing the traction mechanism, the cloth fell is matched with the parameter design of the prefabricated body, the weaving forming manufacturing efficiency is high, and the continuous forming manufacturing of the prefabricated body can be realized;
(2) the servo motor is used for controlling, the operation is reliable, and the mechanism is very simple;
(3) the invention adopts a horizontal traction movement mode to integrally adjust the tension of the warp yarn bundles.
(4) The horizontal traction moving step pitch can be set according to the technological requirement of weft control density of the prefabricated body, each traction action and the moving step pitch of the prefabricated body can be accurately controlled by a servo motor, and meanwhile, the weaving opening position of the prefabricated body is fixed and controllable.
(5) Traction, while presented for three-dimensional woven preform forming fabrication, is equally applicable to other three-dimensional orthogonal preform woven fabrication.
Drawings
FIG. 1 is a basic manufacturing schematic diagram of a three-dimensional woven preform weaving apparatus.
Fig. 2 is a schematic structural diagram of a continuous traction device according to the present invention.
Fig. 3 is a schematic diagram of the continuous driving of the continuous traction device according to the present invention.
Figure 4 is a schematic view of a second warp yarn bundle holding device of the continuous draft gear of the present invention.
FIG. 5 is a schematic view of a first warp yarn bundle holding device of the continuous draft gear of the present invention.
FIG. 6 is a schematic view of the working principle of two sets of warp yarn bundle fixing devices of the continuous traction device of the present invention.
Detailed Description
The present invention is described in further detail below with reference to the attached drawing figures.
With reference to fig. 2 to 6, the continuous traction device of the present invention includes a frame 103, a first warp yarn bundle fixing device 101, a second warp yarn bundle fixing device 102, two linear guide rails 104, and two sets of traction assemblies. The machine frame 103 is a platform of the whole device, two sets of traction assemblies are arranged on the machine frame 103, each traction assembly is fixedly connected with a warp yarn bundle fixing device, and the first warp yarn bundle fixing device 101 and the second warp yarn bundle fixing device 102 are connected with the two linear guide rails 104 and slide along the two linear guide rails 104.
The traction assembly comprises a servo motor 51, a speed reducer 52, a plurality of tension wheels 53, a plurality of synchronous pulleys 54, a synchronous belt 55, two rigid couplings 56, two lead screw fixed end supports 57, two lead screws 58, two ball lead screw nuts 59 and two bearing seats 60. Two lead screws 58 are symmetrically arranged on a frame 103 in parallel, one end of each lead screw is connected and positioned with the frame 103 through a bearing seat 60, the other end of each lead screw penetrates through the frame 103 and is connected with a synchronous pulley 54 through a lead screw fixed end support 57 and a rigid coupling 56, a ball lead screw nut 59 is arranged on each lead screw 58, a synchronous belt 55 is connected with a tension pulley 53 and the synchronous pulley 54, a speed reducer 52 is arranged on a servo motor 51, and the servo motor 51 is connected with the synchronous pulley 54.
The servo motor 51 drives the synchronous pulley 54 to rotate, the synchronous pulley 54 controls the synchronous belt 55 to rotate in a tensioning mode under the extrusion of the tensioning wheel 53 and drives the rigid coupling 56 to rotate, so that the screw rod 58 and the rigid coupling 56 rotate synchronously, the screw rod 58 drives the ball screw nut 59 to move linearly in the rotating process, and the ball screw nut 59 is fixedly connected with a warp-direction yarn bundle fixing device. The ball screw nut 59 drives the warp-wise yarn bundle fixing device to horizontally pull and move, and can move forward or backward, and the movement step and the reciprocating motion of the warp-wise yarn bundle fixing device are controlled by the servo motor 51 and the speed reducer 52.
The screw rods 58 in the two traction assemblies are arranged in parallel and in the same horizontal plane, the two screw rods 58 in the first traction assembly are symmetrically positioned on the inner side of the frame 103, and the two screw rods 58 in the second traction assembly are symmetrically positioned on the outer side of the frame 103.
Two linear guide rails 104 are fixed on the top surface of the frame 103 in parallel, located between the two traction assemblies, and parallel to the screw rod 58.
