CN104668875B - The cylindrical shell flaw detection that a kind of axial float is controlled and turning rolls - Google Patents

The cylindrical shell flaw detection that a kind of axial float is controlled and turning rolls Download PDF

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Publication number
CN104668875B
CN104668875B CN201410841098.3A CN201410841098A CN104668875B CN 104668875 B CN104668875 B CN 104668875B CN 201410841098 A CN201410841098 A CN 201410841098A CN 104668875 B CN104668875 B CN 104668875B
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CN
China
Prior art keywords
roller
bearing
eccentric bushing
axial float
cylindrical shell
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Expired - Fee Related
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CN201410841098.3A
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Chinese (zh)
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CN104668875A (en
Inventor
周玉林
褚宏鹏
王洪彪
孙通帅
陈龙龙
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Yanshan University
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Yanshan University
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Priority to CN201410841098.3A priority Critical patent/CN104668875B/en
Publication of CN104668875A publication Critical patent/CN104668875A/en
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Publication of CN104668875B publication Critical patent/CN104668875B/en
Expired - Fee Related legal-status Critical Current
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/04Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
    • B23K37/053Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/04Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
    • B23K37/047Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work moving work to adjust its position between soldering, welding or cutting steps
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/22Details, e.g. general constructional or apparatus details
    • G01N29/26Arrangements for orientation or scanning by relative movement of the head and the sensor
    • G01N29/27Arrangements for orientation or scanning by relative movement of the head and the sensor by moving the material relative to a stationary sensor

Abstract

The cylindrical shell flaw detection that axial float is controlled and a turning rolls, it mainly comprises guiderail base and four removable roll wheel assemblies.Roller shaft in roll wheel assembly and roller connect firmly, and respectively bearing assembly are housed between the two ends of roller shaft and eccentric bushing, and the interior circular hole of eccentric bushing does not overlap with cylindrical center, has an eccentric amount e; Be separately installed with needle bearing between eccentric bushing and bearing block circular hole, eccentric bushing be fixedly connected with worm gear, and with the worm engaging be arranged in bearing block; This worm screw can manually or Mechanical Driven.When after the given input of worm screw, worm gear and eccentric bushing is driven to rotate, change the relative position that roller shaft two ends support, and then change the pose of roller axis, thus control the axial float of the cylindrical shell be placed on turning rolls, realize controlling axial float regulative mode various, regulate sensitive, control that axial float mechanical adjusting mechanism is simple, volume is little, bearing capacity is large.

