CN218743940U - Rolling structure for cold rolling thin-wall pipe - Google Patents
Rolling structure for cold rolling thin-wall pipe Download PDFInfo
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- CN218743940U CN218743940U CN202223109827.5U CN202223109827U CN218743940U CN 218743940 U CN218743940 U CN 218743940U CN 202223109827 U CN202223109827 U CN 202223109827U CN 218743940 U CN218743940 U CN 218743940U
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- 238000005096 rolling process Methods 0.000 title claims abstract description 56
- 238000005097 cold rolling Methods 0.000 title claims abstract description 6
- 230000009467 reduction Effects 0.000 claims abstract description 9
- 230000007704 transition Effects 0.000 claims description 9
- 230000008859 change Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
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Abstract
The utility model discloses a cold rolling thin wall pipe is with rolling structure, including being a plurality of rolls (1) that circumference distributes, the outside of each roll (1) all is connected with slide (2), and the middle part of slide (2) is equipped with the spout, forms the guide plane on the slide of spout both sides, the guide plane includes first horizontal segment (4), feeding gyration section (5), reducing diameter section (6), reducing wall section (7), second horizontal segment (8) and changeover portion (9) that connect gradually; the horizontal length of the reducing section (6) is set as L 1 The reduction of the pipe is X 1 The diameter D of the circular arc of the reducing section (6) 1 Satisfy the formula
The horizontal length of the reduced wall section (7) is set to be L 2 The wall reduction amount of the pipe is X 2 The diameter D of the circular arc of the reduced wall section (7) 2 Satisfy the formula
The utility model discloses can effectively improve the rolling stability to the thin wall pipe.
Description
Technical Field
The utility model relates to a roll tubular construction, especially a rolling structure for cold rolling thin wall pipe.
Background
At present, a thin-walled tube is cold-rolled by using a circular tube blank as a raw material and enclosing a plurality of rollers to form a pass structure approximate to a finished product circle, then the pass of the rollers rolls on the top surface of a slideway, the tube is extruded through the height change of the top surface of the slideway and is formed on a fixed core rod, and the core rod has the size of the specification and the inner diameter of the finished tube so as to realize the change of the outer diameter, the inner diameter and the wall thickness from large to small, thereby finishing the rolling of the thin-walled tube.
However, when the conventional multi-roll cold pilger mill is used for rolling thin-walled tubes, the problem that the rolled tubes are bamboo-like is caused, so that the straightness of the rolled tubes is more than 1mm/1000mm, the subsequent straightening is required, the processing cost of the tubes is increased, the mechanical properties of the tubes are influenced, and the requirements on higher performance cannot be met.
Therefore, a rolling structure capable of improving rolling stability of a thin-walled tube is required.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a cold rolling thin wall pipe is with rolling structure. The rolling stability of the thin-walled tube can be effectively improved.
The technical scheme of the utility model: a rolling structure for a cold-rolled thin-wall pipe comprises a plurality of rollers which are distributed in the circumferential direction, the outer side of each roller is connected with a slideway, the middle part of each slideway is provided with a chute, the slideways on the two sides of the chute form a guide plane, the rollers are provided with annular rolling grooves, the rolling grooves of the rollers form a rolling pass after being mutually enclosed, and the guide plane comprises a first horizontal section, a feeding rotary section, a reducing section, a second horizontal section and a transition section which are sequentially connected; the horizontal length of the reducing section is set to be L 1 The reduction of the pipe is X 1 Diameter D of arc of reduced diameter section 1 Satisfy the formula
The horizontal length of the reduced wall section is set to be L 2 The wall reduction amount of the pipe is X 2 Circular arc diameter D of the reduced wall section 2 Satisfies the formula>
In the rolling structure for the cold-rolled thin-wall pipe, the transition section and the feeding rotary section are inclined sections, and the reducing section and the reducing wall section are curved sections which are convex outwards.
In the rolling structure for the cold-rolled thin-wall pipe, the reducing section and the reducing wall section are all smoothly connected circular arc sections.
In the rolling structure for the cold-rolled thin-wall pipe, the rolling groove includes the bottom arc segment, the bottom arc segment is bilaterally symmetrical along the rolling center of the rolling groove, the diameter of the bottom arc segment is consistent with the outer diameter of the finished pipe, and the two ends of the bottom arc segment are sequentially connected with the side arc segment and the top arc segment.
