CN104646875A - Control method for shape and position dimensions of 5M-grade weakly-rigid overlong storage tank - Google Patents
Control method for shape and position dimensions of 5M-grade weakly-rigid overlong storage tank Download PDFInfo
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- CN104646875A CN104646875A CN201510064057.2A CN201510064057A CN104646875A CN 104646875 A CN104646875 A CN 104646875A CN 201510064057 A CN201510064057 A CN 201510064057A CN 104646875 A CN104646875 A CN 104646875A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/003—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to controlling of welding distortion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/12—Vessels
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The embodiment of the invention discloses a control method for shape and position dimensions of a 5M weakly-rigid overlong storage tank. According to the control method, the control over roundness shape and position dimensions of the storage tank with high diameter-to-thickness ratio and weak rigidity can be realized, so that the storage tank is prevented from obviously deforming in the welding process and after welding. The storage tank is formed by welding a front bottom surface, N cylinder section parts (N is a natural number) and a rear bottom surface. The method comprises the following steps: fixing an end frame of the rear bottom surface of the storage tank on the front end face of a tooling machine head; butting the rear bottom surface with the first cylinder section part to form a welding seam, removing misaligned sides on two sides of the welding seam and then welding; butting the first cylinder section part with the second cylinder section part to form a welding seam, and removing misaligned sides on two sides of the welding seam and then welding until abutting the (N-1)th cylinder section part with the Nth cylinder section part to form a welding seam, removing misaligned sides on two sides of the welding seam and then welding; fixing an end frame of the front bottom surface of the storage box on the front end face of a tooling machine tail; welding the end frame with the Nth cylinder section part.
Description
Technical field
The present invention relates to Rocket tank field, particularly relate to the morpheme dimensional control methods of a kind of 5M level weak rigidity overlength tank.
Background technology
In recent years, aerospace industry develop rapidly, China Aerospace cause has welcome the new stage, for catching up with and surpassing the step of European and American developed countries in space station and manned space flight development, domesticly greatly develops New Launch.In order to the movement requirement that meeting spatial station is built, need the size strengthening tank, for this reason, rocket of new generation proposes diameter first can reach 5 meters, and single tank length can reach the tank design requirement of more than 20 rice.But Rocket tank material is generally the aluminium alloy of weak rigidity, its thickness, usually between 4mm-15mm, for this tank with high radius-thickness ratio, weak rigidity, large length, will ensure that the morpheme size of casing is that difficulty is very large in process of production.
Tank production technology of the prior art is mostly for the tank of minor diameter (existing maximum be only 3.5m level).This minor diameter tank length is shorter, and radius-thickness ratio is little, and rigidity own is relatively large, and morpheme size Control is relatively easy.In existing technique, for the cylinder section parts of roll bending, just one can be had to ensure preferably to circularity to during cylinder section roll bending in early stage, the later stage can also carry out school circle; The rigidity of minor diameter tank itself is comparatively large, can be reached the overall precision controlling tank by the size controlling single parts.
But 5 meters are reached for diameter, length dimension reaches for the high radius-thickness ratio of 20 meters, weak rigidity, overlength tank, because deviation accumulation is easily overproof, therefore cannot control entire length by the size controlling single parts; In addition, high radius-thickness ratio, weak rigidity, overlength tank can not wait for later stage school circle.Generally speaking, the tank production technology of prior art does not meet the generation requirement of high radius-thickness ratio, weak rigidity, overlength tank.
Summary of the invention
The embodiment of the present invention provides the morpheme dimensional control methods of a kind of 5M level weak rigidity overlength tank, realize the morpheme size Control to 5M and above diameter, the high radius-thickness ratio of overlength, the tank of weak rigidity, overproof to ensure that tank parts do not occur after welding process and welding.
Embodiments provide the morpheme dimensional control methods of a kind of 5M level weak rigidity overlength tank, described tank is welded by front bottom surface, N number of section parts (wherein, N is natural number), rear bottom surface, and wherein, described method comprises:
The end frame of bottom surface front after tank is fixed on the front end face of the frock head of a bed;
By described rear bottom surface and first section parts involutory, form weld seam, weld seam both sides eliminated after misalignment and welds;
By first section parts and second section parts involutory, form weld seam, weld seam both sides eliminated after misalignment and welds; Until N-1 cylinder section parts and N cylinder section parts involutory, form weld seam, weld seam both sides eliminated after misalignment and welds;
The end frame of the front bottom surface of tank is fixed on the front end face of frock tailstock, and welds with described N cylinder section parts.
