CN111014385A - Manufacturing process of U-shaped aluminum pipe - Google Patents
Manufacturing process of U-shaped aluminum pipe Download PDFInfo
- Publication number
- CN111014385A CN111014385A CN201811178146.XA CN201811178146A CN111014385A CN 111014385 A CN111014385 A CN 111014385A CN 201811178146 A CN201811178146 A CN 201811178146A CN 111014385 A CN111014385 A CN 111014385A
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- CN
- China
- Prior art keywords
- aluminum pipe
- bending
- core rod
- pipe body
- section
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- 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.)
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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
- B21D9/00—Bending tubes using mandrels or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
-
- 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
- B21D53/00—Making other particular articles
- B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
- B21D53/06—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of metal tubes
Abstract
The invention belongs to the technical field of aluminum pipe manufacturing, and particularly relates to a manufacturing process of a U-shaped aluminum pipe, which comprises the following steps: step 1, bending pretreatment: removing burrs at the end port of the aluminum pipe, and then placing the aluminum pipe on bending equipment; step 2, inserting a core rod: inserting a core rod into the aluminum pipe body from one end of the aluminum pipe, wherein the end part of the insertion end of the core rod is flush with the starting point of the bending section of the aluminum pipe, and the outer diameter of the core rod is consistent with the inner diameter of the pipe body; step 3, bending the aluminum pipe: starting the bending equipment, extruding and bending the aluminum pipe body by a bending die of the bending equipment, wherein in the bending process, the core rod is always pulled out of the aluminum pipe body backwards along the tangential direction of the bending position of the bending section of the aluminum pipe, the pulling speed of the core rod is consistent with the bending speed of the bending die and keeps synchronous, and after the bending section of the aluminum pipe is formed, the core rod is pulled out of the aluminum pipe body; step 4, checking: the inner diameter, the outer diameter and the circumference of the bending section of the aluminum pipe after being bent are inspected, the production efficiency is high, and the bending section of the pipe body is not deformed.
Description
Technical Field
The invention belongs to the technical field of aluminum pipe manufacturing, and particularly relates to a manufacturing process of a U-shaped aluminum pipe.
Background
The evaporator and the heat exchanger are widely applied to the industries of electric power, chemical engineering and the like as heat exchange equipment. The U-shaped aluminum pipe is an essential important element in heat exchange pipelines of evaporators and heat exchangers. The existing U-shaped aluminum pipe production has two processes, the first process adopts a bending die or bending equipment to directly bend the aluminum pipe, the forming speed is high, the forming efficiency is high, but in the bending forming process, the pipe body section at the bending part of the aluminum pipe is easy to deform from a circular shape to an elliptical shape, so that the resistance at the bending part is large, the service life of the U-shaped pipe is reduced, and the use effect of an evaporator and a heat exchanger is influenced; the second type, the shaping of buckling is assisted to intraductal packing quartz sand, through filling quartz sand at the body, avoids the body to warp when the shaping of buckling, and the drawback that this kind of method exists is that production speed is slow, inefficiency, and has improved the cost of production. Therefore, how to avoid deformation in the forming of the U-shaped aluminum pipe and have high production efficiency is a problem to be solved.
Disclosure of Invention
The invention aims to solve the technical problem of providing a manufacturing process of a U-shaped aluminum pipe, which has high production efficiency and no deformation of a bent section of the pipe body.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a manufacturing process of a U-shaped aluminum pipe comprises the following steps:
step 1, bending pretreatment: selecting an aluminum pipe according to requirements, removing burrs at the end port of the aluminum pipe, and then placing the aluminum pipe on bending equipment;
step 2, inserting a core rod: inserting a core rod into the aluminum pipe body from one end of the aluminum pipe, wherein the end part of the insertion end of the core rod is flush with the starting point of the bending section of the aluminum pipe, and the outer diameter of the core rod is consistent with the inner diameter of the pipe body;
step 3, bending the aluminum pipe: starting the bending equipment, extruding and bending the aluminum pipe body by a bending die of the bending equipment, wherein in the bending process, the core rod is always pulled out of the aluminum pipe body backwards along the tangential direction of the bending position of the bending section of the aluminum pipe, the pulling speed of the core rod is consistent with the bending speed of the bending die and keeps synchronous, and after the bending section of the aluminum pipe is formed, the core rod is pulled out of the aluminum pipe body;
step 4, checking: and (4) checking the inner diameter, the outer diameter and the circumference of the bent section of the aluminum pipe after being bent.
Furthermore, the fit clearance between the outer diameter of the core rod and the inner diameter of the aluminum pipe is 0.05-0.10 mm.
