CN108213266A - Three station reinforcing bar automatic moulding machines - Google Patents
Three station reinforcing bar automatic moulding machines Download PDFInfo
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- CN108213266A CN108213266A CN201810148419.XA CN201810148419A CN108213266A CN 108213266 A CN108213266 A CN 108213266A CN 201810148419 A CN201810148419 A CN 201810148419A CN 108213266 A CN108213266 A CN 108213266A
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- oil
- hydraulic
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- reinforcing bar
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- 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
- B21F1/004—Bending wire other than coiling; Straightening wire by means of press-type tooling
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
The invention discloses three station reinforcing bar automatic moulding machines, including rack, there are three the bending mechanisms for being used for moment reinforcement for installing in the rack, and the hydraulic bending control system for driving three bending mechanism actions, the bending mechanism includes the positive bending mechanism being arranged in order, positive and negative compound bending mechanism and back-flexing mechanism, central pin shaft is respectively arranged on the bending mechanism, the curved pin rotated around central pin shaft, drive the hydraulic cylinder of curved pin action, the hydraulic cylinder of wherein described positive and negative compound bending mechanism is positive and negative two-way cylinder, the positive and negative two-way cylinder is rotated in the forward direction or is reversely rotated by initial position by pin curved described in actuator drives.The three station reinforcing bar automatic moulding machines of the present invention under the premise of ensureing that functions of the equipments are constant, reduce the setting of bending mechanism by applying positive and negative compound bending mechanism, simplify structure and reduce equipment volume, and improve accuracy and the precision of bending.
Description
Technical field
The present invention relates to reinforcing steel bar hoop bending apparatus fields, and in particular to a kind of three station reinforcing bar automatic moulding machines.
Background technology
Various reinforcing bars are usually used in architectural engineering, stirrup is also one kind of reinforcing bar, is mainly used for fixed main reinforcement
Position and various reinforcing bars inside building element is made to form framework of steel reinforcement, stirrup for building has various shapes, using pole
To be extensive, wherein most commonly seen is that rectangular stirrup skeleton frame is bent by straight steel bar, there are five curved for the stirrup skeleton frame
Angle usually needs first two bent angles of bending, then reverses end for end two bent angles of the bending other end, last by hand at the middle part of reinforcing bar
The last one bent angle of bending, carrying out five Bending Processings altogether makes the rectangular frame of bending reinforcement obtain stirrup skeleton frame, works
Intensity is big, and working efficiency is low.
In order to improve the efficiency of reinforcing steel bar hoop bending, applicant is dedicated to researching and developing the anglebender of hydraulic control, and achieves
Certain achievement has applied for multinomial patent, the patent of invention " being used for the molding automatic moulding machine of bar one-time " of application in such as 2013
And the patent of invention " new reinforcing steel bar hoop bender " of application in 2015.There are five bar folders for setting on the former automatic moulding machine
Structure, component is more, and the volume of complete machine is larger；There are three moveable bending mechanism, structures for setting on the anglebender of the latter
And action is more complicated.On this basis, better reinforcing bar bending device is artificially pursued in application, and one kind is being obtained just by continuously improving
Anti- bidirectional hydraulic bending mechanism, and positive and negative bidirectional hydraulic bending mechanism is applied on anglebender, obtain three station reinforcing bars
Automatic moulding machine.
Invention content
The present invention provides a kind of three station reinforcing bar automatic moulding machines, and repeatedly bending can be carried out to reinforcing bar makes its molding.
The technical solution adopted in the present invention is：
Three station reinforcing bar automatic moulding machines, including rack, there are three the bendings for being used for moment reinforcement for installing in the rack
Mechanism and the hydraulic bending control system for driving three bending mechanism actions, the bending mechanism include being arranged in order
Positive bending mechanism, positive and negative compound bending mechanism and back-flexing mechanism,
Curved pin, the curved pin of driving for central pin shaft is respectively arranged on the bending mechanism, rotating around central pin shaft act
Hydraulic cylinder,
The hydraulic cylinder of wherein described positive and negative compound bending mechanism is positive and negative two-way cylinder, and the positive and negative two-way cylinder passes through
Curved pin is rotated in the forward direction or is reversely rotated by initial position described in actuator drives.
