CN115213368A - Die-casting method for anti-fatigue handle - Google Patents
Die-casting method for anti-fatigue handle Download PDFInfo
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- CN115213368A CN115213368A CN202210885323.8A CN202210885323A CN115213368A CN 115213368 A CN115213368 A CN 115213368A CN 202210885323 A CN202210885323 A CN 202210885323A CN 115213368 A CN115213368 A CN 115213368A
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- Prior art keywords
- die
- fatigue
- casting
- aluminum alloy
- molten metal
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- 238000004512 die casting Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 34
- 230000002929 anti-fatigue Effects 0.000 title claims abstract description 9
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 29
- 229910052751 metal Inorganic materials 0.000 claims abstract description 27
- 239000002184 metal Substances 0.000 claims abstract description 27
- 239000002994 raw material Substances 0.000 claims abstract description 25
- 238000010438 heat treatment Methods 0.000 claims abstract description 19
- 239000011261 inert gas Substances 0.000 claims abstract description 16
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 12
- 238000003756 stirring Methods 0.000 claims abstract description 8
- 238000002844 melting Methods 0.000 claims abstract description 6
- 230000008018 melting Effects 0.000 claims abstract description 6
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 4
- 239000000956 alloy Substances 0.000 claims abstract description 4
- 238000001816 cooling Methods 0.000 claims description 15
- 239000007789 gas Substances 0.000 claims description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 229910002804 graphite Inorganic materials 0.000 claims description 7
- 239000010439 graphite Substances 0.000 claims description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 238000000137 annealing Methods 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 4
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 abstract description 4
- 239000002893 slag Substances 0.000 abstract description 2
- 238000005266 casting Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012805 post-processing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 239000006082 mold release agent Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/2015—Means for forcing the molten metal into the die
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention discloses a die-casting method of an anti-fatigue handle, which relates to the field of hardware processing and comprises the following steps: the method comprises the following steps: melting, namely heating the aluminum alloy raw material to 760 ℃, and introducing mixed inert gas for protection so as to liquefy the alloy raw material to form molten metal; step two: the aluminum alloy molten metal is heated to 800 ℃ again, the slag removing agent is added for stirring, and scum on the surface of the aluminum alloy molten metal is removed completely.
Description
Technical Field
The invention relates to the field of hardware processing, in particular to a die-casting method for an anti-fatigue handle.
Background
With the continuous development of science and technology, the door handle is the most common in life, the service life of the handle is high, the production and processing processes of the handle are mostly carried out in a die-casting mode, the existing die-casting process method is characterized in that impurities and gases contained in die-casting raw materials of the handle are too much, the handle is die-cast, air holes exist, the anti-fatigue strength is greatly reduced, the gases in the raw materials are difficult to remove to the maximum in some existing processes, and meanwhile, the gases in the raw materials react with the raw materials in the heating process due to the multi-purpose one-time heating mode, so that the die-casting quality of the handle is further reduced.
Disclosure of Invention
The invention aims to provide a die-casting method of an anti-fatigue handle, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the die-casting method of the anti-fatigue handle comprises the following steps:
the method comprises the following steps: melting, namely heating the aluminum alloy raw material to 760 ℃, and introducing mixed inert gas for protection so as to liquefy the alloy raw material to form molten metal;
step two: heating the aluminum alloy molten metal to 800 ℃ again, adding a deslagging agent for stirring, and removing the scum on the surface of the aluminum alloy molten metal;
step three: cooling the aluminum alloy molten metal from which the dross is removed to 710 ℃, standing for fifteen minutes at constant temperature, measuring the gas content in the aluminum alloy molten metal, and controlling the gas content to be less than or equal to 0.3ML/100g;
step four: cleaning the die-casting die, removing impurities in the inner cavity, and spraying a release agent in the inner cavity;
step five: closing the two molds, injecting mixed inert gas into the two molds when the distance between the closing surfaces of the two molds is one centimeter, and then completely closing the molds;
step six: preheating a mold for closing the mold to reach a set heat balance temperature;
step seven: performing die casting, namely injecting the molten metal in the third step into a die cavity, and introducing high-pressure mixed inert gas to pressurize the die cavity so as to fill the die cavity with the molten metal;
step eight: cooling and opening the die, taking out the die casting and carrying out post-treatment on the die casting.
Preferably, the mixed inert gas in the step is nitrogen and argon, and the mixing ratio is 3
Preferably, the method for heating the aluminum alloy raw material in the first step is set as step-type heating, the aluminum alloy raw material is heated to 300 ℃, kept at a constant temperature for five minutes, then heated to 660 ℃, kept at a constant temperature for five minutes, then stirred by using a graphite rod for ten minutes, finally heated to 760 ℃, and kept still, and then stirred by using the graphite rod again, so that internal gas is removed to the maximum extent, and meanwhile, the step-type heating can effectively avoid the aluminum alloy raw material from reacting with the internal gas in the heating process, so that the overall quality is reduced.
Preferably, in the second step, the dosage of the deslagging agent is 0.7 percent of the aluminum alloy molten metal raw material, and the stirring time is fifteen minutes.
