CN109648020A - A kind of automobile mandrel efficient green rolling mill practice - Google Patents

A kind of automobile mandrel efficient green rolling mill practice Download PDF

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Publication number
CN109648020A
CN109648020A CN201811369929.6A CN201811369929A CN109648020A CN 109648020 A CN109648020 A CN 109648020A CN 201811369929 A CN201811369929 A CN 201811369929A CN 109648020 A CN109648020 A CN 109648020A
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CN
China
Prior art keywords
steel billet
rolling mill
steel
efficient green
mill practice
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201811369929.6A
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Chinese (zh)
Inventor
毛永艳
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Liuzhou Guofu Technology Co Ltd
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Liuzhou Guofu Technology Co Ltd
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Priority to CN201811369929.6A priority Critical patent/CN109648020A/en
Publication of CN109648020A publication Critical patent/CN109648020A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21HMAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H1/00Making articles shaped as bodies of revolution

Abstract

The invention discloses a kind of automobile mandrel bar efficient green rolling mill practices, comprising the following steps: S1 selects steel billet;Steel billet is put on conveyer by S2, and steel billet is sent into heating furnace by conveyer and is heated;The steel billet of heat treatment is transported to roughing mills by S3, the road Kun of coming out of the stove;Material after roughing is transported to cold scattering roller-way by S4;Material after cooling is transported to finish rolling and founds Kun unit by S5, cold scattering roller-way, carries out finish rolling;Material is carried out scale cutting by S6, the cutter for being set to the vertical Kun unit material output end of finish rolling;S7, center roller bar carry out an acceptance inspection.During present invention process, pollution-free, environmentally protective, and roll efficiently, it is suitable for large-scale promotion.

