CN205463616U - High accuracy seamless steel pipe's four roller reducing mills - Google Patents
High accuracy seamless steel pipe's four roller reducing mills Download PDFInfo
- Publication number
- CN205463616U CN205463616U CN201620242841.8U CN201620242841U CN205463616U CN 205463616 U CN205463616 U CN 205463616U CN 201620242841 U CN201620242841 U CN 201620242841U CN 205463616 U CN205463616 U CN 205463616U
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Abstract
The utility model discloses a high accuracy seamless steel pipe's four roller reducing mills. The utility model discloses work frame number is 18, installs four rolls in every roll frame, the axis of four roll parts constitutes equilateral quadrangle, and the roll axis in the adjacent roll frame in front and back is mutual wrong 45 degrees, four motor mount pads of every roll machine shelf location, driving motor, transmission, roll, roll support bearing, roll position of axle are put hydraulic controller and are all installed on the motor mount pad, and driving motor passes through transmission and drives the roll rotation, the both ends of every roll set up roll support bearing respectively, and every roll support bearing connects a roll position of axle and puts hydraulic controller. The utility model discloses during the rolling not unidimensional hollow forging of four roll -type reducing mills, the frame of needn't changing planes as two roll -types or three -roll reducing mill, only need to change the roll can, roll diameter and frame thickness all very reduce, equipment volume ratio three -roll reducing mill reduces about 15%.
Description
Technical field
This utility model relates to roll seamless steel tube apparatus field, in particular, relates to the reducing mill of a kind of high-accuracy weldless steel tube.
Background technology
Seamless steel tube reducing process is the continuous rolling process of hollow cylinder not cored bar.At present, reducing mill work housing number is more, generally 9～24 framves.Reducing and rolling can reduce the hollow billet specification quantity of rolling process, instrument spare unit and pipe specification kind, expands the description that unit produces accordingly.
Reducing mill has micro-tension reducing and two kinds of forms of stretch reducing, and micro-tension reducing wall thickness in the operation of rolling increases, and the evenness of wall thickness on cross section is poor, and general total reducing rate controls 40%～50%；When rolling, there is tension force so that subtract wall while undergauge, can expand the specification limit of product in stretch reducing, the evenness of wall thickness of cross section is good compared with the situation of micro-tension reducing between frame.Reducing mill has two rollers or three-roller type, before and after dual roll type reducing rolling mill, adjacent rack roll axis hangs down 90 ° mutually, the roll axis of three-roller type reducing rolling mill wrong 60 ° mutually, the most hollow hollow forging all directions during reducing and rolling are all radially compressed, until it reaches the outside dimension of finished product requirement and transverse shape.
In existing two conventional rollers or the triple-roller diameter reducer rolling seamless steel pipe operation of rolling, due to exist bottom roll pass and the linear velocity of opening part is different, bottom pass opening part metal flow resistance and pass between there are differences, cause metal while longitudinal flow, metal bottom roll pass flows to opening part, occur that metal is pressed against at roll gap, form the wall unevenness of hollow forging.
Modern industry is proposed the highest dimensional accuracy and surface quality requirements to petroleum pipeline, boiler tube and various frame for movement pipe, but use conventional reducing mill rolling to need complicated technique and mode of operation, cause higher production cost, so needing the structure of existing reducing mill is improved, thus improve tube reducing precision and surface quality, and reduce adjustment operation easier.
Utility model content
Technical problem to be solved in the utility model is, overcomes above-mentioned the deficiencies in the prior art, it is provided that four roller reducing mills of a kind of high-accuracy weldless steel tube.
Four roller reducing mills of this utility model high-accuracy weldless steel tube, it is achieved by the following technical solutions: work housing number is 18 framves, four rolls are installed on each roll stand, the axis of described four roll parts constitutes equilateral tetragon, the front and back roll axis in adjacent rollers frame wrong 45 degree mutually；Four motor mounts are installed on each roll stand, drive motor, actuating device, roll, roll support bearing, roll mandrel position fluid pressure governor to be all arranged on motor mount, drive motor to drive roll rotation by actuating device；The two ends of each roll are respectively provided with roll support bearing, and each roll support bearing connects a roll mandrel position fluid pressure governor.
Described roll stand is the overall structure being processed and formed at one time.
Described actuating device uses crown-shaved gear shaft coupling.
This utility model has the advantages that
Reducing mill of the present utility model uses four-roller type, and work housing number is 18 framves, front and back adjacent rack roll axis wrong 45 degree mutually；Micro-tension reducing rolls, and total reducing rate is limited in 48%.
