CN1039630C - Rapid multistrand pipe mill - Google Patents
Rapid multistrand pipe mill Download PDFInfo
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- CN1039630C CN1039630C CN94107341A CN94107341A CN1039630C CN 1039630 C CN1039630 C CN 1039630C CN 94107341 A CN94107341 A CN 94107341A CN 94107341 A CN94107341 A CN 94107341A CN 1039630 C CN1039630 C CN 1039630C
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Abstract
The present invention relates to a high-speed multi-strand pipe mill which belongs to the field of metal pipe rolling. The present invention is characterized in that a mill frame is fixed; rollers only pivot on axes thereof without shift; each roller shaft is provided with two or more than two rollers with grooves, and two or more than two groups of grooves are formed, wherein one group of grooves is arranged in the idle stroke corners of the other grooves; the section-variable rolling angle alpha of the roller pass of each groove is greater than the revolving feeding angle beta; clamping controllers are arranged on both sides of a guide track; the number of tracks, synchronous clamping heads for pipe blanks, synchronous clamping heads for core rods, the clamping controllers, rapid return mechanisms, slider-crank mechanisms and spline shafts of revolving feeding boxes is identical to the number of the grooves.
Description
The invention belongs to the rolling field of metal tube.
In the prior art, in the production, in the rotary forging mill of small-caliber metallic, periodic two-high pilger cold-rolling mill and hot rolling pilgrim rolling machine are arranged more typically.Though hot rolling pilgrim rolling machine is usefulness seldom, cold rolling pilgrim rolling machine is still widely used.
The typical structure form of periodic two-high pilger cold-rolling mill is that frame moves back and forth, and promotes two rolls as wheel, on one side back and forth translation, to rotate on one side (two roll directions are opposite), the mode that the pipe of plug is housed with spreading inside is rolled.This pipe mill housing rigidity height, roll pass is for becoming the section pass.Therefore, sizing reduction, wall thickness reducing amount are all bigger; But the frame heaviness, heavy moving parts is big, and rotary inertia is big, is unfavorable for the raising of unit speed.The appearance of the fixed periodic two-high pilger cold-rolling mill of frame, though fix at the version upper spider, roll is still done back and forth parallel moving or swing.Though can make frame weight saving, rolling mill structure is still complicated, and the resistance that plug is subjected to is big; Oscillating rolling mill, the roll swing, the roll-force of milling train is also bigger than normal.
Existing multiple wire system rotary forging mill is with unit rolling several tubes simultaneously, and in the hope of enhancing productivity, but general rolling force improves greatly, and main motor current obviously strengthens; Simultaneously, for guaranteeing head enough strength and stiffness are arranged, the weight of head also correspondingly increases greatly; Roll mandrel rigidity also is subjected to certain restriction; In addition, adjust roll pass than factors such as difficulties, so mill speed is lower, product quality is not high, can only be used for the pipe (US 3308643) of cogging and production Φ 80mm.
Another kind of novel multiple wire system two roller rotary forging mills in order to reduce input power, stagger rolling angle, but the idle stroke angle also is arranged on the same angle, but milling train still has the shortcoming of portable frame pipe mill, fails to make full use of power of motor, production efficiency still lower (US 3650138).
The objective of the invention is to high speed, multi-thread, long stroke, annular distance type and energy-conservation etc. combining, provide a kind of simple in structure, power consumption is few, mill speed reaches the high rapid multistrand pipe mill of production efficiency soon.
