CN112439837A - Four-way valve body production process - Google Patents
Four-way valve body production process Download PDFInfo
- Publication number
- CN112439837A CN112439837A CN202011220154.3A CN202011220154A CN112439837A CN 112439837 A CN112439837 A CN 112439837A CN 202011220154 A CN202011220154 A CN 202011220154A CN 112439837 A CN112439837 A CN 112439837A
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- Prior art keywords
- metal pipe
- valve body
- cylinder
- mold
- cavity
- Prior art date
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 239000002184 metal Substances 0.000 claims abstract description 60
- 229910052751 metal Inorganic materials 0.000 claims abstract description 60
- 239000007788 liquid Substances 0.000 claims abstract description 29
- 238000007789 sealing Methods 0.000 claims abstract description 21
- 238000004140 cleaning Methods 0.000 claims abstract description 15
- 238000000465 moulding Methods 0.000 claims abstract description 6
- 238000007493 shaping process Methods 0.000 claims abstract description 6
- 238000007605 air drying Methods 0.000 claims abstract description 5
- 238000005520 cutting process Methods 0.000 claims abstract description 5
- 238000004806 packaging method and process Methods 0.000 claims abstract description 5
- 238000004080 punching Methods 0.000 claims abstract description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 18
- 239000010935 stainless steel Substances 0.000 claims description 18
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 12
- 229910052802 copper Inorganic materials 0.000 claims description 12
- 239000010949 copper Substances 0.000 claims description 12
- 239000000243 solution Substances 0.000 claims description 10
- 238000000137 annealing Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000012670 alkaline solution Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims 1
- 239000010931 gold Substances 0.000 claims 1
- 229910052737 gold Inorganic materials 0.000 claims 1
- 238000000034 method Methods 0.000 description 6
- 238000009434 installation Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
Images
Classifications
-
- 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
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/001—Shaping combined with punching, e.g. stamping and perforating
-
- 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
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—Deforming tubular bodies
- B21D26/047—Mould construction
-
- 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
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/002—Processes combined with methods covered by groups B21D1/00 - B21D31/00
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Valve Housings (AREA)
Abstract
The invention discloses a four-way valve body production process, which comprises the following steps: a. cutting the metal pipe into corresponding lengths according to the size of the valve body; b. two end faces of the cut metal pipe are turned into planes, burrs are removed to enable the metal pipe to be in line with the actual required length, and then the metal pipe is cleaned; c. putting the metal pipe into a mould and locking; d. injecting liquid into the mold and pressurizing the liquid to a sufficient pressure until the metal pipe is forced to flow to fill the reserved space of the mold for molding; e. punching a pre-hole flanging position of the metal pipe by using a punch; f. carrying out at least one hole flanging forming on each pre-flanging position on the metal pipe by adopting a hole flanging punch; g. shaping inner cavities at two end parts of the metal pipe and the flanging hole on the metal pipe to form a complete valve body; h. cleaning the valve body with cleaning liquid and performing air drying treatment; j. and (6) packaging. The invention can reduce the cost, improve the production efficiency and improve the connection sealing performance at the valve body interface.
Description
Technical Field
The invention relates to the field of valve body production, in particular to a four-way valve body production process.
Background
The four-way reversing valve is one of important parts in an air conditioner, is arranged near a compressor, can generate vibration when the compressor runs, and has very high requirement on welding firmness of a connecting pipe of the four-way reversing valve.
A valve body of a traditional four-way reversing valve comprises a valve body, a valve seat, a D connecting pipe, a C connecting pipe, an E connecting pipe and an S connecting pipe. The valve body is a straight-through tubular component, and is provided with a through hole corresponding to the D connecting pipe and 3 through holes corresponding to the C, E, S connecting pipes; the cross section of the valve seat is D-shaped, the valve seat is provided with 3 valve seat holes, the depth of the hole wall of each valve seat hole is intersected because of the arc surface of the valve seat, and the hole diameter of the arc surface is larger than that of the plane of the valve seat; the arc surface of the valve seat is attached to the inner surface of the valve body; the D connecting pipe is welded with a corresponding D connecting pipe through hole on the valve body, and the C connecting pipe, the E connecting pipe and the S connecting pipe are respectively welded through the through hole on the valve body and the through hole on the valve seat in sequence. The valve seat has the defects that three valve seat holes of the valve seat are stepped holes, cannot be formed by stamping and need to be machined, so that the manufacturing cost is high, and the valve seat and the valve body are of a separated structure, so that the valve seat and the valve body need to be connected in a welding mode and the like, so that the sealing performance is poor.
