CN213856495U - High strength steel pipe bending die plug - Google Patents
High strength steel pipe bending die plug Download PDFInfo
- Publication number
- CN213856495U CN213856495U CN202022404617.3U CN202022404617U CN213856495U CN 213856495 U CN213856495 U CN 213856495U CN 202022404617 U CN202022404617 U CN 202022404617U CN 213856495 U CN213856495 U CN 213856495U
- Authority
- CN
- China
- Prior art keywords
- steel pipe
- core rod
- plug
- strength steel
- mandrel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D9/00—Bending tubes using mandrels or the like
- B21D9/04—Bending tubes using mandrels or the like the mandrel being rigid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D9/00—Bending tubes using mandrels or the like
- B21D9/05—Bending tubes using mandrels or the like co-operating with forming members
- B21D9/07—Bending tubes using mandrels or the like co-operating with forming members with one or more swinging forming members engaging tube ends only
Abstract
The utility model provides a high strength steel pipe bending die plug, the mould plug is straight excellent formula plug, including plug pull rod and plug body, plug pull rod and plug body rear end spiro union, shown plug body cross sectional shape and steel pipe shape looks adaptation, plug body cross sectional size are less than the steel pipe internal diameter, and the plug body is when the steel pipe, and the unilateral clearance of plug body and steel pipe wall is d, and 0 < d is less than or equal to 0.5 mm. The utility model discloses a high-strength steel pipe bending mould core rod is an integrated rod-shaped core rod, which solves the problem that when a traditional movable joint core rod bends a high-strength material, the material is easy to be sunk and blocked at a movable joint; the design size of the straight-bar type core rod is specially designed, and meanwhile, the position of the front end of the core rod body contacting the inner wall of the R corner outside the steel pipe is designed into a rounded R corner, so that the deformation of the R corner outside the steel pipe caused by a sharp point of a right angle can be avoided; the high-strength steel pipe can reduce the sinking problem in the bent pipe, and the production cost is low.
Description
Technical Field
The utility model relates to a high strength steel pipe processing technology field, concretely relates to high strength steel pipe bending die plug.
Background
The steel pipe is easy to cause the depression of the bent pipe when being bent, and the existing pipe bending die mostly uses the movable joint core rod as the in-pipe support in order to solve the depression problem, and each section is evenly distributed in the steel pipe, however, the strength of the high-strength steel pipe with the strength exceeding 600MPa is higher, if the movable joint core rod is easy to be clamped in the pipe, the production efficiency is affected, the abrasion of the core rod is too large if the movable joint core rod is used, and the movable joint is broken in the pipe to stop production if the movable joint core rod is serious.
SUMMERY OF THE UTILITY MODEL
To the technical problem, the utility model provides a high strength steel pipe bending die plug can improve the sunken of return bend department to avoided the card to influence production efficiency in the pipe.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a high strength steel pipe bending die plug, the die plug is straight stick formula plug, includes plug pull rod and plug body, plug pull rod and plug body rear end spiro union, plug body cross sectional shape and steel pipe shape looks adaptation, plug body cross sectional size is less than the steel pipe internal diameter, and when the plug body was in the steel pipe, the unilateral clearance of plug body and steel pipe wall was d, and d is more than 0 and is less than or equal to 0.5 mm.
Furthermore, a groove for accommodating the steel pipe burrs is arranged on one side, close to the steel pipe burrs, of the mandrel body.
Furthermore, the edges of the end face of the mandrel body close to the bent part of the steel pipe are rounded R-shaped angles.
Further, all edges of the core rod body are rounded R angles.
The utility model discloses a high strength steel pipe bending die plug changes original movable joint plug into straight excellent formula plug, and the plug section corresponds with the steel pipe shape, and the plug size must be less than the steel pipe internal diameter, but unilateral clearance can not be greater than 0.5mm, and wherein the return bend inboard is steel pipe burr side, and straight excellent formula plug must dodge the design at this position, and straight excellent formula plug corresponds and is equipped with the recess in burr position department to avoid plug extrusion burr position.
In the pipe bending process, the straight rod type core rod penetrates through the steel pipe, the straight rod type core rod is tightly attached to the inner wall of the pipe in the pipe bending process, and the straight rod type core rod can provide a supporting effect in the pipe bending process, so that the problem of sinking of the bent pipe is reduced; the core rod body penetrates through the inside of the steel pipe, and when the pipe is bent, the inner diameter of the core rod body is only slightly smaller than that of the steel pipe, so that the core rod body only needs one end to be fixedly connected with the core rod pull rod, and the other end of the core rod body can be in contact with the bent pipe without being particularly fixed.
The utility model discloses a high strength steel pipe bending die plug has not only carried out special design to the design size of straight rod formula plug, and the position design that contacts the outer R angle inner wall of steel pipe simultaneously at the front end of plug body is the mellow and full R angle, can avoid the right angled sharp-pointed point to cause the outer R angle department of steel pipe to warp.
The utility model aims at the problem that the high-strength steel pipe is supported to reduce the sinking during the pipe bending, on one hand, the mandrel of the utility model has low production cost, only needs a section of Cr12MoV die steel material to be processed in a micro-scale manner, and is assembled after being processed in a multi-section manner compared with the prior movable core-cutting ball copper material, thereby not only saving the material cost, but also having much lower processing cost; more importantly, the product can be stably produced in large quantity without the risk that the core rod is broken and clamped in the pipe; on the other hand, the utility model discloses a plug is based on not letting the plug still distribute in the product pipe behind the return bend, avoids sunken every section of movable joint plug ball's the integral type stick type plug that the consideration was proposed of forcing, has solved traditional movable joint plug when high strength material return bend, and easy material is sunken to be blocked in the problem of movable joint department.
