CN112404137B - Automatic roll changing device and method for continuous tube mill - Google Patents
Automatic roll changing device and method for continuous tube mill Download PDFInfo
- Publication number
- CN112404137B CN112404137B CN202011298305.7A CN202011298305A CN112404137B CN 112404137 B CN112404137 B CN 112404137B CN 202011298305 A CN202011298305 A CN 202011298305A CN 112404137 B CN112404137 B CN 112404137B
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- driving
- roll changing
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000005540 biological transmission Effects 0.000 claims abstract description 76
- 238000001514 detection method Methods 0.000 claims abstract description 13
- 230000007246 mechanism Effects 0.000 claims description 9
- 230000004048 modification Effects 0.000 claims description 5
- 238000012986 modification Methods 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 abstract description 10
- 229910000831 Steel Inorganic materials 0.000 abstract description 7
- 239000010959 steel Substances 0.000 abstract description 7
- 210000001503 joint Anatomy 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000004075 alteration Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
- B21B31/08—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts
- B21B31/10—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts by horizontally displacing, i.e. horizontal roll changing
- B21B31/103—Manipulators or carriages therefor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
The invention belongs to the technical field of metallurgical steel rolling, and provides an automatic roll changing device and method of a continuous tube mill, which aim to solve the problems of low automation degree, long time consumption, low efficiency and the like in the roll changing process of the continuous tube mill. The roll changing device comprises a driving arm, a first driving, a second driving, a swing arm and a bracket arm which are arranged on a supporting member, wherein one end of the driving arm is connected with the first driving, and the other end of the driving arm acts on a transmission shaft and is used for retracting, disengaging or extending and resetting the transmission shaft; one end of the swing arm is connected with the second drive, and the other end of the swing arm is connected with one end of the bracket arm; the other end of the bracket arm acts on the transmission shaft and is used for supporting the transmission shaft when the transmission shaft is retracted, released and extended for resetting, and the first drive and the second drive are provided with position detection elements. The roll changing device can ensure that the positioning precision of the transmission shaft is high, the transmission shaft can be automatically jointed, the butt joint of the shafts does not need to be checked manually, the full automation of the roll changing process of the continuous tube mill is realized, the roll changing time is shortened, and the production efficiency is improved.
Description
Technical Field
The invention belongs to the technical field of metallurgical steel rolling, and particularly relates to an automatic roll changing device and method of a continuous tube mill.
Background
The connection between the speed reducer and the roller of the steel tube continuous rolling mill is a telescopic drum-shaped tooth-connected transmission shaft, the shaft body of the steel tube continuous rolling mill is hollow, and a set of spring components are arranged in the steel tube continuous rolling mill. When the roll is replaced, the transmission shaft is supported by the supporting member, and the transmission shaft drives retraction to be disconnected with the connection between the rolls so as to leave a roll replacing channel of the stand. On the operating side, a hydraulically driven stand exchange mechanism is provided for receiving the old stand pulled out of the rolling mill and for loading the new stand. When the new frame is pushed in, the compressed spring inside the shaft automatically rebounds, and the transmission shaft extends out to be connected with the roller. However, springs often encounter various drag during operation, making the position of the drive shaft uncertain. In addition, three rolls of the three-roll tandem rolling mill for steel pipes are arranged at 120 degrees, and a support member cannot be arranged on a shaft head close to the roll side due to structural and space limitations. Thus, when changing rolls, the drive shaft can only be disengaged at the crowned teeth. In the process of connecting the transmission shaft and the roller, the positioning precision of the transmission shaft is not high, so that the butt joint of the transmission shaft is difficult; meanwhile, due to the small tooth gaps of the crowned teeth, the butt joint of the crowned teeth is difficult, in actual operation, the butt joint condition of the shaft needs to be observed from the shaft head side of the coupler manually, and the interphone and the operation desk are used for carrying out dialogue communication, so that the replacement efficiency is affected.
Disclosure of Invention
In view of the above, the invention aims to provide an automatic roll changing device and method for a mandrel mill, which aim to solve the problems of low automation degree, long time consumption, low efficiency and the like in the roll changing process of the mandrel mill.
