CN113231486B - Manufacturing process of high-precision welding-free special copper coil - Google Patents
Manufacturing process of high-precision welding-free special copper coil Download PDFInfo
- Publication number
- CN113231486B CN113231486B CN202110188764.8A CN202110188764A CN113231486B CN 113231486 B CN113231486 B CN 113231486B CN 202110188764 A CN202110188764 A CN 202110188764A CN 113231486 B CN113231486 B CN 113231486B
- Authority
- CN
- China
- Prior art keywords
- pipe body
- pipe
- fixing part
- fixing
- annealing
- Prior art date
- 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.)
- Active
Links
Images
Classifications
-
- 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
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
-
- 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
- B21C9/00—Cooling, heating or lubricating drawing material
- B21C9/02—Selection of compositions therefor
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
Abstract
The invention provides a high-precision welding-free special copper coil pipe manufacturing process, which comprises the following steps: step 1, selecting high-purity cathode copper as a raw material to produce a blank tube, and manufacturing high-volatility drawing oil for later use; step 2, stretching the blank pipe produced by using raw materials by using high-volatility drawing oil, controlling the elongation coefficient of each stretching to be between 1.3 and 1.5, and stretching for 7 to 9 passes to obtain a semi-finished product; step 3, annealing the semi-finished product after stretching, wherein a low-temperature annealing mode is selected for annealing; and 4, adopting inert gas to sweep in the annealing process, wherein the outer port of the semi-finished product is connected with a vent pipe, and the inert gas sweeps the inner wall of the semi-finished product through the vent pipe to obtain the final finished product.
Description
Technical Field
The invention belongs to the technical field of welding-free special copper coil pipes, and particularly relates to a manufacturing process of a high-precision welding-free special copper coil pipe.
Background
At present, a welding-free technology is used for manufacturing a copper coil pipe in the market at present, in order to improve the sealing performance of the manufactured copper coil pipe, however, in the existing copper coil pipe manufacturing process, a common R410A copper coil pipe is often used as a raw material for manufacturing, the technical requirements of welding-free connection on smoothness, flexibility, roundness and wall thickness uniformity cannot be met, and leakage is easily caused due to the fact that the bonding degree is not strong after connection.
Disclosure of Invention
The invention provides a high-precision welding-free special copper coil pipe manufacturing process, which can be used for welding-free connection of copper coil pipes through improvement of raw materials and technology and simultaneously ensures the fitting degree of the copper coil pipes.
The technical scheme of the invention is realized as follows: a high-precision welding-free special copper coil pipe manufacturing process comprises the following steps:
step 1, selecting high-purity cathode copper as a raw material to produce a blank tube, and manufacturing high-volatility drawing oil for later use;
step 2, stretching the blank pipe produced by using raw materials by using high-volatility drawing oil, controlling the elongation coefficient of each stretching to be between 1.3 and 1.5, and stretching for 7 to 9 passes to obtain a semi-finished product;
step 3, annealing the semi-finished product after stretching, wherein a low-temperature annealing mode is selected for annealing;
and 4, sweeping by adopting inert protective gas in the annealing process, wherein the sweeping mode is that a vent pipe is connected to the outer port of the semi-finished product, the other end of the vent pipe is connected with inert protective gas storage equipment, an electromagnetic valve is arranged on the vent pipe, and the inert protective gas is swept to the inner wall of the semi-finished product by opening the electromagnetic valve to obtain the final finished product.
As a preferable embodiment, the preparation method of the high volatile drawing oil in the step 1 comprises the steps of selecting 70-80 parts of base oil, 2-5 parts of tackifier, 15-25 parts of oiliness agent and 3-5 parts of extreme pressure agent.
In a preferred embodiment, the tackifier is an ethylene-propylene copolymer, the oiliness agent is a mixture of methyl ester, butyl ester and fatty alcohol, and the extreme pressure agent is organic phosphate.
As a preferred embodiment, the die used in the drawing process in step 2 is a yg6x cemented carbide die, and the deviation of the die is less than 0.005 mm.
