CN103707054A - Coordinated assembly method for three-docking-surface separating unit - Google Patents
Coordinated assembly method for three-docking-surface separating unit Download PDFInfo
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- CN103707054A CN103707054A CN201210380542.7A CN201210380542A CN103707054A CN 103707054 A CN103707054 A CN 103707054A CN 201210380542 A CN201210380542 A CN 201210380542A CN 103707054 A CN103707054 A CN 103707054A
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Abstract
The invention belongs to an assembly method and particularly relates to a coordinated assembly method for a three-docking-surface separating unit. The method includes: 1, measuring the height of a cutting rope guard and positioning a cutting rope guard component on a frame; 2, piercing the frame to form holes according to bottom holes of the guard component, and expanding the holes; 3, removing the guard component; 4, tapping the frame and mounting wire thread inserts; 5, positioning a docking pipe component on the frame, mounting an expansion pipe at the position corresponding to the docking pipe component, and regulating the inserted depth of the expansion pipe to meet the design requirements; 6, fitting an expansion pipe guard, and measuring while fitting; 7, positioning and tightening the expansion pipe guard; 8, removing the guard and a flat pipe, and repeating the steps of two to four until trail assembly and tapping of the whole separating unit are finished; 9, formally mounting the cutting rope guard, the flat pipe and the expansion pipe guard; 10, re-measuring the fitting sizes of the guards, and comparing the sizes to trial assembly data; 11, mounting positioning pins and guide pins, and performing trial docking with separation related segments. The coordinated assembly method for the three-docking-surface separating unit has the advantages that the requirements on assembly strength and coordination are met and the launching needs are met.
Description
Technical field
The invention belongs to assembly method, be specifically related to a kind of separator Coordinative assembling method of three interfaces.
Background technology
At present, only have two interfaces on the separator of domestic general Aerospace Products, can only control two portion's section products and carry out separation, separation point position is all in centre.The assembling of common separation device all adopts traditional drilling and bolt connection, easily causes the problems such as docking is inharmonious, parting surface inaccuracy.And the assembling of common separation device can only guarantee first separation, be difficult to solve a repeatedly difficult problem for head-shield separation.
Multipair junction separator generally has three and above interface, adopts and weakens groove control separation point position, as shown in Figure 1.Owing to can not taking into account the assembly precision of other parting surface, therefore existing assembly technology cannot be used on this multipair junction separator.After the upper and lower protective cover Product Assembly of this separator completes, before priming system is installed, also need to pull down, therefore must guarantee no-float, harmony is had relatively high expectations.The assembly method of multipair junction separator, accurately locates protective cover on the one hand, guarantee that flexible linear shaped charge or expansion tube and protective cover coordination do not interfere, and protective cover gap is even, effectively brings into play protective effect; Can control on the other hand and weaken groove and flexible linear shaped charge and align precision and be not less than 0.5mm, guarantee accurate separation.
Summary of the invention
A kind of separator Coordinative assembling method that the object of this invention is to provide three interfaces.
The present invention is achieved in that a kind of separator Coordinative assembling method of three interfaces, comprises the steps:
Step 1: measure the height of flexible linear shaped charge protective cover, positional dissection rope protective cover assembly, chooses 48 point measurements and pack the height after assembly on frame, is adjusted to height fluctuation value and is less than 0.2mm, and Assurance component packs rear gapless into;
Step 2: press bottom outlet on protective cover assembly to open-work on frame, and reaming;
Step 3: protective cover assembly is pulled down, by the bottom outlet reaming on assembly to designing requirement diameter;
Step 4: tapping on frame, steel-wire screw-socket is installed;
Step 5: locate butt tube assembly on frame, and press the position assembling expansion tube of butt tube assembly, adjust expansion tube insertion depth and reach designing requirement;
Step 6: assembling expansion tube protective cover, assembling limit, limit is measured, and is adjusted between each protective cover gap evenly and is less than 2mm;
Step 7: expansion tube protective cover location is clamped, by the bottom outlet on protective cover to open-work on frame, and reaming;
Step 8: pull down protective cover and flat tube, repeating step two～step 4 step is until complete that the trial assembly of whole device is joined and tapping work;
Step 9: with reference to examination installation step, formally pack flexible linear shaped charge protective cover, flat tube and expansion tube protective cover into, 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 deviation again trial assembly join, adjusting hole position;
Step 11: alignment pin, guide finger are installed, and are related to separated portion's section and try to dock.
