CN216656040U - High-strength aluminum alloy forked profile hot roll bending forming die - Google Patents
High-strength aluminum alloy forked profile hot roll bending forming die Download PDFInfo
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- CN216656040U CN216656040U CN202122715495.4U CN202122715495U CN216656040U CN 216656040 U CN216656040 U CN 216656040U CN 202122715495 U CN202122715495 U CN 202122715495U CN 216656040 U CN216656040 U CN 216656040U
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Abstract
The utility model provides a high-strength aluminum alloy forked profile hot roll bending forming die which comprises a roller die set and a platform bottom plate, wherein the roller die set comprises a plurality of groups of roller dies, the plurality of groups of roller dies are arranged on the platform bottom plate at equal intervals along the same circular arc, and the central angle between every two adjacent groups of roller dies is 6.25 degrees; the roller die comprises a left pressing cover, a right pressing cover, an upper bottom plate, a lower bottom plate, a side plate, a left roller shaft, a right roller, a left roller and a right roller, wherein the left roller comprises an upper short round table and a lower long round table; the cross-sectional dimension of the right roller gradually increases from top to bottom. The utility model is suitable for forming the fork-shaped profile, has the springback compensation effect and has small profile distortion.
Description
Technical Field
The utility model belongs to the technical field of die manufacturing, and particularly relates to a high-strength aluminum alloy forked profile hot roll bending forming die.
Background
The high-strength aluminum alloy section is widely applied to the field of aerospace due to high specific strength, wherein the forked section is mainly used for a fuel storage tank of a carrier rocket, is an important part for connecting a cylinder section and a short shell of the fuel storage tank, and the forming precision of the forked section seriously influences the assembly precision of the fuel storage tank. The fork-shaped profile is generally machined into a circular ring, i.e. a fork-shaped ring. In order to bend the high-strength aluminum alloy fork-shaped section bar to a specified circular arc, a bending forming die is required. Meanwhile, in order to reduce the deformation resistance during bending, the mold is required to preferably perform hot bending forming.
At present, the existing bending forming die has the following problems: the profiles are mostly simpler profiles, the aimed profiles are also profiles with simple section shapes such as I-shaped steel, angle steel and the like, and no bending forming die for fork-shaped profiles exists; the distortion of the section during the bending process of the section is not considered; without a certain springback compensation mechanism, the hot bending forming is not convenient to realize.
Disclosure of Invention
In view of the above, the utility model aims to provide a high-strength aluminum alloy forked profile hot roll bending forming die, which is suitable for forming forked profiles, has the advantages of resilience compensation, small profile distortion and convenience in hot bending forming.
In order to achieve the purpose, the technical scheme of the utility model is realized as follows:
a hot roll bending forming die for high-strength aluminum alloy forked profiles comprises a roller die set and a platform bottom plate, wherein the roller die set comprises at least five groups of roller dies, the at least five groups of roller dies are arranged on the platform bottom plate at equal intervals along the same circular arc, and the central angle between every two adjacent groups of roller dies is 6.25 degrees;
the roller mold comprises a left gland, a right gland, an upper bottom plate, side plates, a lower bottom plate, a left roller shaft, a left roller, a right roller shaft and a right roller, wherein the upper bottom plate and the lower bottom plate are arranged in parallel, the left end and the right end of the upper bottom plate are respectively fixedly connected with the lower bottom plate through the side plates, the left end and the right end of the lower bottom plate are both connected with a platform bottom plate, the left roller shaft and the right roller shaft are arranged between the upper bottom plate and the lower bottom plate in parallel, the left roller comprises an upper short round platform and a lower long round platform which are coaxially arranged and integrally formed, the central axes of the upper short round platform and the lower long round platform are hollow, the right roller is of a hollow structure, the left roller is sleeved on the left roller shaft, the right roller is sleeved on the right shaft, a left bearing is arranged between the left roller and the left roller shaft, and a right bearing is arranged between the right roller and the right roller shaft, a space for accommodating a forked profile to be subjected to roll bending is formed between the left roller and the right roller, the space is matched with the profile of the forked profile to be subjected to roll bending, the left gland and the right gland are fixedly connected with the upper bottom plate, the left gland positions a left roller shaft through a compression left bearing, and the right gland positions a right roller shaft through a compression right bearing;
