CN108907041B - Wire conveying mechanism of binding post cutting press and working method - Google Patents
Wire conveying mechanism of binding post cutting press and working method Download PDFInfo
- Publication number
- CN108907041B CN108907041B CN201810694511.6A CN201810694511A CN108907041B CN 108907041 B CN108907041 B CN 108907041B CN 201810694511 A CN201810694511 A CN 201810694511A CN 108907041 B CN108907041 B CN 108907041B
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- wire
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- traction wheel
- binding post
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- 238000005520 cutting process Methods 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 8
- 230000001360 synchronised effect Effects 0.000 claims abstract description 52
- 238000003860 storage Methods 0.000 claims abstract description 39
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000002615 epidermis Anatomy 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 210000003491 skin Anatomy 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F23/00—Feeding wire in wire-working machines or apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F11/00—Cutting wire
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/28—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for wire processing before connecting to contact members, not provided for in groups H01R43/02 - H01R43/26
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/82—Recycling of waste of electrical or electronic equipment [WEEE]
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Basic Packing Technique (AREA)
- Wire Processing (AREA)
Abstract
The invention relates to a wire conveying mechanism of a binding post cutting press and a working method, which are characterized in that: the wire conveying mechanism of the binding post cutting press comprises a binding post cutting press, a first traction wheel, a wire storage mechanism, a second traction wheel, a plurality of wire guide wheels and a wire conveying disc, wherein the first traction wheel, the wire storage mechanism, the second traction wheel, the plurality of wire guide wheels and the wire conveying disc are sequentially arranged at the front end of the binding post cutting press, and wires are sequentially conveyed to the binding post cutting press from the wire conveying disc, the plurality of wire guide wheels, the second traction wheel, the wire storage mechanism and the first traction wheel; the wire storage mechanism comprises a machine base and two vertical guide rails arranged on the machine base, and the wire conveying mechanism of the binding post cutting press is simple in structure and reasonable in design, and the brake is arranged on the wheel shaft of the upper synchronous pulley, so that the lifting lower guide wheel cannot fall wantonly, damage to parts such as the lifting lower guide wheel is avoided, and the service life of equipment is prolonged.
Description
Technical field:
the invention relates to a wire conveying mechanism of a binding post cutting press and a working method.
The background technology is as follows:
the binding post cutting press is used for cutting off the metal cable and makes binding post, and in the past wire rod conveying mechanism of binding post cutting press is because the design is unreasonable in the use, makes the part of equipment damage easily to and cause the wire rod epidermis damage easily, in addition can also make binding post cutting press shut down frequency increase, influence production efficiency.
The invention comprises the following steps:
the invention provides a wire conveying mechanism of a binding post cutting press and a working method, and the wire conveying mechanism of the binding post cutting press is simple in structure and reasonable in design, and is also beneficial to reducing the damage of parts.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the invention relates to a wire rod conveying mechanism of a binding post cutting press, which is characterized in that: the wire rod is sequentially conveyed to the wire-connecting terminal cutting press from the wire-conveying disc, the wire-guiding wheels, the second traction wheel, the wire storage mechanism and the first traction wheel; the wire storage mechanism comprises a machine base and two vertical guide rails arranged on the machine base, an upper guide wheel with a plurality of guide grooves is fixedly arranged on the upper portions of the two vertical guide rails, a lifting lower guide wheel with a plurality of guide grooves is arranged between the two vertical guide rails and below the upper guide wheel, wires are sequentially wound in the guide grooves between the upper guide wheel and the lifting lower guide wheel, an upper synchronous pulley and a lower synchronous pulley are respectively arranged on the upper portion and the lower portion of one side of the vertical guide rails, a synchronous belt is wound between the upper synchronous pulley and the lower synchronous pulley, clamping blocks connected with the lifting lower guide wheel are fixedly arranged on the synchronous belt, and a brake is arranged on a wheel shaft of the upper synchronous pulley.
Further, a first driving motor and an encoder are arranged on the wheel shaft of the upper synchronous pulley, and the encoder and the first driving motor are connected with a controller.
Further, a sensor is arranged on the wire wheel closest to the wire conveying disc in the wire wheels, and the sensor is connected with the controller.
Further, the driving motors of the first traction wheel and the second traction wheel are connected with the controller.
