CN105583293A - Metal pipe hole pulling technology - Google Patents
Metal pipe hole pulling technology Download PDFInfo
- Publication number
- CN105583293A CN105583293A CN201610063346.5A CN201610063346A CN105583293A CN 105583293 A CN105583293 A CN 105583293A CN 201610063346 A CN201610063346 A CN 201610063346A CN 105583293 A CN105583293 A CN 105583293A
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- CN
- China
- Prior art keywords
- hole
- copper pipe
- metal tube
- flange
- pulls out
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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
- B21D31/00—Other methods for working sheet metal, metal tubes, metal profiles
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Punching Or Piercing (AREA)
Abstract
The invention relates to a metal pipe hole pulling technology. The technology comprises the steps that firstly, positioning is conducted, and the position of a hole center is determined on a copper pipe needing to be subjected to hole pulling; secondly, trepanning is conducted, and an oval hole is formed in the position of the hole center of the copper pipe; thirdly, pipe clamping is conducted, a hole pulling hook is inserted into the oval hole of the copper pipe, the copper pipe is fixed through two clamps, and circular holes of the two clamps, the oval hole in the copper pipe and a rotating shaft of the hole pulling hook are concentrically arranged; and fourthly, hole pulling is conducted, the hole pulling hook is started to rotate at a high speed finally, the hole pulling hook is pulled upwards slowly, the edge of a pulled hole is turned outwards to form a flange, the flange is made to protrude out of the outer wall of the copper pipe, and hole pulling machining is finished. According to the copper pipe hole pulling technology, the flange of the pulled hole of the machined copper pipe can be made to protrude out of the outer wall of the copper pipe, and the pulled hole is in a flat opening round shape. During connection, a connecting copper pipe can be only inserted into the section of the flange, protruding out of the outer wall of the copper pipe, of the pulled hole and does not need to be inserted too deep, and therefore the inserting depth of the connecting copper pipe is greatly reduced, and the influence on the flow of a refrigerant of the copper pipe is lowered accordingly.
Description
Technical field
The present invention relates to pipe fitting and pull out hole technique, be specifically related to a kind of metal tube and pull out hole technique.
Background technology
In the production process of air-conditioning, heat pump, what refrigerant pipeline was the most frequently used is exactly copper tube, and connected mode between copper tube is multifarious especially, when wherein a kind of two more common close copper pipes of caliber are done T-shaped connection, perforate and perforate periphery flange pulls out hole technique on compared with large copper pipe. The most common for discharge, object is strengthen the intensity at the place of being welded to connect and facilitate welding operation.
Generally pull out at present hole technique, as depicted in figs. 1 and 2, flanging bore edge after processing all can be curved because of the pipe shaft circular arc of copper pipe, when two copper pipe welding, another root copper pipe need insert the complete and intensity of very dark guarantee solder side, but because insertion depth is large, cause managing interior reduced cross-sectional area, affect the flow of refrigerant, when flow velocity is large, also can produce noise.
Summary of the invention
The object of the invention is to overcome existing copper pipe and pull out copper pipe that hole technique processes and pull out the deficiency in hole and provide one to process and both can reduce copper pipe insertion depth, again can firm welding and the low copper pipe of production cost pull out hole technique.
The object of the present invention is achieved like this:
A kind of copper pipe pulls out hole technique, comprises the following steps:
Heart position, hole is first determined in step 1, location on the copper pipe that need to pull out hole;
Step 2, perforate, then an elliptical aperture is opened in the heart position, hole on copper pipe, and the major axis axial length of elliptical aperture and minor axis axial length are calculated gained according to the designed interior diameter that pulls out hole and the height of flange etc.;
Step 3, clamp, then hook in the elliptical aperture that inserts copper pipe pulling out hole, fix copper pipe with two fixtures, clamping place of two fixtures is respectively provided with semicircle orifice, after two fixture clampings, semicircle orifice on two fixtures is combined into a circular port, and the diameter of circular port is the overall diameter that pulls out hole, and makes the elliptical aperture on circular port, the copper pipe of two fixtures and pull out the rotating shaft that hole hooks to arrange with one heart;
Step 4, pull out hole, finally start and pull out hole and hook High Rotation Speed, and slowly upwards pull-out, finally pulling out under the extruding of hole hook and circular port, the edge that pulls out hole is outwards dug and formed flange and make it protrude the outer wall of copper pipe, pull out hole and machine, the hole of pulling out after processing is a flat mouth circular port.