At above-mentioned purpose, the present invention at a high speed, multi-thread, annular distance type combines, and adopts to become section pass, all very big scheme of tube reducing wall thickness reducing amount, on the basis of periodic two roller pipe mills, proposed the dual roll type pipe mill of new construction.Its main technical schemes is as follows:
Rapid multistrand pipe mill of the present invention, its frame is fixed frame, and a pair roller axle is housed on the frame, and the roll of two or more grooves with holes is housed on every roll mandrel, constitutes two groups or more hole slot parallel to each other; Each hole slot comprises a tube reducing section angle α and idle stroke section angle β, alpha+beta=360 °; Under the two-wire situation, α＞β, under three-way and three-way above situation, α＜β; Each sizing reduction section of organizing hole slot is staggeredly arranged with the sizing reduction section of other group hole slot on the Zhou Fangxiang of roll garden, the sizing reduction section of one group of hole slot is arranged on the idle stroke section of all the other group hole slots, during two groups of hole slots, each hole slot sizing reduction section angle is by 180 ° of distributions each other, during three groups of hole slots, each hole slot sizing reduction section angle is by 120 ° of distributions each other, during n group hole slot, each hole slot sizing reduction section angle distributes by differing 2 π/n, and π is 180 °; In the guide rail side chucking controller is housed, this chucking controller also links to each other with the bearing block of the synchronous dop of plug; Revolution is sent case to and is linked to each other with the synchronous dop of chain and plug through minor sprocket; Slider-crank mechanism is sent case to through rocking bar, fork, connecting rod and push rod and revolution and is linked to each other; The synchronous dop of pipe is sent case by support, nut, bearing to multi-thread leading screw and revolution respectively with the synchronous dop of plug and is linked to each other, and link to each other with guide rail with support through support plate, fast return mechanism is connected in revolution through its Motor Shaft, small belt pulley and belt and sends case to; In addition, roll is only done the complete cycle rotation around self axis, does not move; Main motor has two output axle heads, and an end is connected in the roll mandrel of pipe mill through decelerator, and the other end links to each other with the displacement working machine with decelerator through major axis; The displacement working machine links to each other by two or more flywheels slider-crank mechanism identical with quantity;
In technique scheme, roll pass adopts variable cross-section half cycle groove pass, and the radius of hole slot diminishes gradually, and the maximum radius of hole slot is greater than the radius of supplied materials pipe, and least radius is equal to or less than the production tube radius that rolls into.
The quantity that case and slider-crank mechanism are sent in guide rail, the synchronous dop of pipe, the synchronous dop of plug, chucking controller, fast return mechanism, revolution to is all identical with the hole slot number.
In the outer sleeve of dop front spring and rear spring are housed synchronously, forward and backward spring is placed in again on the inner sleeve, and inner sleeve links to each other with outer sleeve through feather key, and outer sleeve is assemblied on the bearing block.The front end of inner sleeve is equipped with chuck, and there is a boss centre.Two spacers are equipped with on the boss both sides.
Chucking controller in above-mentioned is made up of chucking optical axis, little bracing strut, little axle, collision block chucking square iron, collision block, fork, push rod, hinge fork, ball pivot straight-bar, chucking optical axis catcher, corner cam, chucking controller block tongue, block tongue holddown spring, chucking controller depression bar and chucking controller seat; Two little bracing struts are fixed on two bearing blocks, and little axle is loaded in the little bracing strut, and two blocks of collision block chucking square iron are fixed on little
(5) the revolution feed angle of roll pass of the present invention increases by 500 above than the available feed angle of annular distance type of existing milling train.Therefore, also corresponding increase of the time of rolling is sent in the revolution of permission, thereby makes revolution send the milling train structure to simplify, and gross weight reduces 1/3 than existing single line pipe mill, thereby has reduced the cost of milling train.
(6) milling train of the present invention is simple in structure, and operation is adjusted and be easy to maintenance.
The invention will be further described now to reach implementation method in conjunction with the accompanying drawings:
Fig. 1 is the overall structure schematic diagram of rapid multistrand pipe mill of the present invention.
Hole slot structural configuration schematic diagram when Fig. 2 is two groups of rolls.
Fig. 3 is a milling method schematic diagram of the present invention.
Fig. 4 A is that synchronous dop is faced structural representation.
Fig. 4 B is synchronous dop plan structure schematic diagram.
Fig. 5 is chucking controller architecture schematic diagram.
Fig. 6 sends the box structure schematic diagram to for revolution.
Fig. 7 is that the syndeton schematic diagram between the case is sent in displacement working machine, slider-crank mechanism and revolution to.
Among Fig. 1,1 is the pipe mill frame, and 2 is guide rail, 3 is the synchronous dop of pipe, and 4 is the synchronous dop of plug, and 5 are the chucking controller, 6 are fast return mechanism, and 7 is that case is sent in revolution to, and 8 is slider-crank mechanism, 9 are the displacement working machine, and 10 and 15 is decelerator, and 12 is major axis, 13 is main motor, and 11 and 14 is the tapered decelerator in garden, and 16 is the centralized lubrication station, 17 is Hydraulic Station, and 18 is plug.
