CN106925647A - One kind intersects combined type U-tube solar heat exchanger bending machine - Google Patents
One kind intersects combined type U-tube solar heat exchanger bending machine Download PDFInfo
- Publication number
- CN106925647A CN106925647A CN201710274605.3A CN201710274605A CN106925647A CN 106925647 A CN106925647 A CN 106925647A CN 201710274605 A CN201710274605 A CN 201710274605A CN 106925647 A CN106925647 A CN 106925647A
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- wheel
- combined type
- heat exchanger
- bending machine
- tube
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- 238000005452 bending Methods 0.000 title claims abstract description 36
- 239000002184 metal Substances 0.000 claims abstract description 21
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims 1
- 238000000926 separation method Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 13
- 239000011521 glass Substances 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000007493 shaping process Methods 0.000 abstract description 3
- 238000011031 large-scale manufacturing process Methods 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003534 oscillatory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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
- B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
- B21D11/06—Bending into helical or spiral form; Forming a succession of return bends, e.g. serpentine form
-
- 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
- B21D53/00—Making other particular articles
- B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
- B21D53/06—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of metal tubes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention belongs to mechanical equipment technical field, combined type U-tube solar heat exchanger bending machine is intersected more particularly, to one kind.Including support, longitudinally rotated on described support and be connected with gyroaxis, described gyroaxis is connected with revolution thick stick, described revolution thick stick is respectively arranged at two ends with gyro black assembly, and described gyroaxis is connected with the motor that gyroaxis can be driven to circumferentially rotate.Advantage is：The processing technologys such as the curving of the different radius of gyration and different gyratory directions, the demoulding are carried out to metal tube using the bending machine; can machine-shaping list branch or branched U-tube constitute the intersection combined type U-tube heat absorbing units for being placed on all-glass solar vacuum tubular collector inner tube; compared than traditional bending process method; producing efficiency is high; it is easy to large-scale production; low manufacture cost, product quality is guaranteed.
Description
Technical field
The invention belongs to mechanical equipment technical field, combined type U-tube solar heat exchanger is intersected more particularly, to one kind
Bending machine.
Background technology
It is well known that placing continuous branched metal U-tube composition one in an all glass vacuum heat collection tube of solar energy
Individual intersection combined type U-tube heat absorbing units, medium can realize iterative cycles under same flow velocity during along U-shaped Bottomhole pressure
Heat exchange, increases the holdup time in vacuum tube, and absorption maximum heat；Medium temperature gradually rises；So that solar energy heating
Device can export temperature higher.Because solar thermal collector is made up of branched vacuum tube in Fig. 1, corresponding must also have many
The individual metal tube intersected between combined type U-tube heat absorbing units, and multiple heat absorbing units is not allow for connector.Traditional is U-shaped
Pipe pipe bender implement it is continuous 180 ° revolution when, it is impossible to complete intersect combined type U-tube heat absorbing units bend and cannot
Complete the techniques such as multiple continuous rotary, demouldings for intersecting combined type U-tube heat absorbing units.180 ° of angles are welded frequently with straight length
The method of deflecting bend pipe, such as common coil pipe of air-conditioner blower.Disadvantage of this is that complex process, efficiency are low, high cost, no
It is suitable for the installation of solar energy large area.
The content of the invention
Regarding the issue above, the present invention provides it is a kind of reasonable in design, intersect combined type U-tube heat absorbing units
The solar heat exchanger bending machine for bending.
To reach above-mentioned purpose, present invention employs following technical proposal：This intersection combined type U-tube solar heat exchanger
Bending machine, including support, longitudinally rotate on described support and are connected with gyroaxis, and described gyroaxis is connected with revolution thick stick,
Described revolution thick stick is respectively arranged at two ends with gyro black assembly, described gyroaxis and the driving that gyroaxis can be driven to circumferentially rotate
Motor is connected.
In above-mentioned intersection combined type U-tube solar heat exchanger bending machine, the two ends of described revolution thick stick set respectively
There is range hadn wheel, described gyro black assembly is arranged on range hadn wheel.
In above-mentioned intersection combined type U-tube solar heat exchanger bending machine, described gyro black assembly includes that longitudinal direction is wrong
The minute wheel component that position is set, described minute wheel component includes circular curved wheel, and the sidepiece of described circular curved wheel is can be to metal
The guide pad that pipe is oriented to, described circular curved wheel and guide pad are rotated with range hadn wheel and are connected.
