CN104759828A - Method for repairing plate of hot strip rolling mill online - Google Patents

Method for repairing plate of hot strip rolling mill online Download PDF

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Publication number
CN104759828A
CN104759828A CN201510097359.XA CN201510097359A CN104759828A CN 104759828 A CN104759828 A CN 104759828A CN 201510097359 A CN201510097359 A CN 201510097359A CN 104759828 A CN104759828 A CN 104759828A
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CN
China
Prior art keywords
memorial archway
welding
built
mill housing
face
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CN201510097359.XA
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Chinese (zh)
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CN104759828B (en
Inventor
李亘
庞芳芳
王长建
陈传盛
刘继梅
梁军
许倩
谢晶
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Shandong Iron and Steel Group Co Ltd SISG
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Shandong Iron and Steel Group Co Ltd SISG
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Application filed by Shandong Iron and Steel Group Co Ltd SISG filed Critical Shandong Iron and Steel Group Co Ltd SISG
Priority to CN201510097359.XA priority Critical patent/CN104759828B/en
Publication of CN104759828A publication Critical patent/CN104759828A/en
Application granted granted Critical
Publication of CN104759828B publication Critical patent/CN104759828B/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P6/00Restoring or reconditioning objects

Abstract

The invention provides a method for repairing a plate of a hot strip rolling mill online. The method comprises the steps of 1, dismounting and removing; 2, detecting abrasion loss according to a fixed reference; 3, repairing the damaged plate surface; 4, repairing failed bolt holes in the plate surface online through a positioning die plate and a drilling machine; 5, mounting an upper sliding plate and a lower sliding plate, and finally detecting the size. The method has the advantages that the dimensional tolerance and the geometric tolerance of the plate surface and the bolt hole can be ensured by the online repair technology method; the combining strength and stability of a welding machine and the plate can be improved; the efficiency is increased by online repairing, and the repairing time can be also reduced.

Description

A kind of method of online reparation hot strip rolling mill memorial archway
Technical field
The invention belongs to rolling machinery technical field, specifically, the present invention be more particularly directed to a kind of method of online reparation hot strip rolling mill memorial archway.
Background technology
Smelter, hot strip rolling mill memorial archway is through the compound invasion and attack of long load operation and rolling cooling water, iron scale, and the corrosive wear of mill housing contact surface is serious, and slide plate fixing threaded hole lost efficacy, window is difficult to regulation and control, affects stable smooth operation and the product quality of rolling.Conventional human weld's interpolation reconditioning and reaming tapping are difficult to ensure repair quality, poor effect.Expansion, the adjustment of rolling mill practice and the high request of product quality output is widened along with rolled products, the problem that mill housing exposes shows its restriction day by day, therefore need to repair mill housing, the raising mill housing performance improving and lost precision, ensure the demand of product high-quality high production capacity.
Repair according to metal mending liquid, this kind of recovery technique operation is more simple and convenient, can repair memorial archway Local Damaged place, but because repair liquid and matrix do not form metallurgical connection, its bond strength is not high, bears larger impact and can cause peeling off of repairing metal in the memorial archway course of work.
According to comparatively advanced laser melting and coating technique, mill housing surface is repaired, with the coating material with good anticorrosion antiwear performance, the characteristic on thorough change memorial archway surface, improve the memorial archway life-span, memorial archway is avoided to be out of shape, avoid the harm that the surperficial machined reparation frequently of memorial archway is brought, then need to carry out off-line reparation to memorial archway.Allegro production actual state, does not allow the off-line of leaving the post of any frame memorial archway, and therefore this recovery technique cannot adapt to the needs that fast pace is produced at present.Technical staff cannot solve an above-mentioned difficult problem by multiple ways and means.
At present, the repairing quality of mill housing can accomplish that again online reparation is shortened repair time and raised the efficiency to adopt which kind of recovery technique to ensure, ensures that production becomes bottleneck problem.
Summary of the invention
The object of the present invention is to provide a kind of method of online reparation hot strip rolling mill memorial archway, the present invention can repair hot rolling mill memorial archway online, can ensure repairing quality, and online repair time is short simultaneously.
For achieving the above object, present invention employs following technical scheme:
A method for online reparation hot strip rolling mill memorial archway, comprises the following steps:
Step one, two pieces of slide plates up and down of damage equipped on mill housing face to be repaired to be removed, on-line cleaning is carried out to described mill housing face to be repaired and each screwed hole be positioned on described mill housing face to be repaired and removes the greasy dirt impurity on surface; Remove the fatigue layer on rolling memorial archway face to be repaired afterwards;
Step 2, choosing in frame body without the need to the surface of repairing as measuring the datum level of described mill housing surface wear amount to be repaired, measuring the wear extent in described mill housing face to be repaired afterwards according to described datum level;
Step 3, the wear extent recorded according to step 2, the mill housing face after the described mill housing face to be repaired of online reparation makes reparation reaches necessary requirement;
Step 4, locating template identical for structure that is upper with described or lower skateboard is adjacent to respectively the first half and the latter half in the mill housing face after repairing through step 3, carry out tuning on-line and define each screwed hole mill housing face needing repair, adopt drilling machine to carry out online machined reparation by the machining hole corresponding with each screwed hole on described mill housing face that described locating template is arranged to each screwed hole on described mill housing face afterwards, after repairing each screwed hole on described mill housing face, remove described locating template;
Step 5, the upper lower skateboard processed according to life size is installed on the relevant position in the mill housing face of repairing through step 4.