Wherein, frame 1 maintains static, and a pair roller axle 28 and 36 are housed on the frame 1, and roll mandrel is loaded in the frame 1 by bearing block 21,35,27,29, and the roll of two or more grooves with holes is housed on every roll mandrel.Roll is around self axis rotation; Synchronous dop 3 of pipe and the synchronous dop 4 of plug place on the guide rail 2, and can move back and forth on guide rail 2; The guide rail number is corresponding with the hole slot number that roll is formed; With respect to the two or more hole slots on the roll, two or many guide rails are arranged then; Case 7 is sent in the corresponding synchronous dop 3 of pipe, the synchronous dop 4 of plug, chucking controller 5, fast return mechanism 6, revolution to and slider-crank mechanism 8 all has two covers or many covers, and is corresponding with the hole slot number.
Chucking controller 5 is assemblied on the bearing block 45 of the synchronous dop 4 of side, plug of guide rail 2; Revolution is sent case 7 to and is linked to each other through the synchronous dop 4 of sprocket wheel 96 and chain 97 and plug, and slider-crank mechanism 8 is sent case 7 to through rocking bar 102, fork 103, connecting rod 104 and push rod 101 and revolution and linked to each other; Two output shafts of main motor 13, an end is connected in the roll mandrel 28 of pipe mill through decelerator 14,15, and the other end links to each other with displacement working machine 9 with decelerator 1O, 11 through major axis 12; Displacement working machine 9 links to each other with slider-crank mechanism 8 by flywheel 100; Slider-crank mechanism 8 links to each other with the splined shaft 88 of revolution case 7; The synchronous dop 3 of pipe is sent case 7 by support 54, nut 56, bearing 57 to multi-thread leading screw 55 and revolution respectively with the synchronous dop 4 of plug and is linked to each other, and links to each other with guide rail 2 with support 54 through support plate 46.
Among Fig. 2 and Fig. 3,18 is plug, and 19 is pipe, 21,35,27,29 be roll chock, 22,34,26,30 are the nut of fastening roll pass, and 23,33,25,31 are roll, 24,32 be the garden stud wheel that distributes moment, 28,36 is roll mandrel.Roll mandrel 28 links to each other with main motor reducer 15 through shaft joint, and drives roll mandrel 36 through main drive gear 32 and 24.The hole slot sizing reduction section angle of adjacent rollers on the roll mandrel (as roll 23 and roll 25) staggers by garden Zhou Fangxiang, differs 2 π/n (n is the roll line number, as two lines or multi-thread); Roll 33 differs 2 π/n equally with the hole slot sizing reduction section angle of roll 31.α is the hole slot sizing reduction section angle of roll, and β is roll pass idle stroke section angle.And alpha+beta=360 °.Under the two-wire situation, α＞β; Under three-way or three-way above situation, α＜β.
Fig. 4 A, among Fig. 4 B and among Fig. 5,41 is outer sleeve, and 42 is front spring, 43 is inner sleeve, and 44 is chuck, and 45 is bearing block, 46 is support plate, and 47 chew for pipe inlet, and 48 is rear spring, 49 is outer shroud, and 50 is gear wheel, and 51 is pinion, 52 is the corner optical axis, and 53 are the chucking optical axis, and 54 is support, 55 is multi-thread leading screw, and 56 is nut, and 57 is bearing, 58 is spacer, and 59 is minor sprocket, and 97 is chain, 61 is little bracing strut, and 62 is little axle, and 63 are collision block chucking square iron, 64 is collision block, and 65 is fork, and 66 is push rod, 67 is the hinge fork, and 68 is the ball pivot straight-bar, and 69 are chucking optical axis catcher, 70 is the corner cam, and 71 are chucking controller block tongue, and 72 is the block tongue holddown spring, 73 are chucking controller depression bar, and 74 are chucking controller seat.
Wherein, form chucking controller 5 by chucking optical axis 53, little bracing strut 61, little axle 62, collision block chucking square iron 63, collision block 64, fork 65, little push rod 66, hinge fork 67, ball pivot straight-bar 68, chucking optical axis catcher 69, corner cam 70, chucking controller block tongue 71, block tongue holddown spring 72, chucking controller depression bar 73 and chucking controller seat 74.
In accompanying drawing 6,81 is small belt pulley, and 82 is belt, 83 is belt pulley, and 84 is pinion, and 85 is clutch, 86 is shift fork, and 87 is oil cylinder, and 88 is splined shaft, 89 is the transverse presentation bar, and 90 is freewheel clutch, and 91,95 is axle, 92,93 is bevel gear, and 94 is gear wheel, and 96 is sprocket wheel, 97 is chain, and 98 is casing.
