CN104475496A - Straightening method and device for thick shaft like parts - Google Patents
Straightening method and device for thick shaft like parts Download PDFInfo
- Publication number
- CN104475496A CN104475496A CN201410642826.8A CN201410642826A CN104475496A CN 104475496 A CN104475496 A CN 104475496A CN 201410642826 A CN201410642826 A CN 201410642826A CN 104475496 A CN104475496 A CN 104475496A
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- Prior art keywords
- straightening
- axle
- cylinder
- dop
- annular cylinder
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Classifications
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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
- B21D3/10—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 between rams and anvils or abutments
-
- 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
- B21D3/16—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 of specific articles made from metal rods, tubes, or profiles, e.g. crankshafts, by specially adapted methods or means
Abstract
The invention provides straightening method and device for thick shaft like parts. The method is mainly applied to the straightening of the thick shaft like part; a clamping head is used for applying an axial loading force on a straightened shaft; the bent and deformed clamped end is straightened during clamping by the clamping head; under the effect of the axial loading force, a hydraulic cylinder is used for applying a straightening loading force for a sectioning reverse bending straightening die, so as to straighten the bent and deformed shaft body under the effects of the axial loading force and the straightening loading force. According to the method, the tensile reverse bending straightening method and device are adopted, the resilience value after straightening from bending is decreased, the force for reverse bending straightening is lowered down, straightening device bending detecting system and straightening displacement analyzing calculating control system are decreased, and a plurality of bent and deformed shaft bodies can be straightened at a time; the process is simple, and the straightening efficiency is high; the method and device are suitable for cold and hot straightening processes of steps and polish rod thick shafts like parts such as a train shaft and a car transmission shaft.
Description
Technical field
Aligning method and equipment after the present invention relates to the forging of a kind of thick axial workpiece or after heat treatment, especially for hot and cold aligning method and the equipment of the ladder such as train shaft, truck drive shaft and the thick axial workpiece of polished rod.
Background technology
Axle supports other rotational components, the important machine components of transmitting torque.Its accuracy of manufacture directly affects the stationarity of mechanical movement.Axial workpiece all can produce flexural deformation after forging He after heat treatment, and flexural deformation causes following process amount large, waste material.Forging the flexural deformation after rear and heat treatment to reduce axial workpiece, usually increasing straightening technology.Stretching method, extension method and three-point bending method is had according to the straightening technology that material and deformation behaviour are commonly used.Stretching method is usually used in smoothing flat-type part, and extension method is mainly used in the alignment of various section bar, wire rod, and three-point bending is mainly used in the alignment of pipe, rod and axial workpiece.
Usually adopt three-point bending technique to carry out alignment for thick axial workpiece, first measured the bending deformation quantity of axle before alignment by checkout gear, determine fulcrum and ram position, determine pressure head drafts.Whole straightening technology process is complicated, and production efficiency is low, and alignment deformation resilience is large.
The straightening equipment of existing axial workpiece is substantially according to three-point bending technique.Straightening equipment generally includes bending detection device, coalignment, alignment parametric controller and transmission device etc.Alignment precision depends on the accuracy of detection of checkout gear and the control accuracy of alignment control system.
Summary of the invention
Aligning method and the equipment of a kind of thick axial workpiece that a kind of technical process is simple, alignment springback capacity is little, alignment efficiency is high are the object of the present invention is to provide.The present invention mainly adopts tension force straightening method, and designs a kind of tension force straightening equipment based on the method.
