CN105598214A - Straight roller type pipe straightening machine and method - Google Patents
Straight roller type pipe straightening machine and method Download PDFInfo
- Publication number
- CN105598214A CN105598214A CN201510971250.4A CN201510971250A CN105598214A CN 105598214 A CN105598214 A CN 105598214A CN 201510971250 A CN201510971250 A CN 201510971250A CN 105598214 A CN105598214 A CN 105598214A
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- Prior art keywords
- roll
- straightening
- upper straightening
- straight
- pipe
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
- B21D3/02—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts by rollers
Abstract
The invention provides a straight roller type pipe straightening machine and method. The straight roller type pipe straightening machine comprises a frame body mechanism, a lifting mechanism and a rotary straightening roller mechanism. The rotary straightening roller mechanism comprises an upper straightening roller and two lower straightening rollers. The upper straightening roller is connected with the lifting portion. The two lower straightening rollers are supported on a lower beam. The upper straightening roller is located above the two lower straightening rollers in a centered mode. The axis of the upper straightening roller is parallel to the axes of the two lower straightening rollers. The upper straightening roller can be driven by the lifting portion to ascend and descend in the vertical direction. The upper straightening roller and the two lower straightening rollers are driven by a motor to rotate. When a tubular billet is conveyed to the two lower straightening rollers, the upper straightening roller descends to press the tubular billet, the tubular billet is subjected to plastic deformation till the section of the tubular billet is in an oval shape, the tubular billet is squeezed by the upper straightening roller and the two lower straightening rollers in the tubular billet surface rotating process to have the circular section, and the circle centers of all circular sections are located on the same axis.
Description
Technical field
The present invention relates to a kind of straightener, relate in particular to a kind of straight roll-type tube straightener for pipe and a kind of aligningMethod.
Background technology
Tradition roll-type tube straightener for pipe is by hyperbolic surface skew roller type to be aligned, and is rectified pipe according to differentThe diameter of material, smoothing roll need to be adjusted opening degree, angle and flexibility.
As depicted in figs. 1 and 2, Fig. 1 is wrong roll-type structure Levelling principle figure to existing technology, and Fig. 2 isPair roller type Levelling principle figure. As shown in Figure 1, wrong roll-type structure aligning refers to that adjacent smoothing roll is in staggered distributionIn the periphery of hollow billet. As shown in Figure 2, pair roller type aligning refers to that every pair of smoothing roll is arranged on hollow billet peripheryThe both sides of same extension position, and this to smoothing roll with contrary incline direction setting.
The smoothing roll of above-mentioned cross-roll straightening machine is curve roller, and the surface of smoothing roll has radian, its workBy angled walking the wire of smoothing roll and hollow billet installation as principle, with the recessed face contact of smoothing rollHollow billet, hollow billet can rotate and advance by straightener like this, repeatedly bends real under the effect of smoothing rollNow aligning, makes steel tube forming precision meet the method that product standard requires.
The problem that now technology exists is, curve roller processing difficulties, parameter adjustment complexity; Due to smoothing rollSubsection setup, therefore after aligning there is certain straightening blind area in tubing, and the front and back end of tubing cannot be rectifiedDirectly. And owing to being curve roller, the tube surfaces after aligning has spiral trace, affects straightening quality.Face and to wrong roll straightening, the precision of tubing circularity cannot realize.
Summary of the invention
Based on the problems referred to above, the invention provides a kind of straight roll-type tube straightener for pipe and method for aligning, to carryHigh straightening quality and aligning efficiency.
For reaching above-mentioned purpose, the invention provides a kind of straight roll-type tube straightener for pipe, for aligning hollow billet,Wherein, straight roll-type tube straightener for pipe comprises support body mechanism, elevating mechanism and rotating and straightening roller mechanism. Support bodyMechanism comprises entablature, sill, base and column, and base is positioned on workbench, and sill is fixedOn base, entablature is by parallel being supported on sill of column; Elevating mechanism comprises drive divisionAnd lifting unit, entablature is fixed in one end of lifting unit, and drive division can drive the other end liter of lifting unitFall; Rotating and straightening roller mechanism comprises a upper straightening roll and twice smoothing rolls, and upper straightening roll is connected with lifting unit,Twice smoothing roll is supported on sill, and what upper straightening roll was placed in the middle is positioned on twice smoothing rolls, andUpper straightening roll is parallel with the axis of twice smoothing rolls, and upper straightening roll can be driven vertically by lifting unitLifting, upper straightening roll and twice smoothing rolls drive rotation by motor respectively; Wherein, when hollow billet is transported toAfter twice smoothing rolls, upper straightening roll drops to and is pressed on hollow billet, makes hollow billet generation plastic deformation to hollow billetCross section be oval, upper straightening roll and twice smoothing rolls, in the rotary course of hollow billet surface, make hollow billetBe squeezed into cross section for circular by upper straightening roll and twice smoothing rolls, and the center of circle of each circular cross-section is sameOn axis.
