CN105344875A - Automatic hoop bending machine for straight steel bar - Google Patents
Automatic hoop bending machine for straight steel bar Download PDFInfo
- Publication number
- CN105344875A CN105344875A CN201510834499.0A CN201510834499A CN105344875A CN 105344875 A CN105344875 A CN 105344875A CN 201510834499 A CN201510834499 A CN 201510834499A CN 105344875 A CN105344875 A CN 105344875A
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- CN
- China
- Prior art keywords
- steel bar
- straight steel
- wheel
- frame
- extension spring
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F1/00—Bending wire other than coiling; Straightening wire
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
-
- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wire Processing (AREA)
Abstract
The invention discloses an automatic hoop bending machine for a straight steel bar. The automatic hoop bending machine structurally comprises a traction mechanism, a shearing mechanism, a bending mechanism and a feeding mechanism. The feeding mechanism comprises a lower feeding wheel and an upper feeding wheel connected with an upper press wheel swing arm. The upper press wheel swing arm comprises a connecting plate, and a connecting shaft and a hinge shaft are arranged at the two ends of the rear side face of the connecting plate respectively in a protruding manner; a piston rod of an air cylinder/oil cylinder is connected with the end of the connecting shaft; the hinge shaft is hinged in a supporting hole in a feeding frame; and the upper feeding wheel is arranged on the front side face of the connecting plate in a protruding manner. The automatic hoop bending machine has the beneficial effects that power is provided for the feeding mechanism and the traction mechanism through one power source; the straight steel bar smoothly enters the traction mechanism from the feeding mechanism and a wire guide mechanism at the inlet end of a rack, and a straightening mechanism which is complex and occupies large equipment space is omitted; a detection plate, combined with a detection switch, in the wire guide mechanism and components related to the detection plate are simple in structure and flexible in action; and materials used for products can be accurately calculated, a reference is provided for scientifically calculating raw materials and tailings, and waste of the steel bar is reduced.
Description
Technical field
What the present invention relates to is steel-bar automatic hoop bender, particularly be exclusively used in processing straight steel bar steel-bar automatic hoop bender.
Technical background
Steel-bar automatic hoop bender is automatic processing device wire rod reinforcing bar continuous bend being processed into difformity stirrup, and prior art steel-bar automatic hoop bender comprises: straightening mechanism, haulage gear, bending mechanism, cutting mechanism.
In prior art, usually select wire rod reinforcing bar as the raw material of steel-bar automatic hoop bender, therefore the reinforcing bar arrival end on steel-bar automatic hoop bender must arrange the straightening mechanism to bending wire rod reinforcing bar advanced person row aligning, carries out following process again to the straight steel bar after aligning.
There is following defect in above-mentioned prior art steel-bar automatic hoop bender: first, the Structure adaptation processing wire rod reinforcing bar of above-mentioned prior art steel-bar automatic hoop bender, inadaptable processing straight steel bar; Secondly, lack Suan Liao mechanism, namely lack the foundation calculating materials length and finished product quantity.People thirst for occurring a kind of steel-bar automatic hoop bender adapting to process straight steel bar.
Summary of the invention
The object of the invention is to overcome above-mentioned the deficiencies in the prior art, provide a kind of and adapt to processing straight steel bar, structure is simple, easy to use and have a kind of straight steel bar automatic hoop bender of counting device.
The technical scheme solved the problems of the technologies described above is: a kind of straight steel bar automatic hoop bender, described straight steel bar automatic hoop bender comprises: in frame, be disposed with haulage gear, cutting mechanism and bending mechanism according to straight steel bar throughput direction, also comprise the feed mechanism being positioned at frame arrival end before being arranged on haulage gear, described feed mechanism comprises: to be positioned at below straight steel bar and send wheel under connecting rotating power source, to be positioned at above straight steel bar and the swing arm of connection upper pressure wheel on send wheel to; Described upper pressure wheel swing arm comprises: connecting plate, protrudes respectively be provided with connecting axle and jointed shaft at the two ends of connecting plate trailing flank; Connecting axle end connects the piston rod of cylinder/oil cylinder, and the cylinder body of cylinder/oil cylinder is arranged in frame; Jointed shaft be hinged on fix with frame send in the supported hole of frame; Protrude at the leading flank of connecting plate and be provided with upper pressure wheel fixed axis, on upper pressure wheel fixed axis end is hinged, send wheel to; Upper pressure wheel fixed axis is arranged between connecting axle and jointed shaft.
