CN201186385Y - Double machine frame oblique hot rolling minor diameter seamless steel pipe equipment - Google Patents
Double machine frame oblique hot rolling minor diameter seamless steel pipe equipment Download PDFInfo
- Publication number
- CN201186385Y CN201186385Y CNU2008200702362U CN200820070236U CN201186385Y CN 201186385 Y CN201186385 Y CN 201186385Y CN U2008200702362 U CNU2008200702362 U CN U2008200702362U CN 200820070236 U CN200820070236 U CN 200820070236U CN 201186385 Y CN201186385 Y CN 201186385Y
- Authority
- CN
- China
- Prior art keywords
- roll
- milling train
- reducing
- wall
- electric furnace
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The utility model discloses a seamless steel pipe device with small diameter whose two frames are obliquely hot-rolled, which mainly comprises a mandril carriage (1), a mandrel (3), an induction heating electric furnace (2a), a wall-reducing rolling mill (4a), a secondary induction heating electric furnace (2b), a stretch-reducing wall-increasing rolling mill (4b), cooling beds (10a) (10b), a leveler (11), a cutting machine (12), an on-line testing equipment (13) and a master control cabinet (9), wherein the front portion of the mandril is in a cone shape, the inner is a hollow recirculated water cooling structure which is connected with the mandrel carriage, heating channels of the induction heating electric furnace and the secondary induction heating electric furnace are run-through structures, both rolls of the wall-reducing rolling mill and the stretch-reducing wall-increasing rolling mill are reducing rolls, each roll is respectively connected with a rolling mill gear frame and rotates with the frame, the structure of each roll are same, and the inners are all the hollow recirculated water cooling structures. The device realizes the techniques of simultaneously heating, rolling and cooling and the technique of the roll, and enables the precision of the rolled steel pipe to be high. The utility model has the advantages of effectively reducing the cost, saving energy and reducing the pollution.
Description
Technical field
The utility model belongs to the rolling equipment technical field of steel pipe, and what relate generally to is a kind of two-stand angularly hot rolling minor diameter seamless steel tube equipment.Be particularly useful for the production of high accuracy minor diameter thick-walled seamless steel pipes.
Background technology
Minor diameter seamless steel tube consumption in every field such as production, life is all very big.The production of current minor diameter seamless steel tube is mainly formed by cold-drawn (rolling), will repeatedly take the lead in process of production, cold-drawn, pickling; And produce that the minor diameter seamless steel tube operation is many, cost is high, seriously polluted, waste manyly, exist that effect is slow, energy consumption is big, lumber recovery is low, seriously polluted, problem that environmental protection pressure is big.The resistance to deformation power of ferrous materials itself in addition, the raw material material scope that makes cold-drawn (rolling) to process is rather narrow etc., the energy and resource had so both been wasted greatly, and for a lot of minor diameter thick walled steel tubes, influenced by the mechanical property of material, thereby some material can only be utilized machining that round steel is bored bore hole and obtain the higher minor diameter thick walled steel tube of precision, the expense of taking a lot of work like that especially material, cost is very high, and existing technology is difficult to the high minor diameter thick-walled seamless steel pipes of machining accuracy, so the processing of minor diameter thick walled steel tube still is a technical barrier so far.