In above-mentioned intersection combined type U-tube solar heat exchanger bending machine, it is located at turn around on the range hadn wheel of thick stick one end
Minute wheel component constitute big gyro black assembly, the minute wheel component being located at turn around on the range hadn wheel of the thick stick other end constitutes small gyro black assembly.
In above-mentioned intersection combined type U-tube solar heat exchanger bending machine, described big gyro black assembly it is circular curved
The diameter of wheel is different, including big circular curved wheel and the curved wheel of small circular；The diameter of the circular curved wheel of described small gyro black assembly is identical,
And it is identical with the curved wheel diameter of small circular.
In above-mentioned intersection combined type U-tube solar heat exchanger bending machine, each range hadn wheel is provided with can be by it
In a pedestal for minute wheel component jack-up, described pedestal is provided with some hinge plates being stacked, and described guide pad leads to
Cross the axis of guide to be connected with hinge plate rotation, described circular curved wheel is rotated with hinge plate by locating shaft and is connected, described distance
The side sidepiece of disk is additionally provided with location-plate.
In above-mentioned intersection combined type U-tube solar heat exchanger bending machine, it is provided with the middle part of described circular curved wheel
The positioning round orifice being slidably connected with locating shaft, the sidepiece of circular curved wheel is provided with the flat groove being slidably connected with location-plate, circular curved wheel
Excircle be provided with the interior annular groove being engaged with metal tube.
In above-mentioned intersection combined type U-tube solar heat exchanger bending machine, a side of described guide pad is opened
There is straight line circular trough, the guiding circular hole being connected with the axis of guide is provided with a side angle of straight line circular trough.
In above-mentioned intersection combined type U-tube solar heat exchanger bending machine, fixed cover is connected on described gyroaxis
First bevel gear, fixed cover is connected to the second bevel gear, the first described bevel gear and on the output shaft of described motor
Two bevel gears are meshed.
In above-mentioned intersection combined type U-tube solar heat exchanger bending machine, described guide pad is connected with handle.
Compared with prior art, the advantage of this intersection combined type U-tube solar heat exchanger bending machine is：Using this
Bending machine carries out the processing technologys such as the curving of the different radius of gyration and different gyratory directions, the demoulding to metal tube, can process
The single branch of shaping or branched U-tube constitute an intersection combined type U for being placed on all-glass solar vacuum tubular collector inner tube
Type pipe heat absorbing units, compare than traditional bending process method, and producing efficiency is high, is easy to large-scale production, low manufacture cost, product
Quality is guaranteed.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
Other accompanying drawings are obtained with according to these accompanying drawings.
Fig. 1 is the mach structural representation for intersecting combined type U-tube solar heat exchanger of bend pipe of the present invention.
Fig. 2 is the structural representation of the bending machine that the present invention is provided.
Fig. 3 is the sectional view of the big gyro black assembly that the present invention is provided.
Fig. 4 is the top view of the big gyro black assembly that the present invention is provided.
Fig. 5 is the sectional view of the small gyro black assembly that the present invention is provided.
Fig. 6 is the top view of the small gyro black assembly that the present invention is provided.
Fig. 7 is the sectional view of the circular curved wheel that the present invention is provided.
Fig. 8 is the top view of the circular curved wheel that the present invention is provided.
Fig. 9 is the structural representation at visual angle of the guide pad that the present invention is provided.
Figure 10 is the side view of the guide pad that the present invention is provided.
Figure 11 is the sectional view of the guide pad that the present invention is provided.
Figure 12 is the bent tube technique figure that the present invention is provided.
In figure, support 1, gyroaxis 2, revolution thick stick 3, gyro black assembly 4, motor 5, range hadn wheel 6, minute wheel component 7, circle
Curved wheel 8, metal tube 9, guide pad 10, big gyro black assembly 11, small gyro black assembly 12, the big circular curved curved wheel 14, base of wheel 13, small circular
Seat 15, hinge plate 16, locating shaft 17, location-plate 18, positioning round orifice 19, flat groove 20, interior annular groove 21, straight line circular trough 22,
It is oriented to circular hole 23, the first bevel gear 24, the second bevel gear 25, handle 26, the axis of guide 27.
Specific embodiment
The following is the specific embodiment invented and with reference to accompanying drawing, technical scheme is further described, but
The present invention is not limited to these embodiments.
