CN116255557A - Cylindrical structure, manufacturing method thereof and cylindrical container - Google Patents

Abstract

The invention relates to a tubular structure, a method for manufacturing the same and a tubular container. A method of manufacturing a tubular structure, comprising the steps of: manufacturing at least two barrel sections, wherein the thicknesses of barrel walls of at least two barrel sections are different; all the barrel sections are connected end to end in the longitudinal direction. According to the manufacturing method of the cylindrical structure, corresponding designs can be made according to the strength requirements of all sections, so that the wall thicknesses of different sections are different, thick-wall sections are adopted in the areas with high strength requirements such as high load and high bearing pressure, and thin-wall sections are adopted in the areas with low strength requirements such as low load and low bearing pressure. The thickness of the cylinder wall of the manufactured cylinder structure is changed in a targeted and differential manner, so that the effect of light weight can be achieved by reducing the thickness of the partial cylinder wall of the cylinder structure on the premise of meeting the strength requirement.

Description

Cylindrical structure, manufacturing method thereof and cylindrical container

Technical Field

The invention relates to the technical field of part manufacturing, in particular to a cylindrical structure, a manufacturing method thereof and a cylindrical container.

Background

In order to meet the use requirements of storage, transportation, construction and the like, the cylinder structure is widely applied to the field of metal part manufacturing. According to different product demands, the cylinder structure and the container can be made of different materials such as steel, aluminum/magnesium alloy, titanium alloy and the like, and structurally have different cross-sectional shapes such as round, elliptic, rectangular and the like, and different structural forms such as single layers, multiple layers and the like.

At present, the energy source environment problem is increasingly serious, the requirements on the aspects of energy conservation, emission reduction, environmental protection and the like are also higher, the related barrel structure parts generally have the characteristics of large integral volume and weight, and the requirements of reality and light weight are difficult to meet.

Disclosure of Invention

In view of the above, it is necessary to provide a tubular structure, a method of manufacturing the tubular structure, and a tubular container, which can achieve the purpose of further weight reduction.

A method of manufacturing a tubular structure, the method comprising the steps of:

manufacturing at least two barrel sections, wherein the thicknesses of barrel walls of at least two of all the barrel sections are different;

all the barrel sections are connected end to end in the longitudinal direction.

According to the manufacturing method of the cylindrical structure, corresponding designs can be made according to the strength requirements of all sections, so that the wall thicknesses of different sections are different, thick-wall sections are adopted in the areas with high strength requirements such as high load and high bearing pressure, and thin-wall sections are adopted in the areas with low strength requirements such as low load and low bearing pressure. The thickness of the cylinder wall of the manufactured cylinder structure is changed in a targeted and different manner, so that the effect of light weight can be achieved by reducing the thickness of the partial cylinder wall of the cylinder structure on the premise of meeting the strength requirement.

In one embodiment, the step of joining all of the barrel sections end-to-end lengthwise comprises:

overlapping or aligning the ends of the barrel sections to be joined;

and welding at the lap joint or the alignment position to obtain the pre-connection cylinder section.

In one embodiment, the welding at the lap joint or alignment is arc welding, resistance spot welding, laser welding, brazing, or friction stir welding.

In one embodiment, the step of welding at the lap joint or alignment further comprises:

and detecting the quality of the welded weld joint.

In one embodiment, the step of welding at the lap joint or alignment further comprises:

and annealing heat treatment is adopted for the pre-connection cylinder section to obtain the target cylinder structure.

In one embodiment, the step of manufacturing at least two of the barrel sections comprises:

and winding the plate to obtain the section.

A tubular structure comprising at least two tubular sections, all of which are connected end to end in a lengthwise direction;

wherein the thicknesses of the cylinder walls of at least two of all the cylinder sections are different.

In one embodiment, adjacent sections of the cartridge are joined by welding or riveting.

In one embodiment, the cylindrical structure comprises a first cylindrical section, a second cylindrical section and a third cylindrical section, wherein the second cylindrical section is positioned between the first cylindrical section and the third cylindrical section, and the thickness of the cylindrical wall of the second cylindrical section is smaller than that of the first cylindrical section and the third cylindrical section.