In the method for above-mentioned online reparation hot strip rolling mill memorial archway, more preferably: in described step 3, the method that the mill housing face after the described mill housing face to be repaired of described online reparation makes reparation reaches necessary requirement comprises the steps:
Framework scribe step:
The first half in described mill housing face to be repaired marks a rectangle frame line, the corner of described rectangle frame line is respectively a1, a2, a3, a4, a1, a2, a3, a4 occupy four angles of the first half in described mill housing face to be repaired successively simultaneously, b1, b2, b3, b4 are followed successively by the mid point of a1a2 line, a2a3 line, a3a4 line, a4a1 line, a1 and a3 connects line, a2 and a4 connects line, b1, b2, b3, b4 appoint and all connect line between the two, and the whole lines marked form the first half frame line; Described the latter half frame line is formed according to the mode forming described the first half frame line;
Built-up welding step on frame line:
In described the first half frame line and the enterprising windrow weldering of described the latter half frame line, form elementary general frame;
Built-up welding step in described elementary general frame:
Carry out built-up welding in each gore in described elementary general frame, form multiple triangle built-up welding raised face, the thickness of described triangle built-up welding raised face is greater than the thickness of described elementary general frame, is greater than described wear extent simultaneously;
Elementary general frame continues the step of built-up welding:
Described elementary general frame continues built-up welding, until the consistency of thickness of thickness and described triangle built-up welding raised face, thus forms secondary general frame, jointly form first time memorial archway repair surface by described secondary general frame and described triangle built-up welding raised face; Wherein said elementary general frame continues welding rod material hardness that built-up welding in the step of built-up welding uses and be greater than the welding rod material hardness that on described frame line, in built-up welding step and described elementary general frame, in built-up welding step, built-up welding uses;
First time memorial archway repair surface machining steps: machined is carried out to described first time memorial archway repair surface and levelling, thus makes the mill housing face after machined reparation reach necessary requirement.
In the method for above-mentioned online reparation hot strip rolling mill memorial archway, more preferably: the thickness of the elementary general frame obtained in built-up welding step on described frame line is 1mm ~ 1.5mm.
In the method for above-mentioned online reparation hot strip rolling mill memorial archway, more preferably: the thickness of the triangle built-up welding raised face obtained in built-up welding step in described elementary general frame is 4mm ~ 5mm.
In the method for above-mentioned online reparation hot strip rolling mill memorial archway, more preferably: on described frame line in built-up welding step and described elementary general frame in built-up welding step, the welding material that described built-up welding adopts is THJ422 welding rod; Described core diameter is 2.5/3.2/4.0mm; Type is structural steel; Described built-up welding adopts the built-up welding of short arc low_input_power amount; Described welding rod length preferably 350 ~ 400mm.
In the method for above-mentioned online reparation hot strip rolling mill memorial archway, more preferably: continue on elementary general frame in the step of built-up welding, the welding material that described built-up welding adopts is the shock-resistant hardfacing electrode of siderochrome molybdenum boron.
In the method for above-mentioned online reparation hot strip rolling mill memorial archway, more preferably: in the machining steps of described first time memorial archway repair surface,
If: described first time memorial archway repair surface be perpendicular, then memorial archway repair surface is memorial archway plane described first time, directly carries out following milling machine procedure of processing to described memorial archway plane;
If: described first time memorial archway repair surface do not form perpendicular, then first grind to obtain memorial archway plane to described first time memorial archway repair surface, carry out following milling machine procedure of processing afterwards;
Milling machine procedure of processing:
With milling machine, online machining is carried out to described memorial archway plane, align with the size and morpheme that make described memorial archway plane and original int mill housing face, obtain second time memorial archway repair surface;
If: described second time memorial archway repair surface is perpendicular, then described second time memorial archway repair surface be reach necessary requirement machining repair after mill housing face;
If: described second time memorial archway repair surface does not form perpendicular, then research described second time memorial archway repair surface, to obtain perpendicular, thus obtains the mill housing face after the machining reparation reaching necessary requirement.
In the method for above-mentioned online reparation hot strip rolling mill memorial archway, more preferably: in described milling machine procedure of processing, described milling machine carries out on-line machining in the following way:
Described milling machine to be arranged in base frock and milling machine described in centering;
The integral hoisting base frock comprising milling machine and base frock is put on the slide rail of the side of described frame body;
Again described integral hoisting base frock is pushed in described frame body, and make described integral hoisting base frock be placed on lower padding iron;
Finally by described milling machine, machining is carried out to described memorial archway plane.
In the method for above-mentioned online reparation hot strip rolling mill memorial archway, more preferably: in described step 4, described drilling machine carries out online machined reparation to each screwed hole on described mill housing face in the following way:
Described drilling machine to be arranged in base frock and drilling machine described in centering;
The integral hoisting base frock comprising described drilling machine and described base frock is put on the slide rail of the side of frame body;
Again described integral hoisting base frock is pushed in described frame body, and make described integral hoisting base frock be placed on lower padding iron;
Finally by described drilling machine, online machined reparation is carried out to each screwed hole on described mill housing face.
In the method for above-mentioned online reparation hot strip rolling mill memorial archway, more preferably: in the machining steps of described first time memorial archway repair surface, described grinding adopts abrasion wheel grinding.
Analyze known, compared with prior art, advantage of the present invention and beneficial effect are:
One, online recovery technique provided by the invention can ensure the repairing quality of mill housing, avoid the deficiency of milling train necessary off-line length repair time simultaneously, shorten memorial archway and improve equipment use efficiency repair time, can repair within the production line overall ten day time of overhaul can be utilized.
