CN105414785B - A kind of marine low speed diesel engine frame manufacture method - Google Patents
A kind of marine low speed diesel engine frame manufacture method Download PDFInfo
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- CN105414785B CN105414785B CN201510906939.9A CN201510906939A CN105414785B CN 105414785 B CN105414785 B CN 105414785B CN 201510906939 A CN201510906939 A CN 201510906939A CN 105414785 B CN105414785 B CN 105414785B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000003466 welding Methods 0.000 claims abstract description 170
- 239000000463 material Substances 0.000 claims abstract description 16
- 230000032683 aging Effects 0.000 claims abstract description 5
- 238000000137 annealing Methods 0.000 claims abstract description 5
- 238000005520 cutting process Methods 0.000 claims abstract description 5
- 238000001514 detection method Methods 0.000 claims abstract description 5
- 238000003860 storage Methods 0.000 claims abstract description 5
- 230000035882 stress Effects 0.000 claims abstract description 4
- 230000008569 process Effects 0.000 claims description 13
- 238000000465 moulding Methods 0.000 claims description 12
- 238000005498 polishing Methods 0.000 claims description 12
- 238000004140 cleaning Methods 0.000 claims description 10
- 239000004744 fabric Substances 0.000 claims description 10
- 239000002893 slag Substances 0.000 claims description 9
- 238000005516 engineering process Methods 0.000 claims description 7
- 238000007689 inspection Methods 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 5
- 230000008602 contraction Effects 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 206010054949 Metaplasia Diseases 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000015689 metaplastic ossification Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/12—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to investigating the properties, e.g. the weldability, of materials
- B23K31/125—Weld quality monitoring
Abstract
The invention discloses a kind of marine low speed diesel engine frame manufacture method, step are as follows：The first step：Frame is divided into three frame first section, frame stage casing and frame endpiece modules, root module includes several structures and size identical frame stage casing wherein in frame；Second step：Cutting stock is carried out to all parts sheet materials of each section of frame according to the design size of frame；Welding is processed to groove again, sheet material is finally carried out and sorts out storage；3rd step：Using CO2Welding, substep welding is carried out to three frame first section, frame stage casing and frame endpiece modules respectively；4th step：Three frame first section, frame stage casing and frame endpiece modules are carried out splicing and closed up；5th step：Finally attachment weld is made annealing treatment, reduces residual stress caused by join domain welding；Ageing Treatment and flaw detection are carried out after the completion of frame bulk heat treatmet, makes up to every design standard.The present invention has the advantages of production efficiency is high, interchangeability and versatility are good long.
Description
Technical field
The invention belongs to Diesel Engine Technique Field, the modularization weldering of more particularly to a kind of argosy low-speed diesel engine frame
Connect, the manufacture method of overall spicing forming type.
Background technology
As the important component of diesel engine, frame plays support cylinder block in diesel engine, forms crank with support
The important function of case, the performance of frame directly affect the reliability of diesel engine.By Patent No. ZL02145176.1 document
A kind of welding method of low-speed diesel engine frame is disclosed, mainly passes through a series of positioning hole, positioning iron pipe and complexity
Lug, the device such as moulding bed complete the overall welding of frame, but this method is cumbersome and the uniformity of frame that produces
It is poor.Patent No. ZL201010530701.8 document discloses a kind of automatic welding for marine diesel frame support
System, the automatic soldering method welded using real-time tracking substitute traditional manual semi-automatic welding pattern, and this method is being welded
The improvement of automation is realized in pattern, but is a lack of certain welding strategy, the interchangeability of production efficiency and product is relatively low.
Following defect be present in currently known technology：(1) welding process is complicated, inefficient, with consistent between batch frame
Property it is bad, be not suitable for mass production manufacture.(2) modularization of structure is not carried out between frame main modular, lacks exchange
Property and versatility, it is local the defects of easily cause it is overall scrap, manufacturing cost is high.
