CN202591379U - Pre-flanging machine die - Google Patents
Pre-flanging machine die Download PDFInfo
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- CN202591379U CN202591379U CN 201220116019 CN201220116019U CN202591379U CN 202591379 U CN202591379 U CN 202591379U CN 201220116019 CN201220116019 CN 201220116019 CN 201220116019 U CN201220116019 U CN 201220116019U CN 202591379 U CN202591379 U CN 202591379U
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Abstract
The utility model discloses a pre-flanging machine die, comprising an upper die and a lower die adapted with the upper die. The upper die and the lower die are respectively provided with an upper die forming face and a lower die forming face, which are mutually adapted; and the lower die comprises an inlet guide section and an outlet guide section, and a middle section. Furthermore, each one of the inlet guide section and the outlet guide section comprises a curve surface formed by a plurality of biquadratic curves along a length direction of the lower die; and the curve surface is tangent to the lower die forming face.
Description
Technical field
The utility model relates to a kind of mould, relates in particular to a kind of welded tube forming mould.
Background technology
At present; The heavy caliber straight-line joint submerged arc welding tube in the whole world about about 90% adopts UOE (U-forming; O-forming; Expanding) moulding process, it is to be raw material with the hot rolling steel plate, through pre-bending limit, U be shaped (U-forming), O is shaped (O-forming) and submerged arc welding pipe hole enlargement forming processes such as (Expanding) made a kind of technology of UOE.Vertically the pre-bending limit is to be bent with preparatory joggling machine in the steel plate marginal portion, to guarantee an important procedure of final welded tube welded seam area geometry and dimensional accuracy.
The UOE unit pre-bending limit stage is adopted the preparatory joggling machine of big stride mostly, and it adopts the step-by-step movement molding mode, and for example the effective active length of mould is 5.5m; Steel pipe length to be formed is 13m; Then need 3 moulding, preceding twice moulding length is 11m, and last moulding length is 2m.Owing in 3 forming processes 2 intermediate zones are arranged, in actual production process, the band steel is serious than other positions in the intermediate zone calendering, therefore can cause more serious wearing and tearing to follow-up O machine mould.Through analyzing, the bigger main cause of intermediate zone calendering is that irrational mould goes into, export the design of chamfering, thereby causes stress to concentrate, and the band steel rolls bigger, and then causes die wear serious.Yet, present existing mould its go into, the chamfering of export orientation section all is designed to the circular arc chamfering curved surface.
Publication number is CN101428319, and open day is on May 13rd, 2009, and the Chinese patent that name is called " a kind of pre-bend mould " discloses a kind of novel die molded lines, and the forming surface of this mould upper and lower mould is involute surface, and adaptive mutually.
Publication number is CN202006238U, and open day is on October 12nd, 2011, and the Chinese patent that name is called " joggling machine mould in advance " discloses a kind of novel die molded lines, and the cross section of the forming surface of this mould upper and lower mould is biquadratic curve.
Technique scheme is all to the main part of mould molding face, ignored that bed die is gone into, the curved surface optimization of export orientation section chamfering intermediate zone, thereby in actual forming process, has that counterdie intermediate zone local damage is serious, the bigger shortcoming of the local calendering of band steel.
Summary of the invention
The goal of the invention of the utility model provides a kind of preparatory joggling machine mould; This preparatory joggling machine mould has that a kind of rational counterdie is gone into, export orientation section chamfering curved surface; When being convenient to be with steel to nip and see off, make mould in forming process, along stressed more even on its length direction; Avoiding big and mould is caused damage, and effectively solve the bigger problem of the local calendering of band steel intermediate zone by local stress.
According to the foregoing invention purpose, the utility model provides a kind of preparatory joggling machine mould, comprise a mold and one and the adaptive bed die of this mold, mold and bed die have an adaptive each other patrix forming surface and mold forming face once respectively; Bed die comprises an inlet guide section and an export orientation section, and an interlude; In addition, inlet guide section and export orientation section comprise a curved surface that forms along some biquadratic curves of bed die length direction, and this curved surface and counterdie forming surface are tangent.