Description

The cylindrical shell flaw detection that a kind of axial float is controlled and turning rolls
Technical field
The present invention relates to a kind of ultrasonic examination and welding auxiliary equipment.
Technical background
Along with the fast development in the fields such as China's oil, chemical industry, nuclear power, thermoelectricity, to maximizing, the demand of large wall thickness pressure vessel also increasing day by day, also more and more higher to the requirement of the welding quality between the quality of pressure container cylinder and cylindrical shell and welding efficiency.Turning rolls is exactly a kind of servicing unit be applied in large-size cylinder body welding production, under the driving of turning rolls active roller, cylindrical shell on turning rolls continuous low speed, steadily to replace rotation, can automatic welding be realized, drastically increase welding efficiency and weldquality; Separately cylindrical shell dispatch from the factory last as need that ultrasonic flaw detection inspection is carried out to cylindrical shell and carry out Mass Control, cylindrical shell flaw detection turning rolls is exactly a kind of servicing unit be applied in automatic ultrasonic inspection, under the driving of cylindrical shell flaw detection turning rolls active roller, cylindrical shell on turning rolls continuous high speed, steadily to replace rotation, the automatic flaw detection of cylindrical shell can be realized, improve the efficiency of cylindrical shell flaw detection.
Great mass of data research and analysis shows: the main cause of cylindrical shell generation axial float be the axis of each roller of tubular axis and turning rolls not parallel or in short-term, instantaneously not parallelly to cause, namely there is angle between tubular axis and roller axis, cylindrical shell is made no longer to do simple circular motion, but motion of spinning, cause the axial float of cylindrical shell.The angle between roller axis and tubular axis is changed if can take measures timely, cylindrical shell is made to replace back and forth between left-lateral movement and dextral motion and balance, or motion of no longer spinning, so the axial movement value of cylindrical shell will be stabilized in the error of permission, or axial float does not occur; Also by the angle between adjustment roll wheel axis and tubular axis, cylindrical shell can be made to the some directions play determined, and is equipped with spacing top roller in the direction in which, cylindrical shell is accurately located.
There are many turning rolls factories both at home and abroad at present, the turning rolls that PEMA company as Finland produces, what it controlled the employing of workpiece axial float mechanical adjusting mechanism is unilateral deflection formula governor motion, swung in horizontal plane by Driven by Hydraulic Cylinder roller support, thus change roller axis attitude, as shown in Figure 7, its essence belongs to unilateral deflection formula regulative mode; The turning rolls that gondola ANSALDO company produces, it controls workpiece axial float mechanical adjusting mechanism and adopts lever principle, roller is placed on an eccentric shaft, with Driven by Hydraulic Cylinder eccentric shaft doing plane rocking perpendicular in the plane of axis of workpiece, as shown in Figure 8, its essence belongs to lift regulative mode; Chinese patent (notification number: CN101780622A) discloses a kind of ball screw jacking type automatic anti-flee wheel shelf, it controls workpiece axial float mechanical adjusting mechanism and adopts lever principle, roller is placed on lever, lever end is equipped with ball screw, make roller doing plane rocking perpendicular in the plane of tubular axis by motor driven ball screw mandrel, as shown in Figure 9, its essence belongs to lift regulative mode.
At present, the mechanical adjustment mode that turning rolls controls axial float is all the axial location of single change cylindrical shell or the own axes position of roller, thus the angle changed between tubular axis and roller axis, the relative position relation between four rolling and cylindrical shell cannot be coordinated during adjustment simultaneously, the contact between cylindrical shell and roller is made to occur unbalance loading, sliding friction is there is between cylindrical shell and roller, affect drum surface quality, and existing control axial float mechanical adjusting mechanism volume is larger, regulative mode is single, sensitivity is poor, mechanical adjusting mechanism generally can only be applied on return idler, regulating power for heavy turning rolls is larger, seriously limit its application in engineering practice.
Summary of the invention
The cylindrical shell flaw detection that the object of the present invention is to provide a kind of axial float controlled and turning rolls, the present invention controls the variation of axial float regulative mode, spatialization, adjustment are sensitive; Control axial float mechanical adjusting mechanism is simple, volume is little, bearing capacity is large, is applicable to driving and driven roller simultaneously; Cylindrical shell and roller good contact can be ensured while control cylindrical shell axial float.
