CN107671151B - Pipe bending tool and pipe bending method - Google Patents
Pipe bending tool and pipe bending method Download PDFInfo
- Publication number
- CN107671151B CN107671151B CN201710952946.1A CN201710952946A CN107671151B CN 107671151 B CN107671151 B CN 107671151B CN 201710952946 A CN201710952946 A CN 201710952946A CN 107671151 B CN107671151 B CN 107671151B
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- pipe
- mold core
- thin
- bent
- bending
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/08—Bending rods, profiles, or tubes by passing between rollers or through a curved die
- B21D7/085—Bending rods, profiles, or tubes by passing between rollers or through a curved die by passing through a curved die
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/003—Positioning devices
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
The invention provides a pipe bending tool and a pipe bending method, and relates to the technical field of pipe fitting machining. A pipe bending tool comprising: the positioning plate is provided with a concave groove, and the length and the width of the concave groove are set according to the size requirement of a product to be bent; the first mold core is matched with the concave groove and detachably connected with the positioning plate, the first mold core comprises a bent pipe part, and the shape of the bent pipe part is set according to the shape of a bent part of a product to be bent; the second mold core comprises a guide part for limiting the trend of the thin-wall pipe; the fastening device is used for pushing the thin-wall pipe and enabling the thin-wall pipe to be attached to the bent pipe part of the first mold core; the first molding channels for product molding are formed among the first mold cores and between part of the first mold cores and part of the second mold cores, and the width of the first molding channels is the same as the thickness of the thin-walled tube. The pipe bending method can ensure that the thin-wall pipe is manufactured in a high-precision and atraumatic way by using the pipe bending tool.
Description
Technical Field
The invention relates to the technical field of pipe fitting processing, in particular to a pipe bending tool and a pipe bending method.
Background
Some types of cooling water pipes are formed by pressing small-caliber thin-wall pipes, if a conventional pipe bending method is adopted, only one pipe bending shape can be bent in one pipe bending process, and the conventional pipe bending method cannot be realized at all for products with extremely high dimensional precision requirements and inter-pipe form and position tolerance requirements.
In more detail, the following problems exist after the thin-walled tube is processed by the common bending means:
the surface of the workpiece is easy to generate defects;
the size of the parts is difficult to ensure.
However, the bent pipe with the problems cannot meet the subsequent assembly requirements.
Disclosure of Invention
The invention aims to provide a pipe bending tool which can be used for bending and forming thin-wall pipe fittings.
Another object of the present invention is to provide a pipe bending method, which can ensure the forming of a thin-wall pipe and ensure a good forming precision by using the pipe bending tool.
Embodiments of the present invention are implemented as follows:
an embodiment of the present invention provides a pipe bending tool, including:
the positioning plate is provided with a concave groove, and the length and the width of the concave groove are set according to the size requirement of a product to be bent;
the first mold core is matched with the concave groove and detachably connected with the positioning plate, the first mold core comprises a bent pipe part, and the shape of the bent pipe part is set according to the shape of a bent part of a product to be bent;
the second mold core comprises a guide part for limiting the trend of the thin-wall pipe; and
the fastening device is used for pushing the thin-wall pipe and enabling the thin-wall pipe to be attached to the bent pipe part of the first mold core;
the number of the first mold cores and the number of the second mold cores are all multiple, a plurality of first mold cores are mutually, a part of first mold cores and a part of second mold cores form a first molding channel for product molding, and the width of the first molding channel is the same as the thickness of the thin-wall pipe.
In addition, the pipe bending tool provided by the embodiment of the invention can also have the following additional technical characteristics:
in an alternative embodiment of the invention, the pipe bending tool further comprises a forming device, the forming device comprises a first pushing piece and a third mold core, the positioning plate is provided with a guide groove for moving the third mold core, the third mold core is matched with one second mold core, the pushing piece can enable the third mold core to move towards the second mold core along the guide groove, and a second forming channel for bending a thin-wall pipe is formed by the third mold core and the second mold core.
In an alternative embodiment of the invention, the fastening device comprises a second pusher and a pressing portion, the second pusher being adapted to move the pressing portion towards the elbow portion.
In an alternative embodiment of the invention, the pressing portion includes a limiting portion having the same width as the thickness of the thin-walled tube.
In an alternative embodiment of the present invention, the pipe bending tool further includes a base, and the positioning plate is disposed on the base.
In an alternative embodiment of the present invention, the positioning plate and the base are provided with a plurality of mounting holes at portions of both sides of the first mold core, and the fastening device can be disposed in the mounting holes.