Have small belt pulley 81 on the Motor Shaft in the fast return mechanism 6, be coupled to the belt pulley 83 that case 7 is sent in revolution to through belt 82, belt pulley 83 links to each other with splined shaft 88 by spline housing, between pinion 84 and the splined shaft 88 sliding bearing is arranged; When clutch 85 is thrown off with pinion 84, motor in the fast return mechanism 6 just can drive splined shaft 88 rotations, drive 55 rotations of multi-thread leading screw again, promote the synchronous dop 3 of pipes by nut 56, support 54 and on guide rail 2, advance fast or retreat, realize the synkinesia in the operation.At this moment, throw off because of clutch 85, pinion 84 does not rotate, and the synchronous dop 3,4 of pipe and plug stops the rotation.
Promote under clutch 85 closure states through shift fork 86 at hydraulic jack 87, when transverse presentation bar 89 is reciprocating by slider-crank mechanism 8 promotions, because of splined shaft 88 and multi-thread leading screw 55 for fixedlying connected, so splined shaft 88 is also reciprocating with multi-thread leading screw 55, to realize the working motion of tube rolling.Slider-crank mechanism 8 also promotes freewheel clutch 90 simultaneously and rotates, driving bevel gear 92,93 by axle 91 again rotates, promote pinion 84 rotations again with the bevel gear 93 coaxial gear wheels of fixedlying connected 94, again through clutch 85, make splined shaft 88 rotations, make it drive multi-thread leading screw 55 and rotate, promote the synchronous dop 3 of pipe through nut 56 and make feed motion.Gear wheel 94 also links to each other with sprocket wheel 96 by axle 95 simultaneously, sprocket wheel 59 on the corner optical axis 52 that chain 97 drives in the synchronous dop 4 of plug rotates, cog 51 and 50 by corner optical axis 52, the outer sleeve 41 that drives the dop body rotates, drive inner sleeve 43 and the rotation of 44 chucks through feather key again, when realizing that pipe is sent to, pipe and plug rotate an angle simultaneously like this.
Among Fig. 7,99 are the power shaft of displacement working machine, and 100 is the flywheel on the output shaft, and the flywheel number is identical with the hole slot number, and 101 is push rod, and 102 is rocking bar, and 103 is fork, and 104 is big connecting rod, and 105 is bearing block, and 106 is framework, and 107 is small rod.Flywheel 100 links to each other with slider-crank mechanism 8.Power shaft 99 links to each other with decelerator 10.
The following (see figure 3) of the course of work of rapid multistrand pipe mill of the present invention:
Before the rolling beginning, pipe 19 is delivered to position to be rolled from the afterbody of the synchronous dop 3 of pipe, adjust the plug position, guarantee to be between plug and pass the position of rolling mill practice requirement, and the plug afterbody is locked.With the synchronous dop 3 of pipe locking back, pipe to be rolled rear end by multi-thread leading screw 55 just or reverse turn pipe is adjusted to rolling position (preceding extreme position), adjust finish after, start main motor 13.
During rolling beginning, the position of the rolling with varying section angle α of roll pass just in time is positioned at mouthful position of nipping, pipe 19 and plug 18 are positioned at preceding extreme position, because work roll 23 and 33 begins to rotate under the driving of main motor 13, pipe 19 begins tube reducing and subtracts wall under the reaction of spreading effect that becomes the section pass and plug 18, and along the rolling direction rollback, because of the slider-crank mechanism roll that is variable motion when the rollback and the crank block mechanism that disappears is to have speed poor.The sync card head mechanism can make pipe coordinate mutually with mill speed with plug, and the axial force that pipe and multi-thread thick stick 55 are subjected to is very little, and the most of the time is subjected to when rolling is pulling force.When positive stroke was rolling, plug 18 and pipe 19 were rolled down to the back extreme position under the acting in conjunction of roll 20, sync card head mechanism 3,4 and slider-crank mechanism 8 like this, and promptly finish the α position, hole slot sizing reduction section angle of roll, and it is rolling to finish a positive stroke.
During the rolling end of positive stroke just in time is the revolution of pipe and plug and the beginning that pipe is sent to, and This move is to finish in the dead slot district that roll pass has forwarded position, β angle to.