Technical scheme of the present invention is specific as follows:
The present invention mainly comprises equipment guiderail base and four removable roll wheel assemblies, and described equipment guiderail base comprises two longitudinal rails, two cross slide waies.Wherein, two longitudinal rails are fixed on ground, are located in the same horizontal plane, arranged parallel to each other, shared load; Two cross slide waies are arranged on two longitudinal rails, and one is fixing cross slide way, and another is can the cross slide way of longitudinally guide rail movement, to adapt to the length of different cylindrical shell.Each cross slide way is provided with two roll wheel assemblies of cross slide way lengthwise centers line symmetry, this roll wheel assembly can transversely move by guide rail, by regulating the distance between two roll wheel assemblies, to adapt to the cylindrical shell of different-diameter.Each roll wheel assembly is provided with and controls axial float mechanical adjusting mechanism, can regulate the pose of each roller axis, controls cylindrical shell axial float.This roll wheel assembly mainly comprises: bearing block, roller shaft, roller, needle bearing, self-aligning bearing, thrust force aligning bearing, end cap, thrust bearing, eccentric bushing, worm gear, worm screw and encoder.Wherein: bearing block is movably connected on cross slide way by bolt, the roller that axis is level is provided with in this bearing block, the roller shaft and the roller that are located at this roller central through hole connect firmly, the eccentric bushing covered the roller shaft of roller both sides is equipped with respectively, the interior center of circular hole of this eccentric bushing does not overlap with cylindrical center, there is an eccentric amount e, bearing assembly is provided with between this eccentric bushing and roller shaft, itself or: be respectively equipped with self-aligning bearing between (i.e. major diameter side) inside the roller shaft adjacent with roller both sides and eccentric bushing, the cooperation of its outer shroud is arranged in the interior circular hole of eccentric bushing, between roller shaft two ends and eccentric bushing, thrust force aligning bearing is housed simultaneously, be used for bearing axial force, the outer shroud sphere centre of thrust force aligning bearing and the center superposition of self-aligning bearing, namely thrust force aligning bearing and self-aligning bearing have identical rotation and adjust center, itself or: respectively self-aligning bearing is housed between inside the roller shaft adjacent with roller both sides and eccentric bushing, respectively taper roll bearing is housed between roller shaft and self-aligning bearing, self-aligning bearing is slip self-aligning bearing, there is larger aligning scope, between roller shaft two ends and eccentric bushing, do not establish thrust force aligning bearing.Be separately installed with needle bearing between outer peripheral face and bearing block circular hole inside above-mentioned eccentric bushing, the outer peripheral face outside eccentric bushing is fixedly connected with worm gear, the axis of worm gear and the cylindrical dead in line of eccentric bushing, above-mentioned worm gear and the worm screw be located in bearing block engage each other.Between eccentric bushing and end cap, thrust bearing is housed, the axis of this thrust bearing and the cylindrical dead in line of eccentric bushing.End cap is bolted on bearing block, leaves minim gap when assembling between end cap and thrust bearing, with small the moving axially of roller shaft generation in compensatory control axial float mechanical adjusting mechanism adjustment process.At the input of worm screw, encoder is housed, is used for measuring the amount of spin of worm screw, the regulated quantity of indirect inspection eccentric bushing.Worm screw in above-mentioned bearing block can manual drive also can be driven by motor.When controlling axial float mechanical adjusting mechanism and being applied to active roller assembly, sliding cross coupling is set up between roller shaft and the output shaft of decelerator, sliding cross coupling can compensate because roller regulates relative displacement between the diaxon axis caused and relative deflection, and control axial float mechanical adjusting mechanism is integrated in bearing block, the transmission of pair roller assembly is without impact.
