CN109746314A - An adjustable discrete roll forming machine - Google Patents
An adjustable discrete roll forming machine Download PDFInfo
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- CN109746314A CN109746314A CN201910125002.6A CN201910125002A CN109746314A CN 109746314 A CN109746314 A CN 109746314A CN 201910125002 A CN201910125002 A CN 201910125002A CN 109746314 A CN109746314 A CN 109746314A
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- 230000007246 mechanism Effects 0.000 claims abstract description 64
- 230000005540 biological transmission Effects 0.000 claims abstract description 30
- 238000005096 rolling process Methods 0.000 claims abstract description 19
- 230000033001 locomotion Effects 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims description 11
- 230000006870 function Effects 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 6
- 239000007779 soft material Substances 0.000 claims description 3
- 230000003139 buffering effect Effects 0.000 claims description 2
- 230000008859 change Effects 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims 8
- 229910052742 iron Inorganic materials 0.000 claims 3
- 235000000396 iron Nutrition 0.000 claims 1
- 238000000926 separation method Methods 0.000 claims 1
- 238000011089 mechanical engineering Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000009711 regulatory function Effects 0.000 description 1
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- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
一种可调离散辊滚压成形机，属于机械工程领域。离散辊滚压成形机构由传动机构、调形机构、夹持机构和引导机构四部分组成。传动机构由两条传动路线组成，分别实现调形机构的上下移动和左右移动，两条路线互不干扰，确保调形单元位置的准确性。调形机构通过丝杠的旋转来实现调形单元的上升或下降以便离散刚性辊形成不同的曲率，再由锥齿轮组和蜗杆的配合来实现刚性辊滚压成形不同曲率的曲面件。夹持机构利用夹钳夹紧板材，通过PLC控制电动伸缩杆的运动实现夹钳的随动功能，有助于刚性辊的滚压，使板材更加容易地贴敷在柔性模具型面上成形。引导机构利用调距丝杠可以调整两个引导棒的距离，引导棒通过自身的外螺纹特征实现其高度可调的功能，引导机构采用触点摩擦的形式进行加工后板材的引导，防止加工后的板材在远离刚性辊时发生较大的回弹现象。本发明结构精简、效率高，适用于不同形状的三维曲面件成形。
An adjustable discrete roller rolling forming machine belongs to the field of mechanical engineering. The discrete roll forming mechanism consists of four parts: transmission mechanism, shape adjustment mechanism, clamping mechanism and guiding mechanism. The transmission mechanism is composed of two transmission routes, which respectively realize the up and down movement and the left and right movement of the shape adjustment mechanism. The two routes do not interfere with each other to ensure the accuracy of the position of the shape adjustment unit. The shape adjustment mechanism realizes the rise or fall of the shape adjustment unit through the rotation of the lead screw so that the discrete rigid rollers can form different curvatures, and then the rigid rollers are rolled to form curved surfaces with different curvatures through the cooperation of the bevel gear set and the worm. The clamping mechanism uses clamps to clamp the plate, and controls the movement of the electric telescopic rod through PLC to realize the follow-up function of the clamp, which is helpful for the rolling of the rigid roller and makes the plate easier to form on the flexible mold surface. The guide mechanism can adjust the distance between the two guide rods by using the pitch screw. The guide rod realizes its height-adjustable function through its own external thread characteristics. The guide mechanism uses the form of contact friction to guide the processed sheet to prevent The sheet has a larger springback phenomenon when it is away from the rigid roller. The invention has simple structure and high efficiency, and is suitable for forming three-dimensional curved parts of different shapes.
Description
Technical field
Adjustable discrete roller roller head machine is a kind of sheet material forming device of high-efficiency soft, belongs to mechanical engineering field,
Three-dimension curved surface part flexible forming of different shapes may be implemented.
