CN218903373U - Expanding head for mechanical expanding machine of steel pipe - Google Patents
Expanding head for mechanical expanding machine of steel pipe Download PDFInfo
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- CN218903373U CN218903373U CN202223191255.XU CN202223191255U CN218903373U CN 218903373 U CN218903373 U CN 218903373U CN 202223191255 U CN202223191255 U CN 202223191255U CN 218903373 U CN218903373 U CN 218903373U
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Abstract
The utility model discloses a diameter expanding head for a mechanical steel pipe expander, which comprises a diameter expanding die and a pull rod connected with the mechanical steel pipe expander, wherein the diameter expanding die is arranged at the front end of the pull rod; the diameter-expanding die comprises a diameter-expanding module and a conical head, the conical head is arranged at the front end of the diameter-expanding module, a space for accommodating the conical head is arranged between the front end of the diameter-expanding module and the pull rod, and a sleeve fixedly connected with the pull rod is arranged at the rear end of the diameter-expanding module; the diameter expanding module is provided with a tubular shape with two ends open, the tubular inner wall is in a conical shape, the tubular outer wall is provided with a front section, a middle section and a rear section, the outer wall of the front section is arc-shaped, the outer wall of the middle section and the outer wall of the rear section are straight cylinders, the front end of the middle section is smoothly connected with the rear end of the front section, and the outer diameter of the front end of the front section is smaller than that of the middle section. According to the utility model, the arc-shaped section is arranged at the front end of the expanding module, and the middle section is smoothly connected with the front end, so that the bamboo joint phenomenon is well improved, the expanding capacity and the expanding efficiency are improved, and the specific pressure of the conical head and the expanding module is effectively increased.
Description
Technical Field
The utility model belongs to the field of pipeline manufacturing and processing, and particularly relates to a diameter expanding head for a mechanical steel pipe diameter expander.
Background
At present, the domestic mechanical expanding machine uses a pull rod to pull the conical head, and the expanding block die on the conical head realizes the effect of expanding the diameter of the steel pipe. Because the steel pipe is longer, and the expansion block mould is shorter, the expansion is needed to be carried out in multiple steps, in the actual step expansion, a transition area exists between the previous step and the next step, and a convex arc-shaped impression appears in the transition area, which is the bamboo joint phenomenon in the pipe manufacturing industry. Because the front end of the expanding head expanding die is relatively short, bamboo joints appear due to the overlapping of the expanding contact parts of the steel pipes, the appearance quality of products is directly affected by the structure, and the front part of the die is broken due to uneven stress of the end parts.
Disclosure of Invention
The utility model aims to solve the technical problem of providing the expanding head for the mechanical steel pipe expanding machine, which has reasonable design, improves the bamboo joint phenomenon and improves the expanding capacity and the expanding efficiency. The expanding head provided by the utility model eliminates the problem of ellipse and irregularity generated in the steel pipe forming and welding process. In order to achieve the above purpose, the present utility model adopts the following technical scheme:
the expanding head for the mechanical steel pipe expanding machine is characterized by comprising an expanding die and a pull rod connected with the mechanical steel pipe expanding machine, wherein the expanding die is arranged at the front end of the pull rod; the diameter-expanding die comprises a diameter-expanding module and a conical head which are sleeved at the front end of the pull rod, the conical head is arranged at the front end of the diameter-expanding module, a space for accommodating the conical head is arranged between the front end of the diameter-expanding module and the pull rod, and the rear end of the diameter-expanding module is provided with a sleeve fixedly connected with the pull rod; the diameter-expanding module is a tubular shape with openings at two ends, the tubular inner wall is in a conical shape, the thickness of the rear part of the tubular shape is larger than that of the front part of the tubular shape, the outer wall of the tubular shape is provided with a front section, a middle section and a rear section, the outer wall of the front section is arc-shaped, the outer wall of the middle section and the outer wall of the rear section are straight cylinders, the outer diameter of the rear section is smaller than the outer diameter of the middle section, the inner diameter of the rear section is larger than the inner diameter of the middle section, the front end of the middle section is smoothly connected with the rear end of the front section, and the outer diameter of the front end of the front section is smaller than the outer diameter of the middle section and larger than the outer diameter of the pull rod.
