CN109623006A - A kind of method of inclined tube drilling processing on tube sheet - Google Patents
A kind of method of inclined tube drilling processing on tube sheet Download PDFInfo
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- CN109623006A CN109623006A CN201811545049.XA CN201811545049A CN109623006A CN 109623006 A CN109623006 A CN 109623006A CN 201811545049 A CN201811545049 A CN 201811545049A CN 109623006 A CN109623006 A CN 109623006A
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- 238000005553 drilling Methods 0.000 title claims abstract description 67
- 238000000034 method Methods 0.000 title claims abstract description 66
- 238000012545 processing Methods 0.000 title claims abstract description 65
- 238000003466 welding Methods 0.000 claims abstract description 34
- 238000003780 insertion Methods 0.000 claims abstract description 5
- 230000037431 insertion Effects 0.000 claims abstract description 5
- 238000005259 measurement Methods 0.000 claims description 7
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000003032 molecular docking Methods 0.000 claims description 2
- 238000007781 pre-processing Methods 0.000 claims 1
- 238000003754 machining Methods 0.000 abstract description 7
- 230000002441 reversible effect Effects 0.000 abstract description 2
- 239000011148 porous material Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 5
- 238000003672 processing method Methods 0.000 description 4
- 230000003252 repetitive effect Effects 0.000 description 4
- 238000005070 sampling Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 230000002427 irreversible effect Effects 0.000 description 2
- 238000013519 translation Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
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- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B41/00—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B47/00—Constructional features of components specially designed for boring or drilling machines; Accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
- Drilling And Boring (AREA)
Abstract
The invention discloses a kind of methods of inclined tube drilling processing on tube sheet, the described method comprises the following steps: step 1, processing prebored hole (1) on tube sheet；Step 2, it will take over (2) insertion prebored hole (1), and be welded to connect；Step 3, the actual angle of welding rear tube (2) and tube sheet is obtained；Step 4, final apertures (6) are obtained to beat to the location information of target area on tube sheet；Step 5, whether the location information of the final apertures (6) obtained in judgment step 4 meets the requirements, to carry out following process.Method disclosed by the invention, easy to operate, condition is easily-controllable, applied widely, and is able to achieve the reversible processing of drilling, machining accuracy and high-efficient.
Description
Technical field
The present invention relates to steam generator twist drill hole machined fields, and in particular to inclined tube drilling processing on a kind of tube sheet
Method.
Background technique
Steam generator is large-scale heat exchange equipment critically important in a kind of nuclear power generating system, is that primary Ioops and secondary circuit connect
The hinge connect, while being also the shielding of primary Ioops and secondary circuit, also having prevents fluid with radionuclide from entering secondary circuit, with
Conventional island equipment is kept not have radioactive function.
Tube sheet component is the critical component of steam generator, and there are two inclined tubes for setting on it, is such as used to drain and secondary
The drain nozzle of side blowdown, drain nozzle need to carry out drilling processing, and hole is run through from adapter tube and extends to the secondary side surface of tube sheet.
Weep hole is a kind of inclined hole, needs to carry out stringent angle control, and weep hole and pore bridge, tube sheet secondary side in the machine added-time
Straight section has the requirement of geometric tolerance.
In the prior art to the processing of weep hole generally use first by tube sheet and drain nozzle according to predetermined angular one at
Type, then the method to drill, or tube sheet and drain nozzle are drilled hole respectively, then the method welded.The above method
The problem is that: tube sheet and integrally formed manufacturing process early period of adapter tube are more complex, higher cost, low efficiency；It drills respectively
It is welded again afterwards, since welding deformation causes the concentricity for drilling in tube sheet with drilling in adapter tube to be difficult to control, and error is tired
Product is larger, and precision is low, and product quality is more difficult up to standard；In addition, method in the prior art does not have invertibity, once occur inclined
Difference will generate the influence of unrepairable to tube sheet and drain nozzle, will lead to and scrap when serious.
Therefore, at present urgent need to resolve the problem of be to provide the method for inclined tube drilling processing on tube sheet a kind of, this method is efficient
Low cost, machining accuracy are high, have invertibity.
