CN110508724B - Cold pressing method for tin in copper pipe - Google Patents
Cold pressing method for tin in copper pipe Download PDFInfo
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- CN110508724B CN110508724B CN201910614943.6A CN201910614943A CN110508724B CN 110508724 B CN110508724 B CN 110508724B CN 201910614943 A CN201910614943 A CN 201910614943A CN 110508724 B CN110508724 B CN 110508724B
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- tin
- containing groove
- wire
- movable push
- cold pressing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F1/00—Bending wire other than coiling; Straightening wire
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F15/00—Connecting wire to wire or other metallic material or objects; Connecting parts by means of wire
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Abstract
The invention discloses a cold pressing method of tin in a copper pipe, belonging to the field of copper pipe production and comprising the following steps of selecting a section of tin wire, and curling the tin wire into a ring shape; putting the curled tin wire into a tin containing groove of the pipe fitting; and cold pressing is adopted to extrude and deform the tin wire so as to fill the tin containing groove. The mode of at first directly intercepting tin silk makes the volume of tin silk more easily control, makes its and the volume phase-match that holds the molten tin bath, and the mode that adopts the cold pressing in the later stage can not lead to tin silk oxidation on the one hand, also can not be at the inside bubble that produces of tin silk, consequently filling quality is very high, and the yield of filling is higher. In addition, the waste of tin in the cold extrusion process is less, so that the consumption of tin is less on one hand compared with that of hot melting, and on the other hand, the consumption of tin is more controllable, and the automation is correspondingly facilitated.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to a cold pressing method for tin in a copper pipe, and belongs to the field of copper pipe production.
[ background of the invention ]
Tin filling operation is almost completely carried out in a tin containing groove of a copper pipe by adopting a hot melting method, so that the problems of several aspects are caused, firstly, tin is easy to oxidize in the hot melting process, secondly, the consumption of tin is uncontrollable, so that waste is caused, and secondly, bubbles are easy to generate in the filled tin, so that the filling quality is poor.
[ summary of the invention ]
The invention aims to overcome the defects of the prior art and provide a cold pressing method for tin in a copper tube, which has lower cost and better filling quality.
A cold pressing method of tin in a copper pipe comprises the following steps,
the method comprises the following steps: selecting a section of tin wire, and curling the tin wire into a ring shape;
step two: putting the curled tin wire into a tin containing groove of the pipe fitting;
step three: and cold pressing is adopted to extrude and deform the tin wire so as to fill the tin containing groove.
The invention has the following beneficial effects:
the mode of at first directly intercepting tin silk makes the volume of tin silk more easily control, makes its and the volume phase-match that holds the molten tin bath, and the mode that adopts the cold pressing in the later stage can not lead to tin silk oxidation on the one hand, also can not be at the inside bubble that produces of tin silk, consequently filling quality is very high, and the yield of filling is higher. In addition, the waste of tin in the cold extrusion process is less, so that the consumption of tin is less on one hand compared with that of hot melting, and on the other hand, the consumption of tin is more controllable, and the automation is correspondingly facilitated.
In the first step of the invention, the tin wire adopts servo feeding to select the tin wire with fixed length.
In the second step of the invention, the outer wall of the positioning core shaft is provided with an annular positioning groove, the tin wire is clamped in the positioning groove, the positioning core shaft drives the tin wire to enter the pipe fitting, and when the positioning groove moves to the tin containing groove, the tin wire is controlled to move from the positioning groove to the tin containing groove.
In the second step of the invention, the positioning mandrel is provided with a limiting bulge, and when the positioning groove moves to the tin containing groove, the limiting bulge is supported at the end part of the pipe fitting.
In the second step of the invention, when the positioning groove moves to the tin containing groove, the positioning groove is provided with a movable push plate which moves along the radial direction of the tin containing groove, the movable push plate is positioned at the inner side of the tin wire along the radial direction of the tin containing groove, and the movable push plate is pushed to enable the tin wire to move from the positioning groove to the tin containing groove.
In the second step of the invention, a plurality of movable push plates are arranged, all the movable push plates are distributed along the circumferential direction of the tin containing groove, a control rod is arranged in the middle of all the movable push plates, and the outer wall of the control rod is attached to all the movable push plates so as to control all the movable push plates to move outwards in the radial direction of the tin containing groove.
In the second step of the invention, the outer wall of the control rod is arranged obliquely relative to the axial direction of the tin containing groove.
In the third step of the invention, the tin wire is extruded by the roller, so that the shape of the tin wire is matched with that of the tin containing groove.
The ratio of the volume of the tin wire to the volume of the tin bath is 1.05-1.15.
Other features and advantages of the present invention will be disclosed in more detail in the following detailed description of the invention and the accompanying drawings.