The technology of tradition hot rolled seamless steel tube is to adopt the heating back rolling, at the surface cool roll of roll, rollingly cools off plug after finishing a steel pipe in the operation of rolling.Promptly earlier hollow forging is heated certain hour, hollow forging is exported electric furnace after making hollow forging temperature in the electric furnace reach about 1100 degree with electric furnace; Penetrate cooled plug in the hollow forging and send into milling train; In the operation of rolling, limit rolled steel tube edge water cooling roll outside, the water of cooling roll can flow on the just rolling steel pipe simultaneously, and then also cooling pipe, influences the rolling temperature of steel pipe.After a steel pipe rolling was finished, the extraction plug was placed in the tank and cools off.The problem that this technology exists mainly contains: 1, the heating back is rolling, can cause the rolling end temperature difference in earlier rolling end of steel pipe and back big (particularly when the limit rolled edge waters the water cooling roll, the water of cooling roll can flow on the just rolling steel pipe simultaneously, also cooled off just at rolling steel pipe simultaneously, cause the steel pipe cooling rate very fast), the internal stress difference of steel pipe is also bigger, and the steel pipe two external diameter, internal diameter, the wall thickness that roll out are all inhomogeneous, also need sizing mill to carry out sizing, Jun Bi; Complex process is loaded down with trivial details.2, the cooling roll just can cool off simultaneously at rolling steel pipe in the operation of rolling, makes that the steel pipe cooling rate is too fast, and rolled steel tube tube reducing significantly subtracts wall; Want to reach the tube reducing that needs and subtract the wall requirement, need carry out repeatedly rolling.Not only increase rolling cost, and increase equipment investment, the complicated loaded down with trivial details rolling mill practice of increase.3, existing its roll of oblique milling equipment is cylindrical, and progressively reducing is rolling generally to need to adopt multimachine frame (three more than the frame), is mainly used in rolling middle seamless large-diameter pipes, the seamless steel pipe that general rolling 76mm is above.Multimachine frame required power height, equipment investment is many, the cost height.4, existing cross roll equipment of hot rolling does not add mandrel rolling and can only increase the wall tube reducing, and can not subtract the wall tube reducing.And in rolling, do not add plug, inner wall coarse, fineness is poor, and precision is low, and tolerance is big.A bit still can use for the seamless large-diameter pipes tolerance is big, for minor diameter seamless steel tube, tolerance is big, just can not adapt to the requirement in market, and the seamless steel pipe of being produced does not have practicality.
Because the roll of existing rolling equipment mostly is solid construction greatly, this roll can only be that the outside is cooled off when cooling, and in cooling roll outside, also the steel pipe that is rolled is cooled off, reduced the temperature that is rolled steel pipe thus, make the internal stress difference of steel pipe also bigger, the steel pipe two external diameter, internal diameter, the wall thickness that roll out are all inhomogeneous, also need sizing mill to carry out sizing, Jun Bi, not only increase rolling cost, and increase equipment investment, the complicated loaded down with trivial details rolling mill practice of increase.
Summary of the invention
The purpose of this utility model promptly produces thus, and a kind of two-stand angularly hot rolling minor diameter seamless steel tube equipment is provided.Make its steel pipe precision height that rolls out, effectively increase work efficiency, simplify production technology, reduce production costs, and energy savings, reduce to pollute.
The technical scheme that the utility model is taked for achieving the above object is: its mainly by mandrel trolley, plug, eddy-current heating electric furnace, subtract wall milling train, post bake electric induction furnace, stretch reducing and increase wall milling train, cold bed, straightener, cutting machine, online detection instrument and main control cabinet and form.Mandrel trolley moves back and forth along guide rail, an end of plug and mandrel trolley is fixed and with the same moved further of mandrel trolley, the front portion of plug is a conical in shape, inside is hollow recirculated water cooling structure, it is provided with water inlet and delivery port; The eddy-current heating electric furnace is at mandrel trolley and subtract between the wall milling train, and its heat tunnel is through structure; The roll that subtracts the wall milling train is made up of three reducing rolls, and each roll is connected with the milling train gear frame respectively and rotates thereupon, and the structure of each roll is identical, and inside is hollow recirculated water cooling structure, which is provided with water inlet and delivery port; Secondary eddy-current heating electric furnace increases between the wall milling train subtracting wall milling train and stretch reducing, its heat tunnel also is through structure, stretch reducing increases the roll of wall milling train and also is made up of three reducing rolls, each roll is connected with the milling train gear frame respectively and rotates thereupon, the structure of each roll is identical, inside is hollow recirculated water cooling structure, which is provided with water inlet and delivery port.