Two, the simple in equipment such as milling machine, drilling machine of the present invention's employing, is convenient to processing and manufacturing, easy to use, is convenient to the control arranging and realize precision.
Three, the function that the present invention makes full use of milling machine and drilling machine can make memorial archway face, the dimensional tolerance of bolt hole and form and position tolerance reach intrinsic instructions for use by detection, solves the technological difficulties that the measurement of memorial archway repair surface form and position tolerance is determined.
Four, in memorial archway welding, adopt the compound welding technology of two kinds of different welding material, not only increase bond strength and the stability of welding material and mill housing, turn improve hardness and the wearability of memorial archway and slide plate faying face.
Five, the online restorative procedure of memorial archway provided by the invention is simple to operate, efficiency is high, small investment, and instant effect, is beneficial to popularization, and cost efficiency recycles.
Accompanying drawing explanation
Fig. 1 is the mill housing schematic diagram of prior art.
Fig. 2 is the structural representation of upper or the latter half frame line of the method for online reparation mill housing of the present invention.
Fig. 3 is the front view of the base frock of the method for online reparation mill housing of the present invention.
Fig. 4 is the left view of the base frock of the method for online reparation mill housing of the present invention.
Fig. 5 is the top view of the base frock of the method for online reparation mill housing of the present invention.
Fig. 6 is the structural representation that the milling machine of the method for online reparation mill housing of the present invention is installed.
Fig. 7 is the front view of the locating template of the method for online reparation mill housing of the present invention.
Fig. 8 is that the A-A of the locating template of the method for online reparation mill housing of the present invention is to sectional view.
Fig. 9 is the structural representation that the drilling machine of the method for online reparation mill housing of the present invention is installed.
Figure 10 is the front view of the slide plate of the method for online reparation mill housing of the present invention.
Figure 11 is that the A-A of the slide plate of the method for online reparation mill housing of the present invention is to sectional view.
Wherein, 1-base frock; Plane in 11-frock; 12-connecting plate; 13-takes over; 14-bolt hole; 15-first slide rail; 16-second slide rail; 2-locating template; 21-locating hole; 3-slide plate; 31-installing hole; 32-slideway; 4-memorial archway face; 5-slide rail; 6-milling machine; 7-drilling machine; 8-frame body; 9-round nut hole; 10-lower padding iron.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further details.
As shown in Fig. 1, Figure 10 and Figure 11, in figure, frame body 8 has four surfaces, outwardly memorial archway face 4 is provided with at the medium position on each surface, the thickness that memorial archway face 4 is protruded is 3mm, memorial archway face 4 is divided into memorial archway face and lower memorial archway face (i.e. the first half in memorial archway face and the latter half), and upper memorial archway face is the rectangular shape that shape is identical with lower memorial archway face; Upper memorial archway face and lower memorial archway face are equipped with four screwed holes, in upper memorial archway face and lower memorial archway face place, one slide-plate 3 is installed respectively, these two pieces of slide plates 3 are called upper slide and lower skateboard, concrete mounting means is, every block slide plate 3 has four installing holes 31, the screwed hole one_to_one corresponding in the installing hole 31 of slide plate 3 and upper memorial archway face or lower memorial archway face, slide plate 3 is arranged on upper memorial archway face (or lower memorial archway face) through the installing hole 31 of slide plate 3 and the screwed hole in upper memorial archway face (or lower memorial archway face) by bolt; Frame body 8 is also provided with lower padding iron 10, and lower padding iron 10 is positioned at the below of lower skateboard, and frame body 8 also has round nut hole 9, and round nut hole 9 is positioned at the top of upper slide.Two pieces of slide plates 3 all have slideway 32, and the slideway 32 of slide plate 3 aligns with the inner slide of frame body 8, the slideway 32 of two pieces of slide plates 3 and the inner slide key operation of frame body 8 be for inner hook rise and fall up and down working roll time use.
A method for online reparation hot strip rolling mill memorial archway, it is as follows that it comprises step:
Step one, dismounting cleaning:
Two pieces of slide plates 3 up and down of damage equipped on mill housing face 4 to be repaired are removed, on-line cleaning is carried out to mill housing face 4 to be repaired and each screwed hole be positioned on mill housing face 4 to be repaired and removes the greasy dirt impurity on surface; Remove the fatigue layer on rolling memorial archway face 4 to be repaired afterwards;
Particularly, the fatigue layer polishing adopting emery wheel to be lost efficacy in memorial archway face 4 to be repaired is removed;
Step 2, determine benchmaring wear extent:
To choose in frame body 8 without the need to the surface of repairing as the datum level measuring mill housing face 4 wear extent to be repaired, frame body 8 surface preferably as far as possible near memorial archway face 4 to be repaired, can increase the accuracy of measurement data further; Adopt horizon rule, depth gauge rule survey tool benchmark to measure in the face of memorial archway face 4 to be repaired, determine wear extent according to measurement data;
When mill housing normally uses, memorial archway face 4 3mm thicker in the surface of frame body 8, therefore, when repairing impaired memorial archway face 4, using the surface of frame body 8 as datum level, measurement being carried out to memorial archway face 4 to be repaired and can obtain wear extent more accurately;
Step 3, repair impaired memorial archway face (memorial archway face namely to be repaired):
According to the wear extent that step 2 records, the mill housing face after the impaired mill housing face 4 of online reparation makes reparation reaches necessary requirement; The repair process of step 3 will be described in detail later.