The invention has the beneficial effects that: by adopting the scheme, the core rod is adopted to support the bending of the inner part of the aluminum pipe, the section of the bending section of the U-shaped aluminum pipe is not deformed, the shape and the inner and outer diameter sizes of the section are better, the bending section of the U-shaped aluminum pipe has better quality precision and higher structural strength, the insertion and extraction operation of the core rod is convenient, the production of the U-shaped aluminum pipe can keep higher production efficiency, and the production cost is reduced.
Detailed Description
Example 1: a manufacturing process of a U-shaped aluminum pipe comprises the following steps:
step 1, bending pretreatment: selecting an aluminum pipe with a corresponding specification according to use requirements, removing burrs at the end port of the aluminum pipe, and then placing the aluminum pipe on bending equipment;
step 2, inserting a core rod: inserting a core rod into an aluminum pipe body from one end of the aluminum pipe, wherein the end part of the insertion end of the core rod is flush with the starting point of the aluminum pipe bending section, namely the end part of the insertion end of the core rod is the end part of the aluminum pipe bending section, the outer diameter of the core rod is consistent with the inner diameter of the pipe body, the fit clearance between the outer diameter of the core rod and the inner diameter of the pipe body is 0.06mm, the core rod is in sliding fit with the interior of the aluminum pipe, the core rod can support the aluminum pipe in the aluminum pipe, the fit clearance not only ensures the sliding fit, but also improves the support effect of the core;
step 3, bending the aluminum pipe: starting the bending device, extruding and bending the aluminum pipe body by a bending die of the bending device, wherein in the bending process, the core rod is always pulled out of the aluminum pipe backwards along the tangential direction of the bending position of the bending section of the aluminum pipe, namely, the core rod is pulled out once backwards every time the bending die acts, the core rod is always pulled out along the external tangent direction of the bending position, and in the bending process, because of the internal support of the core rod, the inner wall and the outer wall of the aluminum pipe keep better circumferential degree and inner and outer diameter sizes, the bending section of the formed aluminum pipe keeps better sectional shape and inner and outer diameters, the resistance of fluid at the position is reduced, the pressure of the pipe body at the bending section is reduced, the U-shaped pipe has better structural strength, the pulling speed of the core rod is consistent with the bending speed of the bending die, the synchronization is kept, in the continuous bending process, the speed of the core rod is consistent with the bending die, and the core rod, the aluminum pipe bending forming process has the advantages that the aluminum pipe bending forming is smooth and rapid, the production efficiency is high, the core rod is drawn out from the aluminum pipe body after the aluminum pipe bending section is formed, compared with the existing forming process, the forming precision of the U-shaped pipe in forming and after forming is guaranteed, the quality of the U-shaped pipe is high, the pipe body is not deformed, the structural strength is high, meanwhile, the production efficiency is high, the production requirement of efficient production efficiency is met, the size of the core rod is adjusted to the specification of the aluminum pipe, and the adaptability is high.
Step 4, checking: and the inner diameter, the outer diameter and the circumference of the bent section of the aluminum pipe after being bent are checked, and the precision and the quality of the formed U-shaped pipe are ensured.
Example 2: a manufacturing process of a U-shaped aluminum pipe comprises the following steps:
step 1, bending pretreatment: selecting an aluminum pipe with a corresponding specification according to use requirements, shaping an inner hole of the aluminum pipe, removing burrs at the end port of the aluminum pipe, ensuring the quality precision of the inner hole of the aluminum pipe, and then placing the aluminum pipe on bending equipment;
step 2, inserting a core rod: the method comprises the following steps of inserting a core rod into an aluminum pipe body from one end of the aluminum pipe, wherein the end part of the insertion end of the core rod is flush with the starting point of the aluminum pipe bending section, namely the end part of the insertion end of the core rod is the end part of the aluminum pipe bending section, the outer diameter of the core rod is consistent with the inner diameter of the pipe body, the fit clearance between the outer diameter of the core rod and the inner diameter of the pipe body is 0.10mm, the core rod is in sliding fit with the inner part of the aluminum pipe, the inner wall of the aluminum pipe keeps good quality precision in preorder processing, the core rod can be inserted conveniently, meanwhile, the core rod can support the aluminum pipe in the aluminum pipe, the aluminum pipe is better in support effect, the fit clearance ensures sliding;
step 3, bending the aluminum pipe: starting the bending device, extruding and bending the aluminum pipe body by a bending die of the bending device, wherein in the bending process, the core rod is always pulled out of the aluminum pipe backwards along the tangential direction of the bending position of the bending section of the aluminum pipe, namely, the core rod is pulled out once backwards every time the bending die acts, the core rod is always pulled out along the external tangent direction of the bending position, and in the bending process, because of the internal support of the core rod, the inner wall and the outer wall of the aluminum pipe keep better circumferential degree and inner and outer diameter sizes, the bending section of the formed aluminum pipe keeps better sectional shape and inner and outer diameters, the resistance of fluid at the position is reduced, the pressure of the pipe body at the bending section is reduced, the U-shaped pipe has better structural strength, the pulling speed of the core rod is consistent with the bending speed of the bending die, the synchronization is kept, in the continuous bending process, the speed of the core rod is consistent with the bending die, and the core rod, the aluminum pipe bending forming process has the advantages that the aluminum pipe bending forming is smooth and rapid, the production efficiency is high, the core rod is drawn out from the aluminum pipe body after the aluminum pipe bending section is formed, compared with the existing forming process, the forming precision of the U-shaped pipe in forming and after forming is guaranteed, the quality of the U-shaped pipe is high, the pipe body is not deformed, the structural strength is high, meanwhile, the production efficiency is high, the production requirement of efficient production efficiency is met, the size of the core rod is adjusted to the specification of the aluminum pipe, and the adaptability is high.