An embodiment of the present invention provides a method of bending a pipe, the method using the pipe bending tool of any one of the above, the method comprising the steps of:
installing a first mold core, and bending the thin-wall pipe along the contour of the first mold core;
attaching the thin-wall pipe to the bent pipe part by using a fastening device;
repeating the steps until the thin-wall pipe is bent along the last first mold core;
and bending the long side part of the product by using the installed first mold core.
In an alternative embodiment of the invention, adjacent first mould cores are mounted in a staggered manner, and the bent pipe parts of two first mould cores which are spaced are flush.
In alternative embodiments of the invention, the shape of the first mould core is partly identical or entirely different.
In an alternative embodiment of the invention, the fastening device comprises a second pushing member and an extrusion part, the second pushing member comprises a base body and a feeding bolt, the feeding bolt is in threaded connection with the base body, one end of the feeding bolt is rotatably clamped with the extrusion part, and the extrusion part can move along with the feeding bolt, and the movement direction is the axis direction of the feeding bolt.
The beneficial effects of the invention are as follows:
the bending method can bend the thin-wall pipe, and can ensure smooth bending and forming of the product by matching with a corresponding pipe bending tool, and the precision is guaranteed. And finally, the bent product has no other defects such as concave and the like, and is convenient to take out. Meanwhile, under the guidance of the pipe bending method, a plurality of sectional materials with similar shapes can be bent by matching with a pipe bending tool, so that the pipe bending method has better universality and is very beneficial to the cost control of product production.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a tool for bending tubing provided by an embodiment of the present invention;
FIG. 2 is a cross-sectional view taken along the direction A-A of FIG. 1;
FIG. 3 is a schematic illustration of the pipe bending process of the pipe bending tool of FIG. 1;
FIG. 4 is a schematic view of a locating plate;
FIG. 5 is a schematic view of a base;
FIG. 6 is a schematic view of a fastening device extruding a thin walled tube;
FIG. 7 is a schematic view of the second pusher engaging the press portion;
fig. 8 is a schematic view of the appearance of the thin-walled tube after being formed.
Icon: 100-pipe bending tool; 10-positioning plates; 11-concave grooves; 13-a guide groove; 15-mounting holes; 30-a first mold core; 31-a bent pipe part; 40-a second mold core; 41-a guide; 50-fastening means; 51-a second propulsion member; 512-a base; 513-feeding bolts; 53-an extrusion part; 532—a limit part; 60-forming device; 61-a first pusher; 63-a third mold core; 80-a base; 101-pins; 102-a first molding channel; 103-a second molding channel; 1000-thin wall pipe fitting.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, the orientation or positional relationship indicated by the term "upper" is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the inventive product is conventionally put in use, only for convenience of describing the present invention and simplifying the description, and does not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Example 1
Referring to fig. 1 to 8, a tool 100 for bending a pipe and a method for bending a pipe are provided in the present embodiment. The pipe bending tool 100 includes:
the positioning plate 10 is provided with a concave groove 11, and the length and the width of the concave groove 11 are set according to the size requirement of a product to be bent;
the first mold core 30, the first mold core 30 is matched with the concave groove 11 and is detachably connected with the positioning plate 10, the first mold core 30 comprises a bent pipe part 31, and the shape of the bent pipe part 31 is set according to the shape of a bending part of a product to be bent;
a second mold core 40, the second mold core 40 comprising a guide portion 41 for restricting the trend of the thin-walled tube; and
the fastening device 50, the fastening device 50 is used for pushing the thin-walled pipe and enabling the thin-walled pipe to be attached to the bent pipe portion 31 of the first mold core 30;
the number of the first mold cores 30 and the second mold cores 40 is plural, and the first mold cores 30 and the second mold cores 40 form a first molding channel 102 for molding products, wherein the width of the first molding channel 102 is the same as the thickness of the thin-walled tube.
In this embodiment, the bent pipe portion 31 has a U-shape.
Wherein the shape of the first mold core 30 is partially identical or completely different. The first mold core 30 is a mold core having a substantially elongated shape, and is collectively referred to as a first mold core 30 for convenience of description. Depending on the shape of the bent product, a slightly varying shape of the first mold core 30 may be provided, such as a different corner radius of the bent pipe portion 31 or a different width of the entire first mold core 30. The shape of the corresponding other cores may vary as well, but the main method of bending is described below.
In the present embodiment, for distinction, the first cores 30 may be numbered sequentially in the order of bending, as shown in the drawing.
Wherein, adjacent first mold cores 30 are installed in a staggered way, and the bent pipe parts 31 of two spaced first mold cores 30 are flush. This allows the long side portion of the product to be held flush with the flush first core 30 while the long side portion is being bent, to ensure flatness of the long side portion. Incidentally, flush means that the bottom straight portions of the U-shaped bent pipe portion 31 are coplanar.