the size of the upper end face of the upper short circular truncated cone of the left roller is larger than that of the lower end face of the upper short circular truncated cone, the size of the upper end face of the lower long circular truncated cone is smaller than that of the lower end face of the upper short circular truncated cone, and the size of the lower end face of the lower long circular truncated cone is smaller than that of the upper end face of the lower long circular truncated cone; the cross section of the right roller is gradually increased from top to bottom;
the bus of the upper molded surface of the left roller is an upper bus of a standard molded surface which is jointed with the outer molded surface of the forked shaped profile to be rolled and bent around a deflection center O1Clockwise by 1.5 degrees, the generatrix of the lower profile of the left roller is formed by a forked profile to be rolledThe outer profile of the standard profile is fitted around the deflection center O2Clockwise deflection 1.5 °; the generatrix of the profile of the right roller is a generatrix of a standard profile which is jointed with the inner profile of the forked profile to be rolled and bent around a deflection center O3Is deflected clockwise by 1.5 degrees,
center of deflection O1Is the intersection point of the left vertical line and the middle horizontal line of the cross section of the forked profile, and the deflection center O2Is the intersection point of the left oblique line of the cross section of the forked section bar and the horizontal line in the middle part; the deflection center O3Is the intersection point of the extension line of the middle horizontal line of the cross section of the forked profile and the right curve.
Further, the forked section to be subjected to roll bending forms an arc with the radius of an arc outer contour line of 1675mm after being subjected to roll bending by a die.
Further, the platform bottom plate is the circular arc platform, and the radius of circular arc platform is 1675mm, and the arc length of circular arc platform is greater than the arc length of roller mould group component circular arc.
Furthermore, the roller molds are arranged in seven groups, the radius of the arc where the seven groups of roller molds are located is 1100-1700mm, and the arc length of the arc formed by the seven groups of roller molds is 1000-1200 mm.
Furthermore, two long round holes are formed in two ends of each lower bottom plate, and the first connecting bolt penetrates through the long round holes in the lower bottom plates to be connected with the threaded holes in the platform bottom plates.
Furthermore, the left gland and the right gland are respectively fixed on the upper base plate through a plurality of second connecting bolts.
Further, the electric cylinder pushes the forked section bar to be rolled to sequentially pass through seven groups of roller dies in the forming die, and an induction heating coil is arranged 120mm in front of the first group of roller dies.
Compared with the prior art, the high-strength aluminum alloy forked profile hot roll bending forming die has the following advantages:
the profiles of the left roller and the right roller are designed according to the profile of the fork-shaped profile, so that the problem of applicability of the fork-shaped profile is solved; the molded surfaces of the left roller and the right roller deflect 1.5 degrees, play a certain compensation role in the springback of the molded surface direction of the profile, and solve the problem of the distortion of the molded surface in the bending process; the seven groups of roller dies are matched and connected with the threaded holes of the platform bottom plate through the oblong holes in the lower bottom plate, so that the roller dies can respectively move along the radial direction, the bending radius can be adjusted, and the problem of resilience of the section in the bending plane direction is solved; the bending forming die adopts a push bending forming principle, and can conveniently arrange an induction heating coil in front of the first group of roller dies, so that the hot roller bending forming of the high-strength aluminum alloy section is realized, and the problem of the hot bending forming of the section is solved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:
fig. 1 is a schematic perspective view of a high-strength aluminum alloy forked profile hot roll bending forming die according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of one set of roller dies therein;
FIG. 3 is a cross-sectional view of a high strength aluminum alloy fork-shaped profile to which the present invention is applied;
FIG. 4 is a schematic view of the left and right rollers having a standard profile conforming to the outer profile of the forked profile to be rolled;
FIG. 5 is a schematic view of the deflection of the profiles of the left and right rolls, wherein the dotted line is a standard profile which is conformed to the inner profile of the forked profile to be rolled; the solid lines are the profiles of the left and right rollers of the present application;
FIG. 6 is a profile view of the left and right rollers of the present application;
fig. 7 is a schematic structural diagram of hot roll bending forming of the high-strength aluminum alloy forked profile by using the high-strength aluminum alloy forked profile hot roll bending forming die according to the embodiment of the utility model.
