CN210023367U - Three-dimensional hot stretch bending forming device capable of controlling shape and temperature in segmented mode - Google Patents
Three-dimensional hot stretch bending forming device capable of controlling shape and temperature in segmented mode Download PDFInfo
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- CN210023367U CN210023367U CN201920491412.8U CN201920491412U CN210023367U CN 210023367 U CN210023367 U CN 210023367U CN 201920491412 U CN201920491412 U CN 201920491412U CN 210023367 U CN210023367 U CN 210023367U
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- 238000005452 bending Methods 0.000 title claims abstract description 53
- 238000009413 insulation Methods 0.000 claims abstract description 55
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 28
- 238000004321 preservation Methods 0.000 claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 16
- 239000002184 metal Substances 0.000 claims abstract description 15
- 229910052751 metal Inorganic materials 0.000 claims abstract description 15
- 239000010425 asbestos Substances 0.000 claims abstract description 11
- 229910052895 riebeckite Inorganic materials 0.000 claims abstract description 11
- 230000001681 protective effect Effects 0.000 claims abstract description 6
- 238000009529 body temperature measurement Methods 0.000 claims description 4
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims description 3
- 239000011094 fiberboard Substances 0.000 claims description 3
- 229910052863 mullite Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 15
- 230000011218 segmentation Effects 0.000 abstract description 4
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 10
- 229910001069 Ti alloy Inorganic materials 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005253 cladding Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
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Abstract
The utility model discloses a three-dimensional hot stretch bending forming device with sectional shape control and temperature control, which mainly comprises a base, a sectional heat preservation box, a forming unit, a hydraulic oil cylinder bracket, a hydraulic oil cylinder, a transformer and a temperature control cabinet; wherein, the base is L-shaped, and a plurality of T-shaped grooves are longitudinally arranged; the forming unit is arranged in the T-shaped groove through a T-shaped sliding block at the bottom of the support; the segmented insulation can is arranged on a slide block guide rail of the forming unit, and openings at two sides of the segmented insulation can are sealed by a high-temperature-resistant flexible protective curtain and an asbestos net; a piston rod of the hydraulic oil cylinder is fixedly connected with the forming unit back plate; the section bar adopts self-resistance heating, a temperature control cabinet controls resistance wire heating and thermocouple data acquisition; the utility model discloses a design has independent heat preservation nature, and the segmentation accuse shape temperature regulating device of forming in-process along with the section motion has improved heating efficiency and temperature control precision to realized that the three-dimensional hot stretch bending of flexibility, high efficiency, low cost of difficult processing metal section under the normal atmospheric temperature is accurate takes shape.
Description
Technical Field
The utility model relates to a three-dimensional hot stretch bending forming device of segmentation accuse shape accuse temperature, specifically speaking relates to a device that is used for aircraft or rail train titanium alloy section bar hot stretch bending to take shape, belongs to the metal section bar stretch bending and takes shape technical field.
Background
The three-dimensional stretch bending forming piece of the metal section can be widely applied to the production of three-dimensional framework structural members of bodies of aerospace, rail trains, automobiles and the like. The principle of stretch-bending forming is to apply tangential tension to the profile, and to bend the profile by changing the position of the internal neutral layer. The stretch bending process has good forming effect on bent parts with high yield strength, high bending quality and small rebound quantity, so that the stretch bending process is widely applied to forming and manufacturing of airplane fuselages, bulkheads, ribs and engine frame connecting pieces. At present, three-dimensional bending structural parts are generally processed and formed by adopting a three-dimensional stretch bending forming technology of an integral die or a multi-point die. For metal materials with good formability at normal temperature, the required three-dimensional bent part can be precisely formed only at room temperature, however, for metal materials with poor formability at normal temperature, such as titanium alloy and other materials which are difficult to machine, the metal materials have large deformation resistance, poor plasticity and narrow processing window at normal temperature, higher requirements are provided for forming equipment, and the parts are difficult to realize precise plastic forming at room temperature.