Background technique
In modern industry, metal three-dimension curved surface part is widely used in automobile, shipbuilding, aerospace, chemical industry, city are built
All conglomeraties such as build.Automobile industry needs a large amount of Three-dimension curved surface part, and this production in enormous quantities pattern mainly uses die forming,
And for die forming should not be used as this single-piece such as shipbuilding, aerospace or small lot production model, it needs using flexibility
Forming technique and equipment meet its industry requirement.The present invention proposes to realize that three-dimension curved surface part continuously rolls using adjustable discrete roller
The technology of forming, the technology combine multi-point shape adjusting with tension and compression technology, and the curved of discrete rigid roller is controlled by multi-point shape adjusting
Curved shape realizes the three-dimension curved surface rolling forming of plate by working roll itself rotary motion；When needing to shape another
The curved-surface piece of shape only need to readjust working roll distribution form and bending curvature, provide for three-dimensional curve generation of sheet
A kind of high efficiency, low cost, flexibility new technique, have extensively in industries such as aviation, chemical industry, shipbuilding and urban architectures
Application prospect.
Summary of the invention
The present invention is to provide a kind of device of forming technique realization plate flexible forming rolled using multiple roll, and purpose exists
In replacing traditional die-forming techniques, rolling forming is carried out to plate using multiple discrete rigid rollers, realizes various shapes
Three-dimension curved surface part high efficiency, low cost and flexibility forming.
The above-mentioned purpose of adjustable discrete roller roller head machine of the invention be achieved in that be described with reference to the drawings it is as follows:
Adjustable discrete roller roller head machine is equipped with the internal screw thread cooperated with lead screw in the upper end of shape adjusting unit, passes through lead screw
Effect adjusts the height of shape adjusting unit, to realize the variation of different curvature.Being equipped in the bottom of shape adjusting unit can be at -30 °
The rigid roller rotated freely between to 30 °, for adapting to the sheet fabrication of different curvature.
The transmission mechanism of the adjustable discrete roller roller head machine is made of two drive paths, realizes adjust shape machine respectively
Structure moving up and down and moving left and right.First power transmission route is that power by bevel gear set one is transmitted to transmission by motor
Power is transmitted to bevel gear set two again by axis, transmission shaft, and bevel gear set two drives down-feed screw rotation to realize entire Tiao Xing mechanism
Up and down motion.Article 2 power transmission route is that servo motor drives the slideway gear being mounted on gear-box and is mounted on tool
There is the rack gear cooperation on the supporting plate of rolling slideway, realizes moving left and right for entire Tiao Xing mechanism.
The Tiao Xing mechanism of the adjustable discrete roller roller head machine is designed to T-shaped shape, by bevel gear set, worm screw,
Rigid roller, lead screw, transmission shaft, sliding axle and hollow shaft composition.Tiao Xing mechanism realizes shape adjusting unit by the rotation of lead screw
It rises or falls so that discrete rigid roller forms different curvature, then realizes that rigid roller rolls by the cooperation of bevel gear set and worm screw
The curved-surface piece of pressing formation different curvature.
The clamping device of the adjustable discrete roller roller head machine by electric telescopic rod, lifting nut, pressure sensor,
Clamp and motor form.It clamps plate both ends progress position using clamp to fix, Tiao Xing mechanism acts on holding by lead screw
Discrete roller existing curvature while carry out whole whereabouts, until rigid roller contacts plate and applies certain pressure, then by sliding
Road gear drives entire Tiao Xing mechanism to be moved left and right, and so that plate is sticked on flexible die type face by the rolling of rigid roller
On, realize the lag function of clamp.Whole process carries out signal acquisition by PLC and controls servo motor, it is ensured that each movement is single
First position it is accurate.
The guiding mechanism of the adjustable discrete roller roller head machine is symmetric, the external screw thread that guide rod passes through itself
Feature realizes its height-adjustable function, using the distance of adjustable two guide rods of roll adjustment lead screw, nose is guided to be attached to
The plate surface completed the process is equipped with soft material in the front end of guide rod, prevents from causing scratch to machined plate surface.It adopts
The guidance of plate after being processed with the form that contact rubs, the plate after preventing processing occur biggish when far from rigid roller
Rebound phenomenon.
Present invention proposition uses surface smooth and discrete rigid roller with high hardness is as forming tool, realizes three-dimension curved surface zero
Part progressive forming can satisfy efficient, the quick manufacture of multi-varieties and small-batch Three-dimension curved surface part.In the production of three-dimension curved surface part
Using adjustable discrete rigid roller rolling forming technology will by save mold and its processing and manufacturing expense, save equipment investment and
Workshop cost reduces the links such as production cost as the huge economic benefit of sheet metal component manufacturing enterprise creation and social benefit.
