CN102653044A - Method for manufacturing coal supporting bottom plate of coal charging vehicle of stamping coke oven - Google Patents
Method for manufacturing coal supporting bottom plate of coal charging vehicle of stamping coke oven Download PDFInfo
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- CN102653044A CN102653044A CN2011100493202A CN201110049320A CN102653044A CN 102653044 A CN102653044 A CN 102653044A CN 2011100493202 A CN2011100493202 A CN 2011100493202A CN 201110049320 A CN201110049320 A CN 201110049320A CN 102653044 A CN102653044 A CN 102653044A
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Abstract
The invention discloses a method for manufacturing a coal supporting bottom plate of a coal charging vehicle of a stamping coke oven. The coefficient of linear expansion of a steel plate is obtained through measuring the temperature of an area within 100 mm of the periphery of a cutting line of the steel plate, the amount of linear expansion of the steel plate is calculated, the length of each continuous cutting of a plate material is 500 mm, and the deformation of the steel plate is guaranteed to be in a permissible range; a main plate is blanked into two blocks, a guide plate is blanked into six blocks, paired weld seams of each cut steel plate adopt bilateral V-shaped cross openings and are symmetrically welded, and a next layer of welding meat is welded after one layer of welding meat is naturally cooled; a flame straightening method and a pressure straightening method are adopted to straighten straightness and flatness after the main plate and the guide plate are spliced, and a radial drill is adopted to drill according to process requirements after the main plate and the guide plate are integrated through spot welding; and the length of rivets is determined according to process parameters, the manual riveting is adopted, and an angular polishing machine and a polishing sheet are adopted to grind so as to eliminate outcropped rivets. By utilizing the method disclosed by the invention, the in-situ processing of the coal supporting bottom plate is realized, the manufactured coal supporting bottom plate meets the process requirements, the manufacture cycle is remarkably shortened, and the manufacture cost is reduced.
Description
Technical field
The present invention relates to a kind of preparation method of tamping coke oven charging car holder coal seam floor.
Background technology
The holder coal seam floor is the important component part of tamping coke oven charging car coaling gear, and its function is the briquette carbonization chamber of making a gift to someone, for next stamp charging is got ready.The quality of briquette of carbonization chamber of once packing into is about 42.5t, and the carbonization chamber temperature inside is coaling and accomplished once-through operation and need about 6min about 1050 ℃, and work condition environment is extremely abominable.Holder coal seam floor main form of invalidation is the conquassation, abrasive wear of working surface and the fractureing of alternating thermal stress state bottom guide, and generally speaking, the holder coal seam floor uses just to be changed in 8 to 10 months.Holder coal seam floor gross weight 7.5t, the holder coal seam floor of newly purchasing a finished product needs 190,000 yuan.
As shown in Figure 1, the holder coal seam floor comprises mainboard 1, guide plate 2 and Karma seat 3, and Karma seat 3 is located at the bottom surface of mainboard 1 one ends, and guide plate 2 is positioned at mainboard 1 bottom surface and connects through some rivets 4; As shown in Figure 2, the entire length of mainboard 1 is 21400mm, and width is 460mm, and thickness is 60 ㎜, has some rivet holes 11 by technological requirement on the mainboard; As shown in Figure 3; Guide plate 2 thickness are 40mm; Be divided into 5000X460 end plate 22,6300X460 intermediate plate 23 each one and connect end plate 22 and intermediate plate 23 two 8200X100 connecting plates 24, be located at two blocks of 1900X100 side plates 25 of intermediate plate 23 1 sides, have some rivet holes 21 by technological requirement on the same guide plate 2; The manufacturing materials of holder coal seam floor is the Q345B steel plate; Receive the restriction of production scene condition; Steel plate cutting can only adopt semi auto cutting machine to carry out, and sheet material very easily produces distortion later at gas cutting high temperature, prevents that therefore sheet deformation from being the difficult point that the holder coal seam floor is made.Ask coal seam floor to be divided into after several part blankings in addition, be combined into after the monoblock, all can cause holding in the palm the coal seam floor poor flatness owing to heat energy produces distortion through playing groove welding.
Summary of the invention
Technical problem to be solved by this invention provides a kind of preparation method of tamping coke oven charging car holder coal seam floor; This method has realized the field machining of holder coal seam floor; The complete according with process requirements of holder coal seam floor of making has significantly shortened fabrication cycle, has reduced cost of manufacture.