A tubular container comprises at least one layer of peripheral structure and a terminal arranged at the end part of the peripheral structure, wherein at least one layer of peripheral structure is the tubular structure.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a cylindrical structure according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of the tubular structure of FIG. 1 in an aligned connection;

FIG. 3 is a schematic cross-sectional view of the tubular structure of FIG. 1 using lap joints;

FIG. 4 is a schematic view of a structure of a connected board according to an embodiment of the present invention;

FIG. 5 is a schematic view of a cylindrical container according to an embodiment of the present invention;

FIG. 6 is a flow chart of a method for manufacturing a cylindrical structure according to an embodiment of the invention;

FIG. 7 is a schematic cross-sectional view of a tubular structure at a junction according to an embodiment of the present invention.

Reference numerals illustrate: 100. a cylindrical structure; 101. a first barrel section; 102. a second barrel section; 103. a third barrel section; 104. welding seams; 200. a cylindrical container; 201. a front end; 202. a rear end; 203. a container mouth; 300. a sheet material.

Detailed Description

In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the term "and/or" is merely an association relation describing the association object, meaning that three relations may exist, e.g. a and/or B, may be represented: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship. The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Generally, the thickness of the cylindrical wall of the cylindrical structure needs to be designed to fully consider the strength requirement, and generally, the higher the strength requirement is, the thicker the thickness of the cylindrical wall is correspondingly. Considering that in practice the stress of the structure may not be uniform throughout its area, its strength needs to meet its highest strength requirement, i.e. the thickness of the cylinder wall needs to be designed according to the highest strength requirement. The traditional cylindrical structure has the advantages that even if only a small section of area has high strength requirement, the thickness of the cylinder wall of the whole structure can be correspondingly designed to be thickened, so that the weight of parts is greatly increased, and the concept of weight violating is realized.

Referring to fig. 1 to 3, in order to solve the foregoing and related problems, an embodiment of the present invention provides a cylindrical structure 100, which includes at least two cylindrical sections (the first, second and third cylindrical sections 101, 102, 103 are all cylindrical sections) connected end to end along a longitudinal direction. Wherein, the thickness of the cylinder wall of at least two cylinder sections is different.

It will be appreciated that each barrel section may be considered as a single unitary barrel that forms the barrel structure 100, with the longitudinal direction of the barrel sections, i.e., the axial direction thereof, and all barrel sections being joined end-to-end in sequence, together forming a longer length barrel structure 100. The number of the barrel sections may be two, three or more, and may include two or more barrel wall thicknesses, which are not particularly limited herein. The thickness of the cylinder wall of the single cylinder section can be equal to or thicker than the thickness of the cylinder section, and the thickness of the cylinder wall refers to the average thickness of the cylinder wall of the whole cylinder section.

The above-mentioned tubular structure 100 can be designed according to the strength requirements of each segment, so that the wall thicknesses of different segments are different, thick-wall segments are adopted in the areas with high strength requirements such as high load and high bearing pressure, and thin-wall segments are adopted in the areas with low strength requirements such as low load and low bearing pressure. The thickness of the cylinder wall of the entire cylinder structure 100 presents a targeted differential variation. Thus, the cylindrical structure 100 can achieve the effect of light weight by reducing the thickness of the partial cylindrical wall of the cylindrical structure 100 on the premise of meeting the strength requirement.

Further, adjacent barrel sections are joined by welding or riveting. The adjacent barrel sections may be aligned end to end or overlap and secured by welding or riveting. All the cylinder sections are connected together in a welding or riveting mode, so that the cylinder sections can be connected section by section or can be connected in a plurality of sections at the same time.

Specifically, the tubular structure 100 may be manufactured by winding the sheet 300 to obtain a single tube section, and then connecting a plurality of tube sections to obtain the tubular structure 100, or may be manufactured by connecting a plurality of sheet 300 (as shown in fig. 4) and then winding the sheet 300 together, where the thickness of the sheet 300 is the thickness of the tube wall of the manufactured tube section. The tubular structure 100 may be manufactured by directly forming a tube segment using a material and then connecting the tube segment to obtain the tubular structure 100.

In other embodiments, the adjacent barrel sections may be joined by other joining processes, such as bonding, clamping, etc., or may be formed directly integrally, and the particular process may be selected based on factors such as the materials of the barrel sections, and is not specifically limited herein.

Still further, adjacent barrel sections are welded by means of arc welding, resistance spot welding, laser welding, brazing or friction stir welding. The welding mode is convenient to operate and reliable in connection.