The morpheme dimensional control methods of a kind of 5M level weak rigidity overlength tank that the embodiment of the present invention provides, first in welding process, front bottom surface and rear bottom surface are fixed with the head of a bed of frock and tailstock respectively, by the depth of parallelism of the frock head of a bed and tailstock front end face, ensure the depth of parallelism of tank.By the depth of parallelism to weld seam between each parts of tank, ensure the circle of whole tank.Compared to single long cylinder section, the welding of short cylinder section parts enhances the rigidity of tank.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of 5M level weak rigidity overlength tank that the embodiment of the present invention provides.
Fig. 2 is the flow chart of the morpheme dimensional control methods of a kind of 5M level weak rigidity overlength tank that the embodiment of the present invention provides.
Fig. 3 is the structural representation of a kind of 5M level weak rigidity overlength tank welding tooling that the embodiment of the present invention provides.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in further detail.Be understandable that, specific embodiment described herein is only for explaining the present invention, but not limitation of the invention.It also should be noted that, for convenience of description, illustrate only part related to the present invention in accompanying drawing but not full content.
In embodiments of the present invention, 5M level weak rigidity overlength tank is by being formed by multiple short cylinder section parts welding.Be illustrated in figure 1 the structural representation of a kind of 5M level weak rigidity overlength tank that the embodiment of the present invention provides.This tank is welded successively by front bottom surface (front brevicone), N number of section parts (wherein, N is natural number), rear bottom surface (rear brevicone), and each welding process likely causes the change of tank morpheme size.For this reason, need the control method designing a kind of morpheme size, ensure the circle of whole cylinder section parts in tank production process, tank length and the front and back end frame depth of parallelism.
Fig. 2 is the flow chart of the morpheme dimensional control methods of a kind of 5M level weak rigidity overlength tank that the embodiment of the present invention provides.Below in conjunction with the structure of the 5M level weak rigidity overlength tank welding tooling shown in Fig. 3, the morpheme size Control concrete grammar flow process of 5M level weak rigidity overlength tank is described.As shown in Figure 2, described method comprises the steps.
Step 110: the end frame of the rear bottom surface of tank is fixed on the front end face of the frock head of a bed.
The transition rings be specially in rear bottom surface fixes upper end frame towards sealing bottom surface direction by the mode of riveted joint, end frame upper end has end frame through hole, by involutory for the through hole of the end frame through hole of rear bottom surface and the front end face of the frock head of a bed, and then rear bottom surface is fixed on the front end face of the frock head of a bed.In one embodiment, the end frame of rear bottom surface and the front end face of the frock head of a bed can be carried out fastening by the mode be spirally connected or rivet.
Specifically, after being formed, the process of bottom surface is: by the rear brevicone of tank to the head of a bed, be spirally connected fixing by end frame and the head of a bed, by rear the end to tailstock, milling is carried out to rear brevicone, then welds after involutory assembling, after completing, be called rear bottom surface sub-assembly.
Step 120: by the transition rings of described rear bottom surface and first section parts involutory, form weld seam, weld seam both sides eliminated after misalignment and welds.Specifically comprise the steps.
。
First section parts a) is installed tailstock by step, is specially and is set to outside inner supporting device by first section parts, utilizes inner supporting device to prop up first section parts.
Step b) by moving bed tail apparatus, by involutory for the end to be welded of the end to be welded of first section parts and the transition rings of rear bottom surface, form district to be welded; Inner supporting device support mechanism in rear basal surface position is utilized to prop up district to be welded.
Here it is to be noted that it in step b) in need to change formation inner supporting device inner support block of support mechanism in rear basal surface position the inner support block of the weldering bakie with certain size into, the molding space that when providing welding, weld seam weldering is leaked.
In order to ensure the control to tank morpheme, rear bottom surface should be parallel with the end frame face of front bottom surface with the weld seam face of the first involutory rear formation of section parts.
Step c) inner support eliminates the fissure of displacement in district to be welded, and the so-called fissure of displacement or misalignment refer to that two parts are in involutory process, can not realize perfect alignment and the dislocation that produces, and the existence of the fissure of displacement or misalignment can make weld seam shrink to become large, affect the linearity of tank.Here requirement, the outside diameter of inner support mechanism need be equal to or slightly greater than the internal diameter of cylinder section parts.In actual applications, definitely eliminate gap and be difficult to accomplish, only need the gap between two parts to be not more than predetermined value, such as 0.5mm.
Steps d) utilize key pressing plate to compress district to be welded, use the mode matching step c of external pressure) in inner support, can guarantee that the circularity of position while welding, in welding process and after welding, obvious distortion does not occur.
In one embodiment, the pressure of key pressing plate is 0.6-0.8Mpa.
When utilizing key pressing plate to compress cylinder section parts, need on the cylinder section parts treating welding line both sides, to increase backing plate, with anti-tamper cylinder section parts; The region that key pressing plate carries out compressing need within backing plate width range.
Step e) butt welded seam welds.
