CN203991692U - A kind of three-roller guiding devices for three-roll pipe mill outlet - Google Patents
A kind of three-roller guiding devices for three-roll pipe mill outlet Download PDFInfo
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- CN203991692U CN203991692U CN201420471754.0U CN201420471754U CN203991692U CN 203991692 U CN203991692 U CN 203991692U CN 201420471754 U CN201420471754 U CN 201420471754U CN 203991692 U CN203991692 U CN 203991692U
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Abstract
The utility model is a kind of three-roller guiding devices for three-roll pipe mill outlet, include the frame that is arranged at roll line below, above a side of frame, be hinged with a bracket, the bottom of bracket is parallel to roll line direction lower steering roll A and lower steering roll B is installed, centre position, bracket bottom is hinged with a hydraulic cylinder A, the other end hinge of hydraulic cylinder A is contained in frame bottom, two spiral lifts are equipped with in frame bottom, the bilateral symmetry that is positioned at hydraulic cylinder A in bracket bottom is provided with a pair of arc, under the effect of hydraulic cylinder A, bracket is pressed on the top of corresponding two spiral lifts by a pair of arc, opposite side in frame is provided with separately a support, is hinged with a hydraulic cylinder B with displacement transducer on this support, and the other end of hydraulic cylinder B is hinged with a lever, and the other end of described lever is equipped with guide roller, the utility model is simple in structure, firm, has good maintenance accessi bility and operation stability.
Description
Technical field
The invention belongs to the auxiliary equipment that three-roll pipe mill is produced, especially a kind of three-roller guiding devices for three-roll pipe mill outlet.
Background technology
Three-roll pipe mill is a kind of important type of rolling seamless steel pipe, three-roll pipe mill is rotated rolloff by the hollow bloom (hereinafter referred to as workpiece) after perforation between roll and a long plug, in this process, workpiece rotates to have advanced with plug and subtracts wall and be out of shape and extended.For guaranteeing carrying out smoothly of the operation of rolling, the whipping of restriction workpiece and plug, must arrange guider along steel pipe direction of advance in milling train exit.Three rolls of three-roll pipe mill are connected with main speed reducer output shaft by universal-joint spindle respectively, by main motor, drive rotation.Guider is just arranged between pipe mill outlet and main gear reducer.This structural feature has determined that guider can only be arranged in the small space that three universal-joint spindles surround, and under the limited condition of installing space, functions of the equipments not only will meet manufacturing technique requirent but also must possess higher reliability.
Guider for three-roll pipe mill outlet mainly contains guide type and two types of guiding roll-types at present.
1) guide type guider: guide type guider adopts has guide groove certain length, that cross section takes the shape of the letter U along roll line direction, and is provided with cover plate above guide groove opening, forms one section of enclosure space.The workpiece extending out from pipe mill is just limited in rotation in this section of enclosure space, advances.The guider device structure of this structure is simple, cost is low, easy to maintenance, but the opening size of guide groove is non-adjustable aborning, must according to the excursion of workpiece external diameter, by certain, organize apart from preparing the some groups of guide grooves that opening size is different in advance, then before producing, according to given workpiece external diameter, select, install the guide groove of corresponding opening size.Therefore, this guider not only needs the standby guide groove of some, and changes guide groove and increased workman's labour intensity, the more important thing is between guide groove inner surface and hollow forging it is sliding friction, easily causes steel tube surface damage, affects product appearance quality.
2) guiding roller guide device: guiding roller guide device generally arranges along circumference the guide roller that three axis are parallel to roll line, one of top, two of belows centered by roll line; Distance between guide roller can be adjusted according to the external diameter of workpiece, and generally the inscribed circle diameter between three guide rollers is than the large 10mm of the external diameter of workpiece.The position of two lower rolls of guiding roller guide device maintains static after adjusting according to workpiece external diameter in advance, and top roll needs in process of production by instruction unpack or closure.In the operation of rolling, when workpiece is after pipe mill frame extends out, top roll is closed, rotates, advances, thereby prevent that workpiece and plug from throwing away in the space that workpiece can only be surrounded between three guide rollers; After rolling completes, top roll is upwards opened, and rise and fall roller rises and workpiece can be seen off.Though three-roller guiding devices structure is more complicated than guide type, but guide roller spacing is easy to adjust, between guide effect good and roller and workpiece, be rolling friction, be difficult for causing steel tube surface damage, be conducive to guarantee product appearance quality, so three-roller guiding devices is more widely used.
