Jacking and expanding structure for seamless stainless steel pipe
By adopting multi-directional adjustment and laser detection technology in the cold rolling device of seamless stainless steel pipes, the problem of uneven extrusion of steel pipes caused by changes in the shape of the top protrusion is solved, and the stability and uniform cold rolling extrusion of the outer wall of the steel pipes are achieved.
Patent Information
- Application Number
- CN202420495618.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-14
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-03-14
AI Technical Summary
During the cold rolling and reaming process of seamless stainless steel pipes, the top protrusion head is squeezed for a long time and is difficult to maintain a good shape, resulting in inadequate extrusion treatment of the outer wall of the steel pipe.
A multi-directional adjustment cold rolling device is adopted, including an upper roll, a lower roll and an adjustment rod. The spacing between the upper and lower rolls is adjusted through the front and rear adjustment mechanism to ensure uniform extrusion of the outer wall of the steel pipe, and the accuracy of incoming materials and top protrusions is improved through laser straightening and detection mechanisms.
The stability of cold rolling extrusion on the outer surface of the steel pipe and the surface contact integrity are improved, the uniform treatment of the outer wall of the steel pipe is ensured, and the accuracy before cold rolling is improved.
Smart Images
Figure CN222679094U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of production of seamless stainless steel pipes, and in particular to a top extension and hole expansion structure for seamless stainless steel pipes. Background Art
[0002] At present, seamless stainless steel pipes are widely used in the transportation of various gas or fluid media, among which cold-rolled precision seamless steel pipes are mainly used for precision mechanical structures and hydraulic equipment. When cold rolling and expanding the hole, the top head needs to pass through the seamless stainless steel pipe, thereby changing the inner diameter of the seamless stainless steel pipe, and the seamless stainless steel pipe is cut off by the cutting device when it is processed to the appropriate length. For the convenience of expression, the seamless stainless steel pipe is referred to as a steel pipe in the following text.
[0003] In the relevant processing scheme, the steel pipe is processed by cold rolling device and straightening device, the top rolling head, upper roller and lower roller are coordinated inside and outside, the steel pipe is cold rolled and extruded, and the steel pipe is formed by the shape of the top rolling head.
[0004] During the expansion process, it is necessary to ensure that both the outer and inner surfaces of the steel pipe are extruded, and the inner wall of the steel pipe is expanded by the top expansion head. The top expansion head is squeezed for a long time and it is difficult to always maintain a good shape. The upper and lower rollers may not apply enough pressure on the steel pipe due to the change of the size of the top expansion head. The upper and lower rollers fail to squeeze in place, resulting in inadequate extrusion of the outer wall of the steel pipe. Utility Model Content
[0005] In order to improve the stability of cold rolling and extrusion of inner and outer walls of a steel pipe during diameter expansion, the purpose of the present application is to provide a top extension and hole expansion structure for a seamless stainless steel pipe.
[0006] The present application provides a top extension and hole expansion structure for a seamless stainless steel pipe, which adopts the following technical solution:
[0007] A jacking and hole-expanding structure for seamless stainless steel pipes, comprising a cold rolling device and a straightening device arranged in sequence, wherein the cold rolling device comprises an upper rolling roller, an upper adjusting rod sleeved outside the upper rolling roller, a lower rolling roller, a lower adjusting rod sleeved outside the lower rolling roller, and a jacking head for inserting into a steel pipe, and front and rear adjustment mechanisms are respectively provided at the front and rear of the upper and lower rolling rollers, wherein the front and rear adjustment mechanisms drive the upper rolling roller to move up and down through the upper adjusting rod, and the front and rear adjustment mechanisms drive the lower rolling roller to move up and down through the lower adjusting rod, and both the upper and lower rolling rollers are inclined toward the conveying material path of the steel pipe.