As a further improvement of the above technical scheme, the hydraulic bending control system includes multiple control valves and liquid
Remote controlled with signals device is pressed,
Multiple control valves cascade successively, wherein the control valve positioned at the first order connects oil pump, each control valve point
Not Lian Jie a hydraulic cylinder, the control valve controls corresponding hydraulic cylinder action or resets,
The hydraulic pressure signal remote controler is arranged on the Cylinder Plunger stroke of hydraulic cylinder, the connection control of hydraulic pressure signal remote controler
Valve processed changes the state of control valve according to the action of hydraulic cylinder.
As a further improvement of the above technical scheme, control centre's pin is provided between the control valve and hydraulic cylinder
The flexible piggybacking valve that axis stretches.
As a further improvement of the above technical scheme, the control valve includes switch valve and reversal valve, the switch valve
By commutating, oil duct connects reversal valve,
Hydraulic oil inlet and hydraulic oil outlet are provided on the switch valve, the hydraulic oil inlet connects oil pump or upper one
The hydraulic oil outlet of grade switch valve, the hydraulic oil inlet or oil of the hydraulic oil outlet connection next stage switch valve of the switch valve
Case, the spool action of the switch valve make the hydraulic oil inlet of switch valve switch company between commutation oil duct and hydraulic oil outlet
It connects,
Unloading port and two oil cylinder interfaces for connecting two end interface of hydraulic cylinder, institute are provided on the reversal valve
Stating the spool action of reversal valve makes oil cylinder interface switch connection, and the shape of two oil cylinder interfaces between commutation oil duct and unloading port
State is opposite.
As a further improvement of the above technical scheme, several state transformation interfaces are provided on the switch valve, it is described
Hydraulic pressure signal remote controler connection status becomes alias.
As a further improvement of the above technical scheme, Cylinder Plunger is provided in the oil pocket of the positive and negative two-way cylinder,
The oil sealing of the Cylinder Plunger is located at the middle part of oil pocket, and the rear end of the oil pocket is provided with positive oil circuit interface, the front end of oil pocket
Reversed oil circuit interface is provided with, the forward direction oil circuit interface and reversed oil circuit interface are located at the oil sealing both sides of Cylinder Plunger respectively；
The hydraulic oil entered from positive oil circuit interface pushes Cylinder Plunger to move forward, and curved pin is driven to rotate in the forward direction, is connect from reversed oil circuit
The hydraulic oil that mouth enters pushes Cylinder Plunger to move backward, and curved pin is driven to reversely rotate.
As a further improvement of the above technical scheme, the shifting material device of automatic push reinforcing bar is provided in the rack.
As a further improvement of the above technical scheme, the material device that moves includes what is arranged along bending mechanism orientation
Sliding rail, the shifting trolley being provided with for pushing reinforcing bar is slided on the sliding rail, and being provided with driving in the rack moves trolley
The motor of action, the motor drive shifting trolley to be moved forward and backward along sliding rail by belt wheel transmission mechanism.
As a further improvement of the above technical scheme, it is set on the hydraulic cylinder Cylinder Plunger stroke of the bending mechanism
There is the travel switch that driving motor acts.
As a further improvement of the above technical scheme, the scale that control shifting trolley stroke is provided on the sliding rail changes
To switch, the scale reversing switch connects driving motor.
As a further improvement of the above technical scheme, the stack device that has dislocation is set on the positive bending mechanism.
As a further improvement of the above technical scheme, sub-barrier, the auxiliary gear are provided on the bending mechanism
Plate is arranged on the one or both sides of curved pin, and sub-barrier cooperation central pin shaft is supported with curved pin-shaped into 3 stress, ensures reinforcing bar
The accuracy and precision of bending.
Further, the sub-barrier in the positive and negative compound bending mechanism includes left avoidance baffle and right avoidance baffle, left
It avoids baffle and the right opposite face for avoiding baffle is respectively arranged with linkage rack, linkage is provided between the linkage rack of the two
Tooth, the linkage tooth are engaged respectively with left avoidance baffle and the right linkage rack for avoiding baffle, are set below the right avoidance baffle
It is equipped with and drives the right avoidance barrier driving oil cylinder for avoiding baffle and moving up and down.Left avoidance baffle and right avoidance baffle by rack and
Gear realizes incorgruous linkage, and when right avoidance baffle rises, left avoidance baffle declines, when right avoidance baffle declines, left avoidance
Baffle rises.It is left avoid baffle and it is right avoid baffle setting can make positive and negative compound bending mechanism positive bending reinforcing steel bar and reversely
Can obtain third supporting point during bending reinforcing steel bar, at the same it is inoperative avoid avoiding automatically for baffle, avoid to reinforcing bar
The action of bending impacts.