Therefore, a new solution is needed to solve this problem.
Disclosure of Invention
The invention aims to solve the problems and provide a four-way valve body production process.
The technical purpose of the invention is realized by the following technical scheme: a production process of a four-way valve body comprises the following steps:
a. cutting the metal pipe into corresponding lengths according to the size of the valve body;
b. two end faces of the cut metal pipe are turned into planes, burrs are removed to enable the metal pipe to be in line with the actual required length, and then the metal pipe is cleaned;
c. putting the metal pipe into a mould and locking;
d. injecting liquid into the mold and pressurizing the liquid to a sufficient pressure until the metal pipe is forced to flow to fill the reserved space of the mold for molding;
e. punching a pre-hole flanging position of the metal pipe by using a punch;
f. carrying out at least one hole flanging forming on each pre-flanging position on the metal pipe by adopting a hole flanging punch;
g. shaping inner cavities at two end parts of the metal pipe and the flanging hole on the metal pipe to form a complete valve body;
h. cleaning the valve body with cleaning liquid and performing air drying treatment;
j. and (6) packaging.
Through adopting above-mentioned technical scheme, adopt above-mentioned technology to process the tubular metal resonator, the takeover hole of being connected with C, E, S takeover on the valve body all is the shaping of direct hole flanging, can save the disk seat structure before, can reduce cost, improve production efficiency, can improve the connection leakproofness of this valve body kneck again greatly to improve its use value.
The invention is further configured to: the metal tube is a copper tube.
The invention is further configured to: the metal pipe is a stainless steel pipe, the stainless steel pipe is required to be placed into a mesh belt furnace for annealing between the step b and the step c, and the annealing temperature is controlled to be 10-40 ℃.
By adopting the technical scheme, the stainless steel pipe is annealed before being subjected to pressure deformation, so that the hardness of the stainless steel pipe can be reduced, the plasticity of the stainless steel pipe is improved, the deformation processing is facilitated, the residual internal stress in the stainless steel pipe can be eliminated, the situations of deformation, cracking and the like are prevented, and the processing quality is improved.
The invention is further configured to: the die comprises an upper die and a lower die, wherein a cavity is formed in the center of the inner part of the lower die, a plurality of semicircular vertical grooves I are formed in the peripheral wall of the cavity, a die core is installed in the cavity, semicircular vertical grooves II matched with the semicircular vertical grooves I are formed in the outer side surface of the die core, a cylinder I used for being inserted into a metal tube is fixedly connected to the bottom surface of each semicircular vertical groove II, a pressurizing cavity used for pressurizing the metal tube by liquid is formed between the cylinder I and the semicircular vertical grooves II, a die cavity is formed in the middle of one side, facing the pressurizing cavity, of the cylinder I, a plurality of cylinder II matched with the cylinder I and used for being inserted into the metal tube is fixedly connected to the lower surface of the upper die, the cylinder II and the cylinder I are combined to form a cylinder, the diameter of the cylinder is the same as the inner diameter of the metal tube, and, the lower surface of the upper die is positioned on the periphery of the cylinder and fixedly connected with a sealing block used for sealing the pressurizing cavity, the centers of the mold core and the upper die are provided with a liquid inlet, and a flow passage is communicated between the liquid inlet and the pressurizing cavity.