The technical problem to be solved by the utility model can be also realized by the following technical scheme that the diameter of the arc-shaped section of the outer wall of the front section is larger than 2000mm, preferably 5000mm.
The technical problem to be solved by the utility model can be also realized by the following technical scheme that the inner wall of the diameter-expanding die is connected with the conical head through a T-shaped key.
The technical problem to be solved by the utility model can also be achieved by the following technical scheme that the sleeve consists of a copper sleeve arranged on the pull rod and a guide disc arranged at the front end of the copper sleeve, wherein the guide disc is circumferentially provided with fastening bolts connected with the diameter-expanding die, and the fastening bolts are uniformly arranged along the circumferential direction of the guide disc.
The technical problem to be solved by the utility model can also be realized by the following technical scheme that a large nut used for limiting the conical head is arranged on a pull rod at the front end of the conical head, and the large nut is fixedly connected with the conical head through a hexagon socket head cap screw.
Compared with the prior art, the diameter expansion module is integrally formed, and the arc-shaped section is arranged at the front end of the diameter expansion module, and the middle section is smoothly connected with the front end, so that the bamboo joint phenomenon is well improved, the diameter expansion capacity and the diameter expansion efficiency are improved, and the specific pressure of the conical head and the diameter expansion module is effectively increased; the diameter of the arc-shaped section is changed from the original R2000 to R5000, and the front end of the diameter expansion module adopts a whole section of radian, so that the stress of the steel pipe is more uniform. Through the above-mentioned optimal design, be favorable to expanding the head and get into the steel pipe more, the steel pipe quality that expands out is better, more pleasing to the eye.
Drawings
FIG. 1 is a block diagram of a diameter expanding head for a mechanical steel pipe expander according to the present utility model;
FIG. 2 is a block diagram of an expansion module;
fig. 3 is a B-B cross-sectional view of fig. 2.
In the figure: the device comprises a 1-sleeve, a 2-T-shaped key, a 3-conical head, a 4-large nut, a 5-pull rod, a 6-expanding module, a 7-tubular front section, an 8-tubular middle section and a 9-tubular rear section.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.
In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Referring to fig. 1-3, a diameter expanding head for a mechanical steel pipe expander comprises a diameter expanding die and a pull rod 5 connected with the mechanical steel pipe expander, wherein the diameter expanding die is arranged at the front end of the pull rod 5; the diameter-expanding die comprises a diameter-expanding module 6 and a conical head 3 which are sleeved at the front end of the pull rod, the conical head 3 is arranged at the front end of the diameter-expanding module 6, a space for accommodating the conical head 3 is arranged between the front end of the diameter-expanding module 6 and the pull rod 5, the inner wall of the diameter-expanding die 6 is connected with the conical head 3 through a T-shaped key 2, and the rear end of the diameter-expanding module 6 is provided with a sleeve 1 fixedly connected with the pull rod 5; the expanding module 6 is a tubular shape with openings at two ends, the tubular inner wall is in a conical shape, the thickness of the rear part of the tubular shape is larger than that of the front part of the tubular shape, the outer wall of the tubular shape is provided with three sections of front section, middle section and rear section, the outer wall of the front section 7 is arc-shaped, the outer wall of the middle section 8 and the outer wall of the rear section 9 are straight cylinder-shaped, the outer diameter of the rear section 9 is smaller than the outer diameter of the middle section 8, the inner diameter of the rear section 9 is larger than the inner diameter of the middle section 8, the front end of the middle section 8 is smoothly connected with the rear end of the front section 7, the front end of the middle section 8 is tangent with the rear end of the front section 7, the transition is smooth, the bamboo joint phenomenon generated by step expansion in expanding is reduced, the outer diameter of the front end of the front section 7 is smaller than the outer diameter of the middle section 8 and larger than the outer diameter of the pull rod 5, the arc degree of the tubular front section 7 is changed from R2000 to R5000, and the arc of the front section of the expanding module 6 is modified by a part of arc of the front section, so that the steel pipe is stressed more uniformly, and the quality of the expanding steel pipe can be improved.