The separator Coordinative assembling method of a kind of three interfaces as above, wherein, described step 1 comprises that flexible linear shaped charge protective cover assembly is comprised of protective cover and priming adapter two parts, before assembling, first two parts are connected with bolt with pin, form full circle, make it to become flexible linear shaped charge protective cover assembly, measuring and protecting cover height h, the depth H of groove on frame, record size, assembly is pressed to quadrant location, trial assembly enters in the groove of frame, measuring and protecting cover upper end is apart from the distance L of frame end face, by contrast h, H, the laminating gap that tri-numerical value of L can draw protective cover bottom surface and frame groove face, to guarantee that protective cover is seated, be that flexible linear shaped charge groove center aligns with weakening groove, by experimental study, three numerical value fluctuating ranges are not more than 0.2 and can guarantee rigging position,
After preliminary assembling, by the bottom outlet on protective cover, to open-work on frame, pull down protective cover; tapping on frame, dress steel-wire screw-socket, ressemble flexible linear shaped charge protective cover assembly, by quadrant, aligns; on circumference, choose 6 mounting screws, complete the assembling of flexible linear shaped charge protective cover.
The separator Coordinative assembling method of a kind of three interfaces as above, wherein, described step 5 comprises: before the assembling of expansion tube protective cover, need to install flat tube, adjustment installs rear assembling protective cover, protective cover needs the debugging of assembling limit, limit, should guarantee that each intersegmental gap is even, adjust again gap between each section and be less than 2mm, after trial assembly completes, on each segment protect cover, carry out one by one mark, later each dismounting must reset by this mark, pull down protective cover and flat tube, drilling tapping on frame, steel-wire screw-socket is installed, and reaming on protective cover, after drilling work and airtight having checked, by flat tube, the assemblies such as protective cover reset, and mounting screw, harmony with checking protective cover end-state.
The separator Coordinative assembling method of a kind of three interfaces as above, wherein, described step 8 comprises: 8.1 flat tube sectional dimensions are controlled
Adopt the pipe of (Φ 13 * 0.85) mm to press flat tube, ratio of semi-minor axis length is 16.4:7=2.34, be that major axis is 2.34 times of minor axis length, the distortion of flat tube pressing process middle section is very inhomogeneous: the distortion of surperficial circular arc place is maximum, also the most complicated, it not only bears the deformation force of self, also to be subject to neutral line tension attenuation in addition, neutral line with interior pressurized thickening, so as reach the sectional dimension of Feng's karman curve requirement, no matter be technique, or Fixture Design, is selecting resilience parameter all to need emphasis to consider
By theory, calculate known pipe cylindrical development size 41mm, the length of run that designs given flat tube major and minor axis is that 2 * 3.5 * π+2 * (16.4-7) are also 41mm, under such condition, on the flattening formation theory of flat tube, is feasible,
By testing the shaping dies of finally having determined groove type, controlled the distortion at Feng's karman curve R place, solved overproof problem, end face two terminal circle arc blow rule,
8.2 flat tube twists are controlled
Feng's karman curve flat tube the longest 1 is for 4600mm(is containing process allowance), because length is long, the effective active length 2000mm of mould, inevitably there is the compressing overlength flat tube of multistage, the transition section twist that how to guarantee multistage compacting is no more than 1.5mm/m becomes a compressing primary difficult problem
During for fear of sectional forming, the upper and lower flat segments in changeover portion joint has obvious impression, processes the hypotenuse transition region of certain length when making mould at patrix, efficiently solves the difficult problem that the transition position that joins leaves impression,
In order better to control twist, after the last period Pipe forming, manufactured and designed diaphragm frock, the distortion that in the time of can effectively preventing section pipe compacting below, leading portion pipe causes because of internal pressurization,
8.3 flat tube shaped depressions are controlled
The girth that should guarantee moulding front and back pipe during compacting is constant, guarantee that after being shaped, the moulding depression of upper lower plane can not be greater than 0.1mm simultaneously, to compressing, proposed very high requirement, must carry out a large amount of tests and technique is groped, following control program has finally been determined in test:
8.3.1 tube interior pressurization: in order to prevent that light-wall pipe from producing depression under die pressure effect, by special-purpose testing stand, at tube interior, passed into the water of certain pressure, supporting role by liquid prevents the depression in pipe flattening process, by repetition test, finally determines that overpressure value is 8MPa～10MPa;
