CN104841786A - Pipe expanding machine and flaring sleeve thereof - Google Patents
Pipe expanding machine and flaring sleeve thereof Download PDFInfo
- Publication number
- CN104841786A CN104841786A CN201410050767.5A CN201410050767A CN104841786A CN 104841786 A CN104841786 A CN 104841786A CN 201410050767 A CN201410050767 A CN 201410050767A CN 104841786 A CN104841786 A CN 104841786A
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- China
- Prior art keywords
- sleeve
- enlarging
- tube expander
- electric tube
- pipe
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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
- B21D41/00—Application of procedures in order to alter the diameter of tube ends
- B21D41/02—Enlarging
- B21D41/026—Enlarging by means of mandrels
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electric Vacuum Cleaner (AREA)
- Details Of Heat-Exchange And Heat-Transfer (AREA)
Abstract
The invention discloses a flaring sleeve of a pipe expanding machine. The flaring sleeve comprises a bell mouth forming member arranged at the front end and a spindle sleeve arranged at the rear end and used for connecting with the pipe expanding machine. The bell mouth forming member comprises a front end guide portion which can be inserted in a pipe fitting to be flared, a taper flaring portion having a small end connected with the front end guide portion, and a cylinder connected with a big end of the taper flaring portion through arc transmission. Arc transition connection is provided between the taper flaring portion and the front guide portion. The radius of the cylinder is larger than the diameter of the big end of the taper flaring portion, and a portion, stretching out of the big end of the taper flaring portion, forms a flat extension portion. The flaring sleeve can be used for manufacturing a qualified bell mouth, and a problem that a bell mouth may crack to a straight wall position of a pipe fitting can be prevented. The invention further discloses a pipe expanding machine provided with the flaring sleeve.
Description
Technical field
The present invention relates to air-conditioning preparing technical field, more particularly, relate to a kind of electric tube expander of heat exchanger used by manufacturing process and enlarging sleeve of electric tube expander of air-conditioning.
Background technology
Heat exchanger of air condition is carrying out in the process of producing, there is one enlarging operation, so-called enlarging operation is exactly process horn mouth in the end of air conditioner heat-exchanger brass pipe, and the horn mouth at mouth of pipe place mainly plays in follow-up welding sequence holds solder, avoids the effect that solder runs off when welding.
In enlarging operation, the equipment of main application is electric tube expander, electric tube expander is provided with enlarging sleeve and flare formation is carried out to the copper pipe mouth of pipe, current enlarging sleeve pipe is integral type structure, it is the column connector that diameter is larger in the middle part of it, and one end of connector is the horn mouth forming part for carrying out enlarging to copper pipe, the other end is the axle sleeve for being connected with electric tube expander, the taper expansion mouth that horn mouth forming part generally comprises front end guidance part and connects with described front end guidance part, the large end of described taper expansion mouth is near described column connector, and the large end margin of taper expansion mouth is consistent with the diameter of described column connector.
But there is following problem in this kind of enlarging sleeve pipe, large end margin position due to the taper expansion mouth on enlarging sleeve pipe carries out designing according to the copper pipe length of wanted enlarging, that is according to design, under ideal length, it is shaping that the end of copper pipe completes horn mouth when just arriving the large end margin of taper expansion mouth, thus do not have can produce ideal horn mouth during deviation between the physical length and predetermined length of copper pipe, but in actual production process, frequent meeting causes there is deviation between the length of copper pipe and ideal value due to the tolerance that produces in copper pipe blanking process or because of the shrinkage factor difference of copper pipe itself, this will make copper pipe occur long or short defect.
When copper pipe is shorter compared to ideal value, the large end margin installing to taper expansion mouth cannot be overlapped by there will be copper pipe End, thus making that horn mouth is less even cannot form horn mouth, this just easy loss causing solder in follow-up welding sequence, affects welding quality; When copper pipe is longer compared to ideal value, continuation is moved along enlarging sleeve by copper pipe, makes horn mouth ftracture to the straight wall portion position of copper pipe, and this kind of situation equally easily causes there is rosin joint in welding process, is welded with pore even the phenomenon generation of solder skip.
Therefore, how can ensure that pipe fitting produces qualified horn mouth in enlarging operation, horn mouth cracking can be avoided again to be the technical problem that current those skilled in the art need solution badly to the straight wall portion position of pipe fitting.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of enlarging sleeve of electric tube expander, can either ensure that pipe fitting produces qualified horn mouth in enlarging operation, horn mouth can be avoided again to ftracture to the straight wall portion position of pipe fitting.
