CN116571629A - Forming method and forming die for stackable conical metal cup - Google Patents

Forming method and forming die for stackable conical metal cup Download PDF

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Publication number
CN116571629A
CN116571629A CN202310220768.9A CN202310220768A CN116571629A CN 116571629 A CN116571629 A CN 116571629A CN 202310220768 A CN202310220768 A CN 202310220768A CN 116571629 A CN116571629 A CN 116571629A
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CN
China
Prior art keywords
cup
stretching
die
cup body
forming
Prior art date
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.)
Pending
Application number
CN202310220768.9A
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Chinese (zh)
Inventor
安旭
杨志华
汪洋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Suzhou SLAC Precision Equipment Co Ltd
Original Assignee
Suzhou SLAC Precision Equipment Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Suzhou SLAC Precision Equipment Co Ltd filed Critical Suzhou SLAC Precision Equipment Co Ltd
Priority to CN202310220768.9A priority Critical patent/CN116571629A/en
Publication of CN116571629A publication Critical patent/CN116571629A/en
Pending legal-status Critical Current

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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
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/10—Die sets; Pillar guides
    • 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
    • B21D19/00—Flanging or other edge treatment, e.g. of tubes
    • B21D19/12—Edge-curling
    • 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
    • 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
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/18—Making hollow objects characterised by the use of the objects vessels, e.g. tubs, vats, tanks, sinks, or the like
    • 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
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/80—Packaging reuse or recycling, e.g. of multilayer packaging

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)

Abstract

A forming method of stackable conical metal cup, which selects a metal hollow body with an open upper part as a material cup, comprises the following steps: step one, transferring the material cup to a flanging station, and carrying out flanging treatment on an upper opening of the material cup to enable the material cup to be a first cup body with a flanging structure; step two, conveying the first cup body to a stretching station, and rotating the first cup body until the opening part of the first cup body faces downwards; then stretching at least twice from the cup bottom to the opening direction to enable the first cup body to be a second cup body, wherein the periphery of the bottom of the second cup body forms a plurality of steps in the up-down direction, and the diameter of the second cup body is gradually increased from top to bottom; and thirdly, conveying the second cup body to a hemming station for hemming, and hemming the flanging structure of the mouth part of the second cup body to form a third cup body with a hemming structure. The method reduces the difficulty and rejection rate of the prior art that the middle blank pressing is performed by stretching from the cup mouth to the cup bottom.

