CN109365659B - Reaming processingequipment of air conditioner refrigeration copper pipe - Google Patents
Reaming processingequipment of air conditioner refrigeration copper pipe Download PDFInfo
- Publication number
- CN109365659B CN109365659B CN201811451573.0A CN201811451573A CN109365659B CN 109365659 B CN109365659 B CN 109365659B CN 201811451573 A CN201811451573 A CN 201811451573A CN 109365659 B CN109365659 B CN 109365659B
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- reaming
- adjusting
- copper pipe
- reamer
- platform body
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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
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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
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B47/00—Drives or gearings; Equipment therefor
- B24B47/20—Drives or gearings; Equipment therefor relating to feed movement
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/35—Accessories
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/36—Single-purpose machines or devices
- B24B5/48—Single-purpose machines or devices for grinding walls of very fine holes, e.g. in drawing-dies
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jigs For Machine Tools (AREA)
- Drilling And Boring (AREA)
Abstract
The invention discloses a reaming processing device for an air-conditioning refrigeration copper pipe, which comprises a reaming table body and a reaming adjusting column, wherein the reaming adjusting column is movably connected to the reaming table body; when the copper pipe is further processed, all tools required to be used are arranged on one device, and the operation can be directly carried out when the copper pipe is processed; when the copper pipe is processed, the pressing plate only can be directly placed on the ground or the ground after the copper pipe is clamped by the pressing plate, and the triangular support plate can play a role in stably supporting; through with reamer elastic connection, when polishing the copper pipe, only need press the reamer downwards and rotatory simultaneously, both conveniently polish and convenient operation.
Description
Technical Field
The invention relates to the technical field of machining devices, in particular to a reaming device for an air conditioner refrigeration copper pipe.
Background
The air conditioner is provided with two connecting pipes with larger sizes respectively, wherein the thick connecting pipe is called a large pipe, the thin connecting pipe is called a small pipe, the connecting pipes are used for connecting an internal machine and an external machine, so that the internal machine and the external machine form a closed system, a refrigerant can circularly flow in the internal machine and the external machine, the large pipe is generally used for conveying gaseous refrigerants, the small pipe is used for conveying liquid refrigerants, and as to which inlet and which outlet, the air conditioner needs to be different according to different refrigeration and heating modes of the air conditioner, and in the refrigeration mode, the air conditioner can be connected by using copper pipes; so as to achieve the purpose of convenient operation, but the following disadvantages still exist in the practical use:
1. in a refrigeration mode, a refrigerant enters an inner machine from an outer machine through a small pipe and returns to the outer machine through a large pipe, and for copper pipe connection, the copper pipe needs to be further processed;
2. the copper can change the shape, because the copper pipe can be bent and deformed, the copper pipe can be often made into an elbow and a connector, and when the copper pipe is made into the connector, the copper pipe generally needs to be reamed into a bell mouth so as to be conveniently and tightly connected with a connecting pipe, an operator needs to clamp a clamping plate with one hand and rotate a reamer with the other hand in the reaming process, and unsmooth reaming or deviation of reaming can be easily caused if the operator does not pay attention;
3. when copper pipe reaming processing, need polish the interface of copper pipe to better reaming, and many times, can directly omit this step for easy operation, lead to the interface of copper pipe not smooth enough.
Disclosure of Invention
The invention aims to provide a reaming processing device for an air-conditioning refrigeration copper pipe, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a reaming processing device for an air-conditioning refrigeration copper pipe comprises a reaming table body and a reaming adjusting column, wherein the reaming adjusting column is movably connected to the reaming table body, a reamer penetrates through the reaming table body and is provided with an annular groove, an annular connecting seat is sleeved on the annular groove, first springs are fixedly connected to two sides of the annular connecting seat, the other end of each first spring is fixedly connected to the inner wall of a through hole, a reaming drill bit is connected to the lower end of the reaming adjusting column, the reaming drill bit is arranged in a limiting groove, a first sliding groove is formed in the bottom end of the reaming table body, an adjusting portal frame is arranged below the first sliding groove, an upper cross is fixedly connected to the upper end of the adjusting portal frame, a moving column is fixedly connected to the upper end of the upper cross, a second spring is connected to the middle of the upper cross, and the lower end of the adjusting portal frame is movably connected to an adjusting clamping plate, the adjustable clamping device is characterized in that a second sliding groove is formed in the adjusting clamping plate, a hinge is arranged on one side of the adjusting clamping plate, a fixing hole is formed in the side edge of the other side of the adjusting clamping plate, a fixing column is screwed in the fixing hole, the lower end of the adjusting clamping plate is fixedly connected with an one-way hydraulic telescopic rod, the bottom end of the one-way hydraulic telescopic rod is movably connected with a triangular supporting plate, and a copper pipe is clamped on the adjusting clamping plate.
