CN103707054B - A kind of Coordinated assembly method for three-docking-surfacseparating separating unit - Google Patents
A kind of Coordinated assembly method for three-docking-surfacseparating separating unit Download PDFInfo
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- CN103707054B CN103707054B CN201210380542.7A CN201210380542A CN103707054B CN 103707054 B CN103707054 B CN 103707054B CN 201210380542 A CN201210380542 A CN 201210380542A CN 103707054 B CN103707054 B CN 103707054B
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- 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
- B23P21/00—Machines for assembling a multiplicity of different parts to compose units, with or without preceding or subsequent working of such parts, e.g. with programme control
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Abstract
The invention belongs to assembly method, be specifically related to a kind of Coordinated assembly method for three-docking-surfacseparating separating unit: measure the height of flexible linear shaped charge protective cover, positional dissection rope protective cover assembly on frame: by the open-work on frame of the bottom outlet on protective cover assembly；Protective cover assembly is pulled down；Tapping on frame, installs steel-wire screw-socket；Frame positions butt tube assembly, and expansion tube is assembled in the position pressing butt tube assembly, adjust expansion tube insertion depth and reach to design requirement；Assembling expansion pipe guard, assembling limit, limit is measured；Expansion pipe guard location is stepped up；Pull down protective cover and flat tube, repeat step 2～step 4 step；Formal loading flexible linear shaped charge protective cover, flat tube and expansion pipe guard；The fitted position of repetition measurement protective cover, and join Data Comparison with trial assembly；Alignment pin, guide finger are installed, carry out examination docking with the section relating to separating.The effect of the present invention is: meets assembling intensity, harmony requirement, meets and launch needs.
Description
Technical field
The invention belongs to assembly method, dress coordinated by the segregation apparatus being specifically related to a kind of three interfaces
Method of completing the square.
Background technology
At present, only two interfaces on the segregation apparatus of domestic general Aerospace Products, i.e.
Can only control two section products to separate, separation point position is all in centre.Common separation device
Assembling all use traditional drilling and bolt connection, easily cause docking inharmonious, separate
The problems such as face inaccuracy.And the assembling of common separation device can only ensure first separation, it is difficult to
Solve repeatedly the difficult problem that head-shield separates.
Many interfaces segregation apparatus typically has three and above interface, uses and weakens groove control
Separation point position, as shown in Figure 1.Owing to the assembly precision of other parting surface can not be taken into account, therefore
Existing assembly technology is not used on this many interfaces segregation apparatus.This segregation apparatus
After upper and lower protective cover Product Assembly completes, also need to pull down before priming system is installed, it is therefore necessary to
Ensure no-float, harmony is required higher.The assembly method of many interfaces segregation apparatus,
On the one hand it is accurately positioned protective cover, it is ensured that flexible linear shaped charge or expansion tube are coordinated not occur with protective cover
Interfere, and protective cover gap uniformity, effectively play protective effect；On the other hand can control to cut
Weak groove and flexible linear shaped charge align precision and are not less than 0.5mm, it is ensured that clean cut separation.
Summary of the invention
It is an object of the invention to provide a kind of Coordinated assembly method for three-docking-surfacseparating separating unit.