Summary of the invention
In order to overcome the above problem, present inventor has performed sharp studies, as a result, it has been found that: before drilling, first it will take over
It is welded with tube sheet according to predetermined angular, the actual corners of welding deformation rear tube and tube sheet is then obtained by centering and virtual borehole
Degree, then the data that virtual borehole obtains are merged with the actual size tomograph of workpiece, the position of available final apertures
Information provides foundation for the adjustment of following process parameter, realizes the invertibity of inclined tube drilling processing, improve machining accuracy and effect
Rate, to realize the present invention.
In particular it is object of the present invention to provide following aspect:
The present invention provides a kind of methods of inclined tube drilling processing on tube sheet, wherein the described method comprises the following steps:
Step 1, prebored hole 1 is processed on tube sheet；
Step 2,2 insertion prebored holes 1 be will take over, and be welded to connect；
Step 3, the actual angle of welding rear tube 2 and tube sheet is obtained；
Step 4, final apertures 6 is obtained to beat to the location information of target area on tube sheet；
Step 5, whether the location information of the final apertures 6 obtained in judgment step 4 meets the requirements, to carry out following process.
Wherein, in step 1, the prebored hole 1 is inclined hole, before processing prebored hole, first by tube sheet and boring bar tool master
The angle of axis is adjusted to predetermined angular；
Preferably, the prebored hole 1 is blind hole, and diameter is less than the aperture of final apertures 6.
Wherein, in step 2, the adapter tube 2 is interference fitted with prebored hole 1, so that adapter tube will not generate relatively with prebored hole
Displacement.
Wherein, in step 2, during adapter tube 2 welds, the angle of adapter tube 2 and tube sheet need to be measured using measuring tool,
In order to adjust welding parameter in time, so that adapter tube 2 and tube sheet keep predetermined angular.
Wherein, step 3 includes following sub-step:
Step 3-1 will take over 2 and carry out centering processing with boring bar tool；
Step 3-2 carries out virtual borehole processing by the angle after centering, obtains the actual corners of welding rear tube 2 and tube sheet
Degree.
Wherein, the step 3-2 the following steps are included:
Step 3-2-1 obtains the spatial data of plane 4 where after drilling is beaten to tube sheet target area；
Step 3-2-2 obtains the spatial data of boring bar tool main shaft；
Step 3-2-3 obtains the actual angle of welding rear tube 2 and tube sheet.
Wherein, in step 5, when the location information of the final apertures 6 obtained in step 4 is met the requirements, according in step 3-1
The centering angle of boring bar tool carries out drilling processing processing；
Wherein, when the location information of the final apertures 6 obtained in step 4 is unsatisfactory for requiring, to the position of boring bar tool into
Row trim process or docking tube angulation are corrected processing.
Wherein, the drill bit that the subsequent drilling processing uses diameter to be less than 6 aperture of final apertures first carries out primary drilling；
Preferably, before primary drilling, the gross data of its virtual manufacture is first obtained, is drilled into tube sheet mesh in primary drilling
After marking region, the actual location data of primary drilling is measured.
Wherein, the actual location data of primary drilling is compared with gross data,
As difference≤4mm of the two position, preferably≤2.0mm when, then to meet drawing requirement, can carry out in next step plus
Work；
As the difference > 4mm of the two position, then to be unsatisfactory for drawing requirement, need to be adjusted.
Wherein, the workpiece for meeting drawing requirement to primary drilling carries out reaming processing, to process final apertures；
The diameter that drill bit used is processed in the reaming is identical as the diameter of final apertures.
Beneficial effect possessed by the present invention includes:
(1) on tube sheet provided by the invention inclined tube drilling processing method, easy to operate, condition is easily-controllable, at low cost, is applicable in
Range is wide；
(2) on tube sheet provided by the invention inclined tube drilling processing method, first the solid tube to tube sheet welding that connects is integrated,
Unified punching is carried out again, is avoided the error for generating adjustment drilling concentricity, is reduced operation difficulty；
(3) on tube sheet provided by the invention inclined tube drilling processing method, pass through virtual borehole determine adapter tube with tube sheet press from both sides
Angle improves machining accuracy；
(4) on tube sheet provided by the invention inclined tube drilling processing method, by by the reality of virtual manufacture data and workpiece
Border size three-dimensional structure fusion, it is therefore foreseen that drilling processing as a result, the adjustment of following process parameter can be carried out according to result, realize
Reversible processing, effectively increases processing efficiency, reduces loss.