The beneficial effects of the invention are as follows：
Compare the prior art, three station reinforcing bar automatic moulding machines of the invention by apply positive and negative compound bending mechanism,
Under the premise of ensureing that functions of the equipments are constant, the setting of bending mechanism is reduced, simplify structure and reduces equipment volume, and improve bending
Accuracy and precision.
Description of the drawings
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Fig. 1 and Fig. 2 is the structure diagram of three station reinforcing bar automatic moulding machines.
Fig. 3 is the structure diagram of positive and negative compound bending mechanism.
Fig. 4 is the structure diagram of positive and negative two-way cylinder.
Fig. 5 is the structure diagram of the avoidance baffle in positive and negative compound bending mechanism.
Fig. 6 is the structure diagram for moving material device.
Fig. 7 to Figure 13 is the action flow chart of three station reinforcing bar automatic moulding machines.
Figure 14 is the schematic diagram of the sub-barrier on positive bending mechanism.
Figure 15 is the schematic diagram of the sub-barrier in back-flexing mechanism.
Specific embodiment
The three station reinforcing bar automatic moulding machines of the present invention are made with preferred embodiment below in conjunction with the accompanying drawings further details of
Explanation.
With reference to Fig. 1, Fig. 2, Fig. 1 and Fig. 2 provide a kind of preferred embodiment of three stations reinforcing bar automatic moulding machine, including machine
Frame 1, there are three the bending mechanism for being used for moment reinforcement, the bending mechanism includes being arranged in order just for installing in the rack 1
To bending mechanism 2, positive and negative compound bending mechanism 3 and back-flexing mechanism 4.Be additionally provided in the rack 1 shifting material device 5 with
And the hydraulic bending control system 7 for driving the action of three bending mechanisms, on the forward direction bending mechanism 2 setting have dislocation folded
Expect device 6.
Curved pin, the curved pin of driving for central pin shaft is respectively arranged on the bending mechanism, rotating around central pin shaft act
Hydraulic cylinder, the Cylinder Plunger of the hydraulic cylinder are connected with drive rack, and drive rack is driven by engaged gear
Curved pin rotation.Wherein, positive bending mechanism 2 and back-flexing mechanism 4 are only capable of carrying out reinforcing bar the bending in one direction, and positive and negative
Compound bending mechanism 3 can carry out reinforcing bar positive bending and reversely bending.
With reference to Fig. 3, Fig. 4, the hydraulic cylinder of the positive and negative compound bending mechanism 3 is positive and negative two-way cylinder 10, described positive and negative
Cylinder Plunger 15 is provided in the oil pocket 16 of two-way cylinder 10, the oil sealing of Cylinder Plunger 15 is located at the middle part of oil pocket 16, oil pocket 16
Rear end be provided with positive oil circuit interface 17, the front end of oil pocket 16 is provided with reversed oil circuit interface 18, the forward direction oil circuit interface
17 and reversed oil circuit interface 18 respectively be located at Cylinder Plunger 15 oil sealing both sides.When curved pin 9 is located at initial position, Cylinder Plunger
15 are located at the middle part of oil pocket 16, and the hydraulic oil entered from positive oil circuit interface 17 pushes Cylinder Plunger 15 to move forward, and driving is curved
Pin 9 is rotated in the forward direction around central pin shaft 8, and positive bending can be carried out to reinforcing bar；The hydraulic oil entered from reversed oil circuit interface 18 pushes
Cylinder Plunger 15 moves backward, and curved pin 9 is driven to reversely rotate, and reinforcing bar reversely can be bent.