The present invention is achieved in that a kind of Coordinated assembly method for three-docking-surfacseparating separating unit,
Comprise the steps:
Step one: measure the height of flexible linear shaped charge protective cover, positional dissection rope protective cover group on frame
Part, chooses 48 height measured after loading assembly, adjusts to height undulation values less than 0.2mm,
Ensure gapless after assembly loading；
Step 2: by the bottom outlet open-work on frame on flexible linear shaped charge protective cover assembly, and reaming；
Step 3: pulled down by flexible linear shaped charge protective cover assembly, by the bottom outlet reaming on assembly to design
Require diameter；
Step 4: tapping on frame, installs steel-wire screw-socket；
Step 5: position butt tube assembly on frame, and the position assembling pressing butt tube assembly is swollen
Tube expansion, adjusts expansion tube insertion depth and reaches to design requirement；
Step 6: assembling expansion pipe guard, assembling limit, limit is measured, and adjusts to each expansion tube and protects
Gap uniformity and less than 2mm between guard shield；
Step 7: by expansion pipe guard location clamping, by the bottom outlet in expansion pipe guard to
Open-work on frame, and reaming；
Step 8: pull down expansion pipe guard and flat tube, repeats step 2～step 4 step is straight
Join to the trial assembly completing whole device and tapping work；
Step 9: with reference to examination installation step, formal loads flexible linear shaped charge protective cover, flat tube and swollen
Tube expansion protective cover, mounting portion screw；
Step 10: the fitted position of repetition measurement flexible linear shaped charge protective cover, and join Data Comparison with trial assembly,
Deviation is not more than 0.2mm；Occur that deviation trial assembly the most again is joined, adjusting hole position；
Step 11: install alignment pin, guide finger, carries out examination docking with the section relating to separating.
A kind of Coordinated assembly method for three-docking-surfacseparating separating unit as above, wherein, described
Step one include that flexible linear shaped charge protective cover assembly is made up of protective cover and priming adapter two parts, dress
First two parts pin and bolt are connected before joining, form full circle, make flexible linear shaped charge protection
Shade assembly, measures the depth H of groove on protective cover height h, frame, records size, pressed by assembly
Quadrant positions, and trial assembly enters in the groove of frame, measures the flexible linear shaped charge protective cover upper end distance away from frame end face
L, can draw flexible linear shaped charge protective cover bottom surface and frame groove face by contrast tri-numerical value of h, H, L
Laminating gap, with guarantee flexible linear shaped charge protective cover assembling put in place, i.e. flexible linear shaped charge groove center with cut
Weak groove aligns, and by experimental study, three numerical value fluctuating margins are not more than 0.2mm and can protect
Card rigging position；
After tentatively having assembled, by the open-work on frame of the bottom outlet on flexible linear shaped charge protective cover, pull down and cut
Cut rope protective cover, tapping on frame, dress steel-wire screw-socket, ressemble flexible linear shaped charge protective cover assembly,
Align by quadrant, circumferentially choose at 6 and screw is installed, i.e. complete the dress of flexible linear shaped charge protective cover
Join.
A kind of Coordinated assembly method for three-docking-surfacseparating separating unit as above, wherein, described
Step 5 include: expansion pipe guard assembling before need install flat tube, adjust install after
Assembling expansion pipe guard, after trial assembly completes, is carried out in each section of expansion pipe guard one by one
Labelling, dismounting must reset by this labelling the most every time, pulls down expansion pipe guard and flat tube,
Drilling tapping on frame, installs steel-wire screw-socket, and reaming in expansion pipe guard, drilling work
Make and airtight checked after, flat tube, expansion pipe guard assembly are resetted, and spiral shell are installed
Nail, to verify the harmony of expansion pipe guard end-state.
