CN104128372A - Technology and device for rolling small-diameter seamless steel tube through fixed mandrel in short process - Google Patents
Technology and device for rolling small-diameter seamless steel tube through fixed mandrel in short process Download PDFInfo
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- CN104128372A CN104128372A CN201410336041.8A CN201410336041A CN104128372A CN 104128372 A CN104128372 A CN 104128372A CN 201410336041 A CN201410336041 A CN 201410336041A CN 104128372 A CN104128372 A CN 104128372A
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- 238000005096 rolling process Methods 0.000 title claims abstract description 94
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 68
- 239000010959 steel Substances 0.000 title claims abstract description 68
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- 238000005516 engineering process Methods 0.000 title abstract description 10
- 230000008569 process Effects 0.000 title abstract description 6
- 239000002184 metal Substances 0.000 claims abstract description 17
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 6
- 238000003801 milling Methods 0.000 claims description 21
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- 230000009286 beneficial effect Effects 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 7
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- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000007667 floating Methods 0.000 abstract description 3
- 230000000717 retained effect Effects 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 abstract description 2
- 238000004513 sizing Methods 0.000 abstract description 2
- 238000005098 hot rolling Methods 0.000 abstract 1
- 238000011835 investigation Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
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- 238000005097 cold rolling Methods 0.000 description 3
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- 230000000994 depressogenic effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
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- 238000007127 saponification reaction Methods 0.000 description 1
Abstract
The invention provides a technology and device for rolling a small-diameter seamless steel tube through a fixed mandrel in a short process. By means of experimental investigation on metal plastic making, design of curves of rollers is performed, the structure of a plug of the mandrel is changed, a guide plate is arranged between every two adjacent rollers, flowing formation of metal is facilitated better, reducing is performed after wall thinning, the largest sizing reduction is 30mm, and the steel tube is thinned to be in a range from 2.5mm to 5mm. The technology replaces the traditional technology for hot-rolling the seamless steel tube through a retained mandrel and a floating mandrel, so that the key breakthrough in the technology for rolling the small-diameter seamless steel tube through the fixed mandrel is obtained.
Description
Technical field
The invention belongs to the reducing and rolling technical field of minor diameter seamless steel tube, propose a kind of technique and equipment of short flow belt stationary core rod rolling minor diameter seamless steel tube.
Background technology
Minor diameter (76mm is following) seamless steel pipe consumption in the every field such as production, life is all very large.
The production of current minor diameter seamless steel tube is mainly manufactured by the mode of cold-drawn (cold rolling) hollow billet, but no matter cold-drawn or cold rolling, all need in process of production to carry out multi-pass processing, not only operation is long, cost is high, and the operation severe contamination water sources such as pickling wherein, phosphatization, saponification, country has prohibited; In addition the resistance of deformation of ferrous materials itself, raw material material scope cold rolling and that cold-drawn can be processed is rather narrow, the great like this energy and the resource of having wasted, thereby and can only utilize machining to bore bore hole to round steel to a lot of materials to obtain the minor diameter seamless steel tube that precision is higher, the time-consuming material that takes like that especially, and cost is very high.
And current domestic hot rolled seamless steel tube is all the seamless steel pipe of rolling major diameter (being more than φ 76mm), the rolling mode of employing is to adopt retained mandrel and floating core rod, and in the operation of rolling, is that first tube reducing subtracts wall again; In the time of rolling minor diameter seamless steel tube, be subject to the restriction of mandril strength, the diameter of plug can not be less than 26mm, and hollow billet enters and first carries out tube reducing after pipe mill and subtract wall again, the rotating speed that when wall is very thin, the rotating speed of roll is greater than hollow billet hollow billet unbalance stress is easily out of shape, and cannot ensure product quality.So the processing of minor diameter (φ is below 40) seamless steel pipe is not cored bar rolling substantially, i.e. shallow pass, can not ensure inner surface quality and wall thickness dimension like this.