Description

Forming method and forming die for stackable conical metal cup
Technical Field
The invention relates to the technical field of forming of stackable conical metal cups, in particular to a forming method and a forming die of a stackable conical metal cup.
Background
In the prior art, the formation of a plurality of steps of a cup body in the forming of a stackable conical metal cup is mostly realized by a method of stretching the cup body from a cup opening to a cup bottom step by step.
The existing stretch forming method has the following problems: because the diameter from the cup mouth to the cup bottom of the cup body is gradually reduced, in the stretching operation of the large diameter of the cup mouth to the small diameter of the cup bottom, the stretching and edge pressing work difficulty is high and the rejection rate is high because the size difference among a plurality of steps is small.
Therefore, how to solve the above-mentioned drawbacks of the prior art is a subject to be studied and solved by the present invention.
Disclosure of Invention
The invention aims to provide a forming method and a forming die of a stackable conical metal cup.
In order to achieve the above purpose, the invention adopts the following technical scheme: a forming method of stackable conical metal cup, which selects a metal hollow body with an open upper part as a material cup, comprises the following steps:
step one, transferring the material cup to a flanging station, and carrying out flanging treatment on an upper opening of the material cup to enable the material cup to be a first cup body with a flanging structure;
step two, conveying the first cup body to a stretching station, rotating the first cup body until the opening part is downward, and stretching at least twice from the cup bottom to the opening part direction to enable the first cup body to be a second cup body, wherein the periphery of the bottom of the second cup body forms a plurality of steps in the up-down direction, and the diameter of the second cup body is gradually increased from top to bottom;
and thirdly, conveying the second cup body to a hemming station for hemming, and hemming the flanging structure of the mouth part of the second cup body to enable the second cup body to be a third cup body with a hemming structure.
In a further scheme: the first step further comprises the following steps:
and a pre-step of cutting the upper opening of the material cup to enable the edge of the upper opening to be flat.
In a further scheme: further comprises:
and step four, conveying the third cup body to a shaping station for integral shaping to form a fourth cup body.
In a further scheme: the width of the step formed by stretching in the second step is 0.5-1.5mm, and the angle is 30-45 degrees.
In a further scheme: and in the second step, the opening angle of the inner diameter of the second cup body formed by stretching is more than or equal to 0.5-2 degrees.
In a further scheme: and thirdly, carrying out hemming treatment to form a hemming structure with the length of 1-3mm and the hemming R angle of 2-3.
In a further scheme: and in the third step, the second cup body is curled from inside to outside.
The working principle and the advantages of the invention are as follows:
the forming method of the stackable conical metal cup adopts the existing pop can body to carry out stretching forming (or other tank bodies with bottomless structures, the bottoming work is needed to be further performed, the bottoming work is well known to the person skilled in the art, and therefore details are not needed), and adopts a mode of stretching at least twice from the bottom of the cup to the opening direction, so that the material cup becomes the conical metal cup with a plurality of steps and capable of realizing stacking.
Because the size difference between each step is small, and the diameter of the cup body is gradually increased from the cup bottom to the cup mouth, the method adopts a mode of stretching from the cup bottom to the cup mouth, solves the problems of large edge pressing difficulty and high rejection rate existing in the prior art of stretching from the cup mouth to the cup bottom, and improves the yield of stackable conical metal cups.
The specific process requirements of flanging and hemming are well known to those skilled in the art, so the description is omitted.
The invention also provides a forming die of the stackable conical metal cup, which comprises a stretching die and a shaping die;
the stretching die comprises an upper die assembly and a lower die assembly;
the upper die assembly comprises an upper die fixing seat, an upper die pressing cover, a stretching female die and a pressing inner top, wherein the stretching female die and the pressing inner top are both arranged on the upper die fixing seat, the pressing inner top is arranged on the inner periphery of the stretching female die, and the upper die pressing cover is arranged on the outer periphery of the stretching female die and is arranged on the upper die fixing seat;
the lower die assembly comprises a punch head which is arranged corresponding to the stretching female die, and a blank holder is sleeved outside the punch head;
the shaping die structure is the same as the stretching die structure.
In a further scheme: pits of the shaping and stretching female die in the shaping die are set according to stretching times.
In a further scheme: the number of pits of the stretching female die in the shaping die is the same as the stretching times.
In a further scheme: the size of the stretching die increases as the size of the stretching step increases.
The working principle and the advantages of the invention are as follows:
the stretching die is provided with a plurality of to according to stretching number of times setting (stretching die is changed once in every time), first cup is sent to stretching die department, and the blank holder is fixed the cup of first cup, and the top is fixed the bottom of first cup (to the cup that has now had the bottom in the swage), and stretching die and drift cooperation stretch first cup, and a mould carries out once stretching, and stretching finishes and sends to plastic die department and carry out whole shaping, makes whole cup and a plurality of stretching steps smoother.
The stretching die and the shaping die are simple in structure and easy to operate, and the forming speed of the stackable conical metal cup is improved.
Drawings
FIG. 1 is a schematic diagram of a material cup structure according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a structure after flanging in an embodiment of the present invention;
FIG. 3 is a schematic diagram of a structure after multiple stretching according to an embodiment of the present invention;
FIG. 4 is an enlarged view of the structure at A in FIG. 3;
FIG. 5 is a schematic diagram of a structure after hemming and shaping according to an embodiment of the present invention;
FIG. 6 is an enlarged view of the structure at B in FIG. 5;
FIG. 7 is a schematic view of the structure at C in FIG. 5;
FIG. 8 is a flow chart of a method of forming stackable conical metal cups according to an embodiment of the present invention;
FIG. 9 is a schematic drawing showing a drawing die structure according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a shaping mold according to an embodiment of the present invention.
In the above figures: 1. a material cup; 2. stretching a die; 3. shaping a die; 4. a first cup; 5. a second cup; sixthly, a third cup body; 7. a fourth cup; 11. a step; 12. the upper part is open; 13. a flanging structure; 14. a cup bottom; 15. a hemming structure; 21. an upper die assembly; 211. an upper die fixing seat; 212. a die pressing cover is arranged; 213. stretching the female die; 214. pressing an inner roof of the material; 22. a lower die assembly; 221. a punch; 222. edge pressing sleeves; 31. pits; 313. and shaping and stretching the female die.