The present invention can also do following further improvement.
The clamping pressure of described two fixtures is 900-1500N.
The stroke of described two fixtures is 25mm-50mm.
The described stroke that pulls out hole hook is 25mm-50mm.
The described rotating speed that pulls out hole hook is 1800-2000RPM.
The described external broach that pulls out hole hook is 250-300N.
The concrete steps of step 2 are that by punch ram out, punching is very easy for described elliptical aperture.
The concrete steps of step 2 are, described in pull out the diameter that outermost portion that hole hooks rotation forms and equal to pull out the internal diameter in hole.
The concrete steps of step 4 are, pulling out that hole hooks and the extruding of circular port under, pull out the edge in Gou Baba hole, hole and outwards dig the outer wall 3mm-30mm that forms flange and make its protrusion copper pipe.
In step 2, the major axis axial length of elliptical aperture and the computing formula of minor axis axial length are: the major axis axial length A=of elliptical aperture pulls out the height E of the flange of the thickness F-2 × long axis direction of hole interior diameter C+2 × flange, and the minor axis axial length B=of elliptical aperture pulls out the height E of the flange of the thickness F-2 × short-axis direction of hole interior diameter C+2 × flange. As from the foregoing, because the major axis axial length of elliptical aperture is greater than minor axis axial length, therefore the height H of the flange of short-axis direction is greater than the height E of the flange of long axis direction.
Certainly, copper pipe of the present invention pulls out hole technique and is also applicable to the metal tubes such as aluminum pipe.
The invention has the beneficial effects as follows:
The present invention be directed to existing copper pipe pull out hole processes out pull out the existing deficiency in hole and improved, copper pipe of the present invention pulls out the flange that pulls out hole that hole technique can make to process rear copper pipe and protrudes the outer wall of copper pipe, and be flat mouth circle, when connection, connecting copper pipe can only insert this section of the flange that pulls out hole of protruding copper pipe outer wall, and need not insert very deeply, thereby connecting copper pipe insertion depth is greatly reduced, thereby reduce the impact on copper pipe cold medium flux, the height that pulls out hole flanging that protrudes copper pipe outer wall is apparently higher than the height of copper pipe flange in the past, therefore the flange that pulls out hole that protrudes copper pipe outer wall can be served as the welding position of two copper pipes, thereby also can meet welding requirements, ensure weld strength. the present invention can reduce the insertion depth of connecting copper pipe significantly, do not affecting under the prerequisite of weld strength, reduce and inserted the impact of copper pipe on former copper pipe cold medium flux, can reduce the friction sound of refrigerant and copper pipe, also reduced the probability that produces noise, reduce the resistance of pipeline simultaneously, make refrigerant flow and be not obstructed, ensure cold medium flux.
Brief description of the drawings
Fig. 1 pulls out hole technique through existing copper pipe to pull out copper pipe behind hole and the syndeton schematic diagram of connecting copper pipe.
Fig. 2 is the side view of Fig. 1.
The flow chart that Fig. 3, Fig. 4, Fig. 5 are technique of the present invention.
Fig. 6 pulls out copper pipe behind hole and the syndeton schematic diagram of connecting copper pipe 5 through technique of the present invention.
Fig. 7 is the side view of Fig. 6.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described.
Embodiment mono-, as shown in Fig. 3 to Fig. 7, a kind of copper pipe pulls out hole technique, comprises the following steps:
Heart position, hole is first determined in step 1, location on the copper pipe 1 that need to pull out hole;
Step 2, perforate, then an elliptical aperture 11 is opened in the heart position, hole on copper pipe 1, and the major axis axial length A of elliptical aperture 11 and minor axis axial length B calculate gained according to height E and the F etc. of the designed interior diameter C that pulls out hole 12 and flange 15;
Step 3, clamp, then hook in the elliptical aperture 11 of 4 insertion copper pipes 1 pulling out hole, fix copper pipe 1 with two fixtures 2,3, clamping place of two fixtures 2,3 is respectively provided with semicircle orifice, after two fixture 2,3 clampings, semicircle orifice on two fixtures 2,3 is combined into a circular port 31, and the diameter of circular port 31 is the overall diameter D that pulls out hole 12, and makes the elliptical aperture 11 on circular port 31, the copper pipe 1 of two fixtures 2,3 and pull out hole to hook 4 rotating shaft and arrange with one heart;
Step 4, pull out hole, finally start the hole machine that pulls out, the hole of pulling out of pulling out on the machine of hole hooks 4 High Rotation Speeds, and slowly upwards pull-out, finally pulling out under the extruding of hole hook 4 and circular port, the edge that pulls out hole 12 is outwards dug and formed flange 15 and make it protrude the outer wall of copper pipe 1, pull out hole 12 and machine, the hole of pulling out after processing is a flat mouth circular port.