As shown in figs. 1-12, this intersection combined type U-tube solar heat exchanger bending machine, including support 1, indulges on support 1
To gyroaxis 2 is rotatably connected to, gyroaxis 2 is connected with revolution thick stick 3, and that turns round thick stick 3 is respectively arranged at two ends with gyro black assembly 4, returns
Rotating shaft 2 is connected with the motor 5 that gyroaxis 2 can be driven to circumferentially rotate, and that turns round thick stick 3 is respectively arranged at two ends with range hadn wheel 6,
Gyro black assembly 4 is arranged on range hadn wheel 6, and gyro black assembly 4 includes the minute wheel component 7 of longitudinally displaced setting, and minute wheel component 7 includes circle
The curved wheel 8 of shape, the sidepiece of circular curved wheel 8 is the guide pad 10 that can be oriented to metal tube 9, and guide pad 10 is connected with handle 26
Connect, circular curved wheel 8 and guide pad 10 are rotated with range hadn wheel 6 and be connected, and fixed cover is connected to the first bevel gear 24 on gyroaxis 2, drives
Fixed cover is connected to the second bevel gear 25 on the output shaft of dynamic motor 5, and the first bevel gear 24 and the second bevel gear 25 are meshed.
The curving of the different radius of gyration and different gyratory directions, demoulding etc. are carried out to metal tube 9 using the bending machine to add
Work technique；Can machine-shaping list branch or branched U-tube constitute one be placed in all-glass solar vacuum tubular collector
The intersection combined type U-tube heat absorbing units of pipe；And meet multiple heat absorbing units be sequentially connected from head to tail to form series connection medium lead to
Road, constitutes low-temperature heat collection device in large-scale solar energy.Compared than traditional bending process method, it is high with producing efficiency, it is easy to rule
Modelling is produced, low manufacture cost, the advantages of product quality is guaranteed.
Wherein, the minute wheel component 7 being located at turn around on the range hadn wheel 6 of the one end of thick stick 3 constitutes big gyro black assembly 11, is located at turn around thick stick
Minute wheel component 7 on the range hadn wheel 6 of 3 other ends constitutes small gyro black assembly 12.The guide pad 10 of big gyro black assembly 11 counterclockwise around
When circular curved wheel 8 is rotated, the guide pad 10 of small gyro black assembly 12 must be rotated clockwise about the curved wheel 8 of circle, both directions
Conversely.The diameter of the circular curved wheel 8 of big gyro black assembly 11 is different, including big circular curved wheel 13 and the curved wheel 14 of small circular；Small revolution
The diameter of the circular curved wheel 8 of component 12 is identical, and 14 diameters of wheel curved with small circular are identical.
Further, be provided with can be by the pedestal 15 of one of jack-up of minute wheel component 7, on pedestal 15 for each range hadn wheel 6
Some hinge plates 16 being stacked are provided with, guide pad is rotated with hinge plate 16 by the axis of guide 27 and is connected, circular curved wheel 8 passes through
Locating shaft 17 is connected with the longitudinal sliding motion of hinge plate 16, and the side sidepiece of range hadn wheel 6 is additionally provided with location-plate 18.I.e. hinge plate 16 can
Opposing oscillatory, so as to be bent to the specific position of metal tube 9, circular curved wheel 8 can be moved up and down according to circumstances, flexibility
By force.More specifically, the middle part of circular curved wheel 8 is provided with the positioning round orifice 19 being slidably connected with locating shaft 17, the side of circular curved wheel 8
Portion is provided with the flat groove 20 being slidably connected with location-plate 18, and the excircle of circular curved wheel 8 is provided with the annular being engaged with metal tube 9
Groove 21.The radius of positioning round orifice 19 is R, and the caliber of metal tube 9 is D, then：R=D+0.05mm.Interior annular groove 21 it is a diameter of
Φ 1, and Φ 1 is equal to the straightway inward flange width of metal tube 9.The overall diameter of circular curved wheel 8 is equal to Φ 2, and Φ 2 is less than metal tube
9 straightway inward flange width, i.e. Φ 2=Φ 1+2D-b, b=3mm to 5mm.More specifically, a side of guide pad 10
Face is provided with straight line circular trough 22, and circular radius are R1, R1=D/2, are provided with and lead at a side angle of straight line circular trough 22
To the guiding circular hole 23 that axle 27 is connected, bore dia is 6mm.