Description of reference numerals:
1. a platform floor; 2. a roller die set; 3. a first connecting bolt; 4. a left gland; 5. a right gland; 6. an upper base plate; 7. a second connecting bolt; 8. a side plate; 9. a right roller; 10. a lower base plate; 11. a right roller shaft; 12. a right bearing; 13. a left roller shaft; 14. a left bearing; 15. a left roller; 16. a forked section to be rolled; 17. an induction heating coil.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The high-strength aluminum alloy in the present application refers to an aluminum alloy with relatively high yield strength and tensile strength, and the tensile strength is generally greater than 480MPa, and the high-strength aluminum alloy in the specific example is a 2195 aluminum lithium alloy, and after aging treatment, the yield strength is about 410MPa, and the tensile strength is about 500 MPa.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1-6, a high-strength aluminum alloy forked profile hot roll bending forming die comprises a roller die set 2 and a platform bottom plate 1, wherein the roller die set 2 comprises at least five groups of roller dies, the at least five groups of roller dies are arranged on the platform bottom plate 1 at equal intervals along the same circular arc, and the central angle between two adjacent groups of roller dies is 6.25 degrees;
the roller die comprises a left gland 4, a right gland 5, an upper base plate 6, side plates 8, a lower base plate 10, a left roller shaft 13, a left roller 15, a right roller shaft 11 and a right roller 9, wherein the upper base plate 6 and the lower base plate 10 are arranged in parallel, the left end and the right end of the upper base plate 6 are fixedly connected with the lower base plate 10 through the side plates 8 respectively, the left end and the right end of the lower base plate 10 are connected with a platform base plate 1, the left roller shaft 13 and the right roller 9 shaft are arranged between the upper base plate 6 and the lower base plate 10 in parallel, the left roller 15 comprises an upper short circular table and a lower long circular table which are coaxially arranged and integrally formed, the central axes of the upper short circular table and the lower long circular table are hollow, the right roller 9 is of a hollow structure, the left roller 15 is sleeved on the left roller shaft 13, the right roller 9 is sleeved on the roller shaft 11, and a left bearing 14 is arranged between the left roller 15 and the left roller shaft 13, a right bearing 12 is arranged between the right roller 9 and the right roller shaft 13, a space for accommodating a fork-shaped profile 16 to be rolled is formed between the left roller 15 and the right roller 9, the space is matched with the profile of the fork-shaped profile to be rolled, the left gland 4 and the right gland 5 are both fixedly connected with the upper bottom plate 6, the left gland 4 positions the left roller shaft 13 through pressing the left bearing 14, and the right gland 5 positions the right roller shaft 11 through pressing the right bearing 12;
the size of the upper end surface of the upper short circular truncated cone of the left roller 15 is larger than that of the lower end surface of the upper short circular truncated cone, the size of the upper end surface of the lower long circular truncated cone is smaller than that of the lower end surface of the upper short circular truncated cone, and the size of the lower end surface of the lower long circular truncated cone is smaller than that of the upper end surface of the lower long circular truncated cone; the cross-sectional dimension of the right roller 9 gradually increases from top to bottom;
the generatrix of the upper part of the left roller 15 is the upper generatrix of the standard moulding surface which is jointed with the outer surface of the forked section bar to be rolled1Clockwise deflecting 1.5 degrees, the generatrix of the lower profile of the left roller 15 is a generatrix of a standard profile which is jointed with the outer profile of the forked profile to be rolled and bent around a deflection center O2Clockwise deflection 1.5 °; the generatrix of the profile of the right roller 9 is a generatrix of a standard profile which is jointed with the inner profile of the forked profile to be rolled and bent around a deflection center O3Is deflected clockwise by 1.5 degrees,
center of deflection O1Is the intersection point of the left vertical line and the middle horizontal line of the cross section of the forked profile, and the deflection center O2Is the intersection point of the left oblique line of the cross section of the forked section bar and the horizontal line in the middle part; the deflection center O3Is the intersection point of the extension line of the middle horizontal line of the cross section of the forked profile and the right curve.
The length of the forked section bar 16 to be subjected to roll bending is 1100mm, and the forked section bar 16 to be subjected to roll bending forms an arc with the radius of an arc outline line of 1675mm after being subjected to roll bending by a die. Platform bottom plate 1 is the circular arc platform, and the radius of circular arc platform is 1675mm, and the arc length of circular arc platform is greater than the arc length that roller die set 2 constitutes the circular arc. The roller molds are arranged into seven groups, the radius of the arc where the seven groups of roller molds are located is 1400mm, and the arc length of the arc formed by the seven groups of roller molds is 1000-1200 mm.