The content of the invention
To solve problem above present in prior art, the present invention provide a kind of production efficiency is high, interchangeability with it is general
The good marine low speed diesel engine frame manufacture method of property, is comprised the following steps that：
The first step：Frame is divided into root module and frame endpiece module, wherein frame stage casing in frame first section module, frame
Module includes several structures and size identical frame stage casing, and the frame stage casing has complete interchangeability.By reasonable
It is structural segmented strategy by root module in frame be divided into several structures and size it is identical and with absolute interchangeability machine
Frame stage casing so that the frame uniformity finally produced is more preferable, greatly reduces product rejection rate, improves production efficiency.Together
When according to the difference of each diesel engine stand size can increase or reduce the quantity in frame stage casing in root module in frame, from
And the more convenient diesel engine stand for producing different size in enormous quantities.
Second step：Cutting stock is carried out to all parts sheet materials of each section of frame according to the design size of frame；Wherein
Frame first section is included between the bottom plate of bottom, the floor on both sides, the butterfly plate at middle part, the web of lower section, web and butterfly plate
The top plate of dividing plate, the side plate of both sides and top；Welding is processed to groove again, sheet material is finally carried out and sorts out storage；
3rd step：Using CO2Welding, three frame first section, frame stage casing and frame endpiece modules are divided respectively
Step welding；Wherein, CO2Flow is 20~22L/min, and welding current is 300~360A, and weldingvoltage is 30~36V；
4th step：Three frame first section, frame stage casing and frame endpiece modules are carried out splicing and closed up；In welding process
The coaxiality error of each section of frame is tested and revised using laser collimation technology；
5th step：Finally attachment weld is made annealing treatment, reduces residual stress caused by join domain welding；Frame
Ageing Treatment and flaw detection are carried out after the completion of bulk heat treatmet, makes up to every design standard.
Wherein, the welding step of frame first section module is as follows described in the 3rd step：
1) structure gives frame cloth tire, the flatness and the error of perpendicularity≤0.5mm of welding positioner by their entirety；
2) whole sheet materials of frame first section are selected, first section bottom plate is fixed on moulding bed first, it is accurate to measure bottom plate line
With examining line, it is ensured that two lines are overlapped so that sum moulding bed is securely fixed together；
3) start to carry out cloth weldering to two pieces of dividing plates of frame first section after the completion of the fixation of first section bottom plate, needed dividing plate before welding
Need welding position to be marked with foot welding height between bottom plate clear and definite, control welding contracted quantity, welding and assembling height 7.5mm, amount of contraction
For 1mm/1000mm, while ensure squareness tolerance≤0.09mm of dividing plate；
4) dividing plate welding is smooth by weld grinding after terminating, and the weldering of frame first section floor and web is carried out after upchecking
Connect, ensure its welding precision and Tolerance of Degree of position.Symmetrical while cloth is carried out when welding floor to weld, and ensures the essence of welding
Degree；
5) floor, web welding are completed to carry out the cleaning of welding slag and the polishing of weld seam in time, and machine is carried out after upchecking
The welding of frame first section side plate, ensures its welding precision and Tolerance of Degree of position.
6) plate-side plate welding is completed to carry out the cleaning of welding slag and the polishing of weld seam in time, and frame first section is carried out after upchecking
The welding of top plate, due to will be contacted after frame top plate with the assembling of the cylinder block of diesel engine, therefore it need to ensure in welding top plate
The accuracy of its levelness, the flatness of weld seam and physical dimension.
7) cleaning of welding slag and the polishing of weld seam are carried out after the completion of top plate welding in time, to physical dimension, welding performance
Carry out related inspection.
Wherein, root module carries out automatic welding, the specific step of welding using welding robot in frame described in the 3rd step
It is rapid as follows：
1) required all kinds of sheet materials are sorted out according to the physical dimension of each subsegment in each frame stage casing and is put into welding
The feeding storehouse of line, it is respectively：Bottom plate, seven floor, butterfly plate, web, dividing plate, side plate and top plate feed bins；
2) welding robot resets and sets the origin of coordinates；According to the technological requirement and position while welding in frame stage casing, to reality
Border welding track is programmed；Using CO2Welding, welding parameter is set：CO2Flow：20~22L/min, welding current：300
~360A, weldingvoltage：30~36V；
3) remaining frame stage casing is welded by identical step again after the completion of a frame stage casing；
4) weld seam in institute's organic frame stage casing to after the completion of is cleared up and polished, and weldquality is tested, and presses
It is required that the physical dimension and Tolerance of Degree of position in frame stage casing are tested.