The inefficacy screwed hole on memorial archway face repaired online by step 4, use locating template and drilling machine:
The first half and the latter half (also can be described as upper memorial archway face and lower memorial archway face) in the mill housing face after repairing through step 3 is adjacent to respectively by with upper or that lower skateboard 3 structure is identical locating template 2, carry out tuning on-line and define each screwed hole to be repaired on mill housing face, adopt drilling machine 7 to carry out online machined reparation by each screwed hole on machining hole 21 pairs of mill housing faces corresponding with each screwed hole on mill housing face of setting on locating template 2 afterwards, after repairing each screwed hole on mill housing face, remove locating template 2;
Particularly, the structure of locating template 2 is identical with structure that is upper or lower skateboard 3, and locating template 2 is provided with four machining holes 21, and the machining hole 21 of locating template 2 is identical with the position of the installing hole 31 of upper or lower skateboard 3; Locating template 2 is adjacent on after repairing through step 3 on memorial archway face, the location of each screwed hole to be repaired on memorial archway face in realization, is gone out the new screwed hole in upper memorial archway face afterwards by the online machining of drilling machine 7, and tapping is carried out to new screwed hole; In like manner online machining is carried out to process the new screwed hole on lower memorial archway face to the lower memorial archway face after step 3 reparation, and tapping is carried out to new screwed hole;
In this step 4, present invention achieves online object of repairing each screwed hole on memorial archway face, shorten the repair time of mill housing, improve efficiency, and ensure that reparation precision.
Step 5, install lower skateboard 3: the relevant position upper lower skateboard processed according to life size being installed on the mill housing face after step 4 is repaired.
Particularly, upper slide is arranged on the upper memorial archway face place in the mill housing face after step 4 is repaired, lower skateboard is installed the lower memorial archway face place in the mill housing face after step 4 is repaired; Namely first upper lower skateboard is closely attached on respectively on upper memorial archway face and lower memorial archway face, then, by four bolts through the installing hole 31 of upper slide and the screwed hole in above-mentioned upper memorial archway face, upper slide to be arranged on this on memorial archway face, lower skateboard, through the installing hole 31 of lower skateboard and the screwed hole in above-mentioned lower memorial archway face, is arranged on this lower memorial archway installed surface by four bolts; Whether the position detecting installing hole 31 after installation reaches requirement, detects dimensional tolerance and the form and position tolerance (i.e. form tolerance and position of related features) of each bolt hole on memorial archway face, to ensure that upper lower skateboard can normal mounting use.
Be described in detail to the step 3 in the inventive method below.
In above-mentioned steps three, repair impaired memorial archway face and comprise following a few step:
3.1, framework line:
Various ways can be adopted in framework scribe step to rule to mill housing face 4 to be repaired, thus determine the first half frame line and the latter half frame line, such as can adopt lines that memorial archway face under memorial archway face on rectangle milling train to be repaired and rectangle milling train is divided into several square, triangle, rhombus or rectangles, thus form the first half frame line and the latter half frame line by these lines.
Built-up welding step on 3.2 frame lines:
In the first half frame line and the enterprising windrow weldering of the latter half frame line, form elementary general frame.
3.3, built-up welding step in elementary general frame:
Carry out built-up welding in each piece in elementary general frame, form multiple built-up welding raised face, the thickness of described built-up welding raised face is greater than the thickness of elementary general frame, is greater than described wear extent simultaneously.
3.4, elementary general frame continues the step of built-up welding:
Elementary general frame continues built-up welding, until the consistency of thickness of thickness and described built-up welding raised face, thus forms secondary general frame, jointly form first time memorial archway repair surface by secondary general frame and built-up welding raised face.
Preferably, in above-mentioned steps three, repair impaired memorial archway face and comprise following a few step:
3.1, framework line:
Mill housing face 4 to be repaired is divided into memorial archway face and memorial archway face the first half and lower memorial archway face and memorial archway face the latter half, as shown in Figure 2, upper memorial archway face is marked a rectangle frame line, the corner of rectangle frame line is respectively a1, a2, a3, a4, a1 simultaneously, a2, a3, a4 occupies four angles in upper memorial archway face to be repaired successively, b1, b2, b3, b4 occupies a1a2 line successively, a2a3 line, a3a4 line, the mid point of a4a1 line, a1 and a3 connects line, a2 and a4 connects line, b1, b2, b3, b4 appoints and all connects line between the two, the whole lines marked form the first half frame line, described the latter half frame line is formed according to the mode forming described the first half frame line,
3.2, built-up welding step on frame line:
In the first half frame line and the enterprising windrow weldering of the latter half frame line, form elementary general frame, the width of elementary general frame is preferably 3-4mm, and the thickness of elementary general frame is preferably 1mm ~ 1.5mm, its object is to formation infrastructural frame.