Detailed description of the invention
Fig. 1 is the general structure schematic diagram of adjustable discrete roller roller head machine.
Fig. 2 is the three-dimensional structure view of adjustable discrete roller roller head machine.
Fig. 3 is the tune shape structural scheme of mechanism of adjustable discrete roller roller head machine.
Fig. 4 is the clamping device schematic diagram of adjustable discrete roller roller head machine.
Fig. 5 is the guiding mechanism schematic diagram of adjustable discrete roller roller head machine.
Specific embodiment
Illustrated embodiment further illustrates the tool of the adjustable discrete roller roller head machine of the invention patent with reference to the accompanying drawing
Appearance and its course of work in vivo.
Fig. 1 is the general structure schematic diagram of adjustable discrete roller roller head machine, mainly by transmission mechanism, Tiao Xing mechanism, folder
Hold mechanism and guiding mechanism composition.The transmission mechanism is made of two drive paths, and first drive path is motor
(18) power is transmitted to transmission shaft (20) by bevel gear set one (19), power is transmitted to bevel gear set two again by transmission shaft (20)
(17), bevel gear set two (17) drives down-feed screw (13) rotation to realize the up and down motion of entire Tiao Xing mechanism；Article 2 passes
Dynamic route is that servo motor drives the slideway gear (1) being mounted on gear-box (21) that there is the supporting plate of rolling slideway to move up
Dynamic, rolling slideway (16) is designed to the driving form of rack-and-pinion to realize moving left and right for entire Tiao Xing mechanism.The tune
Shape mechanism upper end is equipped with the internal screw thread cooperated with lead screw (105), and the height of shape adjusting unit is adjusted by the effect of lead screw (105),
To realize the change of different curvature.The rigid roller that can be rotated freely between -30 ° to 30 ° is equipped in the bottom of shape adjusting unit
(102), for adapting to the sheet fabrication of different curvature.The clamping device is by motor (216), caliper body (201), spherical drawing
Bar (217), line handspike (215) composition.The horizontal hinged-support (218) of the mechanism passes through spherical pull rod (217) and is stuck in entire folder
On caliper (201), the lower skewback (204) in insertion caliper body (201) is incorporated into one by spring (206) and material folding block (205)
Rise, what upside combined have fixed plate (207), spring stop piece (208) and press rods pass through one group of spring (212) with it is vertical
Wedge (210) links together, and top cover board (211) closes entire caliper body (201), and horizontal wedge (213) is pushed away by straight line
Bar (215) is connect with motor (216), not only realized with the constraint of vertical wedge (210), but also the constraints of two wedges is realized slow
The encapsulation of entire clamping device is finally realized in punching by outer-hexagonal bolts (214).The guiding mechanism design is before whole
End, guiding mechanism are symmetric, and utilize the distance of adjustable two guide rods (305) of lead screw (303), guide rod (305)
Front end is attached to the plate surface completed the process, and plate is made to be no longer presented the characteristic of flexible body, is equipped in the front end of guide rod (305)
Soft material prevents from causing scratch to machined plate surface.
Fig. 2 is the three-dimensional structure view of adjustable discrete roller roller head machine.The transmission mechanism is with fastening baffle
Motor (18) is fixed on motor supporting plate (22) by fastening bolt, and power is transmitted to biography by bevel gear set one (19) by motor (18)
Power is transmitted to bevel gear set two (17) by moving axis (20), transmission shaft (20), and bevel gear set two (17) drives down-feed screw (13) rotation
Turn, realizes the up and down motion of entire shape adjusting unit.Rolling slideway (16) is designed to the driving form of gear, rack gear, and rack gear is logical
It crosses fastening screw to be fixed on the supporting plate with rolling slideway (16), slideway gear (1) is mounted on gear-box (20), servo electricity
Machine passes through band sliding way gear (1) and rolls on rack gear, so that entire gear-box (20) is driven to be moved, gear-box (20)
Edge be equipped with the mutually matched wedge-shaped guide rail of supporting plate, ensure that entire gear-box (20) only one prismatic pair, realized with this
Entire shape adjusting unit moves left and right.