By adopting the technical scheme, when in use, the mold core is firstly aligned and placed into the cavity, so that the semicircular vertical groove I of the cavity and the semicircular vertical groove I of the mold core form a complete cylindrical cavity, then the metal pipe is sleeved on the cylinder I, then the upper die cover is fixed on the lower die, so that the cylinder II of the upper die is clamped into the metal tube, the outer side surface of the combination of the cylinder I and the cylinder is attached to the inner wall of the metal tube, the sealing block is clamped into the upper part of the pressurizing cavity, the sealing of the pressurizing cavity is realized, then continuously injecting liquid into the liquid inlet through the pipeline, allowing the liquid to enter the pressurizing cavity through the flow passage and extrude the outer side wall of the metal tube, pressing part of the metal tube into the cavity, separating the upper die from the lower die after molding, and then the formed metal pipe is moved to the pressurizing cavity for a certain distance and then taken out, and the whole process is simple and convenient.
The invention is further configured to: the bottom surface of cavity has seted up the constant head tank, the bottom surface fixedly connected with locating piece of core, the locating piece card is gone into in the constant head tank and is used for prescribing a limit to the circumferential position of core.
Through adopting above-mentioned technical scheme, through setting up locating piece and the constant head tank of mutually supporting, can play the positioning action to the installation of core to guarantee the accuracy of installation.
The invention is further configured to: and arc-shaped guide surfaces are arranged on the lower surface edges of the positioning block and the cylinder II.
The invention is further configured to: the upper surface edge of lower mould has seted up sealed annular, the lower surface edge fixedly connected with of going up the mould and sealed annular matched with sealed annular limit, go up mould and lower mould and pass through bolt fixed connection.
Through adopting above-mentioned technical scheme, through setting up the sealed annular of mutually supporting and sealed ring limit, further improve sealed effect.
The invention is further configured to: the cleaning solution is clear water or alkalescent solution.
In conclusion, the invention has the following beneficial effects:
the process is adopted to process the metal pipe, and the connecting pipe holes connected with the C, E, S connecting pipe on the valve body are all formed by directly flanging, so that the prior valve seat structure can be omitted, the cost can be reduced, the production efficiency can be improved, the connection sealing performance at the connector of the valve body can be greatly improved, and the use value of the valve body can be improved.
Drawings
FIG. 1 is a schematic structural view of a valve body according to the present invention;
FIG. 2 is an exploded view of the mold of the present invention;
FIG. 3 is a cross-sectional view of a mold of the present invention;
FIG. 4 is a schematic structural view of an upper mold of the present invention;
FIG. 5 is a schematic view of the structure of the core of the present invention.
Reference numerals: 1. an upper die; 11. a second column body; 12. a sealing block; 13. sealing the annular edge; 2. a lower die; 21. a cavity; 22. a semicircular vertical groove I; 23. sealing the ring groove; 24. positioning a groove; 3. a core; 31. a first column body; 311. a cavity; 32. a pressurization cavity; 33. a flow channel; 34. positioning blocks; 4. a liquid inlet; 5. and (4) bolts.
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.
The first embodiment is as follows: referring to fig. 1, a production process of a four-way valve body comprises the following steps:
a. cutting the copper pipe into corresponding lengths according to the size of the valve body;
b. two end faces of the cut copper pipe are turned into planes, burrs are removed to enable the copper pipe to be in line with the actual required length, and then the copper pipe is cleaned;
c. putting the copper pipe into a die and locking;
d. injecting liquid into the mold and pressurizing the liquid to a sufficient pressure until the copper pipe is forced to flow to fill the reserved space of the mold for molding;
e. punching a pre-hole flanging position of the copper pipe by using a punch;
f. carrying out at least one hole flanging forming on each pre-flanging position on the copper pipe by adopting a hole flanging punch;
g. shaping inner cavities at two end parts of the copper pipe and the flanging hole on the copper pipe to form a complete valve body;
h. cleaning the valve body by using a cleaning solution and performing air drying treatment, wherein the cleaning solution is clear water or a weak alkaline solution;
j. and (6) packaging.