In a preferred embodiment, the annealing temperature in step 3 is set to 450 ℃ as the batch temperature, the furnace temperature of the furnace used for annealing is set to +50 ℃ as the batch temperature, and the holding time after annealing is 2 hours.
In a preferred embodiment, the purity of the inert gas in the step 4 is 99.99%, the pressure when the inert gas is purged is not less than 0.5Mpa, and the purging time is from the beginning of annealing to the cooling and discharging of the finished product.
As a preferred embodiment, the vent pipe includes a first pipe body, a second pipe body and a fixing member, wherein one end of the first pipe body is disposed at the outer port of the semi-finished product, the other end of the first pipe body is sleeved outside the second pipe body, one end of the second pipe body is connected to the inert gas storage device, the other end of the second pipe body is inserted into the first pipe body, and the fixing member is disposed at the joint of the first pipe body and the second pipe body for fixing the first pipe body and the second pipe body.
As a preferred embodiment, the side wall of the first tube body is provided with a first opening, the side wall of the second tube body is provided with a second opening, an adjusting plate is connected and arranged between two ends of the inner wall of the second tube body, one end of the adjusting plate and the tube wall are fixedly connected and arranged, the other end of the adjusting plate is fixedly connected and arranged with an adjusting block, one end of the adjusting block is hinged with the second opening, the other end of the adjusting block extends out of the second opening, the fixing member comprises a first body connecting part, a second body connecting part and a fixing ring, one end of the first body connecting part is sleeved outside the first tube body, the other end of the first body connecting part is clamped and arranged with the first opening, one end of the second body connecting part is sleeved outside the second tube body, the other end of the second body connecting part is arranged in a threaded manner, one end of the fixing ring is sleeved outside the first body connecting part, the other end of the fixing ring is in threaded connection with the second body connecting part.
As a preferred embodiment, the first body connecting portion includes a first fixing portion, a second fixing portion, a third fixing portion, and a fourth fixing portion;
wherein, the two ends of the first fixed part are integrally connected with fixed blocks;
the third fixing part is arranged on one side of the first fixing part, one end of the second fixing part is connected with the first fixing part, the other end of the second fixing part is connected with the third fixing part, and a third opening is formed in the side wall of the second fixing part;
the fourth fixed part is arranged at the third opening, one end of the fourth fixed part is connected with the fixed block through a spring, and the other end of the fourth fixed part is abutted to the first pipe body.
As a preferred embodiment, the fourth fixing portion includes a first limiting portion, a second limiting portion and a third limiting portion that are integrally connected;
wherein, a limit groove is arranged in the first limit part, and the spring is arranged in the limit groove;
the second limiting part is arranged on one side of the first limiting part, the inner side of the second limiting part is integrally connected with a limiting block, one end of the spring is abutted against the fixing block, and the other end of the spring is fixedly connected with the limiting block;
the third limiting part is arranged on the outer side of the second limiting part, and the third limiting part is abutted with the fixing ring.
After the technical scheme is adopted, the invention has the beneficial effects that:
the invention realizes the copper content in the raw materials through the change of the raw materials, increases the number of stretching channels by adopting high-volatility drawing oil, thereby ensuring the cleanliness of the copper pipe, the roundness and the wall thickness uniformity of the copper pipe in the production process, and simultaneously ensures the grain size, the flexibility and the cleanliness of the inner wall of the copper pipe by adopting a special annealing process and a mode of blowing high-purity inert gas to the inner wall of the copper pipe, so that the residue on the inner surface of the cylinder wall is less than or equal to 0.015 g/square meter.
The invention improves the vent pipe, improves the connectivity between the first pipe body and the second pipe body through the fixing part, removes the connection between the first fixing part and the second fixing part through screwing the fixing ring, pushes the adjusting block to the inner side of the second pipe body, and deforms the adjusting plate under the action of stress, so that the second pipe body moves in the first pipe body, and changes the length of the vent pipe.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic process flow diagram of the present invention;
FIG. 2 is a schematic structural view of the fixing member;
FIG. 3 is an exploded view of the vent tube;
FIG. 4 is a schematic cross-sectional view of the fixing member;
FIG. 5 is a schematic cross-sectional view of a vent tube;
fig. 6 is a schematic structural view of the vent pipe.