Preferred version is: send the rotating power source that wheel connects under described to and comprise: under send wheel to and be hinged on down the one end sending axle to, under send axle hinged support to sending in frame; Under send axle to the other end driven sprocket is housed, chain is sleeved on driven sprocket and drive sprocket, and drive sprocket one end is arranged on the output shaft of motor.
Preferred version is: the frame between haulage gear and feed mechanism is also provided with conducting mechanism, and described conducting mechanism comprises: be arranged on a filament guiding seat in frame and sense switch; Protrude at filament guiding seat leading flank and be provided with the how lower godet roller be positioned at below straight steel bar and the upper godet roller be positioned at above straight steel bar and detect wheel; Detect the central shaft of wheel through being fixed in the hole of check-out console one end after the adjustment through hole of filament guiding seat, check-out console is arranged on the trailing flank of adjacent filament guiding seat, and check-out console one end also connects one end of extension spring, and the other end of extension spring is arranged on filament guiding seat; The check-out console other end is hinged on the detection back shaft one end of protruding and being fixed on filament guiding seat trailing flank; Described sense switch is positioned at when detecting wheel contact straight steel bar, drives check-out console to swing the position of contact detection switch.
Preferred version is: the position be separately positioned between adjacent two lower godet rollers is taken turns in described upper godet roller and detection.
Preferred version is: one end of described extension spring is arranged on extension spring fixed bar one end, and the other end of extension spring fixed bar is fixed on check-out console one end; The other end of extension spring is arranged on one end of extension spring installation shaft, and the other end of extension spring installation shaft is fixed on filament guiding seat.
The invention has the beneficial effects as follows: the present invention overcomes the defect of prior art, the present invention by a power source for feed mechanism and haulage gear provide power; Straight steel bar of the present invention enters into haulage gear smoothly from the feed mechanism of frame arrival end, conducting mechanism, saves complicated and takies the straightening mechanism of equipment large space; The check-out console be combined with sense switch in conducting mechanism of the present invention and associated components structure simple, being active in one's movements, by automatically calculating material system in sense switch connection control device, accurate calculation product materials can being realized, for scientific algorithm raw material, tailing provide foundation, decrease the waste to reinforcing bar.
Accompanying drawing explanation
Fig. 1 is front view of the present invention;
Fig. 2 is the top view of Fig. 1;
Fig. 3 is the A-A sectional view of Fig. 1, shows feed mechanism internal structure in figure;
Fig. 4 is the B-B sectional view of Fig. 1;
Fig. 5 is sense switch in Fig. 4 right view and check-out console contact condition schematic diagram.
" in accompanying drawing, sequence number illustrates "
1: send frame to; 2: upper pressure wheel swing arm; 2a: jointed shaft; 2b: upper pressure wheel fixed axis; 2c: connecting axle; 2d: connecting plate; 3: above send wheel to; 4: under send wheel to; 5: the first oiliness bearings; 6: lead a block; 7a: upper godet roller; 7b: lower godet roller; 8: filament guiding seat; 8a: detect back shaft; 8b: adjustment through hole; 9: sense switch; 10: check-out console; 10a: the central shaft detecting wheel; 10b: detect wheel; 10c: extension spring fixed bar; 11: haulage gear; 11a: traction wheel; 12: cutting mechanism; 13: bending mechanism; 14: straight steel bar; 15: traction driving shaft; 16: pressing plate; 17: extension spring installation shaft; 18: extension spring; 19: chain; 20: cylinder/oil cylinder; 21: frame; 22: motor; 23: drive sprocket; 24: driven sprocket; 25: feed mechanism; 26: conducting mechanism; 27: under send axle to; 28: bearing; 29: the second oiliness bearings; 30: gland; P: throughput direction.