[ description of the drawings ]
The invention is further described below with reference to the accompanying drawings:
FIG. 1 is a schematic sectional view of a straight pipe according to an embodiment of the present invention;
FIG. 2 is a schematic sectional structural view of a three-way pipe in an embodiment of the invention;
FIG. 3 is a schematic sectional view of an elbow according to an embodiment of the present invention;
FIG. 4 is a flow chart of a cold pressing method of tin in a copper tube according to an embodiment of the invention;
FIG. 5 is a flow chart of a tin melting method in a copper pipe according to a comparative example of the present invention;
fig. 6 is a schematic sectional view along the direction of a-a in fig. 5.
[ detailed description ] embodiments
The technical solutions of the embodiments of the present invention are explained and illustrated below with reference to the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present invention.
In the following description, the appearances of the indicating orientation or positional relationship such as the terms "inner", "outer", "upper", "lower", "left", "right", etc. are only for convenience in describing the embodiments and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention.
Example (b):
referring to fig. 1-4, this example illustrates a cold pressing method of tin in copper tubes, which is applicable to, but not limited to, straight tubes, tee tubes, and bent tubes. Specifically, the cold pressing method of tin in the copper tube comprises the following steps.
The method comprises the following steps: selecting a section of tin wire 2, and curling the tin wire 2 into a ring shape;
preferably, the tin wire 2 is fed by a servo system, so as to ensure that the length of the tin wire 2 is accurately adjustable, and the subsequent industrial production is facilitated, for example, in the embodiment, tin is filled into the same batch of pipe fittings 4 with the same specification, so that the tin wire 2 is cut off after selecting the tin wire 2 with the fixed length, and the volume of each section of the tin wire 2 is matched with the volume of the tin containing tank 1 to be filled.
Step two: putting the curled tin wire 2 into a tin containing groove 1 of a pipe fitting 4;
one of them method that tin silk 2 placed the entering and hold molten tin bath 1 is for using positioning core shaft 3, wherein set up annular constant head tank on positioning core shaft 3's the outer wall, step (in), 2 curling in-process of tin silk moves to in the constant head tank, utilize the lateral wall of constant head tank to fix a position 2 tin silk, thereby make 2 cards of tin silk in the constant head tank, then positioning core shaft 3 drives 2 tin silks and moves to 4 inside of pipe fitting along 4 axial of pipe fitting, move to holding 1 departments of molten tin bath until constant head tank and the tin silk 2 that is located the constant head tank, control 2 tin silks move to holding 1 tin bath from the constant head tank.
In this embodiment, the distance between the end of the pipe 4 and the tin containing groove 1 is constant in the axial direction of the pipe 4, considering that the pipe 4 of the same specification is filled. Therefore, the positioning mandrel 3 is provided with the limiting bulges 5, when the positioning groove moves to the position of the tin containing groove 1, the limiting bulges 5 are supported at the end parts of the pipe fittings 4, and the relative positions of the tin containing groove 1 and the positioning groove are fixed through the limiting bulges 5, so that the tin wire 2 is conveniently transferred into the tin containing groove 1 from the positioning groove.
Hold molten tin bath 1 and be the annular groove of standard, the constant head tank is slightly less than the annular groove who holds molten tin bath 1 for the diameter, and when the constant head tank removed to holding molten tin bath 1 department, hold molten tin bath 1 and the concentric setting of constant head tank. The movable push plate 6 is movably arranged on the positioning core shaft 3, and when the tin bath 1 and the positioning groove are concentrically arranged, the movable push plate 6 moves on the positioning core shaft 3 in the radial direction of the tin bath 1. A movable groove for moving the movable push plate 6 is formed in the corresponding positioning mandrel 3, and the moving direction of the movable push plate 6 is limited by the side wall of the movable groove. In addition, the movable groove is communicated to the positioning groove, so that the tin wire 2 is in contact with the tin wire 2 through the movable push plate 6 when moving in the positioning groove, the tin wire 2 is pushed to the tin containing groove 1 from the positioning groove in the radial direction of the tin containing groove 1 by the movable push plate 6, the moving direction of the movable push plate 6 is utilized to limit the moving direction of the tin wire 2, and the tin containing groove 1 is aligned in the transfer process of the tin wire 2. Correspondingly, the tin wire 2 is positioned between the tin containing groove 1 and the movable push plate 6 in the radial direction of the tin containing groove 1, and the movable push plate 6 pushes the tin wire 2 at one side of the tin wire 2 far away from the tin containing groove 1.
The single movable push plate 6 can only push a small section of the tin wire 2, on one hand, the transfer efficiency is low, on the other hand, different parts of the tin wire 2 need to be pushed successively, so that mutual interference between pushing processes at each time is caused, and the transfer quality of the tin wire 2 can be possibly influenced.