The present invention also provides a kind of method for aligning that utilizes above-mentioned straight roll-type tube straightener for pipe, it comprise withLower step:
Make lifting unit drive upper straightening roll to rise;
Hollow billet is transported on twice smoothing rolls;
Make lifting unit drive upper straightening roll to drop to and be pressed on hollow billet, make hollow billet generation plastic deformation to hairThe cross section of pipe is oval;
Motor drives respectively upper straightening roll and the rotation of twice smoothing rolls, the upper straightening roll that hollow billet is rotated andThe extruding of twice smoothing rolls makes the cross section of hollow billet circular, and the center of circle of each circular cross-section is at same axleOn line.
The present invention is compared to the beneficial effect of prior art: the present invention compared with traditional cross-roll straightening machine,By straight roll straightening mechanism aligning hollow billet, aligning efficiency is high, and pipe outer surface quality is good, without spiral trace,And can realize the aligning within the scope of tubing overall length, eliminated straightening blind area, after smoothing roll wearing and tearing to aligningQuality influence is little. Especially non-ferrous metal or the large tubing of radius-thickness ratio etc. are aligned by skew roller type straightenerThe situation of poor effect, can greatly improve straightening quality by straight roll leveller.
Brief description of the drawings
Fig. 1 a and Fig. 1 b are the schematic diagram of existing wrong roll-type tube straightener for pipe.
Fig. 2 a and Fig. 2 b are the schematic diagram of existing pair roller type tube straightener for pipe.
Fig. 3 is the front view of straight roll-type tube straightener for pipe of the present invention.
Fig. 4 is the side view of straight roll-type tube straightener for pipe of the present invention.
Fig. 5 is by the schematic diagram of the hollow billet before straight roll-type tube straightener for pipe aligning of the present invention.
Fig. 6 is the cutaway view along AA line in Fig. 5.
Fig. 7 is by the schematic diagram of the hollow billet after straight roll-type tube straightener for pipe aligning of the present invention.
Fig. 8 is the cutaway view along BB line in Fig. 7.
Detailed description of the invention
Referring now to accompanying drawing, example embodiment is more fully described. But example embodiment canImplement in a variety of forms, and should not be understood to be limited to embodiment set forth herein; On the contrary, provide thisA little embodiments make the present invention more comprehensively with complete, and the design of example embodiment is passed on all sidedlyGive those skilled in the art. In the drawings, for clear, may exaggerate the thickness of region and layer. ?In figure, identical Reference numeral represents same or similar structure, thereby will omit their detailed description.
In addition, described feature, structure or characteristic can be combined in any suitable manner one orIn more embodiment. In the following description, thus provide many details to provide reality of the present inventionExecute fully understanding of example. But, one of skill in the art will appreciate that and can put into practice technology of the present inventionScheme and there is no one or more in described specific detail, or can adopt other method, constituent element,Material etc. In other cases, be not shown specifically or describe known features, material or operation to avoidFuzzy major technique intention of the present invention.
With reference to shown in Fig. 3 to Fig. 4, one embodiment of the invention provide a kind of straight roll-type tube straightener for pipe,Be used for aligning hollow billet, wherein, straight roll-type tube straightener for pipe comprise support body mechanism 10, elevating mechanism 20 andRotating and straightening roller mechanism 30.
Support body mechanism 10 comprises entablature 11, sill 12, base 13 and column 14,13 of basesOn workbench, sill 12 is fixed on base 13, and entablature 11 is parallel by column 14Be supported on sill 12. In the present embodiment, the quantity of column 14 is four, but is not limited to this.