For the processing of such a material difficult to deform, a titanium alloy is taken as an example, and plastic forming processing is generally performed after heating by a self-resistance heating method or the like. However, the following problems exist in the field of hot stretch bending forming of metal profiles: firstly, the process method and the device of the existing metal stretch-bending forming piece mainly aim at two-dimensional hot stretch-bending forming, the research on the three-dimensional hot stretch-bending forming piece is relatively less, the technology is immature, and the equipment and the process are not perfect; secondly, for the hot stretch-bending forming of multiple spot three-dimension, generally adopt whole insulation can, wholly cladding the mould in the box, the shortcoming is: the heating space is large, the energy consumption is high, the temperature measurement is not accurate enough and has time delay, and at present, a set of good and efficient heating and heat-preserving device and a set of good and efficient heating and heat-preserving method are not available.
In order to solve the problem of three-dimensional hot stretch bending forming of materials difficult to deform, such as titanium alloy and the like, a three-dimensional hot stretch bending forming device and a process method for metal profiles are needed to be designed, and the three-dimensional hot stretch bending forming device with independent heat preservation property and sectional shape control and temperature control is provided, so that flexible, efficient and low-cost three-dimensional hot stretch bending accurate forming of the metal profiles is realized.
Disclosure of Invention
In view of the current situation of three-dimensional stretch-bending forming production, the utility model provides a three-dimensional hot stretch-bending forming device of segmentation accuse shape accuse temperature has designed a segmentation insulation can that has independent heat preservation property. Compared with an integral type heat preservation box, the independent heat preservation effect is better, the efficiency is higher, the segmented heat preservation box is arranged on the forming unit, the forming unit and the segmented heat preservation box are combined into a follow-up structure, an integral relatively closed space is formed, the positioning of the hydraulic oil cylinder is more accurate, and the heat preservation efficiency is better. The wall surface of the segmented insulation can adopts a structure of a heat insulation layer and a metal shell, wherein the heat insulation layer adopts a mullite fiberboard, and the metal shell adopts heat-resistant stainless steel. An opening is reserved at the top of each segmented insulation box and used for connecting resistance wires and thermocouples in the segmented insulation boxes with a temperature control cabinet, the segmented insulation boxes are connected through high-temperature-resistant flexible protective curtains, the opening parts of the segmented insulation boxes close to the two sides of the clamp are sealed by asbestos meshes, and the size of the opening of each asbestos mesh is determined according to the cross section area and the bending shape of the sectional material, so that the dissipation of heat in the segmented insulation boxes is reduced. By using resistance wire heating equipment with high thermal response speed, the temperature inside each segmented insulation can be displayed on a temperature display instrument, the temperature inside each segmented insulation can be detected in real time, and the optimal stretch bending forming temperature of the section bar is achieved. The section bar adopts self-resistance heating, and the section bar and the clamp are insulated by an insulating block. To sum up, the utility model discloses a section accuse control by temperature change shape multiple spot three-dimensional hot stretch bending of metal sectional material.
From top to bottom, the utility model provides a problem that present three-dimensional stretch bending field is difficult to solve as follows:
(1) the multipoint three-dimensional hot stretch bending forming of the metal section is realized;
(2) aiming at the problems of high energy consumption and low efficiency of the whole heat preservation box, a segmented heat preservation box with independent heat preservation property is designed, and independent heat preservation aiming at each forming unit is realized;
the sectional heat insulation boxes with large quantity and small space are designed aiming at the problem that the temperature measurement is not accurate enough and has time delay due to the large space of the whole heat insulation box, so that the heating and temperature measurement can be more accurate.
Drawings
FIG. 1: a structural schematic diagram of a three-dimensional hot stretch bending forming device with sectional shape control and temperature control.
FIG. 2: the structure schematic diagram of the multipoint three-dimensional hot stretch bending follow-up forming device.
FIG. 3: the structure schematic diagram of the three-dimensional stretch bending forming device is shown when no segmented insulation can is provided.
FIG. 4: the sectional insulation can is schematically shown in the figure.
FIG. 5: the structure of the forming unit is schematic.
FIG. 6: the structure of the horizontal pin shaft is schematic.
In the figure: 1. the device comprises a base, a sectional heat preservation box, a forming unit, a hydraulic oil cylinder support, a hydraulic oil cylinder, a piston rod, a transformer, a temperature control cabinet, a asbestos gauze, a high-temperature-resistant flexible protective curtain, a clamp, an insulating block, a section bar 13, a thermocouple 14, a resistance wire 15, a height limiting cushion block 16, a support 17, a bolt 18, a forming unit back plate 19, a height limiting rod 20, a forming unit top plate 21, a sliding block guide rail 22, a vertical pin shaft 23, a forming surface bottom plate 24, a forming surface 25, a sliding block 26 and a horizontal pin shaft 27.