A kind of Coordinated assembly method for three-docking-surfacseparating separating unit as above, wherein, described
Step 8 include: 8.1 flat tube sectional dimensions control
The pipe using Φ 13 × 0.85mm presses flat tube, and ratio of semi-minor axis length is
16.4:7=2.34, i.e. major axis are 2.34 times of minor axis length, cut in flat tube pressing process
Facial disfigurement is the most uneven: deformation maximum at the circular arc of surface, the most complicated, it not only holds
By the deformation force of self, within also thinning by tension beyond neutral line, neutral line by buckling
Thickness, so such as reaching the sectional dimension of Feng's karman curve requirement, either technique, or work
Installing meter, considers selecting resilience parameter to be required for emphasis；
Pipe cylindrical development size 41mm, the flat tube that design is given is understood by Theoretical Calculation
The length of run of major and minor axis be 2 × 3.5 × π+2 × (16.4-7) mm be also 41mm,
Under the conditions of such, flattening on formation theory of flat tube is feasible；
Finally determined the mould of groove type by test, control Feng karman curve R
The deformation at place, solves overproof problem, end face two terminal circle arc blow rule；
8.2 flat tube twists control
The longest 1 of Feng's karman curve flat tube is 4600mm, containing process allowance, due to length
Spend length, effective active length 2000mm of mould, inevitably occur that multistage is compressing
How overlength flat tube, ensure that the transition section twist that multistage is suppressed is less than
1.5mm/m becomes a compressing primary difficult problem；
In order to avoid during sectional forming, the upper and lower flat segments in changeover portion joint has obvious impression,
Process the hypotenuse transition region of certain length when making mould in upper mold, efficiently solve and take over mutually
The place of crossing leaves a difficult problem for impression；
In order to preferably control twist, after the last period Pipe forming, manufacture and design protection
Film frock, can effectively prevent after the compacting of section pipe time the change that causes because of internal pressurization of leading portion pipe
Shape；
8.3 flat tube contoured depressions control
Should ensure during compacting that the girth of pipe is constant before and after molding, ensure after molding up and down simultaneously
The contoured depressions of plane can not be more than 0.1mm, proposes the highest requirement, palpus to compressing
Carry out substantial amounts of test and technique groped, test and finally determine following control program:
8.3.1 tube interior pressurization: recessed in order to prevent light-wall pipe from producing under die pressure effect
Fall into, be passed through the water of certain pressure at tube interior by special testing stand, by liquid
Supporting role prevents the depression during pipe flattening, in finally determining pipe by repetition test
Force value is 8MPa～10MPa；
Flatten molding for the most times: finally determined employing by repetition test and repeatedly overturn pipe
Son 180 °, the process that 5～6 times are flattened molding, make steel pipe gradually deform, decrease one
Secondary compressing, metal has little time deformation, by the molding restraining the pipe upper surface caused at R
Depression；
8.4 flat tube brake forming technology
Brake forming Feng's karman curve after steel pipe flattening, Feng's karman curve flat tube ratio of semi-minor axis length
Being 16.4:7=2.34, owing to bending along long axis direction, therefore section deformation is the most uneven,
It is easier to wrinkling and deformation relative to along short-axis direction bending, realizes tube bending in which way
Feng's karman curve shape and wall light wall pipe BENDING PROCESS springback calculation problem become brake forming
Key and difficult point；
By Feng's each bending point of karman curve Equation for Calculating and angle, use special technological equipment
It is curved, is verified by inspection template, solve and ensure that shape, dimensional requirement,
It is effectively controlled flatness, twist, deflection, it is to avoid crackle, wrinkling, ovality
Overproof defect, revises after technique uses predetermined length bending, directional curvature and bending meanwhile,
Mainly pattern line tempte correction, method achieves the brake forming of Feng's karman curve flat tube,
Mainly take following technological measure:
A. in order to avoid wrinkling when flat tube bends, it is ensured that the twist of bending flat pipe, design
Having manufactured bending mould with groove, the width of groove is identical with flat tube minor axis dimension；
The most accurately calculate rebound value, consider the modulus of elasticity of tubing, pipe wall thickness and
By test and Theoretical Calculation, the arc length factor of sweep, finally determines that mold profile is radius
1/4 circular arc for 1m；
C. due in BENDING PROCESS pipe length change include stretching and bending elongation, its
Numerical value changes with the material of pipe, size, bending diameter, angle of bend, and Feng's karman curve is flat
Flat pipe have employed segmentation and bends the method that instead of first order buckling, and the entirety model that reclines is modified
Molding, it is achieved that the brake forming of Feng's karman curve flat tube；
Gusset plate is riveted complete before flat tube assembling, and done airtight inspection, for ensureing not damage
Body, assembles to file the manufactured head on gusset plate and repaiies to less than surface 0.1mm, before flat tube is installed,
At quadrant, first position butt tube assembly, trial assembly flat tube on the basis of butt tube assembly, assembling
Time first fill on the right side of flat tube, it is ensured that insert distance not less than 12mm, left side flat tube with dock
Pipe assembly is compared, it is ensured that butt tube assembly rigging position is correct, insertion on the left of flat tube
Being adjusted to 10mm to 12mm, unnecessary place carries out file and repaiies, and this kind of assembly method is effectively ensured
The docking length of flat tube and the rigging position of butt tube assembly.
