CN112246950B - One-step forming process for hot stamping process of aluminum alloy seal head - Google Patents
One-step forming process for hot stamping process of aluminum alloy seal head Download PDFInfo
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- CN112246950B CN112246950B CN202011084267.5A CN202011084267A CN112246950B CN 112246950 B CN112246950 B CN 112246950B CN 202011084267 A CN202011084267 A CN 202011084267A CN 112246950 B CN112246950 B CN 112246950B
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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
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/20—Deep-drawing
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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
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/20—Deep-drawing
- B21D22/208—Deep-drawing by heating the blank or deep-drawing associated with heat treatment
-
- 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
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/16—Heating or cooling
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention discloses an aluminum alloy seal head hot stamping procedure one-step forming process, which comprises the following steps: sequentially carrying out four pre-pressing procedures of one pre-pressing, two pre-pressing, three pre-pressing and four pre-pressing; molding: feeding the pre-pressed base material into a heating furnace, heating to 500 +/-5 ℃, cooling to 160 +/-2 ℃ in the furnace, taking out, placing on a lower die, descending a blank pressing frame to tightly press the edge of the base material, pressing the base material downwards by an upper die to completely stretch the base material into the lower die, completely attaching the outer diameter of the base material to the inner diameter of the lower die, and stamping the base material at 130-135 ℃; demolding: and lifting the upper die to leave the base metal, and ejecting the base metal by the lower ejection cylinder to obtain a finished product. The invention does not need to be molded for many times and then put on a spinning machine to draw a straight edge, and has the main effects of simplifying the molding process, molding in a press, shortening the process flow and saving the time.
Description
Technical Field
The invention relates to the technical field of aluminum alloy end socket processing, in particular to a one-step forming process of an aluminum alloy end socket hot stamping procedure.
Background
Aluminum alloy is rarely used in the pressure container industry as a pressure container material, and in view of less use in the special pressure container industry and small market scale, and simultaneously, because of harsh forming conditions, complex forming process, low forming reliability and low yield, technical research on the aluminum alloy is less under various factor conditions, but due to market demands of external condition and environmental factors, a one-step forming process of the aluminum alloy end socket is urgently needed to be researched and solved.
Disclosure of Invention
The invention aims to provide a one-step forming process of an aluminum alloy seal head hot stamping procedure, which is suitable for forming processes of aluminum seal heads of any size, does not need to be formed for many times and then put on a spinning machine to draw straight edges, and has the main effects of simplifying the forming process, forming in a press, shortening the process flow and saving time.
In order to achieve the purpose, the invention adopts the technical scheme that: an one-step forming process of an aluminum alloy seal head hot stamping procedure comprises the following steps,
s1) prepressing: the method comprises four pre-pressing procedures including one pre-pressing, two pre-pressing, three pre-pressing and four pre-pressing which are sequentially carried out, wherein the first pre-pressing, the second pre-pressing, the three pre-pressing and the four pre-pressing all send the base metal into a heating furnace to be heated to 500 +/-5 ℃, the base metal is taken out after the temperature in the furnace is slowly reduced and is placed on a lower die, a blank pressing frame descends to press the edge part of the base metal, and the upper die presses the base metal to realize the pre-pressing;
s2) molding: feeding the pre-pressed base metal into a heating furnace, heating to 500 +/-5 ℃, slowly cooling to 160 +/-2 ℃ in the furnace, taking out the base metal, placing the base metal on a lower die, descending a blank pressing frame to tightly press the edge of the base metal, pressing the base metal by an upper die to completely stretch the base metal into the lower die, completely attaching the outer diameter of the base metal to the inner diameter of the lower die, and stamping the base metal at the temperature of 130-135 ℃;
s3) demolding: and (4) lifting the upper die to leave the base metal, reducing the temperature of the base metal to 45 +/-2 ℃, and ejecting the base metal by using the lower ejection cylinder to obtain a finished product.