Preferably, in above-mentioned preparatory joggling machine mould, the equation of biquadratic curve is:
Some biquadratic curve is intersected in a straight line along the die width direction, and in the formula, Z is the coordinate on inlet guide section or the export orientation segment length direction; Y ' is the coordinate on inlet guide section or the export orientation section thickness direction; Y is the coordinate on the interlude thickness direction.
Alternatively, in above-mentioned preparatory joggling machine mould, the cross section of the counterdie forming surface of patrix forming surface and interlude is a biquadratic curve, and its equation is:
Y＝A-B
1+B
2X
2-B
3X
3+B
4X
4
In the formula, X is the coordinate on patrix or the interlude width; Y is the coordinate on patrix or the interlude thickness direction; A, B
1, B
2, B
3, B
4Coefficient for each time of equation item.
Alternatively, in above-mentioned preparatory joggling machine mould, the cross section of the counterdie forming surface of patrix forming surface and interlude is an involute.
Preferably, in above-mentioned preparatory joggling machine mould, bed die comprises an entrance and an outlet section, and the inlet guide section is located at the entrance area of entrance, and the export orientation section is located at the exit region of outlet section.
The described preparatory joggling machine mould of the utility model has that a kind of rational counterdie is gone into, export orientation section chamfering curved surface; When being convenient to be with steel to nip and see off; Make mould in forming process; Along stressed more even on its length direction, thereby avoid the peak stress between counterdie and the band steel, prolonged the service life of mould; And this preparatory joggling machine mould has also solved the bigger problem of the local calendering of band steel intermediate zone effectively, has controlled strip edge portion burr, has improved that mould is gone into, the Forming Quality of export orientation section, has reduced the damage to follow-up O forming mould.
Description of drawings
Fig. 1 is the structural representation of the described preparatory joggling machine mould of the utility model counterdie in one embodiment.
Fig. 2 is the structural representation of the described preparatory joggling machine mould of the utility model inlet guide section in one embodiment.
Fig. 3 be among Fig. 2 A to view.
Fig. 4 is the structural representation of the described preparatory joggling machine mould of the utility model inlet guide section in one embodiment.
Fig. 5 is the structural representation of the described preparatory joggling machine mould of the utility model export orientation section in one embodiment.
Fig. 6 is biquadratic curve curved surface and the cross section comparison diagram of existing circular arc chamfering on the described preparatory joggling machine mould of the utility model inlet guide section in one embodiment.
Fig. 7 is the described preparatory joggling machine mould of the utility model going in one embodiment, the biquadratic curve curved surface of export orientation section and the stressed distribution map of mould of cubic curve curved surface and circular arc chamfering.
The specific embodiment
To combine Figure of description and concrete embodiment that the described preparatory joggling machine mould of the utility model is done further detailed description below.
Fig. 1 has shown the structure of the described preparatory joggling machine mould of the utility model counterdie in the present embodiment.As shown in Figure 1, the counterdie length overall of joggling machine is 5700mm in advance, and it comprises that length is entrance and the outlet section of 2850mm, and entrance and outlet section respectively comprise the cope and drag pattern tool, and the left and right sides becomes symmetrical structure, and is middle through the contiguous block connection.The entrance area of entrance is inlet guide section 1, and the exit region of outlet section is an export orientation section 2, and all the other are interlude 3.Wherein, inlet guide section 1 length is 700mm, and export orientation section 2 length are 100mm, and interlude 3 (being effective active length) is long to be 4900mm.The cross section that patrix forms the counterdie forming surface 4 of face and interlude 3 can be the molded lines of biquadratic curve, involute or other types.In the present embodiment, the cross section that patrix forms the counterdie forming surface 4 of face and interlude 3 is a biquadratic curve, and its equation is:
Y＝A-B
1+B
2X
2-B
3X
3+B
4X
4 (1)
(1) in the formula, X is the coordinate on patrix or the interlude width; Y is the coordinate on said patrix or the interlude thickness direction; A, B
1, B
2, B
3, B
4Coefficient for each time of equation item.