Detailed description of the invention
Below embodiments of the invention are described in further detail.
As shown in the figure, the present invention discloses a kind of straight steel bar automatic hoop bender, and described straight steel bar automatic hoop bender comprises: in frame 21, be disposed with haulage gear 11, cutting mechanism 12 and bending mechanism 13 according to straight steel bar 14 throughput direction P.
The present invention also comprises the feed mechanism 25 being arranged on and being positioned at frame 21 arrival end before haulage gear 11 as shown in Figure 1 and Figure 2, and described feed mechanism 25 comprises: be positioned at straight steel bar 14 below and send wheel 4 under connecting rotating power source, be positioned at straight steel bar 14 above and connect upper pressure wheel swing arm 2 on send wheel 3 to.
Described upper pressure wheel swing arm 2 comprises: connecting plate 2d, protrudes respectively be provided with connecting axle 2c and jointed shaft 2a at the two ends of connecting plate 2d trailing flank; Connecting axle 2c end connects the piston rod of cylinder or oil cylinder 20, and the cylinder body of cylinder or oil cylinder 20 is arranged in frame 21; Jointed shaft 2a is hinged in the supported hole sending frame 1 to fixing with frame 21 by the second oiliness bearing 29; Protrude at the leading flank of connecting plate 2d and be provided with upper pressure wheel fixed axis 2b, upper pressure wheel fixed axis 2b end is by bearing hinge connection being sent wheel 3 to; Upper pressure wheel fixed axis 2b is arranged between connecting axle 2c and jointed shaft 2a.
Send the rotating power source that wheel 4 connects under described to comprise: under send wheel 4 to and be hinged on down the one end sending axle 27 to, under send axle 27 to by bearing 28 hinged support sending in frame 1; Under send axle 27 to the other end driven sprocket 24 is housed, chain 19 is sleeved on driven sprocket 24 and drive sprocket 23, and drive sprocket 23 one end is arranged on the output shaft of motor 22.
Frame 21 between haulage gear 11 and feed mechanism 25 is also provided with conducting mechanism 26, and described conducting mechanism 26 comprises: be arranged on a filament guiding seat 8 in frame 21 and sense switch 9.
Protrude at described filament guiding seat 8 leading flank and be provided with the how lower godet roller 7b be positioned at below straight steel bar 14 and the upper godet roller 7a be positioned at above straight steel bar 14 and detect wheel 10b; Detect the central shaft 10a of wheel through being weldingly fixed in the hole of check-out console 10 one end after the adjustment through hole 8b of filament guiding seat 8, check-out console 10 is arranged on the trailing flank of adjacent filament guiding seat 8, check-out console 10 one end also connects one end of extension spring 18, and the other end of extension spring 18 is arranged on filament guiding seat 8; Check-out console 10 other end is hinged on the detection back shaft 8a one end of protruding and being fixed on filament guiding seat 8 trailing flank by the first oiliness bearing 5.
In particular, check-out console 10 other end is hinged on jointed shaft 8a one end by the first oiliness bearing 5, and the jointed shaft 8a other end is weldingly fixed in the hole of filament guiding seat 8.
Described sense switch 9 is positioned at when detecting wheel 10b and contacting straight steel bar 14, drives check-out console 10 to swing the position of contact detection switch 9.
Described upper godet roller 7a and detection wheel 10b is separately positioned on the position between adjacent two lower godet roller 7b.
One end of described extension spring 18 is arranged on extension spring fixed bar 10c one end, and the other end of extension spring fixed bar 10c is fixed on check-out console 10 one end; The other end of extension spring 18 is arranged on one end of extension spring installation shaft 17, and the other end of extension spring installation shaft 17 is fixed on filament guiding seat 8.
