CN114515819A - Method for manufacturing integrally formed stainless steel water meter - Google Patents
Method for manufacturing integrally formed stainless steel water meter Download PDFInfo
- Publication number
- CN114515819A CN114515819A CN202011296524.1A CN202011296524A CN114515819A CN 114515819 A CN114515819 A CN 114515819A CN 202011296524 A CN202011296524 A CN 202011296524A CN 114515819 A CN114515819 A CN 114515819A
- Authority
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- China
- Prior art keywords
- wax
- stainless steel
- manufacturing
- mould
- integrally formed
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- 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.)
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Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 69
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 41
- 239000010935 stainless steel Substances 0.000 title claims abstract description 41
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000005266 casting Methods 0.000 claims abstract description 31
- 238000002347 injection Methods 0.000 claims abstract description 26
- 239000007924 injection Substances 0.000 claims abstract description 26
- 239000012528 membrane Substances 0.000 claims abstract description 11
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 238000002791 soaking Methods 0.000 claims description 7
- 238000000465 moulding Methods 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 4
- 238000007605 air drying Methods 0.000 claims description 3
- 238000007664 blowing Methods 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 238000005237 degreasing agent Methods 0.000 claims description 2
- 239000013527 degreasing agent Substances 0.000 claims description 2
- 239000004519 grease Substances 0.000 claims description 2
- 239000011159 matrix material Substances 0.000 claims 1
- 239000001993 wax Substances 0.000 description 80
- 239000011257 shell material Substances 0.000 description 16
- 229910000831 Steel Inorganic materials 0.000 description 10
- 239000010959 steel Substances 0.000 description 10
- 239000000243 solution Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000005495 investment casting Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 241000264877 Hippospongia communis Species 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
- B22C9/043—Removing the consumable pattern
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
- B22C7/02—Lost patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/12—Treating moulds or cores, e.g. drying, hardening
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/20—Stack moulds, i.e. arrangement of multiple moulds or flasks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention relates to a method for manufacturing a stainless steel water meter shell, which comprises the following steps: A) manufacturing a wax mould, wherein the wax mould comprises a wax mould framework and a wax piece, the wax mould framework comprises a horizontal part, a mould head and a vertical part which extend horizontally, the wax piece comprises a body part, a water inlet part and a water outlet part, the wax piece is connected to one side surface of the vertical part in a mode that the water outlet part faces upwards and the water inlet part faces downwards, the wax piece is also provided with a first guide injection pin, a second guide injection pin and a third guide injection pin, and the first guide injection pin, the second guide injection pin and the third guide injection pin are arranged in the vertical direction and extend in the horizontal direction approximately; B) forming a pouring film layer on the outer layer of the wax mould; C) dewaxing the membrane layer to obtain a membrane shell; D) baking the membrane shell; E) and injecting stainless steel water into the membrane shell, cooling and forming, and removing the membrane shell to obtain a stainless steel product. The casting yield of the cast stainless steel water meter body can be greatly ensured by manufacturing the cast water meter through the steps, and the problem of low casting yield in the casting process of the stainless steel water meter shell is solved.
Description
Technical Field
The invention relates to a method for manufacturing a water meter, in particular to a method for manufacturing an integrally formed stainless steel water meter.
Background
Stainless steel is resistant to weak corrosive media such as air, steam, water, etc., or stainless steel grades are called stainless steel. The stainless steel is not easy to corrode, rust or wear, is one of the highest-strength materials in the metal materials for the building, can permanently keep the integrity of the engineering design of the structural parts, can ensure the durability of the water meter shell by applying the stainless steel to the casting of the water meter shell, and can not have the problem that heavy metal exceeds the standard compared with the traditional water meter forming metal, namely copper, so as to ensure the water use safety.
In the process of manufacturing a stainless steel water meter, a plurality of problems occur in the manufacturing process. The stainless steel molten steel has poor fluidity and is not beneficial to integral molding casting, so that a plurality of casting modes of split casting exist in the prior art, namely, each part of the stainless steel water meter is cast and molded independently, and then each part is assembled by adopting a welding mode. However, if the split molding method is not adopted, the integral molding casting process is directly adopted, and a precise casting process with higher cost, namely a wax mold casting method, is required, wax is firstly injected to form a wax mold, then a film layer is covered according to the wax mold, and then the wax mold is melted to form a mold shell for pouring the stainless steel water. By adopting the casting mode, the stability and the safety of the stainless steel water meter shell after casting and forming can be greatly ensured, but the casting process still has the phenomenon of poor yield due to the design of a process link.