Further, the guide rail is arranged on the vertical guide rail, two ends of the hinge shaft of the liftable lower guide wheel are embedded in the guide rail, the guide rail is arranged on the vertical guide rail, two ends of the hinge shaft of the liftable lower guide wheel are provided with limiting guide wheels, and the limiting guide wheels are limited on the guide rail.
Further, a buffer rubber block is arranged at the lower part of the machine seat.
The working method of the wire rod conveying mechanism of the binding post cutting press is characterized by comprising the following steps of: the wire conveying mechanism of the binding post cutting press comprises a binding post cutting press, a first traction wheel, a wire storage mechanism, a second traction wheel, a plurality of wire guide wheels and a wire conveying disc, wherein the first traction wheel, the wire storage mechanism, the second traction wheel, the plurality of wire guide wheels and the wire conveying disc are sequentially arranged at the front end of the binding post cutting press, and wires are sequentially conveyed to the binding post cutting press from the wire conveying disc, the plurality of wire guide wheels, the second traction wheel, the wire storage mechanism and the first traction wheel; the wire storage mechanism comprises a machine base and two vertical guide rails arranged on the machine base, wherein an upper guide wheel with a plurality of guide grooves is fixedly arranged at the upper parts of the two vertical guide rails, a lifting lower guide wheel with a plurality of guide grooves is arranged between the two vertical guide rails and below the upper guide wheel, wires are sequentially wound in the plurality of guide grooves between the upper guide wheel and the lifting lower guide wheel, an upper synchronous pulley and a lower synchronous pulley are respectively arranged at the upper part and the lower part of the side of one vertical guide rail, a synchronous belt is wound between the upper synchronous pulley and the lower synchronous pulley, clamping blocks connected with the lifting lower guide wheel are fixedly arranged on the synchronous belt, and a brake is arranged on a wheel shaft of the upper synchronous pulley; during operation, wires are sequentially conveyed from the wire conveying disc, the wire guide wheels, the second traction wheel, the wire storage mechanism and the first traction wheel to the wire connecting terminal cutting press, during the wire conveying disc, the joint position of the wires is accidentally disconnected, the lifting lower guide wheel can fall, the brake can drag the wheel shaft of the upper synchronous pulley, the synchronous belt is enabled not to rotate, and the lifting lower guide wheel also stops falling.
Further, a first driving motor and an encoder are arranged on the wheel shaft of the upper synchronous pulley, and the encoder and the first driving motor are connected with a controller; the wire wheel closest to the wire conveying disc in the wire wheels is provided with a sensor which is connected with the controller; the driving motors of the first traction wheel and the second traction wheel are connected with the controller; when the wire feeding device is in operation, when the wire feeding disc is accidentally stuck, the wire wheel closest to the wire feeding disc does not rotate, the first traction wheel still pulls the wire to feed the wire to the wire connecting terminal cutting machine, the distance between the upper guide wheel and the liftable lower guide wheel of the wire storage mechanism is gradually closed at the moment, namely the wire storage on the wire storage mechanism is gradually conveyed to the wire connecting terminal cutting machine, the sensor positioned on the wire wheel closest to the wire feeding disc detects that the wire wheel does not rotate, namely the signal is fed back to the controller, and the controller triggers the driving motor of the second traction wheel to stop working (the driving motor of the first traction wheel still works); after the wire clamping condition of the wire conveying disc is eliminated, the driving motor of the second traction wheel starts to work, the wire is quickly replenished in the wire storage mechanism, the lifting lower guide wheel descends, the first driving motor receives a controller signal, the first driving motor acts at a certain rotating speed, the lifting lower guide wheel is prevented from descending too fast, and the brake does not work.
The wire conveying mechanism of the binding post cutting press is simple in structure and reasonable in design, and the brake is arranged on the wheel shaft of the upper synchronous pulley, so that the lifting lower guide wheel cannot fall wantonly, damage to parts such as the lifting lower guide wheel is avoided, and the service life of equipment is prolonged.
Description of the drawings:
FIG. 1 is a schematic diagram of the principle construction of the present invention;
FIG. 2 is a schematic view of the construction of the wire storage mechanism;
FIG. 3 is a schematic side view of the configuration of FIG. 2;
fig. 4 is a schematic diagram of a connection structure of the upper and lower timing pulleys and the timing belt;
FIG. 5 is a schematic view of the configuration of the traction wheel;
FIGS. 6 and 7 are partial schematic views of the construction of FIG. 3;
FIG. 8 is a schematic diagram of circuit control;
FIG. 9 is a schematic view of an embodiment of a brake.