The course of work of said structure: worm screw, under external force drives, drives worm gear and eccentric bushing to rotate, the pose being arranged on the relative bearing block of axis (i.e. roller axis) of the roller shaft in eccentric bushing will change.When the eccentric bushing synchronous axial system of roller shaft both sides, the circular motion that axis does centered by eccentric bushing cylindrical axis, eccentric amount e is radius of roller, roller can forward and backward, upper and lower translational motion, the displacement space of roller axis is a face of cylinder, the tubular axis be placed on turning rolls can be made to offset, change the angle between tubular axis and roller axis, control cylindrical shell axial float; When the eccentric bushing asynchronous rotary of roller shaft both sides, can spatial deflection be there is in roller own axes, namely be eccentric amount e for bottom surface radius, it is highly the cylinder of two self-aligning bearing centre distances, the axis of roller can coincide with the straight line being connected this cylinder bottom surface circumferentially any point and upper bottom surface circumferentially any point, by the spatial deflection of roller own axes, the angle between tubular axis and roller axis is changed, control cylindrical shell axial float.
Generally the roller axis of four rolling assembly and tubular axis exist angle is unequal, the screw of cylindrical shell is the coefficient result of four rolling, the screw of cylindrical shell and the motion of single roller are unmatched, make to there is an axial force between cylindrical shell and roller.When responsive to axial force is on roller, by roller shaft by load applying to thrust force aligning bearing (or taper roll bearing), and then pass to eccentric bushing, by the thrust bearing on eccentric bushing, load is loaded on bearing block the most at last, thus reaches on base.
The present invention compared with prior art tool has the following advantages:
1, have the regulative mode of various control axial float, namely roller axis can move and spatial deflection implementation space, can change the pose of tubular axis and roller own axes simultaneously, regulate sensitive, controls axial float effective;
2, control axial float mechanical adjusting mechanism simply compact, volume is little, and accessible site is in bearing block, and the transmission of pair roller and roll wheel assembly move and regulate without impact, are applicable to active roller, return idler, applied widely;
3, adopt Worm Wheel System, can form self-locking in frame for movement, be namely automatically locked after having regulated mechanical adjusting mechanism, ensures the accuracy regulated;
4, control axial float mechanical adjusting mechanism regulating power little, can manually, motorized adjustment, zero load can be realized or fully loadedly to adjust;
5, control axial float mechanical adjusting mechanism bearing capacity large, be applicable to loaded contact rollers frame.
Accompanying drawing explanation
Fig. 1 is the three-dimensional simplified schematic diagram of the present invention.
Fig. 2 is that first embodiment of the invention roll wheel assembly master looks generalized section.
Fig. 3 is the A-A view of Fig. 2.
Fig. 4 is that second embodiment of the invention roll wheel assembly master looks generalized section.
Fig. 5 is the B-B view of Fig. 4.
Fig. 6 is that third embodiment of the invention roll wheel assembly master looks generalized section.
Tu7Shi PEMA company turning rolls controls axial float mechanical adjusting mechanism schematic diagram.
Tu8Shi ANSALDO company turning rolls controls axial float mechanical adjusting mechanism schematic diagram.
Fig. 9 is ball screw jacking type automatic anti-flee wheel shelf mechanical adjusting mechanism schematic diagram.
In figure: 1. longitudinal rail, 2. cross slide way, 3. bearing block, 4. roller shaft, 5. roller, 6,6 '. needle bearing, 7,7 ', 15,15 '. self-aligning bearing, 8,8 '. thrust force aligning bearing, 9,9 '. end cap, 10,10 '. thrust bearing, 11,11 '. eccentric bushing, 12,12 '. worm gear, 13,13 '. worm screw, 14,14 '. encoder, 16,16 '. taper roll bearing, 17. motors, 18. decelerators, 19. sliding cross couplings, 20. hydraulic cylinders, 21. ball screws.
Detailed description of the invention
Embodiment 1
The axial float shown in Fig. 1 controlled cylindrical shell flaw detection and turning rolls three-dimensional simplified schematic diagram in, the present invention mainly comprises equipment guiderail base and four removable roll wheel assemblies.Described equipment guiderail base comprises two longitudinal rails, 1, two cross slide waies, 2, two longitudinal rails 1 and is fixed on ground, is located in the same horizontal plane, arranged parallel to each other; Two cross slide waies 2 are arranged on two longitudinal rails 1, and one is fixing cross slide way, and another is can the cross slide way of longitudinally guide rail 1 movement.Each cross slide way 2 is provided with two roll wheel assemblies of cross slide way lengthwise centers line symmetry, each roll wheel assembly is provided with and controls axial float mechanical adjusting mechanism.
