CN101422850B - Flat-head cap build-up welding repair method - Google Patents
Flat-head cap build-up welding repair method Download PDFInfo
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- CN101422850B CN101422850B CN2007100941912A CN200710094191A CN101422850B CN 101422850 B CN101422850 B CN 101422850B CN 2007100941912 A CN2007100941912 A CN 2007100941912A CN 200710094191 A CN200710094191 A CN 200710094191A CN 101422850 B CN101422850 B CN 101422850B
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- welding
- homalocephalus
- flat head
- head sleeve
- repairing
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Abstract
The invention relates to a method for repairing a connecting piece between a roller and a main shaft, in particular to a method for repairing a flat head sleeve by resurfacing welding, and the method mainly solves the technical problems of the traditional flat head sleeve repairing method that the wear amount of an inner wall can not be controlled effectively and the flat head sleeve is difficult to be assembled and disassembled, and the like. The method for repairing the flat head sleeve by resurfacing welding comprises the following steps: a. a molding board is manufactured; b. a fatigue layer of a working surface on the inner wall of the flat head sleeve is removed; c. the flat head sleeve is hung in a heating furnace for preheating for 3 hours and insulation for 6 to 8 hours at the temperature of 250 DEG C to 300 DEG C; d. after being taken out of the furnace, the flat head sleeve is enwrapped by fire resisting and insulating material, and only the position waiting to be repaired is reserved; e. the working surface on the inner wall of the flat head sleeve is repaired by the resurfacing welding of structure steel welding rods which contain chromium, and in the repairing process of the resurfacing welding, the size is checked by the manufactured molding board at any moment; f. after the resurfacing welding begins, continuous operation is carried out until the resurfacing welding and repairing size meets the demand; and g. after the resurfacing welding is finished, tempering treatment is carried out at once, and the tempering temperature is about 720 DEG C, insulation is carried out for 8 hours, and then the flat head sleeve is taken out of the furnace after being slowly cooled to room temperature along with the furnace.
Description
Technical field:
The present invention relates to the restorative procedure of roll and main shaft connector, particularly a kind of flat-head cap build-up welding repair method.
Background technology:
With reference to Fig. 1 because homalocephalus cover 1 is the connector between roll 2 and the main shaft, the characteristics of its work be start braking frequent with repeatedly, spike, impact, obstruction and often receive suddenly the effect that (unloading) carries that adds.This by many outer unsettled operation process that causes that disturbs, especially outstanding to the influence of homalocephalus cover in the mechanical main transmission, cause the homalocephalus cover short service life, failure of removal is many.Once adopted gas welding or gas to protect traditional welding repair modes and traditional processing method of polishing such as weldering in the past, the homalocephalus cover after the reparation only recovers its size, and can't reach re-set target service life.So in the process of using, the wear extent of homalocephalus cover inwall can not get effective control, it is high to change frequency, excesssive gap between roll shaft and the homalocephalus cover; When homalocephalus is enclosed within dismounting and installation in addition, more loaded down with trivial details, waste time and energy the significant wastage manpower and materials.
Summary of the invention:
The present invention provides a kind of flat-head cap build-up welding repair method.The inner wall abrasion amount that mainly solves the existence of traditional homalocephalus cover restorative procedure can't effectively be controlled; Homalocephalus cover dismounting difficulty, traditional welding restorative procedures such as gas welding or gas guarantor weldering can not satisfy instructions for use, and repair member is low service life; Problems such as the replacing frequency is high, and labour intensity is big.
Technical scheme of the present invention may further comprise the steps:
1, inspection homalocephalus cover inwall face condition on horizontal table, is confirmed homalocephalus cover center reference point, makes template;
2, remove the fatigue layer of homalocephalus cover inwall working face, thoroughly remove through dye penetrant inspection affirmation crackle;
3, for guaranteeing the welding quality of homalocephalus cover in the repair process, improve the effect of repairing, work out the preheating scheme: the homalocephalus cover was hung in the heating furnace preheating 3 hours, 250 ℃～300 ℃ insulations 6～8 hours;
4, the homalocephalus after coming out of the stove is applied mechanically the flame-proof thermal insulation material parcel, only reserves position to be repaiied;
5, repair homalocephalus cover inwall working face with the structural steel electrode built-up welding that contains chromium, in the process that built-up welding is repaired, generally the built-up welding non-uniform phenomenon can occur; Cause a side size many, a side size is few, sometimes even occur to repair size situation not in place; To this situation, specially make template and be used to check size, according to set the check benchmark; At any time check with template, thereby the equal flatness of even overlay cladding of the circumference that better guarantees to repair improves the quality and the efficient of repairing;
What 6, other repair modes were considered in welding process is fewer, thereby causes that the quality of overlay cladding can not get effective assurance after the built-up welding.For guaranteeing control to weld deposit process,, weld deposit process works continuously after beginning, and repair size until built-up welding and reach requirement;
7, after built-up welding finishes, carry out temper immediately, temperature is incubated 8 hours about 720 ℃, come out of the stove after furnace cooling to the room temperature.