Step 4, checking: and the inner diameter, the outer diameter and the circumference of the bent section of the aluminum pipe after being bent are checked, and the precision and the quality of the formed U-shaped pipe are ensured.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiment according to the present invention are within the scope of the present invention.
Claims (2)
1. A manufacturing process of a U-shaped aluminum pipe is characterized by comprising the following steps:
step 1, bending pretreatment: selecting an aluminum pipe according to requirements, removing burrs at the end port of the aluminum pipe, and then placing the aluminum pipe on bending equipment;
step 2, inserting a core rod: inserting a core rod into the aluminum pipe body from one end of the aluminum pipe, wherein the end part of the insertion end of the core rod is flush with the starting point of the bending section of the aluminum pipe, and the outer diameter of the core rod is consistent with the inner diameter of the pipe body;
step 3, bending the aluminum pipe: starting the bending equipment, extruding and bending the aluminum pipe body by a bending die of the bending equipment, wherein in the bending process, the core rod is always pulled out of the aluminum pipe body backwards along the tangential direction of the bending position of the bending section of the aluminum pipe, the pulling speed of the core rod is consistent with the bending speed of the bending die and keeps synchronous, and after the bending section of the aluminum pipe is formed, the core rod is pulled out of the aluminum pipe body;
step 4, checking: and (4) checking the inner diameter, the outer diameter and the circumference of the bent section of the aluminum pipe after being bent.
2. A process for manufacturing a U-shaped aluminum pipe according to claim 1 wherein the fitting clearance between the outer diameter of the mandrel and the inner diameter of the aluminum pipe is 0.05 to 0.10 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811178146.XA CN111014385A (en) | 2018-10-10 | 2018-10-10 | Manufacturing process of U-shaped aluminum pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811178146.XA CN111014385A (en) | 2018-10-10 | 2018-10-10 | Manufacturing process of U-shaped aluminum pipe |
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| CN111014385A true CN111014385A (en) | 2020-04-17 |
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| CN201811178146.XA Pending CN111014385A (en) | 2018-10-10 | 2018-10-10 | Manufacturing process of U-shaped aluminum pipe |
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| CN (1) | CN111014385A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111644810A (en) * | 2020-05-22 | 2020-09-11 | 吴明伟 | Manufacturing process of U-shaped aluminum pipe |
| CN111659817A (en) * | 2020-05-22 | 2020-09-15 | 王明 | Manufacturing process of U-shaped aluminum pipe |
| CN112024667A (en) * | 2020-08-18 | 2020-12-04 | 新昌县开铭制冷配件有限公司 | Method for processing U-shaped pipe |
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2018
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Patent Citations (13)
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| US20040011106A1 (en) * | 2002-03-15 | 2004-01-22 | Calsonic Kansei Corporation | Pipe bending processing apparatus and pipe bending processing method |
| CN101234466A (en) * | 2008-03-11 | 2008-08-06 | 无锡曙光模具有限公司 | Vehicle rear axle assembly breast beam production method and special-purpose mold therefor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111644810A (en) * | 2020-05-22 | 2020-09-11 | 吴明伟 | Manufacturing process of U-shaped aluminum pipe |
| CN111659817A (en) * | 2020-05-22 | 2020-09-15 | 王明 | Manufacturing process of U-shaped aluminum pipe |
| CN112024667A (en) * | 2020-08-18 | 2020-12-04 | 新昌县开铭制冷配件有限公司 | Method for processing U-shaped pipe |
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Application publication date: 20200417 |
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