Example two: referring to fig. 1, a production process of a four-way valve body comprises the following steps:
a. cutting the stainless steel pipe into corresponding lengths according to the size of the valve body;
b. and (3) inverting two end faces of the cut stainless steel pipe into planes, removing burrs to enable the two end faces to meet the actual required length, cleaning the stainless steel pipe, airing, putting the stainless steel pipe into a mesh belt furnace for annealing, and controlling the annealing temperature to be 10-40 ℃.
c. Putting the stainless steel pipe into a mould and locking;
d. injecting liquid into the mold and pressurizing the liquid to a sufficient pressure until the stainless steel pipe is forced to flow to fill the reserved space of the mold for molding;
e. punching a pre-hole flanging position of the stainless steel pipe by using a punch;
f. carrying out at least one hole flanging forming on each pre-flanging position on the stainless steel pipe by adopting a hole flanging punch;
g. shaping inner cavities at two end parts of the stainless steel pipe and the flanging hole on the stainless steel pipe to form a complete valve body;
h. cleaning the valve body by using a cleaning solution and performing air drying treatment, wherein the cleaning solution is clear water or a weak alkaline solution;
j. and (6) packaging.
The metal pipe is processed by adopting the process, and the connecting pipe holes connected with the C, E, S connecting pipe on the valve body are formed by directly flanging, so that the prior valve seat structure can be omitted, the cost can be reduced, the production efficiency can be improved, the connection sealing performance at the connector of the valve body can be greatly improved, and the use value of the valve body can be improved.
Referring to fig. 2, 3, 4 and 5, the mold comprises an upper mold 1 and a lower mold 2, a cavity 21 is formed in the center of the lower mold 2, a plurality of semicircular vertical grooves 22 are formed in the peripheral wall of the cavity 21, a mold core 3 is installed in the cavity 21, a semicircular vertical groove two matched with the semicircular vertical groove 22 is formed in the outer side surface of the mold core 3, a cylinder one 31 inserted into the metal pipe is fixedly connected to the bottom surface of each semicircular vertical groove two, a pressurizing cavity 32 used for pressurizing the metal pipe by liquid is formed between the cylinder one 31 and the semicircular vertical groove two, a cavity 311 is formed in the middle of one side of the cylinder one 31 facing the pressurizing cavity 32, a plurality of cylinder two 11 matched with the cylinder one 31 and inserted into the metal pipe is fixedly connected to the lower surface of the upper mold 1, an arc-shaped guide surface is inverted on the lower surface edge of the cylinder two 11, and the cylinder one 31 are combined to form, the diameter of the cylinder is the same as the inner diameter of the metal pipe, the cross section area of the second cylinder 11 is larger than that of the first cylinder 31, the sealing block 12 used for sealing the pressurizing cavity 32 is fixedly connected to the periphery of the second cylinder 11 on the lower surface of the upper die 1, the liquid inlet 4 is formed in the center of the mold core 3 and the center of the upper die 1, and the flow passage 33 is communicated between the liquid inlet 4 and the pressurizing cavity 32.
When in use, the core 3 is aligned and placed into the cavity 21, so that the semicircular vertical groove I22 of the cavity 21 and the semicircular vertical groove II of the core 3 form a complete cylindrical cavity, then the metal pipe is sleeved on the cylinder I31, then the upper die 1 is covered and fixed on the lower die 2, so that the cylinder II 11 of the upper die 1 is clamped into the metal pipe, the outer side surface formed by the combination of the cylinder I31 and the cylinder II 11 is attached to the inner wall of the metal pipe, the sealing block 12 is clamped on the upper part of the pressurizing cavity 32 to realize the sealing of the pressurizing cavity 32, then liquid is continuously injected into the liquid inlet 4 through a pipeline, the liquid enters the pressurizing cavity 32 through the flow passage 33 and extrudes the outer side wall of the metal pipe, so that the part of the metal pipe is pressed into the die cavity 311, the upper die 1 is separated from the lower die 2 after the forming is finished, then the formed metal pipe is pressurized and moved to the cavity 32 for, the whole process is simple and convenient.