Mold also comprises two patrix transition faces that are positioned at patrix forming surface both sides, also are connected with the transition of patrix forming surface respectively, and the cross section of patrix transition face is a straight line; Bed die also comprises two counterdie transition faces 5 that are positioned at counterdie forming surface 4 both sides, also are connected with 4 transition of counterdie forming surface respectively, and the cross section of counterdie transition face 5 is a straight line.
Fig. 2, Fig. 3, Fig. 4 have shown the structure of the described preparatory joggling machine mould of the utility model inlet guide section in the present embodiment.Like Fig. 2, Fig. 3, shown in Figure 4, the inlet guide section comprises the curved surface that forms along some biquadratic curve f1 of bed die length direction.This curved surface and counterdie forming surface 4 are tangent, and in a three-dimensional system of coordinate, the initial point O of this coordinate system is positioned on inlet guide section and the bed die inside edge, interlude junction; X axle, Y axle, Z axle are respectively width, thickness, the length direction of mould.Biquadratic curve f1 is in the YOZ coordinate system, and its equation is:
0≤Z≤700 (3)
(2) in the formula, Z is the coordinate on the inlet guide section length direction; Y ' is the coordinate on the inlet guide section thickness direction; Y is the coordinate on the interlude thickness direction.
Please continue to consult Fig. 2, Fig. 3, Fig. 4, bed die gross thickness H is 235mm; The height h of origin of coordinates O and bed die bottom surface is 115mm, itself and arrival end be 700mm apart from l, the guide section that promptly enters the mouth is 700mm apart from l.Each biquadratic curve f1 on the curved surface extends out to inlet guide section end, and is intersected in a straight line along the die width direction, and this straight line projection in the YOZ plane is a some P, and its height m is 35mm, with the distance L of initial point O be 1100mm.
Fig. 5 has shown the structure of the described preparatory joggling machine mould of the utility model export orientation section in the present embodiment.As shown in Figure 5; The counterdie forming surface of export orientation section is provided with basically and is provided with identical with the counterdie forming surface of inlet guide section; Its difference is that the curved surface of export orientation section is positioned on export orientation section and the bed die inside edge, interlude junction at an initial point O, and the height h of initial point O is 115mm; The length l of export orientation section ' be 100mm, therefore, the span of Z is:
0≤Z≤100 (4)
In addition, each the biquadratic curve f1 on the curved surface extends out to export orientation section end, and is intersected in a straight line along the die width direction, and this straight line projection in the YOZ plane is a some P ', and its height m is 35mm, with the distance L of initial point O be 1100mm.
Than the preparatory joggling machine mould of existing employing circular arc chamfering, the preparatory joggling machine mould in the present embodiment can effectively be avoided the peak stress between bed die and the band steel.Fig. 6 goes into in the present embodiment, the export orientation section is the biquadratic curve curved surface, the cross section comparison diagram of existing circular arc chamfering curved surface.As shown in Figure 6; It is the some P of 35mm that biquadratic curve f1 in same plane and circular curve f2 intersect at height m; The maximum curvature that the maximum curvature of biquadratic curve f1 changes less than circular curve f2 changes, thereby makes biquadratic curve f1 more level and smooth, and the stress that the band steel is produced is also comparatively soft.
Fig. 7 has shown, the export orientation section is the comparison of the stress distribution that respectively the band steel produced of the biquadratic curve curved surface that adopts of the described preparatory joggling machine mould of existing circular arc chamfering curved surface, cubic curve curved surface and present embodiment.The equation of cubic curve curved surface is among Fig. 7:
As shown in Figure 7; When go into, when the export orientation section adopts circular arc chamfering curved surface a; Go into, bigger peak stress (greater than 1300MPa) appears in export orientation section and interlude join domain (between 2100～2200mm), and is bigger to the mould concentrated wear, and it is bigger to cause being with steel local calendering to occur.When go into, the export orientation section adopts cubic curve curved surface b and during biquadratic curve curved surface c, its peak stress reduces (all less than 1300MPa) gradually.When go into, when the export orientation section adopts biquadratic curve curved surface c, along die length direction upper stress distribution uniform, almost unstressed peak value occurs, and reduces gently at mould ends stress.Therefore, the preparatory joggling machine mould in the present embodiment can improve the mould stress on the one hand, prolongs die life; Can improve calendering on the other hand, improve Forming Quality, also can avoid the damage that greatly follow-up O forming mould is brought because of calendering simultaneously.