3.3, built-up welding step in elementary general frame:
Built-up welding is carried out in each gore in elementary general frame, form multiple triangle built-up welding raised face, the thickness of described triangle built-up welding raised face is greater than the thickness of described elementary general frame, be greater than described wear extent simultaneously, in order to meet the needs of following process, the thickness of triangle built-up welding raised face is preferably 4mm ~ 5mm, and it is greater than the thickness in the memorial archway face after having repaired in step 3;
3.4, elementary general frame continues the step of built-up welding:
Elementary general frame continues built-up welding, until the consistency of thickness of thickness and described triangle built-up welding raised face, thus form secondary general frame, jointly form first time memorial archway repair surface (comprising first time upper memorial archway repair surface memorial archway repair surface lower to first time) by secondary general frame and triangle built-up welding raised face; Wherein elementary general frame continues welding rod material hardness that built-up welding in the step of built-up welding uses and be greater than the welding rod material hardness that on frame line, in built-up welding step and elementary general frame, in built-up welding step, built-up welding uses;
Particularly, framework place thickness being less than triangle built-up welding raised face proceeds built-up welding, form secondary upper frame, the thickness of secondary upper frame and the consistency of thickness of triangle built-up welding raised face, namely secondary upper frame and triangle built-up welding raised face form first time upper memorial archway repair surface; In this in like manner, first time lower memorial archway repair surface is formed;
Adopt the welding method of 3.1 to 3.4 can strengthen bond strength and the stability of welding material and mill housing well, improve hardness and the wearability of memorial archway and slide plate faying face simultaneously.
In 3.2 and 3.3 steps, the welding material of employing is common welding rod, and the model of common welding rod is preferably THJ422; Core diameter is 2.5/3.2/4.0mm; Type is structural steel; Welding rod length preferably 350 ~ 400mm; In order to improve integral solder intensity, built-up welding adopts the built-up welding of short arc low_input_power amount; Why selecting this kind of welding rod, is to make framework or triangle built-up welding raised face and memorial archway installed surface 4 binding ability reach best.In the welding process of carrying out 3.3 steps, be often soldered a triangle built-up welding raised face first do not clear up, and apply with stress knocking, if having weld defect after cleaning, need the machinery thoroughly rear repair welding of cleaning polishing.Postwelding horizon rule checks layer flat conditions, if find depressed phenomenon, needs welding rod to fill.
In 3.4 steps, the welding material adopted is extraordinary hardness welding rod, the model of extraordinary hardness welding rod is the shock-resistant hardfacing electrode of siderochrome molybdenum boron (i.e. Fe-Cr-Mo-B surfacing welding), the shock-resistant hardfacing electrode of siderochrome molybdenum boron is the surfacing welding of graphite mould, deposited metal is molybdenum chromium-boron alloy, surfacing hardness is HRC=60 ~ 65 °, matrix is Cr7Mo6B8 dispersion hardening Strengthening and Toughening austenite, deposited metal is cocrystallizing type or nearly cocrystallizing type alloy, make full use of high temperature resistant (650 DEG C can be reached) performance of the shock-resistant hardfacing electrode of siderochrome molybdenum boron, and good wearability, toughness, crack resistance, the shock-resistant hardfacing electrode of siderochrome molybdenum boron has higher shock resistance abrasive wear behavior simultaneously, the welding life-span of the shock-resistant hardfacing electrode of siderochrome molybdenum boron improves 6 ~ 8 times than the welding life-span of other materials.Weld by the shock-resistant hardfacing electrode of siderochrome molybdenum boron the built-up welding framework formed, wearability and the corrosion resistance of mill housing can be improve, extend the service life in memorial archway face 4, ensure that precision after machined.Welding adopts the built-up welding of short arc low_input_power amount, prevents pore from producing, and is often soldered and applies to thump with stress; The stability of the built-up welding framework that extraordinary hardened material is formed is the strongest.
3.5 first time memorial archway repair surface machining steps: machined is carried out to first time memorial archway repair surface and levelling, thus makes the mill housing face after machined reparation reach necessary requirement.
Particularly, if: first time memorial archway repair surface be perpendicular, then memorial archway repair surface is memorial archway plane first time, directly carries out following milling machine procedure of processing to memorial archway plane;
If: memorial archway repair surface does not form perpendicular for the first time, then first grind to obtain memorial archway plane to first time memorial archway repair surface, carry out following milling machine procedure of processing afterwards;
Particularly, if now:
On first time memorial archway repair surface and first time lower memorial archway repair surface be perpendicular, then first time upper memorial archway repair surface and first time lower memorial archway repair surface form memorial archway plane and lower memorial archway plane and directly carry out milling machine procedure of processing;
If: on first time, memorial archway repair surface does not form perpendicular with first time lower memorial archway repair surface, then first grind, be ground into a perpendicular, namely forms upper memorial archway plane; In like manner form lower memorial archway plane, wherein, grinding preferably adopts abrasion wheel grinding, can obtain the amount of grinding prepared so constantly, and the upper memorial archway plane more preferably formed after grinding and the thickness of lower memorial archway plane are 3.8mm ~ 4.0mm; Carry out following milling machine procedure of processing afterwards;
Milling machine procedure of processing:
With milling machine, online machining is carried out to memorial archway plane, align with the size and morpheme that make memorial archway plane and original int mill housing face, obtain second time memorial archway repair surface;
If: second time memorial archway repair surface is perpendicular, then second time memorial archway repair surface be the machining reaching necessary requirement repair after mill housing face;
If: second time memorial archway repair surface does not form perpendicular, then research second time memorial archway repair surface, to obtain perpendicular, thus obtains the mill housing face after the machining reparation reaching necessary requirement;
Particularly, machining is carried out to the upper memorial archway plane obtained and lower memorial archway plane milling machine, the size in upper memorial archway plane and lower memorial archway plane and former upper memorial archway face to be repaired and former lower memorial archway face and morpheme are alignd, namely obtains the upper memorial archway repair surface of second time and the lower memorial archway repair surface of second time; If now:
In second time, memorial archway repair surface and the lower memorial archway repair surface of second time are perpendicular, then on secondary, memorial archway repair surface forms the memorial archway face after the reparation of satisfactory machining with the lower memorial archway repair surface of second time, this mill housing face relative to frame body without the need to repair surface for, the height of protrusion or thickness are 3mm.