(1) little than three rollers or dual roll type size-reducing mill of the speed difference of the roll pass periphery of four-roller type reducing mill, the relative slip between roll with hollow forging can be reduced, and roll pass is less with the contact arc length of hollow forging, the radial force ratio making contact portion is more uniform, so that metal deformation flow state eases up, reduce circumference wall unevenness；
(2) adjacent rack roll axis wrong 45 ° of layouts mutually before and after four-roller type reducing mill, simplify rolling mill structure, convenient installation；
(3) four-roller type reducing mill is compared with three-roller type reducing mill, dual roll type reducing mill, and the rolling reduction of single roller is less, and hollow forging performance of nipping is good, and metal loss is less；
(4) four rolls of each frame of four-roller type reducing mill are driven by gear-box and clutch by 1 ac variable frequency speed regulation motor respectively.During rolling products of different specifications, roll need to be converted, adjust motor speed, set rational roll gap and roller declination angle, it is thus achieved that meet the parameter of technological requirement；
(5) mode that is operated alone is used, convenient " free rolling " adjusting roll gap and realizing each roll, the beneficially independent control of roll-force, mill speed, drafts, it is ensured that high precision rolling；
(6) when four-roller type reducing mill rolls various sizes of hollow forging, it is not necessary to frame of changing planes as dual roll type or three-roller type reducing mill, only need to change roll, roller diameter and frame thickness and all greatly reduce, equipment volume reduces about 15% than three-roller type reducing mill.
Accompanying drawing explanation
Fig. 1 is each rack construction front view in this utility model.
Detailed description of the invention
Below in conjunction with the accompanying drawings this utility model is described further.
Utility model works frame number is 18 framves, as it is shown in figure 1, be provided with four rolls 2 on each roll stand 1, the axis of described four roll parts constitutes equilateral tetragon, the front and back roll axis in adjacent rollers frame wrong 45 degree mutually；Four motor mounts 5 are installed on each roll stand 1, drive motor 3, actuating device 4, roll 2, roll support bearing 6 and roll mandrel position fluid pressure governor 7 to be all arranged on motor mount 5, drive motor 3 to drive roll 2 to rotate by actuating device 4；The two ends of each roll are respectively provided with roll support bearing 6, and each roll support bearing 6 connects a roll mandrel position fluid pressure governor 7.
This reducing mill uses 18 frames, four rolls of every frame, and each roll is driven by gear-box and clutch by 1 ac variable frequency speed regulation motor respectively, can change frame in groups.
Respectively roll the speed of roll drive motor and roll gap and the gradient of roll by conversion, can be combined out and meet the speed of technological requirement and drafts and contact length, and obtain the product of high dimensional accuracy.
The roll stand 1 of the present embodiment is overall structure, is processed and formed at one time, and rigidity is big.Four motor mounts 5 are directly installed on roll stand 1, and making four parts is a reference for installation, reduces alignment error, can guarantee that axiality and the concentricity of centrage that four motor mounts are constituted and the centrage of roll stand 1.Driving motor 3, actuating device (shaft coupling) 4, roll 2, roll support bearing 6, roll mandrel position fluid pressure governor 7 etc. to be arranged on motor mount 5, overall performance can be secure.
Ensure the rational in infrastructure of reducing mill, improve location and installation precision, simplify manufacturing process, reduce manufacturing cost.
Ingredient each to this utility model elaborates below:
Driving motor:
Driving motor to use pipe ventilated methods for cooling, superpower cooling prevents motor overheating；Motor overload coefficient is less than 2.5 times, and time constant is 2 seconds, with the dynamic process of limited rolling process.
Motor mount:
Frame-type support is the welding structural element based on steel plate, and postwelding machines, and has that installation and debugging are convenient, installation and maintenance are simple, lightweight, the feature of good rigidly.
Shaft coupling and driveline etc. are assembled on it.
Actuating device:
Due to the dimension constraint by reducing mill and motor, use the connected mode that motor shaft centrage is concentric with reductor power shaft centrage.Owing to transmission moment of torsion is relatively big and rotating speed is higher, employing crown-shaved gear shaft coupling, decelerator be the Hardened gear face angular gear of three grades of transmissions, gear housing be cast steel material.
Roll stand:
Reducing mill require roll stand rigidity is big, spacing is little, process and assemble is simple, easy to maintenance.Frame uses the outer kind of drive, is conducive to reducing frame spacing, raising housing rigidity and adapted breed many.Meanwhile, shorter frame spacing can reduce crop loss.
The safety guard of the operation of rolling:
In order to protect motor and speed reducer not damage in the case of accident, after the output shaft of reductor, install safety precautions additional.When moment is more than safe allowable value, the safety pin of shaft coupling is cut off, and moment is not delivered in reductor.