In the dead slot at β angle, roll pass does not have roll-force to pipe.Utilize the rotational time of this dead slot, the position to be rolled of slider-crank mechanism 8 limit before the back extreme position after rolling back into by first positive stroke pipe 19 and plug 18.In the process that pushes away forward, the corner of pipe, send to the plug corner and all finish, realize then that again second positive stroke is rolling, so gradually it is rolled into production tube.When first pipe was rolled down to extreme position, the fast return under the effect of multi-thread leading screw 55 of the synchronous dop 3 of pipe reloaded another pipe again, realizes rolling once more.
Said process is the operation of rolling of a pass of two-wire tube rolling, and the operation of rolling of another line is rolling identical with first line.
In the operation of rolling, the reciprocal translation of pipe 19 on guide rail 2 is to be finished by the multi-thread leading screw 55 pulling sync card head mechanisms 3,4 that slider-crank mechanism 8 is sent case 7 to through revolution.Pipe send to be by slider-crank mechanism 8 after revolution is sent case 7 to and is driven multi-thread leading screw 55 rotations, sync card head mechanism 3 is moved forward finishes; The corner of pipe and plug is also sent case 7 to and the synchronous dop 3 of sprocket wheel, chain, corner optical axis and pipe is finished by slider-crank mechanism 8 through revolution.
Claims (9)
1, a kind of rapid multistrand pipe mill, comprise the synchronous dop of frame, roll, roll mandrel, guide rail, plug and pipe, fast return mechanism, turn round and send case, slider-crank mechanism, displacement working machine, decelerator, main motor to, the synchronous dop of plug and pipe places on the guide rail, it is characterized in that:
A, frame (1) are fixed frame;
A pair roller axle (28,36) is housed on B, the frame (1), the roll (33,31,23,25) of two or more grooves with holes is housed on every roll mandrel, constitute two groups or more hole slot parallel to each other;
C, each hole slot comprise a tube reducing section angle α and idle stroke section angle β, alpha+beta=360 °, and under the two-wire situation, α＞β, under three-way and three-way above situation, α＜β;
D, the sizing reduction section of respectively organizing hole slot are staggeredly arranged with the sizing reduction section of other group hole slot on the Zhou Fangxiang of roll garden, the sizing reduction section of one group of hole slot is arranged on the idle stroke section of all the other group hole slots, during two groups of hole slots, each hole slot sizing reduction section angle is by 180 ° of distributions each other, during three groups of hole slots, each hole slot sizing reduction section angle is by 120 ° of distributions each other, during n group hole slot, each hole slot sizing reduction section angle distributes by differing 2 π/n, and π is 180 °;
E, chucking controller (5) is housed in guide rail (2) side, this chucking controller (5) also links to each other with the bearing block (45) of the synchronous dop of plug (4);
F, revolution are sent case (7) to and are linked to each other with the synchronous dop of plug (4) with chain (97) through minor sprocket (59); Slider-crank mechanism is sent case (7) to through rocking bar (102), fork (103), connecting rod (104) and push rod (101) and revolution and is linked to each other, the synchronous dop of pipe (3) is sent case (7) to by support (54), nut (56), bearing (57) and multi-thread leading screw (55) and revolution respectively with the synchronous dop of plug (4) and is linked to each other, and link to each other with guide rail (2) with support (54) through support plate (46), fast return mechanism (6) is connected in revolution through its Motor Shaft, small belt pulley (81) and belt (82) and sends case (7) to;
G, roll only do the complete cycle rotation around self axis, do not move;
H, main motor (13) have two output axle heads, and an end is connected in the driving roll mandrel (28) of the power shaft (99) of pipe mill through decelerator (14,15), drive roll mandrel (28) and link to each other with roll mandrel (36) through main drive gear (32 and 24).The other end links to each other with displacement working machine (9) with decelerator (10,11) through major axis (12).
2, pipe mill according to claim 1 is characterized in that roll pass adopts variable cross-section half cycle groove pass, and the radius of hole slot diminishes gradually, and the maximum radius of hole slot is greater than the radius of supplied materials pipe, and least radius is equal to or less than the production tube radius that rolls into.
3, pipe mill according to claim 1, it is all identical with the hole slot number to it is characterized in that the quantity of case (7) and slider-crank mechanism (8) is sent in guide rail (2), the synchronous dop of pipe (3), the synchronous dop of plug (4), chucking controller (5), fast return mechanism (6), revolution to.