Another object of the present invention is also to provide a kind of electric tube expander with above-mentioned enlarging sleeve.
For achieving the above object, the invention provides following technical scheme:
An enlarging sleeve for electric tube expander, comprises the horn mouth profiled member that is positioned at front end and be positioned at the axle sleeve of rear end for being connected with electric tube expander, and described horn mouth profiled member comprises:
The front end guidance part treating flared pipe fitting inside can be stretched into;
The taper expansion mouth that small end is connected with described front end guidance part, and described taper expansion mouth and described front end guidance part are that arc transition is connected;
The column be connected by arc transition with the large end of described taper expansion mouth, and the radius of described column is greater than the diameter of the large end of described taper expansion mouth, the position that described column stretches out the large end of described taper expansion mouth forms plane development portion.
Preferably, guidance part end, described front end is also provided with small end tapered guide surface forward.
Preferably, one end that described horn mouth profiled member is used for being connected with described axle sleeve is provided with the sleeve pipe that radius is less than described column, and described sleeve pipe is arranged with the elastic external member that axial length is less than described sleeve pipe, described axle sleeve is provided with the suit hole with described sleeve pipe adaptation, and the axial depth in described suit hole is greater than the difference of described sleeve pipe and described elastic external member axial length.
Preferably, the packing ring be arranged between described elastic external member and described axle sleeve is also comprised.
Preferably, the distance between the end of described sleeve pipe and the bottom in described suit hole is 2mm-3mm.
Preferably, described elastic external member is spring.
Preferably, described elastic external member is rubber external member.
The invention also discloses a kind of electric tube expander, this electric tube expander comprises enlarging sleeve, and described enlarging sleeve is as enlarging sleeve disclosed in above-mentioned any one.
As can be seen from above-mentioned technical scheme, in the enlarging sleeve of electric tube expander provided by the present invention, in horn mouth profiled member, front end is front end guidance part, with front end guidance part by arc transition be connected for taper expansion mouth, and the small end of taper expansion mouth is connected with front end guidance part, with the large end of taper expansion mouth by arc transition be connected for column, and the radius of column is greater than the diameter of the large end of taper expansion mouth, and the position that column stretches out the large end of taper expansion mouth forms plane development portion.
The large end of taper expansion mouth is connected by arc transition with plane development portion, if treat, the pipe fitting of enlarging is for being lower tolerance between one end of contacting with enlarging sleeve and ideal value, namely this end is lower than ideal height, so when pipe fitting end arrives plane development position, plane development portion expands further by the end of pipe fitting, thus ensure that pipe fitting end horn mouth is shaping, avoid the unflared situation through enlarging operation rear tubular member end to occur; If treat, the pipe fitting of enlarging is for being upper tolerance between one end of contacting with enlarging sleeve and ideal value, namely this end is higher than ideal height, so taper expansion mouth will ensure bell-mouthed original state, and the end longer to pipe fitting is expanded by plane development portion further, it is made to produce plane turnover structure, twice turning point is had to pipe fitting vertical wall section from plane turnover structure, thus the stress of pipe fitting end is not easy to postpone to pipe fitting vertical wall section, thus avoids horn mouth cracking and produce to the defect of pipe fitting vertical wall section.
Owing to being provided with this kind of enlarging sleeve in electric tube expander disclosed in the present invention, thus this electric tube expander also has the advantage of above-mentioned enlarging sleeve concurrently, no longer repeats herein to this.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The overall structure schematic diagram of the enlarging sleeve of electric tube expander of Fig. 1 for providing in the embodiment of the present invention;
The explosive view of the enlarging sleeve of electric tube expander of Fig. 2 for providing in the embodiment of the present invention.
Wherein,
1 is horn mouth profiled member, and 2 is elastic external member, and 3 is packing ring, and 4 is axle sleeve;
11 is tapered guide surface, and 12 is front end guidance part, and 13 is column, and 14 is sleeve pipe, and 15 is taper expansion mouth, and 16 is plane development portion.
Detailed description of the invention
One of core of the present invention is the enlarging sleeve providing a kind of electric tube expander, can either ensure that pipe fitting produces qualified horn mouth in enlarging operation, horn mouth can be avoided again to ftracture to the straight wall portion position of pipe fitting.
Another core of the present invention is to provide a kind of electric tube expander with above-mentioned enlarging sleeve.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Refer to Fig. 1 and Fig. 2, the overall structure schematic diagram of the enlarging sleeve of electric tube expander of Fig. 1 for providing in the embodiment of the present invention, the explosive view of the enlarging sleeve of electric tube expander of Fig. 2 for providing in the embodiment of the present invention.