In Fig. 1, intersect combined type U-tube heat exchanger heat absorbing units to have 4 straightways a, b, c, d to be placed on full glass true
The inner tube of empty solar energy heat collection pipe, therefore, the overall diameter Φ 2 of the curved wheel 14 of small circular depends on the interior of full-glass solar energy vacuum tube
Pipe diameter.Find out simultaneously, the size of the overall diameter Φ 2 of big circular curved wheel 13 depends on branched all glass vacuum heat collection tube of solar energy
Between have certain clipping room away from f；Big circular curved wheel 13 is the smooth revolution between each heat absorbing units, therefore, it is big circular
The size of the overall diameter Φ 2 of curved wheel 13 depends on the distance between all glass vacuum heat collection tube of solar energy.
During the application method of this bending machine, as shown in figure 12, the metal tube 9 of a diameter of D is first placed into the circle being relatively large in diameter
The curved wheel A of shape, when electric drive drives revolution thick stick to rotate clockwise, locating piece is rotated counterclockwise；Revolution thick stick rotates clockwise 180 °
When, 180 ° are also rotated counterclockwise along with locating piece；Complete one it is larger it is U-shaped curve, form a straightway a for U-tube.
At this moment metal tube is taken turns in B, when revolution thick stick rotates counterclockwise 180 °, 180 ° is rotated clockwise along with locating piece；Complete one
It is small it is U-shaped curve, form a straightway b for U-tube.Metal tube is taken turns in C, when revolution thick stick rotates clockwise 180 ° again,
Locating piece also rotates counterclockwise 180 °；Complete again one it is small it is U-shaped curve, form a straightway c for U-tube.Metal tube
In D wheels, when revolution thick stick continues to rotate counterclockwise 180 °, 180 ° are rotated clockwise along with locating piece；A small U is completed again
Type is curved, and forms a straightway d for U-tube.Metal tube is again at A wheels.Thus machine one and intersect combined type U
Type tube solar heat exchanger heat absorbing units, it again 4 straightways and 3 small U-shaped curved, 1 curved compositions of large U type.It is small it is U-shaped it is curved most
Inner tube interior diameter of the big outer rim width less than vacuum tube.The curved width of large U type is adapted with the spacing of vacuum tube.Equally carry out
Operation is stated, multiple identicals is bent out and is intersected combined type U-tube solar heat exchanger heat absorbing units.It is true according to solar thermal collector
The quantity of blank pipe bends out the heat absorbing units of continuous multiple series connection.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all in essence of the invention
Within god and principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (10)
1. it is a kind of to intersect combined type U-tube solar heat exchanger bending machine, including support (1), it is characterised in that described support
(1) longitudinally rotated on and be connected with gyroaxis (2), described gyroaxis (2) is connected with revolution thick stick (3), described revolution thick stick (3)
Be respectively arranged at two ends with gyro black assembly (4), described gyroaxis (2) and the driving electricity that gyroaxis (2) can be driven to circumferentially rotate
Machine (5) is connected.
2. it is according to claim 1 to intersect combined type U-tube solar heat exchanger bending machine, it is characterised in that described
That turns round thick stick (3) is respectively arranged at two ends with range hadn wheel (6), and described gyro black assembly (4) is arranged on range hadn wheel (6).
3. it is according to claim 2 to intersect combined type U-tube solar heat exchanger bending machine, it is characterised in that described
Minute wheel component (7) of the gyro black assembly (4) including longitudinally displaced setting, described minute wheel component (7) includes circular curved wheel (8), institute
The sidepiece of the circular curved wheel (8) stated is the guide pad (10) that can be oriented to metal tube (9), described circular curved wheel (8)
Rotated with range hadn wheel (6) with guide pad (10) and be connected.
4. the intersection combined type U-tube solar heat exchanger bending machine according to claim 1 or 2 or 3, it is characterised in that
The minute wheel component (7) being located at turn around on the range hadn wheel (6) of thick stick (3) one end constitutes big gyro black assembly (11), is located at turn around thick stick (3) another
Minute wheel component (7) on the range hadn wheel (6) of one end constitutes small gyro black assembly (12).
5. it is according to claim 4 to intersect combined type U-tube solar heat exchanger bending machine, it is characterised in that described
The diameter of the circular curved wheel (8) of big gyro black assembly (11) is different, including big circular curved wheel (13) and the curved wheel of small circular (14)；It is described
Small gyro black assembly (12) circular curved wheel (8) diameter it is identical and identical with small circular curved wheel (14) diameter.