For this reason movable push pedal 6 quantity is provided with a plurality ofly in this embodiment, and all movable push pedals 6 are along holding 1 circumference distribution of molten tin bath, and the centre of all movable push pedals 6 is provided with control lever 7, and the outer wall of control lever 7 is laminated with all movable push pedals 6 to control all movable push pedals 6 and radially outwards move holding molten tin bath 1.
Because the outer wall of the control rod 7 is attached to all the movable push plates 6, the control rod 7 can drive all the movable push plates 6 to move outwards along the radial direction of the tin containing groove 1 simultaneously so as to push the tin wire 2 to move towards the tin containing groove 1 as many as possible.
Like the relative pipe fitting 4 axis slope of the outer wall of control lever 7 in this embodiment, the corresponding movable push pedal 6 also inclines relative pipe fitting 4 axis with the lateral wall of the laminating of control lever 7, therefore control lever 7 can drive movable push pedal 6 along holding tin bath 1 radial displacement when moving to pipe fitting 4 along pipe fitting 4 axial.
Step three: taking out positioning core shaft 3 and control lever 7 from pipe fitting 4, tin silk 2 is stayed and is held tin bath 1, adopts cold pressing to extrude tin silk 2 deformation this moment for the shape of tin silk 2 is unanimous as far as possible with the shape of holding tin bath 1, thereby fills and holds tin bath 1.
For example, in the present embodiment, the tin wire 2 is extruded by the roller 8, and the roller 8 extrudes the portion of the tin wire 2 located outside the tin containing tank 1 into the tin containing tank 1, so that the shape of the tin wire 2 is matched with the tin containing tank 1. The roller 8 rolls along the circumferential direction of the tin containing groove 1, the roller 8 is controlled by the roller mandrel 9, and the roller mandrel 9 drives the roller 8 to move.
In view of the fact that the tin wire 2 is low in loss in the cold pressing process, even almost no loss exists, the tin wire 2 intercepted in the step I only needs to be guaranteed to be slightly larger than the volume of the tin containing tank 1.
Preferably, the ratio of the volume of the tin wire 2 to the volume of the tin containing groove 1 is 1.05-1.15.
The filled tin wire 2 has high surface quality, no bad defects of air holes, shrinkage holes, wall hanging and the like, high qualification rate in subsequent engineering construction, and saves more than 25 percent of the using amount of the tin wire 2 and more than 20 percent of energy consumption compared with a hot melting process. Meanwhile, the requirements on the size and the ovality of the pipe orifice of the pipe fitting 4 in the whole production process are lower, and the precision is only required to be controlled to be about 0.2 mm.
Comparative example:
referring to fig. 5-6, this comparative example uses a hot-melt method to fill the copper tube-in-tin bath 1 with tin.
The method comprises the following specific steps:
the method comprises the following steps: selecting a tin ingot 10 or a tin bar;
step two: melting the tin ingot 10 or the tin bar by an electric melting furnace 11 to form a molten tin bath 12; wherein the bottom of the molten tin 12 is a piston rod 13, the top of the electric melting furnace 11 is a tin pipeline 14, and the molten tin 12 is pushed by the piston rod 13 to move towards the tin pipeline 14;
step three: selecting a filling mold 15, covering the filling mold 15 to the end part of the pipe fitting 4, wherein the top of the filling mold 15 is also provided with a tin liquid pipeline 14, a piston rod 13 enables molten tin liquid 12 to flow to the tin liquid pipeline 14 of the filling mold 15 through the tin liquid pipeline 14 of the electric melting furnace 11, the bottom of the filling mold 15 is positioned in the pipe fitting 4, the side wall of the pipe fitting 4 is provided with a plurality of filling pipelines 16, all the filling pipelines 16 are distributed along the circumferential direction of the tin containing groove 1, two ends of each filling pipeline 16 are respectively communicated to the tin liquid pipeline 14 of the tin containing groove 1 and the filling mold 15, the tin liquid pipeline 14 of the filling mold 15 conveys the molten tin liquid 12 to the tin containing groove 1 through the filling pipelines 16, and the molten tin liquid 12 is filled in the tin containing groove 1;
step IV: the filling mold 15 is removed and the molten tin 12 is allowed to cool gradually.
The method of the comparative embodiment has high requirements on the size and the ovality of the pipe orifice of the pipe fitting 4, the precision needs to be controlled below 0.1mm, and the molten tin 12 is poor in surface quality after being cooled and formed, and has the defects of air holes, shrinkage cavities, wall hanging and the like, so that the rejection rate is high during subsequent engineering construction, the rework phenomenon is serious, the tin consumption is large, the oxidation is serious, and the energy consumption is high.
The comparative tin amount data of the examples and comparative examples are shown in Table 1.
TABLE 1
While the invention has been described with reference to specific embodiments thereof, it will be understood by those skilled in the art that the invention is not limited thereto, and may be embodied in many different forms without departing from the spirit and scope of the invention as set forth in the following claims. Any modification which does not depart from the functional and structural principles of the present invention is intended to be included within the scope of the claims.