For solving the problems of the technologies described above; The preparation method of tamping coke oven charging car holder coal seam floor of the present invention; Said holder coal seam floor comprises mainboard and the guide plate of being processed by the Q345B steel plate, and guide plate is positioned at the mainboard bottom surface and is connected with mainboard through some rivets, and guide plate comprises end plate, intermediate plate, two connecting plates and two blocks of side plates; Two connecting plates connect end plate and intermediate plate; Two blocks of side plates are located at intermediate plate one side, have some rivet holes on mainboard and the guide plate, it is characterized in that this preparation method comprises the steps:
The coefficient of expansion of step 1, definite holder coal seam floor; Temperature when adopting infrared thermometer accurately to measure the flame cutting in the line of cut periphery 100mm; Drawing mean temperature is 700 ℃, the inquiry mechanical design handbook, and the value of temperature linear expansion coefficient α 1 of Q345B steel plate in the time of 700 ℃ is 14.7 * 10
-6/ ℃;
The line swell increment of step 2, calculating Q345B steel plate,
ΔL=L0×α1×C
In the formula: Δ L is the line swell increment after steel plate is out of shape through cutting, be controlled in 1%,
L0 is the initial length of steel plate,
C is a cutting temperature,
Line swell increment after the part sheet material of each piece blanking requires it through the cutting distortion is no more than 5mm, and through calculating, drawing L0 is 486mm, and rounding is 500mm, and promptly the each length of cutting continuously of sheet material is 500mm, can guarantee that steel plate deformed is in the scope of permission;
The splicing of step 5, mainboard and each cutting steel plate of guide plate; Adopt the splicing groove of flame-cutting preparation group butt welded seam; The splicing groove adopts bilateral V-arrangement groove, and the groove for preparing is used the control gauge check, goes after each cutting steel plate group butt welded seam of mainboard and guide plate simultaneously welds and finishes again and welds another side; A group butt welded seam is symmetrically welded during welding, and one deck weldering meat cools off back welding lower floor weldering meat naturally;
Correct after step 6, mainboard and the guide plate splicing, adopt flame correction method to take the method for triangle or the heating of " 1 " font that the linearity of mainboard and guide plate is proofreaied and correct, eliminate arc unrestrained with the limit; Heating and temperature control is at 500-600 ℃, and employing infrared thermometer measurement heating-up temperature, adopts the pressure orthosis that the flatness of mainboard and guide plate is proofreaied and correct; Mainboard or guide plate are positioned on the moulding bed, and mainboard or guide plate plane are drawn and are put horizontal wire, find out peak; Correction is to the other end in proper order from an end of steel plate school successively; Correction gate set up place on the peak, proofread and correct and between door frame and the peak hydraulic jack is set steel plate is corrected to level, after the rectification; The linearity of mainboard or four vertical ribs of guide plate is not more than 5mm, and flatness is not more than 2mm;
The contraposition boring of step 7, mainboard and guide plate rivet hole lies against guide plate on the moulding bed, lies against mainboard above the guide plate again and makes it and fit; Inspection binding face gap should be less than 2mm; Otherwise adopt the method for gagging to correct, after the rectification, take the method for spot welding that mainboard and guide plate are fixed as integral body; Dislocation occurs during in order to avoid hole, adopt radial drill to hole by technological requirement;
Rivet length is confirmed in the riveted joint of step 8, mainboard and guide plate,
In the formula: l is a rivet length (unit: mm)
δ is connected two plate gross thickness (units: mm)
d
0Be rivet hole diameter (unit: mm)
D is a rivet diameter (unit: mm)
D is a rivet counter bore diameter (unit: mm)
H is a rivet counter sink height
C is empirical value and according to the form below value
The rivet material is Q235B, and the riveted joint mode is a manual rivet, and its heating-up temperature is 1000～1100 ℃; Whole riveting temperature is 450～600 ℃, and infrared thermometer is adopted in temperature control, and holder-on should be in alignment with the ailhead center; The extension of nail bar is upset into the ailhead shape; Ailhead and surface of the work are close sticking, and the nail bar will be full of the nail hole, and the rivet blackening promptly stops riveted joint;
Step 9, mainboard and guide plate working face surface roughness are handled, the rivet point of emergence that adopts electric angle grinder and polished section polishing elimination mainboard and guide plate riveted joint back to occur, and mainboard and guide plate working face surface roughness are not higher than 12.5 μ m.