Referring to fig. 5, the first warp yarn bundle fixing device 101 includes a first base 31 and two sets of first fixing devices located at two ends of the first base 31, and the first fixing devices include a first pressing block 32, a first lock nut 33, a first screw 34, a first connecting rod 35, a first driving rocker 36, a first guiding slider seat 37, a first air cylinder 38, a first air cylinder support 39, a first rocker slider mechanism frame 40 and a yarn traction and tying device 41. The first base 31 is horizontally fixed on two ball screw nuts 59 and two linear guide rails 104 in the first traction assembly, two sets of fixing devices are positioned at two ends of the first base 31 and connected with the top surface of the first base 31, wherein the first rocker-slider mechanism frame 40 is vertically arranged above the top surface of the first base 31 and fixedly connected with the first base 31 through a connecting piece, a first screw 34, a first connecting rod 35, a first driving rocker 36 and a first guide slider seat 37 are fixed on the first base, and the first pressing block 32 is connected with the first screw 34 through a first locking nut 33. A link mechanism consisting of a first connecting rod 35, a first driving rocker 36, a first guide slider seat 37 and a first rocker slider mechanism frame 40 is driven by a first air cylinder 38 to perform linear motion in the vertical direction, and a yarn traction and fastening device 41 is arranged on the top surface of the first base 31.
The first warp yarn bundle fixing device 101 and the second warp yarn bundle fixing device 102 are respectively provided with a traction tying device 41. The contact surfaces of the first base 31 and the first pressing block 32 are designed into the shape of mutually-meshed waves, so that the clamping force of the traction device is increased, namely the friction force between the first base and the prefabricated body is increased, and a good clamping and traction effect is ensured.
Referring to fig. 4, the second warp-wise yarn bundle fixing device 102 includes a second base 11 and two sets of second fixing devices located at two ends of the second base 11, each second fixing device includes a second pressing block 12, a second lock nut 13, a second clamping rocker 14, a second connecting member 15, a second bolt 16, a second driving rocker 17, a second connecting rod 18, a second double-rocker mechanism frame 19, a second cylinder 20, a second cylinder support 21 and a second yarn clamping device support seat 22, the second base 11 is horizontally fixed on two ball screw nuts 59 and two linear guide rails 104 in the second traction assembly, the two second yarn clamping device support seats 22 are symmetrically fixed at two ends of the top surface of the second base 11, one end of the second cylinder 20 is fixed on the top surface of the second yarn clamping device support seat 22 through the second cylinder support seat 21, and the other end of the second cylinder 20 is connected to the second driving rocker 17, the second connecting rod 18, And the top surface and the bottom surface of the second clamping rocker 14 are connected with a second connecting piece 15, and the second pressing block 12 is fixed with the second connecting piece 15 through a second locking nut 13 and a second bolt 16.
A connecting rod mechanism consisting of a second driving rocker 17, a second connecting rod 18, a second clamping rocker 14 and a second double-rocker mechanism rack 19 is driven by a second air cylinder 20 to clamp the prefabricated braided fabric, and the second base 11 horizontally moves under the driving of a second traction assembly to finish horizontal traction movement. The traction mechanism is suitable for a prefabricated body with the thickness of 1 mm-60 mm.
The yarn pulling and tying device 41 comprises a U-shaped pressing cover 411, a pressing fixing bolt 412 and a plurality of pins 413, the U-shaped pressing cover 411 is fixedly connected with the first base 31 (or the second base 11) through the pressing fixing bolt 412, the pins 413 are sequentially arranged, one end of each pin is inserted into the corresponding hole (reserved in advance) of the first base 31 (or the second base 11), the other end of each pin is inserted into the U-shaped pressing cover 411 (reserved in advance), warp yarns need to be hung on the pins 413 at the corresponding position at the starting position of the prefabricated body, the U-shaped pressing cover 411 is detached during yarn tying, the U-shaped pressing cover 411 is installed and fixed after tying is finished, warp yarn bundles at one end are fixed on the yarn pulling and tying device 41, and the yarn pulling and tying device 41 performs horizontal movement under the driving of the first pulling assembly (or the second pulling assembly), and horizontal pulling movement is completed.