The present invention is achieved by the following technical solutions:
Straightening equipment of the present invention mainly comprises frame, clamp system, rotary positioning mechanism, aligning mechanism and hydraulic pressure and control system.Its mid frame mainly comprises base, support, guide rail.Base is fixed on the ground by foundation bolt, and guide rail is laid on the both sides of base upper surface, and two side stands are by guide rails assembling on base, and two side stands are connected with clamp system.Clamp system mainly comprises annular cylinder, dop and movable wedge, is separately fixed on two side stands that are positioned on guide rail.Dop establishes the cylinder of cavity in being, this cylinder is provided with the conical through-hole corresponding with guide rail and the small diameter bore of two dops is mounted opposite, and two dop side faces are provided with axially relative evagination journal stirrup.In the conical cavity of this dop, be provided with that outside is the inclined-plane corresponding with it, inner side have with by movable wedge corresponding to the alignment workpiece end shaft shoulder, this movable wedge is connected with annular cylinder piston outer end by hinge.This movable wedge according to the shape treating alignment axle bare terminal end only diameter difference change, this annular cylinder piston the inner be positioned at annular cylinder without bar cannelure.This cannelure sidewall is positioned at opening and two bottom sides is established respectively into and out of oilhole.This annular cylinder is separately fixed on corresponding dop by flange.Rotary positioning mechanism mainly includes: hydraulic pressure is top, rotating mechanism and spring.Hydraulic pressure is provided with top in the center slotted eye of above-mentioned annular cylinder, the slide block that in the middle part of it, slotted eye cross section, You Yigeyu center is corresponding, slide block end face is vertically fixed a fore-set coaxial with it, the end top of this fore-set is provided with thimble, there is spring in the outer surface cover of this fore-set, center slotted eye opening is provided with spring capping; Another end face of slide block is connected with connecting rod one end, and the other end that this connecting rod is positioned at outside annular cylinder through bottom land central through hole is connected with rotating mechanism, separately also establishes at bottom land center and the oil inlet and outlet passing in and out oil pipe and be connected.Between two dops, be provided with straightening mould mechanism, it mainly includes: straightening mould, connecting rod, hydraulic cylinder A and hydraulic cylinder B.Hydraulic cylinder A is connected with both sides dop evagination journal stirrup respectively, straightening mould is take axis as two distinguish straightening moulds of symmetry, mold cavity is arc surface, its arc surface radius of curvature is equal with the standard radius of alignment axle, this distinguish straightening mould is according to treating that the difference of alignment axle is changed, its respectively by bearing pin and connecting rod one end hinged, the two connecting rod other ends are connected with the two ends of same hydraulic cylinder B, and this hydraulic cylinder B is fixed in frame.Respectively establish a fulcrum in the middle part of above-mentioned two connecting rods, this fulcrum is fixed in frame by journal stirrup.Control transmission system and mainly comprise Hydraulic Power Transmission System and electrical apparatus control system, Hydraulic Power Transmission System mainly contains pumping plant, fuel tank, valve group, pipeline composition, and pumping plant passes in and out oilhole with hydraulic cylinder A, hydraulic cylinder B with annular cylinder by the band valve pipeline be connected with fuel tank and is connected respectively.
Method of the present invention is mainly treated alignment workpiece (axle) and is applied axial load, applies straightening power simultaneously, make the flexural deformation alignment of axle to axle body.
Concrete steps are as follows:
1, primer fluid cylinder pressure A promote dop, annular cylinder, movable wedge and be arranged in that the hydraulic pressure of annular cylinder is top, rotating mechanism and spring etc. along guide rail on base to two lateral movements, until 2, left and right dop spacing is greater than and treats that alignment shaft length stops; To treat that the axle (hereinafter referred to as axle) of alignment is sent between the dop of straightening equipment of the present invention (hereinafter referred to as equipment) left and right, simultaneously by the turnover oilhole at the bottom of annular cylinder central channel to the top slide block fuel feeding of hydraulic pressure, hydraulic pressure top under fluid pressure effect Compress Spring, axle is fixed on two hydraulic pressure top between.
2, hydraulic cylinder A drives dop, annular cylinder, movable wedge to stop along guide rail to move toward one another to desired location, axle two ends are included in the movable wedge in hydraulic clamp, oil is drained by the turnover oilhole at the bottom of annular cylinder central channel, and hydraulic pressure top 9 is return under spring 11 acts on.
3, to annular cylinder without bar cannelure oil-in fuel feeding, annular cylinder then to piston apply power F
1, moved to the inside, so axle is clamped by movable wedge by the inner surface of hinge promotion movable wedge along dop.The flexural deformation of bare terminal end is simultaneously corrected.
4, hydraulic cylinder A is to dop applying axial force F laterally
2, dop under this force, applies axial load F by movable wedge to axle
2, make in alignment axle longitudinal section, to be produced the tension being less than yield stress.
5, axial load F is kept
2, primer fluid cylinder pressure B promotes distinguish straightening mold movement by connecting rod.This straightening mould clamp shaft under the effect of hydraulic cylinder B, applies straightening power F to axle body
3the flexural deformation of axle body is corrected.