In the figures, 11-first tube; 11 a-a first opening; 12-a second tubular body; 12 a-a second opening; 13-a regulating block; 14-adjusting plate; s-a spring; 20-a first piece connecting portion; 22-fixing blocks; 23-a first fixed part; 21-a third opening; 30-a fourth fixation section; 31-a third limiting part; 32-a limiting block; 33-a limiting groove; 44-a fourth opening; 50-fixing the ring.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
According to the figures 1 to 6, the manufacturing process of the high-precision welding-free special copper coil comprises the following steps:
step 1, selecting high-purity cathode copper as a raw material to produce a blank tube, and manufacturing high-volatility drawing oil for later use;
step 2, stretching the blank pipe produced by using the raw materials by using high-volatility drawing oil, wherein the elongation coefficient of each stretching is 1.4, and the used stretching pass is 8, so as to obtain a semi-finished product;
step 3, annealing the semi-finished product after stretching, wherein a low-temperature annealing mode is selected for annealing;
and 4, purging with inert gas in the annealing process, wherein the inert gas is nitrogen, and the nitrogen purging mode is that a vent pipe is connected to the outer port of the semi-finished product, the other end of the vent pipe is connected with an inert gas storage device, an electromagnetic valve is arranged on the vent pipe, and the nitrogen purging is performed on the inner wall of the semi-finished product by opening the electromagnetic valve to obtain the final finished product.
The preparation method of the high volatile drawing oil in the step 1 comprises the following steps of selecting 70 parts of base oil, 4 parts of tackifier, 23 parts of oiliness agent and 3 parts of extreme pressure agent.
The tackifier is ethylene-propylene copolymer, the oiliness agent is a mixture of methyl ester, butyl ester and fatty alcohol, and the extreme pressure agent is organic phosphate.
The die used in the drawing process in step 2 is a yg6x hard alloy die, and the deviation of the die is less than 0.005 mm.
The annealing temperature in the step 3 is set as the material temperature of 450 ℃, the furnace temperature of a furnace used for annealing is the material temperature plus 50 ℃, and the heat preservation is carried out after annealing, wherein the time for heat preservation is 2 hours.
In the step 4, the purity of the nitrogen is 99.99 percent, the pressure during nitrogen purging is more than or equal to 0.5Mpa, and the purging time is from the beginning of annealing to the cooling and discharging of the finished product.
The breather pipe comprises a first pipe body 11, a second pipe body 12 and a fixing part, wherein one end of the first pipe body 11 is arranged at an outer port of the semi-finished product, the other end of the first pipe body 11 is sleeved on the outer side of the second pipe body 12, one end of the second pipe body 12 is connected with a nitrogen storage device, the other end of the second pipe body 12 is inserted into the first pipe body 11, and the fixing part is arranged at the joint of the first pipe body 11 and the second pipe body 12 and used for fixing the first pipe body 11 and the second pipe body 12.
The side wall of the first pipe body 11 is provided with a first opening 11a, the side wall of the second pipe body 12 is provided with a second opening 12a, an adjusting plate 14 is connected and arranged between two ends of the inner wall of the second pipe body 12, one end of the adjusting plate 14 is fixedly connected and arranged with the pipe wall, the other end of the adjusting plate 14 is fixedly connected and arranged with an adjusting block 13, one end of the adjusting block 13 is hinged with the second opening 12a, the other end of the adjusting block 13 extends out of the second opening 12a, the fixing member comprises a first member connecting part 20, a second member connecting part and a fixing ring 50, one end of the first member connecting part 20 is sleeved on the outer side of the first pipe body 11, the other end of the first member connecting part 20 is clamped and arranged with the first opening 11a, one end of the second member connecting part is sleeved on the outer side of the second pipe body 12, the other end of the second member connecting part is in a threaded arrangement, one end of the fixing ring 50 is sleeved on the outer side of the first member connecting part 20, the other end of the fixing ring 50 is threadedly coupled to the second body coupling portion.