Referring to fig. 3 and 5, a positioning groove 24 is formed in the bottom surface of the cavity 21, a positioning block 34 is fixedly connected to the bottom surface of the mold core 3, the positioning block 34 is clamped in the positioning groove 24 to limit the circumferential position of the mold core 3, and an arc-shaped guide surface is also inverted on the edge of the lower surface of the positioning block 34.
Through setting up mutually supporting locating piece 34 and constant head tank 24, can play the positioning action to the installation of core 3 to guarantee the accuracy of installation.
Referring to fig. 2 and 3, a sealing ring groove 23 is formed in an edge of an upper surface of the lower die 2, a sealing ring edge 13 matched with the sealing ring groove 23 is fixedly connected to an edge of a lower surface of the upper die 1, and the upper die 1 and the lower die 2 are fixedly connected through a bolt 5.
Through adopting above-mentioned technical scheme, through setting up the sealed annular groove 23 and the sealed ring limit 13 of mutually supporting, further improve sealed effect.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (8)
1. A production process of a four-way valve body is characterized by comprising the following steps:
a. cutting the metal pipe into corresponding lengths according to the size of the valve body;
b. two end faces of the cut metal pipe are turned into planes, burrs are removed to enable the metal pipe to be in line with the actual required length, and then the metal pipe is cleaned;
c. putting the metal pipe into a mould and locking;
d. injecting liquid into the mold and pressurizing the liquid to a sufficient pressure until the metal pipe is forced to flow to fill the reserved space of the mold for molding;
e. punching a pre-hole flanging position of the metal pipe by using a punch;
f. carrying out at least one hole flanging forming on each pre-flanging position on the metal pipe by adopting a hole flanging punch;
g. shaping inner cavities at two end parts of the metal pipe and the flanging hole on the metal pipe to form a complete valve body;
h. cleaning the valve body with cleaning liquid and performing air drying treatment;
j. and (6) packaging.
2. The production process of the four-way valve body according to claim 1, wherein the metal pipe is a copper pipe.
3. The production process of the four-way valve body according to claim 1, wherein the metal pipe is a stainless steel pipe, the stainless steel pipe is placed into a mesh belt furnace for annealing between the step b and the step c, and the annealing temperature is controlled to be 10-40 ℃.
4. The production process of the four-way valve body according to claim 1, wherein the mold comprises an upper mold (1) and a lower mold (2), a cavity (21) is formed in the center of the interior of the lower mold (2), a plurality of semicircular vertical grooves I (22) are formed in the peripheral wall of the cavity (21), a mold core (3) is installed in the cavity (21), a semicircular vertical groove II matched with the semicircular vertical grooves I (22) is formed in the outer side surface of the mold core (3), a cylinder I (31) used for being inserted into the metal pipe is fixedly connected to the bottom surface of each semicircular vertical groove II, a pressurizing cavity (32) used for pressurizing the metal pipe by liquid is formed between the cylinder I (31) and the semicircular vertical groove II, a mold cavity (311) is formed in the middle of one side, facing the pressurizing cavity (32), of the cylinder I (31), and a plurality of pressurizing cavities matched with the cylinder I (31) and used for inserting gold are fixedly connected to the lower surface of the Belong to intraductal cylinder two (11), cylinder two (11) with cylinder one (31) combination forms a cylinder, and the diameter of this cylinder is the same with the metal tube internal diameter, just the cross sectional area of cylinder two (11) is greater than the cross sectional area of cylinder one (31), the lower surface of going up mould (1) is located cylinder two (11) around fixedly connected with be used for sealed seal block (12) that add pressure chamber (32), core (3) and the center department of going up mould (1) have seted up liquid and have led to mouth (4), the intercommunication has runner (33) between liquid lead to mouth (4) and pressure chamber (32).
5. The production process of the four-way valve body according to claim 4, wherein a positioning groove (24) is formed in the bottom surface of the cavity (21), a positioning block (34) is fixedly connected to the bottom surface of the core (3), and the positioning block (34) is clamped into the positioning groove (24) to limit the circumferential position of the core (3).