Elevating mechanism 20 comprises drive division 21 and lifting unit 22, and top rail is fixed in one end of lifting unit 22Beam 11, drive division 21 can drive the other end lifting of lifting unit 22. In the present embodiment, lifting unit 22One end be fixed on the lower surface of entablature 11, its can away from or move near entablature 11.
Rotating and straightening roller mechanism 30 comprises a upper straightening roll 31 and twice smoothing rolls 32, upper straightening roll 31Be connected with lifting unit 22, twice smoothing roll 32 is supported on sill 12, and upper straightening roll 31 occupiesIn be positioned on twice smoothing rolls 32, and upper straightening roll 31 is parallel with the axis of twice smoothing rolls 32,Upper straightening roll 31 can be driven vertically lifting by lifting unit 22, upper straightening roll 31 and twice aligningsRoller 32 drives rotation by motor (not shown) respectively.
Wherein, when hollow billet 100 is transported to after twice smoothing rolls 32, upper straightening roll 31 drops to and is pressed inOn hollow billet 100, making hollow billet 100 that plastic deformation occur is ellipse to the cross section of hollow billet 100, upper rectifyingStraight roller 31 and twice smoothing rolls 32, in the surperficial rotary course of hollow billet 100, make hollow billet 100 be rectified by upperStraight roller 31 and twice smoothing rolls 32 are squeezed into cross section for circular, and the center of circle of each circular cross-section is sameOn axis, hollow billet 100 becomes straight tube.
Fig. 5 to Fig. 8 has explained and has utilized the principle of flattening aligning effect aligning hollow billet. As Fig. 5 and Fig. 6 instituteShow, bending hollow billet 100 is clamped between upper straightening roll 31 and twice smoothing rolls 32, and is extrudedIt is oval becoming cross section. Along with the rotation of upper straightening roll 31 and twice smoothing rolls 32, oval-shaped major axisTo be crushed, the tube wall of short-axis direction is bent to both sides evagination, straightens, as Fig. 7 and Fig. 8 institute simultaneouslyShow.
The present invention is compared with traditional cross-roll straightening machine, by straight roll straightening mechanism aligning hollow billet, aligning effectRate is high, and pipe outer surface quality is good, without spiral trace, and can realize the aligning within the scope of tubing overall length,Eliminate straightening blind area, little on straightening quality impact after smoothing roll wearing and tearing. Especially to non-ferrous metal or footpathThe tubing that thickness rate is large etc. are by the not good situation of skew roller type straightener leveling effect, by straight roll levellerCan greatly improve straightening quality.
In the present embodiment, upper straightening roll 31 and twice smoothing rolls 32 are all with identical rotating speed rotating Vortex,Upper straightening roll 31 and twice smoothing rolls 32 are cylindrical and smooth surface.
As shown in Figure 3,4, in the present embodiment, support body mechanism 10 also comprises hoisting cross beam 15, and it is parallelBetween entablature 11 and sill 12, be preferably hoisting cross beam 15, entablature 11 and bottom railBeam 12 has identical length and width. Column 14 passes hoisting cross beam 15, hoisting cross beam 15 and literThe other end that falls portion 22 is fixedly connected with, and the two ends of hoisting cross beam 15 are respectively provided with a bearing 16, each bearing16 are connected with one end of upper straightening roll 31, when drive division 21 drives the other end lifting of lifting unit 22,Hoisting cross beam 15 and upper straightening roll 31 lifting thereupon.
Wherein, be longitudinally evenly provided with multiple lifting units 22, the present embodiment along straight roll-type tube straightener for pipeIn be provided with three, between adjacent lifting unit 22, can connect by shaft coupling 23. Another of each lifting unit 22End is fixedly connected with the upper surface of hoisting cross beam 15. Therefore, drive division 21 can drive multiple lifting units22 synchronization liftings draw hoisting cross beam 15 with multiple lifting units 22 simultaneously, thereby realize upper straightening roll 31Lifting stably, and ensure its levelness.