As further optimization, the pre-pressing temperature of the parent metal of one pre-pressing procedure in S1 is 135-140 ℃; the temperature after pre-pressing is 70 +/-2 ℃.
As further optimization, the pre-pressing temperature of the parent metal of the second pre-pressing procedure in S1 is 160-165 ℃; the temperature after pre-pressing is 75 +/-2 ℃.
As further optimization, the pre-pressing temperature of the parent metal of the three pre-pressing procedures in S1 is 190-; the temperature after pre-pressing is 100 +/-2 ℃.
As further optimization, the pre-pressing temperature of the parent metal of the four pre-pressing procedures in S1 is 165-170 ℃; the temperature after pre-pressing is 105 +/-2 ℃.
As a further optimization, the pressing frame is pressed downward in S1 and/or S2 for flattening wrinkles or waviness of the edge of the base material.
As a further optimization, the height of the base material after the first pre-pressing step in S1 is 1/4, the height of the base material after the second pre-pressing step is 2/4, and the height of the base material after the third pre-pressing step is 3/4.
As a further optimization, the upper die is a flat die.
As a further optimization, the heating furnace is a liquefied gas furnace.
Compared with the prior art, the invention has the following beneficial effects:
the convex part of the end socket is formed and processed by single-mold multi-time hot stamping, a pre-customized mold is fixed by a stamping machine in a forming mode, the aluminum base material is subjected to multi-time hot stamping in a segmented mode until the whole end socket is formed, the straight edge part of the end socket is formed in one step in a hot stamping process, and the straight edge part does not need to be formed by a spinning means. The one-step forming process of the aluminum alloy end socket does not need to go up a spinning machine after multiple forming and then draw a straight edge, is suitable for forming processes of aluminum end sockets of any size, and mainly has the advantages of simplifying the forming process, forming in the pressing machine, shortening the process flow and saving time.
Detailed Description
The following are specific examples of the present invention and further describe the technical solutions of the present invention, but the present invention is not limited to these examples.
The method comprises the steps of feeding a mother material to be formed into a heating furnace, heating to about 500 ℃, wherein the heating furnace can be a liquefied gas furnace, slowly cooling the mother material in the furnace, and aiming at eliminating front section processing stress, reducing the temperature in the furnace to about 200 ℃, placing the mother material on a lower die of a press after being discharged, then lowering and pressurizing a pressing frame to keep a pressing state, slowly pressing an upper die on the mother material, selecting a flat die for the upper die, controlling the pressing-in speed, wherein the temperature of one-step prepressing forming is about 135 plus 140 ℃, the temperature of one-step forming is reduced to about 70 ℃, stopping prepressing action after one-step forming, ejecting the mother material, heating to about 500 ℃ in the furnace again, preparing secondary prepressing, wherein the lower die is always unchanged, the inner diameter of the lower die is 2000mm, the pressing-in height of the mother material after one-step of prepressing is about 1/4 of the height of a finished product, the diameter of the lower die is about 1600mm, the prepressing temperature is 139 ℃, after completing one pre-pressing, 71 ℃.
Preheating the parent metal in a furnace at 500 ℃, then preparing two pre-pressing steps, wherein the step of one pre-pressing step is carried out, when the forming temperature reaches the required forming temperature, immediately unfolding the two pre-pressing steps, the temperature of the two pre-pressing steps is about 165 ℃, the actual laser measurement temperature is 164 ℃, the pressing depth reaches 2/4 of the height of the finished product, the diameter is about 1700mm after the pre-pressing is finished, and the temperature of the parent metal after the two pre-pressing steps is 75 ℃.
