CN100503070C - Bending device for bending machine - Google Patents
Bending device for bending machine Download PDFInfo
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- CN100503070C CN100503070C CNB2006100062338A CN200610006233A CN100503070C CN 100503070 C CN100503070 C CN 100503070C CN B2006100062338 A CNB2006100062338 A CN B2006100062338A CN 200610006233 A CN200610006233 A CN 200610006233A CN 100503070 C CN100503070 C CN 100503070C
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- pressure mould
- supporting member
- bending
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Abstract
A bending device for bending machine comprises a matrix ( 2 ), a countermatrix ( 6 ), and a die ( 7 ) able to prevent wrinkles. A countermatrix-holder support element ( 8 ) is fixed on an upper slide ( 10 ), which is slidable transversally to a workpiece T to be bent on a lower slide ( 11 ) movable in turn in the same direction of the upper slide ( 10 ), on a table ( 12 ). A first double-acting cylinder ( 19 ), being fixed on said lower slide ( 11 ), moves the countermatrix ( 6 ) toward and away from the workpiece (T); and a second double-acting cylinder ( 24 ) is slidable on the upper slide ( 10 ) and connected to a slider ( 25 ) on a counteracting rod ( 26 ) which is pivoted about an end of an arm-turning spindle ( 3 ), so that a force is exerted on the countermatrix-holder support element ( 8 ) in a projecting portion ( 23 ) thereof.
Description
Technical field
The present invention relates to the bending apparatus of bending machine (bending machine).
Though the bending machine of radii fixus tubing is used as the example of bending machine in following explanation, obviously, the present invention is not limited to this bending machine, and the present invention also can be applicable to the bending machine of radius variable tubing.In addition, the present invention not only can be applied to process tubing, is called as the various section bar bars of workpiece below can also being applied to process.
Background technology
This bending apparatus comprises rotation bending die or mould (matrix), and the bench vice of facing described mould.Described bench vice is installed on the bending arm, and clamping is positioned at the part of the next-door neighbour back of workpiece sweep along the workpiece direction of feed.Bending apparatus also comprises extrusion die or back-pressure mould (countermatrix), and it is placed in the next-door neighbour front that is held part of workpiece, and described back-pressure mould does not rotate with the bending arm.When described mould was pulled, described back-pressure mould moved with described workpiece at described workpiece, to bear the radial reaction force of workpiece.Except the back-pressure mould, wrinkle resistant mould is installed on the nonrotational part of bending machine in the mode relative with described back-pressure mould, and can regulate its position with respect to mould structure.The nonrotational part of bending machine can be any known type, for example is shaped as vice bench or longitudinal member, has axle or does not have axle; The nonrotational part of described bending machine is irrelevant with the present invention, and following will the explanation.
More existing problems relate in known bending machine, and at first, the structure of back-pressure form unit must be very firm, and volume is big then, to bear the just processed reaction force that workpiece was applied.In fact, the structure deficiency of back-pressure form unit has produced manufacturing deficiency, for example the workpiece of the tubing of non-consistent radius and off-standard size.For this reason, this structure need cause the special design that the cost of bending machine increases.
In addition, in known bending machine, wrinkle resistant mould by the driving control device driving of himself accurately to be located with respect to workpiece.It is relative with the driving control device that is used for locating the back-pressure mould that this driving control device of wrinkle resistant mould is located to.This requires the operator to move around machine troublesomely, to locate this two wrinkle resistant moulds and back-pressure mould according to the workpiece that will be bent.
Summary of the invention
The present invention is intended to overcome above-mentioned defective.
An object of the present invention is to provide the structure and layout of back-pressure mould, thereby with normally used comparing in known bending machine, have littler intensity and littler volume, and more cheap then, yet they are still keeping same high efficiency aspect the reaction force that bears processed workpiece.
Another object of the present invention provides simple, the reliable operating means of back-pressure mould.
A further object of the present invention provides the operating means of wrinkle resistant mould, and it can be controlled from a side of machine.
According to the present invention, the bending apparatus of bending machine comprises bending die or mould, pressure die or back-pressure mould and wrinkle resistant mould.Described mould is installed on the pivoted arm axle, and wherein workpiece is bent around described mould.The back-pressure mould that is suitable for bearing the reaction force of workpiece in bending operation keeps supporting member to be held by the back-pressure mould, described back-pressure mould keeps supporting member to be fixed on the side slide, the described side slide of going up is installed into and can laterally sliding with respect to workpiece on the side slide down, described side slide down conversely on the platform along with described on the identical direction of side slide removable.Described wrinkle resistant mould is held by the die support element, thereby and to described back-pressure mould.