Wherein, the welding step of frame endpiece module described in the 3rd step is consistent with the welding step of frame first section module.
Wherein, the 4th step comprises the following steps that：
1) it will be cleaned out between each parts for welding the welding groove closed up, while set up installation laser alignment
The generating laser of instrument and light target recipient, adjustment Laser emission orientation, make laser correctly directive light target；
2) institute's organic frame stage casing in frame in root module carries out welding and closed up；By each subsegment frame under frame stage casing
It is lifted on moulding bed, position error is checked by the laser collimator set up in advance, and ensures bottom plate line and examine line
Overlap, make straightness error≤0.5mm；Secondly, spot welding positioning is carried out, tentatively stage casing frame links together；Then to machine
The position error in frame stage casing carries out secondary check and amendment；It is to be adjusted to finish, all welding grooves are carried out with full weld, it is final complete
Into closing up for frame stage casing；
3) the frame first section of machined completion and frame endpiece are lifted to the front and back position corresponding to frame stage casing, then
The position error of amendment frame is checked using laser alignment；Carry out overall three modules recently closes up welding；First carry out a little
Primary Location is welded, secondly carries out secondary check amendment error amount, the welding to entirety is finally completed and closes up.
Compared with prior art, the advantage of the invention is that：
(1) frame uses modularized processing in the present invention, passes through three frame first section, frame stage casing and frame endpiece modules
The modularization for carrying out big aspect is collected, while corresponding module is integrated by multiple small parts again, realizes batch metaplasia
Production and standardized production.
(2) CO is used when being welded to three big modules2Welding, and welding parameter is strictly controlled, ensure weldquality.
And the coaxiality error of each section of frame is tested and revised by laser collimation technology, so as to ensure the installation essence after assembling
Degree and reduction later stage polishing amount and activity time, improve operating efficiency indirectly.
(3) root module is formed using several parts of identical in frame, is readily transported and is lifted and reduces follow-up
The mark of the relative position of assembling process and allotment, because each part has interchangeability, reduce product rejection rate, improve
Production efficiency.It can be increased or reduced in frame in root module in frame according to the difference of each diesel engine stand size simultaneously
The quantity of section, so as to the more convenient diesel engine stand for producing different size in enormous quantities.
(4) carry out closing up welding for some in root module in frame, straightener is checked by using laser alignment
Carry out closing up welding after the position error of frame, and carry out spot welding Primary Location again, can further reduce various pieces it
Between second order error.Secondary check amendment error amount is carried out afterwards, finally can accurately be completed the welding to entirety and be closed up, subtract
The scrappage in production process is lacked.
Brief description of the drawings
Fig. 1 is the structural representation of diesel engine stand in the present invention；
Fig. 2 is the top view of diesel engine stand in the present invention；
Fig. 3 is the left view of diesel engine stand in the present invention；
Fig. 4 is the stepwise schematic views of diesel engine stand in the present invention.
11st, frame first section module, 111, bottom plate, 112, floor, 113, butterfly plate, 114, web, 115, dividing plate, 116, side
Plate, 117, top plate, 21, frame stage casing A, 22, frame stage casing B, 23, frame stage casing C, 24, frame stage casing D, 25, frame stage casing E,
31st, frame endpiece module.
Embodiment
With reference to the accompanying drawings and detailed description, the present invention is furture elucidated.