6, power F is removed
2, F
3, hydraulic cylinder B drives straightening mould to return by connecting rod, by the turnover oilhole at the bottom of annular cylinder central channel to the top fuel feeding of hydraulic pressure, hydraulic pressure top under fluid pressure effect Compress Spring, axle is fixed on equipment both sides hydraulic pressure top between; There is bar cannelure fuel feed hole fuel feeding to annular cylinder, just drive movable wedge to two lateral movements, unclamp the pinching end of axle; Start rotating mechanism by hydraulic pressure top drive axle half-twist, repeat above-mentioned 1-5 step, can by the flexural deformation alignment in axle in the axial direction each plane face.
The present invention compared with prior art tool has the following advantages:
1, this invention is in thick aligning axis part process, applies axial tensile force by hydraulic clamp in advance to by alignment axle, carries out an alignment under tension by straightening mould to bending axis.In alignment process, apply axial tensile force to by alignment axle, significantly reduce alignment power required in bending alignment process, effectively can reduce the resilience after bending alignment.Adopt straightening mould clamping alignment workpiece, eliminate the determination and analysis control system of three-point bending straightening technology complexity, the alignment of many bending axis can be realized, improve alignment efficiency.
2, tension force straightening method and apparatus of the present invention, without the need to the Displacement Analysis control system of the curved detection system needed for straightening equipment and alignment pressure head, reduces equipment cost; By changing movable wedge and distinguish straightening mould, can realize the straightening technology of many specifications axial workpiece, the compatibility of equipment is good.Realize an alignment of the many cambered axles of axle body, technical process is simple, and alignment efficiency is high.Be suitable for the hot and cold automatic aligning of ladder, the thick axial workpiece of polished rod.
Accompanying drawing explanation
Fig. 1 be processing step axle step 1 of the present invention, 2, the master of 3 looks generalized section.
Fig. 2 is the A-A view of Fig. 1.
Fig. 3 be processing step axle step 4 of the present invention, 5 master look generalized section.
Fig. 4 is the C-C view of Fig. 3.
The master of Fig. 5 processing step axle of the present invention step 6 looks generalized section
Fig. 6 be the present invention process polished rod axle step 1,2, the master of 3 looks generalized section.
Fig. 7 be the present invention process polished rod axle step 4,5 master look generalized section.
In figure: 1 base, 2 guide rails, 3 annular cylinders, 4 movable wedge, 5 dops, 6 hydraulic cylinder A, 7 straightening moulds, 8 treat alignment axle, and 9 hydraulic pressure are top, 10 rotating mechanisms, 11 springs, 12 connecting rods, 13 hydraulic cylinder B, 14 supports, 15 fuel tanks, 16 oil pipes.
Detailed description of the invention
Embodiment 1
The master of the straightening equipment of a kind of thick axial workpiece shown in Fig. 1, Fig. 3 and Fig. 6, Fig. 7 looks in generalized section, frame mainly comprise base 1, support 14, guide rail 2.Base is fixed on the ground by foundation bolt, and guide rail is laid on the both sides of base upper surface, and two side stands are by guide rails assembling on base, and two side stands are connected with clamp system.Clamp system mainly comprises annular cylinder 3, dop 5 and movable wedge 4, is separately fixed on two side stands that are positioned on guide rail.Dop establishes the cylinder of cavity in being, this cylinder is provided with the conical through-hole corresponding with guide rail and the small diameter bore of two dops is mounted opposite, and two dop side faces are provided with axially relative evagination journal stirrup.In the conical cavity of this dop, be provided with that outside is the inclined-plane corresponding with it, inner side have with by movable wedge corresponding to the alignment workpiece end shaft shoulder, this movable wedge is connected with annular cylinder piston outer end by hinge.This movable wedge according to treating that the difference of alignment axle is changed, this annular cylinder piston the inner be positioned at annular cylinder without bar cannelure.This cannelure sidewall is positioned at opening and two bottom sides is established respectively into and out of oilhole.This annular cylinder is separately fixed on corresponding dop by flange.Rotary positioning mechanism mainly includes: hydraulic pressure is top 9, rotating mechanism 10 and spring 11.Hydraulic pressure is provided with top in the center slotted eye of above-mentioned annular cylinder, the slide block that in the middle part of it, slotted eye cross section, You Yigeyu center is corresponding, slide block end face is vertically fixed a fore-set coaxial with it, the end top of this fore-set is provided with thimble, there is spring in the outer surface cover of this fore-set, center slotted eye opening is provided with spring capping; Another end face of slide block is connected with connecting rod one end, and the other end that this connecting rod is positioned at outside annular cylinder through bottom land central through hole is connected with rotating mechanism, separately also establishes at bottom land center and the oil inlet and outlet passing in and out oil pipe and be connected.Between two dops, be provided with straightening mould mechanism, it mainly includes: straightening mould 7, connecting rod 12, hydraulic cylinder A 6 and hydraulic cylinder B 13.Hydraulic cylinder A is connected with both sides dop evagination journal stirrup respectively, and straightening mould is take axis as two distinguish straightening moulds of symmetry, and mold cavity is arc surface, and its arc surface radius of curvature is equal with the standard radius of alignment axle.Its respectively by bearing pin and connecting rod one end hinged, the two connecting rod other ends are connected with the two ends of same hydraulic cylinder B 13, and this hydraulic cylinder B 13 is fixed in frame.Respectively establish a fulcrum in the middle part of above-mentioned two connecting rods, this fulcrum is fixed in frame by journal stirrup.Control transmission system and mainly comprise Hydraulic Power Transmission System and electrical apparatus control system, Hydraulic Power Transmission System mainly contains pumping plant, fuel tank, valve group, pipeline composition, and pumping plant passes in and out oilhole with hydraulic cylinder A, hydraulic cylinder B with annular cylinder by the band valve pipeline be connected with fuel tank and is connected respectively.
Embodiment 2
Be described with reference to the accompanying drawings for certain train shaft: refer to Fig. 1, Fig. 2, according to train shaft 8 specification treating alignment, select the distinguish straightening mould 7 of the movable wedge 4 corresponding with train shaft spindle nose and axle bed and axle body equal diameters; The stroke of regulator solution cylinder pressure A 6, makes the displacement of dop 5 meet the length needs of train shaft 8.Open hydraulic cylinder A 6 promote dop 5, annular cylinder 3, movable wedge 4 and be arranged in that the hydraulic pressure of annular cylinder is top 9, rotating mechanism 10 and spring 11 etc. along guide rail 2 on base 1 to two lateral movements; Train shaft 8 is sent between the dop of straightening equipment left and right of the present invention by feeding device, simultaneously by the turnover oilhole at the bottom of annular cylinder central channel to the top slide block fuel feeding of hydraulic pressure, hydraulic pressure top 9 Compress Spring 11 under the effect of hydraulic oil, train shaft 8 is fixed on two hydraulic pressure top between.Hydraulic cylinder A 6 drives again dop 5, annular cylinder 3, movable wedge 4 to move to desired location stopping to the inside along guide rail 2, the spindle nose at train shaft 8 two ends and axle bed are included in the movable wedge 4 in hydraulic clamp 5, oil is drained by the turnover oilhole at the bottom of annular cylinder central channel, and hydraulic pressure top 9 is return under spring 11 acts on.To annular cylinder without bar cannelure fuel feed hole fuel feeding, annular cylinder 3 applies power F to piston
1, moved to the inside, so train shaft 8 spindle nose and axle bed are clamped by movable wedge 4 by the inner surface of hinge promotion movable wedge 4 along dop 5.The now axle bed of train shaft 8 and the flexural deformation of spindle nose is corrected in the clamping process of movable wedge 4, ensure that the axiality of axle bed and spindle nose simultaneously.
Refer to Fig. 3 and Fig. 4, hydraulic cylinder A 6 pairs of dops 5 apply axial force F laterally
2, dop 5 is in axial force F
2effect under, apply axial load F by movable wedge 5 pairs of train shafts 8
2, primer fluid cylinder pressure B13 promotes distinguish straightening mould 7 by connecting rod 12, the power F that straightening mould 7 applies at hydraulic cylinder B13
3effect under clamp the axle body of train shaft 8, all flexural deformations that train shaft 8 axle body wraps up in plane at straightening mould 7 are corrected.
