CN106862273A - A kind of milling method of cold rolled tube - Google Patents
A kind of milling method of cold rolled tube Download PDFInfo
- Publication number
- CN106862273A CN106862273A CN201710229619.3A CN201710229619A CN106862273A CN 106862273 A CN106862273 A CN 106862273A CN 201710229619 A CN201710229619 A CN 201710229619A CN 106862273 A CN106862273 A CN 106862273A
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- angle
- pipe
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- roll
- milling method
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B21/00—Pilgrim-step tube-rolling, i.e. pilger mills
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
The invention discloses a kind of milling method of cold rolled tube, periodically rolled and rotary feeding system including pipe, pipe successively or is randomly turned round according to the angle value in predetermined angle array, and cycle perspective array angle value, angle array includes several mutually different angle values.Because pipe is turned round and angle value in circulating the angle array successively or randomly according to the angle value in predetermined angle array during each rotary feeding system, i.e. in the one cycle of array, the angle of revolution is different every time, so as to tubing is every time because " ears or side handles of a utensil " that rolling deformation is produced are turned back to the diverse location in roll pass, so that " ears or side handles of a utensil " can be eliminated tubing the diverse location in roll pass during back and forth being rolled by roll, the excessive wear of a certain fixed position of roll pass is not resulted in, therefore, the service life of roll pass can not only be extended, and force-bearing situation when improving the cold reduction of tubes, it is more uniformly distributed the size of pipe and tubing produced, precision is also higher.
Description
Technical field
The present invention relates to the processing technology of cold working metal tubing, and in particular to a kind of milling method of cold rolled tube.
Background technology
Cold pilger mill is to produce the special of high-precision metal seamless tubular goods under cold state using chipless processing technology to set
It is standby, it is also the key equipments of precision tube needed for high-tech area such as production Aeronautics and Astronautics, atomic energy, radio.
At present, mainly there are two kinds, i.e. multi-high cold-rolling pipe mill and two rollers using most common cold reduction of tubes equipment both at home and abroad
Formula cold pilger mill.The former as China LD type cold pilger mills, be produced using the roll of minor diameter equal section pass high accuracy
Thin-wall pipes, during rolling, pipe is to realize deformation between cylindrical mandrel and more than three rolls with equal section pass
's.Because the size of its roll pass is identical with the external diameter of finished product tubing, make it from pipe to the diameter distortion amount of finished product tubing
It is restricted, thus yield is relatively low, is mainly used in finishing rolling step.The roll pattern of multi-high cold-rolling pipe mill is with operation principle as schemed
Shown in 1, by taking three-high mill as an example, it is characterised in that the roller of milling train is made up of three rolls 101 for being mutually 120 ° of arrangements.
The LG type cold pilger mills of the latter such as China, pipe be the roll of conic mandrel bar and two with annular groove block it
Between realize rolling deformation, the pass that section is continually changing is provided with the circumference of annular groove block, the size of pass porch is big
In pipe external diameter, the size in pass exit is suitable with the external diameter of production tube.Although the design of its warp tool and manufacture are relatively stranded
It is difficult, it is necessary to be equipped with special roll pass machining tool, but, because it has tube reducing, wall thickness reducing amount big, yield grade high is significant
Advantage, thus still it is obtained widest application.The roll pattern of double-roller type cold pilger mill with operation principle as shown in Fig. 2 its
It is characterised by that the roller of milling train is made up of two rolls 201 for being mutually 180 ° of arrangements.
Either multi-high cold-rolling pipe mill or double-roller type cold pilger mill, roll is equipped with when transmission mechanism is driven by connecting rod
Work housing move back and forth when, be all by roll (external mold) and plug (internal model) force by the diameter of tube rolling base and wall thickness product
Change shape.Because being rolled metal can also produce lateral flow while Longitudinal extending, so as to two roll gap of roll it
Between can be formed " ears or side handles of a utensil " (strip projected parts that i.e. pipe surface occurs along its length).If " ears or side handles of a utensil " can not be eliminated effectively,
Outside dimension and form tolerance (cylindricity) of the pipe after rolling cannot just be ensured.