The pipe bending tool 100 further comprises a forming device 60, the forming device 60 being mainly used for forming the end of the long side of the product. The forming device 60 comprises a first pushing member 61 and a third mould core 63, the positioning plate 10 is provided with a guide groove 13 for moving the third mould core 63, the third mould core 63 is matched with one second mould core 40, and the pushing member can enable the third mould core 63 to move towards the second mould core 40 along the guide groove 13 and form a second forming channel 103 for forming the thin-walled tube together with the second mould core 40.
The fastening device 50 comprises a second pusher 51 and a pressing portion 53, the second pusher 51 being adapted to move the pressing portion 53 towards the elbow 31.
The pressing portion 53 includes a limiting portion 532, and the width of the limiting portion 532 is the same as the thickness of the thin-walled tube.
In the present embodiment, the cooperation of the first pusher 61 of the molding device 60 with the third mold core 63, the cooperation of the second pusher 51 of the fastening device 50 with the pressing portion 53 is similar. Both the first pushing member 61 and the second pushing member 51 are fed by using bolts. In use, the bolts are held by the two pins 101, so that when the bolts are rotated, neither the third mold core 63 nor the pressing portion 53 is rotated but the bolts are linearly moved in accordance with the rotation of the bolts. And by adopting the screw feeding mode, the damage to the thin-wall pipe caused by the excessive extrusion force can be avoided, because the third mold core 63 or the extrusion part 53 can be pushed a small distance only by one rotation of the bolt.
In detail, the second urging member 51 is exemplified. The second pushing member 51 includes a base 512 and a feed bolt 513, the feed bolt 513 is screwed to the base 512, one end of the feed bolt 513 is rotatably clamped to the pressing portion 53, and the pressing portion 53 is capable of moving along with the feed bolt 513 in an axial direction of the feed bolt 513.
In this embodiment, the pipe bending tool 100 further includes a base 80, and the positioning plate 10 is disposed on the base 80.
The positioning plate 10 and the portions of the base 80 located at both sides of the first mold core 30 are each provided with a plurality of mounting holes 15, and the fastening device 50 can be provided at the mounting holes 15.
In particular, when the thickness of the positioning plate 10 is designed to be sufficiently thick, the positioning plate 10 itself can also function as the base 80 and have sufficient stability. The purpose of the special setting of the base 80 is to be able to cooperate with different positioning plates 10 with a single base 80. And the positioning plate 10 is different depending on the shape of the product to be bent.
In this way, the corresponding positioning plate 10 and the matched various mold cores can be prefabricated according to the shape of the product which is often required to be bent, so that the pipe bending tool 100 can process cooling water pipes with various sizes.
The pipe bending method using the pipe bending tool 100 is as follows:
installing a first mold core 30, and bending the thin-wall pipe along the contour of the first mold core 30;
attaching the thin-walled tube to the bent tube portion 31 by the fastening means 50;
repeating the steps until the thin-wall pipe is bent along the last first mold core 30;
the long side portion of the product is bent using the installed first mold core 30.
Specifically, the drawings are taken as examples, and the numbers are according to the drawings. For the first mold core 30, only the mold core No. 0 is first installed, and bolts are selected as fixing pieces during installation. The thin walled tube is placed vertically on the locating plate 10. The fastening device 50 is placed in the mounting hole 15 adjacent to the number 0 die core, and the thin-walled tube can be gradually pushed and compacted with the bent pipe portion 31 by adjusting the fastening device 50, so that the thin-walled tube is continuously bent in the arrow direction in the drawing.
Due to the effect of the limiting part 532, the extruding part 53 cannot continue to travel after the limiting part 532 abuts against the No. 0 mold core. The width of the space enclosed between the pressing portion 53 and the bent portion 31 is identical to the width of the limiting portion 532, so that the thin-walled tube can be accommodated, and the thin-walled tube is not deformed by pressing.
After the bending of one section is finished, the No. 1 mold core is continuously installed according to the number, the thin-wall pipe is bent, the fastening device 50 is taken out from the previous installation hole 15 and is put into the installation hole 15 beside the No. 1 mold core, the pushing step is repeated, the thin-wall pipe is continuously bent according to the arrow direction, and the thin-wall pipe is tightly attached to the No. 1 mold core.
And (5) bending according to the steps until the installation of the last No. 10 mold core is finished and the thin-wall pipe is manufactured.
The last section of the thin-walled tube 1000 in this embodiment is called the long side, and since the first mold core 30 is partially flush during installation as described above, the flush portion is directly used for extrusion during bending of the long side.