As the present invention's scheme more specifically.
The clamping pressure of described two fixtures is 900-1500N.
The stroke of described two fixtures is 25mm-50mm.
The described stroke that pulls out hole hook 4 is 25mm-50mm.
The described rotating speed that pulls out hole hook 4 is 1800-2000RPM.
The described external broach that pulls out hole hook 4 is 250-300N.
The concrete steps of step 2 are that described elliptical aperture 11 by punch ram out.
The concrete steps of step 3 are, pull out the diameter that outermost portions that hole hooks 4 rotations form and equal to pull out the interior diameter C in hole 12.
In step 2, the computing formula of the major axis axial length A of elliptical aperture and minor axis axial length B is: the major axis axial length A=of elliptical aperture pulls out the height E of the flange of the thickness F-2 × long axis direction of hole interior diameter C+2 × flange, and the minor axis axial length B=of elliptical aperture pulls out the height E of the flange of the thickness F-2 × short-axis direction of hole interior diameter C+2 × flange. As from the foregoing, because the major axis axial length A of elliptical aperture is greater than minor axis axial length B, therefore the height H of the flange 15 of short-axis direction is greater than the height E of the flange 15 of long axis direction.
The concrete steps of step 4 are, pulling out that hole hooks and the extruding of circular port under, pull out the edge in Gou Baba hole, hole and outwards dig the outer wall 3mm-30mm that forms flange 15 and make its protrusion copper pipe. Certainly, copper pipe of the present invention pulls out hole technique and is also applicable to the metal tubes such as aluminum pipe.
In the time that process of the present invention is pulled out copper pipe 1 behind hole and is connected with connecting copper pipe 5, connecting copper pipe 5 can only insert flange 15 these sections of protruding copper pipe 1 outer wall, and need not insert very deeply, thus connecting copper pipe 5 insertion depths are greatly reduced, thus the impact on the cold medium flux in former copper pipe 1 reduced. And the flange that pulls out hole that protrudes copper pipe outer wall can be served as the welding position of two copper pipes, thereby also can meet welding requirements, ensure weld strength. The present invention can reduce the insertion depth of connecting copper pipe 5 significantly, do not affecting under the prerequisite of weld strength, reduce the impact of connecting copper pipe 5 on the cold medium flux in former copper pipe 1, can reduce the friction sound of refrigerant and copper pipe, also reduced the probability that produces noise, reduce the resistance of pipeline simultaneously, make refrigerant flow and be not obstructed, ensure cold medium flux.
Claims (9)
1. metal tube pulls out a hole technique, it is characterized in that: comprise the following steps:
Heart position, hole is first determined in step 1, location on the metal tube that need to pull out hole;
Step 2, perforate, then an elliptical aperture is opened in the heart position, hole on metal tube, and the major axis axial length of elliptical aperture and minor axis axial length are calculated gained according to the designed interior diameter that pulls out hole and the height of flange etc.;
Step 3, clamp, then hook in the elliptical aperture that inserts metal tube pulling out hole, fix metal tube with two fixtures, clamping place of two fixtures is respectively provided with semicircle orifice, after two fixture clampings, semicircle orifice on two fixtures is combined into a circular port, and the diameter of circular port is the overall diameter that pulls out hole, and makes the elliptical aperture on circular port, the metal tube of two fixtures and pull out the rotating shaft that hole hooks to arrange with one heart;
Step 4, pull out hole, finally start and pull out hole and hook High Rotation Speed, and slowly upwards pull-out, finally pulling out under the extruding of hole hook and circular port, the edge that pulls out hole is outwards dug and formed flange and make it protrude the outer wall of metal tube, pull out hole and machine, the hole of pulling out after processing is a flat mouth circular port.
2. metal tube pulls out hole technique according to claim 1, it is characterized in that: the clamping pressure of described two fixtures is 900-1500N.
3. metal tube pulls out hole technique according to claim 1, it is characterized in that: the stroke of described two fixtures is 25mm-50mm.
4. metal tube pulls out hole technique according to claim 1, it is characterized in that: described in pull out hole hook stroke be 25mm-50mm.