The first body connecting portion 20 includes a first fixing portion 23, a second fixing portion, a third fixing portion, and a fourth fixing portion 30;
wherein, the two ends of the first fixed part 23 are integrally connected with and provided with fixed blocks 22;
the third fixing part is arranged at one side of the first fixing part 23, one end of the second fixing part is connected with the first fixing part 23, the other end of the second fixing part is connected with the third fixing part, and the side wall of the second fixing part is provided with a third opening 21;
the fourth fixing portion 30 is disposed at the third opening 21, one end of the fourth fixing portion 30 is connected to the fixing block 22 by a spring S, and the other end of the fourth fixing portion 30 abuts against the first pipe 11.
The fourth fixing portion 30 includes a first limiting portion, a second limiting portion and a third limiting portion 31 integrally connected to each other;
wherein, a limit groove 33 is arranged in the first limit part, and the spring S is arranged in the limit groove 33;
the second limiting part is arranged on one side of the first limiting part, the inner side of the second limiting part is integrally connected with a limiting block 32, one end of the spring S is abutted against the fixed block 22, and the other end of the spring S is fixedly connected with the limiting block 32;
the third position-limiting portion 31 is disposed outside the second position-limiting portion, and the third position-limiting portion 31 is abutted against the fixing ring 50.
The invention ensures the copper content by selecting the raw materials, ensures the cleanliness of the copper pipe, the roundness and the wall thickness uniformity of the copper pipe in the production process by adopting high-volatility drawing oil and increasing the number of drawing tracks, and ensures the grain size, the flexibility and the cleanliness of the inner wall of the copper pipe by adopting a special annealing process to heighten a mode of blowing pure nitrogen to the inner wall of the copper pipe, so that the residue on the inner surface of the cylinder wall is less than or equal to 0.015 g/square meter.
Moreover, the invention improves the vent pipe, improves the connectivity between the first pipe body 11 and the second pipe body 12 through the fixing part, simultaneously releases the connection between the first fixing part 23 and the second fixing part by screwing the fixing ring 50, pushes the adjusting block 13 to the inner side of the second pipe body 12, and deforms the adjusting plate 14 under the action of stress, so that the second pipe body 12 moves in the first pipe body 11, and changes the length of the vent pipe.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A high-precision welding-free special copper coil pipe manufacturing process is characterized by comprising the following steps:
step 1, selecting high-purity cathode copper as a raw material to produce a blank tube, and manufacturing high-volatility drawing oil for later use;
step 2, stretching the blank pipe produced by using raw materials by using high-volatility drawing oil, controlling the elongation coefficient of each stretching to be between 1.3 and 1.5, and stretching for 7 to 9 passes to obtain a semi-finished product;
step 3, annealing the semi-finished product after stretching, wherein a low-temperature annealing mode is selected for annealing;
step 4, sweeping by adopting inert protective gas in the annealing process, wherein the sweeping mode is that a vent pipe is connected to the outer port of the semi-finished product, the other end of the vent pipe is connected with inert protective gas storage equipment, an electromagnetic valve is arranged on the vent pipe, and the inert protective gas is swept to the inner wall of the semi-finished product by opening the electromagnetic valve to obtain a final finished product;
the vent pipe comprises a first pipe body, a second pipe body and a fixing part, wherein one end of the first pipe body is arranged at the outer port of the semi-finished product, the other end of the first pipe body is sleeved outside the second pipe body, one end of the second pipe body is connected with an inert protective gas storage device, the other end of the second pipe body is inserted into the first pipe body, and the fixing part is arranged at the joint of the first pipe body and the second pipe body and used for fixing the first pipe body and the second pipe body;
the side wall of the first pipe body is provided with a first opening, the side wall of the second pipe body is provided with a second opening, an adjusting plate is connected and arranged between two ends of the inner wall of the second pipe body, one end of the adjusting plate is fixedly connected and arranged with the pipe wall, the other end of the adjusting plate is fixedly connected and arranged with an adjusting block, one end of the adjusting block is hinged with the second opening, the other end of the adjusting block extends out of the second opening, the fixing part comprises a first body connecting part, the outer side of the first pipe body is arranged at one end of the first pipe body in a sleeved mode, the other end of the first pipe body is arranged between the first opening in a clamped mode, the outer side of the second pipe body is arranged at one end of the second pipe body in a sleeved mode, the other end of the second pipe body connecting portion is arranged in a threaded mode, one end of the fixing ring is arranged on the outer side of the first pipe body in a sleeved mode, and the other end of the fixing ring is connected with the second pipe body connecting portion in a threaded mode.