Processing technology: because homalocephalus cover inwall is not a regular circle or square, select suitable technological method for processing to be necessary, at first, be worked into size basically through slotting machine or milling machine processing homalocephalus cover inwall; Sanding machine reconditioning is then checked at any time, is checked with template, guarantees that the arc transition of size, flatness and the corner of homalocephalus cover working face satisfies instructions for use.
After the processing of homalocephalus cover inwall working face meets the demands; Consider homalocephalus cover real work characteristics, make steam vent at homalocephalus cover tail end, according to the structure of homalocephalus cover and the situation of use; Requirement according to size; Overlap inboard escape place at homalocephalus and make a call to and discharge homalocephalus cover inner chamber gas when 1～4 hole is used for changing, the pressure when reducing homalocephalus cover inner chamber and installing, easy disassembly.
The invention has the beneficial effects as follows: through to the concrete analysis of homalocephalus cover material and for the tracking of on-the-spot industrial and mineral condition, select the welding material and the Technology for Heating Processing that match for use, improve the life-span of its use; Through analysis, increase exhaust outlet in position simultaneously, can guarantee that online use is unaffected, improve the efficient of changing again the homalocephalus nested structure.The present invention repairs the homalocephalus cover, can improve the service life of homalocephalus cover, is convenient to simultaneously change; Reduce labour intensity; The present invention guarantees that the material that the homalocephalus cover is repaired satisfies existing working condition, reaches and improves service life in resizing; Reduce and change frequency, reduce the purpose of labour intensity.According to actual applying working condition condition,, select suitable welding material and Technology for Heating Processing for use in conjunction with the characteristics of homalocephalus cover matrix material and coupling roll shaft; In order to guarantee the convenience of field replacement, anatomize the structure that the homalocephalus cover is connected with roll shaft simultaneously, work out the processing technology of sleeve and increase steam vent with for convenience detach, plan for installation.
Description of drawings:
Fig. 1 is homalocephalus cover operation principle sketch map of the present invention
Fig. 2 is a homalocephalus nested structure sketch map of the present invention
Among the figure: 1-homalocephalus cover, 2-roll, 3-homalocephalus cover repair layer, 4-escape, 5-steam vent.
The specific embodiment: according to the concrete size of Fig. 2, designing a template, is datum mark with homalocephalus cover center, guarantees dimensional requirement up and down, adopts the method for line cutting accurately to make, and the template material is optional with A3 plate or stainless steel, requires to have certain intensity.
One, built-up welding reparation:
1, the inspection homalocephalus overlaps 1 inwall face condition, on horizontal table, confirms homalocephalus cover center reference point, makes template;
2, remove the fatigue layer of homalocephalus cover inwall working face, thoroughly remove through dye penetrant inspection affirmation crackle;
3, the homalocephalus cover was hung in the heating furnace preheating 3 hours, insulation was 250 ℃～300 ℃ insulations 6～8 hours;
4, the homalocephalus cover after coming out of the stove is placed on on the alumina-silicate refractory fibre blanket, and overlaps tight parcel to homalocephalus, only reserves position to be repaiied;
5, repair homalocephalus with structural steel electrode (E10015-G, the Shanghai Welding Equipment Co., Ltd) built-up welding that contains chromium and overlap the inwall working face, in the process that built-up welding is repaired, check size with the template of making at any time, the circumference that assurance is repaired is the flatness of even overlay cladding all;
6, work continuously after weld deposit process begins, repair size until built-up welding and reach requirement, form homalocephalus cover repair layer 3;
7, after built-up welding finishes, carry out temper immediately, temperature is incubated 8 hours about 720 ℃, come out of the stove after furnace cooling to the room temperature.
Two, processing technology: because homalocephalus cover inwall is not a regular circle or square, select suitable technological method for processing to be necessary, at first, be worked into size basically through slotting machine or milling machine processing homalocephalus cover inwall; Sanding machine polishing is then checked at any time, is checked with template, guarantees that the arc transition of size, flatness and the corner of homalocephalus cover working face satisfies instructions for use.
Three, after the processing of homalocephalus cover inwall working face meets the demands, consider to have added that sealing such as butter causes exhaust not smooth because the homalocephalus cover is connected closelyr with roller shaft; Endoporus air pressure is bigger, and the installing/dismounting difficulty is considered to make steam vent in homalocephalus cover appropriate location, rear end; According to the overall structure of homalocephalus cover and the situation of online use; The position suitable at the tail end of homalocephalus cover makes steam vent, and the distribution of steam vent and concrete geomery decide according to the size of homalocephalus cover and situation about using, and overlaps inboard escape 4 places at homalocephalus and makes a call to 1～4 steam vent 5 and be used for when changing, discharging homalocephalus and overlap inner chamber gas; Pressure when reducing the installation of homalocephalus cover inner chamber, easy disassembly.