Summary of the invention
In order to solve the problems of the technologies described above, the present invention proposes a kind of Processes and apparatus of short flow belt stationary core rod rolling minor diameter seamless steel tube.
The technical solution used in the present invention is: a kind of equipment of short flow belt stationary core rod rolling minor diameter seamless steel tube, and described equipment includes milling train foreground, three-roller diagonal rolling pipe mill and milling train backstage; Described milling train foreground includes: mandrel trolley, plug are adjusted locking device, three-roller centring device, rollgang and liftable baffle plate; On described mandrel trolley, plug is installed, described plug is adjusted locking device and is positioned at mandrel trolley direction of advance; Described three-roller centring device is positioned at plug and adjusts locking device front; Described liftable baffle plate is positioned at the front end inlet place of three-roller diagonal rolling pipe mill; Described three-roller diagonal rolling pipe mill comprises milling train main frame and transmission system; Described transmission system comprises Hooks coupling universal coupling, reductor and motor; Described milling train backstage mainly comprises rollgang and cold bed; Corresponding device is all realized and being controlled by PLC control system; Three rolls of described three-roller diagonal rolling pipe machine host are 120 degree and are distributed in rolling-mill housing, and corresponding three rolls are provided with drafts and adjust structure and roll feed angle adjustment structure; It is characterized in that: described three-roller diagonal rolling pipe mill main frame is hexagonal frame, wherein three working faces that are 120 degree distributions of described hexagonal frame arrange roll drafts guiding mechanism, and described roll drafts guiding mechanism connects three rolls; Other three be that working face that 120 degree distribute is provided with guide plate depress adjustment structure, the depressing of described guide plate adjusted structure and connected three guide plates; Described guide plate is followed successively by entrance, compression band and outlet section along hollow billet moving direction, and described entrance is that flaring footpath shape, compression band are that equal diameter shape, outlet section are convergent footpath shape; It radially has two sections of different arcwall faces described entrance, compression band and outlet section; Described rolling mill roller is split type, has two sections of rolls of entrance roll and outlet section roll; Described entrance roll is followed successively by gradually extension diameter section I and convergent footpath section I along steel pipe movement direction, form the entrance wall-reducting section of diagonal rolling pipe mill roll, the gradually extension diameter section I of entrance roll and convergent footpath section I form v-shaped structure, and described gradually extension diameter section I is identical with convergent footpath section I minimum diameter, the value difference value of the maximum gauge of the value of its minimum diameter and entrance roll is larger, has realized steel pipe is significantly subtracted to wall rolling; Described outlet section roll is followed successively by gradually extension diameter section II, equal diameter section, convergent footpath section II along steel pipe movement direction, forms tube reducing and the expansion section of diagonal rolling pipe mill roll; Its maximum gauge of gradually extension diameter section II and the minimum diameter difference of described outlet section roll are larger, steel pipe is carried out to significantly reducing and rolling, the equal diameter section of described outlet section roll is carried out expansion rolling to steel pipe, and described convergent footpath section II, for going out prostomum, facilitates steel pipe out; In described entrance roll, there is keyway, be integrally connected by key and roll mandrel, rotate with roll mandrel; Described outlet section roll endoporus has a double-row conical bearing, described double-row conical bearing is nested with on roll mandrel, the inner ring of described double-row conical bearing and described roll mandrel interference fit, rotate together with roll mandrel, the outer ring of described biserial circular cone roller contacts with described outlet section roll endoporus, do not rotate with roll mandrel, by being driven and rotate by steel rolling tube; Described entrance roll and outlet section roll side by side combination are nested with on roll mandrel, form the structure that described entrance roll rotates with steel pipe with roll mandrel rotation, described outlet section roll; Described guide plate is between the outlet section roll of every adjacent two rolls; The outlet section roll of the entrance of described guide plate and described roll gradually extension diameter section II corresponding, the compression band of guide plate is corresponding with the equal diameter section of the outlet section roll of roll, and the outlet section of guide plate is corresponding and longer than convergent footpath section II with the convergent footpath section II of the outlet section roll of roll; Described plug has mandrel body and plug bulb, and the described mandrel body of plug is isodiametric cylinder, has arc-shaped transition section between plug bulb and mandrel body; Described plug is fixedly connected with dolly, and described plug in the course of the work axial and circumferencial direction maintains static.