Heating means and the cooling of the structure of plug, roll and plug, roll of the utility model by improving heating furnace realized the limit heating, the limit is rolling and the technology of limit heating, limit cooling plug and roll.Heating is adopted the middle frequency furnace heating by rolling the changing into of traditional gas burner or electric furnace heating back, can accomplish that the limit heating edge is rolling.By the plug and the roll type of cooling are become the inner loop water cooling by traditional external refrigeration.The internal structure of plug, roll adopts hollow recirculated water cooling structure, and the external structure of roll adopts the reducing roll.Therefore can realize increasing the wall tube reducing is rolling heavy wall minor diameter seamless steel tube; Can subtract the wall tube reducing again is the rolling thin-wall minor diameter seamless steel tube.When rolling thick-walled seamless steel pipes, only need once heating, as long as a frame just can roll out high-precision minor diameter thick-walled seamless steel pipes.When the rolling thin-wall minor diameter seamless steel tube, adopt twice heating, two frames to be rolled, last frame is for subtracting the wall milling train, and it is rolling to subtract wall, and a back frame is the tube reducing milling train, and carrying out stretch reducing, to increase wall rolling.Reduce the equipment input thus, saved the energy, reduced cost.And when the cooling roll, can not influence just in rolling steel pipe temperature, the temperature at each position of the feasible steel pipe that is rolled is kept constant relatively, can not influence the most rational rolling temperature because cooling is too fast, thereby each position to steel pipe can both be rolled uniformly and effectively, guarantee external diameter, internal diameter, wall thickness, the ovality of fished pipe, the rolling accuracy of fineness, improved the precision of rolled steel tube.Owing to utilized medium-frequency induction furnace heating and subtracted the wall milling train and stretch reducing increases wall milling train and retained mandrel finishing endoporus process combined, by hydraulic way accurately adjust roll location and under the amount of rolling, utilize PLC control that two frame rotating speeds are carried out the Precision Stepless speed governing, thereby guarantee that technology is implemented, and be once-forming, guarantee to produce external diameter≤76mm, when s/d is 0.75～1.5 minor diameter thick-walled seamless steel pipes, also can produce the thin-walled minor diameter seamless steel tube.Effectively improve production efficiency, energy savings, minimizing and polluted, reduced production costs, improve product competitiveness.
Description of drawings
Fig. 1 is the schematic diagram of the utility model tube rolling unit.
Fig. 2 is the A-A profile of Fig. 1.
Fig. 3 is the vertical view of the utility model integral device.
Fig. 4 is the structural representation of the utility model plug.
Fig. 5 is the profile of the utility model eddy-current heating electric furnace heat tunnel.
Fig. 6 is the left view of Fig. 5.
Fig. 7 is the utility model roll structural representation.
Among the figure: 1, mandrel trolley; 2a, induction heating circle; 2b, post bake induction heating circle; 3, plug; 4a, subtract the wall milling train; 4b, stretch reducing increase the wall milling train; 5, roll; 6a, milling train gear frame; 6b, milling train gear frame; 7a, DC frequency-changing device; 7b, DC frequency-changing device; 8a, threephase asynchronous machine; 8b, threephase asynchronous machine; 9, main control cabinet; 10a, cold bed; 10b, cold bed; 11, straightener; 12, cutting machine; 13, online detection instrument; 14, baler; 15, tapered core caput; 16 cavity pull bars; 17 water cooling cavitys; 18, water inlet; 19, delivery port; 20, bearing cap; 21, induction heating pipe; 22, refractory material sealant; 23, hollow driving gear; 24, driven gear, 25, water inlet, 26, delivery port, 27, bearing cap; 28, hollow cooling chamber.