Step 130: by first section parts and second section parts involutory, form weld seam, weld seam both sides eliminated after misalignment and welds; Until N-1 cylinder section parts and N cylinder section parts involutory, form weld seam, weld seam both sides eliminated after misalignment and welds.
In this step, expression can be numbered according to the distance of the front bottom surface of distance tank to cylinder section, be defined as first section parts successively to N cylinder section parts.Such as, 5 length can be utilized to be that the cylinder section parts of 4 meters are welded into the tank that length is 20 meters successively, so these 5 cylinder section parts can be defined as the 1st section parts successively to the 5th section parts.Certainly, if in an embodiment, if tank only has cylinder section parts, then without the need to performing this step.
Be welded as example with the weld seam between first section parts and second section parts, welding process be described:
The inner supporting device of the tailstock being positioned at frock a) is goed deep into first section by step, makes inner supporting device support mechanism in first fragment position prop up the end to be welded of first section, carries out milling, to control the overall dimension of tank to this end to be welded.
Here, milling length can be controlled according to the length and welding contracted quantity working as placket section parts.Wherein, the welding contracted quantity of cylinder section parts can be determined according to the welding experience of the different-thickness parts of long term accumulation.
Step b) inner supporting device of tailstock is exited first section.
Step c) second section parts is installed tailstock, be specially and second section parts is set to outside inner supporting device, utilize inner supporting device to prop up second section parts.
Steps d) by moving bed tail apparatus, by the end to be welded of second section parts and the end to be welded of first section involutory, form district to be welded; Inner supporting device support mechanism in first fragment position is utilized to prop up district to be welded.
Step e) inner support eliminates the fissure of displacement in district to be welded.
Step f) utilize key pressing plate to compress district to be welded, use the mode matching step d of external pressure) in inner support, can guarantee that the circularity of position while welding, in welding process and after welding, obvious distortion does not occur.
It will be understood by those skilled in the art that between each section parts involutory, to eliminate misalignment process identical with the weld seam welding process between first section parts and second section parts.In milling process, the cylinder section part being always positioned at head of a bed side in butt welded seam both sides carries out milling.
In one embodiment, when tank erection welding to half, the length of tank, weight increases, and the position while welding of tank bears overweight, and weld seam can deform, therefore can place roller support bottom tank and hold casing, prevent box deformation, need after whole tank completes to ensure two roller supports hold casing can, this effectively can ensure the morpheme size such as circularity and FCL linearity of tank at position while welding.
Step 140: the front bottom surface of tank is fixed on the front end face of frock tailstock.
The transition rings be specially in front bottom surface fixes upper end frame towards sealing bottom surface direction by the mode of riveted joint, end frame upper end has end frame through hole, by involutory for the through hole of the end frame through hole of front bottom surface and the front end face of frock tailstock, and then front bottom surface is fixed on the front end face of frock tailstock.In one embodiment, the end frame of front bottom surface and the front end face of frock tailstock can be carried out fastening by the mode be spirally connected or rivet.
Because the front end face of frock tailstock and the head of a bed is parallel relation, after front bottom surface and rear bottom surface be separately fixed at the front end face of frock tailstock and the head of a bed by frame by end, can ensure that the depth of parallelism of tank front and back end frame and front and back end frame and central axis degree are not overproof.
Step 150: front bottom surface is welded with described N cylinder section parts.
Here, the forming process of front bottom surface is: by brevicone before tank to the head of a bed, by end frame and the head of a bed be spirally connected fixing, by front the end to tailstock, milling is carried out to front brevicone, then welds after involutory assembling, after completing, be called front bottom surface sub-assembly.
It should be noted that needed accurate Calculation to the milling length of N cylinder section parts before welding with sub-assembly of the front end N cylinder section parts, thus ensured that postwelding tank overall length is not overproof.
As can be seen from the above embodiments, for the milling process for controlling tank size, to have and the side neck section parts only treating welding zone carry out milling at every turn.Such benefit is, compared to both sides milling, more accurate to the control of tank size, if both sides milling simultaneously, probably causes scale error out of control, and before causing last parts to weld, tank length is overproof cannot compensate too greatly; And only need side to equip Grinder.
Above are only preferred embodiment of the present invention and institute's application technology principle.Skilled person in the art will appreciate that and the invention is not restricted to specific embodiment described here, various obvious change can be carried out for a person skilled in the art, readjust and substitute and can not protection scope of the present invention be departed from.Therefore, although be described in further detail invention has been by above embodiment, the present invention is not limited only to above embodiment, when not departing from the present invention's design, can also comprise other Equivalent embodiments more, and scope of the present invention is determined by appended right.