Detailed description of the invention
Fig. 1 shows the schematic diagram that a kind of tube sheet of preferred embodiment according to the present invention only processes prebored hole；
Fig. 2 shows the schematic diagrames that inclined tube drilling is completed on a kind of tube sheet of preferred embodiment according to the present invention；
Fig. 3 shows a kind of schematic diagram of the virtual borehole of preferred embodiment according to the present invention；
The drilling that Fig. 4 shows a kind of preferred embodiment according to the present invention, which is beaten to the partial enlargement behind tube sheet target area, to be shown
It is intended to；
Fig. 5 shows the structural schematic diagram of drain nozzle in the embodiment of the present invention；
Fig. 6 shows the plan view of the tube sheet secondary side simulated in the embodiment of the present invention；
Fig. 7 shows the schematic diagram for obtaining final apertures location information in the embodiment of the present invention in tomograph.
Drawing reference numeral explanation:
1- prebored hole；
2- adapter tube；
3- weld seam；
4- tube sheet target area；
The axis of 5- boring bar tool；
6- final apertures；
7- tube sheet pore；
8- tube sheet secondary side straight section；
The predetermined angular of α-tube sheet and adapter tube；
Final apertures is at a distance from immediate tube sheet pore in A- drawing；
Final apertures is at a distance from tube sheet secondary side straight section in B- drawing；
The final apertures of A'- virtual manufacture is at a distance from immediate tube sheet pore；
The final apertures of B'- virtual manufacture is at a distance from tube sheet secondary side straight section.
Specific embodiment
Below by drawings and embodiments, the present invention is described in more detail.Illustrated by these, spy of the invention
Point and advantage will become more apparent from clear.
Dedicated word " exemplary " means " being used as example, embodiment or illustrative " herein.Here as " exemplary "
Illustrated any embodiment should not necessarily be construed as preferred or advantageous over other embodiments.Although embodiment is shown in the attached drawings
Various aspects, but unless otherwise indicated, it is not necessary to attached drawing drawn to scale.
The present invention provides a kind of methods of inclined tube drilling processing on tube sheet, the described method comprises the following steps:
Step 1, prebored hole 1 is processed on tube sheet.
A kind of preferred embodiment according to the present invention, as shown in Figure 1, the prebored hole 1 is inclined hole, in processing prebored hole
Before, first the angle of tube sheet and boring bar tool main shaft is adjusted to predetermined angle.
Wherein, the predetermined angular is angle (the i.e. nominal ruler of product drawing upper angle that inclined tube and tube sheet are processed into
Very little angle).
In the present invention, prebored hole can be adjusted by adjusting tube sheet and/or the method for adjusting boring bar tool main shaft angle
Predetermined angular.Such as: the position of tube sheet immobilizes, and the position by adjusting boring bar tool main shaft adjusts the angle of prebored hole.
In further preferred embodiment, the prebored hole is blind hole, and diameter is less than the aperture of final apertures.
In the present invention, the diameter of prebored hole is set smaller than to the aperture of final apertures, can be mentioned for the processing of final apertures
For surplus, in order to be finely adjusted on the basis of prebored hole.
In embodiment still more preferably, the ratio in the aperture of the prebored hole and final apertures aperture be (12~
16): 23, preferably (13~15): 23, more preferably 14:23.
Step 2, it will take over insertion prebored hole 1, and be welded to connect.
In the present invention, the adapter tube to be processed is solid rod shaped materials, and the drilling method of use is will first to connect
Tube to tube sheet welding, then the method for carrying out unified drilling.The present inventor has found after study, enables to tube sheet using the method
With the hole one-pass molding in adapter tube, the error that concentricity adjustment generates in the prior art can be evaded.
According to the present invention in a kind of preferred embodiment, the pipe ends and prebored hole are interference fitted, so that adapter tube
Relative displacement will not be generated with prebored hole.
Wherein, as shown in Fig. 2, the adapter tube 2 is assembled in prebored hole 1 by the way of insertion, so that assembly precision obtains
To guarantee, the preferably ratio of the depth of prebored hole and pipe ends length is (28~35): 51, preferably (30~34): 51, it is more excellent
It is selected as 32:51.