[0008] By adopting the above technical scheme, the steel pipe is inserted into the top head, and the outer wall of the steel pipe is squeezed by the upper roller and the lower roller. If the size of the steel pipe is changed, or the size of the top head is changed, the distance between the upper roller and the lower roller can be adjusted to maintain a good extrusion pressure, so that the outer wall of the steel pipe can be processed in place. The front adjustment mechanism and the rear adjustment mechanism are adjusted in a consistent manner, and the upper roller and the lower roller perform inclined extrusion on the steel pipe, which can disperse the extrusion force well and make the cold rolling extrusion stable.
[0009] Optionally, the front adjustment mechanism includes a front bracket, a front pressure block and a front push block on the front bracket, and a front drive assembly for driving the front push block to move.
[0010] By adopting the above technical solution, the front adjustment mechanism is actually divided into two parts as a whole. The front pressure block mainly relies on the front driving assembly to achieve pushing and extrusion, while the front top block is driven by another driving source. The two parts are independently positioned and can be inspected and maintained separately.
[0011] Optionally, the rear adjustment mechanism includes a rear support, a rear pressure block and a rear push block on the rear support, and a rear drive assembly for driving the rear push block to move.
[0012] By adopting the above technical solution, the structure of the rear adjustment mechanism is similar to that of the front adjustment mechanism, and can also achieve synchronous movement up and down.
[0013] Optionally, the front bracket is provided with two first guide columns for slidingly guiding the front push block and the front pressure block.
[0014] By adopting the above technical solution, two first guide pillars are used to ensure that the up and down movement of the front pressing block and the front pushing block is in a predetermined vertical direction, thereby reducing the deviation of the movement of the front pressing block and the front pushing block.
[0015] Optionally, the rear bracket is provided with two second guide posts for guiding the rear top block and the rear pressure block to slide.
[0016] By adopting the above technical solution, the rear pressing block and the rear ejecting block are slidably guided by the two second guide posts, which can reduce the movement and deviation of the rear pressing block and the rear ejecting block.
[0017] Optionally, a laser straightening mechanism is provided on the front bracket, and the laser straightening mechanism is located above the steel pipe conveying path.
[0018] By adopting the above technical solution, the laser straightening mechanism can irradiate the incoming steel pipe. By adjusting the angle of the laser straightening mechanism, the laser can be irradiated obliquely in the middle and lower direction. At this time, if there is a laser point at the vertex of the outer circumferential surface of the steel pipe, it means that the incoming direction of the steel pipe is straight. If the laser point is offset, the steel pipe needs to be realigned to make the steel pipe conveying direction accurate, and then the cold rolling extrusion point is accurate.
[0019] Optionally, a laser detection mechanism is provided on the rear bracket, and the laser detection mechanism is located above the telescopic path of the top extension.
[0020] By adopting the above technical solution, the rear-end detection is realized by using a laser detection mechanism, which is equivalent to performing a detection on the extended top extension head. Of course, the delivered steel pipe can also be detected. The two detections can timely find out whether the top extension head is straight and whether the steel pipe output is straight.
[0021] Optionally, the jacking head includes a long rod, a receiving seat and a jacking core which are threadedly connected in sequence.
[0022] By adopting the above technical solution, the jacking head adopts a split connection structure, which makes it easy to replace the jacking head and makes the processing more flexible.
[0023] In summary, the present application includes at least one of the following beneficial technical effects:
[0024] 1. The multi-directional adjustment method is adopted to improve the surface contact integrity of the outer surface of the steel pipe during cold rolling and extrusion;
[0025] 2. The multi-directional detection method is adopted to improve the accuracy of the incoming direction of the steel pipe before cold rolling processing and the accuracy of the expansion and contraction direction of the top extension head. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0027] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the present application;
[0028] Figure 2 It is an overall structural diagram of an embodiment of the present application;
[0029] Figure 3 It is a schematic diagram of the cross-sectional structure of the top extension head embodied in the embodiment of the present application;
[0030] In the figure, 1. cold rolling device; 11. upper rolling roller; 12. upper adjusting rod; 13. lower rolling roller; 14. lower adjusting rod; 15. top extension head; 151. long rod; 152. receiving seat; 153. top core; 2. straightening device; 3. front adjusting mechanism; 31. front bracket; 32. front pressure block; 33. front top block; 34. front driving mechanism; 35. first guide column; 4. rear adjusting mechanism; 41. rear bracket; 42. rear pressure block; 43. rear top block; 44. rear driving mechanism; 45. second guide column; 5. laser straightening mechanism; 6. laser detection mechanism; 7. steel pipe. DETAILED DESCRIPTION
[0031] The present application is further described in detail below in conjunction with all the accompanying drawings.