The tune shape structural scheme of mechanism of Fig. 3 is adjustable discrete roller roller head machine.The mechanism is designed to T-shaped shape, by cone tooth
Wheel group (101), worm screw (103), rigid roller (102), lead screw (105), transmission shaft (107), sliding axle (109), hollow shaft (108)
Composition.Lead screw (105) is cooperated by lead key (106) and internal thread hole, and motor is adjusted by driving lead screw (105) rotation
Section shape adjusting unit rises or falls, and realizes the variation of discrete rigid roller different curvature.Sliding axle (109) one end and bevel gear
(101) it connects, another bevel gear (101) is connected with worm screw (103), and bevel gear is intermeshed between (101), rigid roller
(102) at worm gear form, bevel gear set (101) delivers power to worm screw (103) and worm gear is driven to realize rigid roller medium design
(102) rotation and lasting torque.Sliding axle (109) is mounted in hollow shaft (108), and bevel gear (101) rotation, which drives, to be slided
Moving axis (109) moves up and down, and realizes power output by transmission shaft (107), guarantees still have centainly during adjusting shape
Torque.
Fig. 4 is the clamping device schematic diagram of adjustable discrete roller roller head machine.The horizontal hinged-support (218) of the mechanism passes through
Spherical pull rod (217) is stuck on entire caliper body (201), and vertical hinged-support (202) is directly fixed on caliper body (201) lower part,
Lower skewback (204) in insertion caliper body (201) is combined by spring (206) with material folding block (205), and upside is incorporated into
Together there are fixed plate (207), spring stop piece (208) and press rods to be connect with vertical wedge (210) by one group of spring (212)
Together, top cover board (211) closes entire caliper body (201), and horizontal wedge (213) passes through line handspike (215) and direct current
Decelerating motor (216) connection, not only realized with the constraint of vertical wedge (210), but also buffering is realized to the constraints of two wedges, finally
The assembly of entire clamping device is realized by outer-hexagonal bolts (214).Clamping device clamps plate both ends progress position and fixes, and adjusts shape
Mechanism remains discrete roller (102) existing curvature by the effect of lead screw (105), and motor (18) will by bevel gear set one (19)
Power is transmitted to transmission shaft (20), and power is transmitted to bevel gear set two (17) by transmission shaft (20), and bevel gear set two (17) drives vertical
Lead screw (13) rotation, realizes the whereabouts of entire shape adjusting unit, until rigid roller (102) contact plate and applies certain pressure,
It is rolled on rack gear by slideway gear (1) again, so that entire gear-box (20) be driven to be moved, realizes entire shape adjusting unit
It moves left and right, sticks on plate on flexible die (7) type face by the rolling of rigid roller (102), realize Three Dimensional Thin part
Forming.
Fig. 5 is the guiding mechanism schematic diagram of adjustable discrete roller roller head machine.The mechanism is symmetric, by gear-box
(302), roll adjustment lead screw (303), spanner (304), guide rod (305), locating piece (306) composition.Roll adjustment lead screw is installed on (303)
There is locating piece (306) to be positioned, locating piece (306) is fixedly connected with gear-box (302), is adjusted on the left of locating piece (306)
Be away from lead screw (303) rotation direction it is left-handed, roll adjustment lead screw (303) rotation direction on the right side of locating piece (306) is dextrorotation, by pulling spanner
(304), two guide rods (305), which are done, closes up or disengaging movement, realizes the roll adjustment function of guide rod (305).Guide rod (305)
Height there is adjustable function, one end of guide rod (305) is designed to external thread form, it is only necessary to by guide rod (305)
It is rotated, can realize regulatory function.