An equipment for short flow belt stationary core rod rolling minor diameter seamless steel tube, described plug is fixed on mandrel trolley by ring flange, and plug and ring flange are threaded connection, direction of rotation when its thread rotary orientation and hollow billet rolling.
Utilize the rolling mill practice of the equipment of described short flow belt stationary core rod rolling minor diameter seamless steel tube, before being moved into described liftable baffle plate, hollow billet after heating stops, mandrel trolley drives the plug being fixed on dolly to travel forward through hollow billet, the convergent footpath empty cavity position that plug is delivered to the gradually extension diameter section II back segment of three outlet section rolls and the formation of the entrance of three guide plates through mandrel trolley drive by plug bulb is slack, first hollow billet enters the convergent footpath cavity of the gradually extension diameter section I formation of the entrance roll of three rolls hollow billet is nipped, utilize the gradually extension diameter section I of entrance roll and the V-arrangement of convergent footpath section I formation and the equal diameter section of plug significantly to subtract wall rolling to hollow billet, hollow billet after subtracting wall rolling turns and travels forward at the effect backspin of roll feed angle, enter the cavity that the gradually extension diameter section II leading portion of three outlet section rolls forms, now hollow billet rotarily drives three outlet section rolls and rotates together, hollow billet is nipped again, then hollow billet enters the convergent footpath cavity that the gradually extension diameter section II back segment of three outlet section rolls and the entrance of three guide plates form, coordinate with plug bulb, hollow billet is carried out to significantly reducing and rolling, now the arcwall face on the entrance of three guide plates is beneficial to metal flow shaping, it is best that its metal forming state reaches, the cavity that the compression band of the equal diameter Duan Yusan of a three outlet section rolls guide plate forms afterwards carries out expansion rolling to the steel pipe subtracting after wall, reducing and rolling, and the compression band of three guide plates is beneficial to metal flow and is shaped, and has ensured the surface quality of steel pipe, after rolling completes, plug and steel pipe depart from, and the cold bed that steel pipe enters milling train backstage through rollgang I carries out cooling, and mandrel trolley is return initial position, re-starts the rolling of next root steel pipe, described plug in the course of the work axial and circumferencial direction maintains static, and plays the effect of internal mold, is beneficial to metal flow in steel pipe rolling process simultaneously and is shaped.
The present invention proposes a kind of Processes and apparatus of short flow belt stationary core rod rolling minor diameter seamless steel tube, by the experimental study to metal forming, carry out, between the design of roller curve, the structure that changes plug top, every adjacent two rolls, guide plate is installed, better be beneficial to metal flow forming realize first subtract wall again its sizing reduction of reducing and rolling be 30mm to the maximum, the thickness of steel pipe is between 2.5mm-5mm; This technology has replaced traditional hot rolled seamless steel tube retained mandrel and floating core rod, makes the technology that adds mandrel rolling minor diameter seamless steel tube obtain key breakthrough.
Brief description of the drawings
Fig. 1 horizontal layout schematic diagram of the present invention.
Fig. 2 is plug and mandrel trolley structural representation.
Fig. 3 is roll structure schematic diagram.
Fig. 4 three-roller diagonal rolling pipe mill rack construction schematic diagram.
Fig. 5 is the B-B profile of Fig. 2.
Fig. 6 is plug and roll as-rolled condition schematic diagram.
The radially section structure schematic diagram of Fig. 7 guide plate and roll.