5. metal tube pulls out hole technique according to claim 1, it is characterized in that: described in pull out hole hook rotating speed be 1800-2000RPM.
6. metal tube pulls out hole technique according to claim 1, it is characterized in that: described in pull out hole hook external broach be 250-300N.
7. metal tube pulls out hole technique according to claim 1, it is characterized in that: the concrete steps of step 2 are that described elliptical aperture by punch ram out.
8. metal tube pulls out hole technique according to claim 1, it is characterized in that: the concrete steps of step 4 are, pulling out that hole hooks and the extruding of circular port under, pull out the edge in Gou Baba hole, hole and outwards dig the outer wall 3mm-30mm that forms flange and make its protrusion metal tube.
9. metal tube pulls out hole technique according to claim 1, it is characterized in that: in step 2, the major axis axial length of elliptical aperture and the computing formula of minor axis axial length are: the major axis axial length A=of elliptical aperture pulls out the height E of the flange of the thickness F-2 × long axis direction of hole interior diameter C+2 × flange, and the minor axis axial length B=of elliptical aperture pulls out the height H of the flange of the thickness F-2 × short-axis direction of hole interior diameter C+2 × flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610063346.5A CN105583293A (en) | 2016-01-31 | 2016-01-31 | Metal pipe hole pulling technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610063346.5A CN105583293A (en) | 2016-01-31 | 2016-01-31 | Metal pipe hole pulling technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105583293A true CN105583293A (en) | 2016-05-18 |
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ID=55923408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610063346.5A Pending CN105583293A (en) | 2016-01-31 | 2016-01-31 | Metal pipe hole pulling technology |
Country Status (1)
| Country | Link |
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| CN (1) | CN105583293A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108971300A (en) * | 2018-09-03 | 2018-12-11 | 伏特机械科技（湖南）有限公司 | A kind of pipe fitting hole flanging machine |
| CN113523716A (en) * | 2021-06-22 | 2021-10-22 | 浙江中财管道科技股份有限公司 | Cold rolling device and cold rolling welding method for main pipe and branch pipe of stainless steel water separator |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2124954B (en) * | 1982-07-31 | 1985-08-07 | Behrens Ag C | Apparatus for making drawn holes in workpieces on a piercing press |
| US20050205827A1 (en) * | 2000-02-03 | 2005-09-22 | Shigeo Kitazawa | Ball valve and method for production thereof |
| CN200995251Y (en) * | 2006-12-30 | 2007-12-26 | 清华同方人工环境有限公司 | Turnup apparatus for muffler and technological pipe welding |
| CN103394881A (en) * | 2013-08-15 | 2013-11-20 | 北京隆盛泰科石油管科技有限公司 | Novel hot extrusion tee joint forming process |
| CN104139119A (en) * | 2014-06-29 | 2014-11-12 | 成都飞机工业（集团）有限责任公司 | Large-diameter high-temperature-resistant aluminum alloy pipe flanging method and large-diameter high-temperature-resistant aluminum alloy pipe flanging device |
-
2016
- 2016-01-31 CN CN201610063346.5A patent/CN105583293A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2124954B (en) * | 1982-07-31 | 1985-08-07 | Behrens Ag C | Apparatus for making drawn holes in workpieces on a piercing press |
| US20050205827A1 (en) * | 2000-02-03 | 2005-09-22 | Shigeo Kitazawa | Ball valve and method for production thereof |
| CN200995251Y (en) * | 2006-12-30 | 2007-12-26 | 清华同方人工环境有限公司 | Turnup apparatus for muffler and technological pipe welding |
| CN103394881A (en) * | 2013-08-15 | 2013-11-20 | 北京隆盛泰科石油管科技有限公司 | Novel hot extrusion tee joint forming process |
| CN104139119A (en) * | 2014-06-29 | 2014-11-12 | 成都飞机工业（集团）有限责任公司 | Large-diameter high-temperature-resistant aluminum alloy pipe flanging method and large-diameter high-temperature-resistant aluminum alloy pipe flanging device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108971300A (en) * | 2018-09-03 | 2018-12-11 | 伏特机械科技（湖南）有限公司 | A kind of pipe fitting hole flanging machine |
| CN113523716A (en) * | 2021-06-22 | 2021-10-22 | 浙江中财管道科技股份有限公司 | Cold rolling device and cold rolling welding method for main pipe and branch pipe of stainless steel water separator |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160518 |
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| WD01 | Invention patent application deemed withdrawn after publication |