4, pipe mill according to claim 1, it is characterized in that in the outer sleeve (41) of synchronous dop (3,4) front spring (42) and rear spring (48) being housed, forward and backward spring (42,48) is placed in again on the inner sleeve (43), inner sleeve (43) links to each other with outer sleeve (41) through feather key, and outer sleeve (41) is assemblied on the bearing block (45).
5, pipe mill according to claim 4 is characterized in that the front end of inner sleeve (43) is equipped with chuck (44), and there is a boss centre.
6, pipe mill according to claim 1 is characterized in that tightening controller (5) and is made up of chucking optical axis (53), little bracing strut (61), little axle (62), collision block chucking square iron (63), collision block (64), fork (65), push rod (66), hinge fork (67), ball pivot straight-bar (68), chucking optical axis catcher (69), corner cam (70), chucking controller block tongue (71), block tongue holddown spring (72), chucking controller depression bar (73) and chucking controller seat (74); Two little bracing struts (61) are fixed on two bearing blocks (45), little axle (62) is loaded in the little bracing strut (61), two blocks of collision block chucking square iron (63) are fixed on little axle (62) axle, fix a collision block (64) on every block of chucking square iron, chucking optical axis catcher (69) is by ball pivot straight-bar (68), hinge fork (67) is fixed on the guide rail (2), another pin joint of hinge fork (67) also is fixed on the guide rail (2) by little push rod (66) and fork (65), chucking controller depression bar (73) one ends are articulated on the chucking controller seat (74), the other end inserts in the clamping device block tongue (71), block tongue holddown spring (72) is arranged below the block tongue (71), and chucking controller seat (74) is fixed on the support plate (46).
7, pipe mill according to claim 1, it is characterized in that displacement working machine (9)) output shaft link to each other with the corresponding two or more flywheels of hole slot number (100), flywheel (100) links to each other with slider-crank mechanism (8), and slider-crank mechanism (8) links to each other with the Splined Spindle (88) that case (7) are sent in revolution to.
8, pipe mill according to claim 7 is characterized in that tightening the sandwich outer shroud (49) of two block tongues (71) of controller.
9, pipe mill according to claim 5 is characterized in that the boss both sides are equipped with two spacers (58).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94107341A CN1039630C (en) | 1994-07-06 | 1994-07-06 | Rapid multistrand pipe mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94107341A CN1039630C (en) | 1994-07-06 | 1994-07-06 | Rapid multistrand pipe mill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1100345A CN1100345A (en) | 1995-03-22 |
| CN1039630C true CN1039630C (en) | 1998-09-02 |
Family
ID=5032961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94107341A Expired - Fee Related CN1039630C (en) | 1994-07-06 | 1994-07-06 | Rapid multistrand pipe mill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1039630C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101920263A (en) * | 2010-07-29 | 2010-12-22 | 沈阳东方钢铁有限公司 | Method for producing medium and small aperture seamless steel tube by reducing and rolling hollow continuous cast tube blank |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102527723B (en) * | 2011-12-26 | 2015-04-01 | 宁波东重机械有限公司 | Four-wire multi-roll cold reducing mill |
| CN103894418B (en) * | 2012-12-27 | 2016-08-24 | 广东冠邦科技有限公司 | A kind of processing square-outside and round-inside tubing cold pilger mill |
| CN103433293B (en) * | 2013-08-23 | 2016-10-05 | 宁波东重机械有限公司 | Double-line cold rolled pipe |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3487675A (en) * | 1966-02-01 | 1970-01-06 | Sandvikens Jernverks Ab | Tube forming |
| US3650138A (en) * | 1968-09-28 | 1972-03-21 | Giuseppe Persico | Multiple tube-rolling pilger mills |
-
1994
- 1994-07-06 CN CN94107341A patent/CN1039630C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3487675A (en) * | 1966-02-01 | 1970-01-06 | Sandvikens Jernverks Ab | Tube forming |
| US3650138A (en) * | 1968-09-28 | 1972-03-21 | Giuseppe Persico | Multiple tube-rolling pilger mills |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101920263A (en) * | 2010-07-29 | 2010-12-22 | 沈阳东方钢铁有限公司 | Method for producing medium and small aperture seamless steel tube by reducing and rolling hollow continuous cast tube blank |
| CN101920263B (en) * | 2010-07-29 | 2012-06-06 | 沈阳东方钢铁有限公司 | Method for producing medium and small aperture seamless steel tube by reducing and rolling hollow continuous cast tube blank |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1100345A (en) | 1995-03-22 |
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