Claims (11)
1. a morpheme dimensional control methods for 5M weak rigidity overlength tank, is characterized in that, described tank is welded by front bottom surface, N number of section parts (wherein, N is natural number), rear bottom surface, and wherein said method comprises:
The end frame of the rear bottom surface of tank is fixed on the front end face of the frock head of a bed;
By described rear bottom surface and first section parts involutory, form weld seam, weld seam both sides eliminated after misalignment and welds;
By first section parts and second section parts involutory, form weld seam, weld seam both sides eliminated after misalignment and welds; Until N-1 cylinder section parts and N cylinder section parts involutory, form weld seam, weld seam both sides eliminated after misalignment and welds;
The end frame of the front bottom surface of tank is fixed on the front end face of frock tailstock, and welds with described N cylinder section parts.
2. method according to claim 1, is characterized in that, by described first section and second section parts involutory, form weld seam, weld seam both sides eliminated to weld after misalignment and comprise:
Milling is carried out to the end to be welded of first section;
Second section parts is installed tailstock, is set to outside inner supporting device, utilize inner supporting device to prop up second section parts;
Moving bed tail apparatus, by the end to be welded of second section parts and the end to be welded of first section involutory, form district to be welded; Inner supporting device support mechanism in first fragment position is utilized to prop up district to be welded;
Inner support eliminates the fissure of displacement in district to be welded;
Key pressing plate is utilized to compress district to be welded;
Butt welded seam welds.
3. method according to claim 2, is characterized in that, determines the milling length to first section end to be welded according to the length and welding contracted quantity control milling length of working as placket section parts.
4. method according to claim 2, is characterized in that, before carrying out milling, comprises further the end to be welded of first section:
The inner supporting device of the tailstock being positioned at frock is goed deep into first section, make inner supporting device support mechanism in first fragment position prop up the end to be welded of first section;
After milling is carried out to the end to be welded of first section, comprise further:
The inner supporting device of tailstock is exited first section.
5. method according to claim 2, is characterized in that, before utilizing inner supporting device support mechanism propping up district to be welded in first fragment position, comprises further:
The inner support block forming inner supporting device support mechanism in first fragment position is changed into the inner support block with certain size weldering bakie, the molding space that when providing welding, weld seam weldering is leaked.
6. method according to claim 2, is characterized in that, the pressure of described key pressing plate is 0.6-0.8Mpa.
7. method according to claim 2, is characterized in that, utilize key pressing plate treat weld zone compress time, the parts treating welding line both sides increase backing plate, and described key pressing plate is treated weld zone at backing plate width range and is compressed.
8. method according to claim 1, is characterized in that, by involutory for two cylinder section parts, forms weld seam, and the process of welding after misalignment is eliminated in weld seam both sides comprises: the cylinder section part being positioned at head of a bed side in butt welded seam both sides carries out milling.
9. method according to claim 1, is characterized in that, comprises further:
Place bottom tank and be used for holding tank, prevent the roller support that tank is out of shape.
10. method according to claim 1, is characterized in that, the end frame of described front bottom surface or described rear bottom surface is fixed on the front end face of the described frock head of a bed or tailstock in the mode be spirally connected or rivet.
11. methods according to claim 1, general every erection welding 2 parts, can increase circular inner support at corresponding position while welding and prevent distortion in order to support component, then proceed the erection welding work of next parts after parts erection welding completes.
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| CN201510064057.2A CN104646875B (en) | 2015-02-06 | 2015-02-06 | A kind of morpheme dimensional control methods of 5M level weak rigidity overlength tank |
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| CN201510064057.2A CN104646875B (en) | 2015-02-06 | 2015-02-06 | A kind of morpheme dimensional control methods of 5M level weak rigidity overlength tank |
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| CN109014643A (en) * | 2018-09-18 | 2018-12-18 | 天津航天长征火箭制造有限公司 | A kind of large thin-wall tank cabinet assembly method based on elastic perimeter |
| CN111037204A (en) * | 2019-12-31 | 2020-04-21 | 湖北三江航天红阳机电有限公司 | Welding tool and welding method |
| CN111069744A (en) * | 2019-12-28 | 2020-04-28 | 天津航天长征火箭制造有限公司 | Method for controlling shape and position dimensions of 5-meter-diameter spherical box bottom through assembling and welding |
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Inventor after: Meng Fanxin Inventor after: Li Jinsong Inventor after: Liu Hanwei Inventor after: Zhou Linshu Inventor after: Liu Xianli Inventor after: Wang Jue Inventor after: Li Dong Inventor after: Tao Gang Inventor after: Tian Zhijie Inventor after: Liu Jingwei Inventor after: Zhang Zhongping Inventor after: Song Jianling Inventor before: Meng Fanxin Inventor before: Liu Xianli Inventor before: Tian Zhijie Inventor before: Liu Jingwei Inventor before: Zhang Zhongping Inventor before: Song Jianling Inventor before: Li Jinsong Inventor before: Liu Hanwei Inventor before: Zhou Linshu |
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