Content described in the figures above should be understood that illustratively the present invention is not limited by such examples.Although
The illustrative example of transmission mechanism, Tiao Xing mechanism, clamping mechanism and guiding mechanism, those skilled in the art are given in specification
Member can carry out various changes or equivalent replacement to it on the basis of the present invention, according to actual needs other tune shapes of unrestricted choice
Mechanism and its driving form etc..Obviously, these changes or equivalent replacement should be included in the scope of the present invention.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910125002.6A CN109746314B (en) | 2019-02-20 | 2019-02-20 | An adjustable discrete roll forming machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910125002.6A CN109746314B (en) | 2019-02-20 | 2019-02-20 | An adjustable discrete roll forming machine |
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| Publication Number | Publication Date |
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| CN109746314A true CN109746314A (en) | 2019-05-14 |
| CN109746314B CN109746314B (en) | 2020-06-16 |
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| CN201910125002.6A Expired - Fee Related CN109746314B (en) | 2019-02-20 | 2019-02-20 | An adjustable discrete roll forming machine |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114211773A (en) * | 2021-11-23 | 2022-03-22 | 江苏东方神鹰空天新材料科技有限公司 | Carbon fiber composite material layer manufacturing tool and method |
| CN116853601A (en) * | 2023-07-03 | 2023-10-10 | 燕山大学 | A high-temperature alloy bar hard-coated cylindrical rolling automatic packaging equipment |
| CN117225986A (en) * | 2023-11-10 | 2023-12-15 | 山东龙光天旭太阳能有限公司 | Solar condensing plate forming equipment for photo-thermal power generation |
| CN122184200A (en) * | 2026-05-14 | 2026-06-12 | 同济大学 | Intelligent self-adaptive variable cross-section plate robot roll forming equipment and roll forming method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101648235A (en) * | 2009-08-20 | 2010-02-17 | 吉林大学 | Flexible roller contact molding rolling forming device |
| CN101690960A (en) * | 2009-10-09 | 2010-04-07 | 吉林大学 | High-flexibility multi-head stretching machine |
| CN102151732A (en) * | 2010-12-24 | 2011-08-17 | 吉林大学 | Three-dimensional curved surface roll forming device |
| KR20110106491A (en) * | 2010-03-23 | 2011-09-29 | 대우조선해양 주식회사 | Surface Forming Device for Metal Plate |
| CN106734415A (en) * | 2017-02-06 | 2017-05-31 | 吉林大学 | Metal composite slab three-dimension curved surface progressive forming device |
| CN106825183A (en) * | 2017-01-18 | 2017-06-13 | 吉林大学 | The curved surface stretch forming device of multipoint excitation control |
-
2019
- 2019-02-20 CN CN201910125002.6A patent/CN109746314B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101648235A (en) * | 2009-08-20 | 2010-02-17 | 吉林大学 | Flexible roller contact molding rolling forming device |
| CN101690960A (en) * | 2009-10-09 | 2010-04-07 | 吉林大学 | High-flexibility multi-head stretching machine |
| KR20110106491A (en) * | 2010-03-23 | 2011-09-29 | 대우조선해양 주식회사 | Surface Forming Device for Metal Plate |
| CN102151732A (en) * | 2010-12-24 | 2011-08-17 | 吉林大学 | Three-dimensional curved surface roll forming device |
| CN106825183A (en) * | 2017-01-18 | 2017-06-13 | 吉林大学 | The curved surface stretch forming device of multipoint excitation control |
| CN106734415A (en) * | 2017-02-06 | 2017-05-31 | 吉林大学 | Metal composite slab three-dimension curved surface progressive forming device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114211773A (en) * | 2021-11-23 | 2022-03-22 | 江苏东方神鹰空天新材料科技有限公司 | Carbon fiber composite material layer manufacturing tool and method |
| CN116853601A (en) * | 2023-07-03 | 2023-10-10 | 燕山大学 | A high-temperature alloy bar hard-coated cylindrical rolling automatic packaging equipment |
| CN117225986A (en) * | 2023-11-10 | 2023-12-15 | 山东龙光天旭太阳能有限公司 | Solar condensing plate forming equipment for photo-thermal power generation |
| CN117225986B (en) * | 2023-11-10 | 2024-03-26 | 潍坊市经济学校 | Solar condensing plate forming equipment for photo-thermal power generation |
| CN122184200A (en) * | 2026-05-14 | 2026-06-12 | 同济大学 | Intelligent self-adaptive variable cross-section plate robot roll forming equipment and roll forming method |
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| CN109746314B (en) | 2020-06-16 |
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