The back-pressure mould applies a suitable pressure by first operating means that comprises first and second pairs of moving cylinders on described workpiece.Described first pair of moving cylinder is fixed on down on the side slide and has first cylinder piston rod, its act on described back-pressure mould keep on the supporting member with towards with move described back-pressure mould away from workpiece.Second pair of moving cylinder can slide and be connected to the sliding part that is positioned on the back reaction rod on last side slide, a rotate end of arm axle of described back reaction rod pivots.Described sliding part is designed to abut against first stop block on the described back reaction rod, thereby second cylinder piston rod keeps the jut office of supporting member power to be applied to described back-pressure mould at the back-pressure mould to be kept on the supporting member, and wherein said back-pressure mould keeps the jut of supporting member to be positioned at the next door (side) of the part that first cylinder piston rod acted on.
Advantageously, second pair of moving cylinder further is slidably mounted on the leading screw (threaded rod) by means of vertical plate, wherein said leading screw is rigidly connected to supporting station, and described vertical plate is designed to abut against when sliding part on being positioned at back reaction rod abuts against first stop block second stop block that is positioned on the leading screw.Should be understood that the above-mentioned remodeling that has two stop blocks makes wins operating means than only having the firmer of a stop block.
In addition, before the bending arm of the periphery that is fixed in described pivoted arm axle is implemented bending operation by the part of clamping and the described workpiece of traction, act on second operating means on the described wrinkle resistant mould by the supporting member by means of described supporting member and described wrinkle resistant mould, described back-pressure mould and described wrinkle resistant mould apply suitable pressure on described workpiece.Second operating means comprises mode slider, and the die support element that is used for wrinkle resistant mould is installed in described mode slider, and described mode slider is by means of jockey cushion block and sliding on platform integratedly with following side slide for example.
Description of drawings
In conjunction with the accompanying drawings, with reference to preferred embodiment, the present invention will be described, wherein:
Fig. 1 is a perspective view, shows first embodiment according to bending apparatus of the present invention;
Fig. 2 is a vertical view, shows first embodiment of the bending apparatus among Fig. 1, simultaneously, the workpiece that is bent is placed on the described device but is not clamped between back-pressure mould and the wrinkle resistant mould;
Fig. 3 is a vertical view, shows first embodiment of the bending apparatus among Fig. 1, simultaneously, the workpiece that is bent is placed on the described device but is clamped between back-pressure mould and the wrinkle resistant mould;
Fig. 4 is a perspective view, shows second embodiment according to bending apparatus of the present invention, simultaneously, the workpiece that is bent is placed on the described device but is not clamped between back-pressure mould and the wrinkle resistant mould;
Fig. 5 dissects left view, shows second embodiment of the bending apparatus among Fig. 4.
The specific embodiment
Referring to accompanying drawing, among Fig. 1 show in the perspective view mode that according to first embodiment of bending apparatus of the present invention it is installed on the supporting station 1 of bending machine.The bending machine of direction extension is also not shown to the left in the drawings.Bending die or the mould 2 arm axle 3 that rotates is pivotably mounted on supporting station 1.Usually, in this machine, bending arm 4 is fixed on the periphery of pivoted arm axle 3, thereby swings along with pivoted arm axle 3.Bending arm 4 is provided with bench vice 5, and it is designed to clamping with the workpiece that is bent, tubing T just, and shown in Fig. 2 and 3, they are vertical views of described bending machine.
By on the tubing T direction of feed shown in the arrow F, tubing T will be bent next-door neighbour's aft section partly by bench vice 5 clampings at it in Fig. 2 and 3.In addition, according to arrow F, the part of tubing T before being positioned at mould 2 is subjected to a pressure between pressure die or back-pressure mould 6 and wrinkle resistant mould 7.Back-pressure mould 6 is remained on its supporting member 8 by the direction of feed along tubing T slidably by means of prismatic connector, and the tenon portion that wherein is used for described prismatic connector is illustrated by Reference numeral 9 at Fig. 1.The back-pressure mould keeps supporting member 8 can bear the reaction force of tubing T during bending operation.Back-pressure mould 6 can move in known manner along supporting member 8.