As shown in Figure 3, in the present embodiment, rotating and straightening roller mechanism 30 also comprises upper backup roll 33, itsThe rotatable lower surface that is installed on hoisting cross beam 15, upper backup roll 33 connects with the surface of upper straightening roll 31Touch, in the time that upper straightening roll 31 rotates, upper backup roll 33 rotates thereupon. Under rotating and straightening roller mechanism also comprisesBacking roll 34, its rotatable upper surface that is installed on sill 12, lower backing roll 34 and twice aligningsThe Surface Contact of roller 32, when smoothing roll 32 rotates instantly, lower backing roll 34 rotates thereupon. By upper supportRoller 33 and lower backing roll 34 support respectively upper straightening roll 31 and twice smoothing rolls 32, can improve smoothing rollFastness, particularly for the larger smoothing roll of length, can prevent that flexural deformation from appearring in its middle part, byThis improves straightening quality. Preferably, along multiple upper the propping up of being longitudinally evenly provided with of straight roll-type tube straightener for pipeSupport roller 33 and lower backing roll 34, and upper backup roll 33 and lower backing roll 34 position correspondences.
As shown in Figure 4, in the present embodiment, rotating and straightening roller mechanism 30 also comprises multiple along straight roll-type pipeMaterial straightener longitudinally evenly and the lifting transport roller 35 of the setting of alignment, lifting transport roller 35 comprisesSupport seat 351 and transport roller 352, the liftable sill 12 that is installed on of supporting seat 351, transport roller 352Rotatablely be connected with supporting seat 351, and the rotating shaft of transport roller 352 is vertical with the axis of lower smoothing roll 33.The surface design of transport roller 352 becomes middle recessed curved surface, for example, select V-arrangement roller, so that laminating moreSupport hollow billet 100. After aligning completes, upper straightening roll 31 rises, and lifting transport roller 35 rises,Hollow billet 100 is held up, make hollow billet 100 leave upper backup roll 33 and lower backing roll 34, by transporterStructure (not shown) drives the hollow billet 100 of being aligned on transport roller 352, to slide into next station.
The present invention also provides a kind of method for aligning that utilizes above-mentioned straight roll-type tube straightener for pipe, with reference to Fig. 3To Fig. 4, it comprises the following steps:
Make lifting unit 22 drive upper straightening roll 31 to rise;
Hollow billet 100 is transported on twice smoothing rolls 32;
Make lifting unit 22 drive upper straightening roll 31 to drop to and be pressed on hollow billet 100, make 100 of hollow billetsRaw plastic deformation to the cross section of hollow billet 100 is oval;
Motor drives respectively upper straightening roll 31 and twice smoothing rolls 32 to rotate, and hollow billet 100 is rotatedThe extruding of upper straightening roll 31 and twice smoothing rolls 32 makes the cross section of hollow billet 100 circular, and each circleThe center of circle of tee section is on same axis, and hollow billet 100 becomes straight tube.
In the present embodiment, rotating and straightening roller mechanism also can comprise encoder and displacement transducer, by encoderRecord the displacement in process that presses down of upper straightening roll 31, when displacement transducer senses upper straightening roll 31When mobile preset distance, send upper straightening roll 31 stop signals. Can phase be set according to the hollow billet of different sizeThe preset distance of answering, therefore can strictly monitor the lifting displacement of upper straightening roll 31, further improves aligningQuality.
In sum, the present invention is compared with traditional cross-roll straightening machine, by straight roll straightening mechanism aligning hairPipe, aligning efficiency is high, and pipe outer surface quality is good, without spiral trace, and can realize tubing overall length scopeInterior aligning, has eliminated straightening blind area, little on straightening quality impact after smoothing roll wearing and tearing. Especially to havingThe tubing that non-ferrous metal or radius-thickness ratio are large etc. are by the not good situation of skew roller type straightener leveling effect, by directlyRoll leveller can greatly improve straightening quality.
Although described the present invention with reference to several exemplary embodiments, should be appreciated that term used isIllustrate and exemplary and nonrestrictive term. Because the present invention can specifically implement in a variety of formsDo not depart from spirit or the essence of invention, so it is any aforesaid thin to should be appreciated that above-described embodiment is not limited toJoint, and explain widely in the spirit and scope that should limit in the claim of enclosing, therefore fall into rightWhole variations in requirement or its equivalent scope and remodeling all should be the claim of enclosing and contain.
