CN206747279U - A kind of heater for rolling molybdenum alloy pipe - Google Patents
A kind of heater for rolling molybdenum alloy pipe Download PDFInfo
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- CN206747279U CN206747279U CN201720314738.4U CN201720314738U CN206747279U CN 206747279 U CN206747279 U CN 206747279U CN 201720314738 U CN201720314738 U CN 201720314738U CN 206747279 U CN206747279 U CN 206747279U
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- pipe
- heater
- tube wall
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Abstract
A kind of heater for rolling molybdenum alloy pipe, including two structure identical primary heaters and secondary heater；Two heaters include cylindric body, body includes three-layer pipe wall, the cavity for accommodating coolant is formed between outermost layer tube wall and intermediate layer tube wall, the cavity for accommodating hydrogen is formed between intermediate layer tube wall and most inner side tube wall, most inner side tube wall, which is provided with, is uniformly distributed and inside hydrogen nozzle；One end of body is provided with hydrogen inlet, coolant inlet and cooling liquid outlet, and the other end of body is provided with flange；Primary heater by provided with flange be connected with the feed end of pipe mill frame, secondary heater by provided with flange be connected with the discharge end of pipe mill frame.The present apparatus enhances the uniformity of billet production regional temperature, improves the uniformity and yield rate of shaping pipe wall thickness, improves the dimensional accuracy and surface quality of shaping pipe.
Description
Technical field
The utility model belongs to metal working technical area, and in particular to a kind of heating for rolling molybdenum alloy pipe fills
Put.
Background technology
The fusing point of metal molybdenum is 2623 DEG C, and its alloy material has high-melting-point, high intensity, inductile feature, therefore, profit
Target is processed with molybdenum alloy material plastic deformation characteristic, is typically chosen band warm working.
At present, traditional molybdenum alloy thin-wall pipes that prepare are completed on Kind of Warm Rolled Pipe machine equipment, its servo-actuated mode of heating
It is divided to two kinds：1. the servo-actuated heating of high frequency.Its operation principle is as schemed（1）It is shown, including frame, roll, high frequency coil, core rod and tube
Base.A pair roller and one group of high frequency coil are also secured in frame, and do horizontal reciprocating movement with frame, and roll is fixed on machine
Frame center simultaneously compresses pipe upper and lower surface, and high frequency coil is distributed in the import and export end of frame, when frame moves to the left or right,
Pipe passes through high frequency coil, and because of electromagnetic induction principle, pipe is heated rapidly to rolling temperature, extruding of the pipe in roll and plug
Power lower wall thickness and external diameter change, so as to realize the roll forming of pipe.2. the servo-actuated heating of flame.Its operation principle and high frequency
Servo-actuated heating is similar, simply changes high frequency heating coil into flame gun injection outer surface of tube blank heating, when pipe reaches rolling temperature
When spending, the roll forming of pipe is completed.
Above two mode of heating can all complete the heating of molybdenum alloy pipe and the shaping of pipe is completed under rolling temperature
Processing, still, they are all uneven in the presence of heating, and so as to cause shaping pipe wall unevenness, or even showing for tubing cracking occur
As so that the yield rate of tubing is greatly reduced, while due to the presence of air in rolling machine frame, occurs under high temperature with molybdenum alloy
Oxidation reaction, tube surfaces oxidation and the loss of molybdenum are caused, and produce a large amount of flue gases and bring influence to working environment, and
The servo-actuated heating of high frequency is even more complicated, and being servo-actuated volume increases, with noise and vibration in running, the heat to thin-wall pipes
Roll process brings many uncertain factors, while influences the physical and mental health of site operation personnel.
The content of the invention
For insufficient existing for above-mentioned prior art, the utility model provides a kind of heating for rolling molybdenum alloy pipe
Device.
The utility model is achieved through the following technical solutions.
A kind of heater for rolling molybdenum alloy pipe, it is characterised in that it is identical that described device includes two structures
Primary heater and secondary heater；Described two heaters include hollow cylindric body, and the body includes three
Layer tube wall, forms the cavity for accommodating coolant, intermediate layer tube wall and innermost layer between outermost layer tube wall and intermediate layer tube wall
Form the cavity for accommodating hydrogen between tube wall, innermost layer tube wall, which is provided with, to be uniformly distributed and inside hydrogen nozzle；It is described
One end of body is provided with hydrogen inlet, coolant inlet and cooling liquid outlet, and the other end of the body is provided with flange；It is described
Primary heater by provided with flange be connected with the feed end of pipe mill frame, the secondary heater by provided with flange
It is connected with the discharge end of pipe mill frame.