Especially referring to Fig. 2, according to the first embodiment of the present invention, the back-pressure mould keeps supporting member 8 to be fixed on the side slide 10.Last side slide 10 can laterally slide with respect to tubing T on the side slide 11 down, and described side slide 11 down conversely can be on platform 12 moves along the direction identical with last side slide 10.Platform 12 crosswise fixed are to supporting station 1, simultaneously from described supporting station 1 outstanding foreground partition 13 and the back partition 14 of forming.
Relative with back-pressure mould 6, wrinkle resistant mould 7 is positioned on the identical platform 12, described wrinkle resistant mould 7 is kept by its die support element 15, and described die support element 15 is slidably mounted within on the slide block 16 by prismatic connector 29, and described slide block 16 laterally slides on platform 12 along the direction identical with slide block 11.According to the first embodiment of the present invention, slide block 16 is connected to slide block 11 by means of jockey, and described jockey is cushion block 17 for example, and its width depends on the diameter of the tubing T that will be bent.
In foreground partition 13, be provided with slide block 11 and 16 drive unit of fast moving back and forth, slide block 11 and 16 is joined together by cushion block 17, described drive unit for example is the axle 18 that has screw rod and nut assembly (not shown), it is placed between slide block 11 and the platform 12, and is operated by the handwheel (not shown).
By means of above-mentioned structure, by operating on the two at axle 18 and prismatic connector 29, wrinkle resistant mould 7 can be positioned with respect to mould 2, and it is same, be installed in back-pressure mould 6 on its supporting member 8 in the mode relative with mould 7, according to the selection of cushion block 7, but convergence is to mould 2.Based on the kind of workpiece and processing, cushion block 17 has various size.
In addition, first pair of moving cylinder 19 with piston rod 22 keeps operation on the supporting member 8 at the back-pressure mould, and wherein said back-pressure mould keeps supporting member 8 to be fixed on the side slide 10.The knob 20 of the manual control of piston rod stroke by first pair of moving cylinder 19 is set, thereby before process operation and realize the fine setting of the position of back-pressure mould 6 afterwards.
First pair of moving cylinder 19 is fixed on down on the side slide 11 by means of support 21,21, can move along the direction identical with first cylinder piston rod 22 with respect to platform 12 thereby go up side slide 10.
Thereby slide block 10,11 and 16 assembly can move around fast by means of the axle 18 that has screw rod and nut assembly.First pair of moving cylinder 19 is to act directly on the part that the back-pressure mould keeps first operating means on the supporting member 8.First cylinder piston rod 22 acts on the part of supporting member 8, and moving back-pressure mould 6 towards the tubing T that will be bent, and vice versa, to move back-pressure mould 6 away from the tubing T that is bent.
Second pair of moving cylinder 24, as another part of described first operating means, operation on jut 23 supporting member 8, that suspend by platform 12.Second pair of moving cylinder 24 with piston rod 27 is slidably mounted on the slide block 10 by means of the sliding part 25 that can move on back reaction rod 26.A rotate end of arm axle 3 of back reaction rod 26 pivots.Second cylinder piston rod 27 (being shown in Fig. 2 and 3) is resisted against on the jut 23 of supporting member 8.On back reaction rod 26, be provided with adjustable first stop block 28.This adjustable first stop block 28 schematically shows and is a pair of nut, and they are screwed on the threaded portion of back reaction rod 26, and can lock in the mode of stud.
When second cylinder piston rod 27 extends outside cylinder 24, sliding part 25 is designed to abut against by this way adjustable first stop block 28 on back reaction rod 26, promptly second cylinder piston rod 27 keeps jut 23 places of supporting member 8 power to be applied to described back-pressure mould at the back-pressure mould keeping on the supporting member 8, and wherein said jut 23 is positioned at the next door (side) of the operated part of first cylinder piston rod 22.
At first operating means that adopts two two moving cylinder 19,24 forms by means of the pressure fluid of feeding, oil and when controlled for example by one or more hydraulic circuits (not shown details); pressure die or back-pressure mould and wrinkle resistant mould apply suitable pressure on the tubing that will be bent, it offsets the reaction force that is applied by described tubing T in the bending operation of described tubing T.