In the first embodiment of the invention roll wheel assembly cross-sectional schematic shown in Fig. 2 and Fig. 3, it is the roll wheel assembly of cylindrical shell flaw detection and the turning rolls adopting the axial float of manual adjusting style controlled, this roll wheel assembly mainly comprises: bearing block 3, roller shaft 4, roller 5, needle bearing 6,6 ', self-aligning bearing 7,7 ', thrust force aligning bearing 8,8 ', end cap 9,9 ', thrust bearing 10,10 ', eccentric bushing 11,11 ', worm gear 12,12 ', worm screw 13,13 ' and encoder 14,14 '.Wherein: bearing block 3 is movably connected on cross slide way 2 by bolt, the roller 5 that axis is level is provided with in this bearing block 3, the roller shaft 4 being located at this roller central through hole connects firmly with roller 5, the eccentric bushing 11 covered the roller shaft 4 of roller 5 both sides is equipped with respectively, 11 ', this eccentric bushing 11, bearing assembly is provided with between 11 ' and roller shaft 4, namely adjacent with roller 5 both sides roller shaft 4 and eccentric bushing 11, 11 ' inner side is respectively equipped with self-aligning bearing 7 between (i.e. major diameter side), 7 ', this self-aligning bearing 7, 7 ' outer shroud cooperation is arranged on eccentric bushing 11, in the interior circular hole of 11 ', this eccentric bushing 11, the interior center of circular hole of 11 ' does not overlap with cylindrical center, there is an eccentric amount e, roller shaft 4 two ends and eccentric bushing 11 simultaneously, between 11 ', thrust force aligning bearing 8 is housed respectively, 8 '.The outer shroud sphere centre of thrust force aligning bearing 8,8 ' and the center superposition of self-aligning bearing 7,7 ', i.e. thrust force aligning bearing 8,8 ' has identical rotation with rolling self-aligning bearing 7,7 ' adjusts center.Above-mentioned eccentric bushing 11, needle bearing 6 is separately installed with, 6 ', eccentric bushing 11 between 11 ' inner side outer peripheral face and bearing block 3 circular hole, the outer peripheral face in 11 ' outside is fixedly connected with worm gear 12,12 ', worm gear 12, the axis of 12 ' and eccentric bushing 11, the cylindrical dead in line of 11 ', above-mentioned worm gear 12,12 ' and worm screw 13, the 13 ' engaged transmission be located in bearing block 3.Eccentric bushing 11,11 ' with end cap 9, thrust bearing 10 is housed, 10 ' between 9 ', the axis of this thrust bearing 10,10 ' and the cylindrical dead in line of eccentric bushing 11,11 '.End cap 9,9 ' is movably connected on bearing block 3 by bolt, end cap 9,9 ' with thrust bearing 10, minim gap is left, with small the moving axially, worm screw 13 of roller shaft generation in compensatory control axial float mechanical adjusting mechanism adjustment process when assembling between 10 ', the input of 13 ' is equipped with encoder 14,14 '.
Embodiment 2
In the roll wheel assembly cross-sectional schematic of the second embodiment of the invention shown in Fig. 4 and Fig. 5, it is the roll wheel assembly of cylindrical shell flaw detection and the turning rolls adopting the axial float of motor adjustment mode controlled, its structure is basic identical with manual roll wheel assembly structure, its difference: the roller shaft 4 adjacent with roller 5 both sides and eccentric bushing 11, between 11 ' inner side, self-aligning bearing 15 is housed respectively, 15 ', roller shaft 4 and self-aligning bearing 15, between 15 ', taper roll bearing 16 is housed respectively, 16 ', self-aligning bearing 15, 15 ' is slip self-aligning bearing, be different from the rolling self-aligning bearing 7 in embodiment 1, 7 ', there is larger aligning scope, and the roller shaft 4 outside self-aligning bearing and eccentric bushing 11, thrust force aligning bearing is not established between 11 '.Worm screw 13,13 ' is connected with motor 17,17 ' main shaft, and encoder 14,14 ' is located at motor 17, on the main shaft of 17 '.
Embodiment 3
In the roll wheel assembly cross-sectional schematic of the third embodiment of the invention shown in Fig. 6, it is the active roller assembly of cylindrical shell flaw detection and the turning rolls adopting the axial float of motor adjustment mode controlled, its structure is substantially same as Example 2, just between roller shaft 4 and the output shaft of decelerator 18, set up sliding cross coupling 19, when adjustment motor 17, 17 ' drives worm screw 13, 13 ' rotates, make axis generation space displacement and the spatial deflection of roller shaft 4, after the displacement of sliding cross coupling 19 and angle compensation, the moment of torsion normal delivery of decelerator 18 output shaft can be made to roller shaft 4, drive roller normal rotation.
Above-described embodiment essence is all identical, all rotated by the eccentric bushing of roller shaft both sides to change roller axis pose, difference is to offset in axial force structure, embodiment 1 passes through thrust force aligning bearing by axial force transmission to eccentric bushing, embodiment 2 by taper roll bearing by axial force transmission to slip self-aligning bearing, and then pass to eccentric bushing.In addition embodiment 1 adopts rolling self-aligning bearing, and embodiment 2 adopts slip self-aligning bearing, and two type self-aligning bearings in two embodiments can exchange.Two kinds control axial float mechanical adjusting mechanism, and all available manual actuation or motor drive.