Further, with reference to Fig. 3, Figure 14 and Figure 15, sub-barrier is provided on the bending mechanism, as shown in figure 14, just
First sub-barrier 28 is set in the left side of curved pin 9 to bending mechanism 2, as shown in figure 15, back-flexing mechanism 4 is in curved pin 9
Right side sets the second sub-barrier 29, and sub-barrier cooperation central pin shaft is supported with curved pin-shaped into 3 stress, ensures that reinforcing bar is curved
The accuracy and precision of folding.As shown in Figure 3 and Figure 5, the sub-barrier of the positive and negative compound bending mechanism 3 is set as avoiding-type,
It avoids impacting the bending action of reinforcing bar.Sub-barrier in the positive and negative compound bending mechanism 3 includes being located at curved 9 right side of pin
The right avoidance baffle 13 of side and the left avoidance baffle 14 positioned at curved 9 left side of pin, the right avoidance baffle 13 and left avoidance baffle
14 opposite face is respectively arranged with linkage rack 19,20, and linkage tooth 21 is provided between the linkage rack 19,20, described
Moving teeth 21 is engaged respectively with linkage rack 19,20, and right avoidance baffle 13 and left avoidance baffle 14 is made to realize linkage, the right avoidance
13 lower section of baffle, which is provided with, avoids barrier driving oil cylinder 12.Barrier driving oil cylinder 12 is avoided to link with positive and negative two-way cylinder 10, when
During positive and negative 3 moment reinforcement of compound bending mechanism, reinforcing bar is withstood in corresponding avoidance baffle rising, avoids baffle and curved pin 9, centrepin
Axis 8 forms supported at three point stress to reinforcing bar, makes the bending precision higher of reinforcing bar, and process is more smooth；And at this moment another piece of avoidance
Baffle declines, and the homing action of curved pin 9 is avoided.
The hydraulic bending control system 7 includes multiple control valves and hydraulic pressure signal remote controler.
The control valve is arranged on the oil circuit between oil pump and hydraulic cylinder, and each control valve connects a hydraulic pressure respectively
Oil cylinder, and corresponding hydraulic cylinder is controlled to act or reset.It is connected on the control valve including switch valve and reversal valve, it is described
Switch valve connects reversal valve by the oil duct that commutates.Hydraulic oil inlet and hydraulic oil outlet, the liquid are provided on the switch valve
Pressure oil import connects the hydraulic oil outlet of oil pump or upper level switch valve, and the hydraulic oil outlet connection next stage of the switch valve is opened
The hydraulic oil inlet of valve or fuel tank (emptying) are closed, the spool action of the switch valve makes the hydraulic oil inlet of switch valve in commutation oil
Switch connection between road and hydraulic oil outlet.Unloading port is provided on the reversal valve and is terminated for connecting hydraulic cylinder two
Two oil cylinder interfaces of mouth, the spool action of the reversal valve make oil cylinder interface switch company between commutation oil duct and unloading port
It connects, and the state of two oil cylinder interfaces is opposite.Multiple control valves cascade successively, wherein on the control valve of the first order
Hydraulic oil inlet connection oil pump, other control valves hydraulic oil inlet connection upper level switch valve hydraulic oil outlet.
Several state transformation interfaces, the hydraulic pressure signal remote control are provided on the switch valve and reversal valve of the control valve
Device connection status becomes alias.The hydraulic pressure signal remote controler is arranged on the Cylinder Plunger stroke of hydraulic cylinder, collects hydraulic pressure
The action signal of oil cylinder and the state for changing control valve according to the action signal.
Further, as shown in figure 3, being provided with that control centre's axis pin 8 is flexible to be stretched between the control valve and hydraulic cylinder
Contracting piggybacking valve 11.
With reference to Fig. 6, the material device 5 that moves includes the sliding rail 22 arranged along bending mechanism orientation, on the sliding rail 22
The shifting trolley 23 being provided with for pushing reinforcing bar is slided, driving is provided in the rack 1 and moves the motor that trolley 23 acts
24, the motor 24 drives shifting trolley 23 to be moved forward and backward along sliding rail 22, and set on sliding rail 22 by belt wheel transmission mechanism 25
There is the draft gear 26 that traction moves trolley 23.Further, it is set on the hydraulic cylinder Cylinder Plunger stroke of the bending mechanism
There is the travel switch that driving motor 24 acts, and the scale reversing switch that control moves 23 stroke of trolley is provided on sliding rail 22
27, the travel switch and scale reversing switch 27 connect driving motor 24 respectively.