According to above-mentioned heater, it is characterised in that described device also includes two structure identical sleeves, and described two
One end of sleeve is socketed with the free splaying of two heaters respectively, and the other end of two sleeve, which is separately fixed at, to be arranged on
On the support of frame both sides.
Compared with traditional servo-actuated mode of heating, device and method of the present utility model has advantages below：
（1）Heater of the present utility model is cylinder-like structure, and its inner surface is evenly equipped with flame-thrower nozzle, ensure that molybdenum alloy
Pipe is that region is heated by hot mode, avoid pipe surface because single-point is heated or single line is heated and cause billet production region by
It is hot uneven, reduce tubular object extruding and ftractureed phenomenon, improve billet production lumber recovery, improve tubing dimensional accuracy and
Surface quality, and heater is simply light, it is rational in infrastructure, considerably reduce the running noises in the frame operation of rolling and shake
It is dynamic, it ensure that the safety and stability in pipe process.
（2）The utility model improves the surface quality of roll forming tubing, improves the uniformity of tube wall thickness.Reduce
Cracking situation of the pipe during roll forming, greatly improved the yield rate of tubing, and ensure that the steady of tubing composition
It is qualitative.The servo-actuated heating of traditional high frequency or the servo-actuated heating of flame, frame working space is semi open model structure, and air is largely deposited
When molybdenum alloy pipe surface is heated to more than 550 DEG C, the oxygen in the molybdenum and air on pipe surface aoxidizes
Reaction, causes shaping pipe surface oxidation, causes the loss of molybdenum amount in pipe, simultaneously because it gives the region of heating of pipe blank
It is heated to put heated or face, so that billet production region uneven heating is even, its metal fluidity will be variant, works as plug
In the common extrusion tube blank of roll, during outer wall, easily cause the even situation of wall unevenness or even ftracture, reduce pipe finished
Rate.
（3）The utility model eliminates the live smoke pollution problem of rolling, improves the working environment of operating personnel, favorably
In the physical and mental health of Field Force.Traditional servo-actuated heating, due to the presence of molybdenum alloy pipe heat affected zone air, when pipe table
When face is heated to more than 550 DEG C, oxidation reaction occurs for the oxygen in the molybdenum and air on pipe surface, and generation is volatile
Molybdenum trioxide, as temperature raises, molybdenum and oxygen reaction are more violent, and molybdenum trioxide, steam and greasy dirt etc. are mingled in one
Rise and form a large amount of flue gases, cause working site equipment and the pollution of personnel.And piston type of the present utility model is servo-actuated heater,
In heating exhaust, constant temperature rolling and cooling exhaust phase, complete in molybdenum alloy thin-wall pipes preparation process, it is from heater
Only air and water vapour have been discharged in gap between sleeve, eliminate the smoke pollution problem at tradition rolling scene, improve
Human-machine operation environment.
（4）Heater of the present utility model, in the preparation process of molybdenum alloy thin-wall pipes, realize heating row
The serialization operation of gas technique, constant temperature rolling mill practice and the exhaust air technique that cools.Compared with traditional servo-actuated heater, enhance
The uniformity of billet production regional temperature, the uniformity and yield rate of shaping pipe wall thickness are improved, improves shaping pipe
Dimensional accuracy and surface quality, simultaneously because only air and water vapour have been discharged in the gap between heater and sleeve, disappear
Except the smoke pollution problem at tradition rolling scene, human-machine operation environment is improved.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation of the utility model heater.
Fig. 3 is the side view of the utility model heater.
Fig. 4 is the structural representation of prior art.
Embodiment
The utility model is described in detail with reference to the accompanying drawings and detailed description.
As shown in figures 1 and 3, a kind of heater for rolling molybdenum alloy pipe, including two structure identicals
One heater 1 and secondary heater 2, two structure identical sleeves 3, sleeves 4；Two heaters include hollow cylindrical shape
Body 5, body include three-layer pipe wall, the cavity 8 for accommodating coolant are formed between outermost layer tube wall 6 and intermediate layer tube wall 7,
The cavity 10 for accommodating hydrogen is formed between intermediate layer tube wall and innermost layer tube wall 9, innermost layer tube wall is provided with and is uniformly distributed simultaneously
And inside hydrogen nozzle 11；One end of body is provided with hydrogen inlet 12, coolant inlet 13 and cooling liquid outlet 14, hydrogen
Entrance connects with the cavity for accommodating hydrogen, and hydrogen inlet is used to be connected with Hydrogen Line, and Hydrogen Line is provided with hydrogen control
Valve processed, coolant inlet and cooling liquid outlet connect with the cavity for accommodating coolant respectively, coolant inlet be used for
Coolant feed liquid pipeline connects；The other end of body is provided with flange 15；Primary heater by provided with flange and pipe mill machine
Frame 16 feed end connection, secondary heater by provided with flange be connected with the discharge end of pipe mill frame；Tube-in-tube structure is
Hollow cylinder, the free splaying socket with two heaters, the other end of two sleeves are solid respectively respectively for one end of two sleeves
It is scheduled on the support 17 and support 18 for being arranged on frame both sides.
