CN209969278U - Full-filling core rod for bending and forming pipe - Google Patents
Full-filling core rod for bending and forming pipe Download PDFInfo
- Publication number
- CN209969278U CN209969278U CN201920651017.1U CN201920651017U CN209969278U CN 209969278 U CN209969278 U CN 209969278U CN 201920651017 U CN201920651017 U CN 201920651017U CN 209969278 U CN209969278 U CN 209969278U
- Authority
- CN
- China
- Prior art keywords
- pipe
- swing type
- type movable
- core rod
- movable joint
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The utility model discloses a fill flexible plug structure entirely that is used for tubular product bending forming's, especially thin wall tubular product space three-dimensional bending forming, including oscillating movable joint, soft chain, installation end, adjusting part. The flexible core rod structure is provided with a plurality of swing type movable joints, the center of each swing type movable joint is provided with a through hole, and the through holes penetrate through the soft chain to connect all the swing type movable joints in series; the tail end of the soft chain is provided with an adjusting nut for adjusting the tensioning degree of the soft chain and further adjusting the matched pressing force between the swing type movable joints; the mounting end of the flexible core rod structure is fixed on the pipe bending forming equipment; when the pipe is bent and formed, the flexible core rod structure is placed in a pipe cavity, and along with the completion of three-dimensional bending deformation of the pipe in space, the flexible core rod structure also deforms in a follow-up manner, and the guiding, supporting and transmission effects are completed. The utility model discloses can restrain the crooked inside wall of tubular product tendency of corrugating, realize the high quality of thin wall tubular product small cross section distortion, high size precision and shape.
Description
Technical Field
The utility model belongs to the technical field of the metal pipe bending technique of taking shape and specifically relates to a fill plug entirely for tubular product bending takes shape.
Background
Pipelines processed by using a three-dimensional space bending forming technology in aerospace, automobile, ship and chemical industries are in large quantity. There are many spatial three-dimensional bending techniques for pipelines, such as a numerically controlled pipe bender (wrap-around forming), a three-dimensional free bending technique, and the like. When a pipe is bent and formed, the inner side of a bent arc section is wrinkled, the outer side is pulled apart, and the cross section is deformed in an oval manner, which are common forming defects and need to be overcome as much as possible, wherein the common process method is to fill a filler or a core rod in a pipe cavity.
Common fillers in bending pipes are low melting point alloys (lead, tin, etc.), polyurethane, sand, etc. Common mandrel structures include rigid mandrels, articulated mandrels, and the like.
The core rod structure in the prior art is filled into a pipe cavity, the filling density is uncontrollable, the core rod structure cannot be flexibly adjusted, and the core rod structure cannot approach a full-filling state. For bending forming of thin-walled tubes, wrinkling and cross section elliptic distortion are very serious, a core rod in a cavity is required to be in a full-filling state, and the core rod can flexibly swing in all directions of space during bending.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a fill the plug entirely for tubular product bending forming to improve the packing density of plug in the tubular product die cavity, realize being close the effect of filling entirely, improve the shaping quality.
The technical scheme of the utility model as follows:
a fully filled mandrel for pipe bend forming comprising: the center of each swing type movable joint is provided with a through hole, and the swing type movable joints are arranged into three-dimensional entities surrounded by two spherical crown curved surfaces;
the flexible chain penetrates through the through hole to connect the swing type movable joints in series;
the mounting end is connected with the pipe bending forming equipment;
when the pipe is bent and formed, the core rod is placed in the pipe cavity, and along with the completion of three-dimensional bending deformation of the pipe in space, the core rod structure deforms in a follow-up manner, and the guiding, supporting and transmission effects are completed. The utility model discloses the plug can restrain the crooked inside wall of tubular product tendency of corrugating, realizes the high quality of thin wall tubular product small cross section distortion, high size precision and takes shape.
Preferably, the chain tensioner further comprises an adjusting component, wherein the adjusting component is arranged at the tail end of the soft chain and used for adjusting the tensioning degree of the soft chain and further adjusting the matched pressing force between the swing type movable joints.
Preferably, the mounting end is connected to the pivot joint by a support section.
Preferably, the support section is provided to include a straight cylinder part and a spherical crown curved part; the straight-moving cylinder part is connected with the mounting end, and the curved surface of the spherical crown curved part is matched with the inner curved surface of the swing type movable joint.