In order to obtain up-to-standard finished product tubing, cold pilger mill is each equipped with revolution and the feeder of discontinuous operation.
By taking double-roller type cold pilger mill as an example, the operation principle of revolving feed device is as shown in Figure 3.
When work housing is run near rear extreme position, the wink disengaged using the pass of roll 301 and pipe 303
Between, the leading screw on lathe bed is driven by feeder, drive feeding trolley along rolling direction pipe 303 be sent into forward it is certain away from
From (i.e. " feed afterwards ")；Meanwhile, mandrel chuck, feeding trolley, entrance and exit chuck are driven by slewing equipment, make plug
302 and tubing 303 simultaneously turn round an angle (i.e. " angle of revolution afterwards ").When work housing is moved forward, a section for being sent into
Pipe 303 realizes tube reducing in the annular gap for tapering into being made up of the pass and plug 302 of roll 301 and subtracts wall thickness
Deformation.
Equally, when work housing is run near preceding extreme position, pass and pipe 303 using roll 301 depart from
The moment of contact, pipe 303 is set to be sent into a certain distance (i.e. " preceding feed ") forward by feeder, meanwhile, filled by revolution
Putting makes plug 302 and tubing 303 while turning over an angle (i.e. " preceding angle of revolution ").When work housing is returned backward, send
The one section of pipe for entering is rolled or expansion again.
Frame is moved back and forth and once just completes a rolling cycle, and one is formed between its front and rear extreme position
Flow of metal Drawing cone.Go round and begin again, be achieved that the periodic operation of rolling to pipe.
As can be seen here, the revolving feed device of cold pilger mill is the essential part of cold pilgered pipe machine, its
Reliability, stability and reasonability directly affect the Product Precision and yield of milling train.Revolving feed device must in the operation of rolling
Reciprocating motion that must be strictly with work housing is synchronous, i.e., near the forward and backward extreme position of frame, make pipe and Mandrel Rotating
Pipe is simultaneously sent into certain length by certain angle along rolling direction.When milling train work housing makees continual reciprocating motion,
It is achieved that the effective rolling to pipe.It can be said that pipe is in cold-rolled process, how to coordinate reciprocating motion and the pipe of frame
Batch (-type) revolution with feed motion be cold pilger mill normal table operation the most important condition.
With the development of technology, the revolving feed device of cold pilger mill is after mechanical transmission structure, hydraulic drive structure,
Develop into the structure of the servo motor transmission for generally using at present.Conventional revolving feed device is due to being mechanically or hydraulically driven
Structure limitation, have been used up single revolution, single kind of drive being sent into, occur in that servo motor transmission until the nineties in 20th century
Revolving feed device after, just realize dual AC power, single be sent into and dual AC power, the rolling mill practice of double feedings.Dual AC power is in machine
Each revolution pipe and plug near the front and rear extreme position of frame each reciprocating stroke, advantage is to significantly improve product matter
Amount；And the advantage of double feedings is the plasticity for taking full advantage of material, near extreme position before and after frame each reciprocating stroke
It is each to be sent into a pipe forward, so as to increased the total amount of rolled metal in frame each reciprocating stroke, that is, improve milling train
Yield.
Now the problem is that, up to now, the revolving feed device of domestic and international cold pilger mill is either mechanical to pass
Dynamic, hydraulic drive or the revolving feed device of servo motor transmission, list is sent into, dual AC power list send also either to use list to turn round
Enter or the double feeding modes of dual AC power milling train, the angle of revolution of its pipe and plug is all a certain specific value, such as 37,43,51,
One in 54 and 57 equivalences.