Detailed Description
The present embodiment will be described with reference to the accompanying drawings and examples
A three-dimensional hot stretch bending forming device with sectional shape control and temperature control is characterized by comprising a base 1, a sectional heat preservation box 2, a forming unit 3, a hydraulic oil cylinder support 4, a hydraulic oil cylinder 5, a transformer 7 and a temperature control cabinet 8. The forming unit 3 is arranged on the base 1, the segmented insulation boxes 2 are arranged on a slide block guide rail 22 of the forming unit 3, a piston rod 6 of the hydraulic oil cylinder 5 is fixedly connected with a forming unit back plate 19, the segmented insulation boxes 2 and the forming unit 3 can longitudinally slide along the base 1 under the action of the hydraulic oil cylinder 5, openings of the adjacent segmented insulation boxes 2 are connected through a high-temperature-resistant flexible protective curtain 10, openings of the segmented insulation boxes 2 close to two sides of the clamp 11 are sealed by asbestos meshes 9, and the size of the opening of each asbestos mesh 9 is determined according to the cross-sectional area and the bending shape of the section bar 13. The section 13 is heated by self-resistance and is connected with the transformer 7 through a cable. An insulating block 12 is adopted to insulate the clamp 11 from the section bar 13, and the temperature control cabinet 8 controls the temperature of the segmented insulation can 2 through a cable control thermocouple 14 and a resistance wire 15.
The forming unit 3 and the segmented insulation can 2 are independently insulated in a follow-up mode, and the segmented insulation can 2 is installed on a slide block guide rail 22 of the forming unit 3, moves together under the action of the hydraulic oil cylinder 5 and is positioned by the hydraulic oil cylinder 5.
The base 1 is L-shaped, a plurality of T-shaped grooves are formed in the longitudinal direction, and the hydraulic oil cylinder 5 is installed on the base 1 and the hydraulic oil cylinder support 4.
The segmented insulation can 2 is a box body, and a thermocouple 14 and a resistance wire 15 are arranged in the segmented insulation can and used for measuring temperature and heating. The wall surface of the segmented insulation can 2 adopts a structure of an insulation layer and a metal shell, wherein the insulation layer adopts a mullite fiberboard, and the metal shell adopts heat-resistant stainless steel.
The forming unit back plate 19 and the sliding block guide rail 22 are arranged on the bracket 17 through bolts 18, the height limiting rod 20 and the height limiting cushion block 16 limit the displacement of the sliding block 26, the sliding block 26 is connected with the forming surface bottom plate 24 through a vertical pin shaft 23, the forming surface bottom plate 24 can rotate around the vertical pin shaft 23, the forming surface bottom plate 24 is connected with the forming surface 25 through a horizontal pin shaft 27, the forming surface 25 can rotate around the horizontal pin shaft 27, and the forming unit 3 can longitudinally slide along a T-shaped groove of the base 1.
The temperature control cabinet 8 is of a cabinet type structure, a plurality of temperature display instruments are installed on a control panel, each temperature display instrument corresponds to a thermocouple 14 in different segmented insulation boxes 2, and the temperature in each segmented insulation box 2 can be read visually.
The transformer 7 is a product customized according to requirements, the input end of the transformer is an alternating current power supply, and the output end of the transformer is a direct current power supply within a safe voltage.
When the workpiece is processed, the number of the forming units can be correspondingly increased or decreased according to actual conditions.
In the first embodiment, taking hot stretch bending of a titanium alloy section with a rectangular cross section as an example, a forming process of a three-dimensional hot stretch bending forming device with sectional shape control and temperature control includes the following specific steps:
the method comprises the steps of firstly, projecting a section of circular arc on a horizontal plane and a vertical plane of a target part respectively, calculating bending parameters in the horizontal direction and the vertical direction, determining the number of forming units, determining the size of an opening of an asbestos cloth in a segmented insulation box, and calculating the extension length of a piston rod of a hydraulic oil cylinder.
And secondly, manually adjusting a height limiting rod, adjusting a height limiting cushion block, installing the segmented insulation can on a slide block guide rail of the forming unit, installing a hydraulic oil cylinder, installing the forming unit and the segmented insulation can on a base, fixedly connecting a piston rod of the hydraulic oil cylinder with a back plate of the forming unit, and adjusting each forming unit and the segmented insulation can on the same straight line by using the hydraulic oil cylinder.