Refer to Fig. 5, remove power F
3, F
2hydraulic cylinder B13 drives straightening mould 7 to return by connecting rod 12, by the turnover oilhole at the bottom of annular cylinder central channel to hydraulic pressure top chamber fuel feeding, hydraulic pressure top 9 Compress Spring under fluid pressure effect, train shaft 8 is fixed on equipment both sides hydraulic pressure top between; On annular cylinder 3, rod chamber turnover oilhole fuel feeding, just drives movable wedge 4 backhaul, unclamps axle bed and the spindle nose of train shaft 8; Start rotating mechanism 10 and drive train shaft 8 half-twist by hydraulic pressure top 9, repeat above-mentioned steps, all each plane in-plane bending distortion in the axial direction of train shaft 8 are namely by alignment.Remove power F
3, F
2, straightening mould 7 is return; Top 9 stretch out under fluid pressure effect, and fixing train shaft 8, unclamp movable wedge 4, dop 5 to the left and right both sides is return, and unloads train shaft 8, and the alignment of train shaft 8 terminates.
Embodiment 3
Refer to Fig. 6, Fig. 7, for certain polished rod axle, according to the specification of polished rod axle wanting alignment, select and the movable wedge 4 of polished rod axle bare terminal end equal diameters and axle body equal diameters distinguish straightening mould 7; The stroke of regulator solution cylinder pressure A 6, makes the displacement of dop 5 meet the length needs of axle.After adjustment, the aligning method of polished rod axle is identical with the aligning method of embodiment 2 train shaft, refers to embodiment 2.
Claims (3)
1. an aligning method for thick axial workpiece, is characterized in that: treat alignment workpiece and apply axial load, apply straightening power simultaneously, make the flexural deformation alignment of axle to axle body.
2. the aligning method of thick axial workpiece according to claim 1, is characterized in that: concrete steps are as follows:
1) primer fluid cylinder pressure A promote dop, annular cylinder, movable wedge and be arranged in that the hydraulic pressure of annular cylinder is top, rotating mechanism and spring etc. along guide rail on base to two lateral movements, until 2, left and right dop spacing is greater than and treats that alignment shaft length stops; To treat that the axle of alignment is sent between the dop of straightening equipment left and right of the present invention, simultaneously by the turnover oilhole at the bottom of annular cylinder central channel to the top slide block fuel feeding of hydraulic pressure, hydraulic pressure top under fluid pressure effect Compress Spring, axle is fixed on two hydraulic pressure top between;
2) hydraulic cylinder A drives dop, annular cylinder, movable wedge to stop along guide rail to move toward one another to desired location, axle two ends are included in the movable wedge in hydraulic clamp, oil is drained by the turnover oilhole at the bottom of annular cylinder central channel, and hydraulic pressure is top to be return under the action of the spring;
3) to annular cylinder without bar cannelure oil-in fuel feeding, annular cylinder then to piston apply power F
1, moved to the inside by the inner surface of hinge promotion movable wedge along dop, so axle is clamped by movable wedge, the flexural deformation of bare terminal end is simultaneously corrected;
4) hydraulic cylinder A is to dop applying axial force F laterally
2, dop under this force, applies axial load F by movable wedge to axle
2, make in alignment axle longitudinal section, to be produced the tension being less than yield stress;
5) axial load F is kept
2, primer fluid cylinder pressure B promotes distinguish straightening mold movement by connecting rod, and this straightening mould clamp shaft under the effect of hydraulic cylinder B applies straightening power F to axle body
3the flexural deformation of axle body is corrected;
6) power F is removed
2, F
3hydraulic cylinder B drives straightening mould to return by connecting rod, by the turnover oilhole at the bottom of annular cylinder central channel to the top fuel feeding of hydraulic pressure, hydraulic pressure top under fluid pressure effect Compress Spring, axle is fixed on equipment both sides hydraulic pressure top between, there is bar cannelure fuel feed hole fuel feeding to annular cylinder, just drive movable wedge to two lateral movements, unclamp the pinching end of axle; Start rotating mechanism by hydraulic pressure top drive axle half-twist, repeat above-mentioned 1-5 step, can by the flexural deformation alignment in axle in the axial direction each plane face.