The structural representation of Fig. 8 guide plate.
The locus schematic diagram of Fig. 9 guide plate, plug, roll.
In figure: 1, extension diameter section I gradually; 2, convergent footpath section I; 3, extension diameter section II gradually; 4, equal diameter section; 5, convergent footpath section II; 6, adjust play round nut; 7, double-row conical bearing; 8, shading ring; 9, keyway; 11, three-roller diagonal rolling pipe mill; 12, cold bed; 13, mandrel trolley; 14, plug; 15, mandrel trolley is adjusted locking device; 16, three-roller centring device; 17, rollgang I; 18, plug bulb; 19, mandrel body; 22, roll; 23, guide plate; 24, ring flange; 41, rollgang II; 42, liftable baffle plate; 43, the entrance of guide plate; 44, the compression band of guide plate; 45, the outlet section of guide plate.
Detailed description of the invention
With specific embodiment, the present invention is illustrated by reference to the accompanying drawings, still, the present invention is not limited to these examples.
As shown in Figure 1, the equipment of short flow belt stationary core rod rolling minor diameter seamless steel tube, its equipment mainly includes: milling train foreground, three-roller diagonal rolling pipe mill 11, milling train backstage.Milling train foreground includes mandrel trolley 13, mandrel trolley is adjusted locking device 15, three-roller centring device 16, rollgang II 41 and liftable baffle plate 42; Milling train backstage includes rollgang I 17, cold bed 12; Mandrel trolley 13, mandrel trolley in milling train foreground are adjusted locking device 15, three-roller centring device 16, rollgang II 41 and liftable baffle plate 42, and rollgang I 17, cold bed 12 in milling train backstage are mature equipment of the prior art.Three-roller diagonal rolling pipe mill is made up of milling train main frame and transmission system; Wherein three of milling train main frame rolls 22 are 120 degree and are distributed in rolling-mill housing, corresponding three rolls 22 are provided with drafts and adjust structure and roll feed angle adjustment structure, the drafts of its roll adjusts structure and roll feed angle adjustment structure is the general adjustment structure of existing equipment A Saier three-roll cross rolling mill, is not described in detail; Between three every adjacent two outlet section rolls of roll 21, guide plate 23 is installed, with the distortion of stable metal, three guide plates 23 are 120 degree and are distributed in rolling-mill housing, and three guide plates 23 are provided with drafts and adjust structure, it is depressed adjustment structure and can adopt the drafts of existing roll to adjust structure, is not described in detail; The transmission system of three-roller diagonal rolling pipe mill is made up of Hooks coupling universal coupling, reductor and motor.
As shown in Figure 2, plug 14 is installed on mandrel trolley 13, described plug 14 is fixed on mandrel trolley by ring flange 24, plug with ring flange by being threaded, direction of rotation when its thread rotary orientation and hollow billet rolling; Plug maintains static the effect of playing internal mold, is better conducive to metal flow in steel pipe rolling process and is shaped; Described plug 14 is the integrative-structures that combined by mandrel body 19 and plug bulb 18, and mandrel body 19 is equal diameter cylinder, between plug bulb 18 and mandrel body 19, has arc-shaped transition section; Described plug 14 is fixedly connected with mandrel trolley 13; Plug in the course of the work axial and circumferential locations maintains static; Plug inside is cavity structure, and as the cooling chamber of cooling plug, cooling chamber is communicated with cooling water source, water pump, and it is again exhalant canal that cooling chamber is intake tunnel.