And thirdly, installing a high-temperature-resistant flexible protective curtain, enabling the section to penetrate through the forming unit and the inside of the segmented insulation can, installing an asbestos net, sleeving insulating blocks on two ends of the section, clamping the insulating blocks and the section by a clamp, starting a self-resistance heating loop, controlling resistance wires inside the segmented insulation can by the temperature control cabinet, heating the internal environment of the segmented insulation can, measuring the temperature by a thermocouple, and observing the reading on an instrument of the temperature control cabinet to enable the temperature to reach a preset value.
And fourthly, in the stretch bending forming process of the sectional materials, the forming unit and the segmented insulation boxes move along the direction of the T-shaped groove of the base under the action of a hydraulic oil cylinder and stop moving when moving to a stop point, meanwhile, in the moving process of the forming unit and the segmented insulation boxes, the clamp drives the sectional materials to move horizontally at the same speed, after the forming unit and the segmented insulation boxes stop moving, the clamp drives the sectional materials to continue moving, the sectional materials are gradually attached to a forming surface to be subjected to stretch bending forming in the horizontal direction, after the stretch bending forming is finished, the clamp drives the sectional materials to move in the vertical direction to be subjected to stretch bending forming in the vertical direction, after the stretch bending forming is finished, the clamp is kept still, the segmented insulation boxes are used for heat preservation, and a temperature control.
And fifthly, after preserving heat for a preset time according to the process requirements, closing the transformer, naturally cooling the section in the air, then detaching the asbestos gauze, manually taking out the section, and moving the forming unit and the segmented heat preservation box to the initial positions by using a hydraulic oil cylinder, thereby completing the multipoint three-dimensional hot stretch bending of the titanium alloy section with the rectangular section.
Claims (8)
1. A three-dimensional hot stretch bending forming device with sectional shape control and temperature control is characterized by comprising a base (1), a sectional heat preservation box (2), a forming unit (3), a hydraulic oil cylinder bracket (4), a hydraulic oil cylinder (5), a transformer (7) and a temperature control cabinet (8); the forming unit (3) is arranged on the base (1), the segmented insulation boxes (2) are arranged on a slide block guide rail (22) of the forming unit (3), a piston rod (6) of a hydraulic oil cylinder (5) is fixedly connected with a forming unit back plate (19), the segmented insulation boxes (2) and the forming unit (3) can longitudinally slide along the base (1) under the action of the hydraulic oil cylinder (5), the openings of the adjacent segmented insulation boxes (2) are connected through a high-temperature-resistant flexible protective curtain (10), the openings of the segmented insulation boxes (2) close to the two sides of a clamp (11) are sealed by asbestos meshes (9), the size of the openings of the asbestos meshes (9) is determined according to the cross-sectional area and the bending shape of the section bar (13), the section bar (13) is heated in a self-resistance mode and is connected with a transformer (7) through a cable; an insulating block (12) is adopted to insulate the clamp (11) and the section bar (13), and a temperature control cabinet (8) controls the temperature of the segmented insulation can (2) through a cable control thermocouple (14) and a resistance wire (15).
2. The three-dimensional hot stretch bending forming device with the segmented shape control and the temperature control according to claim 1, characterized in that: the forming unit (3) and the segmented insulation box (2) are independently insulated in a follow-up mode, and the segmented insulation box (2) is installed on a slide block guide rail (22) of the forming unit (3), moves together under the action of a hydraulic oil cylinder (5) and is positioned by the hydraulic oil cylinder (5).
3. The three-dimensional hot stretch bending forming device with the segmented shape control and the temperature control as claimed in claim 1, which is characterized in that: the base (1) is L-shaped, a plurality of T-shaped grooves are formed in the longitudinal direction, and the hydraulic oil cylinder (5) is installed on the base (1) and the hydraulic oil cylinder support (4).
4. The three-dimensional hot stretch bending forming device with the segmented shape control and the temperature control as claimed in claim 1, which is characterized in that: the segmented insulation can (2) is a box body, and a thermocouple (14) and a resistance wire (15) are arranged in the segmented insulation can and used for temperature measurement and heating; the wall surface of the segmented insulation can (2) adopts a structure of an insulation layer and a metal shell, wherein the insulation layer adopts a mullite fiberboard, and the metal shell adopts heat-resistant stainless steel.