8.3.2 flatten moulding for many times: by repetition test, finally determined and adopted 180 °, the pipe of repeatedly overturning, flattened the process of moulding, steel pipe is out of shape gradually for 5～6 times, reduced once compressing, metal has little time distortion, and R place is subject to restrain the shaped depression of the pipe upper surface of causing
8.4 flat tube bending forming technology
Bending forming Feng karman curve after steel pipe flattens, Feng's karman curve flat tube ratio of semi-minor axis length is 16.4:7=2.34, due to crooked along long axis direction, therefore section deformation is very inhomogeneous, with respect to the easier wrinkling and distortion along short-axis direction bending, realizing in which way the problems such as Feng's karman curve shape of tube bending and wall light wall pipe BENDING PROCESS springback calculation becomes key and the difficult point of bending forming
By Feng's karman curve equation, calculate each bending point and angle, use special technological equipment to carry out bending, by inspection template, verify, solve and guaranteed shape, dimensional requirement, flatness, twist, deflection have effectively been controlled, the defects such as crackle, wrinkling, ovality is overproof have been avoided, simultaneously, in technique, adopt predetermined length bending, directional curvature and the crooked rear brake forming that methods such as (being mainly the correction of pattern line tempte) has realized Feng's karman curve flat tube of revising, mainly taked following technological measure:
Wrinkling during a. for fear of flat tube bending, the twist of assurance bending flat pipe, has manufactured and designed the bending mould with groove, and the width of groove is identical with flat tube minor axis dimension;
B. accurate technology rebound value, considers the factors such as arc length of modulus of elasticity, pipe wall thickness and the sweep of tubing, by test and theoretical calculating, finally determines that mold profile is that radius is 1/4 circular arc of 1m;
C. the length variations due to pipe in BENDING PROCESS comprises stretching and bending elongation, its numerical value changes with the material of pipe, size, bending diameter, angle of bend etc., Feng's karman curve flat tube has adopted segmentation bending to replace the method for first order buckling, integral plaster is revised shaping by model, realized the brake forming of Feng's karman curve flat tube
Before flat tube assembling, gusset plate has been riveted complete, and do airtight inspection, for guaranteeing not damage body, assembling repaiies the manufactured head file on gusset plate to lower than surperficial 0.1mm, install before flat tube, first at location, quadrant place butt tube assembly, take butt tube assembly as benchmark trial assembly flat tube, during assembling, first fill flat tube right side, guarantee to insert distance and be not less than 12, left side flat tube and butt tube assembly are compared, guarantee butt tube component assembling correct position, flat tube left side insertion amount adjusts to 10 to 12, file and repair at unnecessary place, this kind of assembly method effectively guaranteed the docking length of flat tube and the rigging position of butt tube assembly.
The significant beneficial effect of the present invention is: formed complete multipair junction separator Coordinative assembling theoretical method, comprised the detailed process parameter that the each several part assemblings such as expansion tube, protective cover, flexible linear shaped charge protective cover are controlled.This kind of assembly method can meet assembling intensity, harmony requirement, and by emission test, separation accuracy can meet transmitting needs completely.In addition, this kind of assembly method can also reach certain airtight requirement, at external pressure 0.35MPa, keeps in 60min situation, and internal pressure rises and is no more than 0.02MPa, and local leak rate is lower than 1 * 10
-7pa.m
3/ s.
Accompanying drawing explanation
Fig. 1 is three interface separator product profiles.
In figure: 1. frame, 2. cutting lock protective cover assembly, 3. flat tube, 4. expansion tube protective cover, 5. screw.
The specific embodiment
A separator Coordinative assembling method for three interfaces, comprises the steps:
Step 1: measure the height of flexible linear shaped charge protective cover, positional dissection rope protective cover assembly, chooses 48 point measurements and pack the height after assembly on frame, is adjusted to height fluctuation value and is less than 0.2mm, and Assurance component packs rear gapless into;
Flexible linear shaped charge protective cover assembly is comprised of protective cover and priming adapter two parts, before assembling, first two parts is connected with bolt with pin, forms full circle, makes it to become flexible linear shaped charge protective cover assembly.On measuring and protecting cover height h, frame, the depth H of groove, records size.Assembly is pressed to quadrant location, and trial assembly enters in the groove of frame, and measuring and protecting cover upper end is apart from the distance L of frame end face.The laminating gap that can draw protective cover bottom surface and frame groove face by contrast h, H, tri-numerical value of L, to guarantee that protective cover is seated, flexible linear shaped charge groove center aligns with weakening groove.By experimental study, three numerical value fluctuating ranges are not more than 0.2 and can guarantee rigging position.
