CN1055681A - Hot rail three roller combined piercing for seamless pipe - Google Patents

Abstract

A kind of hot-rolling metal seamless pipe three roller roll piercing mills, it is characterized in that this milling train is three-roll piercer and three-roll pipe mill to be united be one, form and a kind of perforation, tube rolling and expansion three process are combined into a procedure, go out the hot-rolling metal seamless pipe by a pierced billet of a three-roll piercer, its advantage and good effect are to have simplified processing technology, have reduced machine setting and floor space, saved investment, and, can also improve the quality of production tube, cut down the consumption of energy and metal loss.

Description

Hot rail three roller combined piercing for seamless pipe

The invention belongs to field of metallurgical machine, be specifically related to the associating punch in a kind of three roll pipe unit of producing the hot-rolling metal seamless pipe.

At present, both at home and abroad the hot-rolling metal finished product seamless pipe of producing all is to adopt the metal heating of pipe blank, bores a hole tube rolling, expansion, heating and machining process fixed, that alleviate such more complicated more then.Finish this several procedures, normally at punch, pipe mill, homogeneous state machine and fixed subtracting on the plug rolling unit that machine is formed or at punch, three-roll pipe mill and fixed subtracting carry out on the three roll pipe unit that machine is formed, the needed equipment of hot rolling type of these two kinds of technological process of productions is numerous and diverse, weight is big, floor space is many, equipment is relative superiority or inferiority in length and breadth, toward multiple chiasma, it is unimpeded to cause production procedure to be difficult for, the rolled piece temperature drop is big, need heating again, thermal losses is many, thereby affect the production efficiency of production hot-rolling metal Seamless Pipe and the further raising of product quality greatly, and, also increased electric energy and consumption of heat energy.

Purpose of the present invention, exactly in order to improve existing above-mentioned shortcoming of producing the hot-rolling metal Seamless Pipe, a kind of will the perforation proposed, tube rolling and expansion three process are combined into a procedure, realize that by one three roller roll piercing mill a pierced billet does not need again to heat again and directly decides, and just can process the new solution of the qualified seamless production tube of hot-rolling metal after alleviating.

The object of the present invention is achieved like this: three roller roll piercing mills are three-roll cross rolling mills, it is made up of foreground, main engine bed and backstage three parts, it is characterized in that three rolls are del and arrange, initiatively the frame in the seat is a kind of open top roll housing form by hydraulic locking; The machining tool pass is by perforated section, and tube rolling section and expansion section and round gauge section four parts are formed, and are finished by a pierced billet of one three roller roll piercing mill so can realize perforation, tube rolling and expansion three process.

Advantage of the present invention and good effect:

1, the present invention is owing to adopted perforation, tube rolling that three of former causes or two equipment of hot rolling are finished to be combined into one three roller roll piercing mill, to be finished by the pierced billet operation with expansion three roads (or two roads) operation, and, heating again in the middle of not needing, just can directly decide, subtract through, thereby, have that heat processing technique is simple, equipment is few, in light weight and floor space is little, advantage such as reduce investment outlay.

2, in the technical solution of the present invention, rolled piece be in an oblique milling pierced billet pass that is constituted by three homodromal rolls and one combination top, carry out continuous successively wearing, roll, equal three road manufacturing procedures, therefore, each is out of shape operation all is to carry out under the higher temperature and under the desirable three-dimensional compressive stress state, simultaneously, be not subjected to the frictional influence of downcomer again, therefore, the metal pipe surfaces externally and internally quality that pierced billet goes out is good, the dimensional accuracy height, and, can also reduce the thermal losses of electric energy and the thermal energy consumption and the metal of unit.

3, in the technical solution of the present invention, because rolled piece stress state in deformation process good (three dimension stress), temperature drop is little, so, optimum processes that some hardness height, plasticity are poor, the difficult deformable metal and the compo pipe of heat distortion temperature narrow range, but bearing steel pipe, stainless steel tube, aluminium and compo pipe thereof etc.

Description of drawings:

Fig. 1 is that three roller roll piercing mill main frame array structures are formed sketch.

Fig. 2 forms sketch for main engine bed structure in the main frame row.

Fig. 3 is a main engine bed mid frame apparatus structure sketch.

Fig. 4 is pierced billet instrument pass and flow of metal process schematic diagram.

Fig. 5 is a roller biting structural representation in the main engine bed.

Fig. 6 is for axially going out to manage the operating state schematic diagram that the backstage goes out each relevant functional unit of pipe process.

Fig. 7 forms sketch for the structure that push rod in the backstage props up blocking means.

Among Fig. 1: A-foreground, B-main engine bed, C-backstage,

Among Fig. 3: the I-rack locking location drawing.

II-frame open position figure.

Among Fig. 4: e-roll center line.

The f-rolling centerline. α-roll feed angle.

Among Fig. 6: after III-heat pipe base is all gone out to the backstage by pierced billet, prepare axially to go out the background state figure of pipe.

Each group centering roller of IV-supporting push rod all opens to maximum position, and the back card cuts the afterbody that device (being also referred to as sideboard) is embraced push rod, and only pinches the background state figure of pipe when running into back card section device backward with last group of pinch roll.

V-preceding card cuts device and blocks the push rod front portion, and dead bolt is opened, and a retaining head lifts, and the back card cuts a device and opens automatically, and four groups of pinch rolls pinch pipe simultaneously backward and pipe is thrown away background state figure on the runout table.

After VI-pipe was transferred to, the centering roller was all embraced push rod again, and a retaining head puts down, and the back card cuts device and sets upright the push rod afterbody automatically, and dead bolt is locked, and pinch roll is opened automatically, and each parts all resets, and prepares the background state figure of next root pipe of pierced billet.

Each label symbol explanation among the figure:

1-master's motor 2-connection is taken out device

3-associating decelerator 4-universal-joint spindle

5-material feeding platform 6-hydraulic steel pushing machine

7-entry conductor device 8-main engine bed (being 13 parts among Fig. 1)

Card cuts device 10-delivery guide before the 9-

11-roller (four groups) the 12-pinch roll (four rollers) of feeling relieved

Card cuts device (also claiming rear active baffle) 14-and props up retaining device behind the 13-

15-runout table 16-material toggling mechanism

17-backstage stand 18-push rod

19-combination top 20-roll device

21-roller biting 22-roll feed angle adjusting device

23-stand arrangement 24-roll is depressed device indicating

25-rotary drum locking device 26-protector

27-rail chair device 28-lower bearing bracket

Locking cylinder 30-left frame under the 29-

The right frame 32-of 31-goes up locking cylinder

33-overturning oil cylinder 34-pipe

35-roll 36-pipe

37-oil motor 38-bevel gear

39-worm screw 40-worm gear

41-housing screw 42-screw box

43-pressure-measuring head 44-pad

The quick rollback cylinder of 45-46-rotary drum

47-balance roll oil cylinder 48-balance roll pull bar

49-thrust bearing 50-dead bolt

51-props up a retaining 52-sliding support

53-hold-down support 54-hollow rotating shaft

55-screw rod 56-has the worm gear of nut

57-worm screw 58-worm reducer casing

59-balance sliding support spring 60-attaching nut

Embodiment explanation: as shown in Figure 1, main frame row are sequence number 8 by foreground A, main engine bed B() and backstage C three parts formed, wherein, foreground A comprises device compositions such as main motor 1, shaft coupling 2, associating decelerator 3, universal-joint spindle 4, material feeding platform 5, hydraulic steel pushing machine 6 and entry conductor 7, forms identical with the foreground of general punch; Main engine bed B(promptly 8) structure form as shown in Figure 2, also comprise the fast rollback mechanism of roll by roll device 20, roller biting 21(), roll feed angle debugging mode device 22, stand arrangement 23, depress institutes such as device indicating 24, rotary drum locking device 25, protector 26 and rail chair device 27 and form; Backstage C by preceding decometer cut device 9, delivery channel 10, centering roller 11, pinch roll 12, the back card cuts a device 13(and also claims rear active baffle), devices such as a retaining device 14, runout table 15, material toggling mechanism 16, backstage stand 17 form.Rack construction in the main engine bed as shown in Figure 3, its architectural feature is the open top roll housing that is made of lower bearing bracket 28, left frame 30 and right frame 31 etc. for it, and go up locking cylinder 32 by two following locking cylinders 29 and one and tightly be linked together, characteristic with closed frame, as after opening up and down locking cylinder, can left and right sides frame be opened (shown in II among Fig. 3) by two upset cylinders 33 again.Therefore, both guarantee the intensity and the side degree height of frame, be convenient to the replacing of milling train and the maintenance of main engine bed again.And pass that main engine bed middle punch instrument is formed and flow of metal process are as shown in Figure 4, and its pass is characterised in that the A-B section is the pipe section of nipping, and the B-C section is a perforated section, and the C-D section is a changeover portion, and the D-E section is the tube rolling section, and the E-F section is an expansion section, and the F-G section is a round gauge section; D is a roll perforated section pore throat diameter, d is a roll tube rolling sector hole larynx diameter, it is the instrument pass of three-roll piercer in the existing roller trio skew rolling production seamless pipe technology and three-roll pipe mill to be united be one, formed a kind of new associating pierced billet pass, be the A-B of roll 35, the perforation roll shape of the three-roll piercer in three sections compositions of B-C and C-D and the existing three roll piercing technology is identical, the D-E of roll 35, E-F, three sections compositions of F-G, identical with the tube rolling of the latter half of the roll of three-roll pipe mill in the existing three roll pipe technology and expansion and round gauge section roll shape, three rolls are mutually 120 ° of layouts in the space, (angle of roll center line e and rolling centerline f is α, claim the roll feed angle) and formed the circular bore of a variable cross-section with combination top 19, constituted the middle punch of hot-rolling metal seamless pipe process, tube rolling, the associating pierced billet pass of expansion and four kinds of different distortion of rule circle.Therefore, the pipe 34 that is heated behind associating pierced billet pass, can realize that just a pierced billet goes out 36 ° of hot-rolling metal seamless pipes.Figure 5 shows that the roller biting structural representation, its architectural feature is that the quick rollback of roll is both can adopt by by oil motor 37, the roll press down system that bevel gear 38, worm screw 39, worm gear 40, housing screw 41, screw box 42, pressure-measuring head 43, pad 44, quick rollback cylinder 45, rotary drum 46 are formed realizes, also can realize by the rapid oil extraction of quick rollback cylinder 45, so just can prevent when the light-wall pipe of pierced billet D/S＞12, pipe tail triangle steel-fastening phenomenon appears, (D is the outer warp of pipe, and S is the wall thickness of pipe).When the metal tube pierced billet during tail, can realize D/S＜12 to pipe by lifting three rolls rapidly, guarantee to manage tail and do not produce triangle steel-fastening phenomenon.

The present invention has the backstage that axially goes out pipe, not only had three-roll piercer, but also had the function that the three-roll pipe mill backstage is had, be illustrated in figure 6 as and axially go out to manage the backstage and go out each parts operating state schematic diagram of pipe process, before metal tube will be gone out roll 35 by pierced billet, a card section device 9 is opened at first, and metal tube is soon near before the centering roller 11 then; Centering roller 11 progressively is opened to the holding tube position more successively, shown in (III among Fig. 6)), when metal tube all by after pierced billet is to the backstage, again four groups of centering rollers 11 all are opened to maximum open position, (among Fig. 6 shown in the IV), simultaneously, back card cuts device 13 and embraces the afterbody of push rod 18 (beginning to impact when throw the back retaining 51 in the retaining device to prevent metal), and first pair of pinch roll pinches pipe 36 separately backward subsequently, pipe 36 pinched to touching back card card cut a device 13, card cuts the front portion that device 9 blocks the push rod 18 that is exposed again then, simultaneously, dead bolt 50 is opened, and a retaining 51 is put backward, the back card cuts device 13 and opens automatically, use all pinch rolls to clamp pipe 36 simultaneously at last, and throw away on the runout table 15 (among Fig. 6 shown in the V), subsequently, centering roller 11 is all embraced push rod 18 more immediately, pinch roll 12 is all opened, and a retaining 51 falls, and dead bolt 50 is locked, before card cut a device 9 and block push rod 18 immediately, prepare to carry out the perforation (among Fig. 6 shown in the VI) of next root pipe.Meanwhile, material toggling mechanism 16 transfers to pipe 36 from runout table 15, is sent to down east, road preface.Figure 7 shows that push rod props up the structure diagram of blocking means 14, its architectural feature is that a retaining 51 and the dead bolt 50 of supporting push rod 18 all is contained on the sliding support 52, and sliding support 52 is bearing on the hold-down support 53, and can move forward and backward along its slideway.Hold-down support 53 is by being bolted on the backstage stand 17, a dead bolt 50 and a retaining 51 can directly be realized its swing by oscillating oil cylinder, sliding support 52 is worm gear 56 rotations that have nut by worm screw 57, thereby drive the screw rod 55 that links together with sliding support 52, realize what it moved forward and backward.Retaining 51 can be pinned by dead bolt 50, guarantee combination top 19 steady operation on assigned position, when dead bolt 50 was arranged dotted line position, a retaining 51 just can allow to put backward to play dotted line position, at this moment, the metal pipe 36 that is gone out by pierced billet could realize axially going out pipe.