Preferably, limiting groove and through-hole have been seted up on the reaming platform body, limiting groove and through-hole all run through the setting of reaming platform body, and the limiting groove is provided with the internal thread, is provided with the external screw thread on the reaming regulation post that corresponds.
Preferably, the cross-sectional area of the reamer is smaller than the inner cross-sectional area of the through hole, the reamer is divided into an upper part and a lower part, the lower part of the reamer is a bent reamer, and the upper part of the reamer is a reamer handle.
Preferably, the adjusting portal frame is a left part and a right part which are symmetrically arranged, the middle of the upper ends of the left part and the right part is connected by a second spring, and the width of the lower part of the adjusting portal frame is equal to the width of the inner section of the second sliding groove.
Preferably, a plurality of through-holes have been seted up in the middle of adjusting splint, and the radius size of a plurality of through-holes is all inequality, and the one end intermediate junction of adjusting splint has the hinge, and the side of the other end of adjusting splint runs through and is provided with the fixed orifices.
Preferably, the bottom end of the reaming table body is provided with two first sliding grooves, and the two first sliding grooves are respectively arranged on two sides of the reaming table body.
Preferably, the lower end of the adjusting clamp plate is fixedly connected with a one-way hydraulic telescopic rod, the bottom end of the one-way hydraulic telescopic rod is fixedly connected with a triangular support plate, and the bottom end of the triangular support plate is fixedly connected with an anti-slip pad.
Compared with the prior art, the invention has the beneficial effects that: the invention has reasonable structure and strong functionality, and has the following advantages:
1. when the copper pipe is further processed, all tools needed to be used are arranged on one device, and the copper pipe can be directly operated when being processed, so that the accident that the tools are scattered and cannot be found or lost when being used is reduced;
2. when the device is used for processing a copper pipe, the pressing plate only can be directly placed on the ground or the ground after clamping the copper pipe, and the triangular supporting plate can play a role in stable supporting;
3. the device is through with reamer elastic connection, when polishing the copper pipe, only needs to press down the reamer and rotate simultaneously, not only conveniently polish but also convenient operation.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an exploded view of the structure of the present invention;
FIG. 3 is a schematic view of the structure of the broaching station of the present invention;
FIG. 4 is a schematic view of the ring connector of the present invention;
FIG. 5 is a schematic view of the bottom of the body structure of the broaching station of the present invention;
fig. 6 is a schematic structural view of an adjusting portal frame of the present invention.
In the figure: the hole expanding device comprises a hole expanding table body 1, a hole expanding adjusting column 2, a hole expanding drill bit 3, a reamer 4, a ring groove 5, a ring connecting seat 6, a first spring 7, a limiting groove 8, a through hole 9, an adjusting portal frame 10, an upper transverse plate 11, a second spring 12, a moving column 13, a first sliding groove 14, an adjusting clamping plate 15, a fixing hole 16, a fixing column 17, a hinge 18, a second sliding groove 19, a one-way hydraulic telescopic rod 20, a triangular supporting plate 21 and a copper pipe 22.
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 derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 6, the present invention provides a technical solution: a reaming processing device for an air-conditioning refrigeration copper pipe comprises a reaming table body 1 and a reaming adjusting column 2, wherein the reaming adjusting column 2 is movably connected to the reaming table body 1, a reamer 4 penetrates through the reaming table body 1, an annular groove 5 is arranged on the reamer 4, an annular connecting seat 6 is sleeved on the annular groove 5, first springs 7 are fixedly connected to two sides of the annular connecting seat 6, the other end of each first spring 7 is fixedly connected to the inner wall of a through hole 9, a reaming drill bit 3 is connected to the lower end of the reaming adjusting column 2, the reaming drill bit 3 is arranged in a limiting groove 8, a first sliding groove 14 is formed in the bottom end of the reaming table body 1, an adjusting portal frame 10 is arranged below the first sliding groove 14, an upper transverse plate 11 is fixedly connected to the upper end of the adjusting portal frame 10, a moving column 13 is fixedly connected to the upper end of the upper transverse plate 11, a second spring 12 is connected to the middle of the upper transverse plate 11, the lower end of the adjusting portal frame 10, adjusting and being provided with second sliding tray 19 on the splint 15, adjusting one side of splint 15 and being provided with hinge 18, the side of the opposite side of adjusting splint 15 is provided with fixed orifices 16, and threaded connection has fixed column 17 in the fixed orifices 16, adjusts the one-way hydraulic telescoping rod 20 of the lower extreme fixedly connected with of splint 15, and the bottom swing joint of one-way hydraulic telescoping rod 20 has triangular support plate 21, and the clamp connects copper pipe 22 on the adjusting splint 15.