Three-roller guiding devices mainly contains following two kinds of patterns:
(1) have the three-roller guiding devices of long guide roller structure, this device lower roll is the long deflector roll (length can be rolled rear length close to workpiece) that two covers and rolling direction are arranged in parallel, and lays respectively at roll line both sides; Long deflector roll is drive roll, by motor, is driven and rotates with even rotating speed separately, can prevent that surface of the work from scratching and light-wall pipe generation surface deflections phenomenon; Long deflector roll base can be adjusted height up and down according to the different integral of workpiece external diameter; Top roll is arranged successively along roll line direction, by hydraulic cylinder, is driven and is lifted or depress.In the operation of rolling, when workpiece is after pipe mill frame extends out, top roll is depressed successively, rotates, advances in the space that workpiece surrounds between upper and lower guide roller; After rolling completes, top roll is upwards opened, and the conveying roller between two lower guide rolls rises, and workpiece is sent.The three-roller guiding devices of this pattern adopts the long guide roller of initiatively transmission to carry out whole process to workpiece and initiatively leads, and can reduce the relative friction between workpiece and long guide roller, and product surface quality is higher.
In order to give, arrange that long deflector roll leaves enough spaces, the three-roller guiding devices of this pattern needs rolling mill roller to take the kind of drive driving separately, by 3 main motors, pass through respectively reductor, 3 rolls of universal-joint spindle direct-drive, so floor space is large, equipment investment is high.In recent years the three-high pipe mill of the newly-built above specification of 200mm all adopts the guider of this structure.
(2) have the three-roller guiding devices of independent rack, this device is arranged some (general 3 left and right) independently three-roller guiding devices at regular intervals along rolling direction.Three guide rollers of every guider are driven roll, and two lower roll height are adjustable, and top roll can be driven and be lifted or depress by hydraulic cylinder; The in-built rolling bearing of driven roll, can be by workpiece driven rotary.Between two adjacent guiders, rise and fall roller is installed.In the operation of rolling, when workpiece is after pipe mill frame extends out, each frame top roll is depressed successively, and in the space that workpiece surrounds between upper lower steering roll, rotation is advanced, and after rolling completes, all top rolls are upwards opened, and rise and fall roller rises, and workpiece is sent.The three-roller guiding devices compact conformation of this form, floor space are little, are applicable to the three-roll pipe mill of roll central driving, be generally used for 200mm following in the three-high pipe mill of small dimension.
Referring to Fig. 1-Fig. 2, the three-roller guiding devices mechanism principle figure with independent rack for prior art, roll line direction perpendicular to paper inwards, 2 parallel being installed on bracket A1 in lower steering roll 2 left and right in Fig. 1, the left end of bracket 1 is articulated with frame (not shown) left side, and bottom and spiral lift A4 are hinged, and right side and connecting rod 6 are hinged, the other end of connecting rod 6 is connected with the rocking bar 8 that is articulated with frame right side, and rocking bar 8 downsides are installed with cam 9; The top of spiral lift A4 and bracket A1 are hinged, and bottom and frame are hinged; Hydraulic cylinder C5 is hinged to be installed on below frame inside, and the lever A10 on piston rod and frame right side is hinged and in hinged place, have roller 7, and the lever A10 other end is equipped with guide roller A3.
Bracket A1 swings around the pin joint in frame left side under the drive of spiral lift A4 together with 2 lower steering rolls 2, can regulate according to the external diameter of workpiece the height of 2 lower steering rolls 2; Bracket A1 changes the position of rocking bar 8 by connecting rod 6 when swinging, and the cam 9 of installing on rocking bar 8 also changes thereupon; Hydraulic cylinder C5 action can make guide roller A3 under the drive of lever A10, rise or decline.