In the present invention, to adapter tube caliber to be processed without particular/special requirement, but adapter tube caliber is smaller, and difficulty of processing is bigger,
Heretofore described tube sheet inclined tube boring method can be suitable for the drilling processing of steam generator drain nozzle, especially suitable
The tube sheet of the drilling processing of small-bore inclined tube for diameter less than 70mm, the evaporator 57mm of such as domestic imperial No.1 series of China is oblique
Pipe.
Preferably, the outer diameter of the pipe ends is less than the outer diameter of adapter tube main body.
Wherein, as shown in Fig. 2, by welding, so that the filling of weld seam 3 is between tube sheet and adapter tube main body.
In further preferred embodiment, in the welding process of adapter tube and tube sheet, need to be measured using measuring tool,
The angle of control adapter tube and tube sheet, in order to adjust welding parameter, welding direction in time, so that adapter tube remains pre- with tube sheet
Determine angle.
Wherein, the measuring tool is preferably angular templet, during welding adapter tube, need to constantly measure adapter tube and pipe
The angle of plate, such as: from starting to be welded to before leg is welded to half, every one circle angle of measurement of welding, when leg is welded to one
Half and its when the above thickness, every three to five circles angle of measurement.
Step 3, the actual angle of welding rear tube 2 and tube sheet is obtained.
The present inventor has found after study, although adapter tube and tube sheet are carried out in welding according to the predetermined angular in drawing,
But due to the influence of welding deformation, and in welding process angle measurement tool precision it is lower, weld rear tube and tube sheet angle
Degree certainly exists certain error, needs to carry out precise measurement to its actual angle.
Wherein, step 3 includes following sub-step:
Step 3-1 will take over and carry out centering processing with boring bar tool.
In the present invention, it is preferred to first fix the position of boring bar tool main shaft, the axis for then adjusting adapter tube carries out centering,
So that boring bar tool and adapter tube are coaxial.
Preferably, it measures and adjusts using the concentricity of dial gauge butt tube and boring bar tool, wherein centering precision
Less than 0.1mm.
Step 3-2 carries out virtual borehole processing by the angle after centering, obtains the actual corners of welding rear tube and tube sheet
Degree.
In the present invention, the boring procedure are as follows: will take over and Tube-sheet Welding, then bored from the end face of adapter tube, and edge first
Angled axis is inwardly processed, until passing through tube sheet secondary side.
Angle requirement is more the study found that the process of this drilling processing belongs to space touch system, when inclined hole is processed by the present inventor
Strictly, once there is deviation, secondary side hole site changes, and butt tube is generated irreversible influence, such as: tube sheet pore and
There is chiasma interference in final apertures, it is most likely that tube sheet is caused to scrap.
In the present invention, weld error and correct error will necessarily the processing of butt tube generate not inverse influence, therefore, this
Virtual borehole processing is carried out in invention preferably before drilling, to obtain the actual angle of welding rear tube and tube sheet, and then is guaranteed
The high-precision of following process.
Wherein, virtual borehole processing includes following sub-step:
Step 3-2-1, the spatial data of tube sheet target area 4 where obtaining final apertures.
In the present invention, as described in Figure 3, inclined hole to be drilled need to finally be beaten to (the secondary side table of tube sheet of tube sheet target area 4
Face), the selection be not arranged on the same straight line 1 points in tube sheet target area, preferably each of tube sheet target area as
Limit at least acquires a point, and obtains the spatial data of sampling site.
Wherein, the position to plane where target area where final apertures can be simulated by the spatial data of sampling site
It sets, i.e. the secondary side plane of tube sheet.
Step 3-2-2 obtains the spatial data of boring bar tool main shaft.
In the present invention, direction is axially extended on boring bar tool main shaft and arbitrarily chooses two points, obtains the sky of sampling site
Between coordinate data, and then simulate boring bar tool main shaft drilling when axis 5.Wherein, due to boring bar tool and adapter tube
Centering processing is carried out, the two is coaxial relation, therefore the axis of the boring bar tool main shaft simulated is the axis taken over.
Wherein, space coordinate measurement commonly used in the prior art system can be used in the acquisition of each sampling site spatial data
System, such as laser tracker measuring system or total station measuring system.
Step 3-2-3 obtains the actual angle of welding rear tube and tube sheet.
According to the position of plane where tube sheet target area where the boring bar tool main-shaft axis and final apertures of simulation, accurately
The actual angle of welding rear tube and tube sheet is measured, the angle of axis and plane is as simulated.