Referring to fig. 6, initially, the fixed first warp yarn bundle fixing device 101 is in a loose state, the second warp yarn bundle fixing device 102 is drawn in a yarn clamping state by movement, during weaving, the second warp yarn bundle fixing device 102 realizes drawing of the fabric, when the formed dimension of the woven preform reaches the piece number or length required for sample shedding, the first warp yarn bundle fixing device 101 is clamped, the second warp yarn bundle fixing device 102 is loosened, the fabric preform advances to a position adjacent to the rear of the first warp yarn bundle fixing device 101, the second warp yarn bundle fixing device 102 is clamped, the first warp yarn bundle fixing device 101 is loosened, and according to fig. 6, an operation cycle is completed from step 1 to step 4, the operation is performed according to the operation cycle, and continuous production weaving of the woven preform is realized without tying yarns again.
Claims (8)
1. A serialization draw gear which characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
the device comprises a rack (103), wherein two parallel linear guide rails (104) are arranged on the top surface of the rack (103);
the two sets of traction assemblies are arranged on the rack (103), each traction assembly is fixedly connected with a warp-direction yarn bundle fixing device, the first warp-direction yarn bundle fixing device (101) and the second warp-direction yarn bundle fixing device (102) are connected with the two linear guide rails (104) and slide along the two linear guide rails (104), and the two sets of traction assemblies work alternately without tying yarns again to realize horizontal traction of yarn bundles.
2. The serialization traction apparatus as defined in claim 1, wherein: the traction assembly comprises a servo motor (51), a speed reducer (52), a plurality of tension wheels (53), a plurality of synchronous pulleys (54), a synchronous belt (55), two rigid couplings (56), two lead screw fixed end supports (57), two lead screws (58), two ball lead screw nuts (59) and two bearing seats (60); two lead screws (58) are symmetrically arranged on a rack (103) in parallel, one end of each lead screw is connected and positioned with the rack (103) through a bearing seat (60), the other end of each lead screw penetrates through the rack (103) and then is connected with a synchronous pulley (54) through a lead screw fixed end support (57) and a rigid coupling (56), each lead screw (58) is provided with a ball lead screw nut (59), a synchronous belt (55) is connected with a tension pulley (53) and the synchronous pulley (54), a speed reducer (52) is arranged on a servo motor (51), and the servo motor (51) is connected with the synchronous pulley (54);
the servo motor (51) drives the synchronous pulley (54) to rotate, the synchronous pulley (54) controls the synchronous belt (55) to rotate in a tensioning mode under the extrusion of the tensioning wheel (53) and drives the rigid coupling (56) to rotate, so that the screw rod (58) and the rigid coupling (56) rotate synchronously, the screw rod (58) drives the ball screw nut (59) to move linearly in the rotating process, and the ball screw nut (59) is fixedly connected with a warp-direction yarn bundle fixing device; the ball screw nut (59) drives the warp yarn bundle fixing device to horizontally draw and move, and the warp yarn bundle fixing device can move forwards or backwards, and the movement step and the reciprocating motion of the warp yarn bundle fixing device are controlled by the servo motor (51) and the speed reducer (52).
3. The serialization traction apparatus as defined in claim 2, wherein: the screw rods (58) in the two traction assemblies are parallel and arranged on the same horizontal plane, the two screw rods (58) in the first traction assembly are symmetrically positioned on the inner side of the rack (103), and the two screw rods (58) in the second traction assembly are symmetrically positioned on the outer side of the rack (103).
4. The serialization traction apparatus as defined in claim 1, wherein: the first warp yarn bundle fixing device (101) comprises a first base (31) and two sets of first fixing devices positioned at two ends of the first base (31), each first fixing device comprises a first pressing block (32), a first lock nut (33), a first screw (34), a first connecting rod (35), a first driving rocker (36), a first guide slider seat (37), a first air cylinder (38), a first air cylinder support (39) and a first rocker slider mechanism frame (40), the first base (31) is horizontally fixed on two ball screw rod nuts (59) and two linear guide rails (104) in a first traction assembly, the two sets of fixing devices are positioned at two ends of the first base (31) and connected with the top surface of the first base (31), wherein the first rocker slider mechanism frame (40) is vertically arranged above the top surface of the first base (31) and fixedly connected with the first base (31) through a connecting piece, a first screw rod (34), a first connecting rod (35), a first driving rocker (36) and a first guide sliding block seat (37) are fixed on the first pressing block (32), and the first pressing block is connected with the first screw rod (34) through a first locking nut (33); utilize first cylinder (38) to drive first connecting rod (35), first drive rocker (36), first direction slider seat (37) and the link mechanism of first rocker slider mechanism frame (40) constitution to carry out linear motion in vertical direction, the contact surface of first base (31) and first briquetting (32) designs into intermeshing wave shape, increases draw gear's clamping-force, also increases and the prefabricated body between frictional force exactly, guarantees to have good centre gripping and pulls the effect.