After the second prepressing is finished, the base material is sent into the furnace again and heated to about 500 ℃, the processing stress of the previous prepressing is removed, the temperature of the base material when the base material is discharged is about 250 ℃, the base material is immediately taken out and placed on a lower die, the temperature of the three prepressing is slightly higher than the temperature of the first prepressing and the second prepressing, a press is started when the temperature is reduced to about 190 ℃, at the moment, if wrinkles or waves occur on the edge of the base material, the edge pressing action is started to flatten the periphery of the base material, the edge pressing action is in a pressurizing state, an upper die is slowly lowered to lead the base material to reach about 3/4 of the height of a finished product, the temperature after forming is about 100 ℃, a measuring tape is used for measuring the maximum diameter of the concave diameter to be about 1800mm, at the moment, the base material is sent into the furnace again and heated to eliminate the processing stress remained in the previous working procedure, and preparation is made for the four prepressing working procedures.
The four pre-pressing processes are carried out for three pre-pressing procedures, the materials are sent into a furnace and heated to about 500 ℃ to eliminate stress, then the temperature of the base material is slowly reduced to 167 ℃, the base material is placed above a lower die after being taken out of the furnace, if the edge of the base material is wavy or wrinkled, the base material is flattened by a pressing frame and then pressurized, the pressing frame is statically placed on the edge of the base material, an upper die is then extended downwards to draw the base material, after the four pre-pressing processes are extended, the diameter of a notch formed by the base material is about 1900mm, the temperature of the base material is about 103 ℃ after the four pre-pressing processes are completed, and then the materials are fed into the furnace and heated to about 500 ℃.
The prepressing temperature of the final forming process is 135 ℃, when the base material is taken out from a furnace and placed on a lower die, the temperature is about 160 ℃, when the temperature of the base material is reduced to about 135 ℃, a pressing frame firstly descends to contact the edge of the base material to be pressurized to be in a static pressure state, then the lower die descends to stretch the base material to the lower die, the outer diameter of the base material is completely attached to the inner diameter of the lower die, the end surface of the formed aluminum end socket is slightly lower than the end surface of the lower die, then the lower die ascends to leave the base material, the base material is fixed in the lower die, a lower ejection cylinder ejects the base material out of the lower die when the temperature of the base material is reduced to about 46 ℃, a finished product is taken out immediately, and after the base material with the original thickness of 14mm is subjected to a plurality of heating and stretching processes, the thickness of the formed end socket is 8mm, and the diameter is 2000 mm.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (9)
1. An one-step forming process of an aluminum alloy seal head hot stamping procedure is characterized by comprising the following steps of,
s1) prepressing: the method comprises four pre-pressing procedures including one pre-pressing, two pre-pressing, three pre-pressing and four pre-pressing which are sequentially carried out, wherein the first pre-pressing, the second pre-pressing, the three pre-pressing and the four pre-pressing all send the base metal into a heating furnace to be heated to 500 +/-5 ℃, the base metal is taken out after the temperature in the furnace is slowly reduced and is placed on a lower die, a blank pressing frame descends to press the edge part of the base metal, and the upper die presses the base metal to realize the pre-pressing;
s2) molding: feeding the pre-pressed base material into a heating furnace, heating to 500 +/-5 ℃, slowly cooling to 160 +/-2 ℃ in the furnace, taking out, placing on a lower die, descending a blank holder frame to tightly press the edge of the base material, pressing the base material by an upper die to completely stretch the base material into the lower die, completely attaching the outer diameter of the base material to the inner diameter of the lower die, and setting the stamping temperature of the base material to 130-135 ℃;
s3) demolding: and (4) lifting the upper die away from the base metal, reducing the temperature of the base metal to 45 +/-2 ℃, and ejecting the base metal out of the lower ejection cylinder to obtain a finished product.
2. The one-step forming process of the aluminum alloy end socket hot stamping procedure as recited in claim 1, wherein the pre-pressing temperature of the base material of one pre-pressing procedure in S1 is 135-140 ℃; the temperature after pre-pressing is 70 +/-2 ℃.
3. The one-step forming process of the aluminum alloy end socket hot stamping procedure as recited in claim 1, wherein the pre-pressing temperature of the base material of the second pre-pressing procedure in S1 is 160-165 ℃; the temperature after pre-pressing is 75 +/-2 ℃.