The enlarging sleeve of the electric tube expander provided in the embodiment of the present invention comprises the horn mouth profiled member 1 being positioned at front end and the axle sleeve 4 for being connected with electric tube expander being positioned at rear end, one of core improvement of the present invention is the improvement to horn mouth profiled member 1, this horn mouth profiled member 1 comprises: front end guidance part 12, taper expansion mouth 15 and column 13, please refer to Fig. 2, the effect of front end guidance part 12 mainly will treat that the pipe fitting of enlarging is directed to taper expansion mouth 15, thus the diameter of front end guidance part 12 should be less than the internal diameter treating flared pipe fitting, install on front end guidance part 12 so that pipe fitting easily overlaps fast, the small end of taper expansion mouth 15 is connected with front end guidance part 12, and taper expansion mouth 15 and the connecting portion of front end guidance part 12 are that arc transition is connected, so that ensure that the end of pipe fitting smoothly transits on taper expansion mouth 15, pipe fitting end is avoided to occur to bend or stuck at taper expansion mouth 15 and the connecting portion of front end guidance part 12, column 13 is connected with the large end of taper expansion mouth 15, and connecting portion passes through arc transition, the radius of column 13 is greater than the diameter of the large end of taper expansion mouth 15, so that the position making column 13 stretch out the large end of taper expansion mouth 15 forms plane development portion 16, as shown in Figure 2.
What needs were described is, the front end guidance part 12 mentioned in above-described embodiment, taper expansion mouth 15 and column 13 are all coaxially arranged, and the front end in above-described embodiment specifically refers to the one end first carrying out with pipe fitting end contacting in flaring process, and rear end is one end relative with front end.
Taper expansion mouth 15 greatly end is connected by arc transition with plane development portion 16, if treat, the pipe fitting of enlarging is for being lower tolerance between one end of contacting with enlarging sleeve and ideal value, namely this end is lower than ideal height, so when pipe fitting end arrives plane development portion 16, plane development portion 16 expands further by the end of pipe fitting, thus ensure that pipe fitting end horn mouth is shaping, avoid the unflared situation through enlarging operation rear tubular member end to occur; If treat, the pipe fitting of enlarging is for being upper tolerance between one end of contacting with enlarging sleeve and ideal value, namely this end is higher than ideal height, so taper expansion mouth 15 will ensure bell-mouthed original state, and the end longer to pipe fitting is expanded by plane development portion 16 further, it is made to produce plane turnover structure, twice turning point is had to pipe fitting vertical wall section from plane turnover structure, thus the stress of pipe fitting end is not easy to postpone to pipe fitting vertical wall section, thus avoids horn mouth cracking and produce to the defect of pipe fitting vertical wall section.
As can be seen here, the enlarging sleeve of the electric tube expander provided in the embodiment of the present invention can either ensure to produce qualified horn mouth, can effectively avoid again horn mouth to ftracture to the straight wall portion position of pipe fitting.
In order to optimize the technical scheme in above-described embodiment further, be also provided with small end tapered guide surface 11 forward in the end of front end guidance part 12 in the present embodiment, arranging of tapered guide surface 11 will improve pipe fitting and be inserted in the accuracy of front end guidance part 12 further.
Well known to those skilled in the art, in heat exchanger of air condition heat exchanger tube enlarging operation, first needing by carrying out expand tube operation to pipe fitting, its objective is the aluminium flake of heat exchanger and copper pipe swelling, and then applying pressure completes bell-mouthed preparation further.The enlarging sleeve of the electric tube expander applied at present is the rigidity enlarging sleeve of integral type, and this sleeve cannot cushion pressure, and thus change excessive by the expand tube stage to instantaneous pressure during the transition of horn mouth preparatory phase, this easily causes breaking of pipe fitting.
The enlarging sleeve for this reason provided in the present embodiment is split type, as shown in Figure 2, concrete, horn mouth profiled member 1 and axle sleeve 4 are split type, and horn mouth profiled member 1 is provided with for the one end be connected with axle sleeve 4 sleeve pipe 14 that radius is less than column 13, so that form the structure being similar to the shaft shoulder between sleeve pipe 14 and column 13, and sleeve pipe 14 is arranged with the elastic external member 2 that axial length is less than sleeve pipe 14, axle sleeve 4 is provided with the suit hole with sleeve pipe 14 adaptation, and the axial depth in suit hole is greater than the difference of sleeve pipe 14 and elastic external member 2 axial length.