In fact, as long as the angle of revolution of two-roller mill is not 180 approximate number, the angle of revolution of three-high mill is not 120 pact
Number, the angle of revolution of four-high mill is not 90 approximate number ..., by that analogy, as long as angle of revolution is not roll angle in roller system of rolling mill
Approximate number, you can effectively eliminate " ears or side handles of a utensil " phenomenon.
The shortcoming of prior art is that current every angle of revolution of milling train is all a fixed value, and this means that deformed area
Interior pipe " ears or side handles of a utensil " produced after rolling is all turned back to the position of this fixation angle of revolution of correspondence on pass, and this certainly will
This position of roll pass is caused to wear and tear very fast, the service life of influence roll pass, and the local quick mill of roll pass
Damage not only results in pipe deformation everywhere and produces difference, influences the machining accuracy of pipe fitting, and pipe stress is not during because of rolling
Uniformly, cause pipe fitting local friction larger, the roughness of rear tube surfaces is rolled in influence.
The content of the invention
The application provide that a kind of cold rolled tube rolling stress is more uniformly distributed, roll pass service life is longer and rolling accuracy more
Milling method high.
A kind of a kind of milling method of the cold rolled tube provided in embodiment, including pipe is periodically rolled and revolution is sent
Enter, pipe is turned round according to the angle value in predetermined angle array successively or randomly, and cycle perspective array angle value,
Angle array includes several mutually different angle values.
Further, the angle value in angle array at least one be not roll angle approximate number.
Further, the angle value in angle array is respectively less than 90.
Further, pipe revolution is driven by revolving feed device, and revolving feed device includes servomotor, servo electricity
Machine is turned round according to default angle array driving tube material.
Further, pipe and plug synchronous revolving.
According to the milling method of the cold rolled tube of above-described embodiment, during being rolled due to many second periodicities, pipe is successively
Or randomly according to the angle value revolution in angle array, and circulate the angle value in the angle array, i.e., in array
In one cycle, the angle of revolution every time is different, so as to be located at roll pass not after each " ears or side handles of a utensil " revolution for producing of tubing
Same position, so that tubing is every time because " ears or side handles of a utensil " that rolling deformation is produced are turned back to the diverse location in roll pass so that pipe
" ears or side handles of a utensil " can eliminated different positions in roll pass by material during back and forth being rolled by roll, not result in roll hole
The excessive wear of certain fixed position of type, therefore, can not only extend the service life of roll pass, and improve the cold reduction of tubes
When force-bearing situation, be more uniformly distributed the size of pipe and tubing produced, precision is also higher.
Brief description of the drawings
Fig. 1 is the schematic cross-section of three roller cold pilger mill cold-rolling deformations；
Fig. 2 is the schematic cross-section of two roller cold pilger mill cold-rolling deformations；
Fig. 3 is the principle schematic of the rolling of two roller cold pilger mills and rotary feeding system.
Specific embodiment
The present invention is described in further detail below by specific embodiment combination accompanying drawing.
In the present embodiment provide a kind of milling method of cold rolled tube, the process equipment that this milling method is used with it is existing
Equipment is identical, i.e., periodically rolling and rotary feeding system are carried out to pipe by two rollers or multi-roll mill, and the present embodiment is with two rollers
Illustrated as a example by mill milling.
The cold rolled tube of the present embodiment is rolled by two-roller mill and formed, and two-roller mill includes that two are mutually rolling for 180 ° of angles
Roller, plug is provided with the pass center of two rolls, roll as external mold, plug as internal model, be pointed to roll and plug it
Between pipe rolled, and revolving feed device is installed on two-roller mill, the actuator of revolving feed device is servo
Motor, revolving feed device is used to drive the revolution and the feeding of pipe of pipe and plug.So as to the milling method of this cold rolled tube
Step includes：Two-roller mill periodically rolling and rotary feeding system pipe, are finally made cold rolled tube.