The specific embodiment
In conjunction with the accompanying drawings, it is as follows to provide embodiment of the present utility model:
As Fig. 1 in conjunction with shown in Figure 3: the equipment that present embodiment is realized above-mentioned process using mainly by mandrel trolley 1, plug 3, eddy-current heating electric furnace 2a, subtract wall milling train 4a, secondary eddy-current heating electric furnace 2b, stretch reducing increases wall milling train 4b, cold bed 10a, 10b, straightener 11, cutting machine 12, online detection instrument 13 and main control cabinet 9 and forms.Mandrel trolley 1 is the motion carrier of plug 3, and power is provided by air pump, moves back and forth on guide rail.The tail end of plug 3 is fixed on the mandrel trolley by chuck, and chuck is fixed by rolling bearing, and can carry out front and back adjustment to the position of plug by the PLC control system, to guarantee arts demand.The powered hollow forging that mandrel trolley utilizes air pump to provide before open rolling enters the eddy-current heating passage and heats, and pushes milling train subsequently and begins rolling; When rolling, when plug puts in place, mandrel trolley will automatically lock the position by the PLC control system and finish until a steel pipe rolling, return original position again and begin last second hollow forging, go round and begin again.
As shown in Figure 4: plug 3 is made up of tapered core caput 15, cavity pull bar 16, water-cooled cavity 17 and water inlet 18 and delivery port 19.The front portion of plug 3 is that tapered core caput 15, middle part are that cavity pull bar 16, rear portion are bearing cap 20.Inner is circulation hollow water-cooled cavity 17.The bearing cap 20 that its rear portion is connected with mandrel trolley is provided with water inlet 18 and delivery port 19.During use, the tail end of plug 3 is fixed on the mandrel trolley 1, plug penetrates in the hollow forging earlier, penetrate in the process of hollow forging at plug, when plug penetrated hollow forging arrival appointment rolling position, the draw-in groove on the mandrel trolley can block plug and move on, and plug advances jointly along with mandrel trolley promotes hollow forging then, the plug end promptly rests on rolling and serves as internal mold, cooperates with roll to carry out tube rolling.When rolling, cooling water is discharged by delivery port 19 by water-cooled cavity 17 backs that water inlet 18 enters plug, by ceaselessly cooling off plug, to guarantee plug operate as normal at high temperature, plug needs the instant problem of cooling off in medium-frequency induction furnace heating process thereby solved.After a steel pipe rolling was finished, plug was driven by mandrel trolley and extracts out, treats that next round is rolling.
The induction heating circle 2a of eddy-current heating electric furnace is at mandrel trolley and subtract between the wall milling train, and the eddy-current heating electric furnace adopts medium-frequency induction furnace, and electric current, power can be adjusted with the size of tube rolling diameter, wall thickness.Its heat tunnel adds refractory masses 22 sealings by induction heating pipe 21 and forms (as Fig. 5, shown in Figure 6), form a through heat tunnel, because refractory masses, make it can retain a part of heat, prevent the hollow forging touching induction coil accident that is short-circuited again.
Subtracting wall milling train 4a is made up of three rolls 5.The structure of each roll is identical, (as shown in Figure 7), the outside of roll 5 is that progressively the reducing ellipse is tapered, inner is that hollow cooling chamber 28 can carry out the cooling water circulation, water inlet 25 is arranged on the roll 5 bearing at end lid 27 with delivery port 26 and is communicated with the hollow cooling chamber of roll 5, bearing cap 27 seals, thereby has guaranteed that roll water-cooling system when rotary work is not influenced by it.Because roll 5 is progressively variable-diameter structure, hollow forging is to cooperate the attenuate inwall with plug 3, adjust eccentric, tube reducing on a small quantity when rolling at preceding half section; The aperture that the roll taper becomes between three rolls of ambassador when rolling in the second half section diminishes, and at this moment, hollow forging then separates with plug, carries out reducing and rolling significantly.Milling train transmission frame 6a is positioned at the discharging opening position that subtracts wall milling train 4a, frame is provided with a hollow driving gear 23 and three and is the equally distributed driven gear 24 of hexagonal angle (as shown in Figure 2), driving gear 23 and three driven gears 24 are connected with a joggle, and each driven gear is connected with roll 5 on subtracting wall milling train 4a by universal drive shaft respectively.The power that is provided by threephase asynchronous machine 8b drives 23 rotations of hollow driving gear through DC frequency-changing device 7a, drives three driven gears 24 that are connected with a joggle with it simultaneously and rotates thereupon, and drive roll 5 rotations by universal drive shaft.Be equipped with on the frame position that hydraulic means can breaker roll and under the amount of rolling carry out Precision trimming.
Secondary eddy-current heating electric furnace 2b increases between the wall milling train 4b at milling train transmission frame 6a and stretch reducing, because after the process phase I is rolling, temperature subtracts bigger, when hollow forging from subtracting after the wall milling train comes out, the hollow forging temperature has been lower than suitable rolling temperature, therefore rolling in order to carry out next round, hollow forging need be heated to 950～1150 ℃ once more.Its structure is identical with eddy-current heating electric furnace 2a.
Stretch reducing increases wall milling train 4b between secondary eddy-current heating electric furnace 2b cold bed 10a, 10b, and its structure and the kind of drive are with to subtract the wall milling train identical, and different is the cooperation that does not have the plug internal mold when rolling, be utilize tension force that steel pipe is carried out tube reducing to increase wall rolling.Cold bed 10a, 10b are positioned at the discharging opening position that stretch reducing increases the milling train gear frame 6b of wall milling train 4b, what it adopted is the laminar flow type of cooling, steel pipe is carried by the discharging roller-way and is gone up cold bed, carry out the laminar flow cooling, guarantee the mechanical property of steel pipe by adjusting cooling velocity, mode and cold bed transfer rate.Output at cold bed is followed successively by straightener 11, cutting machine 12 and online detection instrument 13.After steel pipe is through the cold bed cooling, be delivered to straightener by the finished product roller-way and carry out alignment, carry out scale or multiple length cutting through the steel pipe after the alignment by cutting machine, after passing through online detection instrument (comprise flaw detection and hydrostatic testing machine) again the steel pipe behind the scale being detected, qualified steel pipe is by the baler bundling warehouse-in of weighing.Main control cabinet 9 (adopting the PLC control program) can be organized motor to each, decelerator is controlled separately, each group hydraulic adjustment device is adjusted separately, thereby guaranteed that technology can be able to perfect in fine setting.
During use, hollow forging is transferred to stock shelf by manipulator from the raw material district, by mandrel trolley 1 plug 3 is inserted in the hollow forgings and hollow forging is pushed induction heating circle 2a and be heated to about 1100 ℃, be pushed into again and subtract wall milling train 4a and begin to be rolled, by milling train cooperate with plug with waste tube wall roll thin, roll expansion, and suitably reduce waste external diameter of pipe.Mandrel trolley 1 proceeds to plug 3 when subtracting wall milling train tail end with hollow forging rolling always, hollow forging is from subtracting after wall milling train 4a comes out, because the plug position is limited, so also carrying out taking off rod when wall milling train 4a comes out from subtracting, this is heated to about 1100 ℃ again through post bake induction heating circle 2b, entering stretch reducing immediately increases wall milling train 4b and carries out reducing and rolling, enter cold bed 10a and carry out laminar flow cooling until rolling finishing, carry out alignment from entering straightener 11 after cold bed comes out, carry out scale or multiple length cutting with 12 pairs of steel pipes of cutting machine afterwards, detect by 13 pairs of pipe quality of online detection instrument again, enter baler 14 bundlings after qualified to get final product.
Claims (6)
1, a kind of two-stand angularly hot rolling minor diameter seamless steel tube equipment, mainly comprise mandrel trolley (1), plug (3), eddy-current heating electric furnace (2a), subtract wall milling train (4a), secondary eddy-current heating electric furnace (2b), stretch reducing increases wall milling train (4b), cold bed (10a) (10b), straightener (11), cutting machine (12), online detection instrument (13) and main control cabinet (9), mandrel trolley (1) moves back and forth along guide rail, one end of plug (3) and mandrel trolley is fixed and with the same moved further of mandrel trolley, it is characterized in that: the front portion of plug (3) is a conical in shape, inside is hollow recirculated water cooling structure, and it is provided with water inlet and delivery port; The eddy-current heating electric furnace is at mandrel trolley and subtract between the wall milling train, and its heat tunnel is through structure; The roll (5) that subtracts the wall milling train is the reducing roll, and each roll (5) is connected with milling train gear frame (6a) respectively and rotates thereupon, and the structure of each roll is identical, and inside is hollow recirculated water cooling structure, which is provided with water inlet and delivery port; Secondary eddy-current heating electric furnace increases between the wall milling train subtracting wall milling train and stretch reducing, and its heat tunnel also is through structure; The roll that stretch reducing increases the wall milling train also is the reducing roll, and each roll (5) connects with milling train gear frame (6b) respectively and to rotate the structure of each roll identical thereupon, and inside is hollow recirculated water cooling structure, which is provided with water inlet and delivery port.
2, two-stand angularly hot rolling minor diameter seamless steel tube equipment according to claim 1, it is characterized in that: described plug (3) is made up of tapered core caput (15), cavity pull bar (16), water-cooled cavity (17) and water inlet (18) and delivery port (19), the front portion of plug is that tapered core caput, middle part are that cavity pull bar, rear portion are bearing cap (20), inner be circulation hollow water-cooled cavity, water inlet and delivery port are arranged on conic mandrel bar back of head and the bearing cap that mandrel trolley is connected.
3, two-stand angularly hot rolling minor diameter seamless steel tube equipment according to claim 1 is characterized in that: the heat tunnel of described eddy-current heating electric furnace (2a) or post bake induction heater (2b) adds a through heat tunnel of refractory masses (22) sealing formation by induction heating pipe (21).
4, the equipment of the rolling mill practice of two frame hot rolling minor diameter seamless steel tubes according to claim 1 is characterized in that: the outside of described roll (5) is the progressively oval tapered structure of reducing, and inside is compound cavity structure.
5, according to claim 1 or 4 described angularly hot rolling minor diameter seamless steel tube equipment, it is characterized in that: described roll (5) subtracts the roll (5) of wall milling train and stretch reducing, and to increase wall milling train (4b) be that roll (5) is three and is 120 ° and evenly distributes and assemble at axioversion.
6, two-stand angularly hot rolling minor diameter seamless steel tube equipment according to claim 1, it is characterized in that: describedly subtract wall milling train (4a) or stretch reducing to increase the milling train gear frame (6a) of wall milling train (4b) or milling train gear frame (6b) be to be provided with a hollow driving gear (23) and three to be the driven gears (24) that hexagonal angle distributes on frame, hollow driving gear (23) and three driven gears (24) are connected with a joggle, each driven gear respectively by universal drive shaft with subtract the roll (5) that wall milling train (4a) or stretch reducing increase on the wall milling train (4b) and be connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200702362U CN201186385Y (en) | 2008-04-28 | 2008-04-28 | Double machine frame oblique hot rolling minor diameter seamless steel pipe equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200702362U CN201186385Y (en) | 2008-04-28 | 2008-04-28 | Double machine frame oblique hot rolling minor diameter seamless steel pipe equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201186385Y true CN201186385Y (en) | 2009-01-28 |
Family
ID=40309401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200702362U Expired - Fee Related CN201186385Y (en) | 2008-04-28 | 2008-04-28 | Double machine frame oblique hot rolling minor diameter seamless steel pipe equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201186385Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102489516A (en) * | 2011-11-29 | 2012-06-13 | 洛阳璋泰非标机械有限公司 | Process and equipment for hot rolling extra-small diameter seamless steel pipe with fixed mandrel |