As shown in Figure 3, described rolling mill roller is split type, has the roll that two sections of splits of entrance roll and outlet section roll arrange; Described entrance roll is followed successively by gradually extension diameter section I1 and convergent footpath section I2 by steel pipe movement direction, form the entrance wall-reducting section of diagonal rolling pipe mill roll, described flaring is through section I1 and convergent footpath section I2 because its tapering is larger, and sharper realization the in its V-arrangement place of the roll of composition significantly subtracts wall rolling to steel pipe; Described outlet section roll is followed successively by gradually extension diameter section II3, equal diameter section 4, convergent footpath section II5 by steel pipe movement direction, form tube reducing and the expansion section of diagonal rolling pipe mill roll, gradually extension diameter section II 3 its taperings of described outlet section roll are large, steel pipe is carried out to significantly reducing and rolling, and 4 pairs of steel pipes of equivalent footpath section of described outlet section roll carry out expansion rolling; In described entrance roll, have keyway 9, be integrally connected by key and roll mandrel, rotate with roll mandrel, roll mandrel, by shaft coupling and reductor, by motor direct-drive, is main transmission; Described outlet section roll endoporus has a double-row conical bearing 7, described double-row conical bearing 7 is nested with on roll mandrel, the inner ring of described double-row conical bearing and described roll mandrel interference fit, rotate together with roll mandrel, outer ring, the outlet section roll of described double-row conical bearing rotate with steel pipe, are passive transmission; Described approach cone roll and go out prostomum roll side by side combination be nested with on roll mandrel, wherein the biserial circular cone roller bearing in outlet section roll utilizes fixed cover 6 to fix and prevents that it from moving axially, and described fixed cover is threaded connection and is fixed on port of export roll endoporus.
As shown in Figure 4, Figure 5, three-roller diagonal rolling pipe mill frame is hexagonal frame, and wherein three working faces that are 120 degree distributions of hexagonal frame arrange roll drafts adjustment structure, and roll drafts is adjusted structure and connected three rolls; Other three are the drafts that working face that 120 degree distribute is provided with guide plate and adjust structure, and the drafts of guide plate is adjusted structure and connected three guide plates; Described guide plate and guide plate are depressed the relative hexagonal frame of adjustment structure and are maintained static; A face of regular hexagon frame fixes on the ground.
As shown in Fig. 7,8,9, described guide plate 23 is between the outlet section roll of every adjacent two rolls; Described guide plate along hollow billet moving direction be followed successively by entrance 43, compression is with 44 and outlet section 45, described entrance is flaring footpath shape, compression band for equal diameter shape, outlet section are convergent footpath shape, described entrance 43, compression with 44 and outlet section 45 its radially all there are two sections of different arcwall faces; The entrance 43 of described guide plate and the outlet section roll of described roll gradually extension diameter section II3 corresponding, the compression of guide plate is corresponding with the equal diameter section 4 of the outlet section roll of roll with 44, and the outlet section 45 of guide plate is corresponding and longer than convergent footpath section II5 with the convergent footpath section II5 of the outlet section roll of roll.
The concrete technology method of short flow belt stationary core rod rolling minor diameter seamless steel tube is: before rolling, adjust three-roller centring device in large open mode, three-roller diagonal rolling pipe machine host roll drafts and feed angle, three-roller diagonal rolling pipe machine host guide plate drafts according to technological parameter, fall at the front end inlet place that according to technological process, the hot hollow billet after perforation is delivered to three-roller diagonal rolling pipe machine host after adjustment completes simultaneously liftable baffle plate, and while preventing that plug from passing hollow billet, hollow billet moves along pipe mill vestibule direction, drive the plug 14 being fixed on dolly through hollow billet by mandrel trolley, in the time that plug reaches the required maximum advance amount of technique, liftable baffle plate rises, the hollow billet being through