The present invention significantly provides the benefit that: defines complete many interfaces segregation apparatus and coordinates
Assembly method is theoretical, each several part assembling control such as including expansion tube, protective cover, flexible linear shaped charge protective cover
The detailed process parameter of system.This kind of assembly method disclosure satisfy that assembling intensity, harmony requirement,
And by emission test, separation accuracy is fully able to meet launches needs.It addition, this kind of assembling
Method may also reach up certain airtight requirement, in the case of external pressure 0.35MPa keeps 60min,
Internal pressure rises above 0.02MPa, and locally leak rate is less than 1 × 10-7Pa.m3/s.
Accompanying drawing explanation
Fig. 1 is three interface segregation apparatus product profiles.
In figure: 1. frame, 2. flexible linear shaped charge protective cover assembly, 3. flat tube, 4. expansion pipe guard,
5. screw.
Detailed description of the invention
A kind of Coordinated assembly method for three-docking-surfacseparating separating unit, comprises the steps:
Step one: measure the height of flexible linear shaped charge protective cover, positional dissection rope protective cover group on frame
Part, chooses 48 height measured after loading assembly, adjusts to height undulation values less than 0.2mm,
Ensure gapless after assembly loading；
Flexible linear shaped charge protective cover assembly is made up of protective cover and priming adapter two parts, first will before assembling
Two parts pin and bolt connect, and form full circle, make flexible linear shaped charge protective cover assembly.
Measure the depth H of groove on protective cover height h, frame, record size.Assembly is pressed quadrant location,
Trial assembly enters in the groove of frame, measures protective cover upper end distance L away from frame end face.By contrast h, H,
Tri-numerical value of L can draw the laminating gap of protective cover bottom surface and frame groove face, to guarantee protection
Cover assembling puts in place, i.e. flexible linear shaped charge groove center aligns with weakening groove.By experimental study, three
Numerical fluctuations amplitude is not more than 0.2 can ensure rigging position.
After tentatively having assembled, by the open-work on frame of the bottom outlet on protective cover, pull down protective cover,
Tapping on frame, dress steel-wire screw-socket.Ressemble flexible linear shaped charge protective cover assembly, align by quadrant,
Circumferentially choose at 6 and screw is installed, i.e. complete the assembling of flexible linear shaped charge protective cover.
Step 2: by the open-work on frame of the bottom outlet on protective cover assembly, and reaming；
Step 3: pulled down by protective cover assembly, requires straight by the bottom outlet reaming on assembly to design
Footpath；
Step 4: tapping on frame, installs steel-wire screw-socket；
Step 5: position butt tube assembly on frame, and the position assembling pressing butt tube assembly is swollen
Tube expansion, adjusts expansion tube insertion depth and reaches to design requirement；
Need flat tube is installed before expansion pipe guard assembling, adjust assembling protection after installing
Cover.Protective cover needs assembling limit, limit to debug, and should ensure each section of gap uniformity, adjust each again
Between Duan, gap is less than 2mm.After trial assembly completes, each section of protective cover is marked one by one,
Dismounting must reset by this labelling the most every time.Pull down protective cover and flat tube, frame is made
Hole tapping, installs steel-wire screw-socket, and reaming on protective cover.Drilling work and airtight check out
Cheng Hou, resets the assembly such as flat tube, protective cover, and installs screw, to verify that protective cover is
The harmony of whole state.