In a specific embodiment, the barrel sections are made of metal materials such as stainless steel, and adjacent barrel sections are welded by laser through laser welding equipment, so that the laser welding has the advantages of high production efficiency, good connection quality, simple process, controllable assembly and the like. The tubular structure 100 obtained by laser welding has good weld uniformity and good sealability. In other embodiments, the barrel sections may also be made of non-metal, such as plastic, to meet different application requirements, without limitation.

In some embodiments, the tubular structure 100 includes a first tubular section 101, a second tubular section 102, and a third tubular section 103, the second tubular section 102 is located between the first tubular section 101 and the third tubular section 103, and a thickness of a wall of the second tubular section 102 is less than a thickness of a wall of the first tubular section 101 and the third tubular section 103.

The thicknesses of the cylinder walls of the first cylinder section 101 and the third cylinder section 103 may be the same or different.

The second cylinder section 102 is thin, the first cylinder section 101 and the third cylinder section 103 are thick, and the cylindrical structure 100 is particularly suitable for application scenes with small middle load, low bearing pressure, large two-side load and high bearing pressure. It will be appreciated that in other instances, the tubular structure 100 may have other numbers of segments, or alternatively be thicker in the middle, thinner at both ends, etc.

The tubular structure 100 is composed of a first tubular segment 101, a second tubular segment 102, and a third tubular segment 103. Wherein the thicknesses of the cylinder walls of the first cylinder section 101 and the third cylinder section 103 are the same, and the thickness of the cylinder wall of the second cylinder section 102 is smaller than that of the first cylinder section 101 and the third cylinder section 103. The first barrel section 101 and the second barrel section 102 are connected with one end in the longitudinal direction aligned, the third barrel section 103 and the second barrel section 102 are connected with the other end in the longitudinal direction aligned, and the aligned parts are connected in a welding mode.

Referring to fig. 5, an embodiment of the present invention further provides a cylindrical container 200, which includes at least one layer of peripheral structures and ends (the front end 201 and the rear end 202 are both ends) disposed at the end of the cylindrical structure 100, wherein at least one layer of the peripheral structures is the cylindrical structure 100.

At least one layer of the peripheral structure is the cylindrical structure 100, which means that when the peripheral structure is a single layer, the peripheral structure is the cylindrical structure 100, and when the peripheral structure is a plurality of layers, at least one layer of the peripheral structure is the cylindrical structure 100, wherein all the peripheral structures can be different in diameter and coaxially arranged.

The end head can be arranged at one end of the peripheral side structure, or can be two ends respectively arranged at two ends of the peripheral side structure. The end can play the shutoff effect to the tip of week side structure, and the shutoff effect can be for totally closed or leave the partial closure of opening to adapt to different demands. The cylindrical container 200 with the end head can form a containing cavity for containing articles, and the wall thickness of each part can be designed according to the internal load, pressure distribution and other factors, and the thickness of the cylindrical wall of the region with small strength requirement is smaller, so that the cylindrical container 200 is light.

In one embodiment, the peripheral structure is a layer and is a tubular structure 100, and the ends are respectively disposed at two ends of the tubular structure 100 and are respectively a front end 201 and a rear end 202. Wherein the front head 201 is configured with a container mouth 203. As a whole, the cylindrical container 200 retains only the container port 203 to be communicable with the outside.

The cylindrical vessel 200 may be a liquefied natural gas cylinder for vehicles, i.e., a high vacuum insulation vessel for vehicles to store liquefied natural gas. The material is stainless steel, the thickness of the first barrel section 101 and the third barrel section 103 is 8mm, the length is 200mm, the thickness of the second barrel section 102 is 4mm, and the length is 800mm. It is readily apparent that the cylindrical vessel 200 benefits from the thinner thickness of the second barrel section 102, which is significantly lighter in weight than a gas cylinder having a through-body material thickness of 8mm, and the light weight effect is significant.

Referring to fig. 6, an embodiment of the present invention further provides a method for manufacturing a cylindrical structure, including the following steps:

s10, manufacturing at least two barrel sections, wherein the thicknesses of barrel walls of at least two barrel sections are different;

s30, connecting all the barrel sections end to end along the longitudinal direction.