Two long round holes are formed in the two ends of each lower bottom plate 10, and the first connecting bolts 3 penetrate through the long round holes in the lower bottom plates 10 to be connected with threaded holes in the platform bottom plate 1. The left gland 4 and the right gland 5 are respectively fixed on the upper bottom plate 6 through a plurality of second connecting bolts 7.
The electric cylinder pushes the forked profile 16 to be rolled to pass through seven groups of roller dies in the forming die in sequence, and an induction heating coil 17 is arranged 120mm in front of the first group of roller dies.
FIG. 4 is a schematic view of the left and right rollers having a standard profile conforming to the outer profile of the forked profile to be rolled;
FIG. 5 is a schematic view of the deflection of the profiles of the left and right rolls, wherein the dotted line is a standard profile which is conformed to the inner profile of the forked profile to be rolled; the solid lines are the profiles of the left and right rollers of the present application; FIG. 6 is a profile view of the left and right rollers of the present application;
in the figure O1Dots, O2Dot and O3The points are all deflection centers, wherein the deflection center O1Is the intersection point of the left vertical line and the middle horizontal line of the cross section of the forked profile, and the deflection center O2The cross section of the forked section bar is the intersection point of a left oblique line and a middle horizontal line; the deflection center O3The cross section of the forked section bar is the intersection point of the extension line of the middle horizontal line and the right side curve;
the deflection correction of the interface between the upper structure and the lower structure of the left roller with standard profile is not carried out, the generatrix of the upper profile of the left roller 15 is the upper generatrix of the standard profile which is jointed with the outer profile of the forked profile to be rolled and bent around the deflection center O1The clockwise deflection is 1.5 degrees, the generatrix of the lower profile of the left roller 15 is a generatrix of a standard profile which is jointed with the outer profile of the forked profile to be rolled and bent around a deflection center O2Clockwise deflection 1.5 °; the generatrix of the profile of the right roller 9 is a generatrix of a standard profile which is jointed with the inner profile of the forked profile to be rolled and bent around a deflection center O3Clockwise deflection 1.5 °; the profiles of the left and right rollers thus formed are realized during the hot-roll bending forming processThe compensation is kick-backed to the section bar profile and the compensation is kick-backed to the crooked plane, and the mould of this application can reduce these two directions because of the error that kick-backs and produce, finally realizes the curved accurate shaping of hot-rolling of high-strength aluminum alloy forked section bar.
The bending radius and the section shape precision of a formed part are detected through the fork-shaped section bent by the hot roller bending forming die, and as a result, the bending radius is 1725mm, the difference between the bending radius and a target value of 1675mm is 50mm, the error rate of the bending radius is 3%, the error is small, the fit degree of the section shape and a sample plate is good, the section shape is fit with the sample plate, the maximum gap is less than 1mm, the error of the section shape is small, and the precision requirement is basically met.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. The utility model provides a high-strength aluminum alloy forked type section bar hot roll bending forming die which characterized in that: the roller die set (2) comprises at least five groups of roller dies, the at least five groups of roller dies are arranged on the platform bottom plate (1) at equal intervals along the same circular arc, and the central angle between every two adjacent groups of roller dies is 6.25 degrees;
the roller mold comprises a left gland (4), a right gland (5), an upper base plate (6), side plates (8), a lower base plate (10), a left roller shaft (13), a left roller (15), a right roller shaft (11) and a right roller (9), wherein the upper base plate (6) and the lower base plate (10) are arranged in parallel, the left end and the right end of the upper base plate (6) are fixedly connected with the lower base plate (10) through the side plates (8), the left end and the right end of the lower base plate (10) are connected with a platform base plate (1), the left roller shaft (13) and the right roller shaft (11) are arranged between the upper base plate (6) and the lower base plate (10) in parallel, the left roller (15) comprises an upper short circular table and a lower long circular table which are coaxially arranged and integrally formed, the central axes of the upper short circular table and the lower long circular table are hollow, the right roller (9) is of a hollow structure of a revolving body, the left roller (15) is sleeved on a left roller shaft (13), the right roller (9) is sleeved on a right roller shaft (11), a left bearing (14) is arranged between the left roller (15) and the left roller shaft (13), a right bearing (12) is arranged between the right roller (9) and the right roller shaft (11), a space for accommodating a fork-shaped profile (16) to be subjected to roll bending is formed between the left roller (15) and the right roller (9), the space is adapted to the profile of the fork-shaped profile to be subjected to roll bending, the left gland (4) and the right gland (5) are fixedly connected with the upper base plate (6), the left roller shaft (13) is positioned by compressing the left bearing (14) through the left gland (4), and the right roller shaft (11) is positioned by the right gland (5) through the right bearing (12);