The invention is realized by the following technical scheme:
The invention provides an automatic roll changing device of a continuous tube mill, which comprises a driving arm, a first driving, a second driving, a swinging arm and a bracket arm, wherein the driving arm, the first driving, the second driving, the swinging arm and the bracket arm are arranged on a supporting member; one end of the swing arm is connected with the second drive, and the other end of the swing arm is connected with one end of the bracket arm; the other end of the bracket arm acts on the transmission shaft and is used for supporting the transmission shaft when the roller rack and the transmission shaft are disconnected and connected, and the first drive and the second drive are provided with position detection elements.
Further, the length of the swing arm is greater than the length of the bracket arm.
Further, the length of the swing arm is more than 1.5 times of the length of the bracket arm.
Further, a hydraulic lock and a proportional valve which are interlocked with the position detecting element are arranged in the hydraulic system of the first drive and the second drive.
Further, the driving arm is provided with a roller acting on the driving shaft, and the driving shaft is provided with a clamping groove matched with the roller along the axial direction of the driving shaft.
Further, the two ends of the clamping groove are respectively provided with a retracting side chuck and an extending side chuck for resisting the roller.
Further, the end part of the transmission shaft, facing the crowned teeth of the roller rack, is provided with a chamfer modification and a guide section; the external teeth of the crowned teeth and the internal tooth sleeve meshed with the external teeth are respectively provided with a positioning block at the position corresponding to the tooth top or tooth root.
The device further comprises a frame replacement mechanism, and the frame replacement mechanism mainly comprises a roll changing trolley, a transverse moving drive and a longitudinal moving drive, wherein the roll changing trolley is used for placing a roll frame and is provided with two rollers which are connected in series along the driving direction of the transverse moving drive; the transverse movement drive is used for moving the roll changing trolley; the longitudinal movement drive is used for pushing and pulling the roller frame.
The invention also provides an automatic roll changing method of the mandrel mill, which is based on the roll changing device and comprises the following steps: 1) The second drive causes the swing arm to drive the supporting arm to support the transmission shaft; 2) The first drive drives the driving arm to retract and disengage the transmission shaft; 3) Pulling out the roll stand to be replaced, which is disconnected from the transmission shaft, by a stand replacing mechanism, and pushing in a new roll stand; 4) The positioning control bracket arm supports the transmission shaft; 5) The first drive drives the driving arm to extend and reset the transmission shaft to be engaged with the new roller rack; 6) Releasing the first drive and the second drive.
Preferably, step 5) further comprises the steps of: 5.1 A position detection element on the first drive stops the driving arm at a corresponding roller of the drum-shaped tooth of the transmission shaft, which is about to be contacted with the roller rack; 5.2 Rotating the drive shaft to align the crowned teeth; 5.3 Continuing to extend the drive shaft by the drive arm for return engagement.
The invention has the advantages that:
1. According to the roll changing device, two sets of driving structures are designed on the transmission shaft, one set of driving structures can actively drive the transmission shaft to retract, disengage, extend and reset, the other set of driving structures can support the transmission shaft when the transmission shaft retracts or extends, and the position of the transmission shaft is controllable through the position detection element, so that the active accurate resetting connection of the transmission shaft is realized.
2. According to the roll changing device, the length of the swing arm for supporting the transmission shaft is designed to be far longer than that of the supporting arm, so that the positioning accuracy of the transmission shaft can be greatly improved.
3. The roller changing device can ensure that the transmission shaft stays at any position by arranging the interlocked position detection element and the hydraulic lock, and ensure that the transmission shaft can realize the alignment of the crowned teeth before being butted, and then is automatically jointed, thereby greatly improving the production efficiency.
In general, the roll changing device and the roll changing method can realize full automation of the roll changing process of the continuous tube mill, shorten the roll changing time of the steel tube continuous tube mill and improve the production efficiency.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objects and other advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.
Drawings
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings, in which:
Fig. 1 is a schematic view of the roll changing device of the present invention.
Fig. 2 is a schematic view of the structure of the partial drive shaft and support member in fig. 1.
Fig. 3 is a schematic plan view of a roll changing apparatus of the present invention.