on plug drives and travels forward through rollgang, plug is driven and is travelled forward by mandrel trolley, and now hollow billet is identical with the movement velocity of plug, in plug bulb 18 enters the vestibule that the gradually extension diameter section II3 of three outlet section rolls and the entrance 43 of three guide plates form time, rollgang stops operating, mandrel trolley halts and adjusts locking device with plug and is connected, now by PLC control system, plug is finely tuned, make the front-extending quantity in vestibule that plug bulb 18 forms at the entrance 43 of three outlet section rolls and three guide plates reach the required numerical value of technique, now hold plug tightly for two groups of the wherein close mandrel trolley of three-roller centring device, plug is carried out to constrained vibration, all the other the five groups closed hollow billets of embracing also and between hollow billet have certain space, and hollow billet is play the guiding role, hollow billet is under the drive of rollgang and under the support of plug, first enter the convergent footpath cavity that the gradually extension diameter section I 1 of the entrance roll of three rolls forms hollow billet is nipped, utilize the gradually extension diameter section I 1 of entrance roll and V-arrangement that convergent footpath section I 2 forms and the equal diameter section of plug significantly to subtract wall rolling to hollow billet, hollow billet after subtracting wall rolling turns and travels forward at the effect backspin of roll feed angle, enter the cavity that the extension diameter section II leading portion of three outlet section rolls forms, now hollow billet rotarily drives three outlet section rolls and rotates together, hollow billet is nipped again, then hollow billet enters plug bulb, the convergent footpath cavity that gradually extension diameter section II 3 back segments of three outlet section rolls and the entrance 43 of three guide plates form carries out significantly reducing and rolling to hollow billet, now the arcwall face on the entrance 43 of three guide plates is beneficial to metal flow shaping, it is best that its metal forming state reaches, the cavity of the isodiametric compression of equal diameter Duan Yusan guide plate of the outlet section roll of three rolls with 44 formation carries out expansion rolling to the steel pipe subtracting after wall, reducing and rolling afterwards, and the compression of three guide plates is beneficial to metal flow with 44 and is shaped and has ensured the surface quality of steel pipe, hollow billet departs from gradually with plug in the operation of rolling, in the time that hollow billet leaves five three-roller centring devices successively, five three-roller centring devices are obtaining after hollow billet separating signal, closure is held plug tightly successively, when hollow billet all from three-roller centring device out, now seven three-roller centring devices all carry out constrained vibration in the state of holding plug tightly to plug, because plug and dolly are fixed by ring flange, and direction of rotation when thread rotary orientation between plug and flange and hollow billet rolling, in the operation of rolling, plug neither in axial direction advances also not with self axis rotation with hollow billet, after rolling completes, plug and steel pipe depart from completely, and the cold bed 12 that the steel pipe of roll forming enters milling train backstage through rollgang I 17 carries out cooling, and seven groups of three-roller centring devices are opened, and mandrel trolley is return initial position, re-starts the rolling of next root steel pipe.
Claims (2)
1. an equipment for short flow belt stationary core rod rolling minor diameter seamless steel tube, described equipment includes milling train foreground, three-roller diagonal rolling pipe mill and milling train backstage; Described milling train foreground includes: mandrel trolley (13), plug are adjusted locking device (15), three-roller centring device (16), rollgang II (41) and liftable baffle plate (42); Plug (14) is installed on described mandrel trolley, and described plug is adjusted locking device (15) and is positioned at mandrel trolley direction of advance; Described three-roller centring device (16) is positioned at plug and adjusts locking device front; Described liftable baffle plate (42) is positioned at the front end inlet place of three-roller diagonal rolling pipe mill (11); Described three-roller diagonal rolling pipe mill comprises milling train main frame and transmission system; Described transmission system comprises Hooks coupling universal coupling, reductor and motor; Described milling