Step 6: assembling expansion pipe guard, assembling limit, limit is measured, is adjusted between each protective cover
Gap uniformity and less than 2mm；
Step 7: by the clamping of expansion pipe guard location, by the bottom outlet on protective cover on frame thoroughly
Hole, and reaming；
Step 8: pull down protective cover and flat tube, repeats step 2～step 4 walks until completing
The trial assembly of whole device is joined and tapping work；
8.1 flat tube sectional dimensions control
The pipe using (Φ 13 × 0.85) mm presses flat tube, and ratio of semi-minor axis length is
16.4:7=2.34, i.e. major axis are 2.34 times of minor axis length, cut in flat tube pressing process
Facial disfigurement is the most uneven: deformation maximum at the circular arc of surface, the most complicated.It not only holds
By the deformation force of self, within also thinning by tension beyond neutral line, neutral line by buckling
Thickness, so such as reaching the sectional dimension of Feng's karman curve requirement, either technique, or work
Installing meter, considers selecting resilience parameter to be required for emphasis.
Pipe cylindrical development size 41mm, the flat tube that design is given is understood by Theoretical Calculation
The length of run of major and minor axis be 2 × 3.5 × π+2 × (16.4-7) be also 41mm, so
Under conditions of flattening on formation theory of flat tube be feasible.
Finally determined the shaping dies of groove type by test, control Feng karman curve R
The deformation at place, solves overproof problem, end face two terminal circle arc blow rule.
8.2 flat tube twists control
The longest 1 of Feng's karman curve flat tube is 4600mm (containing process allowance), due to length
Spend length, effective active length 2000mm of mould, inevitably occur that multistage is compressing
Overlength flat tube.How to ensure that the transition section twist that multistage is suppressed is less than 1.5mm/m
Become a compressing primary difficult problem.
In order to avoid during sectional forming, the upper and lower flat segments in changeover portion joint has obvious impression,
Process the hypotenuse transition region of certain length when making mould in upper mold, efficiently solve and take over mutually
The place of crossing leaves a difficult problem for impression.
In order to preferably control twist, after the last period Pipe forming, manufacture and design protection
Film frock, can effectively prevent after the compacting of section pipe time the change that causes because of internal pressurization of leading portion pipe
Shape.
8.3 flat tube shaped depressions control
Should ensure during compacting that the girth of pipe is constant before and after molding, after ensureing to shape up and down simultaneously
The contoured depressions of plane can not be more than 0.1mm, proposes the highest requirement, palpus to compressing
Carry out substantial amounts of test and technique is groped.Test and finally determine following control program:
8.3.1 tube interior pressurization: recessed in order to prevent light-wall pipe from producing under die pressure effect
Fall into, be passed through the water of certain pressure at tube interior by special testing stand, by liquid
Supporting role prevents the depression during pipe flattening.In finally determining pipe by repetition test
Force value is 8MPa～10MPa；
Flatten molding for the most times: finally determined employing by repetition test and repeatedly overturn pipe
Son 180 °, the process that 5～6 times are flattened molding, make steel pipe gradually deform, decrease one
Secondary compressing, metal has little time deformation, shaping by the contained pipe upper surface caused at R
Depression.
8.4 flat tube bending forming technology
Bending forming Feng's karman curve after steel pipe flattening, Feng's karman curve flat tube ratio of semi-minor axis length
Being 16.4:7=2.34, owing to bending along long axis direction, therefore section deformation is the most uneven,
It is easier to wrinkling and deformation relative to along short-axis direction bending.Realize tube bending in which way
Feng's karman curve shape and the problem such as wall light wall pipe BENDING PROCESS springback calculation become bending forming
Key and difficult point.
By Feng's each bending point of karman curve Equation for Calculating and angle, use special technological equipment
It is curved, is verified by inspection template, solve and ensure that shape, dimensional requirement,
It is effectively controlled flatness, twist, deflection, it is to avoid crackle, wrinkling, ovality
The defect such as overproof.Meanwhile, repair after technique using predetermined length bending, directional curvature and bending
Just method such as (mainly pattern line tempte correction) achieves the bending of Feng's karman curve flat tube
Molding.Mainly take following technological measure:
A. in order to avoid wrinkling when flat tube bends, it is ensured that the twist of bending flat pipe, design
Having manufactured bending mould with groove, the width of groove is identical with flat tube minor axis dimension；
B. precise art rebound value.Consider the modulus of elasticity of tubing, pipe wall thickness and
By test and Theoretical Calculation, the factors such as the arc length of sweep, finally determine that mold profile is half
Footpath is 1/4 circular arc of 1m；
C. due in BENDING PROCESS pipe length change include stretching and bending elongation, its
Numerical value changes, Feng's karman curve with the material of pipe, size, bending diameter, angle of bend etc.