Description

A kind of automobile mandrel efficient green rolling mill practice
Technical field
The present invention relates to automobile parts manufacture field more particularly to a kind of automobile mandrel efficient green rolling mill practices.
Background technique
Mandrel is solely subjected to moment of flexure without transmitting torque, some central axis, such as rolling stock for support rotary part Axis etc., some mandrels do not rotate then, such as the axis of supporting pulley.Whether rotated when being worked according to axis, mandrel can be divided into rotation again Mandrel and stationary spindle.
In order to guarantee the safety and service life of automobile, it is necessary to assure the quality of mandrel.In the prior art, automobile mandrel Process cumbersome, quality cannot be guaranteed, and not environmentally.
Summary of the invention
The purpose of the present invention is to solve disadvantages existing in the prior art, and a kind of automobile mandrel proposed is efficient Green rolling mill practice.
To achieve the goals above, present invention employs following technical solutions:
A kind of automobile mandrel bar efficient green rolling mill practice, comprising the following steps:
S1 selects steel billet;
Steel billet is put on conveyer by S2, and steel billet is sent into heating furnace by conveyer and is heated;
The steel billet of heat treatment is transported to roughing mills by S3, the road Kun of coming out of the stove;
Material after roughing is transported to cold scattering roller-way by S4;
Material after cooling is transported to finish rolling and founds Kun unit by S5, cold scattering roller-way, carries out finish rolling;
Material is carried out scale cutting by S6, the cutter for being set to the vertical Kun unit material output end of finish rolling;
S7, center roller bar carry out an acceptance inspection.
Preferably, in the S1, steel billet carries out the verification of object card, shape dimension measurement, surface quality inspection, record, carries out Selection.
Preferably, in the S2, heating furnace be three sections of continuous-type furnaces, heating process be preheating section, bringing-up section and Hot arc.
Preferably, the preheating section preheats steel billet for heating fume afterheat, 300~450 DEG C of temperature, described Bringing-up section is heated up to 1150~1250 DEG C to preheating steel billet again, and soaking section temperature is 1180~1250 DEG C.
Preferably, in the S4, it is provided with blower right above the cold scattering roller-way, is cooled to 150-100 DEG C.
Preferably, in the S6, cutting influences the position such as steel head and tail that steel use defect, determines what user needed Length.
Preferably, in the S7, to mandrel rod material outer dimension, surface quality, cut lengths, deviation of weight, processing performance, Mechanical performance carries out comprehensive detection examination.
Compared with prior art, the beneficial effects of the present invention are:
1, of the invention, the plasticity of steel is improved, inside steel billet tissue can be eliminated or mitigate by reducing resistance of deformation in order to roll Defect.
2, the present invention passes through, and is provided with blower right above cold scattering roller-way, is cooled to 150-100 DEG C, solid to restore steel Some physical properties and convenient for guaranteeing shearing quality and rear step process operations.
3, of the invention, two groups of milling trains of continous way have very high mechanization, automation, mill speed and rolling accuracy, because And labor productivity height and excellent product quality.
In the present invention, it is not directed to part in the technique and is the same as those in the prior art or can be realized by using the prior art, The present invention improves the plasticity of steel, and inside steel billet tissue defects can be eliminated or mitigate by reducing resistance of deformation in order to roll.
Specific embodiment
The following is a clear and complete description of the technical scheme in the embodiments of the invention, it is clear that described embodiment Only a part of the embodiment of the present invention, instead of all the embodiments.
Embodiment 1: a kind of automobile mandrel bar efficient green rolling mill practice, comprising the following steps: S1 selects steel billet; Steel billet is put on conveyer by S2, and steel billet is sent into heating furnace by conveyer and is heated;S3, the road Kun of coming out of the stove will heat Steel billet be transported to roughing mills;Material after roughing is transported to cold scattering roller-way by S4;S5, cold scattering roller-way is by material after cooling Material is transported to finish rolling and founds Kun unit, carries out finish rolling;S6, be set to finish rolling stand Kun unit material output end cutter by material into Row scale is cut;S7, center roller bar carry out an acceptance inspection.
In the S1, steel billet carries out the verification of object card, shape dimension measurement, surface quality inspection, record, is selected, no Qualified steel billet must not enter furnace.
In the S2, heating furnace is three sections of continuous-type furnaces, and heating process is preheating section, bringing-up section and soaking zone, drop Inside steel billet tissue defects can be eliminated or be mitigated to low resistance of deformation in order to roll.
The preheating section preheats steel billet for heating fume afterheat, 400 DEG C of temperature, with energy saving, green ring Protect, the bringing-up section is heated up to 1200 DEG C to preheating steel billet again, and soaking section temperature is 1200 DEG C, reduce steel billet internal-external temperature difference and Eliminate water cooling slideway black mark, stable and uniform heating quality.
In the S4, it is provided with blower right above the cold scattering roller-way, is cooled to 110 DEG C, it is intrinsic to restore steel Physical property and convenient for guaranteeing shearing quality and rear step process operations.
In the S6, cutting influences the position such as steel head and tail that steel use defect, determines the length that user needs.
In the S7, to mandrel rod material outer dimension, surface quality, cut lengths, deviation of weight, processing performance, mechanicalness It can be carried out comprehensive detection examination.
Rolling process must produce products characteristics and Technical facilities in production energy according to product technology standard or technical requirements The requirement of power and production cost and worker's working condition etc., formulates corresponding Bar Rolling Process regulation and process duct Reason system.To ensure rolling product quality and being optimal of technical-economic index.
Rolling process generally by one group or two groups of roughing mills, middle milling train and mm finishing mill unit at.Steel billet section pressure is undertaken respectively Contracting, semi-finished product rolling deformation and finished product roll function.Finisher pass or finishing groove are the hole K1, design of section of rolling mill before finished product For the hole K2, preceding design of section of rolling mill is the hole K3 before finished product, is so analogized below.
Continuous rolling mill refers to that several mill stands are in line by rolling direction sequence, and rolled piece is simultaneously in several milling trains Rolling deformation, each frame mill speed increases with the increase of length of rolled piece, and keeps second flow of the metal in every rolling mill Rolling mode that is equal or having slight heap to draw steel relationship claims continuous rolling mill.Continuous rolling mill have very high mechanization, from Dynamicization, mill speed and rolling accuracy, thus labor productivity height and excellent product quality are bar and wire mill transformations and new The direction built.It is maintained in the unit time rolled piece and claims tandem rolling by the equal rolling of each milling train volume.
Continuous rolling constant=F1D1N1=F2D2N2=F3D3N3=FnDnNn
In formula: F-rolled piece cross-sectional area mm2
D-roll working diameter mm
N-roll revolution (1/min)
The present embodiment, two groups of milling trains of continous way have very high mechanization, automation, mill speed and rolling accuracy, thus labor Dynamic productivity height and excellent product quality.
A kind of embodiment 2: automobile mandrel bar efficient green rolling mill practice, which comprises the following steps: S1 selects steel billet;Steel billet is put on conveyer by S2, and steel billet is sent into heating furnace by conveyer and is heated;S3, come out of the stove Kun The steel billet of heat treatment is transported to roughing mills by road;Material after roughing is transported to cold scattering roller-way by S4;S5, cold scattering roller-way Material after cooling is transported to finish rolling and founds Kun unit, carries out finish rolling;S6 is set to finish rolling and stands cutting for Kun unit material output end It cuts machine and material is subjected to scale cutting;S7, center roller bar carry out an acceptance inspection.
In the S1, steel billet carries out the verification of object card, shape dimension measurement, surface quality inspection, record, is selected, no Qualified steel billet must not enter furnace.
In the S2, heating furnace is three sections of continuous-type furnaces, and heating process is preheating section, bringing-up section and soaking zone, drop Inside steel billet tissue defects can be eliminated or be mitigated to low resistance of deformation in order to roll.
The preheating section preheats steel billet for heating fume afterheat, 420 DEG C of temperature, with energy saving, green ring Protect, the bringing-up section is heated up to 1180 DEG C to preheating steel billet again, and soaking section temperature is 1180 DEG C, reduce steel billet internal-external temperature difference and Eliminate water cooling slideway black mark, stable and uniform heating quality.
In the S4, it is provided with blower right above the cold scattering roller-way, is cooled to 125 DEG C, it is intrinsic to restore steel Physical property and convenient for guaranteeing shearing quality and rear step process operations.
In the S6, cutting influences the position such as steel head and tail that steel use defect, determines the length that user needs.
In the S7, to mandrel rod material outer dimension, surface quality, cut lengths, deviation of weight, processing performance, mechanicalness It can be carried out comprehensive detection examination.
Steel inspection is to ensure that product quality meets the critical process of product technology standard and technical conditions.The examination and test of products is logical It often include: steel outer dimension, surface quality, cut lengths, deviation of weight, processing performance, mechanical performance etc..Product is not met The steel of quality standard must choose and disposition of classifying.
Product surface common deficiency and precautionary measures stick, the usual regulation surface of wire product must not have crackle, folding, ear Son, the defects of scabbing, be layered and being mingled with;
A, the generation and prevention of crack defect: feature: being presented deep mixed and dispersion hair-like microgroove in steel billet or steel surface, Generally unevenly arranged along rolling direction;Producing cause: the rimhole of continuous casting billet, surface pores, non-metallic inclusion, heating Temperature is uneven, steel temperature is too low or roller repairing is improper (such as carbon constructional quality steel);Precautionary measures: steel-making should perform molten steel It smelts and degassing work, reduction tapping temperature avoids secondary oxidation using protective casting;Steel rolling should rationally control furnace temperature and cold But speed.B, fold: feature: steel surface is along rolling direction part is longer or the defect of continuous approximate crackle, generally in straight It is linear;Producing cause: rolled piece semi-finished product occur when the rolled piece after the ears or side handles of a utensil, serious damage or pass mistake roller rerolls processed corner part without Method spreads apart and causes;Precautionary measures: semi-finished product workpiece measurement is rationally controlled, should check rolled piece through common wooden stick in production process Whether there is or not the ears or side handles of a utensil and pass mistake roller phenomenon on roll gap both sides;Pay attention to observing rolled piece operation conditions.C, the ears or side handles of a utensil: feature: steel roll gap both sides Or unilateral over-fill along rolling direction causes local or continuous raised position;Producing cause: leader pass rolled piece supplied materials is big;Into Mouth guide and guard are inclined, loose, and rolled piece is helped not just;Roll axial float;Heating is uneven or temperature is too low;Last groove abrasion, which generates, has platform The protrusion of rank;Precautionary measures: the rationally control mild semi-finished dimensions of heating furnace;The adjustment of stringent guide and guards;It is pre- to improve milling train Fill precision;At regular time and quantity fall pass.D, scab: feature: steel surface differs in size in blocky or fish scale-shaped, uneven thickness, outer Shape irregular " tongue shape " or " nail-shaped " scar.Divide closure or is not closed;There are root or unrooted.It scabs following general with aerobic Change iron sheet.Skin is also known as stuck up in scabbing for tilting;Producing cause: steel billet scabs, pipe, the defects of being mingled with;Semi-finished product rolled piece exists Local convex;Pass chip off-falling or trachoma;Pass indentation or crator are bad;Rolled piece skids in pass;Extraneous metal is rolled into rolled piece Surface;Semi-finished product rolled piece is by external items scratch etc.;Precautionary measures: unqualified steel billet must not enter furnace;Pass takes indentation or weldering When scar, quarter, welding trace shape and height should be gentle round and smooth;Reinforce roll quality inspection;Reasonable hole type design;Forbid low temperature, blackhead Steel rolling;Running check pass collocation situation and the pass that falls in time;Rolled piece Transporting equipment and operational site should be clean and tidy round and smooth.E, it draws Trace (scratches, scratch): feature: steel surface has local or interrupted groove mark, general linear or arc;Producing cause: import, Outlet guide processes Rig up error or rolled piece Transporting equipment scratches;Rolled piece is disengaged from the groove unfavorable;Precautionary measures: it correctly processes, install, make With inlet and outlet guide and guard facility;Rolled piece Transporting equipment and operational site should be clean and tidy round and smooth.F, pit: feature: steel surface has part Periodical or irregular concave defect;Producing cause: rolling groove has convex block or is stained with iron scale;Steel surface unrooted That scabs falls off;Extraneous metal article substitutes into pass and is formed after rolling falls off;Precautionary measures: pass cooling water should be clean, water Amount answers abundance;Billet quality is qualified;Production environment no-sundries.
The present embodiment passes through to steel outer dimension, surface quality, cut lengths, deviation of weight, processing performance, mechanicalness Comprehensive detection check and accept, it is ensured that the quality of product.
The present invention, in technical process, pollution-free, environmentally protective, and roll efficiently, it is suitable for large-scale promotion.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto, Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.

Claims (7)

1. a kind of automobile mandrel bar efficient green rolling mill practice, which comprises the following steps:
S1 selects steel billet;
Steel billet is put on conveyer by S2, and steel billet is sent into heating furnace by conveyer and is heated;
The steel billet of heat treatment is transported to roughing mills by S3, the road Kun of coming out of the stove;
Material after roughing is transported to cold scattering roller-way by S4;
Material after cooling is transported to finish rolling and founds Kun unit by S5, cold scattering roller-way, carries out finish rolling;
Material is carried out scale cutting by S6, the cutter for being set to the vertical Kun unit material output end of finish rolling;
S7, center roller bar carry out an acceptance inspection.
2. a kind of automobile mandrel bar efficient green rolling mill practice according to claim 1, which is characterized in that the S1 In, steel billet carries out the verification of object card, shape dimension measurement, surface quality inspection, record, is selected.
3. a kind of automobile mandrel bar efficient green rolling mill practice according to claim 1, which is characterized in that the S2 In, heating furnace is three sections of continuous-type furnaces, and heating process is preheating section, bringing-up section and soaking zone.
4. a kind of automobile mandrel bar efficient green rolling mill practice according to claim 3, which is characterized in that described pre- Hot arc preheats steel billet for heating fume afterheat, 300~450 DEG C of temperature, and the bringing-up section adds preheating steel billet again For temperature to 1150~1250 DEG C, soaking section temperature is 1180~1250 DEG C.
5. a kind of automobile mandrel bar efficient green rolling mill practice according to claim 1, which is characterized in that the S4 In, it is provided with blower right above the cold scattering roller-way, is cooled to 150-100 DEG C.
6. a kind of automobile mandrel bar efficient green rolling mill practice according to claim 1, which is characterized in that the S6 In, cutting influences the position such as steel head and tail that steel use defect, determines the length that user needs.
7. a kind of automobile mandrel bar efficient green rolling mill practice according to claim 1, which is characterized in that the S7 In, comprehensive detection is carried out to mandrel rod material outer dimension, surface quality, cut lengths, deviation of weight, processing performance, mechanical performance It checks and accepts.
CN201811369929.6A 2018-11-17 2018-11-17 A kind of automobile mandrel efficient green rolling mill practice Pending CN109648020A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110479924A (en) * 2019-08-26 2019-11-22 张家港中环海陆高端装备股份有限公司 Large-scale ring forging streamlined manufacturing process
CN111389905A (en) * 2020-03-31 2020-07-10 湖北金盛兰冶金科技有限公司 Temperature-control rolling-control technology for bar

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110479924A (en) * 2019-08-26 2019-11-22 张家港中环海陆高端装备股份有限公司 Large-scale ring forging streamlined manufacturing process
CN110479924B (en) * 2019-08-26 2020-11-13 张家港中环海陆高端装备股份有限公司 Production line type manufacturing method of large-scale ring forging
CN111389905A (en) * 2020-03-31 2020-07-10 湖北金盛兰冶金科技有限公司 Temperature-control rolling-control technology for bar

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