In the operation of rolling, each revolution of pipe is not a fixed angle of revolution to the milling method of the present embodiment,
But turned round according to the angle value in predetermined angle array successively or randomly, and cycle perspective array angle value,
Angle array includes several mutually different angle values, i.e., in an array circulation, pipe turns round different angles every time,
So as to tubing is every time because " ears or side handles of a utensil " that rolling deformation is produced are turned back to the diverse location in roll pass, after rotary feeding system again
During secondary rolling, " ears or side handles of a utensil " are contacted in the different position of roll pass, without the same position that weares and teares all the time, do not result in roll hole
The excessive wear of a certain fixed position in type, therefore, can not only extend the service life of roll pass, and it is cold to improve tubing
Force-bearing situation when rolling, is more uniformly distributed the cold rolling size of pipe and tubing produced, and precision is also higher.
Specifically, some angle dope vectors are input in controller, controller controls servo electricity according to angle array
The driving of machine, drives revolving feed device to realize the revolution of tubing and plug by servomotor, when having performed angle successively or at random
After all angles value of number of degrees group, then restart, form circulation.Angle value number and numerical value in angle array can be according to realities
Border situation is set, but angle array in the present embodiment, to select the angle value less than 90, even less than 60 are advisable, it is to avoid interval
The gyration of formula produces larger impact, and such as angle array is { 37,41,45,49,53,57 }.The present embodiment is due to passing through
One angle array controls the revolution of pipe and plug, therefore the angle value in array can include the approximate number of roll angle, principle
On have one be not roll angle approximate number, but in order to obtain more preferable product quality, the present embodiment is not using some
The angle value of roll angle approximate number, to improve the uniformity of cold rolled tube.
The rolling of two roller cold pilger mills and the principle of rotary feeding system are as shown in Figure 3.
When work housing is run near rear extreme position, the wink disengaged using the pass of roll 301 and pipe 303
Between, the leading screw on lathe bed is driven by feeder, drive feeding trolley along rolling direction pipe 303 be sent into forward it is certain away from
From；Meanwhile, mandrel chuck, feeding trolley, entrance and exit chuck are driven by slewing equipment, make plug 302, pipe 303 and into
QC 304 turns over an angle simultaneously.When work housing is moved forward, one section of pipe 303 being sent into is by pass and core
Tube reducing is realized in the annular gap for tapering into that rod 302 is constituted and subtracts wall thickness deformation.
Equally, when work housing is run near preceding extreme position, pass and pipe 303 using roll 301 depart from
The moment of contact, pipe 303 is set to be sent into a certain distance forward by feeder, meanwhile, plug 302, pipe are made by slewing equipment
Base 303 and production tube 304 turn over another angle simultaneously.When work housing is returned backward, one section of pipe being sent into is subject to
Roll again or expansion.
Frame is moved back and forth and once just completes a rolling cycle, and one is formed between its front and rear extreme position
Flow of metal Drawing cone.In next cycle, plug 302, pipe 303 and the priority of production tube 304 with angle array in addition
Two angle value revolutions, go round and begin again, and are achieved that the periodic operation of rolling to pipe.
The present embodiment provide a kind of cold rolled tube milling method, due to each rotary feeding system during successively or with
Machine ground is turned round according to the angle value in predetermined angle array, and circulates the angle value in the angle array, i.e., in array once
In circulation, the angle of revolution every time is different, so that tubing is every time because " ears or side handles of a utensil " that rolling deformation is produced are turned back to roll pass
In diverse location so that tubing is eliminated in the different position of roll pass " ears or side handles of a utensil " in the periodic operation of rolling, no
The excessive wear of a certain fixed position on roll pass can be caused, can not only extend the service life of roll pass, and improve
The force-bearing situation during cold reduction of tubes, is more uniformly distributed the size of pipe and tubing produced, and precision is also higher.
Use above specific case is illustrated to the present invention, is only intended to help and understands the present invention, is not used to limit
The system present invention.For those skilled in the art, according to thought of the invention, can also make some simple
Deduce, deform or replace.