The specific embodiment is as follows:
the wire rod conveying mechanism of the binding post cutting press comprises a binding post cutting press 1, a first traction wheel 2, a wire storage mechanism 3, a second traction wheel 4, a plurality of wire guide wheels 5 and a wire conveying disc 6 which are sequentially arranged at the front end of the binding post cutting press, wherein a wire rod K is sequentially conveyed to the binding post cutting press 1 from the wire conveying disc 6, the plurality of wire guide wheels 5, the second traction wheel 4, the wire storage mechanism 3 and the first traction wheel 2; the wire storage mechanism 3 comprises a machine base 7 and two vertical guide rails 8 arranged on the machine base, an upper guide wheel 10 with a plurality of guide grooves 9 is fixedly arranged on the upper portions of the two vertical guide rails 8, a lifting lower guide wheel 11 with a plurality of guide grooves is arranged between the two vertical guide rails 8 and below the upper guide wheel, wires are sequentially wound in the guide grooves 9 between the upper guide wheel and the lifting lower guide wheel, an upper synchronous pulley 12 and a lower synchronous pulley 13 are respectively arranged on the upper portion and the lower portion of the side of one vertical guide rail, a synchronous belt 14 is wound between the upper synchronous pulley 12 and the lower synchronous pulley 13, a clamping block 15 connected with the lifting lower guide wheel is fixedly arranged on the synchronous belt 14, and a brake 17 is arranged on a wheel shaft 16 of the upper synchronous pulley.
The clamping blocks 15 are fixed on the synchronous belt 14 through screws, so that the clamping blocks 15 on the synchronous belt generate lifting displacement under the action of the upper synchronous belt pulley 12 and the lower synchronous belt pulley 13, the lifting lower guide pulley 11 fixed with the clamping blocks 15 can also lift and displace, the brake 17 can be similar to a mechanical brake of an automobile safety belt self-locking device, or is an electric clamp, namely when the rotation speed of the wheel axle 16 is detected to be too large by an encoder, the controller clamps the brake 17, the clamp parts can be electric calipers and the like, or as shown in fig. 9, an arc friction plate 27 is arranged on the periphery of the wheel axle 16, one end of the arc friction plate 27 is fixed, the other end of the arc friction plate is arranged at the output end of a telescopic rod of the electromagnetic valve 28, and after the electromagnetic valve 28 receives a signal of the controller 20, the telescopic rod of the electromagnetic valve 28 is driven to extend, so that the arc friction plate 27 clamps the wheel axle 16, and the rotation speed of the wheel axle 16 is slowed down or stopped.
Further, a first driving motor 18 and an encoder 19 are arranged on the wheel shaft of the upper synchronous pulley, and the encoder 19 and the first driving motor 18 are connected with a controller 20. The encoder converts the angular displacement or linear displacement into an electrical signal, detects the rotational speed of the axle 16, and transmits the rotational speed signal to the controller 20, which compares the speed to a threshold value, and if the speed is within the threshold value, the controller initiates the brake operation in excess of, i.e., in feedback.
Further, a sensor 21 is arranged on the wire wheel closest to the wire conveying disc in each wire wheel, and the sensor 21 is connected with the controller 20. The sensor 21 is arranged on the wire wheel closest to the wire conveying disc, when the wire wheel rotation speed is detected to be zero, the phenomenon of wire clamping or wire breakage of the wire conveying disc 6 is indicated, when the controller 20 receives the signal, the operation of the driving motor of the second traction wheel 4 is stopped, the second traction wheel 4 does not forcedly pull wires, the wire skin is prevented from being worn, meanwhile, the controller 20 can trigger the buzzer and the LED lamp to operate, an operator is reminded to remove the wire clamping or wire breakage of the wire conveying disc 6, and when the wire conveying disc 6 does not clamp or wire breakage any more, the operation of the driving motor of the second traction wheel 4 can be recovered through the reset key; the time is reserved for an operator to remove faults, the time is controlled by the controller, namely, the encoder in the wire storage mechanism 3 detects the length of the conveyed wire in the fault period and compares the length of the conveyed wire with the length of the stored wire prestored in the controller by the wire storage mechanism 3, when the length of the conveyed wire in the fault period reaches the length of the stored wire prestored in the controller, the controller also feeds back the wire connection terminal cutting press 1 to stop, and the design avoids the operation of stopping the wire connection terminal cutting press 1 once the wire connection disc 6 is blocked or broken in the past, thereby being beneficial to improving the processing efficiency.