The sleeve 1 consists of a copper sleeve arranged on a pull rod 5 and a guide disc arranged at the front end of the copper sleeve, wherein fastening bolts connected with a diameter expanding module 6 are circumferentially arranged on the guide disc, the fastening bolts are uniformly arranged along the circumference of the guide disc, a large nut 4 used for limiting the conical head 3 is arranged on the pull rod 5 at the front end of the conical head 3, and the large nut 4 is fixedly connected with the conical head 3 through a hexagon socket head cap screw.
The expanding head can improve the appearance quality of products, and can better and effectively improve the butting speed and efficiency in the construction process; meanwhile, the ovality of the steel pipe is improved, the bamboo joint phenomenon is reduced, and the product quality is improved.
The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.
Claims (6)
1. The expanding head for the mechanical steel pipe expanding machine is characterized by comprising an expanding die and a pull rod connected with the mechanical steel pipe expanding machine, wherein the expanding die is arranged at the front end of the pull rod; the diameter-expanding die comprises a diameter-expanding module and a conical head which are sleeved at the front end of the pull rod, the conical head is arranged at the front end of the diameter-expanding module, a space for accommodating the conical head is arranged between the front end of the diameter-expanding module and the pull rod, and the rear end of the diameter-expanding module is provided with a sleeve fixedly connected with the pull rod; the diameter-expanding module is tubular with two ends open, the tubular inner wall is conical, the tubular outer wall is provided with a front section, a middle section and a rear section, the outer diameter of the rear section is smaller than that of the middle section, the outer diameter of the front end of the front section is smaller than that of the middle section, the outer walls of the middle section and the rear section are straight cylinders, the outer walls of the front section are arc-shaped, and the front end of the middle section is smoothly connected with the rear end of the front section.
2. The expanding head for a mechanical expanding machine for steel pipes according to claim 1, wherein the diameter of the arc-shaped section of the outer wall of the front section is larger than 2000mm.
3. A steel pipe mechanical expander head as claimed in claim 2 wherein the diameter of the arcuate section of the outer wall of the front section is 5000mm.
4. The expanding head for a mechanical expanding machine for steel pipes according to claim 1, wherein the inner wall of the expanding die is connected with the conical head through a T-shaped key.
5. The expanding head for a mechanical steel pipe expanding machine according to claim 1, wherein the sleeve consists of a copper sleeve arranged on the pull rod and a guide disc arranged at the front end of the copper sleeve, and the guide disc is circumferentially provided with fastening bolts connected with an expanding die, and the fastening bolts are uniformly arranged along the circumferential direction of the guide disc.
6. The expanding head for the mechanical expanding machine of steel pipes according to claim 1, wherein a large nut for limiting the conical head is arranged on a pull rod at the front end of the conical head, and the large nut is fixedly connected with the conical head through an inner hexagonal cylindrical head screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223191255.XU CN218903373U (en) | 2022-11-30 | 2022-11-30 | Expanding head for mechanical expanding machine of steel pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223191255.XU CN218903373U (en) | 2022-11-30 | 2022-11-30 | Expanding head for mechanical expanding machine of steel pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218903373U true CN218903373U (en) | 2023-04-25 |
Family
ID=86016373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223191255.XU Active CN218903373U (en) | 2022-11-30 | 2022-11-30 | Expanding head for mechanical expanding machine of steel pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218903373U (en) |
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2022
- 2022-11-30 CN CN202223191255.XU patent/CN218903373U/en active Active
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