After preliminary assembling, by the bottom outlet on protective cover, to open-work on frame, pull down protective cover, tapping on frame, fill steel-wire screw-socket.Ressemble flexible linear shaped charge protective cover assembly, by quadrant, align, on circumference, choose 6 mounting screws, complete the assembling of flexible linear shaped charge protective cover.
Step 2: press bottom outlet on protective cover assembly to open-work on frame, and reaming;
Step 3: protective cover assembly is pulled down, by the bottom outlet reaming on assembly to designing requirement diameter;
Step 4: tapping on frame, steel-wire screw-socket is installed;
Step 5: locate butt tube assembly on frame, and press the position assembling expansion tube of butt tube assembly, adjust expansion tube insertion depth and reach designing requirement;
Before the assembling of expansion tube protective cover, need to install flat tube, adjust and install rear assembling protective cover.Protective cover needs the debugging of assembling limit, limit, should guarantee that each intersegmental gap is even, adjusts again gap between each section and is less than 2mm.After trial assembly completes, carry out one by one mark on each segment protect cover, later each dismounting must reset by this mark.Pull down protective cover and flat tube, drilling tapping on frame, installs steel-wire screw-socket, and reaming on protective cover.After drilling work and airtight having checked, the assemblies such as flat tube, protective cover are resetted, and mounting screw, to verify the harmony of protective cover end-state.
Step 6: assembling expansion tube protective cover, assembling limit, limit is measured, and is adjusted between each protective cover gap evenly and is less than 2mm;
Step 7: expansion tube protective cover location is clamped, by the bottom outlet on protective cover to open-work on frame, and reaming;
Step 8: pull down protective cover and flat tube, repeating step two～step 4 step is until complete that the trial assembly of whole device is joined and tapping work;
8.1 flat tube sectional dimensions are controlled
Adopt the pipe of (Φ 13 * 0.85) mm to press flat tube, ratio of semi-minor axis length is 16.4:7=2.34, be that major axis is 2.34 times of minor axis length, the distortion of flat tube pressing process middle section is very inhomogeneous: the distortion of surperficial circular arc place is maximum, also the most complicated.It not only bears the deformation force of self, also will be subject to neutral line tension attenuation in addition, neutral line with interior pressurized thickening, thus as reached the sectional dimension of Feng's karman curve requirement, no matter be technique, or Fixture Design, selecting resilience parameter all to need emphasis to consider.
By theory, calculate known pipe cylindrical development size 41mm, the length of run that designs given flat tube major and minor axis is that 2 * 3.5 * π+2 * (16.4-7) are also 41mm, under such condition, on the flattening formation theory of flat tube, is feasible.
By testing the shaping dies of finally having determined groove type, controlled the distortion at Feng's karman curve R place, solved overproof problem, end face two terminal circle arc blow rule.
8.2 flat tube twists are controlled
Feng's karman curve flat tube the longest 1 is for 4600mm(is containing process allowance), because length is long,, inevitably there is the compressing overlength flat tube of multistage in the effective active length 2000mm of mould.The transition section twist that how to guarantee multistage compacting is no more than 1.5mm/m becomes a compressing primary difficult problem.
During for fear of sectional forming, the upper and lower flat segments in changeover portion joint has obvious impression, processes the hypotenuse transition region of certain length when making mould at patrix, efficiently solves the difficult problem that the transition position that joins leaves impression.
In order better to control twist, after the last period Pipe forming, manufactured and designed diaphragm frock, the distortion that in the time of can effectively preventing section pipe compacting below, leading portion pipe causes because of internal pressurization.