In the operation of rolling, when workpiece process guider, hydraulic cylinder C5 stretches out, upper guide roller A3 depresses, until be positioned at when roller 7 on lever A10 contacts with cam 9, stop, the opening size of going up like this between guide roller A3 and lower steering roll 2 can be determined, while workpiece is finally just limited in rotating and advancing between three guide rollers.
This design can realize all technological requirements, but has following problem:
(1) connecting rod mechanism movement being connected with bracket 1 is too much secondary, and the high-frequency percussion load that workpiece produces in the operation of rolling very easily causes mechanism's bearing pin, axle end baffle plate and securing member everywhere to get loose;
(2) after upper guide roller A3 depresses, the shock loading alternating action that workpiece produces in the operation of rolling is on three guide rollers, because of installing space narrow and small, hydraulic cylinder C5 is size-constrained, thrust is not enough, cause connecting rod mechanism movement auxiliary air gap to be difficult to eliminate, the bearing in the spiral lift A4 of the oscillating bearing in each hinge and bracket A1 bottom is very easily damaged;
(3) because of the restriction of installation site, hydraulic cylinder C5 piston rod is longer, and the master arm length of lever A10 is too short, and while causing the work of hydraulic cylinder C5 piston rod, stability is bad, and hydraulic cylinder front end leaks frequent, and installation site is hidden, current check, maintenance difficulty;
(4) roller 7, cam 9 surface contact stress that play the role of positioning are large, and cam 9 very easily weares and teares, becomes flexible under clashing into frequently, cannot play reliably the effect of determining guide roller opening degree;
(5) be subject to the restriction of installing space, guider internal structure is very compact, causes the rigidity of the parts such as frame, connecting rod not enough, makes spiral lift A4 and hydraulic cylinder C5 faults frequent and inconvenient maintenance under violent high-frequency percussion load.
Summary of the invention
Object of the present invention is exactly the problem existing for above-mentioned guider, and a kind of three-roller guiding devices that is applicable to the three-roll pipe mill outlet of roll central driving is provided.
Concrete scheme of the present invention is: a kind of three-roller guiding devices for three-roll pipe mill outlet, include the frame that is arranged at roll line below, above a side of frame, be hinged with a bracket, the bottom of bracket is parallel to roll line direction lower steering roll A and lower steering roll B is installed, centre position, bracket bottom is hinged with a hydraulic cylinder A, the other end hinge of hydraulic cylinder A is contained in frame bottom, two spiral lifts are equipped with in frame bottom, its height can be recorded by rotary encoder, and two spiral lifts can be connected in mutually motor by shaft coupling and drive lower synchronous rotary, the bilateral symmetry that is positioned at hydraulic cylinder A in described bracket bottom is provided with a pair of arc, under the effect of hydraulic cylinder A, bracket is pressed on the top of corresponding two spiral lifts by described a pair of arc, opposite side in frame is provided with separately a support, on this support, be hinged with a hydraulic cylinder B with displacement transducer, the other end of hydraulic cylinder B is hinged with a lever, the middle part fulcrum of described lever is hinged in frame, " V " shape that two support arms of described lever are large opening arranges, and master arm length is greater than other end arm length, the other end of described lever is equipped with guide roller.
The appearance profile of frame described in the present invention is " Y " shape and arranges.
The present invention, owing to driving the hydraulic cylinder B of upper guide roller to be separately set in outside frame, has improved stress condition and the working environment of hydraulic cylinder, has reduced fault rate and has been convenient to Inspection and maintenance; Make hydraulic cylinder size increase becomes possibility simultaneously, and the increasing of the master arm length of upper guide roller lever, and force-bearing situation is very significantly improved, and the bearing capacity of whole mechanism been significantly enhanced.
After the expansion of guider inner space, two spiral lifts can be installed, and set up a hydraulic cylinder in order to eliminate drive gap, because of the pulling force of hydraulic cylinder A, to act on two active forces on lower steering roll consistent with workpiece all the time, so can eliminate bracket and spiral lift drive gap everywhere completely, greatly improve the ability that equipment bears high-frequency percussion load.
The present invention is simple in structure, firm, has good maintenance accessi bility and operation stability, and the important spare parts such as hydraulic cylinder, spiral lift can be realized online replacing, and the repair time also shortens greatly, has improved production efficiency and the economic benefit of enterprise.
Accompanying drawing explanation
Mechanism principle figure when Fig. 1 is existing three-roller guiding devices top roll open mode;
Mechanism principle figure when Fig. 2 is existing three-roller guiding devices top roll closure state;
Fig. 3 is the main apparent direction structural representation of the present invention;
Fig. 4 is the X-direction structural representation of Fig. 3;
Fig. 5 is the Y-direction structural representation of Fig. 3.
In figure: 1-bracket A, 2-lower steering roll, 3-upper guide roller A, 4-spiral lift A, 5-hydraulic cylinder C, 6-connecting rod, 7-roller, 8-rocking bar, 9-cam, 10-lever A, 11-roll line, 12-bracket, 13-lower steering roll A, 14-roll main transmission universal-joint spindle, 15-arc, 16-spiral lift, 17-hydraulic cylinder A, 18-frame, 19-upper guide roller, 20-lever, 21-lower steering roll B, 22-hydraulic cylinder B, 23-support, 24-shaft coupling, 25-universal-joint spindle.
The specific embodiment
Referring to Fig. 3-Fig. 5, the present invention is a kind of three-roller guiding devices for three-roll pipe mill outlet, include the frame 18 that is arranged at roll line 11 belows, above a side of frame, be hinged with a bracket 12, the bottom of bracket is parallel to roll line 11 directions lower steering roll A13 and lower steering roll B21 is installed, centre position, bracket bottom is hinged with a hydraulic cylinder A17, the other end hinge of hydraulic cylinder A is contained in frame bottom, two spiral lifts 16 are equipped with in frame bottom, its height can be recorded by rotary encoder, and two spiral lifts can be connected in mutually motor by shaft coupling 24 and drive lower synchronous rotary, the bilateral symmetry that is positioned at hydraulic cylinder A17 in described bracket 12 bottoms is provided with a pair of arc 15, under the effect of hydraulic cylinder A17, bracket 12 is pressed on the top of corresponding two spiral lifts 16 by described a pair of arc 15, opposite side in frame 18 is provided with separately a support 23, on this support, be hinged with a hydraulic cylinder B22 with displacement transducer, the other end of hydraulic cylinder B is hinged with a lever 20, the middle part fulcrum of described lever is hinged in frame, " V " shape that two support arms of described lever are large opening arranges, and master arm length is greater than other end arm length, the other end of described lever is equipped with guide roller 19.
The appearance profile of frame described in the present invention 18 is " Y " shape and arranges.
Referring to Fig. 3-Fig. 5, it should be noted that: although bracket 12 swings and can not guarantee that lower steering roll A13 is consistent with roll line 11 all the time with the incenter horizontal level of lower steering roll B21 around pin joint, but as long as reasonably determine the position of bracket pin joint, lower steering roll A and the installation site of lower steering roll B on bracket, guaranteeing under the incenter height prerequisite consistent with height of rolling line so, deviation between horizontal level and roll line can be controlled in very little scope and (be less than 2mm) in whole adjustment is interval, and the inscribed circle diameter between three guide rollers is generally than the large 10mm of workpiece external diameter left and right, so can not affect workpiece passes through smoothly.
Producing the preparatory stage, first operating personnel determine three inscribed circle diameters between guide roller according to the external diameter of workpiece, then this value is input in computer, computer is through computing, determine the corresponding extension elongation of hydraulic cylinder B22 with displacement transducer, and automatically adjust the height that spiral lift 16 makes all lower steering roll arrival appointments; Simultaneously can be according to the length of rolling workpiece, the interlock that links together of the universal-joint spindle of Jiang Duotai guider of the present invention by spiral lift two ends, so that many table apparatus are worked simultaneously.