In particular, drive sprocket 23 central shaft one end is arranged on the output shaft of motor 22, the drive sprocket 23 central shaft other end connects traction driving shaft 15 one end, traction driving shaft 15 other end installs traction wheel 11a, and namely motor 22 can drive the action of multiple mechanism on straight steel bar automatic hoop bender of the present invention.
Described sense switch 9 is arranged on filament guiding seat 8 trailing flank.When not carrying straight steel bar 14, detecting wheel 10b and being in the position exceeding straight steel bar 14 center line under extension spring 18 acts on; When feed mechanism 25 drives straight steel bar 14 to walk conducting mechanism 26 through when detecting wheel 10b and lower godet roller 7b, straight steel bar 14 can upwardly detect wheel 10b, detect wheel 10b drives the central shaft 10a of detection wheel and the rich back shaft 8a that detects of check-out console 10 to swing simultaneously, the check-out console 10 now swung can touch sense switch 9, and sense switch 9 starts the length counting reinforcing bar.
A block 6 of leading in Fig. 1 is arranged in frame 21, leads a block 6 and supports straight steel bar 14 and pass straight through; Jointed shaft 2a in Fig. 3 sends on frame 1 by being hinged on by pressing plate 16 containing bearing 29; Check-out console 10 in Fig. 4 is glanded 30 by the first oiliness bearing 5 and is hinged on detection jointed shaft 8a.
Below the course of work of the present invention is described:
When the present invention works, motor 22 drives haulage gear 11 to work, drive sprocket 23 on haulage gear 11 drives driven sprocket 24 to rotate by chain 19, thus send wheel 4 to and rotate under driving, be arranged on down send to above wheel 4 on send wheel 3 to and stretch out by cylinder or oil cylinder 20 pressure control being sent wheel 3 to, when on send to when wheel 3 is depressed, straight steel bar 14 to be contacted under send on wheel 4, straight steel bar 14 to be moved along throughput direction P by frictional force and send to, straight steel bar 14 arrives conducting mechanism 26 through leading a block 6;
When touching the detection wheel 10b in conducting mechanism 26 when straight steel bar 14, detect wheel 10b upwards swing and drive check-out console 10 upwards to swing, check-out console 10 touches sense switch 9, sense switch 9 will receive Signal transmissions in electric-control system (not shown), carry out count detection to straight steel bar 14; When straight steel bar 14 arrives haulage gear 11, haulage gear 11 continues traction straight steel bar 14 and moves to bending mechanism 13, now, feed mechanism 25 stops sending straight steel bar 14 to and works, namely in the cylinder in feed mechanism 25 or oil cylinder 20, piston rod retraction drives and sends wheel 3 to and leave straight steel bar 14, directly draw straight steel bar 14 by haulage gear 11 and be transported to bending mechanism 13 along throughput direction P, after straight steel bar 14 is bent to the stirrup of various shape by bending mechanism 13, cutting mechanism 12 cuts off straight steel bar 14.
Claims (5)
1. a straight steel bar automatic hoop bender, described straight steel bar automatic hoop bender comprises: in frame (21), be disposed with haulage gear (11) according to straight steel bar (14) throughput direction (P), cutting mechanism (12) and bending mechanism (13), it is characterized in that, also comprise the feed mechanism (25) being positioned at frame (21) arrival end before being arranged on haulage gear (11), described feed mechanism (25) comprising: be positioned at straight steel bar (14) below and send wheel (4) under connecting rotating power source, be positioned at straight steel bar (14) above and connect upper pressure wheel swing arm (2) on send wheel (3) to, described upper pressure wheel swing arm (2) comprising: connecting plate (2d), protrudes respectively be provided with connecting axle (2c) and jointed shaft (2a) at the two ends of connecting plate (2d) trailing flank, connecting axle (2c) end connects the piston rod of cylinder/oil cylinder (20), and the cylinder body of cylinder/oil cylinder (20) is arranged in frame (21), jointed shaft (2a) is hinged in the supported hole sending frame (1) to fixing with frame (21), protrude at the leading flank of connecting plate (2d) and be provided with upper pressure wheel fixed axis (2b), on upper pressure wheel fixed axis (2b) end is hinged, send wheel (3) to, upper pressure wheel fixed axis (2b) is arranged between connecting axle (2c) and jointed shaft (2a).
2. according to a kind of straight steel bar automatic hoop bender described in claim 1, it is characterized in that, send the rotating power source that wheel (4) connects under described to comprise: under send wheel (4) to and be hinged on down the one end sending axle (27) to, under send axle (27) hinged support to sending in frame (1); Under send axle (27) to the other end driven sprocket (24) is housed, chain (19) is sleeved on driven sprocket (24) and drive sprocket (23), and drive sprocket (23) one end is arranged on the output shaft of motor (22).
3. according to a kind of straight steel bar automatic hoop bender described in claim 1, it is characterized in that, frame (21) between haulage gear (11) and feed mechanism (25) is also provided with conducting mechanism (26), and described conducting mechanism (26) comprising: be arranged on a filament guiding seat (8) in frame (21) and sense switch (9); Protrude at filament guiding seat (8) leading flank and be provided with the how lower godet roller (7b) be positioned at below straight steel bar (14) and the upper godet roller (7a) be positioned at above straight steel bar (14) and detect wheel (10b); The central shaft (10a) detecting wheel is fixed in the hole of check-out console (10) one end through after the adjustment through hole (8b) of filament guiding seat (8), check-out console (10) is arranged on the trailing flank of adjacent filament guiding seat (8), check-out console (10) one end also connects one end of extension spring (18), and the other end of extension spring (18) is arranged on filament guiding seat (8); Check-out console (10) other end is hinged on protrusion and is fixed on detection back shaft (8a) one end on filament guiding seat (8) trailing flank; Described sense switch (9) is positioned at when detecting wheel (10b) and contacting straight steel bar (14), drives check-out console (10) to swing the position of contact detection switch (9).
4. according to a kind of straight steel bar automatic hoop bender described in claim 3, it is characterized in that, described upper godet roller (7a) and detection wheel (10b) are separately positioned on the position between adjacent two lower godet rollers (7b).
5. according to a kind of straight steel bar automatic hoop bender described in claim 3, it is characterized in that, one end of described extension spring (18) is arranged on extension spring fixed bar (10c) one end, and the other end of extension spring fixed bar (10c) is fixed on check-out console (10) one end; The other end of extension spring (18) is arranged on one end of extension spring installation shaft (17), and the other end of extension spring installation shaft (17) is fixed on filament guiding seat (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510834499.0A CN105344875B (en) | 2015-11-25 | 2015-11-25 | A kind of straight steel bar automatic hoop bender |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510834499.0A CN105344875B (en) | 2015-11-25 | 2015-11-25 | A kind of straight steel bar automatic hoop bender |
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| CN105344875A true CN105344875A (en) | 2016-02-24 |
| CN105344875B CN105344875B (en) | 2017-06-23 |
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| CN201510834499.0A Active CN105344875B (en) | 2015-11-25 | 2015-11-25 | A kind of straight steel bar automatic hoop bender |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105880418A (en) * | 2016-05-11 | 2016-08-24 | 建科机械（天津）股份有限公司 | Feeding mechanism and automatic hoop bending machine |
| CN106040909A (en) * | 2016-07-15 | 2016-10-26 | 建科机械（天津）股份有限公司 | Automatic hoop bending machine for steel bars |