Because sleeve pipe 14 and the difference of elastic external member 2 axial length are after the end of elastic external member 2 props up column 13, sleeve pipe 14 exposes the length of elastic external member 2, sleeve pipe 14 part exposing elastic external member 2 can be overlapped in the suit hole that installs on axle sleeve 4, the degree of depth due to suit hole is greater than the length that sleeve pipe 14 exposes elastic external member 2, therefore the end of sleeve pipe 14 can't contact with the bottom in suit hole, but can gap be there is, this gap is just the buffer gap of horn mouth profiled member 1 relative to axle sleeve 4.
Concrete, by the expand tube stage to the transition of horn mouth preparatory phase time, moment, larger pressure change will make elastic external member 2 compress, and now horn mouth profiled member 1 will move to axle sleeve 4, this effectively can cushion pressure change larger instantaneously, thus effectively prevent the cracking of pipe fitting.
It is easily understood that, the end of sleeve pipe 14 is excessive with the distance bottom suit hole, easy generation horn mouth profiled member 1 is connected problem stable not with between axle sleeve 4, and sleeve pipe 14 end is too small with the spacing bottom suit hole, easily cause again the problem cannot carrying out effectively buffering to the pressure of instantaneous variation, in the present embodiment, the distance between bottom sleeve pipe 14 end and suit hole is set to 2mm-3mm, to ensure the pressure effectively cushioning instantaneous variation while horn mouth profiled member 1 is firmly connected with axle sleeve 4 for this reason.
Under normal circumstances, elastic external member 2 can select spring or rubber external member, and certainly, in order to ensure that service life is more permanent, those skilled in the art can also adopt other more durable materials to prepare elastic external member.
In order to protect elastic component, packing ring 3 can also be provided with between elastic external member 2 and axle sleeve 4, as shown in Figures 1 and 2.
In the electric tube expander provided in the present invention, enlarging sleeve is installed, and the enlarging sleeve in this electric tube expander is the enlarging sleeve of electric tube expander disclosed in above-mentioned any embodiment.
Owing to being provided with above-mentioned enlarging sleeve pipe in this electric tube expander, thus this electric tube expander has all advantages of above-mentioned enlarging sleeve pipe concurrently, no longer repeats in present specification to this.
In this description, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (8)
1. an enlarging sleeve for electric tube expander, comprise the horn mouth profiled member (1) that is positioned at front end and be positioned at rear end for the axle sleeve (4) be connected with electric tube expander, it is characterized in that, described horn mouth profiled member (1) comprising:
The front end guidance part (12) treating flared pipe fitting inside can be stretched into;
The taper expansion mouth (15) that small end is connected with described front end guidance part (12), and described taper expansion mouth (15) with described front end guidance part (12) for arc transition is connected;
The column (13) be connected by arc transition is held greatly with described taper expansion mouth (15), and the radius of described column (13) is greater than the diameter that described taper expansion mouth (15) is held greatly, described column (13) stretches out position formation plane development portion (16) that described taper expansion mouth (15) is held greatly.
2. the enlarging sleeve of electric tube expander as claimed in claim 1, it is characterized in that, guidance part (12) end, described front end is also provided with small end tapered guide surface forward (11).
3. the enlarging sleeve of electric tube expander as claimed in claim 1, it is characterized in that, described horn mouth profiled member (1) is provided with for the one end be connected with described axle sleeve (4) sleeve pipe (14) that radius is less than described column (13), and described sleeve pipe (14) is arranged with the elastic external member (2) that axial length is less than described sleeve pipe (14), described axle sleeve (4) is provided with the suit hole adaptive with described sleeve pipe (14), and the axial depth in described suit hole is greater than the difference of described sleeve pipe (14) and described elastic external member (2) axial length.
4. the enlarging sleeve of electric tube expander as claimed in claim 3, is characterized in that, also comprise the packing ring (3) be arranged between described elastic external member (2) and described axle sleeve (4).
5. the enlarging sleeve of electric tube expander as claimed in claim 4, it is characterized in that, the distance between the end of described sleeve pipe (14) and the bottom in described suit hole is 2mm-3mm.
6. the enlarging sleeve of electric tube expander as claimed in claim 3, it is characterized in that, described elastic external member (2) is spring.
7. the enlarging sleeve of electric tube expander as claimed in claim 3, it is characterized in that, described elastic external member (2) is rubber external member.