Second operating means that acts on the wrinkle resistant mould represents that by slide block 16 (Fig. 1) supporting member 15 of described wrinkle resistant mould 7 is installed on the described slide block 16.The slide block 16 that is connected with first slide block 11 by means of cushion block 17 is positioned by the axle 18 that has screw rod and nut assembly as mentioned above.
Referring to Fig. 2, the back-pressure mould 6 that is kept by its supporting member 8 is illustrated away from tubing T, thereby wrinkle resistant mould 7 has been positioned near the tubing T.The cushion block 17 of correct distance by slide block 11 is connected with 16, and the fine setting of the knob 20 by first pair of moving cylinder 19 and being determined.
Referring to Fig. 3, can see that last side slide 10 moves with respect to following side slide 11 by the operation of first pair of moving cylinder 19 and second pair of moving cylinder 24.The first pair of moving cylinder 19 that is fixed to down side slide 11 acts directly on the supporting member 8 by its first cylinder piston rod 26.Second pair of moving cylinder 24 can move on back reaction rod 26 by sliding part 25.When sliding part 25 was resisted against on first stop block of suitably regulating 28, second cylinder piston rod, 27 pushes protrusion parts 23 abutted against tubing T.
By this way, the back-pressure mould 6 that is slidably mounted on the supporting member 8 can apply suitable power and not have malformation on tubing, and when tubing was bent, this malformation on tubing was offset.
Referring now to Figure 4 and 5,, show second embodiment according to bending apparatus of the present invention.In Figure 4 and 5, be respectively the perspective view and the left view of the bending apparatus that dissects of part, identical Reference numeral be used to represent with first embodiment in same or analogous part.
Especially referring to Fig. 4, according to a second embodiment of the present invention, the back-pressure mould keeps supporting member 8 to be fixed on the slide block 10.Slide block 10 can laterally slide with respect to tubing T on platform 12.Platform 12 crosswise fixed are to supporting station 1, simultaneously from described supporting station 1 outstanding foreground partition 13 and the back partition 14 of forming.
Wrinkle resistant mould 7 is installed on the identical platform 12 in the mode relative with back-pressure mould 6, wherein said wrinkle resistant mould 7 is kept by its die support element 15, described die support element 15 is slidably mounted on the slide block 16, and described slide block 16 laterally slides on platform 12 along the direction identical with slide block 10.Different with first embodiment, slide block 16 can be independent of slide block 10 and in its position of platform 12 adjusted.
In foreground partition 13, be provided with drive unit, it is by flexible gearing 30 and a pair of belt wheel 31,32 and slide block 10 is moved around fast.Belt wheel 31 is connected on the axle of motor 3 by key, and belt wheel 32 is connected on the axle 18 that has screw rod and nut assembly (not shown) by key, and wherein said axle 18 is between slide block 10 and platform 12.
It should be understood that the axle 18 that has screw rod and nut assembly therein is only to act directly on the said structure that the back-pressure mould keeps the part of the operating means on the supporting member 8, should not be considered to be preferable over the structure of the first embodiment of the present invention.In this second embodiment, only for knowing reason, first pair of moving cylinder of first operating means is also not shown, and this is because it comprises the feature in following explanation.
The back-pressure mould keeps another part of the operating means of supporting member 8 to adopt the form of two moving cylinders 24, its jut 23 to supporting member 8 is operated, this jut is positioned at the described next door (side) that has axle 18 parts that acted on of screw rod and nut assembly, and is suspended on the slide block 10.The hydraulic feed loop of two moving cylinders 24 is also not shown.
Two moving cylinders 24 are slidably mounted on the back reaction rod 26 by means of sliding part 25.A rotate end of arm axle 3 of back reaction rod 26 pivots.The piston rod 27 of cylinder 24 (being shown in Fig. 5) is resisted against on the jut 23 of supporting member 8.On back reaction rod 26, be provided with adjustable first stop block 28.This adjustable first stop block 28 is schematically illustrated as a pair of nut, and they are screwed on the threaded portion of back reaction rod 26, and can lock in the mode of stud.
Sliding part 25 that combines and cylinder 24 are rigidly connected to plate 34 vertical layout and that extend downwards.