Flat tube have employed segmentation and bends the method that instead of first order buckling, and the entirety model that reclines is repaiied
Just shape, it is achieved that the brake forming of Feng's karman curve flat tube.
Gusset plate is riveted complete before flat tube assembling, and done airtight inspection.For ensureing not damage
Body, assembles to file the manufactured head on gusset plate and repaiies to less than surface 0.1mm.Before flat tube is installed,
At quadrant, first position butt tube assembly, trial assembly flat tube on the basis of butt tube assembly.Assembling
Time first fill on the right side of flat tube, it is ensured that insert distance not less than 12, left side flat tube and butt tube group
Part is compared, it is ensured that butt tube assembly rigging position is correct, and on the left of flat tube, insertion adjusts
To 10 to 12, unnecessary place carries out file and repaiies.This kind of assembly method has been effectively ensured the right of flat tube
Spreading degree and the rigging position of butt tube assembly.
Step 9: with reference to examination installation step, formal loads flexible linear shaped charge protective cover, flat tube and swollen
Tube expansion protective cover, mounting portion screw；
Step 10: the fitted position of repetition measurement protective cover, and join Data Comparison with trial assembly, deviation is not
More than 0.2mm；Occur that deviation trial assembly the most again is joined, adjusting hole position；
Step 11: install alignment pin, guide finger, carries out examination docking with the section relating to separating.
In the most each step, unspecified step all uses prior art to realize.
Claims (3)
1. a Coordinated assembly method for three-docking-surfacseparating separating unit, it is characterised in that: under including
State step:
Step one: measure the height of flexible linear shaped charge protective cover, positional dissection rope protective cover group on frame
Part, chooses at 48 and measures and load the height after assembly, adjusts to height undulation values and is less than
0.2mm, it is ensured that gapless after assembly loading；
Flexible linear shaped charge protective cover assembly is made up of protective cover and priming adapter two parts, first will before assembling
Two parts pin and bolt connect, and form full circle, make flexible linear shaped charge protective cover assembly,
Step 2: by the bottom outlet open-work on frame on flexible linear shaped charge protective cover assembly, and reaming；
Step 3: pulled down by flexible linear shaped charge protective cover assembly, by the bottom outlet reaming on assembly to design
Require diameter；
Step 4: tapping on frame, installs steel-wire screw-socket；
Step 5: position butt tube assembly on frame, and the position assembling pressing butt tube assembly is swollen
Tube expansion, adjusts expansion tube insertion depth and reaches to design requirement；
Step 6: need to install flat tube before expansion pipe guard assembling, adjusts and fills after installing
Joining expansion pipe guard, assembling limit, limit is measured, and adjusts gap uniformity between each expansion pipe guard
And less than 2mm；
Step 7: by expansion pipe guard location clamping, by the bottom outlet in expansion pipe guard to
Open-work on frame, and reaming；
Step 8: pull down expansion pipe guard and flat tube, repeat step 2～step 4 until
The trial assembly completing whole device is joined and tapping work；
Step 9: with reference to examination installation step, formal loads flexible linear shaped charge protective cover, flat tube and swollen
Tube expansion protective cover, mounting portion screw；
Step 10: the fitted position of repetition measurement flexible linear shaped charge protective cover, and join Data Comparison with trial assembly,
Deviation is not more than 0.2mm；Occur that deviation trial assembly the most again is joined, adjusting hole position；
Step 11: install alignment pin, guide finger, carries out examination docking with the section relating to separating.