Claims (4)
1. A cold pressing method for tin in a copper pipe is characterized by comprising the following steps: comprises the following steps of (a) carrying out,
the method comprises the following steps: selecting a section of tin wire, and curling the tin wire into a ring shape;
step two: putting the curled tin wire into a tin containing groove of the pipe fitting;
step three: cold pressing is adopted to extrude and deform the tin wire so as to fill the tin containing groove;
and secondly, an annular positioning groove is formed in the outer wall of the positioning mandrel, a movable push plate which moves along the radial direction of the tin containing groove is arranged at the positioning groove, the tin wire is clamped in the positioning groove, the positioning mandrel drives the tin wire to enter the pipe fitting, and when the positioning groove moves to the position of the tin containing groove, the movable push plate is radially positioned on the inner side of the tin wire in the radial direction of the tin containing groove, and the movable push plate is pushed to enable the tin wire to move from the positioning groove to the tin containing groove.
2. The method of cold pressing of tin within copper tubing as recited in claim 1, wherein: and secondly, arranging a limiting bulge on the positioning mandrel, wherein when the positioning groove moves to the position of the tin containing groove, the limiting bulge is supported at the end part of the pipe fitting.
3. The method of cold pressing of tin within copper tubing as recited in claim 1, wherein: and in the second step, a plurality of movable push plates are arranged, all the movable push plates are distributed along the circumferential direction of the tin containing groove, a control rod is arranged in the middle of all the movable push plates, and the outer wall of the control rod is attached to all the movable push plates so as to control all the movable push plates to move outwards in the radial direction of the tin containing groove.
4. A method of cold pressing of tin within copper tubing as claimed in claim 3 wherein: in the second step, the outer wall of the control rod is obliquely arranged relative to the axial direction of the tin containing groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910614943.6A CN110508724B (en) | 2019-07-09 | 2019-07-09 | Cold pressing method for tin in copper pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910614943.6A CN110508724B (en) | 2019-07-09 | 2019-07-09 | Cold pressing method for tin in copper pipe |
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| Publication Number | Publication Date |
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| CN110508724A CN110508724A (en) | 2019-11-29 |
| CN110508724B true CN110508724B (en) | 2020-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910614943.6A Active CN110508724B (en) | 2019-07-09 | 2019-07-09 | Cold pressing method for tin in copper pipe |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2106215C1 (en) * | 1997-03-05 | 1998-03-10 | Акционерное общество открытого типа "Каменск-Уральский завод по обработке цветных металлов" | Method for production of copper long blank |
| CN2586043Y (en) * | 2001-09-24 | 2003-11-12 | 珠海凯达新材料研究所有限公司 | Tube with convex ring on its end |
| CN2607221Y (en) * | 2003-03-19 | 2004-03-24 | 新疆特变电工股份有限公司 | Cold pressing copper tube and cold pressing mould for welding transformer lead wire |
| CN2653266Y (en) * | 2003-07-08 | 2004-11-03 | 王宗宏 | Wire insert type pipeline connector |
| CN106541206A (en) * | 2016-11-18 | 2017-03-29 | 绥阳县耐环铝业有限公司 | Evaporator of electric refrigerator Cu-AL pipe is colded pressing Welding |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202811294U (en) * | 2012-05-29 | 2013-03-20 | 上海日立电器有限公司 | Connecting pipe for connecting joint of refrigeration compressor |
| CN202814189U (en) * | 2012-09-27 | 2013-03-20 | 合肥天鹅制冷科技有限公司 | Heat exchanger |
| CN207743404U (en) * | 2017-12-19 | 2018-08-17 | 上海晗普新材料科技有限公司 | A kind of pyrocondensation centre crimp type terminal with tin ring |
-
2019
- 2019-07-09 CN CN201910614943.6A patent/CN110508724B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2106215C1 (en) * | 1997-03-05 | 1998-03-10 | Акционерное общество открытого типа "Каменск-Уральский завод по обработке цветных металлов" | Method for production of copper long blank |
| CN2586043Y (en) * | 2001-09-24 | 2003-11-12 | 珠海凯达新材料研究所有限公司 | Tube with convex ring on its end |
| CN2607221Y (en) * | 2003-03-19 | 2004-03-24 | 新疆特变电工股份有限公司 | Cold pressing copper tube and cold pressing mould for welding transformer lead wire |
| CN2653266Y (en) * | 2003-07-08 | 2004-11-03 | 王宗宏 | Wire insert type pipeline connector |
| CN106541206A (en) * | 2016-11-18 | 2017-03-29 | 绥阳县耐环铝业有限公司 | Evaporator of electric refrigerator Cu-AL pipe is colded pressing Welding |
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| CN110508724A (en) | 2019-11-29 |
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