Claims (10)
1. a straight roll-type tube straightener for pipe, for aligning hollow billet, wherein, straight roll-type tube straightener for pipe bagDraw together:
Support body mechanism, comprises entablature, sill, base and column, and base is positioned on workbench,Sill is fixed on base, and entablature is by parallel being supported on sill of column;
Elevating mechanism, comprises drive division and lifting unit, and entablature is fixed in one end of lifting unit, drive divisionCan drive the other end lifting of lifting unit; And
Rotating and straightening roller mechanism, comprises a upper straightening roll and twice smoothing rolls, and upper straightening roll and lifting unit connectConnect, twice smoothing roll is supported on sill, and what upper straightening roll was placed in the middle is positioned on twice smoothing rolls,And upper straightening roll is parallel with the axis of twice smoothing rolls, upper straightening roll can be driven along vertically square by lifting unitTo lifting, upper straightening roll and twice smoothing rolls drive rotation by motor respectively;
Wherein, when hollow billet is transported to after twice smoothing rolls, upper straightening roll drops to and is pressed on hollow billet, makesIt is oval obtaining hollow billet generation plastic deformation to the cross section of hollow billet, and upper straightening roll and twice smoothing rolls are at hollow billetIn the rotary course of surface, make hollow billet be squeezed into cross section for circular by upper straightening roll and twice smoothing rolls, andThe center of circle of each circular cross-section is on same axis.
2. straight roll-type tube straightener for pipe as claimed in claim 1, wherein, upper straightening roll and twice aligningsRoller is all with identical rotating speed rotating Vortex, and upper straightening roll and twice smoothing rolls are cylindrical and smooth surface.
3. straight roll-type tube straightener for pipe as claimed in claim 2, wherein, support body mechanism also comprises liftingCrossbeam, it is parallel between entablature and sill, column is through hoisting cross beam, hoisting cross beam withThe other end of lifting unit is fixedly connected with, and the two ends of hoisting cross beam are respectively provided with a bearing, each bearing and upper rectifyingOne end of straight roller connects, when drive division drives the other end lifting of lifting unit, and hoisting cross beam and upper straightening rollLifting thereupon.
4. straight roll-type tube straightener for pipe as claimed in claim 3, wherein, rotating and straightening roller mechanism also wrapsDraw together upper backup roll, its rotatable lower surface that is installed on hoisting cross beam, upper backup roll and upper straightening rollSurface Contact drives upper backup roll rotation in the time that upper straightening roll rotates.
5. straight roll-type tube straightener for pipe as claimed in claim 4, wherein, rotating and straightening roller mechanism also wrapsDraw together lower backing roll, its rotatable upper surface that is installed on sill, lower backing roll and twice smoothing rollsSurface Contact, drives lower backing roll rotation when smoothing roll rotation instantly.
6. straight roll-type tube straightener for pipe as claimed in claim 5, wherein, along straight roll-type tube straighteningMachine be longitudinally evenly provided with multiple upper backup rolls and lower backing roll and upper backup roll and lower backing roll position pairShould.
7. straight roll-type tube straightener for pipe as claimed in claim 1, wherein, along straight roll-type tube straighteningMachine be longitudinally evenly provided with multiple lifting units, and connect by shaft coupling between adjacent lifting unit.
8. straight roll-type tube straightener for pipe as claimed in claim 1, wherein, rotating and straightening roller mechanism also wrapsDraw together the lifting transport roller of the setting of multiple evenly longitudinal and alignment along straight roll-type tube straightener for pipe, liftingTransport roller comprises supporting seat and transport roller, the liftable sill that is installed on of supporting seat, and transport roller is rotatableBe connected with supporting seat, and the rotating shaft of transport roller is vertical with the axis of lower smoothing roll.
9. straight roll-type tube straightener for pipe as claimed in claim 1, wherein, rotating and straightening roller mechanism also wrapsDraw together encoder and displacement transducer, recorded the displacement in process that presses down of upper straightening roll by encoder, whenWhen displacement transducer senses upper straightening roll and moves preset distance, send upper straightening roll stop signal.