| CN106077360A (en) * | 2016-07-27 | 2016-11-09 | 零八电子集团四川天源机械有限公司 | Automatically send cut shaped device for producing the wire of LED electricity-saving lamp |
| CN107716786A (en) * | 2017-10-28 | 2018-02-23 | 张晓双 | A kind of cable straightening device |
| CN108941394A (en) * | 2018-06-15 | 2018-12-07 | 建科机械（天津）股份有限公司 | A kind of feed mechanism and welding machine of mesh of welding machine of mesh |
| CN109550871A (en) * | 2019-01-14 | 2019-04-02 | 建科机械（天津）股份有限公司 | It is a kind of to be automatically positioned end reinforced curved arc bending machine |
| CN111644537A (en) * | 2020-05-21 | 2020-09-11 | 建科机械（天津）股份有限公司 | Reinforcing steel bar processing device of wire rewinding machine |
| CN113210528A (en) * | 2021-04-28 | 2021-08-06 | 玖创建设有限公司 | Steel bar bending equipment for building construction and bending method thereof |
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| US7624608B1 (en) * | 2009-02-05 | 2009-12-01 | Marcus Karty | Rebar bending device |
| CN202571084U (en) * | 2012-03-13 | 2012-12-05 | 建科机械（天津）股份有限公司 | Automatic steel reinforcement hoop bending machine with shearing mechanisms arranged on two sides of steel reinforcement moving mechanism respectively |
| CN204470467U (en) * | 2015-03-21 | 2015-07-15 | 福建建超建设集团有限公司 | A kind of stirrup bender |
| CN205217848U (en) * | 2015-11-25 | 2016-05-11 | 建科机械（天津）股份有限公司 | Automatic curved hoop machine of vertical bar reinforcing bar |
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Patent Citations (4)
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| US7624608B1 (en) * | 2009-02-05 | 2009-12-01 | Marcus Karty | Rebar bending device |
| CN202571084U (en) * | 2012-03-13 | 2012-12-05 | 建科机械（天津）股份有限公司 | Automatic steel reinforcement hoop bending machine with shearing mechanisms arranged on two sides of steel reinforcement moving mechanism respectively |
| CN204470467U (en) * | 2015-03-21 | 2015-07-15 | 福建建超建设集团有限公司 | A kind of stirrup bender |
| CN205217848U (en) * | 2015-11-25 | 2016-05-11 | 建科机械（天津）股份有限公司 | Automatic curved hoop machine of vertical bar reinforcing bar |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105880418A (en) * | 2016-05-11 | 2016-08-24 | 建科机械（天津）股份有限公司 | Feeding mechanism and automatic hoop bending machine |
| CN106040909A (en) * | 2016-07-15 | 2016-10-26 | 建科机械（天津）股份有限公司 | Automatic hoop bending machine for steel bars |
| CN106040909B (en) * | 2016-07-15 | 2018-04-06 | 建科机械（天津）股份有限公司 | A kind of steel-bar automatic hoop bender |
| CN106077360A (en) * | 2016-07-27 | 2016-11-09 | 零八电子集团四川天源机械有限公司 | Automatically send cut shaped device for producing the wire of LED electricity-saving lamp |
| CN106077360B (en) * | 2016-07-27 | 2017-09-22 | 零八一电子集团四川天源机械有限公司 | Automatically send for producing the wire of LED electricity-saving lamps and cut shaped device |
| CN107716786A (en) * | 2017-10-28 | 2018-02-23 | 张晓双 | A kind of cable straightening device |
| CN107716786B (en) * | 2017-10-28 | 2018-11-27 | 谢瑞珠 | A kind of cable straightening device |
| CN108941394A (en) * | 2018-06-15 | 2018-12-07 | 建科机械（天津）股份有限公司 | A kind of feed mechanism and welding machine of mesh of welding machine of mesh |
| CN109550871A (en) * | 2019-01-14 | 2019-04-02 | 建科机械（天津）股份有限公司 | It is a kind of to be automatically positioned end reinforced curved arc bending machine |
| CN111644537A (en) * | 2020-05-21 | 2020-09-11 | 建科机械（天津）股份有限公司 | Reinforcing steel bar processing device of wire rewinding machine |
| CN113210528A (en) * | 2021-04-28 | 2021-08-06 | 玖创建设有限公司 | Steel bar bending equipment for building construction and bending method thereof |
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| CN105344875B (en) | 2017-06-23 |
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