| CN116393504A (en) * | 2022-12-29 | 2023-07-07 | 陕西天成航空材料有限公司 | Small-size bar tissue optimizing rolling equipment |
| CN116393515A (en) * | 2023-06-09 | 2023-07-07 | 太原理工大学 | Continuous rolling equipment and method for thermal controllable interface of seamless metal composite pipe |
-
2008
- 2008-04-28 CN CNU2008200702362U patent/CN201186385Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102489516A (en) * | 2011-11-29 | 2012-06-13 | 洛阳璋泰非标机械有限公司 | Process and equipment for hot rolling extra-small diameter seamless steel pipe with fixed mandrel |
| CN116393504A (en) * | 2022-12-29 | 2023-07-07 | 陕西天成航空材料有限公司 | Small-size bar tissue optimizing rolling equipment |
| CN116393515A (en) * | 2023-06-09 | 2023-07-07 | 太原理工大学 | Continuous rolling equipment and method for thermal controllable interface of seamless metal composite pipe |
| CN116393515B (en) * | 2023-06-09 | 2023-08-04 | 太原理工大学 | Continuous rolling equipment and method for thermal controllable interface of seamless metal composite pipe |
| US11911840B1 (en) | 2023-06-09 | 2024-02-27 | Taiyuan University Of Technology | Continuous rolling device and method continuous rolling device and method with interfacial temperature-force controllability for seamless metal cladding pipe |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100595027C (en) | Two-stand angularly hot rolling minor diameter seamless steel tube rolling technique and equipment thereof | |
| CN101259588A (en) | Fewer stands longitudinal hot rolling minor diameter thin wall seamless steel tube rolling technique and equipment thereof | |
| CN101352728A (en) | Novel technique for producing large-sized seamless steel pipe | |
| CN108160709B (en) | Titanium alloy hot-rolled seamless pipe production system and production process thereof | |
| CN101020190A (en) | Hot rolling process of seamless steel pipe | |
| CN103272845B (en) | Hot rolling process of small-bore ultra-thin-wall seamless steel tube | |
| CN106216399B (en) | A kind of method of double-core axle joint milling train production hot rolled seamless steel tube | |
| CN101337236A (en) | Rolling mill technique of three-roller full-floating core rod tandem rolling tube | |
| CN105568195A (en) | Preparation method for high-accuracy and high-strength titanium alloy seamless tubes | |
| CN105328091A (en) | Large-modulus cylindrical gear near net hot-rolling shaping device | |
| CN102489516A (en) | Process and equipment for hot rolling extra-small diameter seamless steel pipe with fixed mandrel | |
| CN201751022U (en) | Equipment for forming hollow anchor rods at one step by reducing hot rolling | |
| CN201186385Y (en) | Double machine frame oblique hot rolling minor diameter seamless steel pipe equipment | |
| CN201186288Y (en) | Complex cavity water cooling reducing roller | |
| CN104475453B (en) | A kind of tandem rolling roll seamless steel tube technique and device | |
| CN206356379U (en) | Pipe head rolls reducing device | |
| CN101020191A (en) | Hot rolling process of seamless steel pipe | |
| CN106825106A (en) | The technique of thin-walled hot rolled seamless steel tube in a kind of double-core axle two-roller skew-rolling production | |
| CN101020192A (en) | Hot rolling process of seamless steel pipe | |
| CN102233355A (en) | Technological process for adding retained mandrel to reducing rolling section of hot-rolled small-diameter seamless steel tube | |
| CN204503756U (en) | A kind of roll seamless steel tube system | |
| CN104475451A (en) | Rolling system of seamless steel tube and rolling technology thereof | |
| CN203750993U (en) | Integrated inclined and longitudinal rolling anchor rod rolling mill | |
| CN201192774Y (en) | Equipment for longitudinally hot-rolling small diameter thin wall seamless steel pipe with fewer stands | |
| CN101954377A (en) | Full-floating mandrel tandem-rolling seamless steel pipe production process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20150213 Granted publication date: 20090128 |
|
| RINS | Preservation of patent right or utility model and its discharge | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20150813 Granted publication date: 20090128 |
|
| RINS | Preservation of patent right or utility model and its discharge | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20151009 Granted publication date: 20090128 |
|
| RINS | Preservation of patent right or utility model and its discharge | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20160409 Granted publication date: 20090128 |
|
| RINS | Preservation of patent right or utility model and its discharge | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090128 Termination date: 20150428 |
|
| EXPY | Termination of patent right or utility model |