5. The serialization traction apparatus as defined in claim 1, wherein: the second warp yarn bundle fixing devices (102) comprise a second base (11) and two sets of second fixing devices positioned at two ends of the second base (11), each second fixing device comprises a second pressing block (12), a second lock nut (13), a second clamping rocker (14), a second connecting piece (15), a second bolt (16), a second driving rocker (17), a second connecting rod (18), a second double-rocker mechanism rack (19), a second air cylinder (20), a second air cylinder support (21) and a second yarn clamping device support seat (22), the second base (11) is horizontally fixed on two ball screw rod nuts (59) and two linear guide rails (104) in a second traction assembly, the two second yarn clamping device support seats (22) are symmetrically fixed at two ends of the top surface of the second base (11), one end of the second air cylinder (20) is fixed on the top surface of the second yarn clamping device support seat (22) through the second air cylinder support seat (21), the other end of the second cylinder (20) is connected with a connecting rod mechanism consisting of a second driving rocker (17), a second connecting rod (18), a second clamping rocker (14) and a second double-rocker mechanism rack (19), the top surface and the bottom surface of the second clamping rocker (14) are connected with a second connecting piece (15), and a second pressing block (12) is fixed with the second connecting piece (15) through a second locking nut (13) and a second bolt (16).
6. The serialization traction apparatus as defined in claim 1, wherein: and the first warp yarn bundle fixing device (101) and the second warp yarn bundle fixing device (102) are respectively provided with a traction and tying device (41).
7. The serialization traction apparatus as defined in claim 6, wherein: the yarn pulling and tying device (41) comprises a U-shaped pressing cover (411), a pressing fixing bolt (412) and a plurality of pins (413), the U-shaped pressing cover (411) is fixedly connected with the base through the pressing fixing bolt (412), the pins (413) are sequentially arranged, one end of each pin is inserted into the base, the other end of each pin is inserted into the U-shaped pressing cover (411), warp yarns are required to be hung on the pins (413) in corresponding positions at the starting position of the prefabricated body, the U-shaped pressing cover (411) is detached during yarn tying, the U-shaped pressing cover (411) is installed and fixed after tying is finished, warp yarn bundles at one end of each warp yarn bundle are fixed on the yarn pulling and tying device (41), and the yarn pulling and tying device (41) performs horizontal movement under the driving of a pulling assembly to complete horizontal pulling movement.
8. A method for realizing a continuous traction device based on any one of the claims 1 to 7 is characterized by comprising the following steps: the fixed first warp yarn bundle fixing device (101) is in a release state at the beginning, the second warp yarn bundle fixing device (102) is drawn in a yarn clamping state in a moving mode, the second warp yarn bundle fixing device (102) achieves drawing of the fabric in the weaving process, when the forming size of the woven preform reaches the piece number or the length needing sample removing, the first warp yarn bundle fixing device (101) is clamped, the second warp yarn bundle fixing device (102) is released and advances to the adjacent position behind the first warp yarn bundle fixing device (101), the second warp yarn bundle fixing device (102) is clamped, the first warp yarn bundle fixing device (101) is released, an operation cycle is completed, operation is carried out according to the operation cycle, yarn tying does not need to be carried out again, and continuous production weaving of the woven preform is achieved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011532702.6A CN112746370A (en) | 2020-12-23 | 2020-12-23 | Continuous traction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011532702.6A CN112746370A (en) | 2020-12-23 | 2020-12-23 | Continuous traction device |
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| Publication Number | Publication Date |
|---|---|
| CN112746370A true CN112746370A (en) | 2021-05-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011532702.6A Pending CN112746370A (en) | 2020-12-23 | 2020-12-23 | Continuous traction device |
Country Status (1)
| Country | Link |
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| CN (1) | CN112746370A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116619055A (en) * | 2023-07-25 | 2023-08-22 | 无锡普莱赛斯实业有限公司 | Multifunctional rack of numerical control machine tool |
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Application publication date: 20210504 |