In a wax mould component in a commonly used casting process, a horizontal and sparse arrangement mode is adopted for wax pieces, a hole is formed in the middle of the wax piece, and the wax mould component is designed according to the design concept that the wax mould component is heated uniformly, air is conveniently discharged, and the flowing distance of molten steel is reduced. However, because the traditional arrangement mode adopts horizontal arrangement, molten steel flows and lacks pressure, and waste products are formed at the corner of a wax piece because the molten steel cannot be fully poured. Meanwhile, the horizontal arrangement is not beneficial to the discharge of air in the wax piece, the incomplete air discharge is often caused, the temperature of the mold shell is higher, the crystal water of the mold shell material can be decomposed at high temperature to generate oxygen, and the oxygen and the surface of molten steel are subjected to oxidation reaction, so that pockmarks are generated on the surface of a casting, honeycombs are seriously generated, and the quality of a product is seriously influenced.
In summary, a precision casting method is needed to produce a stainless steel water meter, so as to solve the technical problem of low casting yield in the precision casting process.
Disclosure of Invention
In order to solve the technical problem, the invention provides a method for manufacturing a precision casting stainless steel water meter. Which comprises the following steps:
A) manufacturing a wax mould, wherein the wax mould comprises a wax mould framework extending in the vertical direction and a wax piece arranged on the wax mould framework, the wax mould framework comprises a horizontal part extending horizontally, a mould head extending outwards from the horizontal part, and at least one vertical part extending from the horizontal part to the vertical direction, the wax element comprises a body part, a water inlet part extending outwards from the body part, and a water outlet part extending outwards from the body part, the wax piece is connected with one side surface of the vertical part in a mode that the water outlet part faces upwards and the water inlet part faces downwards, the wax piece is provided with a first guide injection pin connected between the vertical part and the water inlet part, a second guide injection pin connected between the body part and the vertical part, and a third guide injection pin connected between the water outlet part and the vertical part, the first guide pin, the second guide pin, and the third guide pin are arranged in a vertical direction and extend in a substantially horizontal direction;
B) attaching slurry and sand to the outer layer of the wax mould to prepare a pouring film layer;
C) dewaxing the wax mould attached with the pouring film layer to obtain a film shell;
D) baking the membrane shell;
E) and injecting stainless steel water into the membrane shell, cooling and forming, and removing the membrane shell to obtain a stainless steel product.
Further, the manufacture of the wax mould comprises the following steps:
a) providing a first mold for casting and molding the wax piece in one step and a second mold for casting the wax mold framework;
b) injecting wax into the first mold and the second mold to obtain the wax piece and the wax mold framework;
c) and welding one ends of the first guide injection leg, the second guide injection leg and the third guide injection leg of the wax piece, which are far away from the body part, on the vertical part of the wax mould framework to form the wax mould.
Further, the method further comprises the following steps:
d) blowing the wax mould by using an air gun, removing wax scraps, then soaking in a degreasing agent, removing grease, soaking in clear water and then air-drying.
Further, the temperature of the shooting wax is between 52 ℃ and 58 ℃ for 15 seconds to 30 seconds.
Further, the wax mould framework comprises two vertical parts, and the two vertical parts are arranged in parallel at intervals along the same side of the horizontal part.
Furthermore, two opposite sides of each vertical portion are respectively connected with one wax piece, and the two wax pieces connected to the same vertical portion are symmetrically distributed.
Further, the body portion includes an opening and a bottom portion opposite to the opening, and the second guide pin is located between the opening and the bottom portion.
Furthermore, the number of the second guide pins is two, and the two second guide pins are respectively arranged at the edges of the two opposite sides of the bottom, which are close to the round angle position.
Further, the first guide pin and the third guide pin are respectively arranged at the farthest end edges of the water inlet part and the water outlet part of the wax piece.
Further, the wax piece comprises a non-return part arranged on one side of the water outlet part, and the non-return part is arranged close to the die head.
By reasonably setting the relative positions and the combination number of the wax pieces and the framework in the wax mould and the position of the guide pins, the invention improves the problem of low casting yield caused by unqualified wax mould setting and treatment in the integral molding casting process of the stainless steel water meter shell.
Drawings
FIG. 1 is a schematic view of a wax pattern in accordance with an embodiment of the present invention.
Fig. 2 is a schematic view of another perspective of a wax pattern in accordance with an embodiment of the present invention.
FIG. 3 is a schematic view of a wax pattern skeleton according to an embodiment of the present invention.
FIG. 4 is a schematic view of a wax member in accordance with an embodiment of the invention.