The method of manufacturing the tubular structure may be used to manufacture the tubular structure 100 described above. All the barrel sections are connected end to end in sequence to collectively form a longer length barrel structure 100. The number of the barrel sections may be two, three or more, and may include two or more barrel wall thicknesses, which are not particularly limited herein. The thickness of the cylinder wall of the single cylinder section can be equal to or thicker than the thickness of the cylinder section, and the thickness of the cylinder wall refers to the average thickness of the cylinder wall of the whole cylinder section.

According to the manufacturing method of the cylindrical structure, corresponding designs can be made according to the strength requirements of all sections, so that the wall thicknesses of different sections are different, thick-wall sections are adopted in the areas with high strength requirements such as high load and high bearing pressure, and thin-wall sections are adopted in the areas with low strength requirements such as low load and low bearing pressure. The thickness of the cylinder wall of the manufactured cylinder structure 100 shows targeted differential change, so that the effect of light weight can be achieved by reducing the thickness of the partial cylinder wall of the cylinder structure 100 on the premise of meeting the strength requirement.

Further, the step of manufacturing at least two barrel sections comprises: the sheet 300 is rolled to form a log.

It will be appreciated that each sheet 300 is wound to provide a single tube segment and repeated operations provide multiple tube segments. The corresponding relation exists between the plate 300 and the barrel section, the thickness of the plate 300 is the thickness of the barrel wall of the barrel section obtained after the barrel is rolled, and barrel sections with different thicknesses of the barrel wall can be obtained by selecting the barrel of the plate 300 with different thicknesses. The plate 300 can be cleaned, leveled, processed, polished and the like before being rolled, so that the surface of the plate 300 is smooth and flat, and the end of a section obtained by the rolling is flat. In addition, the tubular structure 100 may be manufactured by forming the material directly into the tube segments.

In other embodiments, the method of manufacturing the tubular structure may further be: connecting at least two plates 300 end to end, wherein at least two of the plates 300 have different thicknesses; the connected plate 300 is wound to form the tubular structure 100. Similarly, in the joined sheets 300, each sheet 300 corresponds to a section of the tube after the winding of the sheet 300, and the thickness of each sheet 300 corresponds to the thickness of the wall of the section of the tube after the winding of the sheet. After the drum of at least two sheets 300 is formed into a drum segment, the drum segment is obtained and the drum structure 100 formed by the drum segments is naturally obtained due to the connection relationship between the sheets 300.

Referring to fig. 7, in some embodiments, the step of connecting all the sections end to end in the longitudinal direction includes: overlapping or aligning the ends of the barrel sections to be connected; and welding at the lap joint or the alignment position to obtain the pre-connection cylinder section.

Adjacent barrel sections can be connected through end alignment, lap joint can also be carried out through end part overlapping, fixed connection is realized by adopting a welding process at the joint, and the barrel sections can be fixed through a welding fixture during welding and then welded. The plurality of barrel sections can be welded to obtain the pre-connected barrel sections, and the pre-connected barrel sections can be subjected to subsequent detection and processing to obtain the final target barrel-shaped structure 100, or can be directly used as the target barrel-shaped structure 100 without detection and processing.

Further, the welding performed at the lap joint or alignment is arc welding, resistance spot welding, laser welding, brazing, or friction stir welding. Such a manner of welding is easy to operate and reliable in connection.

In a specific embodiment, the welding performed at the lap joint or the alignment position is laser welding, the welding seam 104 of the laser welding needs to ensure that the ends of the two connected barrel sections are fully fused, and the thickness of the welding seam 104 at least reaches the thickness of the thinner one of the two barrel sections, and the welding seam has no larger welding deformation, so that the requirement of subsequent processing and manufacturing is met.

Specifically, the laser welding is completed by adopting laser welding equipment, the laser welding equipment comprises a laser welding host machine, a laser welding automatic workbench, a cooling system, a tool fixture, an observation system and the like, the laser welding equipment can be a special machine or a welding robot, the welding platform can be a fixed platform or an external shaft, and the laser power is determined according to the welded material and thickness. A 5800w laser beam can be selected to weld the adjacent barrel sections, so that the joint is completely penetrated.

Further, the step of welding at the lap joint or alignment may further comprise: quality inspection of welded seam 104 is performed, and may be performed with X-rays in particular.