Be noted that the above specific embodiment of enumerating that is merely the utility model, obviously the utility model is not limited to above embodiment, and many similar variations are arranged thereupon.If those skilled in the art from all distortion that the disclosed content of the utility model directly derives or associates, all should belong to the protection domain of the utility model.
Claims (5)
1. preparatory joggling machine mould comprises a mold and one and the adaptive bed die of this mold, and said mold and bed die have an adaptive each other patrix forming surface and mold forming face once respectively; Said bed die comprises an inlet guide section and an export orientation section, and an interlude; It is characterized in that said inlet guide section and export orientation section comprise a curved surface that forms along some biquadratic curves of bed die length direction, this curved surface and counterdie forming surface are tangent.
2. preparatory joggling machine mould as claimed in claim 1 is characterized in that the equation of said biquadratic curve is:
Said some biquadratic curves are intersected in a straight line along the die width direction, and in the formula, Z is the coordinate on said inlet guide section or the export orientation segment length direction; Y ' is the coordinate on inlet guide section or the export orientation section thickness direction; Y is the coordinate on the said interlude thickness direction.
3. preparatory joggling machine mould as claimed in claim 2 is characterized in that the cross section of the counterdie forming surface of said patrix forming surface and interlude is a biquadratic curve, and its equation is:
Y＝A-B
1+B
2X
2-B
3X
3+B
4X
4
In the formula, X is the coordinate on said patrix or the interlude width; Y is the coordinate on said patrix or the interlude thickness direction; A, B
1, B
2, B
3, B
4Coefficient for each time of equation item.
4. preparatory joggling machine mould as claimed in claim 2 is characterized in that the cross section of the counterdie forming surface of said patrix forming surface and interlude is an involute.
5. like claim 3 or 4 described preparatory joggling machine moulds, it is characterized in that said bed die comprises an entrance and an outlet section, said inlet guide section is located at the entrance area of entrance, and said export orientation section is located at the exit region of outlet section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220116019 CN202591379U (en) | 2012-03-23 | 2012-03-23 | Pre-flanging machine die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220116019 CN202591379U (en) | 2012-03-23 | 2012-03-23 | Pre-flanging machine die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202591379U true CN202591379U (en) | 2012-12-12 |
Family
ID=47308962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220116019 Expired - Lifetime CN202591379U (en) | 2012-03-23 | 2012-03-23 | Pre-flanging machine die |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202591379U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110961499A (en) * | 2018-09-28 | 2020-04-07 | 宝山钢铁股份有限公司 | Working surface molded line of U-shaped forming machine die and generation method thereof |
| WO2021248748A1 (en) * | 2020-06-08 | 2021-12-16 | 山东理工大学 | Variable-channel corner self-bending extrusion die, and design, manufacturing and extrusion method thereof |
| CN115608820A (en) * | 2022-10-27 | 2023-01-17 | 番禺珠江钢管有限公司 | Steel plate pre-bending machine |
-
2012
- 2012-03-23 CN CN 201220116019 patent/CN202591379U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110961499A (en) * | 2018-09-28 | 2020-04-07 | 宝山钢铁股份有限公司 | Working surface molded line of U-shaped forming machine die and generation method thereof |
| CN110961499B (en) * | 2018-09-28 | 2021-06-15 | 宝山钢铁股份有限公司 | Working surface molded line of U-shaped forming machine die and generation method thereof |
| WO2021248748A1 (en) * | 2020-06-08 | 2021-12-16 | 山东理工大学 | Variable-channel corner self-bending extrusion die, and design, manufacturing and extrusion method thereof |
| CN115608820A (en) * | 2022-10-27 | 2023-01-17 | 番禺珠江钢管有限公司 | Steel plate pre-bending machine |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121212 |
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| CX01 | Expiry of patent term |