6. it is according to claim 3 intersection combined type U-tube solar heat exchanger bending machine, it is characterised in that each away from
Separation disc (6) is provided with can be provided with some by the pedestal (15) of one of minute wheel component (7) jack-up, described pedestal (15)
The hinge plate (16) being stacked, described guide pad is rotated with hinge plate (16) by the axis of guide (27) and is connected, described circle
The curved wheel of shape (8) is connected by locating shaft (17) with hinge plate (16) longitudinal sliding motion, and the side sidepiece of described range hadn wheel (6) also sets
There is location-plate (18).
7. the intersection combined type U-tube solar heat exchanger bending machine according to claim 3 or 6, it is characterised in that described
Circular curved wheel (8) in the middle part of be provided with the positioning round orifice (19) being slidably connected with locating shaft (17), the sidepiece of circular curved wheel (8) is opened
The excircle for having the flat groove (20) being slidably connected with location-plate (18), circular curved wheel (8) is provided with the ring being engaged with metal tube (9)
Shape inner groovy (21).
8. the intersection combined type U-tube solar heat exchanger bending machine according to claim 3 or 6, it is characterised in that described
A side of guide pad (10) be provided with straight line circular trough (22), be provided with a side angle of straight line circular trough (22) with
The guiding circular hole (23) of the axis of guide (27) connection.
9. the intersection combined type U-tube solar heat exchanger bending machine according to claim 1 or 2 or 3, it is characterised in that
Fixed cover is connected to the first bevel gear (24) on described gyroaxis (2), fixedly sleeved on the output shaft of described motor (5)
There is the second bevel gear (25), described the first bevel gear (24) and the second bevel gear (25) is meshed.
10. it is according to claim 3 to intersect combined type U-tube solar heat exchanger bending machine, it is characterised in that described
Guide pad (10) is connected with handle (26).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710274605.3A CN106925647B (en) | 2017-04-25 | 2017-04-25 | A kind of intersection combined type U-tube solar heat exchanger bending machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710274605.3A CN106925647B (en) | 2017-04-25 | 2017-04-25 | A kind of intersection combined type U-tube solar heat exchanger bending machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106925647A true CN106925647A (en) | 2017-07-07 |
| CN106925647B CN106925647B (en) | 2019-03-15 |
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ID=59437089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710274605.3A Active CN106925647B (en) | 2017-04-25 | 2017-04-25 | A kind of intersection combined type U-tube solar heat exchanger bending machine |
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| Country | Link |
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| CN (1) | CN106925647B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107838252A (en) * | 2017-12-18 | 2018-03-27 | 镇江市康特电子有限责任公司 | Crankcase heating hoop former and application method |
| CN109363406A (en) * | 2018-11-01 | 2019-02-22 | 安吉凯信转椅配件厂（普通合伙） | The production technology of handrail inner bracing piece |
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| CN201537645U (en) * | 2009-11-02 | 2010-08-04 | 嘉兴市正兴能源科技有限公司 | Bending machine for continuous turning series-flow pipe |
| KR20120105955A (en) * | 2011-03-17 | 2012-09-26 | 강석민 | Pipe bending apparatus with spiral die roller and control method of pipe bending apparatus |
| CN102858477A (en) * | 2010-06-04 | 2013-01-02 | 武州工业株式会社 | Pipe bender and method for spiral pipe bending with the pipe bender |
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| CN206925183U (en) * | 2017-04-25 | 2018-01-26 | 潍坊强胜新能源有限公司 | One kind intersects combined type U-tube solar heat exchanger bending machine |
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2017
- 2017-04-25 CN CN201710274605.3A patent/CN106925647B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US4723431A (en) * | 1985-01-14 | 1988-02-09 | Serrated Rule Corp. | Method for manufacturing formed metal |
| CN201537645U (en) * | 2009-11-02 | 2010-08-04 | 嘉兴市正兴能源科技有限公司 | Bending machine for continuous turning series-flow pipe |
| CN102858477A (en) * | 2010-06-04 | 2013-01-02 | 武州工业株式会社 | Pipe bender and method for spiral pipe bending with the pipe bender |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107838252A (en) * | 2017-12-18 | 2018-03-27 | 镇江市康特电子有限责任公司 | Crankcase heating hoop former and application method |
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| CN109363406A (en) * | 2018-11-01 | 2019-02-22 | 安吉凯信转椅配件厂（普通合伙） | The production technology of handrail inner bracing piece |
| CN109363406B (en) * | 2018-11-01 | 2021-07-30 | 安吉凯信转椅配件厂（普通合伙） | Production process of inner support rod of handrail |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106925647B (en) | 2019-03-15 |
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