Preferably, each swing type movable joint is a three-dimensional entity surrounded by two spherical crown curved surfaces with the same diameter, and the through hole is arranged in the direction of the connecting line of the spherical centers of the two spherical crown curved surfaces.
Preferably, the spherical center distance of the curved surfaces of the two spherical crowns of the swing type movable joint is adjusted to change the filling density of the whole flexible core rod structure in the cavity of the pipe.
Preferably, the swing type movable joint is a metal or nonmetal swing type movable joint, the soft chain is a metal or nonmetal soft chain, and the mounting end is a metal or nonmetal mounting end.
Compared with the prior art, the beneficial effects of the utility model are as follows:
the utility model discloses a swing movable joint is the spherical crown face, can improve the packing density of plug in tubular product die cavity, realizes the effect that is close to full packing, and higher plug packing density is favorable to restraining the shaping defects such as return bend wrinkling and the oval distortion of cross section, and then improves shaping quality;
the core rod is composed of a plurality of core balls (or movable joints), the shape, the size and the space orientation of the contact surface among the core balls (or movable joints) determine the matching precision and the swinging flexibility of the whole core rod, and the swinging movable joint of the utility model is a spherical crown surface, thereby improving the swinging and bending flexibility and flexibility of the core rod in a three-dimensional space; the spherical crown surface (without a flat bottom) can improve the matching precision between the movable joints and increase the swinging flexibility of the core rod;
thirdly, the core rod of the utility model has simple structure, short manufacturing and assembling procedures of the movable joint and convenient operation.
Of course, it is not necessary for any particular product to achieve all of the above-described advantages at the same time.
Drawings
Fig. 1 is a schematic structural diagram of a tube space three-dimensional bending full-filling flexible core rod according to an embodiment of the present invention;
fig. 2 is a schematic view of the principle of the swing type movable joint in the mandrel structure according to the embodiment of the present invention; FIG. 2a is a front view and FIG. 2b is a top view;
FIG. 3 is a schematic view of a pipeline curved in three dimensions;
the labels in the figure are: 1-swing type movable joint; 2-soft chain; 3-a pipe material; 4-mounting end; 5-adjusting the nut; 6-support section.
Detailed Description
The present invention will be further described with reference to the following specific examples. It should be understood that these examples are only for illustrating the present invention, and are not intended to limit the scope of the present invention. In practical applications, the improvement and adjustment made by those skilled in the art according to the present invention still belong to the protection scope of the present invention.
For better illustration of the present invention, the following detailed description of the present invention is provided in conjunction with the accompanying drawings.
In the prior art published at present, a rigid core rod structure can realize full filling of a pipe cavity, but the pipe cannot swing along with the rigid core rod structure when bending deformation occurs, the flexibility is poor, and the rigid core rod structure is not suitable for forming thin-wall pipes with small bending radii. The movable joint core rod has good structure flexibility, can deform along with the bending of the pipe, but cannot realize the full filling of the pipe cavity due to the limitation of the flexible structure. And the flexible swing in any direction of three-dimensional space is difficult to realize by the movable joint core rod structure.
A fully filled mandrel for pipe bend forming, see fig. 1-3, comprising: the swing type movable joint comprises a plurality of swing type movable joints 1, wherein a through hole is formed in the center of each swing type movable joint 1, and the swing type movable joints 1 are arranged into three-dimensional entities surrounded by two spherical crown curved surfaces;
the flexible chain 2 penetrates through the through hole to connect the swing type movable joints 1 in series;
and the mounting end 4 is connected with the pipe 3 bending forming equipment.
It can be understood that the utility model discloses a soft chain indicates the chain that has soft characteristic, can realize arbitrary angle bending.
Furthermore, the chain tensioning device further comprises an adjusting component, wherein the adjusting component can be an adjusting nut 5 in the prior art, and the adjusting nut 5 is arranged at the tail end of the soft chain and used for adjusting the tensioning degree of the soft chain and further adjusting the matched pressing force between the swing type movable joints. The adjustable tensioning degree of the soft chain can ensure the full filling of the core rod and also properly take account of the flexibility of the swing. Here, the adjusting component can be disposed at least one end of the flexible chain 2, in this embodiment, at the end of the flexible chain close to the installation end, but of course, at the other end, or at both ends, as long as the adjustment of the tension degree of the flexible chain can be realized.