Further, the driving motors of the first traction wheel and the second traction wheel are respectively connected with the controller 20.
Further, the guide rail 24 is arranged on the vertical guide rail, two ends of the hinge shaft 25 of the liftable lower guide wheel are embedded in the guide rail, the guide rail is arranged on the vertical guide rail, two ends of the hinge shaft of the liftable lower guide wheel are provided with limiting guide wheels, and the limiting guide wheels are limited on the guide rail.
Further, a buffer rubber block 26 is disposed at the lower portion of the base, and the buffer rubber block 26 may be a silica gel block.
The controller 20 signals, sensors 21, manufacturer, model, function information of encoder 19 are as follows:
the invention relates to a working method of a wire conveying mechanism of a binding post cutting press, which comprises a binding post cutting press, a first traction wheel, a wire storage mechanism, a second traction wheel, a plurality of wire wheels and a wire conveying disc, wherein the first traction wheel, the wire storage mechanism, the second traction wheel, the plurality of wire wheels and the wire conveying disc are sequentially arranged at the front end of the binding post cutting press, and wires are sequentially conveyed to the binding post cutting press from the wire conveying disc, the plurality of wire wheels, the second traction wheel, the wire storage mechanism and the first traction wheel; the wire storage mechanism comprises a machine base and two vertical guide rails arranged on the machine base, wherein an upper guide wheel with a plurality of guide grooves is fixedly arranged at the upper parts of the two vertical guide rails, a lifting lower guide wheel with a plurality of guide grooves is arranged between the two vertical guide rails and below the upper guide wheel, wires are sequentially wound in the plurality of guide grooves between the upper guide wheel and the lifting lower guide wheel, an upper synchronous pulley and a lower synchronous pulley are respectively arranged at the upper part and the lower part of the side of one vertical guide rail, a synchronous belt is wound between the upper synchronous pulley and the lower synchronous pulley, clamping blocks connected with the lifting lower guide wheel are fixedly arranged on the synchronous belt, and a brake is arranged on a wheel shaft of the upper synchronous pulley; during operation, wires are sequentially conveyed from the wire conveying disc, the wire guide wheels, the second traction wheel, the wire storage mechanism and the first traction wheel to the wire connecting terminal cutting press, during the wire conveying disc, the joint position of the wires is accidentally disconnected, the lifting lower guide wheel can fall, the brake can drag the wheel shaft of the upper synchronous pulley, the synchronous belt is enabled not to rotate, and the lifting lower guide wheel also stops falling.
Further, a first driving motor and an encoder are arranged on the wheel shaft of the upper synchronous pulley, and the encoder and the first driving motor are connected with a controller; the wire wheel closest to the wire conveying disc in the wire wheels is provided with a sensor which is connected with the controller; the driving motors of the first traction wheel and the second traction wheel are connected with the controller; when the wire feeding device is in operation, when the wire feeding disc is accidentally stuck, the wire wheel closest to the wire feeding disc does not rotate, the first traction wheel still pulls the wire to feed the wire to the wire connecting terminal cutting machine, the distance between the upper guide wheel and the liftable lower guide wheel of the wire storage mechanism is gradually closed at the moment, namely the wire storage on the wire storage mechanism is gradually conveyed to the wire connecting terminal cutting machine, the sensor positioned on the wire wheel closest to the wire feeding disc detects that the wire wheel does not rotate, namely the signal is fed back to the controller, and the controller triggers the driving motor of the second traction wheel to stop working (the driving motor of the first traction wheel still works); after the wire clamping condition of the wire conveying disc is eliminated, the driving motor of the second traction wheel starts to work, the wire is quickly replenished in the wire storage mechanism, the lifting lower guide wheel descends, the first driving motor receives a controller signal, the first driving motor acts at a certain rotating speed, the lifting lower guide wheel is prevented from descending too fast, and the brake does not work.