The operation method comprises the following steps：
（1）Heat exhaust phase：Pipe 19 through plug 20 enter the heating region in two heaters when, open hydrogen
Air valve is simultaneously lighted, and keeps the high gaseity that hydrogen flowing quantity is 13L/min ~ 18L/min, the time is 3min ~ 5min, fully to fire
Burn the air between heater and pipe surface, prevent molybdenum alloy pipe surface from being aoxidized more than 550 DEG C, at the same hydrogen with
The vapor of oxygen combustion generation is discharged along the ventilation gap between heater and sleeve；
（2）Constant temperature rolling sequence：When the temperature of heating region in heater is risen into 850 DEG C ~ 900 DEG C, frame, which drives, rolls
Roller 21 and heater are slowly plastically deformed to left movement, heated pipe in the effect of the extruding force of plug and roll, its wall thickness
Changed with external diameter, complete the machine-shaping of pipe, while pipe is sent into the left, hydrogen and oxygen reaction into vapor
And unnecessary air is discharged along the ventilation gap between heater and sleeve.Now, it is 13L/min ~ 18L/ to keep hydrogen flowing quantity
Min high gaseity, heater area temperature are 850 DEG C ~ 900 DEG C of temperature constant state, and roll horizontally advances speed along pipe surface
Spend for 500mm/min ~ 800mm/min.When frame moves to stroke terminal to the left, frame drive roll and heater quickly to
Right retrogressing completes pipe a time constant temperature operation of rolling to rolling original position；Now, high gas and the heating of hydrogen are still kept
The temperature constant state of device, the horizontal astern speed of roll are 300mm/s ~ 500mm/s；Then frame drive roll and heater continue to
Left movement, start the operation of rolling next time；
（3）Cool exhaust phase：According to step（2）Complete molybdenum alloy pipe roll forming, when pipe afterbody start through
When crossing the heating region in heater, adjust hydrogen valve and keep the high gaseity that hydrogen flowing quantity is 13L/min ~ 18L/min,
To discharge the vapor between heater and pipe surface, it is set to be discharged along the ventilation gap between heater and sleeve, the time
For 1min ~ 2min, it is 650 DEG C ~ 700 DEG C then to reduce heater area temperature；In the whole operation of rolling, when the shaping processed
Tubing ensures the temperature control of shaping pipe in the range of 480 DEG C ~ 520 DEG C when heating region squeezes out out of heater, one
Aspect is effectively prevented the surface oxidation problem of shaping pipe, on the other hand avoid thin-wall pipes temperature drop it is excessive caused by
The defects of cracking, improve tube forming rate.
Embodiment 1：Specification is the shaping pipe that 20 × 1.25mm molybdenum alloy pipes are processed into 9.5 × 0.5 specifications
External diameter is 20mm, and wall thickness is the preparation of 1.25mm molybdenum alloy pipe：First by molybdenum powder and alloy powder by mixing
It is miscellaneous it is well mixed after be fitted into gum cover mould and be compacted, it is compressing that the mould then is placed in into isostatic pressed hydraulic cavities inner high voltage, then
20mm molybdenum alloy bar material is processed into by the high-temperature firing and forging of vacuum drying oven, last bar completes 20 by drilling ×
The preparation of 1.25mm molybdenum alloy pipes.
20 × 1.25mm molybdenum alloys the pipe prepared is pushed into through servo feed arrangement according to 15mm/min speed
The rolling machining deformation region of milling train, pipe through plug enter the heating region in two heaters when, open hydrogen valve
Door is simultaneously lighted, and keeps the high gaseity that hydrogen flowing quantity is 15L/min, time 4min, fully to give pipe to be rolled and plug
Preheating, while the pipe superficial air that burns, prevent molybdenum alloy pipe surface from being aoxidized more than 550 DEG C, and hydrogen and oxygen
The vapor generated that burns is discharged along the ventilation gap between heater and sleeve.Then, the heater heating residing for pipe is treated
When temperature in region rises to 860 DEG C, frame drives roll and heater slowly to left movement, and the pipe that is heated is in plug and roll
Extruding force effect be plastically deformed, its wall thickness and external diameter change, and complete the machine-shaping of pipe, at the same by pipe to
Left feeding, hydrogen and oxygen reaction into vapor and unnecessary air along between heater and sleeve ventilation gap discharge.