Referring to fig. 1, the mounting end and the swing type movable joint may be connected by a support section 6, the support section 6 may be configured to include a straight cylinder portion connected to the mounting end and configured to support a straight pipe portion, a curved surface of the spherical crown curved portion is configured to match an inner curved surface of the swing type movable joint, and a through hole for a soft chain to pass through is also provided at an axial center of the support section 6 to connect the swing type movable joint and the support section.
Furthermore, each swing type movable joint 1 is a three-dimensional entity surrounded by two spherical crown curved surfaces with the same diameter, and the through hole is arranged in the direction of the connecting line of the spherical centers of the two spherical crown curved surfaces. By equal diameter is meant here that the spherical diameters of the two spherical cap surfaces are equal in order to ensure a full-filling effect and a precision of fit between the swing joints.
Furthermore, the spherical center distance of the curved surfaces of the two spherical crowns of the swing type movable joint 1 is adjusted to change the filling density of the whole flexible core rod structure in a pipe cavity, so that the flexible core rod structure is suitable for different pipe bending conditions. When the distance between the spherical centers of the two spherical crown curved surfaces is reduced, the filling density is increased, and in the limit, when the distance between the spherical centers of the two spherical crown curved surfaces is zero (the two spherical crown curved surfaces are superposed), the filling density is 100 percent (full filling). The filling density is determined according to the pipe forming parameters, and higher filling density is required for smaller wall thickness and smaller bending radius.
Further, the swing type movable joint 1, the soft chain 2 and the mounting end 4 include, but are not limited to, metal materials, such as non-metal materials like rubber and polyurethane.
The full-filling flexible core rod structure is characterized in that after the oscillating movable joint 1, the soft chain 2, the mounting end 4 and the adjusting nut 5 are assembled, the oscillating movable joint is fixed on a pipe bending forming device and is arranged in a cavity of a pipe 3. When the pipe 3 is subjected to three-dimensional bending deformation in space, the core rod deforms along with the bending of the pipe 3, and plays roles in supporting, guiding and driving, so that the thin-wall pipe is accurately bent and formed.
The core rod of the utility model can freely swing in any direction of the three-dimensional space while realizing the full filling of the pipe cavity, has good flexibility and strong universality, and has simple structure and convenient processing and assembly; the forming defects of bending wrinkling, elliptic cross section distortion and the like of the ultrathin-wall pipe can be effectively inhibited, and the accurate forming of the thin-wall pipe is realized.
The present invention will be further described below with reference to specific embodiments.
Examples
Referring to fig. 1, the flexible core rod structure has a plurality of swing type movable joints 1, referring to fig. 2, the swing type movable joints 1 are formed by two spherical crown curved surfaces with the same diameter, a through hole is processed in the direction of the connecting line of the spherical centers of the two spherical crown curved surfaces, and the diameter of the through hole is required to ensure that the flexible chain 2 can smoothly pass through the through hole. The diameter of the spherical crown is smaller than the inner diameter of the pipe 3, and the size of each swing type movable joint 1 and the filling density of the core rod structure in the cavity of the pipe can be controlled by adjusting the spherical center distance of the two spherical crowns. The central through hole of the swing type movable joint 1 penetrates through the soft chain 2 to connect all the swing type movable joints 1 in series. The tail end of the soft chain 2 is provided with an adjusting nut 5 for adjusting the tensioning degree of the soft chain 2 and further adjusting the matched pressing force between the swing type movable joints 1. The flexible core rod structure mounting end 4 is fixed on a pipe bending forming device (such as a three-dimensional free bending device, a numerical control bending device and the like). When the pipe 3 is bent and formed, the flexible core rod structure is arranged in a cavity of the pipe 3, and along with the three-dimensional bending deformation of the pipe 3 in the space, the flexible core rod structure deforms in a follow-up manner, and the supporting, guiding and transmission effects are completed. Referring to fig. 3, after the pipe 3 is bent and formed in a three-dimensional space, a three-dimensional pipeline with a complex shape can be prepared.
The utility model discloses a mandrel structure has solved the crooked problem that mandrel structure warp flexibility and packing density can't compromise in thin wall pipe three-dimensional space, can realize the bending of the ultra-thin wall tubular product that relative wall thickness (tubular product wall thickness and external diameter) is less than or equal to 0.01.
The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.
Claims (7)
1. A fully filled mandrel for use in bend forming of pipe, comprising: the center of each swing type movable joint is provided with a through hole, and the swing type movable joints are arranged into three-dimensional entities surrounded by two spherical crown curved surfaces;
the flexible chain penetrates through the through hole to connect the swing type movable joints in series;
the mounting end is connected with the pipe bending forming equipment;
the core rod is arranged in the pipe cavity, and when the pipe is bent and formed, the core rod structure deforms along with the pipe in a three-dimensional bending mode in space, and guiding, supporting and transmission effects are achieved.