Drawings
Fig. 1 is a schematic view of a mandrel structure according to the present invention;
FIG. 2 is a diagram showing a use state of a high strength steel pipe bending mold mandrel according to embodiment 1 of the present invention;
FIG. 3 is a diagram showing the state that the mandrel of the high-strength steel pipe bending die according to embodiment 1 of the present invention is sleeved in the high-strength steel pipe;
FIG. 4 is an internal cross-sectional view of a mandrel of a high-strength steel pipe bending mold according to embodiment 1 of the present invention when the mandrel is inserted into a high-strength steel pipe;
fig. 5 is a cross-sectional view of the mandrel of the high-strength steel pipe bending die according to embodiment 1 of the present invention when the mandrel is inserted into the high-strength steel pipe.
The steel core rod comprises a core rod body 1, a wheel mold 2, a clamping mold 3, a core rod pull rod 4, a steel pipe 5 and a groove 6.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 to 5, the high-strength steel pipe bending die mandrel is a straight-bar type mandrel, and comprises a mandrel pull rod 4 and a mandrel body 1, wherein the mandrel pull rod 4 is in threaded connection with the rear end of the mandrel body 1, the cross section of the mandrel body 1 is rectangular and is matched with the shape of a steel pipe, the size of the cross section of the mandrel body 1 is smaller than the inner diameter of the steel pipe 5, and when the mandrel body 1 is in the steel pipe, the unilateral gap between the mandrel body 1 and the wall of the steel pipe 5 is 0.3 mm; a groove 6 for accommodating the burrs of the steel pipe 5 is formed in one side, close to the burrs of the steel pipe 5, of the mandrel body 1; the front edge and the rear edge of the front end of the mandrel body 1 are rounded R angles, as shown in an area A of fig. 4; furthermore, all edges of the core rod body are rounded R angles.
As shown in figure 3, the wheel mold 2 and the clamping mold 3 clamp and drive the steel pipe 5 in the pipe bending process, and the straight rod type core rod shown in figure 4 penetrates through the steel pipe 5 to support the inner wall of the pipe bending position of the steel pipe 5 in the pipe bending process, so that the pipe bending position is not sunken.
Those of ordinary skill in the art will understand that: the above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. The high-strength steel pipe bending die core rod is characterized in that the die core rod is a straight rod type core rod and comprises a core rod pull rod and a core rod body, the core rod pull rod is in threaded connection with the rear end of the core rod body, the shape of the cross section of the core rod body is matched with that of a steel pipe, the size of the cross section of the core rod body is smaller than the inner diameter of the steel pipe, when the core rod body is arranged in the steel pipe, the unilateral clearance between the core rod body and the wall of the steel pipe is d, and d is larger than 0 and smaller than or equal to 0.5 mm.
2. The high-strength steel pipe bending die mandrel as claimed in claim 1, wherein a groove for accommodating the steel pipe burrs is formed on one side of the mandrel body, which is close to the steel pipe burrs.
3. The high-strength steel pipe bending die mandrel as claimed in claim 1, wherein edges of the end surface of the mandrel body close to the bend of the steel pipe are rounded R-shaped angles.
4. The high-strength steel pipe bending die mandrel according to claim 1, wherein all edges of the mandrel body are rounded R angles.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022404617.3U CN213856495U (en) | 2020-10-26 | 2020-10-26 | High strength steel pipe bending die plug |
| PCT/CN2020/138259 WO2022088448A1 (en) | 2020-10-26 | 2020-12-22 | High-strength steel tube bending die mandrel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022404617.3U CN213856495U (en) | 2020-10-26 | 2020-10-26 | High strength steel pipe bending die plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213856495U true CN213856495U (en) | 2021-08-03 |
Family
ID=77074595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022404617.3U Active CN213856495U (en) | 2020-10-26 | 2020-10-26 | High strength steel pipe bending die plug |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN213856495U (en) |
| WO (1) | WO2022088448A1 (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3238264A1 (en) * | 1982-10-15 | 1984-04-19 | Rigobert Dipl.-Ing. 5000 Köln Schwarze | PIPE BENDING MACHINE WITH BENDING PIN |
| JP3676871B2 (en) * | 1995-12-08 | 2005-07-27 | 三恵技研工業株式会社 | Hollow double pipe bending machine |
| DE10338187A1 (en) * | 2003-08-12 | 2005-03-17 | Palima W.Ludwig & Co. | Method and device for bending and forming profiles by means of rolling or die bending |
| CN201470735U (en) * | 2009-08-06 | 2010-05-19 | 戚墅堰机车车辆厂工业公司 | Mould for bending steel pipe |
| CN102049436B (en) * | 2010-11-11 | 2012-07-25 | 西北工业大学 | Method for determining diameter and lead of mandrel for NC (numerical control) bending of thick-wall pipe |
| CN203541265U (en) * | 2013-09-13 | 2014-04-16 | 天津市海晟易铭科技有限公司 | Bending die of rectangular tubes |
-
2020
- 2020-10-26 CN CN202022404617.3U patent/CN213856495U/en active Active
- 2020-12-22 WO PCT/CN2020/138259 patent/WO2022088448A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022088448A1 (en) | 2022-05-05 |
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| GR01 | Patent grant |