In the rolling structure for the cold-rolled thin-wall pipe, the outer diameter of the finished pipe is set to be D 3 The diameter D of the side arc segment (9) 4 Satisfy the formula
In the rolling structure for the cold-rolled thin-wall pipe, the radius of the top arc section is 0.2-3 mm.
In the rolling structure for the cold-rolled thin-wall pipe, the sum of the arc angle of the bottom arc section and the arc angles of the side arc sections at two sides is 110 to 120 degrees, and the angle of the side arc section is 8 to 15 degrees.
Compared with the prior art, the utility model discloses a to reducing diameter section and reducing wall section's formula injectd for technical staff can be based on the rolling specification X of tubular product 1 、L 1 、X 2 And L 2 Directly deducing the circular arc diameters of the reducing section and the reducing wall section; the limitation of the diameter of the circular arc can achieve the aim of dispersive deformation by increasing the length of the reducing section, so that the center of the rolling mill is more stable, the dimensional stability and the straightness of the pipe after rolling are improved, and the spiral mark of the inner diameter of the thin-walled pipe is reduced; on the basis, the forming effect of the roller on the outer diameter of the pipe can be improved by limiting the structures of the bottom arc section and the side arc section, so that the bamboo-shaped defect formed on the surface of the pipe when the opening degree is too large is avoided on one hand, and the edge surface on the surface of the pipe when the opening degree is too small is avoided on the other hand, so that the rolling quality of the pipe is improved; and through the aforesaid cooperation, make the utility model discloses can be with the internal diameter deviation control of finished product tubular product 0- +0.05mm within range, need not to carry out the later stage and straighten, effectively improve the rolling stability to the thin wall pipe.
Drawings
FIG. 1 is a schematic view of the structure of a roll;
fig. 2 is a schematic structural view of the slide.
The labels in the figures are: 1-roller, 2-slideway, 3-groove, 4-first horizontal section, 5-feeding rotary section, 6-reducing section, 7-reducing section, 8-second horizontal section, 9-transition section, 10-bottom arc section, 11-side arc section and 12-top arc section.
Detailed Description
The following description is made with reference to the accompanying drawings and examples, but not to be construed as limiting the invention.
Examples are given. Cold foodThe rolling structure for rolling the thin-wall pipe comprises a plurality of rollers 1 which are distributed in the circumferential direction, the outer side of each roller 1 is connected with a slideway 2, the middle part of each slideway 2 is provided with a sliding chute, the slideways on the two sides of the sliding chute form a guide plane, each roller 1 is provided with an annular rolling groove 3, the rolling grooves 3 of each roller 1 form a rolling pass after being mutually enclosed, and the guide plane comprises a first horizontal section 4, a feeding rotary section 5, a reducing section 6, a reducing section 7, a second horizontal section 8 and a transition section 9 which are sequentially connected; the horizontal length of the reducing section 6 is set to be L 1 The reduction of the pipe is X 1 The diameter D of the arc of the reducing section 6 1 Satisfy the formula
Let the horizontal length of the reduced wall section 7 be L 2 The wall reduction amount of the pipe is X 2 The diameter D of the circular arc of the reduced wall section 7 2 Satisfy the formula
The horizontal length L of the reducing section 6 1 Reducing X of pipe 1 Horizontal length L of the reduced wall section 7 2 The wall reduction amount of the tubular product is X 2 Are directly defined by the gauge of the rolled tube.
The transition section 9 and the feeding rotary section 5 are both inclined sections, and the reducing section 6 and the reducing wall section 7 are both curved sections which are convex outwards.
The reducing section 6 and the reducing wall section 7 are both smoothly connected circular arc sections.
The rolling groove 3 comprises a bottom arc section 10, the bottom arc section 10 is symmetrical along the rolling center of the rolling groove 3 in the left-right direction, the diameter of the bottom arc section 10 is consistent with the outer diameter of a finished product pipe, two ends of the bottom arc section 10 are sequentially connected with a lateral arc section 11 and a top arc section 12 which are symmetrical, the lateral arc section 11 is connected with the bottom arc section 10 in a smooth mode, and the protruding direction of the lateral arc section 11 is opposite to the protruding direction of the bottom arc section 10.
Setting the outer diameter of the finished pipe to be D 3 Arc diameter D of the side arc segment 11 4 Satisfy the formula
The bottom arc segment 10 and the side arc segment 11 are in smooth transition at the junction. />
The radius of the top arc section 12 is 0.2-3 mm.