8.3 flat tube shaped depressions are controlled
During compacting, should guarantee that the girth of pipe is constant before and after moulding, guarantee that the moulding depression of upper lower plane after being shaped can not be greater than 0.1mm simultaneously, to compressing, propose very high requirement, must carry out a large amount of tests and technique is groped.Following control program has finally been determined in test:
8.3.1 tube interior pressurization: in order to prevent that light-wall pipe from producing depression under die pressure effect, passed into the water of certain pressure by special-purpose testing stand at tube interior, the supporting role by liquid prevents the depression in pipe flattening process.By repetition test, finally determine that overpressure value is 8MPa～10MPa;
8.3.2 flatten moulding for many times: by repetition test, finally determined and adopted 180 °, the pipe of repeatedly overturning, flatten the process of moulding 5～6 times, steel pipe is out of shape gradually, reduced once compressing, metal has little time distortion, and R place is subject to restrain the shaped depression of the pipe upper surface of causing.
8.4 flat tube bending forming technology
Bending forming Feng karman curve after steel pipe flattens, Feng's karman curve flat tube ratio of semi-minor axis length is 16.4:7=2.34, due to crooked along long axis direction, so section deformation is very inhomogeneous, with respect to the easier wrinkling and distortion along short-axis direction bending.Realizing in which way the problems such as Feng's karman curve shape of tube bending and wall light wall pipe BENDING PROCESS springback calculation becomes key and the difficult point of bending forming.
By Feng's karman curve equation, calculate each bending point and angle, use special technological equipment to carry out bending, by inspection template, verify, solve and guaranteed shape, dimensional requirement, effectively control flatness, twist, deflection, avoided the defects such as crackle, wrinkling, ovality is overproof.Meanwhile, in technique, adopt predetermined length bending, directional curvature and the crooked rear brake forming that methods such as (being mainly the correction of pattern line tempte) has realized Feng's karman curve flat tube of revising.Mainly taked following technological measure:
Wrinkling during a. for fear of flat tube bending, the twist of assurance bending flat pipe, has manufactured and designed the bending mould with groove, and the width of groove is identical with flat tube minor axis dimension;
B. accurate technology rebound value.Consider the factors such as arc length of modulus of elasticity, pipe wall thickness and the sweep of tubing, by test and theoretical calculating, finally determine that mold profile is that radius is 1/4 circular arc of 1m;
C. the length variations due to pipe in BENDING PROCESS comprises stretching and bending elongation, its numerical value changes with the material of pipe, size, bending diameter, angle of bend etc., Feng's karman curve flat tube has adopted segmentation bending to replace the method for first order buckling, integral plaster is revised shaping by model, has realized the brake forming of Feng's karman curve flat tube.
Flat tube has been riveted gusset plate complete before assembling, and does airtight inspection.For guaranteeing not damage body, assembling repaiies the manufactured head file on gusset plate to lower than surperficial 0.1mm.Install before flat tube, first, at location, quadrant place butt tube assembly, take butt tube assembly as benchmark trial assembly flat tube.During assembling, first fill flat tube right side, guarantee to insert distance and be not less than 12, left side flat tube and butt tube assembly are compared, and guarantee butt tube component assembling correct position, and flat tube left side insertion amount adjusts to 10 to 12, and file and repaiies at unnecessary place.This kind of assembly method effectively guaranteed the docking length of flat tube and the rigging position of butt tube assembly.
Step 9: with reference to examination installation step, formally pack flexible linear shaped charge protective cover, flat tube and expansion tube protective cover into, 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 deviation again trial assembly join, adjusting hole position;
Step 11: alignment pin, guide finger are installed, and are related to separated portion's section and try to dock.
In each step, unspecified step all adopts existing techniques in realizing above.
Claims (4)
1. a separator Coordinative assembling method for three interfaces, is characterized in that: comprise the steps:
Step 1: measure the height of flexible linear shaped charge protective cover, positional dissection rope protective cover assembly, chooses 48 point measurements and pack the height after assembly on frame, is adjusted to height fluctuation value and is less than 0.2mm, and Assurance component packs rear gapless into;
Step 2: press bottom outlet on protective cover assembly to open-work on frame, and reaming;
Step 3: protective cover assembly is pulled down, by the bottom outlet reaming on assembly to designing requirement diameter;
Step 4: tapping on frame, steel-wire screw-socket is installed;
Step 5: locate butt tube assembly on frame, and press the position assembling expansion tube of butt tube assembly, adjust expansion tube insertion depth and reach designing requirement;
Step 6: assembling expansion tube protective cover, assembling limit, limit is measured, and is adjusted between each protective cover gap evenly and is less than 2mm;
Step 7: expansion tube protective cover location is stepped up, by the bottom outlet on protective cover to open-work on frame, and reaming;
Step 8: pull down protective cover and flat tube, repeating step two～step 4 step is until complete that the trial assembly of whole device is joined and tapping work;
Step 9: with reference to examination installation step, formally pack flexible linear shaped charge protective cover, flat tube and expansion tube protective cover into, 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 deviation again trial assembly join, adjusting hole position;
Step 11: alignment pin, guide finger are installed, and are related to separated portion's section and try to dock.