Claims (2)
1. flat-head cap build-up welding repair method is characterized in that: may further comprise the steps:
A, inspection homalocephalus cover inwall face condition on horizontal table, are confirmed homalocephalus cover center reference point, make template;
The fatigue layer of b, removal homalocephalus cover inwall working face is thoroughly removed through dye penetrant inspection affirmation crackle;
C, the homalocephalus cover was hung in the heating furnace preheating 3 hours, 250 ℃～300 ℃ insulations 6～8 hours;
D, the homalocephalus after coming out of the stove are applied mechanically the flame-proof thermal insulation material parcel, only reserve position to be repaiied;
E, repair homalocephalus cover inwall working face with the structural steel electrode built-up welding that contains chromium, in the process that built-up welding is repaired, check size with the template of making at any time, the circumference that guarantees to repair is the flatness of even overlay cladding all;
Work continuously after f, weld deposit process begin, repair size until built-up welding and reach requirement;
After g, built-up welding finish, carry out temper immediately, temperature is incubated 8 hours at 720 ℃, comes out of the stove after furnace cooling to the room temperature, and the homalocephalus cover of acquisition at first through slotting machine or milling machine processing homalocephalus cover inwall, is worked into size basically; Sanding machine is polished then, checks, checks the arc transition of the size, flatness and the corner that obtain satisfactory working face at any time with template.
2. a kind of flat-head cap build-up welding repair method according to claim 1 is characterized in that: overlap inboard escape place at homalocephalus and make a call to 1～4 steam vent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100941912A CN101422850B (en) | 2007-11-01 | 2007-11-01 | Flat-head cap build-up welding repair method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100941912A CN101422850B (en) | 2007-11-01 | 2007-11-01 | Flat-head cap build-up welding repair method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101422850A CN101422850A (en) | 2009-05-06 |
| CN101422850B true CN101422850B (en) | 2012-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2007100941912A Expired - Fee Related CN101422850B (en) | 2007-11-01 | 2007-11-01 | Flat-head cap build-up welding repair method |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102335805B (en) * | 2010-07-26 | 2013-04-24 | 宝山钢铁股份有限公司 | Method for repairing flat-head cap without liner plate |
| CN102335808B (en) * | 2010-07-27 | 2013-09-04 | 宝山钢铁股份有限公司 | Method for finishing flat potential surfaces of flat-head cap of roll |
| CN102873631B (en) * | 2012-10-23 | 2014-10-22 | 中国第二重型机械集团（德阳）万信工程设备有限责任公司 | Deformation eliminating method of welded ultrahigh pressure pipe |
| CN105583543A (en) * | 2016-02-23 | 2016-05-18 | 鞍钢实业集团冶金机械有限公司 | Repairing method for R roots of gear spindle sleeve |
| CN108115351A (en) * | 2016-11-30 | 2018-06-05 | 宝山钢铁股份有限公司 | A kind of flat head sleeve repair method of bores |
| CN106925943A (en) * | 2017-04-06 | 2017-07-07 | 中交天津航道局有限公司 | A kind of restorative procedure of rich chromium cast iron material dredging pump impeller |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3513090A1 (en) * | 1984-04-19 | 1985-10-31 | Fa. August Thiele, 5860 Iserlohn | Method of repairing the worn ends of scrapers and end wearing piece for carrying out the method |
| US4852236A (en) * | 1988-07-11 | 1989-08-01 | Emery Corporation | Method of repairing a worn wobbler housing for a constant-speed drive |
| CN1196990A (en) * | 1997-04-14 | 1998-10-28 | 通用电气公司 | Welf repair process and article repaired thereby |
| US6276056B1 (en) * | 1997-12-19 | 2001-08-21 | Ford Global Technologies, Inc. | Method for modifying a torque converter hub |
-
2007
- 2007-11-01 CN CN2007100941912A patent/CN101422850B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3513090A1 (en) * | 1984-04-19 | 1985-10-31 | Fa. August Thiele, 5860 Iserlohn | Method of repairing the worn ends of scrapers and end wearing piece for carrying out the method |
| US4852236A (en) * | 1988-07-11 | 1989-08-01 | Emery Corporation | Method of repairing a worn wobbler housing for a constant-speed drive |
| CN1196990A (en) * | 1997-04-14 | 1998-10-28 | 通用电气公司 | Welf repair process and article repaired thereby |
| US6276056B1 (en) * | 1997-12-19 | 2001-08-21 | Ford Global Technologies, Inc. | Method for modifying a torque converter hub |
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| CN101422850A (en) | 2009-05-06 |
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Application publication date: 20090506 Assignee: Shanghai Meishan Technology Development Co., Ltd. Assignor: Shanghai Meishan Co., Ltd., Baogang Group Contract record no.: 2014320000518 Denomination of invention: Flat-head cap build-up welding repair method Granted publication date: 20120111 License type: Exclusive License Record date: 20140619 |
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