Because the preparation method of tamping coke oven charging car holder coal seam floor of the present invention has adopted technique scheme, promptly through measuring the temperature in the line of cut periphery 100mm, the value that draws temperature linear expansion coefficient α 1 of Q345B steel plate in the time of 700 ° is 14.7 * 10
-6/ ℃; Calculate the line swell increment of Q345B steel plate, drawing the each length of cutting continuously of sheet material is 500mm, can guarantee that steel plate deformed is in the scope of permission; Mainboard is divided into two blankings, and guide plate is divided into six blankings, and the group butt welded seam of each cutting steel plate adopts bilateral V-arrangement groove and symmetry welding, and one deck weldering meat cools off back welding lower floor weldering meat naturally; Mainboard and guide plate splicing back adopt flame correction method and pressure orthosis to correct flatness, and after the rectification, the linearity of mainboard and four vertical ribs of guide plate is not more than 5mm, and flatness is not more than 2mm; After mainboard and guide plate spot welding are integral body, adopt radial drill by technological requirement boring; Confirm rivet length according to technological parameter; Manual rivet is adopted in riveted joint, and its heating-up temperature is 1000～1100 ℃, and whole riveting temperature is 450～600 ℃; And adopt electric angle grinder and polished section to polish and eliminate the rivet of appearing, mainboard and guide plate working face surface roughness are not higher than 12.5 μ m.This method has realized the field machining of holder coal seam floor, and the complete according with process requirements of holder coal seam floor of making has significantly shortened fabrication cycle, has reduced cost of manufacture.
Description of drawings
The present invention is described in further detail below in conjunction with accompanying drawing and embodiment:
Fig. 1 is the structural representation of holder coal seam floor,
Fig. 2 is the structural representation of mainboard in the holder coal seam floor,
Fig. 3 is the structural representation of holder coal seam floor centering guide,
The sketch map that Fig. 4 corrects for mainboard or guide plate pressure in the holder coal seam floor,
Fig. 5 is the sketch map of holder coal seam floor mainboard and guide plate riveted joint.
The specific embodiment
The preparation method of tamping coke oven charging car holder coal seam floor of the present invention; Said holder coal seam floor comprises mainboard and the guide plate of being processed by the Q345B steel plate, and guide plate is positioned at the mainboard bottom surface and is connected with mainboard through some rivets, and guide plate comprises end plate, intermediate plate, two connecting plates and two blocks of side plates; Two connecting plates connect end plate and intermediate plate; Two blocks of side plates are located at intermediate plate one side, have some rivet holes on mainboard and the guide plate, it is characterized in that this preparation method comprises the steps:
Because sheet material very easily produces distortion in the process of blanking, need to adopt reliable method blanking.Among the blanking process, should therefore need accurately to confirm the thermal expansion amount of holder coal seam floor with its Control Thermal Deformation within the range of permission, in order to avoid be out of shape excessive bad correction, cause material failure after perhaps proofreading and correct, therefore,
The coefficient of expansion of step 1, at first definite holder coal seam floor; Temperature when adopting infrared thermometer accurately to measure the flame cutting in the line of cut periphery 100mm; Drawing mean temperature is 700 ℃; The inquiry mechanical design handbook, the value of temperature linear expansion coefficient α 1 of Q345B steel plate in the time of 700 ℃ is 14.7 * 10
-6/ ℃;
The line swell increment of step 2, calculating Q345B steel plate,
ΔL=L0×α1×C
In the formula: Δ L is the line swell increment after steel plate is out of shape through cutting, be controlled in 1%,
L0 is the initial length of steel plate,
C is a cutting temperature,
Line swell increment after the part sheet material of each piece blanking requires it through the cutting distortion is no more than 5mm, and through calculating, drawing L0 is 486mm, and rounding is 500mm, and promptly the each length of cutting continuously of sheet material is 500mm, can guarantee that steel plate deformed is in the scope of permission.