In the present invention, the method to be drilled by virtual manufacture can be determined accurately and be taken over after weld formation and tube sheet
Actual angle, the i.e. actual angle of the drilling processing of boring bar tool main shaft, provide accuracy guarantee for following process.
Step 4, final apertures is obtained to beat to the location information of target area on tube sheet.
Wherein, pass through the spatial data and boring bar tool main shaft of tube sheet target area where the final apertures of above-mentioned acquisition
Spatial data, the tomograph of the actual size of welding deformation rear tube and tube sheet is constructed, according to having obtained
Welding rear tube and tube sheet actual angle, acquisition processed according to actual angle after final apertures in tube sheet target area
Can location information carry out subsequent drilling processing using the angle with further judgement.
In the present invention, as shown in Figures 3 and 4, in the three-dimensional structure of the actual size for welding rear tube and tube sheet of building
In figure, the boring bar tool main-shaft axis simulated extends to the target area of tube sheet, and final apertures 6 can be obtained in target area
Location information.
Step 5, whether the location information of the final apertures obtained in judgment step 4 meets the requirements, to carry out following process.
A kind of preferred embodiment according to the present invention, when the location information of the final apertures obtained in step 4 is met the requirements
When, drilling processing processing is carried out according to the centering angle of boring bar tool in step 3-1.
In the present invention, by taking the imperial No.1 heap-type steam generator board group part weep hole of processing China as an example, such as Fig. 2 and Fig. 4
Shown, it is B that final apertures is required in drawing, which is at a distance from A, with tube sheet secondary side straight section at a distance from immediate tube sheet pore,；
It is B' that the final apertures of virtual manufacture, which is at a distance from A', with tube sheet secondary side straight section at a distance from immediate tube sheet pore,.
The drawing requirement that meets is A' >=A and B' >=B, and the drawing requirement that is unsatisfactory for is A'< A or B'< B.
In further preferred embodiment, when the difference of A' and A is greater than 4mm, and the difference of B' and B is greater than 4mm,
Subsequent drilling processing can directly be carried out；
As 0mm≤(A'-A)≤4mm, and when 0mm≤(B'-B)≤4mm, it can be adjusted and be added by the way of trim process
Work information；
When being unsatisfactory for drawing requirement (i.e. A'< A or B'< B), trim process can not be passed through.
A kind of preferred embodiment according to the present invention, as 2mm≤(A'-A)≤4mm, and when 2mm≤(B'-B)≤4mm,
Machining information can be adjusted by the way of trim process；
The trim process is to adjust under the premise of not changing boring bar tool main shaft angle in the tomograph of building
The position of whole boring bar tool main-shaft axis.
The present inventor is the study found that during processing, due to thickness of workpiece, dimensional tolerance consumption and centering deviation etc.
The influence of factor, will cause error accumulation, so that the size of actual processing has certain deviation relative to gross data.Cause
This needs to be finely adjusted processing, adjusts in tomograph as 2mm≤(A'-A)≤4mm, and when 2mm≤(B'-B)≤4mm
The position of whole boring bar tool main-shaft axis, reaches and meets drawing requirement, and then can directly carry out following process.
In further preferred embodiment, the boring bar tool main-shaft axis passes through whole translation downwards or puts down upwards
The mode of shifting adjusts.
Wherein, it reaffirms whether final apertures marginal position meets drawing requirement after adjusting main-shaft axis, is wanted if meeting
It asks, then carries out following process, if being unsatisfactory for requiring, repeat to adjust boring bar tool main-shaft axis position, until meeting the requirements.
A kind of preferred embodiment according to the present invention, as 0mm≤(A'-A) < 2mm, and when 0mm≤(B'-B) < 2mm,
In the tomograph of building, the angle of boring bar tool main shaft is adjusted under the premise of not changing boring bar tool main-shaft axis position
Degree.
Wherein, the angle of the main shaft increases or reduces according to actual needs.
In the present invention, it is preferred to can also be according to actual processing needs, by the angle for adjusting boring bar tool main shaft simultaneously
It spends and translates the method for axial location to adjust machining information.
A kind of preferred embodiment according to the present invention is unsatisfactory for drawing requirement as A'< A or B'< B, final apertures
Location information can not by trim process,
The angle of butt tube and tube sheet is needed to be corrected, then repetitive operation step 3 and 4, until meeting drawing requirement.