10. one kind is utilized the aligning of the straight roll-type tube straightener for pipe described in any one in claim 1 to 9Method, it comprises the following steps:
Make lifting unit drive upper straightening roll to rise;
Hollow billet is transported on twice smoothing rolls;
Make lifting unit drive upper straightening roll to drop to and be pressed on hollow billet, make hollow billet generation plastic deformation to hairThe cross section of pipe is oval;
Motor drives respectively upper straightening roll and the rotation of twice smoothing rolls, the upper straightening roll that hollow billet is rotated andThe extruding of twice smoothing rolls makes the cross section of hollow billet circular, and the center of circle of each circular cross-section is at same axleOn line.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510971250.4A CN105598214B (en) | 2015-12-21 | 2015-12-21 | A kind of straight roll-type tube straightener for pipe and method for aligning |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510971250.4A CN105598214B (en) | 2015-12-21 | 2015-12-21 | A kind of straight roll-type tube straightener for pipe and method for aligning |
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| CN105598214A true CN105598214A (en) | 2016-05-25 |
| CN105598214B CN105598214B (en) | 2017-12-15 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106424218A (en) * | 2016-11-17 | 2017-02-22 | 燕山大学 | Pipe roller type continuous rounding equipment and machining method |
| CN106623506A (en) * | 2016-11-17 | 2017-05-10 | 燕山大学 | Roller-type integral round setting technique for pipe |
| CN106623507A (en) * | 2016-11-17 | 2017-05-10 | 燕山大学 | Roller type continuous tube shaping equipment and processing method |
| WO2018006512A1 (en) * | 2016-07-07 | 2018-01-11 | 南通超力卷板机制造有限公司 | Numerical control roundness adjustment machine employing multiple shafts to perform outer circumference reduction and reciprocating bending |
| CN109226364A (en) * | 2018-10-15 | 2019-01-18 | 珠海市格努科技有限公司 | A kind of outer circle roller arrangement |
| CN109623523A (en) * | 2018-12-17 | 2019-04-16 | 安徽宝泰特种材料有限公司 | A kind of online arrangement for grinding of tube straightener for pipe straightening roll |
| CN110355239A (en) * | 2019-07-25 | 2019-10-22 | 温州鹏象管件有限公司 | A kind of accurate levelling means for stainless steel pipe processing |
| CN110479798A (en) * | 2019-08-15 | 2019-11-22 | 大连市旅顺顺兴建筑机械厂 | Spiral form straightening mechanism |
| CN112222233A (en) * | 2020-10-01 | 2021-01-15 | 崔通来 | Stainless steel section bar straightening machine |
| CN113894170A (en) * | 2021-10-13 | 2022-01-07 | 北京科技大学 | Double-roller driving extrusion forming device and process for hollow screw rod |
| CN113976674A (en) * | 2021-10-26 | 2022-01-28 | 沈阳康特机电设备有限公司 | Sizing and straightening device for longitudinal welded pipe |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2018006512A1 (en) * | 2016-07-07 | 2018-01-11 | 南通超力卷板机制造有限公司 | Numerical control roundness adjustment machine employing multiple shafts to perform outer circumference reduction and reciprocating bending |
| CN106424218A (en) * | 2016-11-17 | 2017-02-22 | 燕山大学 | Pipe roller type continuous rounding equipment and machining method |
| CN106623506A (en) * | 2016-11-17 | 2017-05-10 | 燕山大学 | Roller-type integral round setting technique for pipe |
| CN106623507A (en) * | 2016-11-17 | 2017-05-10 | 燕山大学 | Roller type continuous tube shaping equipment and processing method |
| CN109226364A (en) * | 2018-10-15 | 2019-01-18 | 珠海市格努科技有限公司 | A kind of outer circle roller arrangement |
| CN109623523A (en) * | 2018-12-17 | 2019-04-16 | 安徽宝泰特种材料有限公司 | A kind of online arrangement for grinding of tube straightener for pipe straightening roll |
| CN109623523B (en) * | 2018-12-17 | 2020-11-10 | 安徽宝泰特种材料有限公司 | Online grinding device for straightening roller of pipe straightening machine |
| CN110355239A (en) * | 2019-07-25 | 2019-10-22 | 温州鹏象管件有限公司 | A kind of accurate levelling means for stainless steel pipe processing |
| CN110479798A (en) * | 2019-08-15 | 2019-11-22 | 大连市旅顺顺兴建筑机械厂 | Spiral form straightening mechanism |
| CN112222233A (en) * | 2020-10-01 | 2021-01-15 | 崔通来 | Stainless steel section bar straightening machine |
| CN113894170A (en) * | 2021-10-13 | 2022-01-07 | 北京科技大学 | Double-roller driving extrusion forming device and process for hollow screw rod |
| CN113976674A (en) * | 2021-10-26 | 2022-01-28 | 沈阳康特机电设备有限公司 | Sizing and straightening device for longitudinal welded pipe |
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| CN105598214B (en) | 2017-12-15 |
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