Claims (5)
1. a kind of milling method of cold rolled tube, including pipe is periodically rolled and rotary feeding system, it is characterised in that the pipe
Turned round according to the angle value in predetermined angle array successively or randomly, and circulated the angle value of the angle array, institute
Stating angle array includes several mutually different angle values.
2. the milling method of cold rolled tube as claimed in claim 1, it is characterised in that the angle value in the angle array is at least
Have one be not roll angle approximate number.
3. the milling method of cold rolled tube as claimed in claim 2, it is characterised in that the angle value in the angle array is small
In 90.
4. the milling method of cold rolled tube as claimed in claim 3, it is characterised in that the pipe rotary feeding system is sent by revolution
Enter device driving, the revolving feed device includes servomotor, and the servomotor drives according to the default angle array
Dynamic tubing revolution.
5. the milling method of cold rolled tube as claimed in claim 1, it is characterised in that the pipe and plug synchronous revolving.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710229619.3A CN106862273A (en) | 2017-04-10 | 2017-04-10 | A kind of milling method of cold rolled tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710229619.3A CN106862273A (en) | 2017-04-10 | 2017-04-10 | A kind of milling method of cold rolled tube |
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| CN106862273A true CN106862273A (en) | 2017-06-20 |
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| CN201710229619.3A Pending CN106862273A (en) | 2017-04-10 | 2017-04-10 | A kind of milling method of cold rolled tube |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110935731A (en) * | 2019-12-09 | 2020-03-31 | 杭州淳通新材料科技有限公司 | Multi-roller surrounding type high-precision seamless taper pipe forming roller die |
| CN111112339A (en) * | 2019-12-31 | 2020-05-08 | 南京沃尔德特钢有限公司 | Method for manufacturing seamless stainless steel heat exchanger tube |
| CN113953326A (en) * | 2021-11-05 | 2022-01-21 | 浙江嘉翔精密机械技术有限公司 | Mechanism for rolling high-precision special-shaped tube |
| CN115318828A (en) * | 2022-09-02 | 2022-11-11 | 张家港华裕有色金属材料有限公司 | Rolling method for cold-rolled metal pipe |
| CN115338266A (en) * | 2022-09-02 | 2022-11-15 | 张家港华裕有色金属材料有限公司 | Cold rolling method for metal pipe |
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| US4233834A (en) * | 1979-01-26 | 1980-11-18 | Sandvik Special Metal Corporation | Method and apparatus for producing zircaloy tubes and zircaloy tubes thus produced |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110935731A (en) * | 2019-12-09 | 2020-03-31 | 杭州淳通新材料科技有限公司 | Multi-roller surrounding type high-precision seamless taper pipe forming roller die |
| CN111112339A (en) * | 2019-12-31 | 2020-05-08 | 南京沃尔德特钢有限公司 | Method for manufacturing seamless stainless steel heat exchanger tube |
| CN113953326A (en) * | 2021-11-05 | 2022-01-21 | 浙江嘉翔精密机械技术有限公司 | Mechanism for rolling high-precision special-shaped tube |
| CN113953326B (en) * | 2021-11-05 | 2024-05-07 | 浙江嘉翔精密机械技术有限公司 | High-precision mechanism for rolling special-shaped tube |
| CN115318828A (en) * | 2022-09-02 | 2022-11-11 | 张家港华裕有色金属材料有限公司 | Rolling method for cold-rolled metal pipe |
| CN115338266A (en) * | 2022-09-02 | 2022-11-15 | 张家港华裕有色金属材料有限公司 | Cold rolling method for metal pipe |
| CN115318828B (en) * | 2022-09-02 | 2023-10-27 | 张家港华裕有色金属材料有限公司 | Rolling method for cold-rolled metal pipe |
| CN115338266B (en) * | 2022-09-02 | 2023-10-27 | 张家港华裕有色金属材料有限公司 | Cold rolling method for metal tube |
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Application publication date: 20170620 |