Furtherly, has seted up spacing groove 8 and through-hole 9 on the reaming platform body 1, and spacing groove 8 and through-hole 9 all run through reaming platform body 1 and set up, are provided with the internal thread in the spacing groove 8, are provided with the external screw thread on the reaming regulation post 2 that corresponds, and reaming regulation post 2 corresponds twists soon in spacing groove 8 to reach reaming purpose.
Further, the cross-sectional area of the reamer 4 is smaller than the inner cross-sectional area of the through hole 9, the reamer 4 is divided into an upper portion and a lower portion, the lower portion of the reamer 4 is a bent reamer, the upper portion of the reamer 4 is a reamer handle, and the reamer 4 performs certain polishing before reaming the copper pipe 22.
Further, the adjusting portal frame 10 is a left part and a right part, the left part and the right part are symmetrically arranged, the middle of the upper end of the left part and the right part is connected by a second spring 12, the width of the lower part of the adjusting portal frame 10 is equal to the width of the inner section of the second sliding groove 19, the adjusting portal frame 10 moves in the second sliding groove 19, and when the second sliding grooves 19 on the two sides are separated, the adjusting portal frame 10 rotates in the second sliding groove 19 by a certain angle.
Further, a plurality of through-holes have been seted up in the middle of adjusting splint 15, and the radius size of a plurality of through-holes is all inequality, and the one end intermediate junction of adjusting splint 15 has hinge 18, and the side of the other end of adjusting splint 15 runs through and is provided with fixed orifices 16, and adjusting splint 15 can press from both sides the copper pipe 22 that connects different widths, and plays fixed effect to copper pipe 22.
Further, the bottom end of the reaming table body 1 is provided with two first sliding grooves 14, the two first sliding grooves 14 are respectively arranged on two sides of the reaming table body 1, the moving column 13 moves in the first sliding grooves 14 correspondingly, and the moving range of the reaming table body 1 right above the adjusting clamp plate 15 is increased.
Further, the one-way hydraulic telescoping rod 20 of lower extreme fixedly connected with of adjusting splint 15, the bottom fixedly connected with triangular support plate 21 of one-way hydraulic telescoping rod 20, the equal fixedly connected with slipmat in bottom of triangular support plate 21 makes triangular support plate 21 more stable fix subaerial.