the size of the upper end surface of an upper short circular truncated cone of the left roller (15) is larger than that of the lower end surface of the upper short circular truncated cone, the size of the upper end surface of a lower long circular truncated cone is smaller than that of the lower end surface of the upper short circular truncated cone, and the size of the lower end surface of the lower long circular truncated cone is smaller than that of the upper end surface of the lower long circular truncated cone; the cross section size of the right roller (9) is gradually increased from top to bottom;
the bus of the upper part profile of the left roller (15) is an upper bus of a standard profile which is jointed with the outer profile of the forked profile to be rolled1Clockwise deflects 1.5 degrees, the generatrix of the lower profile of the left roller (15) is a generatrix of a standard profile which is jointed with the outer profile of the forked profile to be rolled and bent around a deflection center O2Clockwise deflection 1.5 °; the generatrix of the profile of the right roller (9) is a generatrix of a standard profile which is jointed with the inner profile of the forked profile to be rolled and bent around a deflection center O3Is deflected clockwise by 1.5 degrees,
center of deflection O1Is the intersection point of the left vertical line and the middle horizontal line of the cross section of the forked profile, and the deflection center O2The cross section of the forked section bar is the intersection point of a left oblique line and a middle horizontal line; the deflection center O3Is the intersection point of the extension line of the middle horizontal line of the cross section of the forked profile and the right curve.
2. The high-strength aluminum alloy forked profile hot roll bending forming die as claimed in claim 1, wherein: the forked section (16) to be rolled forms an arc with the radius of an arc outline line of 1675mm after being rolled by a die.
3. The high-strength aluminum alloy forked profile hot roll bending forming die as claimed in claim 2, wherein: platform bottom plate (1) is the circular arc platform, and the radius of circular arc platform is 1675mm, and the arc length of circular arc platform is greater than the arc length that roller die set (2) constitute the circular arc.
4. The high-strength aluminum alloy forked profile hot roll bending forming die as claimed in claim 3, wherein: the roller molds are arranged in seven groups, the radius of the arc where the seven groups of roller molds are located is 1100-1200 mm, and the arc length of the arc formed by the seven groups of roller molds is 1000-1200 mm.
5. The high-strength aluminum alloy forked profile hot roll bending forming die as claimed in claim 1, wherein: two long round holes are formed in two ends of each lower bottom plate (10), and the first connecting bolt (3) penetrates through the long round holes in the lower bottom plates (10) to be connected with the threaded holes in the platform bottom plates (1).
6. The high-strength aluminum alloy forked profile hot roll bending forming die as claimed in claim 1, wherein: the left gland (4) and the right gland (5) are respectively fixed on the upper bottom plate (6) through a plurality of second connecting bolts (7).
7. The high-strength aluminum alloy forked profile hot roll bending forming die as claimed in claim 4, wherein: the electric cylinder pushes the forked section bar (16) to be rolled to sequentially pass through seven groups of roller dies in the forming die, and an induction heating coil (17) is arranged 120mm in front of the first group of roller dies.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122715495.4U CN216656040U (en) | 2021-11-08 | 2021-11-08 | High-strength aluminum alloy forked profile hot roll bending forming die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122715495.4U CN216656040U (en) | 2021-11-08 | 2021-11-08 | High-strength aluminum alloy forked profile hot roll bending forming die |
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| Publication Number | Publication Date |
|---|---|
| CN216656040U true CN216656040U (en) | 2022-06-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122715495.4U Active CN216656040U (en) | 2021-11-08 | 2021-11-08 | High-strength aluminum alloy forked profile hot roll bending forming die |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216656040U (en) |
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2021
- 2021-11-08 CN CN202122715495.4U patent/CN216656040U/en active Active
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