The workflow of three station reinforcing bar automatic moulding machines, all hydraulic are shown with reference to Fig. 7 to Figure 13, Fig. 7 to Figure 13
The motion flow of the mechanism of driving is controlled by hydraulic bending control system.As shown in fig. 7, the reinforcing bar is placed on and arranges successively
In the positive bending mechanism 2 of row, positive and negative bidirectional hydraulic bending mechanism 3 and back-flexing mechanism 4.As shown in figure 8, positive bending machine
Structure 2 acts, and carrying out positive wide-angle to reinforcing bar bends.As shown in figure 9, positive and negative bidirectional hydraulic bending mechanism 3 acts, it is positive and negative double
It is moved forward to the Cylinder Plunger of oil cylinder 10, positive bending is carried out to reinforcing bar, while avoid barrier driving oil cylinder 12 and act, driven
Right avoidance baffle 13 declines, and left avoidance baffle 14 rises, and left avoidance baffle 14 coordinates central pin shaft 8 and curved pin 9, and reinforcing bar is formed
3 stress supports, make the bending precision higher of reinforcing bar, effect is more preferable, and bending process is more smooth.As shown in Figure 10, it is positive and negative two-way
Hydraulic bending mechanism 3 triggers travel switch after acting, move material device 5 and act, push reinforcing bar to suitable position.Such as Figure 11 institutes
Show, positive bending mechanism 2 acts again, and positive bending is carried out to reinforcing bar.As shown in figure 12, back-flexing mechanism 4 acts, to steel
Muscle carries out reversed wide-angle bending.As shown in figure 13, positive and negative bidirectional hydraulic bending mechanism 3 acts, positive and negative two-way cylinder 10
Cylinder Plunger moves backward, and reinforcing bar is reversely bent, while avoids barrier driving oil cylinder 12 and act, and drives right avoidance baffle
13 rise, and left avoidance baffle 14 declines, and right avoidance baffle 13 coordinates central pin shaft 8 and curved pin 9 to form 3 stress branch to reinforcing bar
Support；While positive and negative bidirectional hydraulic bending mechanism 3 acts, dislocation stack device 6 acts, and reinforcing bar is made smoothly to be overlapped after misplacing, is obtained
To stirrup.
Compare the prior art, three station reinforcing bar automatic moulding machines of the invention by apply positive and negative compound bending mechanism,
Under the premise of ensureing that functions of the equipments are constant, the setting of bending mechanism is reduced, simplify structure and reduces equipment volume, and improve bending
Accuracy and precision.
The preferred embodiments of the present invention are these are only, as long as realizing the technical side of the object of the invention with essentially identical means
Case is belonged within protection scope of the present invention.
Claims (10)
1. three station reinforcing bar automatic moulding machines, including rack, there are three the bending machines for being used for moment reinforcement for installing in the rack
Structure and the hydraulic bending control system for driving three bending mechanism actions, it is characterised in that：The bending mechanism includes
Positive bending mechanism, positive and negative compound bending mechanism and the back-flexing mechanism being arranged in order,
Be respectively arranged on the bending mechanism central pin shaft, the curved pin rotated around central pin shaft, the curved pin action of driving hydraulic pressure
Oil cylinder,
The hydraulic cylinder of wherein described positive and negative compound bending mechanism is positive and negative two-way cylinder, and the positive and negative two-way cylinder passes through transmission
Device drives the curved pin to be rotated in the forward direction or reversely rotated by initial position.
2. three stations reinforcing bar automatic moulding machine according to claim 1, which is characterized in that the hydraulic bending control system
Including multiple control valves and hydraulic pressure signal remote controler,
Multiple control valves cascade successively, wherein the control valve positioned at the first order connects oil pump, each control valve connects respectively
A hydraulic cylinder is connect, the control valve controls corresponding hydraulic cylinder action or resets,
The hydraulic pressure signal remote controler is arranged on the Cylinder Plunger stroke of hydraulic cylinder, the connection control of hydraulic pressure signal remote controler
Valve changes the state of control valve according to the action of hydraulic cylinder.
3. three stations reinforcing bar automatic moulding machine according to claim 2, which is characterized in that the control valve and hydraulic cylinder
Between be provided with the flexible piggybacking valve that control centre's axis pin stretches.
4. the three station reinforcing bar automatic moulding machines according to Claims 2 or 3, which is characterized in that the control valve includes opening
Valve and reversal valve are closed, the switch valve connects reversal valve by the oil duct that commutates,
Hydraulic oil inlet and hydraulic oil outlet are provided on the switch valve, the hydraulic oil inlet connection oil pump or upper level are opened
Close the hydraulic oil outlet of valve, the hydraulic oil inlet or fuel tank of the hydraulic oil outlet connection next stage switch valve of the switch valve, institute
Stating the spool action of switch valve makes the hydraulic oil inlet of switch valve switch connection between commutation oil duct and hydraulic oil outlet,
Unloading port and two oil cylinder interfaces for connecting two end interface of hydraulic cylinder are provided on the reversal valve, it is described to change
Spool action to valve makes oil cylinder interface switch connection, and the state phase of two oil cylinder interfaces between commutation oil duct and unloading port
Instead.
5. three stations reinforcing bar automatic moulding machine according to claim 4, which is characterized in that if being provided on the switch valve
Dry state transformation interface, the hydraulic pressure signal remote controler connection status become alias.
6. three stations reinforcing bar automatic moulding machine according to claim 4, which is characterized in that the oil of the positive and negative two-way cylinder
Intracavitary is provided with Cylinder Plunger, and the oil sealing of the Cylinder Plunger is located at the middle part of oil pocket, and the rear end of the oil pocket is provided with forward direction
Oil circuit interface, the front end of oil pocket are provided with reversed oil circuit interface, and the forward direction oil circuit interface and reversed oil circuit interface are located at respectively
The oil sealing both sides of Cylinder Plunger；The hydraulic oil entered from positive oil circuit interface pushes Cylinder Plunger to move forward, and is driving curved pin just
To rotation, the hydraulic oil entered from reversed oil circuit interface pushes Cylinder Plunger to move backward, curved pin is driven to reversely rotate.
7. three stations reinforcing bar automatic moulding machine according to claim 2, which is characterized in that be provided in the rack automatic
Push the shifting material device of reinforcing bar.
8. three stations reinforcing bar automatic moulding machine according to claim 7, which is characterized in that the material device that moves is included along curved
The sliding rail of bent mechanism orientation arrangement slides the shifting trolley being provided with for pushing reinforcing bar, the rack on the sliding rail
On be provided with the motor that driving moves trolley action, the motor is driven by belt wheel transmission mechanism moves trolley along before and after sliding rail
It is mobile.
9. three stations reinforcing bar automatic moulding machine according to claim 8, which is characterized in that the hydraulic oil of the bending mechanism
The travel switch of driving motor action is provided on cylinder Cylinder Plunger stroke.
10. three station reinforcing bar automatic moulding machines according to claim 8 or claim 9, which is characterized in that be provided on the sliding rail
Control moves the scale reversing switch of trolley stroke, and the scale reversing switch connects driving motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810148419.XA CN108213266B (en) | 2018-02-13 | 2018-02-13 | Three-station automatic reinforcing steel bar forming machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810148419.XA CN108213266B (en) | 2018-02-13 | 2018-02-13 | Three-station automatic reinforcing steel bar forming machine |
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| Publication Number | Publication Date |
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| CN108213266A true CN108213266A (en) | 2018-06-29 |
| CN108213266B CN108213266B (en) | 2023-10-10 |
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ID=62661903
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810148419.XA Active CN108213266B (en) | 2018-02-13 | 2018-02-13 | Three-station automatic reinforcing steel bar forming machine |
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|---|---|---|---|---|
| CN109732012A (en) * | 2019-01-25 | 2019-05-10 | 冯广建 | Linkage shifting two-way hoop bender of reinforced bar |
| CN109732011A (en) * | 2019-01-25 | 2019-05-10 | 冯广建 | The linkage shifting backing pin plate of stirrup bender |
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| CN109732011A (en) * | 2019-01-25 | 2019-05-10 | 冯广建 | The linkage shifting backing pin plate of stirrup bender |
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| Publication number | Publication date |
|---|---|
| CN108213266B (en) | 2023-10-10 |
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