2. The manufacturing process of the high-precision welding-free special copper coil pipe according to claim 1, wherein the preparation method of the high-volatility drawing oil in the step 1 comprises the steps of selecting 70-80 parts of base oil, 2-5 parts of a tackifier, 15-25 parts of an oiliness agent and 3-5 parts of an extreme pressure agent.
3. The manufacturing process of the high-precision welding-free special copper coil pipe according to claim 2, wherein the tackifier is an ethylene-propylene copolymer, the oiliness agent is a mixture of methyl ester, butyl ester and fatty alcohol, and the extreme pressure agent is organic phosphate.
4. The manufacturing process of the high-precision welding-free special copper coil pipe according to claim 1, wherein a die used in the drawing process in the step 2 is a yg6x hard alloy die, and the deviation of the die is less than 0.005 mm.
5. The manufacturing process of the high-precision welding-free special copper coil pipe as claimed in claim 1, wherein the annealing temperature in the step 3 is set to be 450 ℃, the furnace temperature of a furnace used for annealing is 500 ℃, and the annealing holding time is 2 hours.
6. The manufacturing process of the high-precision welding-free special copper coil pipe according to claim 1, characterized in that the purity of the inert protective gas in the step 4 is 99.99%, the pressure during purging is not less than 0.5Mpa, and the purging time is from the beginning of annealing to the cooling and discharging of the finished product.
7. The manufacturing process of the high-precision welding-free special copper coil pipe as claimed in claim 1, wherein the first body connecting part comprises a first fixing part, a second fixing part, a third fixing part and a fourth fixing part;
wherein, the two ends of the first fixed part are integrally connected with fixed blocks;
the third fixing part is arranged on one side of the first fixing part, one end of the second fixing part is connected with the first fixing part, the other end of the second fixing part is connected with the third fixing part, and a third opening is formed in the side wall of the second fixing part;
the fourth fixing part is arranged at the third opening, one end of the fourth fixing part is connected with the fixing block through a spring, and the other end of the fourth fixing part is abutted against the first pipe body.
8. The manufacturing process of the high-precision welding-free special copper coil pipe as claimed in claim 7, wherein the fourth fixing portion comprises a first limiting portion, a second limiting portion and a third limiting portion which are integrally connected;
wherein, a limit groove is arranged in the first limit part, and the spring is arranged in the limit groove;
the second limiting part is arranged on one side of the first limiting part, the inner side of the second limiting part is integrally connected with a limiting block, one end of the spring is abutted against the fixing block, and the other end of the spring is fixedly connected with the limiting block;
the third limiting part is arranged on the outer side of the second limiting part, and the third limiting part is abutted with the fixing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110188764.8A CN113231486B (en) | 2021-02-19 | 2021-02-19 | Manufacturing process of high-precision welding-free special copper coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110188764.8A CN113231486B (en) | 2021-02-19 | 2021-02-19 | Manufacturing process of high-precision welding-free special copper coil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113231486A CN113231486A (en) | 2021-08-10 |
| CN113231486B true CN113231486B (en) | 2022-07-15 |
Family
ID=77130140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110188764.8A Active CN113231486B (en) | 2021-02-19 | 2021-02-19 | Manufacturing process of high-precision welding-free special copper coil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113231486B (en) |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4318101A1 (en) * | 1993-06-01 | 1994-12-08 | Sterimed Gmbh | Hose coupling |