If: in second time, memorial archway repair surface and the lower memorial archway repair surface of second time do not form perpendicular, then research, to obtain perpendicular, thus the mill housing face obtained after the reparation of satisfactory machining, this mill housing face relative to frame body without the need to repair surface for, the height of protrusion or thickness are 3mm; In advanced study and training process, owing to adopting Fe-Cr-Mo-B surfacing welding when continuing built-up welding on elementary general frame, the hardness of the secondary general frame therefore obtained is higher than the hardness of triangle built-up welding raised face, therefore emphasis is needed to research (comprising the vertical ledge of secondary general frame and the edge of secondary general frame) secondary general frame, need in advanced study and training process constantly to measure reconditioning surplus, finally to ensure the dimensional tolerance in memorial archway face and form and position tolerance after the reparation that obtains.
In described milling machine procedure of processing, described milling machine carries out on-line machining in the following way: to be arranged on by described milling machine in base frock and milling machine described in centering; The integral hoisting base frock comprising milling machine and base frock is put on the slide rail of the side of described frame body; Again described integral hoisting base frock is pushed in described frame body, and make described integral hoisting base frock be placed on lower padding iron; Finally by described milling machine, machining is carried out to described memorial archway plane.
In described step 4, described drilling machine carries out online machined reparation to each screwed hole on described mill housing face in the following way: to be arranged on by described drilling machine in base frock and drilling machine described in centering; The integral hoisting base frock comprising described drilling machine and described base frock is put on the slide rail of the side of frame body; Again described integral hoisting base frock is pushed in described frame body, and make described integral hoisting base frock be placed on lower padding iron; Finally by described drilling machine, online machined reparation is carried out to each screwed hole on described mill housing face.
In milling machine procedure of processing, with the center line that the anchor point of the locating hole in round nut hole 9 and lower padding iron 10 is frame body 8, determine the form and position tolerance in memorial archway face 4 with this, the memorial archway face after final reparation can be made like this and never used or the position consistency in the most original int memorial archway face (memorial archway face when namely dispatching from the factory) 4.
A device for hot strip rolling mill memorial archway repaired by online milling machine, comprises base frock 1 and milling machine 6; As shown in Fig. 3, Fig. 4 and Fig. 5, base frock 1, base frock 1 is frame structure, the lower plane of base frock 1 is provided with two catchers 13, the lower plane of base frock 1 is also provided with the both sides that the first slide rail 15 and the second slide rail 16, first slide rail 15 and the second slide rail 16 lay respectively at two catchers 13; First slide rail 15, second slide rail 16 of base frock 1 coordinates with the slide rail 5 of backing roll installation place, and the catcher 13 of base frock 1 is connected with the roll change hydraulic cylinder of backing roll installation place; Milling machine 6, in the frock being placed on base frock 1 in plane 11.Wherein, in the diagram, and not shown first slide rail 15 and the second slide rail 16.
As shown in Figure 6, the process of online milling machine processing is:
Under conventional sense, backing roll is placed on slide rail 5, is pushed in frame body 8 or by release in frame body 8 by backing roll by roll change hydraulic cylinder; In order to realize the processing of online milling machine, first-selection needs backing roll to unload (pull-out hangs), and now slide rail 5 and roll change hydraulic cylinder also stay frame body 8 place;
Milling machine 6 is arranged on plane 11 in the frock of base frock 1 and centering milling machine 6 by bolt hole 14;
Integral hoisting base frock (namely comprising the general designation of base frock 1 and milling machine 6) is on the slide rail 5 of frame body 8 side, first slide rail 15, second slide rail 16 of base frock 1 matches with slide rail 5, and the catcher 13 of base frock 1 is connected with roll change hydraulic cylinder;
Then slide rail in frame body 8 is risen, and the slideway making the interior slide rail of frame body 8 formation concordant with slide rail 5 one complete, integral hoisting base frock pushes in frame body 8 by complete slideway by roll change hydraulic cylinder, then the interior slide rail of frame body 8 falls, and is placed on lower padding iron 10 by integral hoisting base frock;
Finally by milling machine 6, machining is carried out to upper memorial archway plane and lower memorial archway plane.
A kind of device of bolt hole of online reparation hot strip rolling mill memorial archway, comprise base frock 1, drilling machine 7 and locating template 2, base frock 1, base frock 1 is frame structure, the lower plane of base frock 1 is provided with two catchers 13, the lower plane of base frock 1 is also provided with the both sides that the first slide rail 15 and the second slide rail 16, first slide rail 15 and the second slide rail 16 lay respectively at two catchers 13; Backing roll, the first slide rail 15, second slide rail 16 of base frock 1 coordinates with the slide rail 5 of backing roll installation place, and the catcher 13 of base frock 1 is connected with the roll change hydraulic cylinder of backing roll installation place; Drilling machine 7, in the frock being placed on base frock 1 in plane 11; As shown in Figure 7, Figure 8, locating template 2 has four locating holes (i.e. machining hole) 21, the locating hole 21 on locating module 2 and installing hole 31 one_to_one corresponding of slide plate 3.