5. The three-dimensional hot stretch bending forming device with the segmented shape control and the temperature control as claimed in claim 1, which is characterized in that: the forming unit back plate (19) and the sliding block guide rail (22) are installed on the support (17) through bolts (18), the height limiting rod (20) and the height limiting cushion block (16) limit the displacement of the sliding block (26), the sliding block (26) is connected with the forming surface bottom plate (24) through a vertical pin shaft (23), the forming surface bottom plate (24) can rotate around the vertical pin shaft (23), the forming surface bottom plate (24) is connected with the forming surface (25) through a horizontal pin shaft (27), the forming surface (25) can rotate around the horizontal pin shaft (27), and the forming unit (3) can longitudinally slide along a T-shaped groove of the base (1).
6. The three-dimensional hot stretch bending forming device with the segmented shape control and the temperature control as claimed in claim 1, which is characterized in that: the temperature control cabinet (8) is of a cabinet type structure, a plurality of temperature display instruments are installed on a control panel, each temperature display instrument corresponds to a thermocouple (14) in different segmented heat preservation boxes (2), and the temperature in each segmented heat preservation box (2) can be read visually.
7. The three-dimensional hot stretch bending forming device with the segmented shape control and the temperature control as claimed in claim 1, which is characterized in that: the transformer (7) is a product customized according to requirements, the input end of the transformer is an alternating current power supply, and the output end of the transformer is a direct current power supply within a safe voltage.
8. The three-dimensional hot stretch bending forming device with the segmented shape control and the temperature control as claimed in claim 1, which is characterized in that: the section bar (13) is heated by self resistance, the transformer (7) supplies power to the section bar (13), and two ends of the section bar (13) are provided with insulating blocks (12) for isolating the section bar (13) from the clamp (11).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920491412.8U CN210023367U (en) | 2019-04-12 | 2019-04-12 | Three-dimensional hot stretch bending forming device capable of controlling shape and temperature in segmented mode |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920491412.8U CN210023367U (en) | 2019-04-12 | 2019-04-12 | Three-dimensional hot stretch bending forming device capable of controlling shape and temperature in segmented mode |
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| CN210023367U true CN210023367U (en) | 2020-02-07 |
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| CN201920491412.8U Expired - Fee Related CN210023367U (en) | 2019-04-12 | 2019-04-12 | Three-dimensional hot stretch bending forming device capable of controlling shape and temperature in segmented mode |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109821944A (en) * | 2019-04-12 | 2019-05-31 | 长春工业大学 | A kind of Three Dimensional Thermal stretch wrap forming device of segmentation control shape temperature control |
| CN111331014A (en) * | 2020-04-10 | 2020-06-26 | 西北工业大学 | Airplane section self-resistance electric heating incremental free bending forming clamp and forming method |
| CN112114601A (en) * | 2020-07-20 | 2020-12-22 | 南京弘图华智科技有限公司 | Self-resistance heating forming intelligent temperature detection control system and control method thereof |
| CN112474933A (en) * | 2021-01-06 | 2021-03-12 | 长春工业大学 | Three-dimensional hot stretch bending forming device based on multi-degree-of-freedom mold structure |
-
2019
- 2019-04-12 CN CN201920491412.8U patent/CN210023367U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109821944A (en) * | 2019-04-12 | 2019-05-31 | 长春工业大学 | A kind of Three Dimensional Thermal stretch wrap forming device of segmentation control shape temperature control |
| CN109821944B (en) * | 2019-04-12 | 2024-03-22 | 长春工业大学 | Three-dimensional hot stretch bending forming device with sectional shape control and temperature control |
| CN111331014A (en) * | 2020-04-10 | 2020-06-26 | 西北工业大学 | Airplane section self-resistance electric heating incremental free bending forming clamp and forming method |
| CN111331014B (en) * | 2020-04-10 | 2021-11-30 | 西北工业大学 | Airplane section self-resistance electric heating incremental free bending forming clamp and forming method |
| CN112114601A (en) * | 2020-07-20 | 2020-12-22 | 南京弘图华智科技有限公司 | Self-resistance heating forming intelligent temperature detection control system and control method thereof |
| CN112474933A (en) * | 2021-01-06 | 2021-03-12 | 长春工业大学 | Three-dimensional hot stretch bending forming device based on multi-degree-of-freedom mold structure |
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Granted publication date: 20200207 |