| CA2150491C (en) * | 1994-06-23 | 2001-10-02 | Robert E. Klemm | Pipe having replaceable wear resistant lined coupler |
| CN1667137A (en) * | 2005-04-05 | 2005-09-14 | 佛山市顺德区精艺万希铜业有限公司 | Well type bright annealing furnace and inside purging process thereof |
| CN101250679A (en) * | 2008-04-15 | 2008-08-27 | 任建国 | On-line annealing method and apparatus for rolling copper pipe |
| CN201306555Y (en) * | 2008-10-31 | 2009-09-09 | 陈寅 | Multifunctional pipe connecting structure |
| CN104946368A (en) * | 2015-07-27 | 2015-09-30 | 苏州固特斯电子科技有限公司 | Lubricating oil for copper pipe drawing technology |
| CN208748165U (en) * | 2018-07-09 | 2019-04-16 | 上海海亮铜业有限公司 | A kind of copper pipe annealing system |
| CN109201770B (en) * | 2018-09-13 | 2021-04-09 | 河北欧通有色金属制品有限公司 | Processing method of large-caliber overlong copper coil |
| CN209391539U (en) * | 2018-10-30 | 2019-09-17 | 漳州优而美金属制造有限公司 | A kind of movable pylon of adjustable height and length |
| CN210920440U (en) * | 2019-09-05 | 2020-07-03 | 广州睿联电气科技有限公司 | Corrugated pipe joint |
| CN111826226A (en) * | 2020-07-16 | 2020-10-27 | 常州市九鑫铜业有限公司 | Steel pipe drawing oil and preparation method and application thereof |
-
2021
- 2021-02-19 CN CN202110188764.8A patent/CN113231486B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN113231486A (en) | 2021-08-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208644899U (en) | A kind of uniform filling device of thin-wall sleeve tube kind part cylindricalo grinding | |
| CN113231486B (en) | Manufacturing process of high-precision welding-free special copper coil | |
| CN107443019B (en) | The cold duplex forging manufacturing process of temperature of deep hole input shaft | |
| KR20120098735A (en) | Spark plug and method for producing spark plug | |
| CN104439995A (en) | Making technology for transmission double-end internal-teeth ring of electric forklift | |
| CN102161151A (en) | Method of manufacturing oil cooler for automatic transmission | |
| CN104235536B (en) | Connecting tube, hard tube connector structure as well as device and method for machining connecting tube | |
| KR101684858B1 (en) | A method for manufacturing a lock sleeve | |
| CN100391648C (en) | Method for manufacturing oil pipe in external upset | |
| CN116422783A (en) | Surface quality control method for heat exchange tube during hydraulic expansion connection of tube and tube plates of nuclear power heat exchanger | |
| CN115647181A (en) | Cold forming method for flexible medium of large-diameter titanium alloy inner U-shaped inner ring | |
| CN101885018B (en) | Viscoelasto-plastic soft mode forming method of minor-radius corrugated surface thin-wall metal barrel part | |
| CN111644506B (en) | Female die assembly for punching thin annular tooth-shaped piece and preparation method thereof | |
| CN114215943A (en) | Ultralow temperature check valve | |
| CN111872212A (en) | Pipe sealing method | |
| CN211728428U (en) | Oil pressure quick positioning device | |
| CN103861887A (en) | Preparation method of high-performance copper/titanium bimetal capillary tube | |
| CN108515323B (en) | Expansion-joint type welding stretching connecting pipe and implementation process thereof | |
| CN112122376A (en) | Cold extrusion process for manufacturing seamless oblique steel tee | |
| CN111346999A (en) | Preparation method of piston tube | |
| CN216240480U (en) | High-pressure-bearing and impact-resistant petroleum pipe joint based on forged piece | |
| KR102145284B1 (en) | Apparatus for making the preform of a flange | |
| CN211804307U (en) | Electrode connecting rod for welding | |
| CN117086122A (en) | Processing method of ultrathin copper pipe for micro-heat pipe | |
| CN114227571B (en) | General frock of belleville spring stabilization treatment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |