CN103056172A - Three-roll guide device for entrance of skew rolling mill for tubes - Google Patents
Three-roll guide device for entrance of skew rolling mill for tubes Download PDFInfo
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- CN103056172A CN103056172A CN2013100226056A CN201310022605A CN103056172A CN 103056172 A CN103056172 A CN 103056172A CN 2013100226056 A CN2013100226056 A CN 2013100226056A CN 201310022605 A CN201310022605 A CN 201310022605A CN 103056172 A CN103056172 A CN 103056172A
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Abstract
The invention discloses a three-roll guide device for an entrance of a skew rolling mill for tubes. The three-roll guide device comprises a frame A and a frame B, wherein the outer sides of the frame A and frame B are hinged to a lower roll hydraulic cylinder A and a lower roll hydraulic cylinder B, a lever A and a level B are hinged to the upper sided of the frame A and the frame B, a lower guide roll A and a lower guide roll B are arranged at one ends of lever A and level B which are close to the rolling line, the outer ends of the level A and the lever B are hinged to the piston rods of the lower roll hydraulic cylinder A and lower roll hydraulic cylinder B. A V-shaped roll rocker arm and a rocker are arranged above the level B on the frame B, the V-shaped roll rocker arm and the rocker are hinged to the frame B through the same hinge. An upper roll hydraulic cylinder A is hinged above the end of the rocker, a piston rod of the upper roll hydraulic cylinder A is hinged to an upper arm of the V-shaped roll rocker and a lower guide roll is arranged at an upper arm of the V-shaped roll rocker. The frame B is provided with an upper roll hydraulic cylinder B, and a piston rod of upper roll hydraulic cylinder B is hinged to the end of the rocker. The lower roll hydraulic cylinder A, the upper roll hydraulic cylinder B and the lower roll hydraulic cylinder B are all differential hydraulic cylinders with displacement sensors. The three-roll guide device is simple and firm in structure, and both equipment reliability and maintainability are improved.
Description
Technical field
The present invention relates to the auxiliary equipment that diagonal rolling pipe mill is produced, especially a kind of three-roller guiding devices for the diagonal rolling pipe mill entrance.
Background technology
Diagonal rolling pipe mill is a kind of important type that hot rolled seamless steel tube is produced, and what be most widely used at present has two roll tube rolling mills and two kinds of patterns of three-roll pipe mill, for the production of the high accuracy hot rolled seamless steel tube.
Diagonal rolling pipe mill is arranged in after the punch, will be rotated rolloff between roll and a long plug through the hollow bloom (hereinafter referred to as hollow forging) after the perforation, makes it extension, attenuation.For guaranteeing carrying out smoothly of the operation of rolling, the whipping of restriction hollow forging and plug is provided with some assembly guidances at the inlet of rolling mill place at regular intervals along rolling direction.The unit that just comes into operation at present, inlet guide device mainly contains guide type and two types of guiding roll-types, the guide type guider is owing to be sliding friction between guide groove concave surface and the hollow forging, cause easily the steel tube surface damage, affect the product appearance quality, gradually be directed to roller guide device and replaced.The guiding roller guide device utilizes the space between three guide rollers that are circular layout that hollow forging and plug are led mostly, and monoblock type and split type two kinds of patterns are structurally arranged.
The frame of monoblock type three-roller guiding devices is an integral body, and the aperture position by between hydraulic cylinder-three guide rollers of linkage control adopts the pipe mill entrance of this guider to send hollow forging to pipe mill by the frictional force of active roller-way or pinch roll; And the hollow forging propulsion plant is arranged in the split type three-roller guiding devices roll line both sides that are placed between the frame, can directly hollow forging and plug be pushed pipe mill, and pipe mill is obtained than the former better bite condition.
Referring to Fig. 1, Fig. 2 and Fig. 3, traditional split type three-roller guiding devices includes frame A11 and the frame B29 of the roll line both sides that are placed in, the inside of frame A11 and frame B29 is hinged with respectively lower roll hydraulic cylinder A15 and the lower roll hydraulic cylinder B1 that is arranged symmetrically with, the top of frame A11 and frame B29 is hinged with respectively lever A17 and the lever B26 that is arranged symmetrically with, lever A17 and lever B26 are equipped with respectively lower steering roll A9 and lower steering roll B8 by roll line one end, and a lever A17 and lever B26 end in the outer part is hinged with the piston rod of lower roll hydraulic cylinder A15 and lower roll hydraulic cylinder B1 respectively.By roll line one side bottom left block A20 and right block A22 are housed respectively at lever A17 and lever B26, left cam A16 and right cam A27 are equipped with respectively in the bottom in the outer part on lever A17 and lever B26, the below of left cam A16 is positioned at the inside that frame A11 below inner and right cam A27 is positioned at frame B29 core rod position lift 14 and core rod position lift 2 is housed respectively, and left cam A16 and right cam A27 be the screw mandrel layout of corresponding core rod position lift 14 and core rod position lift 2 respectively.Frame A11 also is hinged with spacing hydraulic cylinder A13, frame B29 also is hinged with spacing hydraulic cylinder B3, the external spacing connecting rod A19 who fills with the coaxial hinge of lever A17 of spacing hydraulic cylinder A13, the end side of spacing connecting rod A19 is equipped with the left block B10 of corresponding layout with left block A20, the external spacing connecting rod B6 who fills with the coaxial hinge of lever B26 of spacing hydraulic cylinder B3, the end side of spacing connecting rod B6 is equipped with the right block B7 of corresponding layout with right block A22; Left cam B18 and right cam B5 are housed respectively on spacing connecting rod A19 and the spacing connecting rod B6, and left cam B18 below is positioned at the inside of frame A11 and hollow forging position lift 12 and hollow forging position lift 4 are equipped with respectively in inside that right cam B5 below is positioned at frame 29.The top that is positioned at lever B26 on the frame B29 also is hinged with a lever C23, the medial end of lever C23 is equipped with guide roller 21, lever C23 top is positioned at and also is hinged with a top roll hydraulic cylinder 28 on the frame B29, the middle part of the piston rod of top roll hydraulic cylinder 28 and lever C23 is hinged, the exterior bottom of lever C23 is equipped with briquetting 25, and briquetting 25 below correspondences are positioned at cam C24 is housed on the lever B26.
The in-built rolling bearing (not shown) of above-mentioned three guide rollers can be rotated around roll shaft under the frictional force effect of hollow forging or plug in the operation of rolling.
Be provided with some spaced apart three-roller guiding devices at the inlet of rolling mill place along rolling direction, the core rod position lift of each three-roller guiding devices and hollow forging position lift respectively link together by universal joint shaft and by motor-driven work, the core rod position lift of each three-roller guiding devices and hollow forging position lift can be realized separately concentrating and regulate during adjusting.
Three guide rollers of every three-roller guiding devices are pressed circle distribution centered by roll line.Opening degree size between the guide roller can be according to the external diameter adjustment of hollow forging and plug, and the inscribed circle diameter between general three guide rollers gets final product than each large 10mm of external diameter of hollow forging and plug.
The opening degree of three guide rollers of every three-roller guiding devices has three positions by size: standard-sized sheet position, hollow forging position and core rod position.
When hollow forging during from the side direction charging, three guide rollers are in " standard-sized sheet position ".
In the process of mill milling steel pipe, when hollow forging process three-roller guiding devices, three guide rollers are in " hollow forging position ", the empty hollow forging of embracing; When plug process three-roller guiding devices, three guide rollers are in " core rod position ", the empty plug of embracing.
In the whole operation of rolling, when certain three-roller guiding devices of hollow forging propulsion plant process, three guide rollers of this guider also will be in " standard-sized sheet position ", so that the hollow forging propulsion plant can be passed through smoothly.
Fig. 1 is the fundamental diagram that traditional three-roller guiding devices is positioned at standard-sized sheet position state, and lower roll hydraulic cylinder A15, spacing hydraulic cylinder A13, lower roll hydraulic cylinder B1, spacing hydraulic cylinder B3 all stretch out, and only has top roll hydraulic cylinder 28 to retract.The screw mandrel of the screw mandrel of the screw mandrel of the screw mandrel of left cam A16 and core rod position lift 14, left cam B18 and hollow forging position lift 12, right cam A27 and core rod position lift 2, right cam B5 and hollow forging position lift 4 and briquetting 25 and cam C24 all are in separated position.At this moment, upper guide roller 21, lower steering roll A9 and lower steering roll B8 all are positioned at the standard-sized sheet bit position.
Fig. 2 is the fundamental diagram that traditional three-roller guiding devices is positioned at the core rod position state, lower roll hydraulic cylinder A15, spacing hydraulic cylinder A13, lower roll hydraulic cylinder B1, spacing hydraulic cylinder B3 all retracts, only have top roll hydraulic cylinder 28 to stretch out, the screw mandrel of left cam A16 and core rod position lift 14, the screw mandrel of left cam B18 and hollow forging position lift 12, the screw mandrel of right cam A27 and core rod position lift 2, the screw mandrel of right cam B5 and hollow forging position lift 4 and briquetting 25 and cam C24 all are in contact condition, control the turned position of lever A17 and lever B26 by the screw mandrel height of regulating two core rod position lifts, and then control the size of three guide roller opening degrees.At this moment, upper guide roller 21, lower steering roll A9 and lower steering roll B8 all are positioned at the plug bit position.
Fig. 3 is the fundamental diagram that traditional three-roller guiding devices is positioned at hollow forging position state, lower roll hydraulic cylinder A15, lower roll hydraulic cylinder B1 and top roll hydraulic cylinder 28 all stretch out, spacing hydraulic cylinder A13 and spacing hydraulic cylinder B3 retract, the screw mandrel of the screw mandrel of left cam A16 and core rod position lift 14 and right cam A27 and core rod position lift 2 all is in separated position, the screw mandrel of left cam B18 and hollow forging position lift 12, the screw mandrel of right cam B5 and hollow forging position lift 4, left block A20 and left block B10 and right block A22 and right block B7 all are in contact condition, control the operating position of block by the screw mandrel height of regulating hollow forging position lift, by the extreme position of the residing Position Control three roller foldings of block.At this moment, upper guide roller 21, lower steering roll A9 and lower steering roll B8 all are positioned at the hollow forging bit position.
There is following problem in this traditional three-roller guiding devices: 1. make the apparatus arrangement of whole pipe mill entrance area very intensive, equipment failure rate is high, and is maintainable poor; 2. the cam face contact stress that plays the role of positioning is large, and cam can't play the effect of determining the guide roller opening degree reliably very easily wearing and tearing under the bump frequently, becoming flexible; 3. the own complex structure of three-roller guiding devices, and each hydraulic cylinder, hollow forging position lift and core rod position lift all are contained in the inside of frame, cause to change online hydraulic cylinder, must pull down whole guider processed offline, replacing wherein any one parts all will be disintegrated frame, thereby has greatly prolonged the repair time; 4. guide roller adopts rolling bearing, and is very easily stuck under high temperature, shock loading, affects steel tube surface quality.Therefore, a kind of three-roller guiding devices that can address the above problem well of design extremely is necessary.
Summary of the invention
Purpose of the present invention be exactly to solve that traditional three-roller guiding devices complex structure, equipment failure rate are higher, maintainability is poor, can not accurately control guide roller opening degree size, inspection and repair shop take time long, easily steel tube surface quality is impacted and causes the problems such as the apparatus arrangement of whole pipe mill entrance area is very intensive, a kind of three-roller guiding devices for the diagonal rolling pipe mill entrance is provided.
Concrete scheme of the present invention is: a kind of three-roller guiding devices for the diagonal rolling pipe mill entrance, the frame A and the frame B that comprise the roll line both sides that are placed in, the outside of frame A and frame B is hinged with respectively lower roll hydraulic cylinder A and the lower roll hydraulic cylinder B that is arranged symmetrically with, be hinged with respectively the lever A and the lever B that are arranged symmetrically with on frame A and the frame B, lever A and lever B are equipped with respectively lower steering roll A and lower steering roll B by an end of roll line, and a lever A and lever B end in the outer part is hinged with the piston rod of lower roll hydraulic cylinder A and lower roll hydraulic cylinder B respectively; It is characterized in that: frame B be positioned at lever B above V-arrangement roller arm and rocking bar are housed, the centre of V-arrangement roller arm and the head of rocking bar are contained on the frame B by same bearing pin hinge; The afterbody top of rocking bar is hinged with top roll hydraulic cylinder A, and the upper arm ends of the piston rod of top roll hydraulic cylinder A and V-arrangement roller arm is hinged, and the lower arm ends of V-arrangement roller arm is equipped with guide roller; Be hinged with top roll hydraulic cylinder B be positioned at the afterbody of rocking bar at frame B below, the piston rod of top roll hydraulic cylinder B and rocking bar afterbody below are hinged; Wherein lower roll hydraulic cylinder A, top roll hydraulic cylinder B and lower roll hydraulic cylinder B are the differential hydro cylinder with displacement transducer.
In order to make things convenient for the dismounting of hydraulic cylinder, realize fast online replacing of hydraulic cylinder, the cylinder body of lower roll hydraulic cylinder A is contained on the frame A by hydraulic cylinder bearing hinge among the present invention, and the cylinder body of top roll hydraulic cylinder B and lower roll hydraulic cylinder B all is contained on the frame B by hydraulic cylinder bearing hinge.
In order to make the present invention can adapt to high temperature and the larger abominable working environment of shock loading, upper guide roller of the present invention, lower steering roll A and lower steering roll B all are installed on V-arrangement roller arm, lever A and the lever B by roll shaft and sliding bearing.
The present invention has cancelled lift-cam positioning apparatus complicated in traditional three-roller guiding devices, has simplified frame for movement, has improved the reliability and maintainability of equipment.Also hydraulic cylinder is contained in the frame outside by hydraulic cylinder bearing hinge simultaneously, the bolt that only bearing pin between piston rod and the lever need be extracted, unclamped out the hydraulic cylinder bearing when hydraulic cylinder breaks down can realize changing online the parts of hydraulic cylinder or hydraulic cylinder, the hydraulic cylinder mounting or dismounting become convenient, repair time has also shortened greatly, has brought huge economic benefit to enterprise.
Description of drawings
Fig. 1 is the fundamental diagram that traditional three-roller guiding devices is in " standard-sized sheet position " state;
Fig. 2 is the fundamental diagram that traditional three-roller guiding devices is in " core rod position " state;
Fig. 3 is the fundamental diagram that traditional three-roller guiding devices is in " hollow forging position " state;
Fig. 4 is main cutaway view of the present invention;
Fig. 5 is right view of the present invention;
Fig. 6 is the A-A cutaway view of Fig. 4;
Fig. 7 is the B-B cutaway view of Fig. 4.
Among the figure: 1-lower roll hydraulic cylinder B, 2-core rod position lift, the spacing hydraulic cylinder B of 3-, 4-hollow forging position lift, the right cam B of 5-, the spacing connecting rod B of 6-, the right block B of 7-, 8-lower steering roll B, 9-lower steering roll A, the left block B of 10-, 11-frame A, 12-hollow forging position lift, the spacing hydraulic cylinder A of 13-, 14-core rod position lift, 15-lower roll hydraulic cylinder A, the left cam A of 16-, 17-lever A, the left cam B of 18-, the spacing connecting rod A of 19-, the left block A of 20-, the upper guide roller of 21-, the right block A of 22-, 23-lever C, 24-cam C, 25-briquetting, 26-lever B, the right cam A of 27-, 28-top roll hydraulic cylinder, 29-frame B, 30-lower roll hydraulic cylinder A, 31-hydraulic cylinder bearing, 32-frame A, 33-lever A, 34-lower steering roll A, 35-lower steering roll B, the upper guide roller of 36-, 37-V shape roller arm, the 38-bearing pin, 39-rocking bar, 40-top roll hydraulic cylinder A, 41-lever B, 42-top roll hydraulic cylinder B, 43-frame B, 44-lower roll hydraulic cylinder B, 45-roll shaft, 46-sliding bearing.
The specific embodiment
Referring to Fig. 4, Fig. 5, Fig. 6 and Fig. 7, the present invention includes the frame A32 of the roll line both sides that are placed in and the centre that frame B43(roll line is positioned at three rollers), the outside of frame A32 and frame B43 is hinged with respectively lower roll hydraulic cylinder A30 and the lower roll hydraulic cylinder B44 that is arranged symmetrically with, the top of frame A32 and frame B43 is hinged with respectively lever A33 and the lever B41 that is arranged symmetrically with, lever A33 and lever B41 are equipped with respectively lower steering roll A34 and lower steering roll B35 by an end of roll line, and a lever A33 and lever B41 end in the outer part is hinged with the piston rod of lower roll hydraulic cylinder A30 and lower roll hydraulic cylinder B44 respectively; Particularly: frame B43 be positioned at lever B41 above V-arrangement roller arm 37 and rocking bar 39 are housed, the centre of V-arrangement roller arm 37 and the head of rocking bar 39 cut with scissors simultaneously by same bearing pin 38 and are contained on the frame B43; The afterbody top of rocking bar 39 is hinged with top roll hydraulic cylinder A40, and the upper arm ends of the piston rod of top roll hydraulic cylinder A40 and V-arrangement roller arm 37 is hinged, and the lower arm ends of V-arrangement roller arm 37 is equipped with guide roller 36; Be hinged with top roll hydraulic cylinder B42 be positioned at the afterbody of rocking bar 39 at frame B43 below, the piston rod of top roll hydraulic cylinder B42 and rocking bar 39 afterbodys below are hinged; Wherein lower roll hydraulic cylinder A30, top roll hydraulic cylinder B42 and lower roll hydraulic cylinder B44 are the differential hydro cylinder with displacement transducer.
Referring to Fig. 4, Fig. 5 and Fig. 6, the cylinder body of the hydraulic cylinder of lower roll described in present embodiment A30 is contained on the frame A32 by hydraulic cylinder bearing 31 hinges, and the cylinder body of top roll hydraulic cylinder B42 and lower roll hydraulic cylinder B44 all is contained on the frame B43 by hydraulic cylinder bearing 31 hinges.
Referring to Fig. 6 and Fig. 7, upper guide roller 36, lower steering roll A34 and lower steering roll B35 all are installed on V-arrangement roller arm 37, lever A33 and the lever B41 by roll shaft 45 and sliding bearing 46 described in the present embodiment.
During concrete operations, operating personnel determine the upward inscribed circle diameter between guide roller 36, lower steering roll A34 and three guide rollers of lower steering roll B35 according to the external diameter of hollow forging and plug, be input in the computer by keyboard, computer draws three of lower roll hydraulic cylinder A30, top roll hydraulic cylinder B42 and lower roll hydraulic cylinder B44 with extension elongation corresponding to the hydraulic cylinder of displacement transducer by computing.After the data input, these positions are no longer adjusted.
When rolled steel tube, the inscribed circle diameter between upper guide roller 36, lower steering roll A34 and three guide rollers of lower steering roll B35 will be determined by top roll hydraulic cylinder B42, lower roll hydraulic cylinder A30 and three hydraulic cylinder extension elongations with displacement transducer of lower roll hydraulic cylinder B44:
When " hollow forging position ", top roll hydraulic cylinder A40 all stretches out and maintains static; Lower roll hydraulic cylinder A30, lower roll hydraulic cylinder B44 and top roll hydraulic cylinder B42 stretch out, the displacement sensor extension elongation, feed back to computer system, when with " the hollow forging position " set when corresponding extension elongation equates, controlling the hydraulic proportion valve valve port of these hydraulic cylinders closes, the hydraulic lock locking, respectively the hydraulic cylinder piston with displacement transducer will stop at assigned address, the opening of upper guide roller 36, lower steering roll A34 and three guide rollers of lower steering roll B35 is exactly " the hollow forging position " set in advance, the empty hollow forging of embracing.
The situation of " core rod position " is similar with " hollow forging position ", and top roll hydraulic cylinder A40 stretches out and maintains static; Lower roll hydraulic cylinder A30, lower roll hydraulic cylinder B44 and three hydraulic cylinders of top roll hydraulic cylinder B42 stretch out, the displacement sensor extension elongation, feed back to computer system, when equating with " core rod position " corresponding extension elongation of setting, the hydraulic lock locking, respectively the hydraulic cylinder piston with displacement transducer will stop at assigned address, and the opening of upper guide roller 36, lower steering roll A34 and three guide rollers of lower steering roll B35 is exactly " core rod position " set in advance, the empty plug of embracing.
During material loading, the necessary standard-sized sheet of upper guide roller 36, lower steering roll A34 and three guide rollers of lower steering roll B35, hollow forging will be held the alignment roll line by carrying roller; In addition, in the operation of rolling, when the hollow forging propulsion plant when the guider, three guide rollers also must standard-sized sheet, to avoid knocking the hollow forging propulsion plant.When " standard-sized sheet position ", top roll hydraulic cylinder A40 all retracts, and lower roll hydraulic cylinder A30 and lower roll hydraulic cylinder B44 all stretch out, and the state that top roll hydraulic cylinder B42 can keep previous action rests on the position of " hollow forging position " or " core rod position "
The selection of size, specification and the material of lower roll hydraulic cylinder A30 of the present invention, hydraulic cylinder bearing 31, frame A32, lever A33, lower steering roll A34, lower steering roll B35, upper guide roller 36, V-arrangement roller arm 37, bearing pin 38, rocking bar 39, top roll hydraulic cylinder A40, lever B41, top roll hydraulic cylinder B42, frame B43, lower roll hydraulic cylinder B44, roll shaft 45 and sliding bearing 46; can adjust according to actual needs; these adjustment there is no the change of substantive principle, all belong to protection scope of the present invention.
Claims (3)
1. three-roller guiding devices that is used for the diagonal rolling pipe mill entrance, the frame A and the frame B that comprise the roll line both sides that are placed in, the outside of frame A and frame B is hinged with respectively lower roll hydraulic cylinder A and the lower roll hydraulic cylinder B that is arranged symmetrically with, be hinged with respectively the lever A and the lever B that are arranged symmetrically with on frame A and the frame B, lever A and lever B are equipped with respectively lower steering roll A and lower steering roll B by an end of roll line, and a lever A and lever B end in the outer part is hinged with the piston rod of lower roll hydraulic cylinder A and lower roll hydraulic cylinder B respectively; It is characterized in that: frame B be positioned at lever B above V-arrangement roller arm and rocking bar are housed, the centre of V-arrangement roller arm and the head of rocking bar are contained on the frame B by same bearing pin hinge; The afterbody top of rocking bar is hinged with top roll hydraulic cylinder A, and the upper arm ends of the piston rod of top roll hydraulic cylinder A and V-arrangement roller arm is hinged, and the lower arm ends of V-arrangement roller arm is equipped with guide roller; Be hinged with top roll hydraulic cylinder B be positioned at the afterbody of rocking bar at frame B below, the piston rod of top roll hydraulic cylinder B and rocking bar afterbody below are hinged; Wherein lower roll hydraulic cylinder A, top roll hydraulic cylinder B and lower roll hydraulic cylinder B are the differential hydro cylinder with displacement transducer.
2. a kind of three-roller guiding devices for the diagonal rolling pipe mill entrance according to claim 1, it is characterized in that: the cylinder body of described lower roll hydraulic cylinder A is contained on the frame A by hydraulic cylinder bearing hinge, and the cylinder body of top roll hydraulic cylinder B and lower roll hydraulic cylinder B all is contained on the frame B by hydraulic cylinder bearing hinge.
3. a kind of three-roller guiding devices for the diagonal rolling pipe mill entrance according to claim 1, it is characterized in that: described upper guide roller, lower steering roll A and lower steering roll B all are installed on V-arrangement roller arm, lever A and the lever B by roll shaft and sliding bearing.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310022605.6A CN103056172B (en) | 2013-01-22 | 2013-01-22 | Three-roll guide device for entrance of skew rolling mill for tubes |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310022605.6A CN103056172B (en) | 2013-01-22 | 2013-01-22 | Three-roll guide device for entrance of skew rolling mill for tubes |
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| CN103056172A true CN103056172A (en) | 2013-04-24 |
| CN103056172B CN103056172B (en) | 2014-08-13 |
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