2. a kind of Coordinated assembly method for three-docking-surfacseparating separating unit as claimed in claim 1,
It is characterized in that: described step one includes measuring groove on flexible linear shaped charge protective cover height h, frame
Depth H, records size, and assembly is pressed quadrant location, and trial assembly enters in the groove of frame, measures cutting
Rope protective cover upper end distance L away from frame end face, by contrast tri-numerical value of h, H, L
Draw the laminating gap of flexible linear shaped charge protective cover bottom surface and frame groove face, to guarantee that flexible linear shaped charge protective cover fills
Be fitted on position, i.e. flexible linear shaped charge groove center aligns with weakening groove, by experimental study, and three numerical value
Fluctuating margin is not more than 0.2mm can ensure rigging position.
3. a kind of Coordinated assembly method for three-docking-surfacseparating separating unit as claimed in claim 2,
It is characterized in that: described step 8 includes: 8.1 flat tube sectional dimensions control
The pipe using Φ 13 × 0.85mm presses flat tube, and ratio of semi-minor axis length is
16.4:7=2.34, i.e. major axis are 2.34 times of minor axis length, cut in flat tube pressing process
Facial disfigurement is the most uneven: deformation maximum at the circular arc of surface, the most complicated, it not only holds
By the deformation force of self, within also thinning by tension beyond neutral line, neutral line by buckling
Thickness, so such as reaching the sectional dimension of Feng's karman curve requirement, either technique, or work
Installing meter, considers selecting resilience parameter to be required for emphasis；
Pipe cylindrical development size 41mm, the flat tube that design is given is understood by Theoretical Calculation
The length of run of major and minor axis be 2 × 3.5 × π+2 × (16.4-7) mm be also 41mm,
Under the conditions of such, flattening on formation theory of flat tube is feasible；
Finally determined the mould of groove type by test, control Feng karman curve R
The deformation at place, solves overproof problem, end face two terminal circle arc blow rule；
8.2 flat tube twists control
The longest 1 of Feng's karman curve flat tube is 4600mm, containing process allowance, due to length
Spend length, effective active length 2000mm of mould, inevitably occur that multistage is compressing
How overlength flat tube, ensure that the transition section twist that multistage is suppressed is less than 1.5mm/m
Become a compressing primary difficult problem；
In order to avoid during sectional forming, the upper and lower flat segments in changeover portion joint has obvious impression,
Process the hypotenuse transition region of certain length when making mould in upper mold, efficiently solve and take over mutually
The place of crossing leaves a difficult problem for impression；
In order to preferably control twist, after the last period Pipe forming, manufacture and design protection
Film frock, can effectively prevent after the compacting of section pipe time the change that causes because of internal pressurization of leading portion pipe
Shape；
8.3 flat tube contoured depressions control
Should ensure during compacting that the girth of pipe is constant before and after molding, ensure after molding up and down simultaneously
The contoured depressions of plane can not be more than 0.1mm, proposes the highest requirement, palpus to compressing
Carry out substantial amounts of test and technique groped, test and finally determine following control program:
8.3.1 tube interior pressurization: recessed in order to prevent light-wall pipe from producing under die pressure effect
Fall into, be passed through the water of certain pressure at tube interior by special testing stand, by liquid
Supporting role prevents the depression during pipe flattening, in finally determining pipe by repetition test
Force value is 8MPa～10MPa；
Flatten molding for the most times: finally determined employing by repetition test and repeatedly overturn pipe
Son 180 °, the process that 5～6 times are flattened molding, make steel pipe gradually deform, decrease one
Secondary compressing, metal has little time deformation, by the molding restraining the pipe upper surface caused at R
Depression；
8.4 flat tube brake forming technology
Brake forming Feng's karman curve after steel pipe flattening, Feng's karman curve flat tube ratio of semi-minor axis length