Description of the embodiments
The invention is further described below with reference to the accompanying drawings and examples:
examples: the present invention will be described in detail with reference to the drawings, wherein modifications and variations are possible in light of the teachings of the present invention, without departing from the spirit and scope of the present invention, as will be apparent to those of skill in the art upon understanding the embodiments of the present invention.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure. Singular forms such as "a," "an," "the," and "the" are intended to include the plural forms as well, as used herein.
The terms "first," "second," and the like, as used herein, do not denote a particular order or sequence, nor are they intended to be limiting, but rather are merely used to distinguish one element or operation from another in the same technical term.
As used herein, "connected" or "positioned" may refer to two or more components or devices in physical contact with each other, or indirectly, or in operation or action with each other.
As used herein, the terms "comprising," "including," "having," and the like are intended to be open-ended terms, meaning including, but not limited to.
The term (terms) as used herein generally has the ordinary meaning of each term as used in this field, in this disclosure, and in the special context, unless otherwise noted. Certain terms used to describe the present disclosure are discussed below, or elsewhere in this specification, to provide additional guidance to those skilled in the art in connection with the description herein.
Referring to fig. 1 to 8, a method for forming a stackable conical metal cup, which comprises the steps of:
step one, transferring the material cup 1 to a flanging station, and carrying out flanging treatment on an upper opening 12 of the material cup 1 to enable the material cup 1 to be a first cup body 4 with a flanging structure 13; the structural strength of the first cup 4 is improved to have supporting force.
Step two, the first cup body 4 is sent to a stretching station, the first cup body 4 is rotated to the position that the opening part faces downwards, and then stretching is carried out at least twice from the cup bottom 14 to the opening part direction, so that the first cup body 4 becomes a second cup body 5, a plurality of steps 11 are formed on the periphery of the bottom of the second cup body 5 in the vertical direction, and the diameter of the second cup body 5 is gradually increased from top to bottom. (the number of steps 11 and the number of stretching times are the same, i.e., each stretching is performed once, one step 11 is formed.)
And thirdly, conveying the second cup body 5 to a hemming station for hemming, and hemming the flanging structure 13 at the mouth of the second cup body 5 to enable the second cup body 5 to be a third cup body 6 with a hemming structure 15.
On this basis, as shown in fig. 8, the first step further includes:
a pre-step of cutting the upper opening 12 of the material cup 1 to ensure that the edge of the upper opening 12 is neat; whether cutting is required is determined by the flatness of the upper opening 12, and if the upper opening 12 is flat, no preliminary step operation is required.
On this basis, as shown in fig. 8, the method further comprises:
and step four, conveying the third cup body 6 to a shaping station for integral shaping to form a fourth cup body 7, and shaping a plurality of stretching steps 11 of the material cup to enable the steps 11 and the whole cup body to be smoother.
On this basis, as shown in fig. 4, the step 11 formed by stretching in the second step has a width d1 of 0.5 to 1.5mm and an angle α of 30 to 45 degrees.
On this basis, as shown in fig. 7, the inner diameter opening angle β of the second cup 5 stretched in the second step is greater than or equal to 0.5-2 degrees.
On this basis, as shown in fig. 6, the third cup 6 formed by the curling process in the third step has a curled length d2 of 1-3mm and a curled R angle of 2-3.
On the basis, the second cup body 5 is curled in the third step from inside to outside.
The working principle and the advantages of the invention are as follows:
the forming method of the stackable conical metal cup adopts the existing pop can body to stretch and form (or other can bodies with bottomless structures, the bottoming work is needed to be further performed, and is well known to the person skilled in the art, so that details are not needed), and the forming method adopts a mode of stretching at least twice from the cup bottom 14 to the mouth direction (four stretching is adopted in the embodiment), so that the material cup 1 becomes the conical metal cup with a plurality of steps and capable of realizing stacking.
Because the size difference between each step is small, and the diameter of the cup body is gradually increased from the cup bottom to the cup mouth, the method adopts a mode of stretching from the cup bottom 14 to the cup mouth 12, the problems of large edge pressing difficulty and high rejection rate in the prior art that the cup mouth is stretched to the cup bottom are solved, and the yield of the stackable conical metal cup is improved.
The specific process requirements of flanging and hemming are well known to those skilled in the art, so the description is omitted.
Referring to fig. 9 and 10, a forming mold for stackable conical metal cups includes a drawing mold 2 and a shaping mold 3.
The stretching die 2 includes an upper die assembly 21 and a lower die assembly 22.
The upper die assembly 21 comprises an upper die fixing seat 211, an upper die pressing cover 212, a stretching female die 213 and a pressing inner top 214, wherein the stretching female die 213 and the pressing inner top 214 are both arranged on the upper die fixing seat 211, the pressing inner top 214 is arranged on the inner periphery of the stretching female die 213, and the upper die pressing cover 212 is arranged on the outer periphery of the stretching female die 213 and is arranged on the upper die fixing seat 211.
The lower die assembly 22 comprises a punch 221 which is arranged corresponding to the stretching die, and a blank holder 222 is sleeved outside the punch 221.
The shaping die 3 has the same structure as the stretching die 2.
On this basis, the number of pits 31 of the shaping and stretching female die 313 in the shaping die 3 is the same as the number of stretching times, and the number of pits 31 is set with the number of stretching times.
On this basis, the size of the stretching die 2 increases as the size of the stretching step increases; as shown in fig. 3, the uppermost step is formed by stretching, and then a plurality of steps 11 are formed by stretching downwards in sequence, the size of the steps 11 is gradually increased, and the size of the stretching die 2 is also gradually increased in the whole stretching process.
The working principle and the advantages of the invention are as follows: the stretching die is provided with a plurality of to according to stretching number setting, first cup 4 is sent to stretching die 2 department, and blank holder 222 fixes the cup of first cup 4, and the material is pressed to interior top 214 and is fixed the bottom of first cup 4 (to the cup that has now had the bottom), and stretching die 213 and drift 221 cooperation stretch first cup 4, and a mould carries out once stretching, and stretching finishes and sends to plastic die 3 department and carry out whole shaping, makes a plurality of stretching steps of whole cup smoother.
The drawing die 2 and the shaping die 3 are simple in structure and easy to operate, and the forming rate of the stackable conical metal cups is improved.
The above embodiments are provided to illustrate the technical concept and features of the present invention and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.