8. an electric tube expander, comprises enlarging sleeve, it is characterized in that, described enlarging sleeve is the enlarging sleeve of the electric tube expander as described in claim 1-7 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410050767.5A CN104841786B (en) | 2014-02-13 | 2014-02-13 | Pipe expanding machine and flaring sleeve thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410050767.5A CN104841786B (en) | 2014-02-13 | 2014-02-13 | Pipe expanding machine and flaring sleeve thereof |
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| Publication Number | Publication Date |
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| CN104841786A true CN104841786A (en) | 2015-08-19 |
| CN104841786B CN104841786B (en) | 2017-02-01 |
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| CN201410050767.5A Active CN104841786B (en) | 2014-02-13 | 2014-02-13 | Pipe expanding machine and flaring sleeve thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108097809A (en) * | 2017-12-19 | 2018-06-01 | 广东骏驰科技股份有限公司 | A kind of anti-drawing material mold for automobile pipe fitting shaping convex closure |
| CN108246883A (en) * | 2018-02-12 | 2018-07-06 | 珠海格力精密模具有限公司 | Punch fixed structure and with its punch-head assembly |
| CN109773062A (en) * | 2019-02-21 | 2019-05-21 | 上海图博可特石油管道涂层有限公司 | A kind of cold expanding dedicated anti-necking formed punch of line pipe |
| CN109909388A (en) * | 2018-12-18 | 2019-06-21 | 广东龙丰精密铜管有限公司 | A kind of reduced copper capillary tube or pipe fitting high-efficiency high-accuracy processing tool and processing technology |
| CN112275883A (en) * | 2020-10-15 | 2021-01-29 | 珠海格力智能装备有限公司 | Pipe fitting machining device and pipe expander |
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| JPS583735A (en) * | 1981-06-29 | 1983-01-10 | Nippon Kokan Kk <Nkk> | Pipe end expanding machine |
| EP0653256A1 (en) * | 1993-11-12 | 1995-05-17 | DE WAAL TECHNOLOGY & CONSULTANCY B.V. | Device for mechanically expanding a pipe or pipe section |
| CN201751042U (en) * | 2010-06-23 | 2011-02-23 | 浙江嘉兴亚达不锈钢制造有限公司 | Flaring mould of pipe fitting |
| CN102125959A (en) * | 2010-01-15 | 2011-07-20 | 雷诺士工业股份有限公司 | Reflare tool and process |
| JP2011194438A (en) * | 2010-03-19 | 2011-10-06 | On Industries Ltd | Pipe expanding apparatus of thin wall stainless steel pipe |
| CN202667470U (en) * | 2012-07-03 | 2013-01-16 | 潍坊恒安散热器集团有限公司 | Broaching mould |
| CN203155858U (en) * | 2013-01-27 | 2013-08-28 | 宁波奥克斯空调有限公司 | Expansion pipe expanding device for copper pipe in air conditioner heat exchanger |
| CN203711669U (en) * | 2014-02-13 | 2014-07-16 | 珠海格力电器股份有限公司 | Pipe expander and flaring sleeve thereof |
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| JPS583735A (en) * | 1981-06-29 | 1983-01-10 | Nippon Kokan Kk <Nkk> | Pipe end expanding machine |
| EP0653256A1 (en) * | 1993-11-12 | 1995-05-17 | DE WAAL TECHNOLOGY & CONSULTANCY B.V. | Device for mechanically expanding a pipe or pipe section |
| CN102125959A (en) * | 2010-01-15 | 2011-07-20 | 雷诺士工业股份有限公司 | Reflare tool and process |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108097809A (en) * | 2017-12-19 | 2018-06-01 | 广东骏驰科技股份有限公司 | A kind of anti-drawing material mold for automobile pipe fitting shaping convex closure |
| CN108097809B (en) * | 2017-12-19 | 2018-10-09 | 广东骏驰科技股份有限公司 | A kind of anti-drawing material mold for automobile pipe fitting molding convex closure |
| CN108246883A (en) * | 2018-02-12 | 2018-07-06 | 珠海格力精密模具有限公司 | Punch fixed structure and with its punch-head assembly |
| CN109909388A (en) * | 2018-12-18 | 2019-06-21 | 广东龙丰精密铜管有限公司 | A kind of reduced copper capillary tube or pipe fitting high-efficiency high-accuracy processing tool and processing technology |
| CN109773062A (en) * | 2019-02-21 | 2019-05-21 | 上海图博可特石油管道涂层有限公司 | A kind of cold expanding dedicated anti-necking formed punch of line pipe |
| CN112275883A (en) * | 2020-10-15 | 2021-01-29 | 珠海格力智能装备有限公司 | Pipe fitting machining device and pipe expander |
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| CN104841786B (en) | 2017-02-01 |
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