CN203679023U - Lower die of steel plate pre-bending machine - Google Patents
Lower die of steel plate pre-bending machine Download PDFInfo
- Publication number
- CN203679023U CN203679023U CN201320795055.7U CN201320795055U CN203679023U CN 203679023 U CN203679023 U CN 203679023U CN 201320795055 U CN201320795055 U CN 201320795055U CN 203679023 U CN203679023 U CN 203679023U
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- China
- Prior art keywords
- lower die
- steel plate
- bending machine
- chamfer
- bed die
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- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
The utility model particularly relates to a lower die of a steel plate pre-bending machine for pre-bending steel pipes with large-diameter wall thickness in the production line of longitudinal welded pipes. The lower die comprises a lower die body, wherein an outlet end, a pressing section, an inlet end and an involute profile are arranged on the lower die body; an arc transition curved surface is arranged on the inner side end face of the inlet end; a chamfer is arranged at the position, 400-500 mm away from the end opening, of the outlet end; the width of the chamfer is 100 mm, and the gradient of the chamfer is 5 degrees. According to the utility model, the technological requirements for processing are guaranteed, the situation that plate edges of steel plates are not pressed well in the aspect of arc size and cannot reach the technological requirements is avoided, and the situation that deformation is prevented at continuous operation positions and further the product quality is not influenced is guaranteed by virtue of the arc transition curved surface; a rational base circle radius is selected according to outer diameters of steel pipes of different specifications, so that the formation reliability is improved.
Description
Technical field
The utility model relates to tubulation industry field, is specifically related in a kind of straight welded pipe production line, major-diameter thick-wall steel pipe be carried out the steel plate pre-bending machine bed die of pre-bending.
Background technology
Steel plate pre-bending machine is the pre-bending operation of manufacturing specially industry design for ERW, is mainly used in the pre-bending before presed-steel plate.In the time of work, there is following problem in prebending machine mould in the past: one, the steel pipe of same outer diameter, and wall thickness doubles, and still need suppress on original equipment time, folds requirement because press power deficiency causes the radius of curvature of die forming curve can not meet steel pipe; Two, steel plate thickness increases, and when the performance of material changes, after steel formability, because of the impact of its bounce-back factor, if counterdie involute curve size is undesirable, edges of boards circular arc does not just reach the requirement of finished product caliber; Three, due to dependence experience, suppress not in placely, cause production tube to occur impression phenomenon.In view of above deficiency, need to improve pre-bending machine lower die tool and improve product quality and production efficiency.
Utility model content
The purpose of this utility model is to provide a kind of steel plate pre-bending machine bed die, to solve in prior art because press power deficiency makes the compacting of steel plate edges of boards arc size not in place, does not reach the problem of technological requirement.
For this reason, the utility model adopts following technical scheme: a kind of steel plate pre-bending machine bed die, comprise bed die body, on bed die body, be provided with the port of export, press section, entrance point, involute contour, described entrance point inner side end is provided with arc transition curved surface, and the port of export is provided with chamfering apart from port 400～500mm.
Further, the width of described chamfering is 100mm, and the gradient of described chamfering is 5 °.
Further, the curve base radius of described involute contour is 510mm.
The beneficial effects of the utility model are: the port of export at bed die body is provided with chamfering apart from port 400～500mm, reduce the length of press section, on identical device when moulding, wall thickness increasing is twice, in the situation that pressure is constant, guaranteed processing technology requirement, avoided because of press power deficiency make steel plate edges of boards arc size compacting not in place, do not reach technological requirement, through arc transition curved surface, guarantee that continuous station does not produce distortion and affects product quality; According to the outer diameter of steel pipes of different size, choose rational base radius, improve the reliability of moulding.
Accompanying drawing explanation
Fig. 1 is prior art structural representation;
Fig. 2 is the utility model structural representation.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 1, a kind of steel plate pre-bending machine bed die, comprise bed die body 1, on bed die body 1, be provided with the port of export 3, press section 7, entrance point 2, involute contour 5, entrance point 2 inner side ends are provided with arc transition curved surface 6, the port of export 3 is provided with chamfering 4 apart from port 500mm, and the width of chamfering 4 is 100mm, and the gradient of chamfering 4 is 5 °.
The curve base radius of involute contour 5 is 510mm, has improved the reliability of moulding.
Claims (3)
1. a steel plate pre-bending machine bed die, comprise bed die body, on bed die body, be provided with the port of export, press section, entrance point, involute contour, it is characterized in that: described entrance point (2) inner side end is provided with arc transition curved surface (6), and the port of export (3) is provided with chamfering (4) apart from port 400～500mm.
2. steel plate pre-bending machine bed die according to claim 1, is characterized in that: the width of described chamfering (4) is 100mm, and the gradient of described chamfering (4) is 5 °.
3. steel plate pre-bending machine bed die according to claim 1 and 2, is characterized in that: the curve base radius of described involute contour (5) is 510mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320795055.7U CN203679023U (en) | 2013-12-06 | 2013-12-06 | Lower die of steel plate pre-bending machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320795055.7U CN203679023U (en) | 2013-12-06 | 2013-12-06 | Lower die of steel plate pre-bending machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203679023U true CN203679023U (en) | 2014-07-02 |
Family
ID=51000983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320795055.7U Expired - Fee Related CN203679023U (en) | 2013-12-06 | 2013-12-06 | Lower die of steel plate pre-bending machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203679023U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115608820A (en) * | 2022-10-27 | 2023-01-17 | 番禺珠江钢管有限公司 | Steel plate pre-bending machine |
-
2013
- 2013-12-06 CN CN201320795055.7U patent/CN203679023U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140702 Termination date: 20151206 |
|
| EXPY | Termination of patent right or utility model |