2. the separator Coordinative assembling method of a kind of three interfaces as claimed in claim 1, it is characterized in that: described step 1 comprises that flexible linear shaped charge protective cover assembly is comprised of protective cover and priming adapter two parts, before assembling, first two parts are connected with bolt with pin, form full circle, make it to become flexible linear shaped charge protective cover assembly, measuring and protecting cover height h, the depth H of groove on frame, record size, assembly is pressed to quadrant location, trial assembly enters in the groove of frame, measuring and protecting cover upper end is apart from the distance L of frame end face, by contrast h, H, the laminating gap that tri-numerical value of L can draw protective cover bottom surface and frame groove face, to guarantee that protective cover is seated, be that flexible linear shaped charge groove center aligns with weakening groove, by experimental study, three numerical value fluctuating ranges are not more than 0.2 and can guarantee rigging position,
After preliminary assembling, by the bottom outlet on protective cover, to open-work on frame, pull down protective cover; tapping on frame, dress steel-wire screw-socket, ressemble flexible linear shaped charge protective cover assembly, by quadrant, aligns; on circumference, choose 6 mounting screws, complete the assembling of flexible linear shaped charge protective cover.
3. the separator Coordinative assembling method of a kind of three interfaces as claimed in claim 2, it is characterized in that: described step 5 comprises: before the assembling of expansion tube protective cover, need to install flat tube, adjustment installs rear assembling protective cover, protective cover needs the debugging of assembling limit, limit, should guarantee that each intersegmental gap is even, adjust again gap between each section and be less than 2mm, after trial assembly completes, on each segment protect cover, carry out one by one mark, later each dismounting must reset by this mark, pull down protective cover and flat tube, drilling tapping on frame, steel-wire screw-socket is installed, and reaming on protective cover, after drilling work and airtight having checked, by flat tube, the assemblies such as protective cover reset, and mounting screw, harmony with checking protective cover end-state.
4. the separator Coordinative assembling method of a kind of three interfaces as claimed in claim 3, is characterized in that: described step 8 comprises: 8.1 flat tube sectional dimensions are controlled
Adopt the pipe of (Φ 13 * 0.85) mm to press flat tube, ratio of semi-minor axis length is 16.4:7=2.34, be that major axis is 2.34 times of minor axis length, the distortion of flat tube pressing process middle section is very inhomogeneous: the distortion of surperficial circular arc place is maximum, also the most complicated, it not only bears the deformation force of self, also to be subject to neutral line tension attenuation in addition, neutral line with interior pressurized thickening, so as reach the sectional dimension of Feng's karman curve requirement, no matter be technique, or Fixture Design, is selecting resilience parameter all to need emphasis to consider
By theory, calculate known pipe cylindrical development size 41mm, the length of run that designs given flat tube major and minor axis is that 2 * 3.5 * π+2 * (16.4-7) are also 41mm, under such condition, on the flattening formation theory of flat tube, is feasible,
By testing the shaping dies of finally having determined groove type, controlled the distortion at Feng's karman curve R place, solved overproof problem, end face two terminal circle arc blow rule,
8.2 flat tube twists are controlled
Feng's karman curve flat tube the longest 1 is for 4600mm(is containing process allowance), because length is long, the effective active length 2000mm of mould, inevitably there is the compressing overlength flat tube of multistage, the transition section twist that how to guarantee multistage compacting is no more than 1.5mm/m becomes a compressing primary difficult problem
During for fear of sectional forming, the upper and lower flat segments in changeover portion joint has obvious impression, processes the hypotenuse transition region of certain length when making mould at patrix, efficiently solves the difficult problem that the transition position that joins leaves impression,
In order better to control twist, after the last period Pipe forming, manufactured and designed diaphragm frock, the distortion that in the time of can effectively preventing section pipe compacting below, leading portion pipe causes because of internal pressurization,
8.3 flat tube shaped depressions are controlled
The girth that should guarantee moulding front and back pipe during compacting is constant, guarantee that after being shaped, the moulding depression of upper lower plane can not be greater than 0.1mm simultaneously, to compressing, proposed very high requirement, must carry out a large amount of tests and technique is groped, following control program has finally been determined in test:
8.3.1 tube interior pressurization: in order to prevent that light-wall pipe from producing depression under die pressure effect, by special-purpose testing stand, at tube interior, passed into the water of certain pressure, supporting role by liquid prevents the depression in pipe flattening process, by repetition test, finally determines that overpressure value is 8MPa～10MPa;
8.3.2 flatten moulding for many times: by repetition test, finally determined and adopted 180 °, the pipe of repeatedly overturning, flattened the process of moulding, steel pipe is out of shape gradually for 5～6 times, reduced once compressing, metal has little time distortion, and R place is subject to restrain the shaped depression of the pipe upper surface of causing
8.4 flat tube bending forming technology
Bending forming Feng karman curve after steel pipe flattens, Feng's karman curve flat tube ratio of semi-minor axis length is 16.4:7=2.34, due to crooked along long axis direction, therefore section deformation is very inhomogeneous, with respect to the easier wrinkling and distortion along short-axis direction bending, realizing in which way the problems such as Feng's karman curve shape of tube bending and wall light wall pipe BENDING PROCESS springback calculation becomes key and the difficult point of bending forming
By Feng's karman curve equation, calculate each bending point and angle, use special technological equipment to carry out bending, by inspection template, verify, solve and guaranteed shape, dimensional requirement, flatness, twist, deflection have effectively been controlled, the defects such as crackle, wrinkling, ovality is overproof have been avoided, simultaneously, in technique, adopt predetermined length bending, directional curvature and the crooked rear brake forming that methods such as (being mainly the correction of pattern line tempte) has realized Feng's karman curve flat tube of revising, mainly taked following technological measure:
Wrinkling during a. for fear of flat tube bending, the twist of assurance bending flat pipe, has manufactured and designed the bending mould with groove, and the width of groove is identical with flat tube minor axis dimension;
B. accurate technology rebound value, considers the factors such as arc length of modulus of elasticity, pipe wall thickness and the sweep of tubing, by test and theoretical calculating, finally determines that mold profile is that radius is 1/4 circular arc of 1m;
C. the length variations due to pipe in BENDING PROCESS comprises stretching and bending elongation, its numerical value changes with the material of pipe, size, bending diameter, angle of bend etc., Feng's karman curve flat tube has adopted segmentation bending to replace the method for first order buckling, integral plaster is revised shaping by model, realized the brake forming of Feng's karman curve flat tube
Before flat tube assembling, gusset plate has been riveted complete, and do airtight inspection, for guaranteeing not damage body, assembling repaiies the manufactured head file on gusset plate to lower than surperficial 0.1mm, install before flat tube, first at location, quadrant place butt tube assembly, take butt tube assembly as benchmark trial assembly flat tube, during assembling, first fill flat tube right side, guarantee to insert distance and be not less than 12, left side flat tube and butt tube assembly are compared, guarantee butt tube component assembling correct position, flat tube left side insertion amount adjusts to 10 to 12, file and repair at unnecessary place, this kind of assembly method effectively guaranteed the docking length of flat tube and the rigging position of butt tube assembly.
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| 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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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105486523A (en) * | 2014-10-13 | 2016-04-13 | 北京宇航系统工程研究所 | Allowance test assessment method for mild detonation fuse separation device |
| 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 |
| CN111975287A (en) * | 2020-07-23 | 2020-11-24 | 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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| JPH10180577A (en) * | 1996-10-31 | 1998-07-07 | Shin Caterpillar Mitsubishi Ltd | Bearing assembling device, and its assembly jig and assembly robot |
| JP2007061948A (en) * | 2005-08-30 | 2007-03-15 | Aichi Mach Ind Co Ltd | Line system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105486523A (en) * | 2014-10-13 | 2016-04-13 | 北京宇航系统工程研究所 | Allowance test assessment method for mild detonation fuse separation device |
| 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 |
| CN111975287A (en) * | 2020-07-23 | 2020-11-24 | 哈尔滨电气动力装备有限公司 | Mounting process for hub cap of impeller of nuclear main pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103707054B (en) | 2016-12-21 |
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