The parameter of specific embodiment is as follows:
18 frame reducing mills use driven separately form
Maximum total reducing rate: 48%
Single chassis maximum reducing rate: 3.5%
The rolling material being suitable for: steel alloy, rustless steel, carbon steel
Entrance hollow billet diameter (mm) of hollow forging: 175～200
Entrance hollow billet wall thickness (mm) of hollow forging: 4.5～13.5
Entrance hollow billet length (m) of hollow forging: 7.0～24
The entrance velocity (m/s) of hollow forging: 0.6～0.85
The diameter of steel tube (mm) of outlet: 130～170
The thickness of steel pipe (mm) of outlet: 5.0～14
Steel pipe length (m) of outlet: 8～85
The nominal diameter (mm) of roll: 500
Frame spacing (mm): 450
Maximum rolling force (kN): 350～600
Maximum rolling force square (KNm): 38
Main driving motor quantity (platform): 72
Power (kw): 240
Rotating speed (r/min): 1028/1800
Unit maximum mean tension coefficient: 0.35
Roll stand driving type: outer transmission
Rolling temperature DEG C: 850～950
Above an embodiment of the present utility model is described in detail, but described content has been only preferred embodiment of the present utility model, it is impossible to be regarded as being limited to practical range of the present utility model.All impartial changes made according to this utility model application range and improvement etc., within all should belonging to patent covering scope of the present utility model.
Claims (3)
1. four roller reducing mills of a high-accuracy weldless steel tube, it is characterized in that: work housing number is 18 framves, being provided with four rolls on each roll stand, the axis of described four roll parts constitutes equilateral tetragon, the front and back roll axis in adjacent rollers frame wrong 45 degree mutually；Four motor mounts are installed on each roll stand, drive motor, actuating device, roll, roll support bearing, roll mandrel position fluid pressure governor to be all arranged on motor mount, drive motor to drive roll rotation by actuating device；The two ends of each roll are respectively provided with roll support bearing, and each roll support bearing connects a roll mandrel position fluid pressure governor.
Four roller reducing mills of high-accuracy weldless steel tube the most according to claim 1, is characterized in that: described roll stand is the overall structure being processed and formed at one time.
Four roller reducing mills of high-accuracy weldless steel tube the most according to claim 1, is characterized in that: described actuating device uses crown-shaved gear shaft coupling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620242841.8U CN205463616U (en) | 2016-03-28 | 2016-03-28 | High accuracy seamless steel pipe's four roller reducing mills |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620242841.8U CN205463616U (en) | 2016-03-28 | 2016-03-28 | High accuracy seamless steel pipe's four roller reducing mills |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205463616U true CN205463616U (en) | 2016-08-17 |
Family
ID=56647834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620242841.8U Expired - Fee Related CN205463616U (en) | 2016-03-28 | 2016-03-28 | High accuracy seamless steel pipe's four roller reducing mills |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205463616U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105618484A (en) * | 2016-03-28 | 2016-06-01 | 天津商业大学 | Four-roll reducing mill of high-precision seamless steel pipe |
| CN109877160A (en) * | 2019-04-09 | 2019-06-14 | 浙江鼎尚不锈钢有限公司 | Four roller reducing mills of high-accuracy weldless steel tube |
| CN111589868A (en) * | 2020-06-01 | 2020-08-28 | 成都益世研电工设备有限公司 | Thin-wall metal pipe reducing equipment convenient to disassemble and assemble |
| CN113223783A (en) * | 2020-01-21 | 2021-08-06 | 上海必达意线材设备有限公司 | Diameter reducing device for producing smooth aluminum sheath high-voltage cable |
-
2016
- 2016-03-28 CN CN201620242841.8U patent/CN205463616U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105618484A (en) * | 2016-03-28 | 2016-06-01 | 天津商业大学 | Four-roll reducing mill of high-precision seamless steel pipe |
| CN109877160A (en) * | 2019-04-09 | 2019-06-14 | 浙江鼎尚不锈钢有限公司 | Four roller reducing mills of high-accuracy weldless steel tube |
| CN113223783A (en) * | 2020-01-21 | 2021-08-06 | 上海必达意线材设备有限公司 | Diameter reducing device for producing smooth aluminum sheath high-voltage cable |
| CN113223783B (en) * | 2020-01-21 | 2022-08-30 | 上海必达意线材设备有限公司 | Diameter reducing device for producing smooth aluminum sheath high-voltage cable |
| CN111589868A (en) * | 2020-06-01 | 2020-08-28 | 成都益世研电工设备有限公司 | Thin-wall metal pipe reducing equipment convenient to disassemble and assemble |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160817 Termination date: 20170328 |