Referring to Fig. 3-Fig. 5, before rolling, lower steering roll A13 and lower steering roll B21 are adjusted to specified altitude assignment, and hydraulic cylinder A17 piston rod is retracted, set and locking screw lift 16; Hydraulic cylinder B22 piston rod is retracted, and the guide roller on all guiders is all opened.
After rolling starts, workpiece extends out from pipe mill frame, after entering first guider one segment distance in frame exit, cold/hot metal detector is posted a letter, upper guide roller 19 is depressed, position is definite by the displacement transducer in hydraulic cylinder B22, and workpiece is limited in rotating and advancing in three spaces between guide roller.
Subsequently, workpiece moves on, and passes through successively each guider, and the upper guide roller of each guider is depressed by front and back order successively by said process, until all upper guide rollers are all depressed and remained to the operation of rolling, finishes.
After rolling completes, all upper guide rollers are together opened, and rise and fall roller rises, and workpiece is transported to subsequent processing.
Specification, size, the making material of the hydraulic cylinder A17 in the present invention, hydraulic cylinder B22, lever 20 and lever " V " shape openings of sizes etc. can be made adjustment according to actual conditions; these adjustment there is no the change in substantive principle, all belong to protection scope of the present invention.
Claims (2)
1. the three-roller guiding devices for three-roll pipe mill outlet, include the frame that is arranged at roll line below, above a side of frame, be hinged with a bracket, the bottom of bracket is parallel to roll line direction lower steering roll A and lower steering roll B is installed, centre position, bracket bottom is hinged with a hydraulic cylinder A, the other end hinge of hydraulic cylinder A is contained in frame bottom, two spiral lifts are equipped with in frame bottom, its height can be recorded by rotary encoder, and two spiral lifts can be connected in mutually motor by shaft coupling and drive lower synchronous rotary, it is characterized in that: the bilateral symmetry that is positioned at hydraulic cylinder A in described bracket bottom is provided with a pair of arc, under the effect of hydraulic cylinder A, bracket is pressed on the top of corresponding two spiral lifts by described a pair of arc, opposite side in frame is provided with separately a support, on this support, be hinged with a hydraulic cylinder B with displacement transducer, the other end of hydraulic cylinder B is hinged with a lever, the middle part fulcrum of described lever is hinged in frame, " V " shape that two support arms of described lever are large opening arranges, and master arm length is greater than other end arm length, the other end of described lever is equipped with guide roller.
2. a kind of three-roller guiding devices for three-roll pipe mill outlet according to claim 1, is characterized in that: the appearance profile of described frame is " Y " shape and arranges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420471754.0U CN203991692U (en) | 2014-08-21 | 2014-08-21 | A kind of three-roller guiding devices for three-roll pipe mill outlet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420471754.0U CN203991692U (en) | 2014-08-21 | 2014-08-21 | A kind of three-roller guiding devices for three-roll pipe mill outlet |
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| Publication Number | Publication Date |
|---|---|
| CN203991692U true CN203991692U (en) | 2014-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420471754.0U Withdrawn - After Issue CN203991692U (en) | 2014-08-21 | 2014-08-21 | A kind of three-roller guiding devices for three-roll pipe mill outlet |
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| CN (1) | CN203991692U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104148414A (en) * | 2014-08-21 | 2014-11-19 | 湖北理工学院 | Three-roll guide device applied to outlet of three-roll tube mill |
-
2014
- 2014-08-21 CN CN201420471754.0U patent/CN203991692U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104148414A (en) * | 2014-08-21 | 2014-11-19 | 湖北理工学院 | Three-roll guide device applied to outlet of three-roll tube mill |
| CN104148414B (en) * | 2014-08-21 | 2016-01-06 | 湖北理工学院 | A kind of three-roller guiding devices for three-roll pipe mill outlet |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141210 Effective date of abandoning: 20160106 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |