CN106238514A - Straightener - Google Patents
Straightener Download PDFInfo
- Publication number
- CN106238514A CN106238514A CN201610650246.2A CN201610650246A CN106238514A CN 106238514 A CN106238514 A CN 106238514A CN 201610650246 A CN201610650246 A CN 201610650246A CN 106238514 A CN106238514 A CN 106238514A
- Authority
- CN
- China
- Prior art keywords
- box
- roll
- upper roller
- straightener
- positioning convex
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
- B21D3/02—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts by rollers
-
- 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
- B21F1/02—Straightening
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Straightening Metal Sheet-Like Bodies (AREA)
- Rolls And Other Rotary Bodies (AREA)
Abstract
The open a kind of straightener of the present invention.Disclosed straightener includes upper roller system, lower roll system, upper roller box and roll box；Upper roller system is arranged at roller box, and lower roll system is arranged at roll box；Being in the position of same one end in upper roller box and roll box, one is provided with cushion block, and the end face of cushion block is provided with positioning convex；Another one is provided with locating recesses；Under straightener is in running order, positioning convex and locating recesses form aligning passage at the setpoint distance the most apart of the smoothing roll of straightener with roller box on dodging, upper roller system and lower roll system；Under straightener is in service mode, positioning convex with upper roller box or the movement of roll box mobile to locating recesses in the position of the axial location fit of smoothing roll, and cushion block is supported between roller box and roll box so that being formed between upper roller system and lower roll system and dodging passage；The upper end of roller box or the end of roll box are provided with pulling part.Such scheme can solve traditional problem that roller replacing mode existence is wasted time and energy, human cost is higher.
Description
Technical field
The present invention relates to straightening technology field, particularly relate to a kind of straightener.
Background technology
Straightener is a kind of the more commonly used plant equipment, for metal structures such as shape, bar, tubing, wire rods
Part is aligned.Refer to Fig. 1 and 2, straightener includes that upper roller system 11 and lower roll system 12, upper roller system 11 and lower roll system 12 all include
Many smoothing rolls, and between upper roller system 11 and lower roll system 12, form aligning passage 15.Wherein, upper roller system 11 is installed on roller box
13；Lower roll system 12 is installed on roll box 14.During aligning, hardware (generally aligns passage through aligning passage 15
Width be 30mm-40mm) be straightened.
In actual work process, once there is the most serious damage in the smoothing roll of upper roller system 11 and lower roll system 12,
Impaired smoothing roll is replaced by the workman that then needs repairing as early as possible.That is damaged in upper roller system 11 and lower roll system 12 rectifys
When straight roller is replaced, operator needs to pull out upper roller system 11 and lower roll system 12 to the side of straightener preseting length.I
Know, no matter upper roller box 13 and roll box 14 in the radial direction of smoothing roll or axially all have degree of freedom, therefore by pulling on
Roller box 13 can realize the movement of upper roller system 11, by pulling roll box 14 can realize the movement of lower roll system 12.
Pulled out by synchronization in order to ensure upper roller system 11 and lower roll system 12, typically require four pieces of blade fins 16 and two at present
Support beam 17.Concrete operating process is as follows: service worker is all connected with leading in the corner that upper roller box 13 and roll box 14 are corresponding
To slide plate 16, one end of blade fin 16 is fixedly linked with upper roller box 13；The other end and roll box 14 are at the width aligning passage 15
Degree direction is slidably matched.Blade fin 16 can guarantee that roller box 13 and the roll box 14 axial location fit at smoothing roll.When leading
Installing to slide plate 16 after putting in place, upper roller box 13 is sling to regulate the width aligning passage 15 by operator with boom hoisting,
Then two support beams 17 are respectively placed in aligning passage 15 both sides, and support beam 17 is fixed on roll box 14.Support beam 17
Not only play the effect as follow-up pulling part, the width of aligning passage 15 can also be regulated to avoid roller replacing operation to other simultaneously
The damage of smoothing roll.Before roll change, service worker drives roll box 14 to move, due to roll box 14 by pulling support beam 17
With upper roller box 13 by blade fin 16 at the axial location fit of smoothing roll, therefore go up roller box 13 meeting along with the shifting of roll box 14
Moving and move, and then realize the overall removal of upper roller system 11 and lower roll system 12, then service worker can carry out corresponding roll change
Operation.
By above-mentioned work process it can be seen that current roller replacing operation needs to install blade fin 16 and support beam 17,
After maintenance is complete, needs to be directed to slide plate 16 and support beam 17 is removed once again.Visible, traditional roller replacing mode exists time-consuming
Laborious problem.And, traditional roller replacing mode need experienced employee to carry out during support beam 17 installing in order to avoid
The surface of smoothing roll in damage upper roller system 11 and lower roll system 12.Visible, there is higher the asking of human cost in traditional roller replacing mode
Topic.
Visible, how to solve wasting time and energy existing for traditional roller replacing mode, problem that human cost is higher, be current
The technical problem that those skilled in the art are urgently to be resolved hurrily.
Summary of the invention
The open a kind of straightener of the present invention, to solve wasting time and energy existing for traditional roller replacing mode, manpower becomes
This higher problem.
In order to solve above-mentioned technical problem, the present invention is disclosed directly below technical scheme:
Straightener, including upper roller system, lower roll system, upper roller box and roll box；Wherein: described upper roller system is arranged at described upper roller
Box, described lower roll system is arranged at described roll box；
Being in the position of same one end in described upper roller box and described roll box, one is provided with cushion block, described cushion block
End face is provided with positioning convex；Another one is provided with locating recesses；
Under described straightener is in running order, described positioning convex and described locating recesses rectifying at described straightener
The setpoint distance the most apart of straight roller is to dodge described upper roller box, and described upper roller system and described lower roll system form aligning passage；Institute
State setpoint distance more than zero；
Under described straightener is in service mode, described positioning convex is with described upper roller box or the movement of described roll box
And mobile to described locating recesses in the position of the axial location fit of described smoothing roll, and described cushion block is supported on described
Between roller box and described roll box so that between described upper roller system and described lower roll system formed dodge passage, described in dodge passage
Width more than the width of described aligning passage；
The described end of upper roller box or the end of described roll box are provided with pulling part.
Preferably, in above-mentioned straightener, described positioning convex is locating dowel, and described locating recesses is hole, location；Described fixed
Position post is polygon with the cross section in hole, described location.
Preferably, in above-mentioned straightener, described positioning convex and the equal at least two of described locating recesses；Wherein, described
The detent mechanism that positioning convex and described locating recesses location fit are formed is two, and is distributed in correspondingly on described
Roller box and the two ends of described roll box.
Preferably, in above-mentioned straightener, the root of described pulling part is hinged with described upper roller box or described roll box.
Preferably, in above-mentioned straightener, the bottom of described roll box is provided with rolling mechanism；Described rolling mechanism is used for will
Described roll box is supported in installation foundation.
Preferably, above-mentioned straightener also includes that driving means, described driving means are connected with described pulling part, to drive
State roll box to roll along described installation foundation.
Preferably, above-mentioned straightener also includes displacement detector and controller；Wherein:
Described displacement detector is connected with described controller, and described controller is connected with described driving means；Described displacement
Detector is for detecting the displacement of described roll box；Described controller for described displacement equal to described setting away from
From time control described driving means and quit work.
Preferably, in above-mentioned straightener, the surface configuration that described upper roller box contacts with described roll box cooperates
Slide rail.
Preferably, in above-mentioned straightener, described cushion block sets for the surface contacted with described upper roller box or described roll box
It is equipped with elastic wear-resisting layer.
Straightener disclosed by the invention has the advantages that
When straightener disclosed by the invention is in service mode, positioning convex and locating recesses can realize roller box and lower roll
Box is at the axial location fit of smoothing roll, and cushion block can be supported between roller box and roll box to be formed and dodge passage simultaneously.Phase
Ratio for background technology, straightener disclosed by the invention adjust its be in service mode time, it is only necessary to by positioning convex with
Locating recesses docks, relatively low to the skill requirement of operator, can reduce people when therefore this straightener is in service mode
Power cost, simultaneously without dismounting auxiliary member, operates relatively simple.Visible, aligning function disclosed by the invention solves traditional changing
Wasting time and energy existing for roller mode, the problem that human cost is higher, be current those skilled in the art skills urgently to be resolved hurrily
Art problem.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme in the embodiment of the present invention or background technology, below will be to embodiment or the back of the body
In the description of scape technology, the required accompanying drawing used is briefly described, it should be apparent that, for those of ordinary skill in the art
Speech, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the schematic diagram of traditional roller replacing mode；
Fig. 2 is the left view of Fig. 1；
Fig. 3 is the plan structure schematic diagram of the upper roller box of straightener disclosed in the embodiment of the present invention；
Fig. 4 is the plan structure schematic diagram of the roll box of straightener disclosed in the embodiment of the present invention；
Fig. 5 is the part-structure schematic diagram of straightener disclosed in the embodiment of the present invention.