The working principle is as follows: when the device starts to work, the copper pipes 22 needing reaming are correspondingly placed in the adjusting clamp plates 15, one side of each adjusting clamp plate 15 is opened, different copper pipes 22 are correspondingly clamped in the slotted holes in the adjusting clamp plates 15, the adjusting clamp plates 15 are closed, and the adjusting clamp plates 15 on the two sides are fixed through the fixing columns 17; then adjusting the plurality of one-way hydraulic telescopic rods 20 according to the length of the copper pipe 22, fixing the triangular support plates 21 on the ground, supporting and fixing the whole device by the plurality of triangular support plates 21, adjusting the portal frame 10 at the bottom end of the reaming table body 1 to slide in the second sliding groove 19, enabling the bottom end of the reamer 4 to correspond to the upper end of the copper pipe 22, and directly loosening the reamer 4 after polishing to directly rebound to the original position under the action of the first spring 7 as the reamer 4 is movably connected in the through hole 9 through the first spring 7, downwards pressing the reamer 4 and polishing the reamer 4 in the upper end of the copper pipe 22 simultaneously, so that the reaming opening of the copper pipe 22 is smoother; the position of the reaming table body 1 is moved again, the reaming bit 3 is moved to the upper end position of the copper pipe 22, the limiting groove 8 plays a role in fixing and limiting the reaming adjusting column 2 and the reaming bit 3, when the reaming adjusting column 2 is screwed, the center of the reaming bit 3 is kept unchanged as much as possible, as the bottom end of the adjusting portal frame 10 moves in the second sliding groove 19, the moving column 13 at the upper end of the adjusting portal frame 10 moves in the first sliding groove 14 at the bottom end of the reaming table body 1, the corresponding position at the bottom end of the reaming table body 1 can move to a position right above the adjusting clamp plate 15, when the adjusting clamp plate 15 is opened, the adjusting portal frame 10 moves to one side close to the hinge 18, and the second spring 12 has certain stretching elasticity.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a reaming processingequipment of air conditioner refrigeration copper pipe, includes reaming platform body (1) and reaming regulation post (2), reaming regulation post (2) swing joint is on reaming platform body (1), its characterized in that: the reaming platform comprises a reaming platform body (1), limiting grooves (8) and through holes (9) are formed in the reaming platform body (1), the limiting grooves (8) and the through holes (9) all penetrate through the reaming platform body (1) and are arranged, reamers (4) penetrate through the reaming platform body (1), annular grooves (5) are formed in the reamers (4), annular connecting seats (6) are sleeved on the annular grooves (5), first springs (7) are fixedly connected to the two sides of the annular connecting seats (6), the other ends of the first springs (7) are fixedly connected to the inner wall of the through holes (9), reaming drill bits (3) are connected to the lower ends of reaming adjusting columns (2), the reaming drill bits (3) are arranged in the limiting grooves (8), first sliding grooves (14) are formed in the bottom end of the reaming platform body (1), adjusting portal frames (10) are arranged below the first sliding grooves (14), the upper end of the adjusting portal frame (10) is fixedly connected with an upper transverse plate (11), the upper end of the upper transverse plate (11) is fixedly connected with a moving column (13), the middle of the upper transverse plate (11) is connected with a second spring (12), the lower end of the adjusting portal frame (10) is movably connected on an adjusting clamping plate (15), a second sliding groove (19) is arranged on the adjusting splint (15), a hinge (18) is arranged on one side of the adjusting splint (15), a fixing hole (16) is arranged on the side edge of the other side of the adjusting splint (15), a fixed column (17) is screwed in the fixed hole (16), the lower end of the adjusting clamping plate (15) is fixedly connected with a one-way hydraulic telescopic rod (20), the bottom end of the one-way hydraulic telescopic rod (20) is movably connected with a triangular supporting plate (21), and a copper pipe (22) is clamped on the adjusting clamping plate (15).
2. A reaming processing device for an air conditioning refrigeration copper pipe according to claim 1, characterized in that: internal threads are arranged in the limiting groove (8), and external threads are arranged on the corresponding reaming adjusting columns (2).
3. A reaming processing device for an air conditioning refrigeration copper pipe according to claim 1, characterized in that: the cross-sectional area of the reamer (4) is smaller than the inner cross-sectional area of the through hole (9), the reamer (4) is divided into an upper part and a lower part, the lower part of the reamer (4) is a bent reamer, and the upper part of the reamer (4) is a reamer handle.
4. A reaming processing device for an air conditioning refrigeration copper pipe according to claim 1, characterized in that: the adjusting portal frame (10) is a left part and a right part which are symmetrically arranged, the middle of the upper ends of the left part and the right part is connected by a second spring (12), and the width of the lower part of the adjusting portal frame (10) is equal to the width of the inner section of the second sliding groove (19).
5. A reaming processing device for an air conditioning refrigeration copper pipe according to claim 1, characterized in that: a plurality of through holes are formed in the middle of the adjusting clamping plate (15), the radius sizes of the through holes are different, a hinge (18) is connected between the middle of one end of the adjusting clamping plate (15), and a fixing hole (16) penetrates through the side face of the other end of the adjusting clamping plate (15).
6. A reaming processing device for an air conditioning refrigeration copper pipe according to claim 1, characterized in that: the bottom of reaming platform body (1) is provided with first sliding tray (14), first sliding tray (14) are provided with two, and two first sliding trays (14) set up respectively on the both sides of reaming platform body (1).