Now, the high gaseity that hydrogen flowing quantity is 15L/min is kept, heater area temperature is 860 DEG C of temperature constant state, and roll edge is managed
It is 600mm/min that base surface, which horizontally advances speed,.When frame moves to stroke terminal to the left, frame drives roll and heater
Quickly retreat to the right to rolling original position, complete pipe a time constant temperature operation of rolling.Now, the high gas of hydrogen is still kept
With the temperature constant state of heater, the horizontal astern speed of roll is 400mm/s, and frame drives roll and heater to continue to transport to the left
It is dynamic, start the operation of rolling next time.Finally, when pipe afterbody begins through rolling region, adjust hydrogen valve and keep
Hydrogen flowing quantity is 15L/min high gaseity, to discharge the vapor between heater and pipe surface, make it along heater and
Ventilation gap discharge between sleeve, the time is 1min ~ 2min, and it is 650 DEG C then to reduce heater area temperature.When processing
Shaping pipe from servo-actuated heating region squeeze out when, ensure the temperature control of shaping pipe at 500 DEG C, so as to complete 20
Processing of × 1.25mm molybdenum alloys the pipe to 9.5 × 0.5 size pipes.
The molybdenum alloy tubing of 9.5 × 0.5 specifications is carried out 850 DEG C in vacuum drying oven, insulation 40min annealings, removed
Internal stress.One group of molybdenum alloy tubing is arbitrarily chosen, sample is prepared and carries out room-temperature mechanical property test, its test data average is：
Tensile strength is 684Mp, yield strength 625Mp, elongation after fracture 18%, parameter request expected from satisfaction.
Above-described is only preferred embodiment of the present utility model, does not limit to the utility model.It should be understood that for
For one of ordinary skill in the art, under technical inspiration provided by the utility model, it can also make and other equally change
Enter, can realize the purpose of this utility model, be regarded as the scope of protection of the utility model.
Claims (2)
1. a kind of heater for rolling molybdenum alloy pipe, it is characterised in that described device includes two structure identicals
Primary heater and secondary heater；Described two heaters include hollow cylindric body, and the body includes three layers
Tube wall, the cavity for accommodating coolant, intermediate layer tube wall and innermost layer pipe are formed between outermost layer tube wall and intermediate layer tube wall
Form the cavity for accommodating hydrogen between wall, innermost layer tube wall, which is provided with, to be uniformly distributed and inside hydrogen nozzle；The pipe
One end of body is provided with hydrogen inlet, coolant inlet and cooling liquid outlet, and the other end of the body is provided with flange；Described
One heater by provided with flange be connected with the feed end of pipe mill frame, the secondary heater by provided with flange with
The discharge end connection of pipe mill frame.
2. heater according to claim 1, it is characterised in that described device also includes two structure identical sets
Cylinder, the free splaying socket with two heaters, the other end of two sleeve are solid respectively respectively for one end of two sleeve
It is scheduled on and is arranged on the support of frame both sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720314738.4U CN206747279U (en) | 2017-03-29 | 2017-03-29 | A kind of heater for rolling molybdenum alloy pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720314738.4U CN206747279U (en) | 2017-03-29 | 2017-03-29 | A kind of heater for rolling molybdenum alloy pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206747279U true CN206747279U (en) | 2017-12-15 |
Family
ID=60611722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720314738.4U Withdrawn - After Issue CN206747279U (en) | 2017-03-29 | 2017-03-29 | A kind of heater for rolling molybdenum alloy pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206747279U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106914498A (en) * | 2017-03-29 | 2017-07-04 | 金堆城钼业股份有限公司 | A kind of heater and heating means for rolling molybdenum alloy pipe |
-
2017
- 2017-03-29 CN CN201720314738.4U patent/CN206747279U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106914498A (en) * | 2017-03-29 | 2017-07-04 | 金堆城钼业股份有限公司 | A kind of heater and heating means for rolling molybdenum alloy pipe |
| CN106914498B (en) * | 2017-03-29 | 2018-12-14 | 金堆城钼业股份有限公司 | A kind of heating device and heating means for rolling molybdenum alloy pipe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20171215 Effective date of abandoning: 20181214 |