As Figure 1-4, the invention mainly comprises following steps：
The first step：Certain type marine diesel frame as shown in Figure 1, Figure 2 and Figure 4, can be by its point according to its structure type
Duan Wei：Frame first section module 11；Frame stage casing A21, frame stage casing B22, frame stage casing C23, frame stage casing D24 and frame stage casing
E25；And frame endpiece module 31.Wherein, root module includes frame stage casing A21, frame stage casing B22, frame stage casing in frame
C23, frame stage casing D24 and the parts of frame stage casing E25 five, and due to frame stage casing A21, frame stage casing B22, frame stage casing
C23, frame stage casing D24 and the parts of frame stage casing E25 five are with identical structure type and dimensional parameters thus with complete
Full interchangeability.Root module in frame is divided into by five parts, and the knot of each part by rational structural segmented strategy
Structure and size are identical so that the frame uniformity finally produced is more preferable, greatly reduces product rejection rate, improves production
Efficiency.It can increase or reduce in frame frame stage casing in root module according to the difference of each diesel engine stand size simultaneously
Quantity, so as to the more convenient diesel engine stand for producing different size in enormous quantities.
Second step：Cutting stock is carried out to the sheet material in three modules respectively, welding groove is processed and sorts out storage.Root
Each section of all parts sheet materials of frame are carried out cutting stock, such as Fig. 3 by design size and the partition strategy specified according to frame
It is shown, the wherein bottom plate 111 of frame first section module 11, floor 112, butterfly plate 113, web 114, dividing plate 115, the and of side plate 116
Top plate 117.And welding groove is processed, finally carry out sheet material and sort out storage, facilitate following process to use.By to each module point
For multiple small parts and small part is integrated, to realize mass production and standardized production.Meanwhile in production
During, if a part, which has flaw to change part, to have saved production cost without whole module is changed,
It is more beneficial for improving the efficiency of production.
3rd step：Using CO2Welding, substep welding is carried out to three modules respectively.Wherein, CO2Flow is 20~22L/
Min, welding current are 300~360A, and weldingvoltage is 30~36V.CO is used during by being welded to three big modules2Welding
Method, it is strict to control welding parameter to use above-mentioned standard, ensure weldquality.
(1) welding step of frame first section 11 is as follows：
A, structure gives frame cloth tire, the flatness and the error of perpendicularity≤0.5mm of welding positioner by their entirety.Select Error≤
0.5mm flatness and perpendicularity is enabled in follow-up welding process, increases the stability of moulding bed, so as to reduce product report
Useless rate, improve the efficiency of production.
B, whole sheet materials of frame first section are selected, first section bottom plate is fixed on moulding bed first, it is accurate to measure bottom plate line
With examining line, it is ensured that two lines are overlapped so that sum moulding bed is securely fixed together.First section bottom plate is accurately fixed on moulding bed
After together, the work for formality can play more accurate effect, reduce the error problem in subsequent production.
C, start to carry out cloth weldering to two pieces of dividing plates of frame first section after the completion of the fixation of first section bottom plate, needed dividing plate before welding
Need welding position to be marked with foot welding height between bottom plate clear and definite, control welding contracted quantity, welding and assembling height 7.5mm, amount of contraction
For 1mm/1000mm, while ensure that squareness tolerance≤0.09mm of dividing plate, and other form and position tolerances reach design requirement.
7.5mm welding and assembling height, 1mm/1000mm amount of contraction and≤0.09mm squareness tolerance is specified, not only ensures and is welding
During can reduce error, while ensure scrappage being preferably minimized, reduce production cost.
D, dividing plate welding is smooth by weld grinding after terminating, and the weldering of frame first section floor and web is carried out after upchecking
Connect, ensure its welding precision and Tolerance of Degree of position.Symmetrical while cloth is carried out when welding floor to weld, and ensures the essence of welding
Degree.Floor carries out left and right cloth weldering simultaneously and is able to ensure that symmetrical, and the report of frame first section can be reduced in follow-up welding process
Useless rate.
E, floor, web welding are completed to carry out the cleaning of welding slag and the polishing of weld seam in time, and machine is carried out after upchecking
The welding of frame first section side plate, ensures its welding precision and Tolerance of Degree of position.
F, plate-side plate welding is completed to carry out the cleaning of welding slag and the polishing of weld seam in time, and frame first section is carried out after upchecking
The welding of top plate, due to will be contacted after frame top plate with the assembling of the cylinder block of diesel engine, therefore it need to ensure in welding top plate
The accuracy of its levelness, the flatness of weld seam and physical dimension.