Claims (5)

1, a kind of hot-rolling metal seamless pipe three roller roll piercing mills, it is by foreground A, main engine bed B and backstage C three parts are formed, it is characterized in that this milling train is three-roll piercer and three-roll pipe mill to be united be one, form a kind of will the perforation, tube rolling and expansion three process are combined into a procedure, are gone out the machinery equipment of hot-rolling metal seamless pipe by a pierced billet of one three roller roll piercing mill.

2, hot-rolling metal seamless pipe three roller roll piercing mills as claimed in claim 1, the roll shape that it is characterized in that roll 35 in the main engine bed is by A-B, B-C, three sections roll parts of forming of C-D, identical with the roll profile of prior art three-roll piercer, by D-E, E-F, three sections roll parts of forming of F-G, tube rolling with the latter half of the roll of prior art three-roll pipe mill, expansion and round gauge section roll shape are identical, three rolls are in 120 ° of layouts in the space, and form the circular bore of a variable cross-section with combination top 19.

3, hot-rolling metal seamless pipe three roller roll piercing mills as claimed in claim 1, it is characterized in that three rolls are the del layout in the main engine bed, the stand arrangement 23 that adopts is the open top roll housings that are made of lower bearing bracket 28, left frame 30 and right frame 31, tightly link together by two following locking cylinders 29 and a last locking cylinder 32, after locking cylinder is opened up and down, by two of upset cylinder 33() left and right sides frame 30,31 can be opened.

4, hot-rolling metal seamless pipe three roller roll piercing mills as claimed in claim 1, the quick rollback that it is characterized in that roll both can adopt the roll press down system by being made up of oil motor 37, transmission bevel gear 38, worm screw 39, worm gear 40, housing screw 41, screw box 42, pressure-measuring head 43, pad 44, quick rollback cylinder 45, rotary drum 46 to realize, also can realize by the rapid oil extraction of quick rollback cylinder 45.

5, hot-rolling metal seamless pipe three roller roll piercing mills as claimed in claim 1, the retaining 51 and the dead bolt 50 that it is characterized in that supporting push rod all are contained on the sliding support 52, sliding support 52 is bearing in again on the hold-down support 53, and can move forward and backward along its slideway, hold-down support 53 is by being bolted on the stand 17 of back, sliding support 52 is to rotate the worm gear 56 that has nut by worm screw 57 to rotate, make the screw rod 55 that links together with sliding support 52 realize (sliding support 52 is to link together by nut 60 with screw rod 55) that it moves forward and backward, a dead bolt 50 and a retaining 51 can directly be realized its swing by oscillating oil cylinder, when dead bolt 50 is swung to solid line position, it promptly is retaining 51 position of the lock bit, when dead bolt 50 is swung to dotted line position, retaining 51 can also swing on the position of dotted line the position of promptly opening.

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