2. The fully filled mandrel for tube bend forming of claim 1 further comprising an adjustment feature, said adjustment feature being disposed at a soft chain end.
3. The fully filled mandrel for pipe bending according to claim 1, wherein the mounting end is connected to the swing joint by a support section.
4. The fully filled mandrel for pipe bend forming of claim 3 wherein said support segment is configured to include a straight barrel portion and a spherical crown curvature; the straight-moving cylinder part is connected with the mounting end, and the curved surface of the spherical crown curved part is matched with the inner curved surface of the swing type movable joint.
5. The full-filled mandrel for pipe bending according to claim 1, wherein each of said swing joints is a three-dimensional solid surrounded by two spherical crown curved surfaces with the same diameter, and said through hole is arranged in the direction of the connecting line of the spherical centers of the two spherical crown curved surfaces.
6. The full-filling mandrel for pipe bending according to claim 1, wherein the distance between the centers of the two spherical crown curved surfaces of the swing type movable joint is adjusted to change the filling compactness of the whole flexible mandrel structure in the pipe cavity.
7. The full-filled mandrel for pipe bending according to claim 1, wherein the swing type movable joint is a metal or nonmetal swing type movable joint, the flexible chain is a metal or nonmetal flexible chain, and the mounting end is a metal or nonmetal mounting end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920651017.1U CN209969278U (en) | 2019-05-08 | 2019-05-08 | Full-filling core rod for bending and forming pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920651017.1U CN209969278U (en) | 2019-05-08 | 2019-05-08 | Full-filling core rod for bending and forming pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209969278U true CN209969278U (en) | 2020-01-21 |
Family
ID=69261386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920651017.1U Expired - Fee Related CN209969278U (en) | 2019-05-08 | 2019-05-08 | Full-filling core rod for bending and forming pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209969278U (en) |
-
2019
- 2019-05-08 CN CN201920651017.1U patent/CN209969278U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110788179B (en) | Forming method of oval bent pipe with complicated cross-section circumference change and pipe bending device | |
| CN106040811A (en) | Large-diameter corrugated pipe vibration forming device and method | |
| CN201482843U (en) | Core print device used for tube bending machine | |
| CN103752666A (en) | Bending method of pipes with flexible chained-ball mandrel | |
| CN100491010C (en) | Shaping method of small curvature radius bend pipe | |
| CN108435852A (en) | A kind of modularization pressure-adjustable Siphon Mandril | |
| CN101758126A (en) | Numeric control bending core mould of thin-wall tube with large diameter | |
| CN110576089B (en) | Particle filler assisted push-bending forming method for large-caliber small-bending-radius thin-wall bent pipe | |
| US11331709B1 (en) | Elastic double-support variable-diameter mandrel for bending of aircraft engine-specific metal conduit | |
| CN103769451A (en) | Minor radius bend forming method of ultrathin tubular product | |
| CN209969278U (en) | Full-filling core rod for bending and forming pipe | |
| CN110695157B (en) | Method for precisely processing sharp bend of titanium alloy thin-walled tube | |
| CN108555086A (en) | A kind of chain type bend pipe plug of variable-diameter | |
| CN108620466B (en) | Double-layer pipe numerical control bending die and forming method thereof | |
| CN110756631B (en) | Elbow core mold for elbow with variable section perimeter and elbow device | |
| CA2370780A1 (en) | Method for spin forming a tube | |
| US5214950A (en) | Method and apparatus for bending a multiple tube | |
| CN111957804B (en) | Device for liquid-filling bending forming of thin-walled tube and forming method thereof | |
| CN102161059A (en) | NC bending core head for thin walled tube of aluminum alloy with major diameter and design method thereof | |
| CN2237500Y (en) | Device for bending double layered metal pipe | |
| CN115582464A (en) | Flexible clamping bending forming device and forming method for pipe bending robot | |
| CN110883153B (en) | Composite flexible bending forming method for pipe | |
| CN203140563U (en) | Soft pipe-bending die in ball-and-socket joint structure | |
| CN107908809A (en) | A kind of three axis free bend moulds coordinate optimum design method with guiding mechanism | |
| CN113664075A (en) | Variable camber roll panel forming device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200121 |