[0032] Example: Reference Figure 1 and Figure 2 A jacking and expanding hole structure for seamless stainless steel pipes, comprising a cold rolling device 1 and a straightening device 2 arranged in sequence, the cold rolling device 1 comprising an upper rolling roller 11, an upper adjusting rod 12 sleeved outside the upper rolling roller, a lower rolling roller 13, a lower adjusting rod 14 sleeved outside the lower rolling roller 13, and a jacking head 15 for inserting into a steel pipe 7, a front adjusting mechanism 3 and a rear adjusting mechanism 4 are respectively arranged at the front and rear of the upper rolling roller 11 and the lower rolling roller 13, the front adjusting mechanism 3 and the rear adjusting mechanism 4 drive the upper rolling roller 11 to move up and down through the upper adjusting rod 12, the front adjusting mechanism 3 and the rear adjusting mechanism 4 drive the lower rolling roller 13 to move up and down through the lower adjusting rod 14, and the upper rolling roller 11 and the lower rolling roller 13 are both inclined toward the conveying material path of the steel pipe 7. The steel pipe 7 is inserted into the top head 15, and then the upper roller 11 and the lower roller 13 are used to extrude the outer wall of the steel pipe 7. If the size of the steel pipe 7 is changed, or the size of the top head 15 is changed, the distance between the upper roller 11 and the lower roller 13 can be adjusted to maintain a good extrusion pressure so that the outer wall of the steel pipe 7 is processed in place. The front adjustment mechanism 3 and the rear adjustment mechanism 4 are adjusted in accordance with each other, and the upper roller 11 and the lower roller 13 perform inclined extrusion on the steel pipe 7, which can disperse the extrusion force well and make the cold rolling extrusion stable.
[0033] refer to Figure 1 The front adjustment mechanism 3 includes a front bracket 31, a front pressure block 32 and a front top block 33 on the front bracket 31, and a front driving assembly for driving the front top block 33 to move. The front adjustment mechanism 3 as a whole is actually divided into two parts. The front pressure block 32 is mainly driven by the front driving assembly to achieve pushing and extrusion, while the front top block 33 is driven by another driving source. The two are independently positioned and can be repaired separately. The rear adjustment mechanism 4 includes a rear bracket 41, a rear pressure block 42 and a rear top block 43 on the rear bracket 41, and a rear driving assembly for driving the rear top block 43 to move. The structure of the rear adjustment mechanism 4 is similar to that of the front adjustment mechanism 3, and can also achieve synchronous movement up and down.
[0034] refer to Figure 2 The front bracket 31 is provided with two first guide posts 35 for slidingly guiding the front top block 33 and the front pressure block 32. The use of two first guide posts 35 can make the up and down movement of the front pressure block 32 and the front top block 33 in a predetermined vertical direction, which can reduce the deviation of the front pressure block 32 and the front top block 33. The rear bracket 41 is provided with two second guide posts 45 for slidingly guiding the rear top block 43 and the rear pressure block 42. The rear pressure block 42 and the rear top block 43 are slidably guided by the two second guide posts 45, which can reduce the deviation of the rear pressure block 42 and the rear top block 43.
[0035] refer to Figure 1 and Figure 2 , a laser straightening mechanism 5 is provided on the front bracket 31, and the laser straightening mechanism 5 is located above the conveying path of the steel pipe 7. The laser straightening mechanism 5 can irradiate the incoming steel pipe 7. By adjusting the angle of the laser straightening mechanism 5, the laser is tilted to the middle and lower direction. At this time, if there is a laser point at the vertex of the outer peripheral surface of the steel pipe 7, it means that the incoming direction of the steel pipe 7 is straight. If the laser point is offset, the steel pipe 7 needs to be realigned to make the conveying direction of the steel pipe 7 accurate, and then the cold rolling extrusion point is accurate. A laser detection mechanism 6 is provided on the rear bracket 41, and the laser detection mechanism 6 is located above the telescopic path of the top extension. The laser detection mechanism 6 is used to realize the rear end detection, which is equivalent to performing a single detection on the extended top extension head 15. Of course, the delivered steel pipe 7 can also be detected. The two detections can timely find out whether the top extension head 15 is straight and whether the output of the steel pipe 7 is straight.
[0036] refer to Figure 3 The top extension head 15 comprises a long rod 151, a receiving seat 152 and a top core 153 which are threadedly connected in sequence. The top extension head 15 adopts a split connection structure, which makes it easy to replace the top extension head 15 and makes the processing more flexible.
[0037] Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The words "first", "second", "third" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "One" or "one" and similar words do not indicate a quantitative limit, but indicate that there is at least one. "Include" or "comprise" and similar words mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0038] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A top expansion structure for seamless stainless steel pipes, comprising a cold rolling device (1) and a straightening device (2) arranged in sequence, characterized in that: The cold rolling device (1) comprises an upper rolling roller (11), an upper adjusting rod (12) sleeved outside the upper rolling roller, a lower rolling roller (13), a lower adjusting rod (14) sleeved outside the lower rolling roller (13), and a top extension head (15) for inserting into a steel pipe (7). The upper rolling roller (11) and the lower rolling roller (13) are respectively provided with a front adjusting mechanism (3) and a rear adjusting mechanism (4) at the front and rear of the upper rolling roller (11) and the lower rolling roller (13). The front adjusting mechanism (3) and the rear adjusting mechanism (4) drive the upper rolling roller (11) to move up and down through the upper adjusting rod (12), and the front adjusting mechanism (3) and the rear adjusting mechanism (4) drive the lower rolling roller (13) to move up and down through the lower adjusting rod (14). The upper rolling roller (11) and the lower rolling roller (13) are both inclined toward the conveying material feeding path of the steel pipe (7).
2. The top extension and hole expansion structure for seamless stainless steel pipe according to claim 1, characterized in that: The front adjustment mechanism (3) comprises a front bracket (31), a front pressing block (32) and a front pushing block (33) located on the front bracket (31), and a front driving assembly for driving the front pushing block (33) to move.
3. The top extension and hole expansion structure for seamless stainless steel pipe according to claim 2, characterized in that: The rear adjustment mechanism (4) comprises a rear support (41), a rear pressing block (42) and a rear top block (43) located on the rear support (41), and a rear driving assembly for driving the rear top block (43) to move.
4. The top extension and hole expansion structure for seamless stainless steel pipe according to claim 2, characterized in that: The front bracket (31) is provided with two first guide posts (35) for guiding the front push block (33) and the front pressure block (32) to slide.
5. The top extension and hole expansion structure for seamless stainless steel pipe according to claim 3, characterized in that: The rear support (41) is provided with two second guide posts (45) for guiding the rear top block (43) and the rear pressing block (42) to slide.
6. The top extension and hole expansion structure for seamless stainless steel pipe according to claim 2, characterized in that: The front bracket (31) is provided with a laser straightening mechanism (5), and the laser straightening mechanism (5) is located above the conveying path of the steel pipe (7).
7. The top extension and hole expansion structure for seamless stainless steel pipe according to claim 3, characterized in that: The rear support (41) is provided with a laser detection mechanism (6), and the laser detection mechanism (6) is located above the telescopic path of the top extension.
8. The top extension and hole expansion structure for seamless stainless steel pipe according to claim 1, characterized in that: The jacking head (15) comprises a long rod (151), a receiving seat (152) and a jacking core (153) which are threadedly connected in sequence.