7. A reaming processing device for an air conditioning refrigeration copper pipe according to claim 1, characterized in that: the bottom ends of the triangular supporting plates (21) are fixedly connected with anti-slip pads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811451573.0A CN109365659B (en) | 2018-11-30 | 2018-11-30 | Reaming processingequipment of air conditioner refrigeration copper pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811451573.0A CN109365659B (en) | 2018-11-30 | 2018-11-30 | Reaming processingequipment of air conditioner refrigeration copper pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109365659A CN109365659A (en) | 2019-02-22 |
| CN109365659B true CN109365659B (en) | 2020-04-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811451573.0A Active CN109365659B (en) | 2018-11-30 | 2018-11-30 | Reaming processingequipment of air conditioner refrigeration copper pipe |
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| Country | Link |
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| CN (1) | CN109365659B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113500147B (en) * | 2021-09-09 | 2021-11-26 | 艾芦精密机械(江苏)有限公司 | Production system for metal processing and working method thereof |
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| CN105414972A (en) * | 2015-12-15 | 2016-03-23 | 王永妍 | Special machine tool for drilling, expanding and reaming |
| CN105945165A (en) * | 2016-06-22 | 2016-09-21 | 无锡惠山泵业有限公司 | Hole reaming machine for valve pipe |
| CN107378025A (en) * | 2017-09-20 | 2017-11-24 | 成都融创智谷科技有限公司 | One kind prevents the inclined crankcase bearizing mechanism of reaming bit |
| CN206811540U (en) * | 2017-06-06 | 2017-12-29 | 鹰潭市众鑫成铜业有限公司 | A kind of copper pipe punches clamping device |
| CN207592632U (en) * | 2017-12-14 | 2018-07-10 | 山东双轮股份有限公司 | The reaming tooling of copper pipe |
| CN108555394A (en) * | 2018-04-11 | 2018-09-21 | 海亮（安徽）铜业有限公司 | Finished product copper tube reamer and its application method |
| CN207887803U (en) * | 2018-02-28 | 2018-09-21 | 广东志高科创铜业有限公司 | A kind of automatic machining device of idle call copper pipe |
| CN208067038U (en) * | 2018-04-03 | 2018-11-09 | 黄石恒盛科技发展有限公司 | A kind of compressor copper pipe pipe bender |
-
2018
- 2018-11-30 CN CN201811451573.0A patent/CN109365659B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2483271A1 (en) * | 1980-05-28 | 1981-12-04 | Gateau Internal | TUBE SHAPING APPARATUS |
| JP2003010930A (en) * | 2001-06-27 | 2003-01-15 | Toshiba Plant Kensetsu Co Ltd | Flare tool |
| CN105414972A (en) * | 2015-12-15 | 2016-03-23 | 王永妍 | Special machine tool for drilling, expanding and reaming |
| CN105945165A (en) * | 2016-06-22 | 2016-09-21 | 无锡惠山泵业有限公司 | Hole reaming machine for valve pipe |
| CN206811540U (en) * | 2017-06-06 | 2017-12-29 | 鹰潭市众鑫成铜业有限公司 | A kind of copper pipe punches clamping device |
| CN107378025A (en) * | 2017-09-20 | 2017-11-24 | 成都融创智谷科技有限公司 | One kind prevents the inclined crankcase bearizing mechanism of reaming bit |
| CN207592632U (en) * | 2017-12-14 | 2018-07-10 | 山东双轮股份有限公司 | The reaming tooling of copper pipe |
| CN207887803U (en) * | 2018-02-28 | 2018-09-21 | 广东志高科创铜业有限公司 | A kind of automatic machining device of idle call copper pipe |
| CN208067038U (en) * | 2018-04-03 | 2018-11-09 | 黄石恒盛科技发展有限公司 | A kind of compressor copper pipe pipe bender |
| CN108555394A (en) * | 2018-04-11 | 2018-09-21 | 海亮（安徽）铜业有限公司 | Finished product copper tube reamer and its application method |
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| Publication number | Publication date |
|---|---|
| CN109365659A (en) | 2019-02-22 |
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Effective date of registration: 20200312 Address after: 629000 No.9, Airport North Road, Suining economic and Technological Development Zone, Sichuan Province Applicant after: Sichuan snow source Automotive Air Conditioning Technology Co., Ltd. Address before: 261053 Shandong Vocational College of Science and Technology, 6388 Xihuan Road, Weifang City, Shandong Province Applicant before: Huang Yaoyong |
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