Because the entire length of mainboard is 21400mm, width is 460mm, on market, can't purchase the steel plate of length 21.4m, and therefore mainboard is made into two carries out welding,
The splicing of step 5, mainboard and each cutting steel plate of guide plate, mainboard is spliced by the welding of two block plates, and guide plate is spliced by the welding of six block plates; Adopt the splicing groove of flame-cutting preparation group butt welded seam; The splicing groove adopts bilateral V-arrangement groove, and the groove for preparing is used the control gauge check, goes after each cutting steel plate group butt welded seam of mainboard and guide plate simultaneously welds and finishes again and welds another side; A group butt welded seam is symmetrically welded during welding, and one deck weldering meat cools off back welding lower floor weldering meat naturally;
Correct step 6, mainboard and guide plate splicing back; Adopt flame correction method to take the method for triangle or the heating of " 1 " font that the linearity of mainboard and guide plate is proofreaied and correct; Eliminate arc and the limit wave, heating and temperature control is at 500-600 ℃, and the employing infrared thermometer is measured heating-up temperature; The triangle heating means are carried out the delta-shaped region heating for the boss at steel plate, and " 1 " font heating means are carried out the heating of " 1 " font zone for the boss at steel plate; As shown in Figure 4, adopt the pressure orthosis that the flatness of mainboard 1 and guide plate is proofreaied and correct, mainboard 1 or guide plate are positioned on the moulding bed 5; Mainboard 1 or guide plate plane are drawn and are put horizontal wire; Find out peak, correction is that the end from steel plate is arranged at correction gate frame 6 on the peak to the other end in the school successively in proper order; Proofread and correct and hydraulic jack 7 to be set between door frame 6 and the peak steel plate is corrected to level; After the rectification, the linearity of mainboard or four vertical ribs of guide plate is not more than 5mm, and flatness is not more than 2mm;
The contraposition boring of step 7, mainboard and guide plate rivet hole lies against guide plate on the moulding bed, lies against mainboard above the guide plate again and makes it and fit; Inspection binding face gap should be less than 2mm; Otherwise adopt the method for gagging to correct, after the rectification, take the method for spot welding that mainboard and guide plate are fixed as integral body; Dislocation occurs during in order to avoid hole, adopt radial drill to hole by technological requirement;
In the formula: l is a rivet length (unit: mm)
δ is connected two plate gross thickness (units: mm)
d
0Be rivet hole diameter (unit: mm)
D is a rivet diameter (unit: mm)
D is a rivet counter bore diameter (unit: mm)
H is a rivet counter sink height
C is empirical value and according to the form below value
By technological requirement, the gross thickness of mainboard and guide plate is 100mm, and the rivet aperture is respectively 21.5mm, 25.5mm and 32mm; The rivet length that is calculated mainboard and guide plate riveted joint by above-mentioned formula is two kinds: 129.7mm (rounding is 130 ㎜, diameter of phi 25mm) and 140mm (diameter of phi 20mm), and the rivet material is Q235B; The riveted joint mode is a manual rivet; Its heating-up temperature is 1000～1100 ℃, and whole riveting temperature is 450～600 ℃, and infrared thermometer is adopted in temperature control; Before the rivet heating, can adopt on-the-spot waste oil bucket to rise stove, add coke, treat to use air blast combustion-supporting after the coke burning, heat among rivet is placed stove, guarantee the rivet homogeneous heating, when treating that the rivet temperature reaches requirement, rivet again.The rivet heating is wanted evenly, and overheated and underheated rivet can not use; Burn man-to-man with connect the man-to-man close fit of wanting, proper; Should knock out oxide skin and the rapid drift bolt on the rivet immediately after connecing nail; It is fast that holder-on top nail is wanted, and holder-on should be in alignment with the ailhead center, and the extension of nail bar is upset into the ailhead shape, and ailhead and surface of the work are close sticking, and the nail bar will be full of the nail hole, and the rivet blackening promptly stops to rivet;
Step 9, mainboard and guide plate working face surface roughness are handled, the rivet point of emergence that adopts electric angle grinder and polished section polishing elimination mainboard and guide plate riveted joint back to occur, and mainboard and guide plate working face surface roughness are not higher than 12.5 μ m.
If the working face roughness of guide plate does not reach requirement, in the process of coalingging, will cause holding in the palm the bottom lining plate and the lining plate rapid wear of coal seam floor, it is excessive to cause it in the process of coalingging, to shake, the service life of the coal seam floor of influence holder simultaneously.Measure the method for inspection and can adopt the rough surface detecting instrument to measure, perhaps contrast roughness sample plate and detect, perhaps selecting an on-the-spot surface roughness is the part comparison and detection of 12.5 μ m.The surface roughness of holder coal seam floor reaches after the requirement, can adopt antirust oil that its surface is smeared, and prevents to get rusty, and will ask coal seam floor to cover with colour bar cloth again, prevents to expose to the sun and rain.