The quality detection of the welding seam 104 can find problems in time, for example, whether quality defects such as partial welding and cracks exist or not, and for products with unqualified quality of the welding seam 104, follow-up measures, repair welding, re-welding or scrapping treatment and the like can be determined according to the severity of the defects, so that the situation that in the follow-up processing and using process, the connecting parts are broken due to the quality defects, and adjacent barrel sections are separated is avoided. In particular, when the sheet 300 is first joined and then the reel is manufactured, it is necessary to perform quality inspection of the weld 104 after the reel.

In other embodiments, the quality of weld 104 may be detected using ultrasonic inspection, magnetic inspection, etc., without limitation.

Still further, the step of welding at the lap joint or alignment may further comprise, after: annealing heat treatment is applied to the pre-joined barrel sections to obtain the target barrel structure 100.

The annealing heat treatment can enhance the processing and manufacturing properties of the weld seam 104 so that the resulting tubular structure 100 can meet manufacturing requirements of cutting, forming, welding, and the like.

In the above-described method for manufacturing the tubular structure, the sheet 300 is first rolled to obtain at least two tubular segments, wherein the thicknesses of the tubular walls of at least two of the tubular segments are different. All the sections are connected end to end along the longitudinal direction and are fixed through laser welding, so that the pre-connected sections are obtained. After the laser welding is completed, the quality of the welded seam 104 is detected, and repair welding, re-welding or scrapping treatment is selected according to the serious conditions of unqualified parts. Finally, the pre-joined barrel sections are subjected to an annealing heat treatment to obtain the target barrel structure 100. The tubular structure 100 thus obtained has good workability, and can be subjected to operations such as cutting and welding.

At the beginning of design, the plate 300 with proper thickness can be selected according to the conditions of load, bearing and the like of the cylindrical structure 100 in the final application scene, the cylindrical section made of the thick plate 300 is selected at the place with high load and bearing, whereas the cylindrical section made of the thin plate 300 is selected at the place with low load and bearing. The cylindrical structure 100 thus manufactured can reduce the thickness of the cylindrical section at the position of low strength requirement on the premise of meeting the strength requirement at all positions, thereby realizing self weight reduction.

It can be appreciated that, based on the above-mentioned manufacturing method of the tubular structure, the tubular container 200 may also be manufactured by mounting the ends at the two ends of the obtained tubular structure 100, and the tubular container 200 has all the advantages of the tubular structure 100 accordingly, which will not be described herein.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims (10)

1. A method of manufacturing a tubular structure, the method comprising the steps of:

manufacturing at least two barrel sections, wherein the thicknesses of barrel walls of at least two of all the barrel sections are different;

all the barrel sections are connected end to end in the longitudinal direction.

2. The method of manufacturing a tubular structure according to claim 1, wherein the step of connecting all the tubular segments end to end in the longitudinal direction comprises:

overlapping or aligning the ends of the barrel sections to be joined;

and welding at the lap joint or the alignment position to obtain the pre-connection cylinder section.

3. The method of manufacturing a tubular structure according to claim 2, wherein the welding performed at the lap joint or alignment is arc welding, resistance spot welding, laser welding, brazing or friction stir welding.

4. The method of manufacturing a tubular structure according to claim 2, wherein the step of welding at the lap joint or alignment further comprises:

quality inspection of the welded seam (104) is performed.

5. The method of manufacturing a tubular structure according to claim 2, wherein the step of welding at the lap joint or alignment further comprises:

and annealing heat treatment is adopted for the pre-connection cylinder section to obtain the target cylinder structure.

6. A method of manufacturing a tubular structure according to claim 1, wherein the step of manufacturing at least two of the tubular segments comprises:

the sheet material (300) is wound into a roll to obtain the roll segment.

7. A tubular structure characterized in that the tubular structure comprises at least two tubular sections, all of which are connected end to end in a longitudinal direction;

wherein the thicknesses of the cylinder walls of at least two of all the cylinder sections are different.

8. The tubular structure of claim 7, wherein adjacent segments are joined by welding or riveting.

9. The tubular structure of claim 7, characterized in that the tubular structure comprises a first tubular section (101), a second tubular section (102) and a third tubular section (103), the second tubular section (102) is located between the first tubular section (101) and the third tubular section (103), and the thickness of the tubular wall of the second tubular section (102) is smaller than the thicknesses of the tubular walls of the first tubular section (101) and the third tubular section (103).

10. A tubular container comprising at least one layer of peripheral structure and a tip disposed at an end of the peripheral structure, at least one layer of the at least one layer of peripheral structure being the tubular structure of any one of claims 7-9.

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