In step 4, as shown in Figure 9, locating template and drilling machine are repaired the process of inefficacy screwed hole online and are:
Under conventional sense, backing roll is placed on slide rail 5, is pushed in frame body 8 or by release in frame body 8 by backing roll by roll change hydraulic cylinder; In order to realize the processing of online milling machine, first-selection needs backing roll to unload (pull-out hangs), and now slide rail 5 and roll change hydraulic cylinder also stay frame body 8 place;
Drilling machine 7 is arranged on plane 11 in the frock of base frock 1 and centering drilling machine 7 by bolt hole 14;
Integral hoisting base frock (namely comprising the general designation of base frock 1 and drilling machine 7) is on the slide rail 5 of the side of frame body 8, first slide rail 15, second slide rail 16 of base frock 1 matches with slide rail 5, and the catcher 13 of base frock 1 is connected with roll change hydraulic cylinder;
Then slide rail in frame body 8 is risen, and the slideway making the interior slide rail of frame body 8 formation concordant with slide rail 5 one complete, integral hoisting base frock pushes in frame body 8 by complete slideway by roll change hydraulic cylinder, then the interior slide rail of frame body 8 falls, and integral hoisting base frock is placed on lower padding iron 10.
Illustrate that the method determining frame line in step 3 of the present invention can strengthen bond strength and the stability of welding material and mill housing better below by following examples, improve hardness and the wearability of memorial archway and slide plate faying face, thus increase memorial archway service life.
Embodiment 1 mill housing restorative procedure of the present invention
The step one of mill housing restorative procedure, step 2, step 3, step 4 and step 5 except determining frame line method are described above in this embodiment, this is no longer going to repeat them, is described in detail for the determination frame line method in step 3 now.
Framework is rule:
As shown in Figure 2, upper memorial archway face is marked a rectangle frame line, the corner of rectangle frame line is respectively a1, a2, a3, a4, a1, a2, a3, a4 occupy four angles in upper memorial archway face to be repaired successively simultaneously, b1, b2, b3, b4 occupy the mid point of a1a2 line, a2a3 line, a3a4 line, a4a1 line successively, and a1 and a3 connects line, and a2 and a4 connects line, b1, b2, b3, b4 appoint and all connect line between the two, and the whole lines marked form the first half frame line; Described the latter half frame line is formed according to the mode forming described the first half frame line.
Embodiment 2 mill housing restorative procedure of the present invention
Only framework scribble method is different from embodiment 1, and other are all identical with embodiment 1.
Framework is rule:
Upper memorial archway face is marked a rectangle frame line, and the corner of rectangle frame line occupies four angles in upper memorial archway face to be repaired successively, then rules rectangle frame line to be divided into 16 pieces of small rectangles, and the whole lines marked form the first half frame line; Described the latter half frame line is formed according to the mode forming described the first half frame line.
Mill housing after embodiment 1 and embodiment 2 being repaired comes into operation again, and under the condition of identical wear extent, embodiment 2 mill housing to be only 80% of embodiment 1 mill housing service life service life.
Analyze known, compared with prior art, advantage of the present invention and beneficial effect are:
One, online recovery technique provided by the invention can ensure the repairing quality of mill housing, avoid the deficiency of milling train necessary off-line length repair time simultaneously, shorten memorial archway and improve equipment use efficiency repair time, can repair within the production line overall ten day time of overhaul can be utilized.
Two, the simple in equipment such as milling machine, drilling machine of the present invention's employing, is convenient to processing and manufacturing, easy to use, is convenient to the control arranging and realize precision.
Three, the function that the present invention makes full use of milling machine and drilling machine can make the dimensional tolerance of memorial archway installed surface, bolt hole and form and position tolerance reach intrinsic instructions for use by detection, solves the technological difficulties that the measurement of memorial archway installed surface form and position tolerance is determined.
Four, in memorial archway welding, adopt the compound welding technology of two kinds of different welding material, not only increase bond strength and the stability of welding material and mill housing, turn improve hardness and the wearability of memorial archway and slide plate faying face.
Five, the online restorative procedure of memorial archway provided by the invention is simple to operate, efficiency is high, small investment, and instant effect, is beneficial to popularization, and cost efficiency recycles.
As known by the technical knowledge, the present invention can be realized by other the embodiment not departing from its Spirit Essence or essential feature.Therefore, above-mentioned disclosed embodiment, with regard to each side, all just illustrates, is not only.Within the scope of the present invention all or be all included in the invention being equal to the change in scope of the present invention.

Claims (10)

1. an online method of repairing hot strip rolling mill memorial archway, is characterized in that, comprise the following steps:
Step one, two pieces of slide plates up and down of damage equipped on mill housing face to be repaired to be removed, on-line cleaning is carried out to described mill housing face to be repaired and each screwed hole be positioned on described mill housing face to be repaired and removes the greasy dirt impurity on surface; Remove the fatigue layer on rolling memorial archway face to be repaired afterwards;
Step 2, choosing in frame body without the need to the surface of repairing as measuring the datum level of described mill housing surface wear amount to be repaired, measuring the wear extent in described mill housing face to be repaired afterwards according to described datum level;
Step 3, the wear extent recorded according to step 2, the mill housing face after the described mill housing face to be repaired of online reparation makes reparation reaches necessary requirement;
Step 4, locating template identical for structure that is upper with described or lower skateboard is adjacent to respectively the first half and the latter half in the mill housing face after repairing through step 3, carry out tuning on-line and define each screwed hole mill housing face needing repair, adopt drilling machine to carry out online machined reparation by the machining hole corresponding with each screwed hole on described mill housing face that described locating template is arranged to each screwed hole on described mill housing face afterwards, after repairing each screwed hole on described mill housing face, remove described locating template;
Step 5, the upper lower skateboard processed according to life size is installed on the relevant position in the mill housing face of repairing through step 4.
2. the method for online reparation hot strip rolling mill memorial archway according to claim 1, it is characterized in that, in described step 3, the method that the mill housing face after the described mill housing face to be repaired of described online reparation makes reparation reaches necessary requirement comprises the steps:
Framework scribe step:
The first half in described mill housing face to be repaired marks a rectangle frame line, the corner of described rectangle frame line is respectively a1, a2, a3, a4, a1, a2, a3, a4 occupy four angles of the first half in described mill housing face to be repaired successively simultaneously, b1, b2, b3, b4 are followed successively by the mid point of a1a2 line, a2a3 line, a3a4 line, a4a1 line, a1 and a3 connects line, a2 and a4 connects line, b1, b2, b3, b4 appoint and all connect line between the two, and the whole lines marked form the first half frame line; Described the latter half frame line is formed according to the mode forming described the first half frame line;
Built-up welding step on frame line:
In described the first half frame line and the enterprising windrow weldering of described the latter half frame line, form elementary general frame;
Built-up welding step in described elementary general frame:
Carry out built-up welding in each gore in described elementary general frame, form multiple triangle built-up welding raised face, the thickness of described triangle built-up welding raised face is greater than the thickness of described elementary general frame, is greater than described wear extent simultaneously;
Elementary general frame continues the step of built-up welding:
Described elementary general frame continues built-up welding, until the consistency of thickness of thickness and described triangle built-up welding raised face, thus forms secondary general frame, jointly form first time memorial archway repair surface by described secondary general frame and described triangle built-up welding raised face; Wherein said elementary general frame continues welding rod material hardness that built-up welding in the step of built-up welding uses and be greater than the welding rod material hardness that on described frame line, in built-up welding step and described elementary general frame, in built-up welding step, built-up welding uses;
First time memorial archway repair surface machining steps: machined is carried out to described first time memorial archway repair surface and levelling, thus makes the mill housing face after machined reparation reach necessary requirement.
3. the method for online reparation hot strip rolling mill memorial archway according to claim 2, is characterized in that:
The thickness of the elementary general frame that described frame line obtains in built-up welding step is 1mm ~ 1.5mm.
4. the method for online reparation hot strip rolling mill memorial archway according to claim 2, is characterized in that:
The thickness of the triangle built-up welding raised face obtained in built-up welding step in described elementary general frame is 4mm ~ 5mm.
5. the method for online reparation hot strip rolling mill memorial archway according to claim 2, is characterized in that:
On described frame line in built-up welding step and described elementary general frame in built-up welding step, the welding material that described built-up welding adopts is THJ422 welding rod; Described core diameter is 2.5/3.2/4.0mm; Type is structural steel; Described built-up welding adopts the built-up welding of short arc low_input_power amount; Described welding rod length preferably 350 ~ 400mm.
6. the method for online reparation hot strip rolling mill memorial archway according to claim 2, is characterized in that:
Elementary general frame continues in the step of built-up welding, the welding material that described built-up welding adopts is the shock-resistant hardfacing electrode of siderochrome molybdenum boron.
7. the method for online reparation hot strip rolling mill memorial archway according to claim 2, is characterized in that,
In the machining steps of described first time memorial archway repair surface,
If: described first time memorial archway repair surface be perpendicular, then memorial archway repair surface is memorial archway plane described first time, directly carries out following milling machine procedure of processing to described memorial archway plane;
If: described first time memorial archway repair surface do not form perpendicular, then first grind to obtain memorial archway plane to described first time memorial archway repair surface, carry out following milling machine procedure of processing afterwards;
Milling machine procedure of processing:
With milling machine, online machining is carried out to described memorial archway plane, align with the size and morpheme that make described memorial archway plane and original int mill housing face, obtain second time memorial archway repair surface;
If: described second time memorial archway repair surface is perpendicular, then described second time memorial archway repair surface be reach necessary requirement machining repair after mill housing face;
If: described second time memorial archway repair surface does not form perpendicular, then research described second time memorial archway repair surface, to obtain perpendicular, thus obtains the mill housing face after the machining reparation reaching necessary requirement.
8. the method for online reparation hot strip rolling mill memorial archway according to claim 7, is characterized in that:
In described milling machine procedure of processing, described milling machine carries out on-line machining in the following way:
Described milling machine to be arranged in base frock and milling machine described in centering;
The integral hoisting base frock comprising milling machine and base frock is put on the slide rail of the side of described frame body;
Again described integral hoisting base frock is pushed in described frame body, and make described integral hoisting base frock be placed on lower padding iron;
Finally by described milling machine, machining is carried out to described memorial archway plane.
9. the method for online reparation hot strip rolling mill memorial archway according to claim 1, is characterized in that:
In described step 4, described drilling machine carries out online machined reparation to each screwed hole on described mill housing face in the following way:
Described drilling machine to be arranged in base frock and drilling machine described in centering;
The integral hoisting base frock comprising described drilling machine and described base frock is put on the slide rail of the side of frame body;
Again described integral hoisting base frock is pushed in described frame body, and make described integral hoisting base frock be placed on lower padding iron;
Finally by described drilling machine, online machined reparation is carried out to each screwed hole on described mill housing face.
10. the method for online reparation hot strip rolling mill memorial archway according to claim 7, is characterized in that:
In the machining steps of described first time memorial archway repair surface, described grinding adopts abrasion wheel grinding.
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