Detailed Description
The invention relates to a water meter manufacturing method, which comprises the following steps:
the first step is as follows: a first mould assembly for manufacturing a wax part and a second mould assembly for manufacturing a framework, wherein wax materials (the main components of the wax materials are paraffin wax components) are heated to 52-58 ℃ in a wax injection device, and wax is injected into the first mould assembly and the second mould assembly for 15-30 seconds;
removing the wax piece and the framework from the first mold assembly and the second mold assembly, and soaking the wax piece and the framework in water until the wax piece and the framework are completely cooled to obtain a wax piece 1 and a wax mold framework 2;
the second step is that: the wax member 1 is heat-welded to the wax pattern frame 2 to obtain the wax pattern 100. Referring to fig. 1 to 3, a wax pattern 100 is illustrated for the purpose of illustration and not limitation, the wax pattern framework 2 includes a horizontal portion 21 extending horizontally, a die head 22 extending perpendicularly outward from one side of the horizontal portion, and at least one vertical portion 23 extending in a vertical direction from one end of the horizontal portion, but not limited thereto, in the preferred embodiment, two vertical portions 23 are disposed opposite to each other at a certain interval, and the two vertical portions 23 are disposed in parallel and spaced along the same side of the horizontal portion 21. Two opposite sides of each vertical portion 23 are respectively connected with one wax piece 1, and the two wax pieces 1 connected to the same vertical portion 23 are symmetrically distributed. The die 22 is substantially conical and has a smaller cross section near the horizontal portion 21, and the outer peripheral surface of the die 22 is a curved surface.
The wax member 1 includes a body 12, a water inlet 11 extending outward from the body 12, a water outlet 13 extending outward from the body 12, and a non-return portion 14 provided on one side of the water outlet 13. The body portion 12 includes an opening 122 and a bottom portion 123 opposite the opening. The bottom 123 of the body 12 is provided with a second guide pin 121 toward the vertical portion 23, one side of the water inlet 11 is provided with a first guide pin 111 toward the vertical portion 23, and one side of the water outlet 13 is provided with a third guide pin 131 toward the vertical portion 23. The symmetry axes of the first guide pin 111, the second guide pin 121 and the third guide pin 131 are arranged in parallel and spaced from each other. The wax piece 1 is arranged on one side surface of the vertical part 23 in a way that the water outlet part 13 faces upwards and the water inlet part 11 faces downwards, and the wax piece 1 and the vertical part 23 are arranged in a way that one ends of the first guide pin 111, the second guide pin 121 and the third guide pin 131 of the wax piece 1, which are far away from the body part 12, are welded on the vertical part 23 in a hot welding mode. In other embodiments, the number of the first, second and third guide pins may be increased according to the circumstances, but the increase of the guide pins increases the casting cost, so that in the most preferred embodiment, the number of the second guide pins 121 is two, and two second guide pins 121 are respectively disposed at the edges of two opposite sides of the bottom 123 adjacent to the rounded corner, and the first guide pin 111 and the third guide pin 113 are respectively disposed at the farthest edges of the water inlet 11 and the water outlet 13 of the wax member 1. The arrangement mode of the first guide injection pin, the second guide injection pin and the third guide injection pin can distribute the positions of the pouring channels of the stainless steel water as uniformly as possible, and can ensure the synchronism of the pouring and cooling time of the stainless steel water and the uniformity of the stainless steel water flowing into each pouring channel while considering the optimal cost. The first and third guide pins are of a long structure with a cross section area at one end far away from the wax piece 1 larger than that at one end close to the wax piece 1, so that the stainless steel water can enter the casting mould more quickly. The second guide pin 121 has a rectangular elongated structure with a uniform cross section. In the present embodiment, without limitation, the two wax elements 1 are symmetrically distributed on both sides of the vertical portion 23. Without limitation, in this embodiment, the second guide pin 121 extends between the bottom 123 and the upright 23. Without limitation, in other embodiments, the second guide pin 121 extends between the upright 23 and a location between the bottom 123 and the opening 122.
The third step: blowing the wax mold 100 by an air gun to remove wax chips, then soaking in an oil removal agent to remove oil, soaking in clear water, and then air-drying.
The fourth step: and infiltrating slurry and sand materials on the outer layer of the wax mould 100 to form a casting film layer, after the casting film layer is aired, putting the wax mould 100 into a wax melting furnace, heating to melt, and flowing out of a mould head to obtain the mould shell.
The fifth step: and placing the mould shell into a roasting furnace for roasting and heating, and then pouring molten steel into the mould shell to form a casting.
And a sixth step: and after the casting is naturally cooled, removing the mould shell and the casting mould head to obtain a casting rough part for subsequent finish machining.