The end portion of the long side is also required to be bent, which is the final forming portion of the whole product bent, and the first pushing member 61 and the third mold core 63 of the forming device 60 are matched with the second mold core 40 to be pushed and bent. Due to the guide groove 13, the dislocation is not pushed during bending, and after the dislocation is pushed to a certain degree, the guide groove 13 has a limiting effect on the third mold core 63, so that the width of the second molding channel 103 is consistent with the thickness of the thin-wall pipe, and the thin-wall pipe is not damaged. Finally, the bending of the thin-walled tube 1000 is completed, and the first mold core 30 is removed to take out the product.
Because the concave groove 11 on the positioning plate 10 and the corresponding dry mold core are provided with the dimensional tolerance according to the requirement of the product, which is generally 1/3 of the form and position tolerance of the product, the form and position tolerance of the bent product can be well controlled, and the precision of the product is ensured.
In summary, by the pipe bending method of the present invention, the thin-walled pipe can be bent, and the smooth bending and forming of the product can be ensured, and the precision is ensured, in cooperation with the corresponding pipe bending tool 100. And finally, the bent product has no other defects such as concave and the like. Meanwhile, under the guidance of the pipe bending method, a plurality of sectional materials with similar shapes can be bent by matching with the pipe bending tool 100, so that the pipe bending method has better universality and is very beneficial to the cost control of product production.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A tool for bending a pipe, comprising:
the positioning plate is provided with a concave groove, and the length and the width of the concave groove are set according to the size requirement of a product to be bent;
the first mold core is matched with the concave groove and detachably connected with the positioning plate, the first mold core comprises a bent pipe part, and the shape of the bent pipe part is set according to the shape of a bent part of a product to be bent;
the second mold core comprises a guide part for limiting the trend of the thin-wall pipe;
the fastening device is used for pushing the thin-wall pipe and enabling the thin-wall pipe to be attached to the bent pipe part of the first mold core;
the forming device comprises a first pushing piece and a third mold core, the positioning plate is provided with a guide groove for the movement of the third mold core, the third mold core is matched with one second mold core, the pushing piece can enable the third mold core to move towards the second mold core along the guide groove, and a second forming channel for bending a thin-wall pipe is formed by the third mold core and the second mold core;
the number of the first mold cores and the number of the second mold cores are multiple, a first molding channel for product molding is formed between the first mold cores and part of the second mold cores, and the width of the first molding channel is the same as the thickness of the thin-wall pipe;
the fastening device comprises a second pushing member and a pressing portion, wherein the second pushing member is used for enabling the pressing portion to move towards the bent pipe portion.
2. The tool for bending a tube according to claim 1, wherein the pressing portion includes a stopper portion having a width equal to a thickness of the thin-walled tube.
3. The tool for bending a pipe according to claim 1, further comprising a base, wherein the locating plate is disposed on the base.
4. A tool for pipe bending according to claim 3, wherein the positioning plate and the base are provided with a plurality of mounting holes in the portions of the base on both sides of the first mould core, and the fastening means is arranged in the mounting holes.
5. A method of bending tubing, wherein the method uses a tool for bending tubing according to any one of claims 1-4, the method comprising the steps of:
installing a first mold core, and bending the thin-wall pipe along the contour of the first mold core;
attaching the thin-wall pipe to the bent pipe part by using a fastening device;
repeating the steps until the thin-wall pipe is bent along the last first mold core;
and bending the long side part of the product by using the installed first mold core.
6. The method of bending a pipe according to claim 5, wherein adjacent first cores are mounted offset and the bent pipe portions of two first cores spaced apart are flush.
7. The method of bending a pipe according to claim 5, wherein the first mold cores are partially identical or all different in shape.
8. The method of bending a pipe according to claim 5, wherein the fastening device comprises a second pushing member and an extrusion portion, the second pushing member comprises a base and a feed bolt, the feed bolt is in threaded connection with the base, one end of the feed bolt is rotatably clamped to the extrusion portion, the extrusion portion can move along with the feed bolt, and the moving direction is the axial direction of the feed bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710952946.1A CN107671151B (en) | 2017-10-13 | 2017-10-13 | Pipe bending tool and pipe bending method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710952946.1A CN107671151B (en) | 2017-10-13 | 2017-10-13 | Pipe bending tool and pipe bending method |
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| Publication Number | Publication Date |
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| CN107671151A CN107671151A (en) | 2018-02-09 |
| CN107671151B true CN107671151B (en) | 2023-10-13 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7002364B2 (en) * | 2018-03-01 | 2022-01-20 | 三桜工業株式会社 | Bending mold |
| CN108213217A (en) * | 2018-03-20 | 2018-06-29 | 安庆三维电器有限公司 | Pipe shaping mould and tooling |
| CN111958197B (en) * | 2020-08-17 | 2022-04-22 | 青岛恒恩智能装备有限公司 | Continuous production method and equipment for forming and applying built-in condenser |
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|---|---|
| CN107671151A (en) | 2018-02-09 |
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