train backstage mainly comprises rollgang I (17) and cold bed (12); Corresponding device is all realized and being controlled by PLC control system; Three rolls of described three-roller diagonal rolling pipe machine host are 120 degree and are distributed in rolling-mill housing, and corresponding three rolls are provided with drafts and adjust structure and roll feed angle adjustment structure; It is characterized in that: described three-roller diagonal rolling pipe mill main frame is hexagonal frame, wherein three working faces that are 120 degree distributions of described hexagonal frame arrange roll drafts guiding mechanism, and described roll drafts guiding mechanism connects three rolls (22); Other three be that working face that 120 degree distribute is provided with guide plate depress adjustment structure, the depressing of described guide plate adjusted structure and connected three guide plates (23); Described guide plate is followed successively by entrance (43), the compression band (44) of guide plate and the outlet section (45) of guide plate of guide plate along hollow billet moving direction, the entrance (43) of described guide plate is that the outlet section (45) that the compression band (44) of flaring footpath shape, guide plate is equal diameter shape, guide plate is convergent footpath shape, described guide plate entrance (43), the compression band (44) of guide plate and the outlet section (45) of guide plate its radially there are two sections of different arcwall faces; Described rolling mill roller is split type, has two sections of rolls of entrance roll and outlet section roll; Described entrance roll is followed successively by gradually extension diameter section I(1 along steel pipe movement direction) and convergent footpath section I(2), form the entrance wall-reducting section of diagonal rolling pipe mill roll, the gradually extension diameter section I(1 of entrance roll) and convergent footpath section I(2) formation v-shaped structure, and described gradually extension diameter section I(1) with convergent footpath section I(2) minimum diameter identical, the larger realization of value difference value of the maximum gauge of the value of its minimum diameter and entrance roll significantly subtracts wall rolling to steel pipe; Described outlet section roll is followed successively by gradually extension diameter section II(3 along steel pipe movement direction), equal diameter section (4), convergent footpath section II(5), form tube reducing and the expansion section of diagonal rolling pipe mill roll; Its maximum gauge of gradually extension diameter section II (3) and the minimum diameter difference of described outlet section roll are larger, steel pipe is carried out to significantly reducing and rolling, the equivalent footpath section (4) of described outlet section roll is carried out expansion rolling to steel pipe, described convergent footpath section II(5) for going out prostomum, facilitate steel pipe out; In described entrance roll, there is keyway (9), be integrally connected by key and roll mandrel, rotate with roll mandrel; Described outlet section roll endoporus has a double-row conical bearing (7), described double-row conical bearing is nested with on roll mandrel, the inner ring of described double-row conical bearing and described roll mandrel interference fit, rotate together with roll mandrel, the outer ring of described biserial circular cone roller contacts with described outlet section roll endoporus, do not rotate with roll mandrel, by being driven and rotate by steel rolling tube; Described entrance roll and outlet section roll side by side combination are nested with on roll mandrel, form the structure that described entrance roll rotates with steel pipe with roll mandrel rotation, described outlet section roll; Described guide plate (23) is between the outlet section roll of every adjacent two rolls; The entrance (43) of described guide plate and the outlet section roll of described roll gradually extension diameter section II(3) corresponding, the compression band (44) of guide plate is corresponding with the equal diameter section (4) of the outlet section roll of roll, the outlet section (45) of guide plate and the convergent footpath section II(5 of the outlet section roll of roll) corresponding and than convergent footpath section II(5) long; Described plug (14) has mandrel body (19) and plug bulb (18), and the described mandrel body (19) of plug is isodiametric cylinder, between plug bulb (18) and mandrel body (19), has arc-shaped transition section; Described plug (14) is fixedly connected with dolly (13), and described plug in the course of the work axial and circumferencial direction maintains static.