Claims (10)

1. A method of forming a stackable conical metal cup, comprising:
a metal hollow body with an upper opening (12) is selected as a material cup (1), and the forming method comprises the following steps:
step one, transferring the material cup (1) to a flanging station, and carrying out flanging treatment on an upper opening (12) of the material cup (1) to enable the material cup (1) to be a first cup body (4) with a flanging structure (13);
step two, conveying the first cup body (4) to a stretching station, rotating the first cup body (4) until the opening part is downward, and stretching at least twice from the cup bottom (14) to the opening part direction to enable the first cup body (4) to be a second cup body (5), wherein a plurality of steps (11) are formed on the periphery of the bottom of the second cup body (5) in the up-down direction, and the diameter of the second cup body (5) is gradually increased from top to bottom;
and thirdly, conveying the second cup body (5) to a hemming station for hemming, and hemming the flanging structure (13) at the mouth of the second cup body (5) to enable the second cup body (5) to be a third cup body (6) with a hemming structure (15).
2. The method of forming a stackable conical metal cup according to claim 1, wherein: the first step further comprises the following steps:
and a pre-step of cutting the upper opening (12) of the material cup (1) to level the edge of the upper opening (12).
3. The method of forming a stackable conical metal cup according to claim 1, wherein: further comprises:
and step four, conveying the third cup body (6) to a shaping station for integral shaping to form a fourth cup body (7).
4. The method of forming a stackable conical metal cup according to claim 1, wherein: the width of the step (11) formed by stretching in the second step is 0.5-1.5mm, and the angle is 30-45 degrees.
5. The method of forming a stackable conical metal cup according to claim 1, wherein: and in the second step, the inner diameter opening angle of the second cup body (5) formed by stretching is more than or equal to 0.5-2 degrees.
6. The method of forming a stackable conical metal cup according to claim 1, wherein: the length of the hemming structure (15) formed by hemming treatment in the third step is 1-3mm, and the R angle of the hemming is 2-3.
7. The method of forming a stackable conical metal cup according to claim 1, wherein: and in the third step, the second cup body (5) is curled from inside to outside.
8. A stackable conical metal cup forming die, characterized by: comprises a stretching die (2) and a shaping die (3);
the stretching die (2) comprises an upper die assembly (21) and a lower die assembly (22);
the upper die assembly (21) comprises an upper die fixing seat (211), an upper die pressing cover (212), a stretching female die (213) and a pressing inner top (214), wherein the stretching female die (213) and the pressing inner top (214) are both arranged on the upper die fixing seat (211), the pressing inner top (214) is arranged on the inner periphery of the stretching female die (213), and the upper die pressing cover (212) is arranged on the outer periphery of the stretching female die (213) and is arranged on the upper die fixing seat (211);
the lower die assembly (22) comprises a punch (221) which is arranged corresponding to the stretching female die (213), and a blank holder (222) is sleeved outside the punch (221);
the shaping die (3) has the same structure as the stretching die (2).
9. The stackable tapered metal cup forming die of claim 8, wherein: the number of pits (31) of the shaping and stretching female die (313) in the shaping die (3) is the same as the stretching times.
10. The stackable tapered metal cup forming die of claim 8, wherein: the size of the stretching die (2) increases as the size of the stretching step (11) increases.
CN202310220768.9A 2023-03-09 2023-03-09 Forming method and forming die for stackable conical metal cup Pending CN116571629A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310220768.9A CN116571629A (en) 2023-03-09 2023-03-09 Forming method and forming die for stackable conical metal cup

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310220768.9A CN116571629A (en) 2023-03-09 2023-03-09 Forming method and forming die for stackable conical metal cup

Publications (1)

Publication Number Publication Date
CN116571629A true CN116571629A (en) 2023-08-11

Family

ID=87532870

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310220768.9A Pending CN116571629A (en) 2023-03-09 2023-03-09 Forming method and forming die for stackable conical metal cup

Country Status (1)

Country Link
CN (1) CN116571629A (en)

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