The foregoing description is only of the preferred embodiments of the invention, and all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (1)
1. A working method of a wire conveying mechanism of a binding post cutting press is characterized by comprising the following steps of: the wire conveying mechanism of the binding post cutting press comprises a binding post cutting press, a first traction wheel, a wire storage mechanism, a second traction wheel, a plurality of wire guide wheels and a wire conveying disc, wherein the first traction wheel, the wire storage mechanism, the second traction wheel, the plurality of wire guide wheels and the wire conveying disc are sequentially arranged at the front end of the binding post cutting press, and wires are sequentially conveyed to the binding post cutting press from the wire conveying disc, the plurality of wire guide wheels, the second traction wheel, the wire storage mechanism and the first traction wheel; the wire storage mechanism comprises a machine base and two vertical guide rails arranged on the machine base, wherein an upper guide wheel with a plurality of guide grooves is fixedly arranged at the upper parts of the two vertical guide rails, a lifting lower guide wheel with a plurality of guide grooves is arranged between the two vertical guide rails and below the upper guide wheel, wires are sequentially wound in the plurality of guide grooves between the upper guide wheel and the lifting lower guide wheel, an upper synchronous pulley and a lower synchronous pulley are respectively arranged at the upper part and the lower part of the side of one vertical guide rail, a synchronous belt is wound between the upper synchronous pulley and the lower synchronous pulley, clamping blocks connected with the lifting lower guide wheel are fixedly arranged on the synchronous belt, and a brake is arranged on a wheel shaft of the upper synchronous pulley; the wheel shaft of the upper synchronous pulley is provided with a first driving motor and an encoder, and the encoder and the first driving motor are connected with a controller; the wire wheel closest to the wire conveying disc in the wire wheels is provided with a sensor which is connected with the controller; the driving motors of the first traction wheel and the second traction wheel are connected with the controller; the guide rail is arranged on the vertical guide rail, two ends of the hinge shaft of the liftable lower guide wheel are embedded in the guide rail channel, the guide rail is arranged on the vertical guide rail, two ends of the hinge shaft of the liftable lower guide wheel are provided with limiting guide wheels, and the limiting guide wheels are limited on the guide rail; the lower part of the machine seat is provided with a buffer rubber block; when the wire cutting machine works, wires are sequentially conveyed from a wire conveying disc, a plurality of wire guide wheels, a second traction wheel, a wire storage mechanism and a first traction wheel to a wire connecting terminal cutting machine, during the wire cutting machine, the joint position of the wires is accidentally disconnected, the lifting lower guide wheel can fall, at the moment, the brake can drag the wheel shaft of the upper synchronous pulley, so that the synchronous belt does not rotate, and the lifting lower guide wheel can stop falling; when the wire is accidentally stuck on the wire conveying disc, the wire wheel closest to the wire conveying disc does not rotate, the first traction wheel still pulls the wire to send the wire to the wire connecting terminal cutting machine, the distance between the upper guide wheel and the liftable lower guide wheel of the wire storage mechanism is gradually close at the moment, namely the wire storage on the wire storage mechanism is gradually conveyed to the wire connecting terminal cutting machine, the sensor positioned on the wire wheel closest to the wire conveying disc detects that the wire wheel does not rotate, namely the signal is fed back to the controller, the controller triggers the driving motor of the second traction wheel to stop working, and the driving motor of the first traction wheel still works; after the wire clamping condition of the wire conveying disc is eliminated, the driving motor of the second traction wheel starts to work, the wire is quickly replenished in the wire storage mechanism, the lifting lower guide wheel descends, the first driving motor receives a controller signal, the first driving motor acts at a certain rotating speed, the lifting lower guide wheel is prevented from descending too fast, and the brake does not work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810694511.6A CN108907041B (en) | 2018-06-29 | 2018-06-29 | Wire conveying mechanism of binding post cutting press and working method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810694511.6A CN108907041B (en) | 2018-06-29 | 2018-06-29 | Wire conveying mechanism of binding post cutting press and working method |
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| Publication Number | Publication Date |
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| CN108907041A CN108907041A (en) | 2018-11-30 |
| CN108907041B true CN108907041B (en) | 2024-02-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810694511.6A Active CN108907041B (en) | 2018-06-29 | 2018-06-29 | Wire conveying mechanism of binding post cutting press and working method |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115365314B (en) * | 2022-10-25 | 2023-02-14 | 徐州金虹新材料科技有限公司 | Turning device for processing tin-lead welding wire |
| CN115709253B (en) * | 2022-10-28 | 2024-07-05 | 太仓市惠得利弹簧有限公司 | High-precision material-breaking ladder brake spring coiling machine and working method thereof |
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| Publication number | Publication date |
|---|---|
| CN108907041A (en) | 2018-11-30 |
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