In the invention, the wax pieces are arranged on the wax mould framework in the vertical direction, and the non-return part 14 is arranged close to the mould head 22, so that when the stainless steel water is poured, more metal water outlet parts 13 are needed to be poured and filled finally, which is beneficial to improving the yield of the stainless steel metal poured water meter shell. In the process of pouring the molten steel, the molten steel in the vertical direction can flow rapidly under the action of gravity due to poor flowability of the molten steel, and the vertically-arranged guide pins extending between the wax piece and the framework can rapidly diffuse the molten steel to each part of a casting product, so that the uniformity of each part of the product is improved.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
The above description is only a part of the embodiments of the present invention, and not all embodiments, and any equivalent variations of the technical solutions of the present invention, which are made by those skilled in the art through reading the present specification, are covered by the claims of the present invention.
Claims (10)
1. A method for manufacturing an integrally formed stainless steel water meter shell comprises the following steps:
A) manufacturing a wax mould, wherein the wax mould comprises a wax mould framework extending in the vertical direction and a wax piece arranged on the wax mould framework, the wax mould framework comprises a horizontal part extending horizontally, a mould head extending outwards from the horizontal part, and at least one vertical part extending from the horizontal part to the vertical direction, the wax element comprises a body part, a water inlet part extending outwards from the body part, and a water outlet part extending outwards from the body part, the wax piece is connected with one side surface of the vertical part in a mode that the water outlet part faces upwards and the water inlet part faces downwards, the wax piece is provided with a first guide injection pin connected between the vertical part and the water inlet part, a second guide injection pin connected between the body part and the vertical part, and a third guide injection pin connected between the water outlet part and the vertical part, the first guide pin, the second guide pin, and the third guide pin are arranged in a vertical direction and extend in a substantially horizontal direction;
B) attaching slurry and sand to the outer layer of the wax mould to prepare a pouring film layer;
C) dewaxing the wax mould attached with the pouring film layer to obtain a film shell;
D) baking the membrane shell;
E) and injecting stainless steel water into the membrane shell, cooling and forming, and removing the membrane shell to obtain a stainless steel product.
2. The method of manufacturing an integrally formed stainless steel wristwatch case of claim 1, wherein: the manufacture of the wax mould comprises the following steps:
a) providing a first mold for casting and molding the wax piece in one step and a second mold for casting the wax mold framework;
b) injecting wax into the first mold and the second mold to obtain the wax piece and the wax mold framework;
c) and welding one ends of the first guide injection leg, the second guide injection leg and the third guide injection leg of the wax piece, which are far away from the body part, on the vertical part of the wax mould framework to form the wax mould.
3. The method of manufacturing an integrally formed stainless steel wristwatch case of claim 2, wherein: further comprising the steps of:
d) blowing the wax mould by using an air gun, removing wax scraps, then soaking in a degreasing agent, removing grease, soaking in clear water and then air-drying.
4. The method of manufacturing an integrally formed stainless steel wristwatch case of claim 2, wherein: the temperature of the wax injection is between 52 ℃ and 58 ℃ for 15 seconds to 30 seconds.
5. The method of manufacturing an integrally formed stainless steel wristwatch case of claim 1, wherein: the wax matrix skeleton includes two vertical portions, two vertical portion is followed same one side interval and the parallel arrangement of horizontal part.
6. The method of manufacturing an integrally formed stainless steel wristwatch case of claim 4, wherein: the two opposite sides of each vertical portion are respectively connected with one wax piece, and the two wax pieces connected to the same vertical portion are symmetrically distributed.
7. The method of manufacturing an integrally formed stainless steel water meter case according to claim 1, wherein: the body part comprises an opening and a bottom part opposite to the opening, and the second guide injection pin is positioned between the opening and the bottom part.
8. The method of manufacturing an integrally formed stainless steel wristwatch case of claim 1, wherein: the number of the second guide injection pins is two, and the two second guide injection pins are respectively arranged at the edges of the two opposite sides of the bottom, which are close to the round corner positions.
9. The method of manufacturing an integrally formed stainless steel wristwatch case of claim 1, wherein: the first guide pin and the third guide pin are respectively arranged at the farthest end edges of the water inlet part and the water outlet part of the wax piece.
10. The method of manufacturing an integrally formed stainless steel wristwatch case of claim 1, wherein: the wax piece comprises a non-return part arranged on one side of the water outlet part, and the non-return part is close to the die head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011296524.1A CN114515819A (en) | 2020-11-18 | 2020-11-18 | Method for manufacturing integrally formed stainless steel water meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011296524.1A CN114515819A (en) | 2020-11-18 | 2020-11-18 | Method for manufacturing integrally formed stainless steel water meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114515819A true CN114515819A (en) | 2022-05-20 |
Family
ID=81594424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011296524.1A Pending CN114515819A (en) | 2020-11-18 | 2020-11-18 | Method for manufacturing integrally formed stainless steel water meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114515819A (en) |
-
2020
- 2020-11-18 CN CN202011296524.1A patent/CN114515819A/en active Pending
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