Being 16.4:7=2.34, owing to bending along long axis direction, therefore section deformation is the most uneven,
It is easier to wrinkling and deformation relative to along short-axis direction bending, realizes tube bending in which way
Feng's karman curve shape and wall light wall pipe BENDING PROCESS springback calculation problem become brake forming
Key and difficult point；
By Feng's each bending point of karman curve Equation for Calculating and angle, use special technological equipment
It is curved, is verified by inspection template, solve and ensure that shape, dimensional requirement,
It is effectively controlled flatness, twist, deflection, it is to avoid crackle, wrinkling, ovality
Overproof defect, revises after technique uses predetermined length bending, directional curvature and bending meanwhile,
Mainly pattern line tempte correction, method achieves the brake forming of Feng's karman curve flat tube,
Mainly take following technological measure:
A. in order to avoid wrinkling when flat tube bends, it is ensured that the twist of bending flat pipe, design
Having manufactured bending mould with groove, the width of groove is identical with flat tube minor axis dimension；
The most accurately calculate rebound value, consider the modulus of elasticity of tubing, pipe wall thickness and
By test and Theoretical Calculation, the arc length factor of sweep, finally determines that mold profile is radius
1/4 circular arc for 1m；
C. due in BENDING PROCESS pipe length change include stretching and bending elongation, its
Numerical value changes with the material of pipe, size, bending diameter, angle of bend, and Feng's karman curve is flat
Flat pipe have employed segmentation and bends the method that instead of first order buckling, and the entirety model that reclines is modified
Molding, it is achieved that the brake forming of Feng's karman curve flat tube；
Gusset plate is riveted complete before flat tube assembling, and done airtight inspection, for ensureing not damage
Body, assembles to file the manufactured head on gusset plate and repaiies to less than surface 0.1mm, before flat tube is installed,
At quadrant, first position butt tube assembly, trial assembly flat tube on the basis of butt tube assembly, assembling
Time first fill on the right side of flat tube, it is ensured that insert distance not less than 12mm, left side flat tube with dock
Pipe assembly is compared, it is ensured that butt tube assembly rigging position is correct, insertion on the left of flat tube
Being adjusted to 10mm to 12mm, unnecessary place carries out file and repaiies, and this kind of assembly method is effectively ensured
The docking length of flat tube and the rigging position of butt tube assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210380542.7A CN103707054B (en) | 2012-10-09 | 2012-10-09 | A kind of Coordinated assembly method for three-docking-surfacseparating separating unit |
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| CN105486523B (en) * | 2014-10-13 | 2018-03-16 | 北京宇航系统工程研究所 | A kind of mild detonating fuze separator allowance test wire examination method |
| CN107521723A (en) * | 2017-08-25 | 2017-12-29 | 北京电子工程总体研究所 | A kind of linear firer's separator |
| CN111975287B (en) * | 2020-07-23 | 2022-03-15 | 哈尔滨电气动力装备有限公司 | Mounting process for hub cap of impeller of nuclear main pump |
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| US5467517A (en) * | 1992-05-29 | 1995-11-21 | Nippondenso Co., Ltd. | Method and system for fitting work-pieces |
| CN1915583A (en) * | 2006-08-31 | 2007-02-21 | 中国南方航空工业有限责任公司 | Rise and fall assembly rack for engine |
| CN102152162A (en) * | 2011-01-25 | 2011-08-17 | 北京灿烂阳光科技发展有限公司 | Portable spliced guide rail, butt joint method and work fixture |
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| JP2826544B2 (en) * | 1996-10-31 | 1998-11-18 | 新キャタピラー三菱株式会社 | Bearing assembly device, assembly jig and assembly robot |
| JP2007061948A (en) * | 2005-08-30 | 2007-03-15 | Aichi Mach Ind Co Ltd | Line system |
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| US5467517A (en) * | 1992-05-29 | 1995-11-21 | Nippondenso Co., Ltd. | Method and system for fitting work-pieces |
| CN1915583A (en) * | 2006-08-31 | 2007-02-21 | 中国南方航空工业有限责任公司 | Rise and fall assembly rack for engine |
| CN102152162A (en) * | 2011-01-25 | 2011-08-17 | 北京灿烂阳光科技发展有限公司 | Portable spliced guide rail, butt joint method and work fixture |
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