4. The one-step forming process of the aluminum alloy seal head hot stamping procedure as recited in claim 1, wherein the pre-pressing temperature of the base material of the three pre-pressing procedures in S1 is 190-; the temperature after pre-pressing is 100 +/-2 ℃.
5. The one-step forming process for the aluminum alloy seal head hot stamping procedure as claimed in claim 1, wherein the base material pre-pressing temperature of the four pre-pressing procedures in S1 is 165-170 ℃; the temperature after pre-pressing is 105 +/-2 ℃.
6. An aluminum alloy head hot stamping process one-step forming process as claimed in claim 1, wherein the pressing frame in S1 and/or S2 presses downwards for flattening the base material edge wrinkles.
7. The aluminum alloy head hot stamping process one-step forming process as claimed in claim 1, wherein the height of the base material after the first pre-pressing process in S1 is 1/4 of the height of the finished product, the height of the base material after the second pre-pressing process is 2/4 of the height of the finished product, and the height of the base material after the third pre-pressing process is 3/4 of the height of the finished product.
8. The aluminum alloy head hot stamping process one-step forming process according to claim 1, wherein the upper die is a flat die.
9. The aluminum alloy head hot stamping process one-step forming process according to claim 1, wherein the heating furnace is a liquefied gas furnace.
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| CN202011084267.5A CN112246950B (en) | 2020-10-12 | 2020-10-12 | One-step forming process for hot stamping process of aluminum alloy seal head |
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| CN202011084267.5A CN112246950B (en) | 2020-10-12 | 2020-10-12 | One-step forming process for hot stamping process of aluminum alloy seal head |
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| CN112246950A CN112246950A (en) | 2021-01-22 |
| CN112246950B true CN112246950B (en) | 2022-06-21 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1287045A (en) * | 1969-09-09 | 1972-08-31 | Aluminum Co Of America | Method of forming a container body and container body formed thereby |
| CN105344790A (en) * | 2015-12-15 | 2016-02-24 | 北京航星机器制造有限公司 | Integral formation method of aluminum alloy thin-wall spherical head |
| CN106670291A (en) * | 2015-11-06 | 2017-05-17 | 青岛旭升封头有限公司 | Novel flat-base seal head |
| CN107309361A (en) * | 2017-08-03 | 2017-11-03 | 四川明日宇航工业有限责任公司 | A kind of hemisphere method for drawing |
| CN108723235A (en) * | 2018-04-29 | 2018-11-02 | 温州博德科技有限公司 | The idiosome moulding process of aluminum bottle |
| CN109570315A (en) * | 2018-11-13 | 2019-04-05 | 中南大学 | A kind of drawing cup preparation method of aluminum alloy strip part deep cooling |
-
2020
- 2020-10-12 CN CN202011084267.5A patent/CN112246950B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1287045A (en) * | 1969-09-09 | 1972-08-31 | Aluminum Co Of America | Method of forming a container body and container body formed thereby |
| CN106670291A (en) * | 2015-11-06 | 2017-05-17 | 青岛旭升封头有限公司 | Novel flat-base seal head |
| CN105344790A (en) * | 2015-12-15 | 2016-02-24 | 北京航星机器制造有限公司 | Integral formation method of aluminum alloy thin-wall spherical head |
| CN107309361A (en) * | 2017-08-03 | 2017-11-03 | 四川明日宇航工业有限责任公司 | A kind of hemisphere method for drawing |
| CN108723235A (en) * | 2018-04-29 | 2018-11-02 | 温州博德科技有限公司 | The idiosome moulding process of aluminum bottle |
| CN109570315A (en) * | 2018-11-13 | 2019-04-05 | 中南大学 | A kind of drawing cup preparation method of aluminum alloy strip part deep cooling |
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| CN112246950A (en) | 2021-01-22 |
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