3. the straightening equipment of the thick axial workpiece of claim 1, it is characterized in that: base fixes on the ground, guide rail is laid on the both sides of base upper surface, two side stands by guide rails assembling on base, two side stands are connected with clamp system, the annular cylinder of clamp system, dop and movable wedge are separately fixed on two side stands that are positioned on guide rail, dop establishes the cylinder of cavity in being, this cylinder is provided with the conical through-hole corresponding with guide rail and the small diameter bore of two dops is mounted opposite, two dop side faces are provided with axially relative evagination journal stirrup, outside is provided with for the inclined-plane corresponding with it in the conical cavity of this dop, inner side have with by movable wedge corresponding to the alignment workpiece end shaft shoulder, this movable wedge is connected with annular cylinder piston outer end by hinge, this annular cylinder piston the inner be positioned at annular cylinder without bar cannelure, this cannelure sidewall be positioned at opening and two bottom sides establish respectively into, oil outlet, this annular cylinder is separately fixed on corresponding dop, hydraulic pressure is provided with top in the center slotted eye of above-mentioned annular cylinder, the slide block that in the middle part of it, slotted eye cross section, You Yigeyu center is corresponding, slide block end face is vertically fixed a fore-set coaxial with it, the end top of this fore-set is provided with thimble, spring is had in the outer surface cover of this fore-set, center slotted eye opening is provided with spring capping, another end face of slide block is connected with connecting rod one end, the other end that this connecting rod is positioned at outside annular cylinder through bottom land central through hole is connected with rotating mechanism, separately also establishes at bottom land center and the oil inlet and outlet passing in and out oil pipe and be connected, straightening mould mechanism is provided with between two dops, its hydraulic cylinder A is connected with both sides dop evagination journal stirrup respectively, straightening mould is take axis as two distinguish straightening moulds of symmetry, mold cavity is arc surface, its arc surface radius of curvature is equal with the standard radius of alignment axle, its respectively by bearing pin and connecting rod one end hinged, the two connecting rod other ends are connected with the two ends of same hydraulic cylinder B, and this hydraulic cylinder B is fixed in frame, a fulcrum is respectively established in the middle part of above-mentioned two connecting rods, this fulcrum is fixed on by journal stirrup and frame controls transmission system mainly comprises Hydraulic Power Transmission System and electrical apparatus control system, Hydraulic Power Transmission System mainly contains pumping plant, fuel tank, valve group, pipeline composition, and pumping plant passes in and out oilhole with hydraulic cylinder A, hydraulic cylinder B with annular cylinder by the band valve pipeline be connected with fuel tank and is connected respectively.
Priority Applications (1)
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CN201410642826.8A CN104475496B (en) | 2014-11-14 | 2014-11-14 | The aligning method of a kind of thick axle part and equipment |
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CN201410642826.8A CN104475496B (en) | 2014-11-14 | 2014-11-14 | The aligning method of a kind of thick axle part and equipment |
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CN104475496A true CN104475496A (en) | 2015-04-01 |
CN104475496B CN104475496B (en) | 2016-06-29 |
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CN201410642826.8A Expired - Fee Related CN104475496B (en) | 2014-11-14 | 2014-11-14 | The aligning method of a kind of thick axle part and equipment |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN106270009A (en) * | 2016-08-01 | 2017-01-04 | 中车长春轨道客车股份有限公司 | A kind of alignment fetal membrane controlling slender axles reversible deformation |
CN106956141A (en) * | 2017-04-14 | 2017-07-18 | 杭州邦维流体技术有限公司 | A kind of fixture processed for roots rotor |
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CN104128396A (en) * | 2014-07-11 | 2014-11-05 | 重庆理工大学 | Workpiece straightening machine and straightening method thereof |
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JPS6199522A (en) * | 1984-10-23 | 1986-05-17 | Mitsubishi Heavy Ind Ltd | Straightening device of pipe |
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Publication number | Priority date | Publication date | Assignee | Title |
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CN106270009A (en) * | 2016-08-01 | 2017-01-04 | 中车长春轨道客车股份有限公司 | A kind of alignment fetal membrane controlling slender axles reversible deformation |
CN106956141A (en) * | 2017-04-14 | 2017-07-18 | 杭州邦维流体技术有限公司 | A kind of fixture processed for roots rotor |
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