Wherein, as shown in Figure 2 and Figure 4, by taking the imperial No.1 heap-type steam generator board group part weep hole of processing China as an example, when
When A' is less than A, the angle for correcting adapter tube makes the angle of itself and tube sheet become smaller；When B' be less than B when, correct adapter tube angle make its with
The angle of tube sheet becomes larger.After having corrected angle, repetitive operation step 3 and 4 is judged again, is adjusted, until meeting can be into
The requirement of row following process.
A kind of preferred embodiment according to the present invention, the subsequent drilling processing use diameter to be less than final apertures hole first
The drill bit of diameter carries out primary drilling.
Wherein, according to primary drilling select bit diameter, in the tomograph of building obtain primary drilling beat to
The theoretical position information of tube sheet target area.
In further preferred embodiment, the bit diameter of the primary drilling is less than the aperture of prebored hole.
Preferably, the bore diameter of the primary drilling and the ratio in final apertures aperture are (8~12): 23, preferably (9~
11): 23, such as 10:23.
A kind of preferred embodiment according to the present invention, after primary drilling is drilled into tube sheet target area, to primary drilling
Actual location data measure and confirm.
In further preferred embodiment, compare the reason in the actual location data and tomograph of primary drilling
By position data,
As difference≤4mm of the two position, preferably≤2.0mm when, then to meet drawing requirement, can carry out in next step plus
Work；
As the difference > 4mm of the two position, then to be unsatisfactory for drawing requirement, need to be adjusted.
Wherein, the difference of the actual location data of the primary drilling and theoretical position data is that the center of physical location is inclined
Value from theoretical position center.
It is described to be adjusted to when preliminary bore position is unsatisfactory for drawing requirement in embodiment still more preferably
It is adjusted to first taking over the angle of tube sheet, then repeatedly step 3 and 4, up to meeting drawing requirement.
Wherein, by taking the imperial No.1 heap-type steam generator board group part weep hole of processing China as an example, when primary drilling actual bit
It sets center to deviate to close to tube sheet pore side, and when deviation theory place-centric > 4mm, makes adapter tube and pipe by correcting adapter tube
The angle of plate reduces to adjust；When primary drilling physical location center to close to tube sheet secondary side straight section deviate, and deviate reason
When being greater than > 4mm by place-centric, adjust the increase of the angle of adapter tube and tube sheet by correcting adapter tube.Wherein, it is adjusting
After angle, operating procedure 3~4 is repeated, until meeting drawing requirement.
A kind of preferred embodiment according to the present invention, the workpiece for meeting drawing requirement to primary drilling position data carry out
Reaming processing, to process final apertures.
In further preferred embodiment, the diameter and the diameter phase of final apertures of drill bit used are processed in the reaming
Together.
Embodiment
It is processed in imperial No.1 heap-type steam generator board group part drain nozzle hole to China using the method for the invention,
As shown in Fig. 1~7, wherein tube sheet quality of parent material is low-alloy steel, and drawing requirement: adapter tube is in 61 ° of angles with base material, hydrophobic to connect
Managing final aperture is Ф 23mm, and final apertures and the minimum range A at immediate tube sheet pore edge are 5mm, with tube sheet secondary side
The minimum range B of straight section is 46mm, and specific procedure of processing is as follows:
Step 1, tube sheet is placed on fixed bracket, adjusts on boring machine the angle of drill spindle and tube sheet and 61 °, processing is directly
Diameter is Ф 14mm, the prebored hole (as shown in Figure 2) of deep Ф 32mm, machining accuracy 0.05mm；
Step 2, drain nozzle lower end is inserted into prebored hole, wherein as shown in figure 5, drain nozzle uses solid bar,
It takes over lower end and prebored hole is interference fitted；Then welded, in welding process, be welded to since most leg be welded to half it
Before, every one circle of welding measures an angle, when leg is welded to half and its above thickness, every three to five using angular templet
A circle angle of measurement guarantees that angle meets 61 ° in welding process；
Step 3, whole tube sheet and drain nozzle will be welded as to be loaded on the rotating platform of boring machine, then passes through rotation