The sum alpha +2 beta of the arc angle of the bottom arc section 10 and the arc angles of the side arc sections 11 at two sides is 110-120 degrees, and the arc angle beta of the side arc section 11 is 8-15 degrees.
The utility model discloses a theory of operation: the utility model discloses roll 1 installs on slide 2 to use first horizontal segment 4 as initial position, follow feeding gyration section 5, reducing section 6, reducing wall section 7, second horizontal segment 8 and changeover portion 9 in proper order and remove towards the tubular product direction and extrude the outer wall of tubular product, thereby realize rolling effect. When the roller 1 moves to the transition section 9, the roller and the pipe wall are separated from each other, and then the roller rotates at the transition section 9 and moves reversely to the first horizontal section 4, so that one-time rolling action on the pipe is realized. In the rolling process of the roller 1 along the slideway 2, the rolling stability of the roller 1 to the pipe can be improved and the spiral mark of the inner diameter of the thin-wall pipe is effectively reduced by limiting the parameters of the reducing section 6 and the reducing section 7; the shape of the rolling groove 3 is limited, so that the bamboo joint defects and the edge surfaces formed by rolling the surface of the pipe can be eliminated, and the rolling quality of the pipe is improved. Under the above-mentioned cooperation, make the utility model discloses when rolling to tubular product, its internal diameter deviation can be controlled within 0.04mm, and the practitioner effectively improves the rolling quality to tubular product.
Claims (7)
1. The utility model provides a rolling structure for cold rolling thin wall pipe, is including being a plurality of rolls (1) that circumference distributes, and the outside of every roll (1) all is connected with slide (2), and the middle part of slide (2) is equipped with the spout, forms the guidance plane on the slide of spout both sides, all is equipped with annular rolling groove (3) on roll (1), and rolling groove (3) of each roll (1) form rolling pass, its characterized in that after enclosing each other: the guide plane comprises a first horizontal section (4), a feeding rotary section (5), a reducing section (6), a reducing wall section (7), a second horizontal section (8) and a transition section (9) which are connected in sequence; the horizontal length of the reducing section (6) is set as L 1 The reduction of the pipe is X 1 The diameter D of the circular arc of the reducing section (6) 1 Satisfy the formula
The horizontal length of the reducing wall section (7) is set as L 2 The wall reduction amount of the pipe is X 2 The diameter D of the circular arc of the reduced wall section (7) 2 Satisfies the formula->
2. The rolling structure for a cold-rolled thin-walled tube according to claim 1, characterized in that: the transition section (9) and the feeding rotary section (5) are inclined sections, and the reducing section (6) and the reducing wall section (7) are curved sections which are convex outwards.
3. The rolling structure for a cold-rolled thin-walled tube according to claim 2, characterized in that: the reducing section (6) and the reducing wall section (7) are both smoothly connected circular arc sections.
4. The rolling structure for a cold-rolled thin-walled tube according to claim 1, characterized in that: the rolling groove (3) comprises a bottom arc section (10), the bottom arc section (10) is symmetrical along the rolling center of the rolling groove (3) in the left-right direction, the diameter of the bottom arc section (10) is consistent with the outer diameter of a finished pipe, and two ends of the bottom arc section (10) are sequentially connected with a side arc section (11) and a top arc section (12).
5. The rolling structure for a cold-rolled thin-walled tube according to claim 4, characterized in that: setting the outer diameter of the finished pipe to be D 3 The diameter D of the side arc segment (11) 4 Satisfy the formula
6. The rolling structure for a cold-rolled thin-walled tube according to claim 4, characterized in that: the radius of the top arc section (12) is 0.2-3 mm.
7. The rolling structure for a cold-rolled thin-walled tube according to claim 4, characterized in that: the sum of the arc angle of the bottom arc section (10) and the arc angles of the side arc sections (11) at two sides is 110-120 degrees, and the angle of the side arc section (11) is 8-15 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223109827.5U CN218743940U (en) | 2022-11-22 | 2022-11-22 | Rolling structure for cold rolling thin-wall pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223109827.5U CN218743940U (en) | 2022-11-22 | 2022-11-22 | Rolling structure for cold rolling thin-wall pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218743940U true CN218743940U (en) | 2023-03-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223109827.5U Active CN218743940U (en) | 2022-11-22 | 2022-11-22 | Rolling structure for cold rolling thin-wall pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218743940U (en) |
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- 2022-11-22 CN CN202223109827.5U patent/CN218743940U/en active Active
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