Described plate 34 has the through hole that is used for leading screw 35 in its bottom.Second stop block 36 screws togather with leading screw 35 one, and wherein said second stop block 36 preferably takes to have the form of the sleeve of hex head portion 37 and smooth 38.Described second stop block 36 can be regulated its position along leading screw 35 by means of the spanner of the hex head portion 37 that engages second stop block 36.Plate 34 can slide on the smooth 38 of second stop block 36, and is tightened when abutting against hex head portion 37 at nut 39, and the mutual alignment between the plate 34 and second stop block 36 is locked by nut 39.
As shown in Figure 5, leading screw 35 for example is connected to the block 40 of supporting station 1 by thread connecting mode.
Work in-process, the operating means that keeps supporting member 8 by use according to the back-pressure mould of second embodiment of bending apparatus, sliding part 25 is designed to abut against stop block 28 on back reaction rod 26, and vertical plate 34 is designed to abut against second stop block 36, and described second stop block 36 correspondingly is conditioned its position on leading screw 35.
By this way, thereby be moved when making that back-pressure mould 6 abuts against tubing T by operating unit 30 to 33 at the slide block 10 that keeps supporting member 8, two moving cylinders 24 also are operated by this way, and promptly its piston rod 27 keeps 23 places, protruding part of supporting member 8 power to be applied on the back-pressure mould maintenance supporting member 8 at the back-pressure mould.Pass through sliding part 25 at the top by reaction at two moving cylinders 24, and in the bottom by second stop block 36 on the leading screw 35 by means of vertical plate 34 during by reaction, whole bending apparatus structure is suitably born the power of two moving cylinders 24, wherein said sliding part 25 abuts against first stop block 28 on back reaction rod 26, described leading screw 35 is screwed on the block 40 with supporting station 1 one.
This reaction structure according to second embodiment allows bending apparatus processing of the present invention to have diameter group mutually and the two all bigger tubing of thickness of processing with the bending machine that does not have this reaction structure.It should be understood that this has reduced the cost of bending machine.
The present invention only is illustrated by the mode of example with two embodiment, but under the prerequisite that does not break away from claims scope, can change and retrofit.
Claims (9)
1. bending apparatus that is used for bending machine comprises:
Be installed in the mould (2) on the pivoted arm axle (3), workpiece (T) is bent around described mould (2);
Back-pressure mould (6), it is kept supporting member (8) to keep by the back-pressure mould, and is suitable for bearing in bending operation the reaction force of described workpiece (T);
Wrinkle resistant mould (7), its by die support element (15) thus keep in the face of described back-pressure mould (6), be fixed on the described pivoted arm axle (3) bending arm (4) by clamping and the traction described workpiece (T) a part implement bending operation before, by means of supporting member (8 by back-pressure mould (6) and wrinkle resistant mould (7), 15) act on first operating means on the described back-pressure mould (6) and act on second operating means on the described wrinkle resistant mould (7), described back-pressure mould (6) and described wrinkle resistant mould (7) apply suitable pressure on described workpiece (T);
It is characterized in that:
Described back-pressure mould keeps supporting member (8) to be fixed on the side slide (10), the described side slide (10) of going up is installed into and can goes up with respect to the laterally slip of described workpiece (T) edge at following side slide (11), and described side slide (11) down conversely can be at platform (12) upward along moving with the described identical direction of side slide (10) that goes up;
Described first operating means comprises:
First pair of moving cylinder (19), it is fixed on the described side slide (11) down, and have first cylinder piston rod (22), described first cylinder piston rod act on described back-pressure mould keep on the part of supporting member (8) with towards with move described back-pressure mould (6) away from described workpiece (T); And
Second pair of moving cylinder (24), its can be on described side slide (10) go up and slide, and connecting the sliding part (25) on the back reaction rod (26), described back reaction rod (26) pivots around an end of described pivoted arm axle (3), described sliding part (25) is designed to abut against first stop block (28) on the described back reaction rod (26), thereby second cylinder piston rod (27) keeps the jut (23) of supporting member (8) to locate to keep supporting member (8) to apply power to described back-pressure mould at described back-pressure mould, and described back-pressure mould keeps the jut (23) of supporting member (8) to be positioned at the next door of the part that described first cylinder piston rod (22) acted on; And
Described second operating means comprises slide block (16), and the described die support element (15) that is used for wrinkle resistant mould is installed on it, and described slide block (16) is gone up slip at described platform (12) by means of cushion block (17) integratedly with described side slide (11) down.