6. The production process of the four-way valve body according to claim 5, wherein the lower surface edges of the positioning block (34) and the second cylinder (11) are provided with arc-shaped guide surfaces.
7. The production process of the four-way valve body according to claim 4, wherein a sealing ring groove (23) is formed in the edge of the upper surface of the lower die (2), a sealing ring edge (13) matched with the sealing ring groove (23) is fixedly connected to the edge of the lower surface of the upper die (1), and the upper die (1) and the lower die (2) are fixedly connected through bolts (5).
8. The production process of the four-way valve body as claimed in claim 1, wherein the cleaning solution is clear water or a weak alkaline solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011220154.3A CN112439837B (en) | 2020-11-05 | 2020-11-05 | Four-way valve body production process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011220154.3A CN112439837B (en) | 2020-11-05 | 2020-11-05 | Four-way valve body production process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112439837A true CN112439837A (en) | 2021-03-05 |
| CN112439837B CN112439837B (en) | 2022-06-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011220154.3A Active CN112439837B (en) | 2020-11-05 | 2020-11-05 | Four-way valve body production process |
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| CN (1) | CN112439837B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013158818A (en) * | 2012-02-07 | 2013-08-19 | Nippon Steel & Sumitomo Metal Corp | Method of manufacturing hollow member for welding by hydroforming |
| CN106391849A (en) * | 2016-11-30 | 2017-02-15 | 广州沃福模具有限公司 | Punching method for production of taper pipe |
| CN108015166A (en) * | 2016-11-04 | 2018-05-11 | 佛山市顺德区博奇模具有限公司 | It is a kind of to rush flange hole technology without waste material |
| CN109773019A (en) * | 2018-12-25 | 2019-05-21 | 宁波思明汽车科技股份有限公司 | EGR shell oral area hole-crimped forming technique |
| CN109773020A (en) * | 2018-12-25 | 2019-05-21 | 宁波思明汽车科技股份有限公司 | The preparation method of car thin-wall structural member |
| CN209682767U (en) * | 2019-03-14 | 2019-11-26 | 郑州郑飞橡塑制品有限责任公司 | A kind of pressure injection mold of beckophen part |
| CN210257095U (en) * | 2019-01-24 | 2020-04-07 | 莱芜市春雨滴灌技术有限公司 | Dripper cavity processing device |
-
2020
- 2020-11-05 CN CN202011220154.3A patent/CN112439837B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013158818A (en) * | 2012-02-07 | 2013-08-19 | Nippon Steel & Sumitomo Metal Corp | Method of manufacturing hollow member for welding by hydroforming |
| CN108015166A (en) * | 2016-11-04 | 2018-05-11 | 佛山市顺德区博奇模具有限公司 | It is a kind of to rush flange hole technology without waste material |
| CN106391849A (en) * | 2016-11-30 | 2017-02-15 | 广州沃福模具有限公司 | Punching method for production of taper pipe |
| CN109773019A (en) * | 2018-12-25 | 2019-05-21 | 宁波思明汽车科技股份有限公司 | EGR shell oral area hole-crimped forming technique |
| CN109773020A (en) * | 2018-12-25 | 2019-05-21 | 宁波思明汽车科技股份有限公司 | The preparation method of car thin-wall structural member |
| CN210257095U (en) * | 2019-01-24 | 2020-04-07 | 莱芜市春雨滴灌技术有限公司 | Dripper cavity processing device |
| CN209682767U (en) * | 2019-03-14 | 2019-11-26 | 郑州郑飞橡塑制品有限责任公司 | A kind of pressure injection mold of beckophen part |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112439837B (en) | 2022-06-24 |
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Denomination of invention: Production process of four-way valve body Effective date of registration: 20221211 Granted publication date: 20220624 Pledgee: Bank of Hangzhou Limited by Share Ltd. Shaoxing Xinchang branch Pledgor: Zhejiang three sets of stainless steel Co.,Ltd. Registration number: Y2022330003597 |
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