Reference numerals: 1 is a roller rack, 2 is a transmission shaft, 3 is a clamping groove, 4 is a driving arm, 5 is a first driving, 6 is a position detection element, 7 is a second driving, 8 is a swinging arm, 9 is a supporting arm, 10 is a supporting member, 11 (11 a, 11 b) is a roll changing trolley, 12 is a transverse moving driving, and 13 is a longitudinal moving driving; 2a is an inner tooth sleeve, 2b is an outer tooth; 3a is a retraction side chuck and 3b is an extension side chuck.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be noted that the illustrations provided in the following embodiments merely illustrate the basic idea of the present invention by way of illustration, and the following embodiments and features in the embodiments may be combined with each other without conflict.
As shown in fig. 1 and 2, the automatic roll changing device of the mandrel mill mentioned in the present embodiment is used for realizing the disengagement and engagement between the roll stand 1 and the transmission shaft 2, and comprises a driving arm 4, a first driving arm 5, a second driving arm 7, a swinging arm 8 and a bracket arm 9 which are arranged on a supporting member 10, wherein one end of the driving arm 4 is connected with the first driving arm 5, the other end of the driving arm is applied to the transmission shaft 2 and used for retracting the transmission shaft 2 so as to disengage the roll stand 1 from the transmission shaft 2 or reset the transmission shaft 2 so as to engage the roll stand 1 with the transmission shaft 2; one end of the swing arm 8 is connected with the second drive 7, and the other end of the swing arm is connected with one end of the bracket arm 9; the other end of the bracket arm 9 acts on the transmission shaft 2 and is used for supporting the transmission shaft 2 when the roller rack 1 and the transmission shaft 2 are disengaged and engaged; the first drive 5 and the second drive 6 are provided with position detection elements 6, which are hydraulic cylinders and are provided with corresponding hydraulic systems. By adopting the scheme, the roll changing device has the advantages that two sets of driving structures are designed through the driving mechanism, one set of driving structure can actively drive the roll changing device to retract, disengage and extend for resetting, the other set of driving structure can support the driving shaft when the driving shaft retracts or extends, and the position of the driving shaft is controllable through the position detection element, so that the roll changing device is favorable for realizing the active accurate resetting joint of the driving shaft.
In this embodiment, the length L 1 of the swing arm 8 is greater than the length L 2 of the bracket arm 9, especially, the length of the swing arm 8 is more than 1.5 times of the length of the bracket arm 9, i.e., L 1≥1.5L2, so that when the transmission shafts swing by the same angle, the displacement value of the second drive is larger, and the positioning accuracy of the transmission shafts can be greatly improved.
The hydraulic system of the first drive 5 and the second drive 7 in the embodiment is provided with the hydraulic lock and the proportional valve which are interlocked with the position detection element 6, so that the transmission shaft can stay at any position, the alignment of the crowned teeth can be realized before the transmission shaft is in butt joint, and then the transmission shaft is automatically jointed, thereby greatly improving the production efficiency.
The driving arm 4 in the embodiment is provided with a roller (not marked) acting on the driving shaft 2, the driving shaft 2 is provided with a clamping groove 3 matched with the roller along the axial direction of the driving shaft, the clamping groove 3 is of a detachable structure, and two ends of the clamping groove 3 are respectively provided with a retracting side chuck 3a and an extending side chuck 3b for resisting the roller; the retracting side chuck is arranged at one side far away from the roller rack and can be integrated with the transmission shaft, and the extending side chuck is arranged at one side close to the roller rack and can be formed by combining two semicircular handles. The number of the rollers can be two, the distance between the rollers is within the range of the clamping groove on the transmission shaft, and the rotation and the swing of the transmission shaft are not influenced.
The end of the drive shaft 2 facing the crowned teeth of the roll stand 1 in this embodiment is provided with a chamfer modification and with a guide section for facilitating the entry of the drive shaft into the corresponding roll in the roll stand; the external teeth 2b of the crowned teeth and the internal tooth sleeve 2a meshed with the external teeth 2b are provided with positioning blocks (not shown) at positions corresponding to tooth tops or tooth roots of the crowned teeth, so that the external teeth and the internal tooth sleeve are arranged.
As shown in fig. 2 and 3, the roll changing device in this embodiment further includes a frame changing mechanism, which is mainly composed of a roll changing carriage 11, a traversing drive 12, and a longitudinal moving drive 13, wherein the roll changing carriage 11 is used for placing the roll frame 1, and is provided with two roll frames, such as 11a and 11b, which are connected in series along the driving direction of the traversing drive 12, and are used for respectively receiving the roll frame to be changed pulled out from the rolling mill and loading a new roll frame; the traversing drive 12 adopts a hydraulic cylinder for moving the roll changing trolley 11; the longitudinal movement drive 13 also employs a hydraulic cylinder for pushing the roll stand 1. The roll stand is thus pushed in or pulled out of the rolling mill by a longitudinal displacement drive to the roll changing carriage 11, while the roll changing carriage 11 is moved out of the rolling line by a traversing drive 12.
When the roller is replaced, the transmission shaft 2 is driven by the second drive 7 on the supporting member 10 to drive the swing arm 8 to drive the supporting arm 9 to lift, and the transmission shaft is supported and supported; the first drive 5 drives the drive arm 4 to retract and disengage the drive shaft 2 so as to disengage from the roll stand to be replaced; pulling out the roll stand to be replaced by a stand replacing mechanism, pushing in a new roll stand, locking the new roll stand, and setting the new roll stand at a roll replacing position by a pressing device; then, the bracket arm is precisely positioned by controlling the position detecting element on the second drive to support the transmission shaft; the first drive drives the driving arm to extend and reset the transmission shaft, and when the position detection element 6 on the first drive detects that the crowned teeth of the transmission shaft are about to contact the corresponding rollers on the roller rack, the driving arm is stopped; then, the main motor (not marked) rotates slowly to drive the transmission shaft to rotate, so that the teeth of the crowned teeth are aligned, and then the first drive drives the driving arm to drive the transmission shaft to extend out and reset continuously so as to enable the transmission shaft to be jointed with a new roller frame, and finally, the first drive and the second drive are released, so that the driving arm and the bracket arm do not generate acting force on the transmission shaft, and the transmission shaft and the new roller frame work normally.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, and it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (6)
1. An automatic roll changing device of a continuous tube mill is characterized by comprising a driving arm (4), a first driving arm (5), a second driving arm (7), a swinging arm (8) and a supporting arm (9) which are arranged on a supporting member (10), wherein one end of the driving arm (4) is connected with the first driving arm (5), the other end of the driving arm acts on a transmission shaft (2) and is used for retracting the transmission shaft (2) so as to disconnect a roller frame (1) from the transmission shaft (2) or reset the transmission shaft (2) so as to enable the roller frame (1) to be connected with the transmission shaft (2); one end of the swing arm (8) is connected with the second drive (7), and the other end of the swing arm is connected with one end of the supporting arm (9); the other end of the supporting arm (9) acts on the transmission shaft (2) and is used for supporting the transmission shaft (2) when the roller rack (1) and the transmission shaft (2) are disconnected and connected; the first drive (5) and the second drive (7) are provided with position detection elements (6);
the length of the swing arm (8) is longer than that of the supporting arm (9);
a hydraulic lock and a proportional valve which are interlocked with the position detection element (6) are arranged in the hydraulic system of the first drive (5) and the second drive (7);
the driving arm (4) is provided with a roller acting on the driving shaft (2), and the driving shaft (2) is axially provided with a clamping groove (3) matched with the roller;
the two ends of the clamping groove (3) are respectively provided with a retracting side chuck (3 a) and an extending side chuck (3 b) for resisting the roller.
2. The automatic roll changing device of a mandrel mill according to claim 1, characterized in that the length of the swing arm (8) is more than 1.5 times the length of the bracket arm (9).
3. The automatic roll changing device of a mandrel mill according to claim 1, characterized in that the end of the drive shaft (2) facing the roller stand (1) is provided with a chamfer modification and with a guide section; the external teeth (2 b) of the crowned teeth and the internal tooth sleeve (2 a) meshed with the external teeth (2 b) are respectively provided with a positioning block at the position corresponding to the tooth tops or tooth roots.
4. A tandem mill automatic roll changing device according to any one of claims 1-3, characterized by further comprising a frame changing mechanism mainly composed of a roll changing trolley (11), a traversing drive (12), a longitudinal displacement drive (13), the roll changing trolley (11) being used for placing a roll frame (1) and being provided with two members connected in series in the driving direction of the traversing drive (12); the transverse movement drive (12) is used for moving the roll changing trolley (11); the longitudinal movement drive (13) is used for pushing and pulling the roller frame (1).
5. A roll changing method using the automatic roll changing apparatus of a mandrel mill according to claim 4, comprising the steps of:
1) The second drive (7) drives the swing arm (8) to drive the supporting arm (9) to support the transmission shaft (2);
2) The first drive (5) drives the drive arm (4) to retract and disconnect the transmission shaft (2);
3) Pulling out the roll stand (1) to be replaced, which is disconnected from the transmission shaft (2), by a stand replacing mechanism and pushing in a new roll stand (1);
4) The positioning control bracket arm (9) supports the transmission shaft (2);
5) The first drive (5) drives the drive arm (4) to extend and reset the transmission shaft (2) to be engaged with the new roller frame (1);
6) Releasing the first drive (5) and the second drive (7).
6. The roll change method of claim 5, wherein step 5) further comprises the steps of:
5.1 A position detection element (6) on the first drive (5) enables the driving arm (4) to stop at the corresponding roller of the drum-shaped tooth of the transmission shaft (2) to be in contact with the roller frame (1);
5.2 Rotating the drive shaft (2) to align the crowned teeth;
5.3 Continuing to extend the drive shaft (2) by the drive arm (4) for return engagement.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011298305.7A CN112404137B (en) | 2020-11-18 | 2020-11-18 | Automatic roll changing device and method for continuous tube mill |
| PCT/CN2021/120568 WO2022105427A1 (en) | 2020-11-18 | 2021-09-26 | Automatic roll-changing apparatus and method for continuous pipe rolling mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011298305.7A CN112404137B (en) | 2020-11-18 | 2020-11-18 | Automatic roll changing device and method for continuous tube mill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112404137A CN112404137A (en) | 2021-02-26 |
| CN112404137B true CN112404137B (en) | 2024-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011298305.7A Active CN112404137B (en) | 2020-11-18 | 2020-11-18 | Automatic roll changing device and method for continuous tube mill |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN112404137B (en) |
| WO (1) | WO2022105427A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112404137B (en) * | 2020-11-18 | 2024-06-04 | 中冶赛迪工程技术股份有限公司 | Automatic roll changing device and method for continuous tube mill |
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| DE2845052A1 (en) * | 1978-10-16 | 1980-04-24 | Kocks Gmbh Friedrich | Rapid changing of roll housings - esp. in stretch reducing mill for mfg. tubes, where roll changing can be automated |
| US4329864A (en) * | 1980-08-11 | 1982-05-18 | Wean United, Inc. | Apparatus for changing rolls in vertical rolling mills |
| CN101985133A (en) * | 2010-11-04 | 2011-03-16 | 大连三高重工设备有限公司 | Vertical transmission device for vertical roller of rolling mill |
| CN203695611U (en) * | 2014-02-28 | 2014-07-09 | 中冶赛迪工程技术股份有限公司 | Shaft disengagement device |
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| JPS6224823A (en) * | 1985-07-25 | 1987-02-02 | Ishikawajima Harima Heavy Ind Co Ltd | Rearranging device for turks-head roll |
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| CN202174107U (en) * | 2011-07-14 | 2012-03-28 | 中冶赛迪工程技术股份有限公司 | Three-roller pipe continuous mill |
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| CN112404137B (en) * | 2020-11-18 | 2024-06-04 | 中冶赛迪工程技术股份有限公司 | Automatic roll changing device and method for continuous tube mill |
-
2020
- 2020-11-18 CN CN202011298305.7A patent/CN112404137B/en active Active
-
2021
- 2021-09-26 WO PCT/CN2021/120568 patent/WO2022105427A1/en active Application Filing
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Also Published As
| Publication number | Publication date |
|---|---|
| CN112404137A (en) | 2021-02-26 |
| WO2022105427A1 (en) | 2022-05-27 |
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