G, the cleaning of welding slag and the polishing of weld seam are carried out after the completion of top plate welding in time, to physical dimension, welding performance
Carry out related inspection.
(2) frame stage casing A21 is welded.Frame stage casing A21 welding process can be carried out according to the method for frame first section 11,
Local difference, which also needs to treat with a certain discrimination, ensures that every welding quality reaches expected requirement.Some other frame stage casing B22, frame stage casings
C23, frame stage casing D24, frame stage casing E25 can carry out mass welding using consistent welding method, be come with this effective
The production efficiency of frame stage casing manufacture is improved, while also ensure that the good interchangeability of frame stage casing A21.Due to frame stage casing
Each subsegment structure is identical under A21, carries out automatic welding using welding robot herein.Welded using robot, Neng Gouti
High efficiency, save the time, while more preferable control, it is ensured that the accuracy in welding process, product rejection rate is preferably minimized.It has
Body step is as follows：
A, sheet material is stocked up.Required all kinds of sheet materials are sorted out simultaneously according to the physical dimension of each subsegment under the A21 of frame stage casing
The feeding storehouse of sealing wire is put into, is respectively：Bottom plate, seven floor, butterfly plate, web, dividing plate, side plate and top plate feed bins.
B, numerical control is welded.Welding robot resets and sets the origin of coordinates；According to the technological requirement and weld seam in frame stage casing
Position, actual welding track is programmed；Pass through robot welding, it is ensured that welding precision.Use CO simultaneously2Welding,
Welding parameter is set：CO2Flow：20~22L/min, welding current：300~360A, weldingvoltage：30~36V.Adopted during welding
Use CO2Welding, strictly control welding parameter；Using above-mentioned standard, weldquality is ensured.
C, welding post processing and inspection.Necessary cleaning and polishing are carried out to weld seam, weldquality is tested.And press
It is required that the physical dimension and Tolerance of Degree of position in frame stage casing are tested, it is ensured that product quality.
(3) frame endpiece 31 welds.The welding process of frame tail 31 can be carried out according to the method for frame first section 11, local
Difference, which also needs to treat with a certain discrimination, ensures that every welding quality reaches expected requirement.
4th step：Three first section, stage casing, endpiece modules are carried out splicing and closed up.To ensure to close up precision, in welding process
It is middle that the coaxiality error of each section of frame is tested and revised using laser collimation technology.By laser collimation technology to frame
Each section of coaxiality error is tested and revised, so as to ensure the installation accuracy after assembling and reduce later stage polishing amount and process
Time, subsequent handling operating efficiency is improved indirectly.Comprise the following steps that：
A, will be cleaned out between each submodule for welding the welding groove closed up, in case used in following process,
Meanwhile the generating laser and light target recipient of installation laser collimator are set up, adjustment Laser emission orientation, make laser correctly
Directive light target.
B, frame stage casing A21, frame stage casing B22, frame stage casing C23, frame stage casing D24 and frame stage casing E25 are welded
Engagement is held together.Each subsegment frame under frame stage casing is lifted on moulding bed, beneficial to the laser collimator inspection set up in advance
Position error, while ensure bottom plate line and examine line to overlap, make straightness error≤0.5mm.Secondly, spot welding is carried out to determine
Position, tentatively links together stage casing frame.Secondary check and amendment are carried out to the position error in frame stage casing again.Wait to adjust
It is whole to finish, full weld is carried out to all welding grooves, Multi-station synchronous welding can be used to reduce the error of welding.It is finally completed machine
Frame stage casing closes up.
C, the frame first section 11 of machined completion and frame endpiece 31 are lifted to the front and back position corresponding to frame stage casing.
Secondly amendment frame positive position degree error is checked using laser alignment, is allowed to meet to require.Carry out overall three big sections closes up weldering
Connect.Still spot welding Primary Location is first carried out, secondly carries out secondary check amendment error amount.The welding to entirety is finally completed to close
Hold together.
5th step：Annealing, Ageing Treatment and flaw detection.Finally attachment weld is made annealing treatment, the company of reduction
Connect residual stress caused by the welding of region.Necessary Ageing Treatment and necessary flaw detection inspection are carried out after the completion of frame bulk heat treatmet
Test, make up to every design standard.
Embodiments of the invention is the foregoing is only, is not intended to limit the invention, the present invention is for long-range string
Level control is especially suitable.All equivalent substitutions within the principle of the present invention, made, should be included in protection scope of the present invention
Within.The content that the present invention is not elaborated belongs to prior art known to this professional domain technical staff.
Claims (3)
- A kind of 1. marine low speed diesel engine frame manufacture method, it is characterised in that：Comprise the following steps：The first step：Frame is divided into root module and frame endpiece module, wherein root module in frame in frame first section module, frame Including several structures and size identical frame stage casing, the frame stage casing has complete interchangeability；Second step：Cutting stock is carried out to all parts sheet materials of each section of frame according to the design size of frame；Wherein frame First section include dividing plate between the bottom plate of bottom, the floor on both sides, the butterfly plate at middle part, the web of lower section, web and butterfly plate, The side plate of both sides and the top plate at top；Welding is processed to groove again, sheet material is finally carried out and sorts out storage；3rd step：Using CO2Welding, substep weldering is carried out to three frame first section, frame stage casing and frame endpiece modules respectively Connect；Wherein, CO2Flow is 20 ~ 22L/min, and welding current is 300 ~ 360A, and weldingvoltage is 30 ~ 36V；4th step：Three frame first section, frame stage casing and frame endpiece modules are carried out splicing and closed up；Used in welding process Laser collimation technology is tested and revised to the coaxiality error of each section of frame；5th step：Finally attachment weld is made annealing treatment, reduces residual stress caused by join domain welding；Frame is overall Ageing Treatment and flaw detection are carried out after the completion of heat treatment, makes up to every design standard；The welding step of frame first section module is as follows described in 3rd step：1）Structure gives frame cloth tire, the flatness and the error of perpendicularity≤0.5mm of welding positioner by their entirety；2）Whole sheet materials of frame first section are selected, first section bottom plate is fixed on moulding bed first, it is accurate to measure bottom plate line and inspection Test line, it is ensured that two lines are overlapped so that sum moulding bed is securely fixed together；3）Start to carry out cloth weldering to two pieces of dividing plates of frame first section after the completion of the fixation of first section bottom plate, needed dividing plate and bottom before welding Need welding position to be marked with foot welding height between plate clear and definite, control welding contracted quantity, welding and assembling height 7.5mm, amount of contraction is 1mm/1000mm, while ensure squareness tolerance≤0.09mm of dividing plate；4）Dividing plate welding is smooth by weld grinding after terminating, and the welding of frame first section floor and web is carried out after upchecking, and protects Demonstrate,prove its welding precision and Tolerance of Degree of position；Symmetrical while cloth is carried out when welding floor to weld, and ensures the precision of welding；5）Floor, web welding are completed to carry out the cleaning of welding slag and the polishing of weld seam in time, and it is first that frame is carried out after upchecking The welding of section side plate, ensures its welding precision and Tolerance of Degree of position；6）Plate-side plate welding is completed to carry out the cleaning of welding slag and the polishing of weld seam in time, and frame first section top plate is carried out after upchecking Welding, due to will be contacted after frame top plate with the assembling of the cylinder block of diesel engine, therefore its water need to be ensured in welding top plate The accuracy of Pingdu, the flatness of weld seam and physical dimension；7）The cleaning of welding slag and the polishing of weld seam are carried out after the completion of top plate welding in time, physical dimension, welding performance are carried out Related inspection.
- A kind of 2. marine low speed diesel engine frame manufacture method according to claim 1, it is characterised in that：Institute in 3rd step State root module in frame and automatic welding is carried out using welding robot, welding comprises the following steps that：1）Required all kinds of sheet materials are sorted out according to the physical dimension of each subsegment in each frame stage casing and are put into sealing wire Feeding storehouse, it is respectively：Bottom plate, seven floor, butterfly plate, web, dividing plate, side plate and top plate feed bins；2）Welding robot resets and sets the origin of coordinates；According to the technological requirement and position while welding in frame stage casing, to actual weldering The mark that integrates with is programmed；Using CO2Welding, welding parameter is set：CO2Flow：20 ~ 22L/min, welding current：300~ 360A, weldingvoltage：30~36V；3）Other frame stage casings are welded by identical step again after the completion of one frame stage casing；4）The weld seam in all frame stage casings is cleared up and polished to after the completion of, and weldquality is tested, and on request The physical dimension and Tolerance of Degree of position in frame stage casing are tested.
- A kind of 3. marine low speed diesel engine frame manufacture method according to claim 2, it is characterised in that：The tool of 4th step Body step is as follows：1）It will be cleaned out between each parts for welding the welding groove closed up, while set up installation laser collimator Generating laser and light target recipient, adjustment Laser emission orientation, make laser correctly directive light target；2）Welding is carried out to each frame stage casing in root module in frame to close up；Each subsegment frame under frame stage casing is lifted In on moulding bed, position error is checked by the laser collimator set up in advance, and ensures bottom plate line and examines line to overlap, Make straightness error≤0.5mm；Secondly, spot welding positioning is carried out, tentatively stage casing frame links together；Then to frame stage casing Position error carry out it is secondary check and amendment；It is to be adjusted to finish, full weld is carried out to all welding grooves, is finally completed frame Stage casing closes up；3）The frame first section of machined completion and frame endpiece are lifted to the front and back position corresponding to frame stage casing, then used Laser alignment checks the position error of amendment frame；Carry out overall three modules recently closes up welding；At the beginning of first carrying out spot welding Step positioning, secondly carries out secondary check amendment error amount, finally completes the welding to entirety and closes up.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510906939.9A CN105414785B (en) | 2015-12-09 | 2015-12-09 | A kind of marine low speed diesel engine frame manufacture method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510906939.9A CN105414785B (en) | 2015-12-09 | 2015-12-09 | A kind of marine low speed diesel engine frame manufacture method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105414785A CN105414785A (en) | 2016-03-23 |
| CN105414785B true CN105414785B (en) | 2017-12-26 |
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| CN106077983B (en) * | 2016-06-29 | 2019-08-02 | 安徽涌诚机械有限公司 | High precision large-sized welding machine frame process |
| CN108127284B (en) * | 2017-12-29 | 2020-09-25 | 中船海洋动力部件有限公司 | Assembly method before welding for marine diesel engine frame |
| CN108673054A (en) * | 2018-06-28 | 2018-10-19 | 中铁山桥集团有限公司 | A kind of stock method of super large-scale steel construction shaped piece |
| CN110471379B (en) * | 2019-08-13 | 2020-10-27 | 清华大学 | Assembly production system and method |
| CN112743211B (en) * | 2019-10-29 | 2022-12-27 | 中船海洋动力部件有限公司 | Welding method and device for cross beam part and side plate assembly of diesel engine base |
| CN111168315A (en) * | 2020-02-26 | 2020-05-19 | 中国船舶重工集团柴油机有限公司 | Single-piece welding method for low-speed diesel engine frame for ship |
| CN111872643A (en) * | 2020-08-04 | 2020-11-03 | 中国船舶重工集团柴油机有限公司 | Assembly welding process for guide rail plate, wing plate and bottom plate of diesel engine frame and product |
| CN113478148A (en) * | 2021-07-20 | 2021-10-08 | 中国船舶重工集团柴油机有限公司 | Rapid assembling and welding tool and method for diesel engine frame pedal |
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| JP3696137B2 (en) * | 2000-09-08 | 2005-09-14 | 株式会社藤田ワークス | Method for producing electrolytic cell unit and electrolytic cell unit |
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| CN100395074C (en) * | 2005-07-20 | 2008-06-18 | 沪东重机有限公司 | Welding method for triangle screw sleeve type machine frame |
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