2. a kind of rolling mill practice of equipment of short flow belt stationary core rod rolling minor diameter seamless steel tube described in claim 1, it is characterized in that: the hollow billet after heating is moved into front the stopping of described liftable baffle plate (42), mandrel trolley drives the plug (14) being fixed on dolly to travel forward through hollow billet, plug drives plug bulb is delivered to the gradually extension diameter section II(3 of three outlet section rolls through mandrel trolley) the convergent footpath empty cavity position that forms of the entrance (43) of back segment and three guide plates is slack, first hollow billet enters the gradually extension diameter section I(1 of the entrance roll of three rolls) form convergent footpath cavity hollow billet is nipped, utilize the gradually extension diameter section I(1 of entrance roll) and convergent footpath section I(2) form V-arrangement and the equal diameter section of plug hollow billet is significantly subtracted to wall rolling, hollow billet after subtracting wall rolling turns and travels forward at the effect backspin of roll feed angle, enter the gradually extension diameter section II(3 of three outlet section rolls) cavity that forms of leading portion, now hollow billet rotarily drives three outlet section rolls and rotates together, hollow billet is nipped again, then hollow billet enters the gradually extension diameter section II(3 of three outlet section rolls) the convergent footpath cavity that forms of the entrance (43) of back segment and three guide plates, coordinate with plug bulb (18), hollow billet is carried out to significantly reducing and rolling, now the arcwall face on the entrance of three guide plates is beneficial to metal flow shaping, it is best that its metal forming state reaches, the cavity that the equal diameter section (4) of three outlet section rolls and the compression band (44) of three guide plates form afterwards carries out expansion rolling to the steel pipe subtracting after wall, reducing and rolling, the compression band (44) of three guide plates is beneficial to metal flow and is shaped, and has ensured the surface quality of steel pipe, after rolling completes, plug and steel pipe depart from, and the cold bed (12) that steel pipe enters milling train backstage through rollgang I (17) carries out cooling, and mandrel trolley is return initial position, re-starts the rolling of next root steel pipe, described plug (14) in the course of the work axial and circumferencial direction maintains static, and plays the effect of internal mold, is beneficial to metal flow in steel pipe rolling process simultaneously and is shaped.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410336041.8A CN104128372B (en) | 2014-07-16 | 2014-07-16 | A kind of short route rolls the technique and equipment of minor diameter seamless steel tube with stationary core rod |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410336041.8A CN104128372B (en) | 2014-07-16 | 2014-07-16 | A kind of short route rolls the technique and equipment of minor diameter seamless steel tube with stationary core rod |
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| CN104128372A true CN104128372A (en) | 2014-11-05 |
| CN104128372B CN104128372B (en) | 2017-07-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111604376A (en) * | 2020-04-14 | 2020-09-01 | 江苏江海机床集团有限公司 | Method for forming hollow stepped shaft by three-roller skew rolling/punching combination |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2248100Y (en) * | 1996-02-15 | 1997-02-26 | 邢维基 | New-type multi-roll cold-reducing mill head |
| WO2005035154A1 (en) * | 2003-10-07 | 2005-04-21 | Sumitomo Metal Industries, Ltd. | Method of manufacturing seamless tube by three-roll mandrel mill |
| CN201244596Y (en) * | 2008-05-23 | 2009-05-27 | 郝建庚 | Diagonal rolling tube mill guide plate |
| CN202087588U (en) * | 2011-03-30 | 2011-12-28 | 洛阳鼎锐材料科技有限公司 | Hexagonal frame of reducing hot-rolled tube rolling mill |
| 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 |
-
2014
- 2014-07-16 CN CN201410336041.8A patent/CN104128372B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2248100Y (en) * | 1996-02-15 | 1997-02-26 | 邢维基 | New-type multi-roll cold-reducing mill head |
| WO2005035154A1 (en) * | 2003-10-07 | 2005-04-21 | Sumitomo Metal Industries, Ltd. | Method of manufacturing seamless tube by three-roll mandrel mill |
| CN201244596Y (en) * | 2008-05-23 | 2009-05-27 | 郝建庚 | Diagonal rolling tube mill guide plate |
| CN202087588U (en) * | 2011-03-30 | 2011-12-28 | 洛阳鼎锐材料科技有限公司 | Hexagonal frame of reducing hot-rolled tube rolling mill |
| 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 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111604376A (en) * | 2020-04-14 | 2020-09-01 | 江苏江海机床集团有限公司 | Method for forming hollow stepped shaft by three-roller skew rolling/punching combination |
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| CN104128372B (en) | 2017-07-14 |
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