2. bending apparatus according to claim 1 is characterized in that, described cushion block (17) has various size based on the kind of workpiece and processing.
3. bending apparatus according to claim 1 is characterized in that, described first pair of moving cylinder (19) is provided with manual adjustments knob (20), and described first cylinder piston rod (22) is adjustment stroke by described manual adjustments knob (20).
4. bending apparatus according to claim 1 is characterized in that, described back-pressure mould keeps the jut (23) by described second cylinder piston rod (27) pushing on the supporting member (8) to suspend with respect to described platform (12).
5. bending apparatus according to claim 1 is characterized in that, described first stop block (28) can be regulated its position on described back reaction rod (26).
6. bending apparatus according to claim 5 is characterized in that, described adjustable first stop block (28) is formed with a pair of stud nut on the threaded portion that is positioned at described back reaction rod (26).
7. bending apparatus according to claim 1, it is characterized in that, described bending apparatus is installed on the supporting station (1) of bending machine, described second pair of moving cylinder (24) further is slidably mounted on the leading screw (35) by means of vertical plate (34), wherein said second pair of moving cylinder (24) by means of sliding part (25) on described back reaction rod (26) slidably, described back reaction rod (26) pivots around an end of described pivoted arm axle (3), and described leading screw (35) is rigidly connected to described supporting station (1); When the sliding part (25) on being positioned at described back reaction rod (26) abutted against described first stop block (28), described vertical plate (34) abutted against second stop block (36) that is positioned on the described leading screw (35).
8. bending apparatus according to claim 7 is characterized in that, described second stop block (36) can be in described leading screw (35) adjusted.
9. bending apparatus according to claim 8, it is characterized in that, described second stop block (36) is a form of sleeve of taking to have internal thread, and described sleeve has hex head portion (37) and smooth (38), the described vertical plate of outer side engagement (34) of described smooth (38); By being acted on by spanner on the described hex head portion (37), described second stop block (36) can be along described leading screw (35) adjusting position.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ITRM2005A000035 | 2005-01-25 | ||
| ITRM20050035 ITRM20050035A1 (en) | 2005-01-25 | 2005-01-25 | BENDING HEAD FOR BENDING MACHINE. |
| ITRM2005A000146 | 2005-03-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1810404A CN1810404A (en) | 2006-08-02 |
| CN100503070C true CN100503070C (en) | 2009-06-24 |
Family
ID=36843600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100062338A Expired - Fee Related CN100503070C (en) | 2005-01-25 | 2006-01-23 | Bending device for bending machine |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN100503070C (en) |
| IT (1) | ITRM20050035A1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101837398A (en) * | 2010-05-24 | 2010-09-22 | 张家港市明华机械制造有限公司 | Wrinkle-resisting unit on pipe bender head |
| CN102814370A (en) * | 2011-06-10 | 2012-12-12 | 江阴市宏业机械制造有限公司 | Heading pipe bending machine |
| ITRM20130259A1 (en) * | 2013-05-02 | 2014-11-03 | Cml Int Spa | BENDING MACHINE OF THE MATRIX AND COUNTERMATCHING TYPE TO TURN RIGHT AND LEFT A PIECE STRETCHED |
| PL3027334T3 (en) | 2013-08-01 | 2018-07-31 | Addisonmckee, Inc. | Tie bar tensioning system |
| CN104907371A (en) * | 2015-05-07 | 2015-09-16 | 浙江利帆家具有限公司 | Improved structure of round tube bending device |
| CN105817509B (en) * | 2016-06-03 | 2017-11-17 | 山东大学 | A kind of pole class part hydraulic-driven bends extrusion molding apparatus |
| CN107716650A (en) * | 2017-11-29 | 2018-02-23 | 济南大正东智车用管路有限公司 | A kind of bending machine for steel tube |
| CN108213134A (en) * | 2018-01-02 | 2018-06-29 | 常熟骏驰科技有限公司 | A kind of compensation device for the curved position material extension of automobile shape tube |
-
2005
- 2005-01-25 IT ITRM20050035 patent/ITRM20050035A1/en unknown
-
2006
- 2006-01-23 CN CNB2006100062338A patent/CN100503070C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1810404A (en) | 2006-08-02 |
| ITRM20050035A1 (en) | 2006-07-26 |
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Granted publication date: 20090624 Termination date: 20100223 |