Drain nozzle axis and boring spindle are carried out centering by the rotation of platform direction, so that drill spindle and adapter tube are coaxial, using percentage
The concentricity of table butt tube and boring bar tool is measured and is adjusted, wherein centering precision controlling is within 0.1mm；
In the secondary side surface (as shown in figs. 1 and 3) of tube sheet, each quadrant area chooses a point, using laser tracker
Obtain four points spatial data be respectively (0,695.33,1312.81), (0,695.34, -1312.80), (0, -
695.34,1312.80),(0,-695.33,-1312.81)；Two points are arbitrarily chosen along axis extending direction on drill spindle,
Using laser tracker obtain two points spatial data be respectively (2004.012,426.77,265.603),
(2498.88,534.767,546.67)；
As shown in fig. 6, being generated in the secondary side plane of tube sheet according to the spatial data of secondary four points in side surface of tube sheet
The spatial value (0,0,0) of heart point, and then the secondary side plane of tube sheet simulated, according to the sky of two points on drill spindle
Between the drill spindle simulated of coordinate data, the practical angle for obtaining drain nozzle and tube sheet is 60.97 °；
Step 4, as shown in fig. 7, extending main shaft in the figure of the secondary side plane of tube sheet and drill spindle that simulation obtains
The secondary side surface of tube sheet is linked to, the location information of final apertures is obtained, as shown in figure 4, itself and immediate 7 edge of tube sheet pore
Distance A' be 23.764mm, with 8 distance B' of tube sheet secondary side straight section be 48.468mm；
By above-mentioned data it is found that the B' of the final hole site simulated is compared with the minimum 46mm of product drawing requirement, though
So meet drawing requirement, but difference is less than 4mm, it is contemplated that processing actual capabilities and theoretical conversion have small deviation (workpiece thickness
Spend the factors such as influence, dimensional tolerance consumption, centering deviation), drill spindle is finely adjusted under the premise of meeting drawing size；
In simulation drawing, the angle of boring bar tool main shaft is not changed, by the whole translation 1mm downwards of main shaft, after being adjusted
Final hole site, through measuring, the A' of final apertures adjusted is 21.688mm, B' 50.544mm, most with drawing requirement
The difference of small distance is respectively 16.688mm and 4.544mm, is all larger than 4mm, is met the requirements, can be according to main shaft position adjusted
It sets and is processed；
Step 5, virtual preparatory processing is carried out to drain nozzle according to the position of drill spindle on above-mentioned boring machine adjusted,
The gross data after getting to tube sheet secondary side using small drill bit Ф 10mm primary drilling is first obtained, practical preliminary brill is then carried out
Hole compares at the physical location center of obtained primary drilling with theoretical position, as the result is shown: physical location is to close to tube sheet
Secondary side straight section, deviation distance 5mm are apart from tube sheet secondary side straight section B value as that can make by this data mart modeling
45.544mm is unsatisfactory for drawing requirement less than the 46mm of drawing requirement, needs will take over and is adjusted to 61.2 ° with the angle of tube sheet, so
Repetitive operation step 3 and 4 afterwards until gross data meets drawing requirement, then carries out reaming processing；
The drill bit that diameter is Ф 23mm is selected to carry out reaming, processing obtains tube sheet weep hole.
Tube sheet weep hole after processing is detected, the results show that the angle of itself and tube sheet is 61.2 °, distance is most connect
The actual range at close tube sheet pore edge is 22.127mm, and the actual range apart from tube sheet secondary side straight section is
50.105mm being all satisfied drawing requirement.
Through counting, the precision of the tube sheet weep hole of actual processing is up to 100%, and does not cause to tube sheet and adapter tube irreversible
Damage, process a tube sheet component totally 2 weep holes used time be for 24 hours, efficiency is higher.
Embodiment 2
The present embodiment method therefor is similar to Example 1, and difference is, in step 4, the B' of the final hole site simulated
For 44mm, it is unsatisfactory for drawing requirement.At this time, it may be necessary to correct the angle of adapter tube and tube sheet, its angle is set to be adjusted to 61.3 °, then
Repetitive operation step 3 and 4, until the value of A' and B' meets drawing requirement.