Claims (6)

1. the cylindrical shell flaw detection that an axial float is controlled and turning rolls, it is characterized in that: two parallel longitudinal rails are fixed on ground, be located in the same horizontal plane, two cross slide waies are arranged on two longitudinal rails, one is fixing cross slide way, another is for can the cross slide way of longitudinally guide rail movement, each cross slide way is provided with two roll wheel assemblies of cross slide way lengthwise centers line symmetry, the bearing block of roll wheel assembly is bolted on cross slide way, the roller that axis is level is provided with in this bearing block, the roller shaft and the roller that are located at roller central through hole connect firmly, the eccentric bushing covered the roller shaft of roller both sides is equipped with respectively, the interior center of circular hole of this eccentric bushing does not overlap with cylindrical center, there is an eccentric amount e, bearing assembly is provided with between eccentric bushing and roller shaft, needle bearing is separately installed with between outer peripheral face and bearing block circular hole inside eccentric bushing, outer peripheral face outside eccentric bushing is fixedly connected with worm gear, worm gear and the worm screw be arranged in bearing block engage each other, the axis of worm gear and the cylindrical dead in line of eccentric bushing, between eccentric bushing and end cap, thrust bearing is housed, the axis of this thrust bearing and the cylindrical dead in line of eccentric bushing, end cap is bolted on bearing block.
2. the cylindrical shell flaw detection that axial float according to claim 1 is controlled and turning rolls, it is characterized in that: between the roller shaft adjacent with roller both sides and eccentric bushing, be respectively equipped with self-aligning bearing, the cooperation of its outer shroud is arranged in the interior circular hole of eccentric bushing, between roller shaft two ends and eccentric bushing, thrust force aligning bearing is housed simultaneously, the outer shroud sphere centre of thrust force aligning bearing and the center superposition of self-aligning bearing, namely thrust force aligning bearing and self-aligning bearing have identical rotation and adjust center.
3. the cylindrical shell flaw detection that axial float according to claim 1 is controlled and turning rolls, it is characterized in that: respectively self-aligning bearing is housed between inside the roller shaft adjacent with roller both sides and eccentric bushing, between roller shaft and self-aligning bearing, respectively taper roll bearing is housed.
4. the cylindrical shell flaw detection that axial float according to claim 3 is controlled and turning rolls, is characterized in that: self-aligning bearing is slip self-aligning bearing.
5. the cylindrical shell flaw detection that axial float according to claim 1 is controlled and turning rolls, is characterized in that: at the input of worm screw, encoder is housed.
6. the cylindrical shell flaw detection that axial float according to claim 1 is controlled and turning rolls, it is characterized in that: two roll wheel assemblies one of them be active roller assembly, in active roller assembly, set up sliding cross coupling between roller shaft and the output shaft of decelerator.
CN201410841098.3A 2014-12-30 2014-12-30 The cylindrical shell flaw detection that a kind of axial float is controlled and turning rolls Expired - Fee Related CN104668875B (en)

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CN105689470A (en) * 2016-03-11 2016-06-22 山西大同大学 Pre-bending device which is matched with symmetrical three-roll plate bending machine for use

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CN203484857U (en) * 2013-08-19 2014-03-19 镇江威孚锅炉有限公司 Moving prevention roller carrier
CN104057240A (en) * 2013-03-22 2014-09-24 上海欧朋软件有限公司 Anti-drifting welding roller bed

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Publication number Priority date Publication date Assignee Title
SU1555093A1 (en) * 1988-06-06 1990-04-07 Научно-Производственное Объединение По Выпуску Механического Сварочного Оборудования Apparatus for welding
CN102009317A (en) * 2010-05-31 2011-04-13 无锡恒富科技有限公司 Moving-prevention structure of welding roller frame
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CN104057240A (en) * 2013-03-22 2014-09-24 上海欧朋软件有限公司 Anti-drifting welding roller bed
CN203484857U (en) * 2013-08-19 2014-03-19 镇江威孚锅炉有限公司 Moving prevention roller carrier
CN103567690A (en) * 2013-11-14 2014-02-12 南京奥特电气股份有限公司 Assembly tool for accurately locating large-size storage tank

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