This method takes segmentation blanking, composing rationally to prevent distortion.The part sheet material of each piece blanking requires its deflection to be no more than 5mm, through the computational methods of science, calculates that to be divided into one section blanking of 500mm be the best approach, takes reasonably to arrange plate and cutting sequence simultaneously.See that from manufacture craft this method reduces the work load (do not need oversize correction time) of timing; As not adopting the method, sheet material will produce above the distortion more than the 20mm, some produces very big arcuate deformation, will bring great inconvenience to correcting process, even monoblock sheet material is scrapped.Facts have proved that this method is simple to operate, can reduce the work load of operating personnel's rectification plate shape greatly, respond well, after the blanking of every sheet material process this method, its straight line deflection is no more than 5 ㎜.
The fabrication and processing of general holder coal seam floor adopts large-scale wire electrode cutting machine bed in production plant's blanking, and this method combines the actual conditions of coking production scene, adopts more simple semi auto cutting machine blanking, has realized the field machining of holder coal seam floor; Effectively shortened fabrication cycle, in general, production plant's fabrication cycle is 2 months, and is merely for 2 weeks in the actual fabrication cycle of coking production scene, and the process-cycle shortens greatly; Made things convenient for the transportation and the lifting of holder coal seam floor simultaneously, the holder coal seam floor length 21.4m in that production plant is made into finished product needs the lengthening trailer transportation; Take to prevent to transport the measure of distortion; The scene needs large-scale crane cooperation to unload, and makes the holder coal seam floor at the scene, only need generally transport the trailer of material; Need not to take to prevent to transport the measure of distortion, practiced thrift large-scale crane machine-team.Especially this method has obtained good economic benefit, and the cost of holder coal seam floor self manufacture is labour cost, fee of material, instrument and mechanical one-shift, and totle drilling cost is about 120,000 yuan, and the market purchasing valency is 190,000 yuan, and therefore making each piece holder coal seam floor saves 70,000 yuan approximately.
Claims (1)
1. the preparation method of a tamping coke oven charging car holder coal seam floor; Said holder coal seam floor comprises mainboard and the guide plate of being processed by the Q345B steel plate, and guide plate is positioned at the mainboard bottom surface and is connected with mainboard through some rivets, and guide plate comprises end plate, intermediate plate, two connecting plates and two blocks of side plates; Two connecting plates connect end plate and intermediate plate; Two blocks of side plates are located at intermediate plate one side, have some rivet holes on mainboard and the guide plate, it is characterized in that this preparation method comprises the steps:
The coefficient of expansion of step 1, definite holder coal seam floor; Temperature when adopting infrared thermometer accurately to measure the flame cutting in the line of cut periphery 100mm; Drawing mean temperature is 700 ℃, the inquiry mechanical design handbook, and the value of temperature linear expansion coefficient α 1 of Q345B steel plate in the time of 700 ℃ is 14.7 * 10
-6/ ℃;
The line swell increment of step 2, calculating Q345B steel plate,
ΔL=L0×α1×C
In the formula: Δ L is the line swell increment after steel plate is out of shape through cutting, be controlled in 1%,
L0 is the initial length of steel plate,
α 1 is a linear expansion coefficient,
C is a cutting temperature,
Line swell increment after the part sheet material of each piece blanking requires it through the cutting distortion is no more than 5mm, and through calculating, drawing L0 is 486mm, and rounding is 500mm, and promptly the each length of cutting continuously of sheet material is 500mm, can guarantee that steel plate deformed is in the scope of permission;
Step 3, mainboard blanking; Adopt semi auto cutting machine mainboard to be made into two block plates of 460 * 11000mm and 460 * 10400mm; In the cutting process; The length direction synchronous cutting of two block plates is also cut by the interval of 500mm and 100mm length step by step, after all 500mm length are cut successively and are finished again row cut 100mm length successively;
Step 4, guide plate blanking; Adopt semi auto cutting machine that guide plate is processed 5000X460 end plate, 6300X460 intermediate plate, two 8200X100 connecting plates and two blocks of 1900X100 side plates totally six block plates; In the cutting process; The length direction synchronous cutting of each steel plate is also cut by the interval of 500mm and 100mm length step by step, after all 500mm length are cut successively and are finished again row cut 100mm length successively;
The splicing of step 5, mainboard and each cutting steel plate of guide plate; Adopt the splicing groove of flame-cutting preparation group butt welded seam; The splicing groove adopts bilateral V-arrangement groove, and the groove for preparing is used the control gauge check, goes after each cutting steel plate group butt welded seam of mainboard and guide plate simultaneously welds and finishes again and welds another side; A group butt welded seam is symmetrically welded during welding, and one deck weldering meat cools off back welding lower floor weldering meat naturally;
Correct after step 6, mainboard and the guide plate splicing, adopt flame correction method to take the method for triangle or the heating of " 1 " font that the linearity of mainboard and guide plate is proofreaied and correct, eliminate arc unrestrained with the limit; Heating and temperature control is at 500-600 ℃, and employing infrared thermometer measurement heating-up temperature, adopts the pressure orthosis that the flatness of mainboard and guide plate is proofreaied and correct; Mainboard or guide plate are positioned on the moulding bed, and mainboard or guide plate plane are drawn and are put horizontal wire, find out peak; Correction is to the other end in proper order from an end of steel plate school successively; Correction gate set up place on the peak, proofread and correct and between door frame and the peak hydraulic jack is set steel plate is corrected to level, after the rectification; The linearity of mainboard or four vertical ribs of guide plate is not more than 5mm, and flatness is not more than 2mm;
The contraposition boring of step 7, mainboard and guide plate rivet hole lies against guide plate on the moulding bed, lies against mainboard above the guide plate again and makes it and fit; Inspection binding face gap should be less than 2mm; Otherwise adopt the method for gagging to correct, after the rectification, take the method for spot welding that mainboard and guide plate are fixed as integral body; Dislocation occurs during in order to avoid hole, adopt radial drill to hole by technological requirement;
Rivet length is confirmed in the riveted joint of step 8, mainboard and guide plate,
In the formula: l is a rivet length (unit: mm)
δ is connected two plate gross thickness (units: mm)
d
0Be rivet hole diameter (unit: mm)
D is a rivet diameter (unit: mm)
D is a rivet counter bore diameter (unit: mm)
H is a rivet counter sink height
C is empirical value and according to the form below value
The rivet material is Q235B, and the riveted joint mode is a manual rivet, and its heating-up temperature is 1000～1100 ℃; Whole riveting temperature is 450～600 ℃, and infrared thermometer is adopted in temperature control, and holder-on should be in alignment with the ailhead center; The extension of nail bar is upset into the ailhead shape; Ailhead and surface of the work are close sticking, and the nail bar will be full of the nail hole, and the rivet blackening promptly stops riveted joint;
Step 9, mainboard and guide plate working face surface roughness are handled, the rivet point of emergence that adopts electric angle grinder and polished section polishing elimination mainboard and guide plate riveted joint back to occur, and mainboard and guide plate working face surface roughness are not higher than 12.5 μ m.
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Cited By (5)
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| CN103642507A (en) * | 2013-12-02 | 2014-03-19 | 攀钢集团工程技术有限公司 | Method for replacing and installing coal supporting baseplate in tamping coke oven coal charging car |
| CN103801911A (en) * | 2014-02-26 | 2014-05-21 | 宁波万金现代钣金有限公司 | Method for processing table frame of operating table |
| CN104148771A (en) * | 2013-05-15 | 2014-11-19 | 濮阳市江源齿轮制造有限公司 | Steel plate cutting process |
| CN104148842A (en) * | 2014-08-20 | 2014-11-19 | 攀钢集团西昌钢钒有限公司 | Online repair method and platform for coal supporting base plate of SCP machine |
| CN111889981A (en) * | 2020-08-05 | 2020-11-06 | 哈尔滨锅炉厂有限责任公司 | Method for manufacturing waist-shaped hole of sliding support base plate of deaerator of power station |
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| CN103642507B (en) * | 2013-12-02 | 2015-03-18 | 攀钢集团工程技术有限公司 | Method for replacing and installing coal supporting baseplate in tamping coke oven coal charging car |
| CN103801911A (en) * | 2014-02-26 | 2014-05-21 | 宁波万金现代钣金有限公司 | Method for processing table frame of operating table |
| CN103801911B (en) * | 2014-02-26 | 2016-06-15 | 宁波万金现代钣金有限公司 | Method for processing table frame of operating table |
| CN104148842A (en) * | 2014-08-20 | 2014-11-19 | 攀钢集团西昌钢钒有限公司 | Online repair method and platform for coal supporting base plate of SCP machine |
| CN104148842B (en) * | 2014-08-20 | 2016-02-03 | 攀钢集团西昌钢钒有限公司 | The online restorative procedure of SCP machine holder coal seam floor and reparation platform thereof |
| CN111889981A (en) * | 2020-08-05 | 2020-11-06 | 哈尔滨锅炉厂有限责任公司 | Method for manufacturing waist-shaped hole of sliding support base plate of deaerator of power station |
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Application publication date: 20120905 |