In the description of the present invention, it should be noted that the instruction such as term " on ", "lower", "inner", "outside", "front", "rear"
Orientation or positional relationship be that the description present invention is merely for convenience of based on the orientation or positional relationship under working condition of the present invention
It is described with simplifying, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific orientation structure
It makes and operates, therefore be not considered as limiting the invention.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation " " phase
Even " " connection " should broadly understood, for example, it may be being fixedly connected, may be a detachable connection, or the connection of one is general
It is logical；It can be mechanical connection, be also possible to be electrically connected；It can be and be directly connected to, can also be indirectly connected with by intermediary, it can
To be the connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood with concrete condition
Concrete meaning in the present invention.
Combining preferred embodiment above, the present invention is described, but these embodiments are only exemplary
, only play the role of illustrative.On this basis, a variety of replacements and improvement can be carried out to the present invention, these each fall within this
In the protection scope of invention.
Claims (10)
1. a kind of method of inclined tube drilling processing on tube sheet, which is characterized in that the described method comprises the following steps:
Step 1, prebored hole (1) is processed on tube sheet；
Step 2, it will take over (2) insertion prebored hole (1), and be welded to connect；
Step 3, the actual angle of welding rear tube (2) and tube sheet is obtained；
Step 4, final apertures (6) are obtained to beat to the location information of target area on tube sheet；
Step 5, whether the location information of the final apertures (6) obtained in judgment step 4 meets the requirements, to carry out following process.
2. the method according to claim 1, wherein the prebored hole (1) is inclined hole, pre- processing in step 1
Before drilling, first the angle of tube sheet and boring bar tool main shaft is adjusted to predetermined angular；
Preferably, the prebored hole (1) is blind hole, and diameter is less than the aperture of final apertures (6).
3. the method according to claim 1, wherein the adapter tube (2) is matched with prebored hole (1) interference in step 2
It closes, so that adapter tube will not generate relative displacement with prebored hole.
4. the method according to claim 1, wherein during adapter tube (2) are welded, needing to use in step 2
The angle of measuring tool measurement adapter tube (2) and tube sheet, in order to adjust welding parameter in time, so that adapter tube (2) and tube sheet are kept
Predetermined angular.
5. the method according to claim 1, wherein step 3 includes following sub-step:
Step 3-1, will take over (2) and boring bar tool carries out centering processing；
Step 3-2 carries out virtual borehole processing by the angle after centering, obtains the actual angle of welding rear tube (2) and tube sheet.
6. according to the method described in claim 5, it is characterized in that, the step 3-2 the following steps are included:
Step 3-2-1 obtains drilling and beats to the spatial data of tube sheet target area (4)；
Step 3-2-2 obtains the spatial data of boring bar tool main shaft；
Step 3-2-3 obtains the actual angle of welding rear tube (2) and tube sheet.
7. according to the method described in claim 5, it is characterized in that, in step 5, when the position of the final apertures (6) obtained in step 4
When confidence breath is met the requirements, subsequent drilling processing processing is carried out according to the centering angle of boring bar tool in step 3-1；
When the location information of the final apertures (6) obtained in step 4 is unsatisfactory for requiring, place is finely adjusted to the position of boring bar tool
Reason or docking tube angulation are corrected processing.
8. the method according to the description of claim 7 is characterized in that the subsequent drilling processing uses diameter to be less than finally first
The drill bit in hole (6) aperture carries out primary drilling；
Preferably, before primary drilling, the gross data of its virtual manufacture is first obtained, is drilled into tube sheet target area in primary drilling
Behind domain, the actual location data of primary drilling is measured.
9. according to the method described in claim 8, it is characterized in that, by the actual location data of primary drilling and gross data into
Row compares,
As difference≤4mm of the two position, preferably≤2.0mm when, then to meet drawing requirement, next step processing can be carried out；
As the difference > 4mm of the two position, then to be unsatisfactory for drawing requirement, need to be adjusted.
10. according to the method described in claim 9, it is characterized in that, the workpiece for meeting drawing requirement to primary drilling expands
Hole machined, to process final apertures；
The diameter that drill bit used is processed in the reaming is identical as the diameter of final apertures.
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| CN111408899A (en) * | 2019-12-25 | 2020-07-14 | 武汉善福重型机床有限公司 | Method for processing inclined hole of stainless steel sheet |
| CN110480277B (en) * | 2019-08-30 | 2021-06-29 | 广船国际有限公司 | Machining process of nacelle rudder-steering mounting flange |
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