Preferably, in the fourth step, 15% of graphite powder is mixed in the mold release agent.
Preferably, the mixed inert gas pressure in the seventh step is 0.35MPa and lasts for ten minutes.
Preferably, the system pressure of the die casting in the seventh step is controlled at 18Mpa, and the die casting temperature is controlled at 690 ℃.
Preferably, the step eight middle and later period processing comprises flash removal, casting head annealing treatment and cooling, and the cooling adopts air natural cooling.
Preferably, the annealing treatment is carried out at a temperature of up to 300 ℃ and a temperature of up to 150 ℃ per hour, and then the temperature is maintained for eight hours.
In conclusion, the invention has the beneficial effects that:
the invention adopts the step-type temperature rise during the melting process, simultaneously stands at each stage, and repeatedly uses the graphite rod for stirring after melting, thereby removing the gas in the melting raw material to the maximum extent, avoiding the occurrence of pores in the die-casting handle to reduce the fatigue resistance of the handle, effectively avoiding the raw material from reacting with the internal gas in the temperature rise process, greatly improving the die-casting quality and greatly prolonging the service life of the handle.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a schematic view of a flow frame structure of an anti-fatigue handle die-casting method according to the present invention;
fig. 2 is a schematic diagram of a post-processing flow frame of the die-casting method for the fatigue-resistant handle according to the invention.
Detailed Description
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
The present invention is described in detail below with reference to fig. 1-2.
Referring to fig. 1-2, an embodiment of the present invention is shown: a die-casting method for a fatigue-resistant handle comprises the following steps:
the method comprises the following steps: melting, namely heating the aluminum alloy raw material to 760 ℃, and introducing mixed inert gas for protection so as to liquefy the alloy raw material to form molten metal;
step two: heating the aluminum alloy molten metal to 800 ℃ again, adding a deslagging agent for stirring, and removing the scum on the surface of the aluminum alloy molten metal;
step three: cooling the aluminum alloy molten metal from which the dross is removed to 710 ℃, standing for fifteen minutes at constant temperature, measuring the gas content in the aluminum alloy molten metal, and controlling the gas content to be less than or equal to 0.3ML/100g;
step four: cleaning the die-casting die, removing impurities in the inner cavity, and spraying a release agent in the inner cavity;
step five: closing the two molds, injecting mixed inert gas into the two molds when the distance between the closing surfaces of the two molds is one centimeter, and then completely closing the molds;
step six: preheating a mold for closing the mold to reach a set heat balance temperature;
step seven: performing die casting, namely injecting the molten metal in the third step into a die cavity, and introducing high-pressure mixed inert gas to pressurize the die cavity so as to fill the die cavity with the molten metal;
step eight: and cooling, opening the die, taking out the die casting and carrying out post-treatment on the die casting.
In addition, in one embodiment, the mixed inert gas in the step is nitrogen and argon, and the mixing ratio is 3.
In addition, in one embodiment, the method for heating the aluminum alloy raw material in the first step is configured as step-type heating, the aluminum alloy raw material is heated to 300 ℃, kept at a constant temperature for five minutes, then heated to 660 ℃, kept at a constant temperature for five minutes, then stirred for ten minutes by using a graphite rod, finally heated to 760 ℃, and stirred again by using the graphite rod after being kept, so that internal gas is removed to the maximum extent, and meanwhile, the step-type heating can effectively prevent the aluminum alloy raw material from reacting with the internal gas in the heating process, so that the overall quality is reduced.
In addition, in one embodiment, the amount of the slag removing agent in the second step is 0.7% of that of the aluminum alloy molten metal raw material, and the stirring time is fifteen minutes.
In addition, in one embodiment, the release agent in the fourth step is mixed with 15% of graphite powder.
In addition, in one embodiment, the mixed inert gas pressure in the seventh step is 0.35MPa and lasts for ten minutes.
In addition, in one embodiment, the system pressure of the die casting in the seventh step is controlled to be 16-20Mpa, and the die casting temperature is controlled to be 680-700 ℃.
In addition, in one embodiment, the step eight intermediate and post-processing comprises flash removal, casting head annealing treatment and cooling, wherein the cooling adopts natural air cooling.
In addition, in one embodiment, the annealing treatment is carried out at a temperature of 150 ℃ per hour after being heated to 300 ℃, and the constant temperature is kept for eight hours.
The above description is only an embodiment of the invention, but the scope of the invention is not limited thereto, and any changes or substitutions that are not thought of through the inventive work should be included in the scope of the invention. Therefore, the protection scope of the invention should be subject to the protection scope defined by the claims.
Claims (9)
1. A die-casting method for an anti-fatigue handle is characterized by comprising the following steps: the method comprises the following steps:
the method comprises the following steps: melting, namely heating the aluminum alloy raw material to 760 ℃, and introducing mixed inert gas for protection so as to liquefy the alloy raw material to form molten metal;
step two: heating the aluminum alloy molten metal to 800 ℃ again, adding a deslagging agent for stirring, and removing the scum on the surface of the aluminum alloy molten metal;
step three: cooling the aluminum alloy molten metal from which the dross is removed to 710 ℃, standing for fifteen minutes at constant temperature, measuring the gas content in the aluminum alloy molten metal, and controlling the gas content to be less than or equal to 0.3ML/100g;
step four: cleaning the die-casting die, removing impurities in the inner cavity, and spraying a release agent in the inner cavity;
step five: closing the two dies, injecting mixed inert gas into the two dies when the gap between the closing surfaces of the two dies is one centimeter, and completely closing the dies;
step six: preheating a mold for closing the mold to reach a set heat balance temperature;
step seven: performing die casting, namely injecting the molten metal in the third step into a die cavity, and introducing high-pressure mixed inert gas to pressurize the die cavity so as to fill the die cavity with the molten metal;
step eight: and cooling, opening the die, taking out the die casting and carrying out post-treatment on the die casting.
2. The die-casting method for the fatigue-resistant handle according to claim 1, characterized in that: the mixed inert gas in the step is nitrogen and argon, and the mixing ratio is 3.
3. The die-casting method for the fatigue-resisting pull handle according to claim 1, characterized in that: the method for heating the aluminum alloy raw material in the first step is designed to be step-type heating, the aluminum alloy raw material is heated to 300 ℃, kept stand for five minutes at a constant temperature, heated to 660 ℃, kept stand for five minutes at a constant temperature, stirred for ten minutes by using a graphite rod, finally heated to 760 ℃, and stirred by using the graphite rod again after being kept stand.
4. The die-casting method for the fatigue-resistant handle according to claim 1, characterized in that: in the second step, the dosage of the deslagging agent is 0.7 percent of the aluminum alloy molten metal raw material, and the stirring time is fifteen minutes.
5. The die-casting method for the fatigue-resistant handle according to claim 1, characterized in that: and 15% of graphite powder is mixed in the release agent in the fourth step.
6. The die-casting method for the fatigue-resistant handle according to claim 1, characterized in that: and in the seventh step, the pressure of the mixed inert gas is 0.35MPa and lasts for ten minutes.
7. The die-casting method for the fatigue-resisting pull handle according to claim 1, characterized in that: and seventhly, controlling the pressure of the die-casting system to be 16-20Mpa and the die-casting temperature to be 680-700 ℃.
8. The die-casting method for the fatigue-resisting pull handle according to claim 1, characterized in that: and step eight, performing middle and later stage treatment, namely removing flash, performing annealing treatment on the pouring head, and cooling, wherein air natural cooling is adopted for cooling.
9. The die-casting method for the fatigue-resistant handle according to claim 8, wherein the die-casting method comprises the following steps: the annealing treatment is carried out, the temperature is increased to 300 ℃, the temperature is increased to 150 ℃ per hour, and then the constant temperature is kept for eight hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210885323.8A CN115213368A (en) | 2022-07-26 | 2022-07-26 | Die-casting method for anti-fatigue handle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210885323.8A CN115213368A (en) | 2022-07-26 | 2022-07-26 | Die-casting method for anti-fatigue handle |
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| Publication Number | Publication Date |
|---|---|
| CN115213368A true CN115213368A (en) | 2022-10-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210885323.8A Pending CN115213368A (en) | 2022-07-26 | 2022-07-26 | Die-casting method for anti-fatigue handle |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105215314A (en) * | 2015-09-18 | 2016-01-06 | 霍山县龙鑫金属制品有限公司 | A kind of auto parts machinery pressure casting method |
| WO2017041203A1 (en) * | 2015-09-07 | 2017-03-16 | 苏州凯宥电子科技有限公司 | Die-cast aluminium alloy and preparation method therefor |
| CN110756761A (en) * | 2019-11-04 | 2020-02-07 | 丽水市建川五金制造有限公司 | Die casting method of door handle |
| CN211758378U (en) * | 2020-01-09 | 2020-10-27 | 河北伟新锻造有限公司 | Knuckle mould capable of reducing burrs |
| CN113462938A (en) * | 2021-07-16 | 2021-10-01 | 合肥工业大学 | Preparation method of high-strength gradient microalloyed aluminum alloy material |
-
2022
- 2022-07-26 CN CN202210885323.8A patent/CN115213368A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017041203A1 (en) * | 2015-09-07 | 2017-03-16 | 苏州凯宥电子科技有限公司 | Die-cast aluminium alloy and preparation method therefor |
| CN105215314A (en) * | 2015-09-18 | 2016-01-06 | 霍山县龙鑫金属制品有限公司 | A kind of auto parts machinery pressure casting method |
| CN110756761A (en) * | 2019-11-04 | 2020-02-07 | 丽水市建川五金制造有限公司 | Die casting method of door handle |
| CN211758378U (en) * | 2020-01-09 | 2020-10-27 | 河北伟新锻造有限公司 | Knuckle mould capable of reducing burrs |
| CN113462938A (en) * | 2021-07-16 | 2021-10-01 | 合肥工业大学 | Preparation method of high-strength gradient microalloyed aluminum alloy material |
Non-Patent Citations (1)
| Title |
|---|
| 张磊: "《铸造合金及其熔炼》", 华中科技大学出版社, pages: 121 - 122 * |
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