Description of reference numerals:
11-upper roller system, 12-lower roll system, 13-upper roller box, 14-roll box, 15-aligning passage, 16-blade fin, 17-prop up
Support beam, 21-upper roller system, 22-lower roll system, 23-upper roller box, 231-locating recesses, 24-roll box, 241-positioning convex, 242-pad
Block, 243-pull part, 25-dodges passage.
Detailed description of the invention
For the technical scheme making those skilled in the art be more fully understood that in the present invention, real below in conjunction with the present invention
Execute the accompanying drawing in example, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described enforcement
Example is only a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, this area is general
The every other embodiment that logical technical staff is obtained on the premise of not making creative work, all should belong to the present invention
The scope of protection.
Refer to Fig. 3-5, the open a kind of straightener of the embodiment of the present invention.Disclosed straightener include upper roller system 21, under
Roller system 22, upper roller box 23 and roll box 24.With background technology described in identical, upper roller system 21 is arranged at roller box 23, logical
Often include many smoothing rolls；Lower roll system 22 is arranged at roll box 24, generally also includes many smoothing rolls, the mobile energy of upper roller box 23
Driving upper roller system 21 to move, in like manner, the mobile of roll box 24 can drive lower roll system 22 to move；Generally, roll box 24 is arranged at peace
Dress basis, such as ground.It should be noted that in the application, the upper and lower noun of locality such as grade is only seen with visual angle residing for Figure of description
Examine and for name, it should not be construed the restriction of technical scheme.
Upper roller box 23 is in the position of same one end in roll box 24, and one is provided with cushion block 242, and another one is provided with
Locating recesses 231, cushion block 242 is provided with positioning convex 241, and positioning convex 241 can be with locating recesses 231 location fit.Tool
Body, under disclosed in the present embodiment, straightener is in running order, positioning convex 241 and locating recesses 231 are at the axle of smoothing roll
To apart, setpoint distance is to dodge upper roller box 23, and time in running order, the position between upper roller box 23 and roll box 24 makes
Forming aligning passage between upper roller system 21 and lower roll system 22, aligning passage is used for carrying out the straightening operation of hardware.Need
Bright, setpoint distance is more than zero.
Under straightener is in service mode, positioning convex 241 is mobile with upper roller box 23 or the movement of roll box 24,
Eventually mobile to locating recesses 231 under the position of the axial location fit of smoothing roll, this kind of state, cushion block 242 is supported in
Between roller box 23 and roll box 24, and then make to be formed between upper roller system 21 and lower roll system 22 to dodge passage 25, dodge passage 25
Width more than aligning passage width.
It should be noted that in the present embodiment, can sling upper roller box 23 with boom hoisting, and be maintained at the axle of smoothing roll
To without mobile, then the roll box 24 that moves axially at smoothing roll is in locating recesses 231 and coordinates realizing positioning convex 241
State；Roll box 24 can also be kept to be in fixed state, sling upper roller box 23 by boom hoisting, then at aligning
The roller box 23 that moves axially of roller is in mated condition to realize positioning convex 241 with locating recesses 231.The end of upper roller box 23
Or the end of roll box 24 is provided with pulling part 243, operator can be thus real with roller box 23 on manual pull or roll box 24
Now going up the change of position between roller box 23 and roll box 24, certainly, the above-mentioned positioning convex 241 that realizes is in locating recesses 231
In the operating process of mated condition, owing to cushion block 242 eventually makes to be formed between upper roller system 21 and lower roll system 22 broader keeping away
Allow passage 25, therefore, no matter move roller box 23 or roll box 24, be required for boom hoisting and upper roller box 23 is sling.
When disclosed in the embodiment of the present invention, straightener is in service mode, positioning convex 241 and locating recesses 231 can realize
Upper roller box 23 and roll box 24 are at the axial location fit of smoothing roll, and cushion block 242 can be supported in roller box 23 and roll box simultaneously
Formed between 24 and dodge passage 25.For background technology, straightener disclosed in the embodiment of the present invention is adjusting at it
When service mode, it is only necessary to positioning convex 241 is docked with locating recesses 231, to the skill requirement of operator relatively
Low, human cost can be reduced when therefore this straightener is in service mode, simultaneously without dismounting auxiliary member, operate relatively simple.
Visible, the embodiment of the present invention disclosed aligning function solves wasting time and energy existing for traditional roller replacing mode, human cost relatively
High problem, is current those skilled in the art technical problems urgently to be resolved hurrily.
Concrete, positioning convex 241 can be locating dowel, and locating recesses 231 can be hole, location, in order to realize preferably
Locating effect, locating dowel is polygon with the cross section in hole, location, such as hexagon.
In the present embodiment, positioning convex 241 and the equal at least two of locating recesses 231, positioning convex 241 and locating recesses
In the detent mechanism that 231 location fit are formed, two detent mechanisms can be distributed in roller box and roll box correspondingly
Two ends.The detent mechanism that positioning convex 241 and locating recesses 231 are formed at least two be distributed in roller box 23 and lower roll
The diagonal angle that box 24 is corresponding, can improve upper roller box 23 and roll box 24 effect at the axial location fit of smoothing roll.Refer to
Fig. 3 and 4, positioning convex 241 and locating recesses 231 are four, are respectively arranged at roller box 23 and the corner of roll box 24.
Pulling part 243 can be the parts that hook etc. is easy to pull operation or connect.The root pulling part 243 can be with upper
Roller box 23 or roll box 24 are hinged, and in such cases, pulling part 243 can rotate to be packed up, and so can reduce pulling part and rectify
The most occupied space of straight roller.
Normal conditions, owing to roll box 23 is positioned at installation foundation, pull roll box 24 more convenient, and therefore service worker is led to
Sling frequently with by upper roller box 23, pull the mode of roll box 24 and realize the location of positioning convex 241 and locating recesses 231 and join
Close.Based on this, it is preferred that the bottom of roll box 24 is provided with rolling mechanism, rolling mechanism is for being supported in peace by roll box 24
Dress basis.
As described above, can manually be pulled pulling part 243 by service worker and then realize the movement of roll box, also
Can be realized by driving means.Concrete, straightener disclosed in the present embodiment can also include driving means.Driving means
It is connected with pulling part 243, is used for driving roll box 24 to roll along installation foundation.
In the present embodiment, positioning convex 241 may be located at the same straight line parallel with smoothing roll with locating recesses 231
On, in such cases, directly drive upper roller box 23 or roll box 24 along with the moving axially of smoothing roll.In order to ensure shifting
Dynamic stability, the surface configuration that upper roller box 23 contacts with roll box 24 has the slide rail of cooperation, to avoid both
Relative movement glances off.
In order to ensure accurately putting to improve operating efficiency in place, disclosed in the present embodiment, straightener can also include displacement detecting
Device and controller.Wherein, displacement detector is connected with controller, and controller is connected with driving means, and displacement detector is used for examining
Surveying the displacement of roll box 24, controller quits work for controlling driving means when displacement is equal to setpoint distance,
Now positioning convex 241 and locating recesses 231 are in location fit state.Visible, this preferred version can also realize maintenance operation
Automatization.
In order to avoid to upper roller box 23 or the abrasion of roll box 24 and the abrasion of itself, it is preferred that cushion block 242 for
Roller box 23 or the flexible wearing layer of surface configuration of roll box 24 contact.
Herein, what each preferred version only emphasis described is different from other scheme, if each preferred version
Do not conflict, can combination in any, the embodiment formed after combination is also within category disclosed in this specification, it is contemplated that
Text is succinct, and the embodiment with regard to no longer being formed combination individually describes herein.
The above is only the detailed description of the invention of the present invention, makes to skilled artisans appreciate that or realize this
Bright.Multiple amendment to these embodiments will be apparent to one skilled in the art, as defined herein
General Principle can realize without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein and features of novelty phase one
The widest scope caused.
The above is only the detailed description of the invention of the present invention, it is noted that for the ordinary skill people of the art
For Yuan, under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (9)
1. straightener, including upper roller system (21), lower roll system (22), upper roller box (23) and roll box (24)；Wherein: described upper roller system
(21) being arranged at described upper roller box (23), described lower roll system (22) is arranged at described roll box (24)；It is characterized in that:
Being in the position of same one end in described upper roller box (23) and described roll box (24), one is provided with cushion block (242), institute
The end face stating cushion block (242) is provided with positioning convex (241)；Another one is provided with locating recesses (231)；
Under described straightener is in running order, described positioning convex (241) and described locating recesses (231) are at described aligning
The smoothing roll of machine axially at a distance of setpoint distance to dodge described upper roller box (23), described upper roller system (21) and described lower roll system
(22) aligning passage is formed；Described setpoint distance is more than zero；
Under described straightener is in service mode, described positioning convex (241) is with described upper roller box (23) or described roll box
(24) movement and mobile in the position of the axial location fit of described smoothing roll and described with described locating recesses (231)
Cushion block (242) be supported between described upper roller box (23) and described roll box (24) so that described upper roller system (21) with described under
Formed between roller system (22) and dodge passage (25), described in dodge the width of passage (25) width more than described aligning passage；
The described end of upper roller box (23) or the end of described roll box (24) are provided with pulling part (243).
Straightener the most according to claim 1, it is characterised in that described positioning convex (241) is locating dowel, described location
Depression (231) is hole, location；Described locating dowel is polygon with the cross section in hole, described location.
Straightener the most according to claim 2, it is characterised in that described positioning convex (241) and described locating recesses
(231) equal at least two；Wherein, described positioning convex (241) and determining that described locating recesses (231) location fit is formed
Position mechanism is two, and is distributed in the two ends of described upper roller box (23) and described roll box (24) correspondingly.
Straightener the most according to claim 1, it is characterised in that the root of described pulling part (243) and described upper roller box
Or described roll box (24) is hinged (23).
Straightener the most according to claim 1, it is characterised in that the bottom of described roll box (24) is provided with roller press
Structure；Described rolling mechanism is for being supported in installation foundation by described roll box (24).
Straightener the most according to claim 5, it is characterised in that also including driving means, described driving means is with described
Pull part (243) to be connected, to drive described roll box (24) to roll along described installation foundation.
Straightener the most according to claim 6, it is characterised in that also include displacement detector and controller；Wherein:
Described displacement detector is connected with described controller, and described controller is connected with described driving means；Described displacement detecting
Device is used for detecting the displacement of described roll box (24)；Described controller for described displacement equal to described setting away from
From time control described driving means and quit work.
Straightener the most according to claim 1, it is characterised in that described upper roller box (23) connects with described roll box (24)
The surface configuration touched has the slide rail cooperated.
9. according to the straightener described in any one in claim 1-8, it is characterised in that described cushion block (242) is used for and institute
State roller box (23) or the flexible wearing layer of surface configuration that described roll box (24) contacts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610650246.2A CN106238514B (en) | 2016-08-09 | 2016-08-09 | Straightener |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610650246.2A CN106238514B (en) | 2016-08-09 | 2016-08-09 | Straightener |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106238514A true CN106238514A (en) | 2016-12-21 |
| CN106238514B CN106238514B (en) | 2017-12-05 |
Family
ID=58078712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610650246.2A Active CN106238514B (en) | 2016-08-09 | 2016-08-09 | Straightener |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106238514B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI734437B (en) * | 2019-04-17 | 2021-07-21 | 大陸商建科機械（天津）股份有限公司 | Numerical control steel bar straightening and cutting machine and its control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0839131A (en) * | 1994-07-28 | 1996-02-13 | Daido Steel Co Ltd | Precision drawing method of metallic wire and device for executing the same |
| JP2007061822A (en) * | 2005-08-17 | 2007-03-15 | Kawazoe Kikai Seisakusho:Kk | Bar material drawing system |
| CN102248029A (en) * | 2011-05-31 | 2011-11-23 | 太原重工股份有限公司 | Pre-straightener for medium and thick plates |
| CN202290889U (en) * | 2011-11-02 | 2012-07-04 | 中冶赛迪工程技术股份有限公司 | Straightening roller balancing device |
| CN102581080A (en) * | 2012-02-08 | 2012-07-18 | 中冶赛迪工程技术股份有限公司 | Short-stress-path multi-roller straightener |
| CN102873137A (en) * | 2012-10-08 | 2013-01-16 | 无锡市欣华泓机械制造有限公司 | Straightener structure convenient in roll replacement |
-
2016
- 2016-08-09 CN CN201610650246.2A patent/CN106238514B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0839131A (en) * | 1994-07-28 | 1996-02-13 | Daido Steel Co Ltd | Precision drawing method of metallic wire and device for executing the same |
| JP2007061822A (en) * | 2005-08-17 | 2007-03-15 | Kawazoe Kikai Seisakusho:Kk | Bar material drawing system |
| CN102248029A (en) * | 2011-05-31 | 2011-11-23 | 太原重工股份有限公司 | Pre-straightener for medium and thick plates |
| CN202290889U (en) * | 2011-11-02 | 2012-07-04 | 中冶赛迪工程技术股份有限公司 | Straightening roller balancing device |
| CN102581080A (en) * | 2012-02-08 | 2012-07-18 | 中冶赛迪工程技术股份有限公司 | Short-stress-path multi-roller straightener |
| CN102873137A (en) * | 2012-10-08 | 2013-01-16 | 无锡市欣华泓机械制造有限公司 | Straightener structure convenient in roll replacement |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI734437B (en) * | 2019-04-17 | 2021-07-21 | 大陸商建科機械（天津）股份有限公司 | Numerical control steel bar straightening and cutting machine and its control method |
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| Publication number | Publication date |
|---|---|
| CN106238514B (en) | 2017-12-05 |
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