CN112091045A - Composite stretch forming process method - Google Patents

Composite stretch forming process method Download PDF

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Publication number
CN112091045A
CN112091045A CN202010773502.3A CN202010773502A CN112091045A CN 112091045 A CN112091045 A CN 112091045A CN 202010773502 A CN202010773502 A CN 202010773502A CN 112091045 A CN112091045 A CN 112091045A
Authority
CN
China
Prior art keywords
die
working
stretching
belt
belts
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
CN202010773502.3A
Other languages
Chinese (zh)
Inventor
侯盛昌
叶建桥
赵欣华
邱永生
王树萱
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.)
Huludao Heatspin Autoparts Manufacturing Co ltd
Original Assignee
Huludao Heatspin Autoparts Manufacturing 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 Huludao Heatspin Autoparts Manufacturing Co ltd filed Critical Huludao Heatspin Autoparts Manufacturing Co ltd
Priority to CN202010773502.3A priority Critical patent/CN112091045A/en
Publication of CN112091045A publication Critical patent/CN112091045A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20Deep-drawing
    • B21D22/206Deep-drawing articles from a strip in several steps, the articles being coherent with the strip during the operation
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00Tools as parts of machines covered by this subclass
    • B21D37/10Die sets; Pillar guides

Abstract

The invention provides a composite stretch forming process. The two single working belts and the two stretching dies for twice stretching are combined into a composite stretching die with an upper working belt and a lower working belt, namely the working belts of the stretching die are changed into two stepped working belts which are continuous in a segmented manner, and the process of twice thinning and stretching is changed into a process which is finished once; the composite stretch forming is composed of a workpiece, a punch and a stretching die; the drawing die comprises a drawing die upper end surface, a drawing die lower end surface, a drawing die outer circular surface and a drawing die working belt; the working belt of the drawing die is divided into a first working belt of the drawing die and a second working belt of the drawing die, the inner diameter sizes of the first working belt and the second working belt are different, and the first working belt and the second working belt are distributed in the inner cavity of the drawing die in a stepped mode. The working belt of the drawing die is improved into two working belts in a segmented continuous step mode, the process of twice thinning and drawing is changed into the process which is completed once, and the production rate is doubled. The method is suitable for being applied as a stretch forming method.

Description

Composite stretch forming process method
Technical Field
The invention relates to a stretch forming method in the field of pressure processing, in particular to a composite stretch forming process method.
Background
At present, finished products produced in a stamping and stretching forming process are formed by thinning and stretching, and in actual production, when the deformation coefficient of stretching once exceeds the limit sometimes due to the change of materials or varieties, workpieces are easy to break; the stretching is carried out twice, the cost is doubled, and waste is caused. Under such circumstances, a problem of the research of the composite stretching has arisen.
Disclosure of Invention
The invention provides a composite stretch forming process method in order to solve the problem that the production cost of a two-time stretching process is multiplied. The method comprises the steps of combining two single working belts and two stretching dies for twice stretching into a composite stretching die with an upper working belt and a lower working belt, namely, the working belts of the stretching dies are improved into two stepped working belts which are continuous in a segmented manner, so that the twice thinning and stretching process is changed into a once-finished technological process, and the technical problem that the twice forming production cost of the thinning and stretching is multiplied is solved.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a composite stretch forming process method is to combine two single working belts and two stretching dies for twice stretching into a composite stretching die with an upper working belt and a lower working belt, namely, the working belts of the stretching die are changed into two stepped working belts which are continuous in a segmented manner, and the process of twice thinning and stretching is changed into the process which is finished once;
the composite stretch forming comprises a workpiece, a punch head in the workpiece and a stretching die for stretching the workpiece; the drawing die comprises a drawing die upper end surface, a drawing die lower end surface, a drawing die outer circular surface and a drawing die working belt; the stretching die working belt is arranged on the inner cavity of the stretching die to limit a workpiece; the working band of the drawing die is divided into a first working band and a second working band, the inner diameter of the first working band is different from that of the second working band, and the size of the second working band is slightly smaller than that of the first working band and is distributed in the inner cavity of the drawing die in a stepped manner.
In order to further solve the technical problem to be solved by the invention, in the composite stretch forming process method provided by the invention, a transition groove is arranged between the first working belt and the second working belt of the inner cavity of the stretching die, and the transition groove is trapezoidal. The size of the second working band is slightly smaller than that of the first working band, and reasonable distribution is carried out according to specific conditions.
The method has the advantages that in the original production, two stretching dies are required to be manufactured for a workpiece needing two-time stretching forming, and two-time annealing, phosphorization and other processing treatments before two-time stretching are carried out; after improvement, the same workpiece is produced, and the whole process is changed from twice to once. Obviously, the labor productivity is doubled, the cost is reduced to one half of the original cost, and the enterprise benefit is increased.
Drawings
FIG. 1 is a schematic view of a prior art ironing process;
FIG. 2 is a schematic diagram of the ironing process of the present invention.
In the figure, 1, a punch, 2, a workpiece, 3, an upper end face of a drawing die, 4, a working band of the drawing die, 4.1, a first working band, 4.2, a second working band, 5, an outer circular face of the drawing die and 6, a lower end face of the drawing die.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in the figure, a composite drawing forming method is to combine two single working belts and two drawing dies for twice drawing into a composite drawing die with an upper working belt and a lower working belt, namely the working belts of the drawing die are changed into two stepped working belts which are continuous in a segmented manner, and the process of twice thinning and drawing is converted into a process which is finished once.
Description figure 1 shows a schematic of a prior art process. The process method is that the composite stretch forming is composed of a workpiece 2, a punch 1 in the workpiece 2 and a stretching die for stretching the workpiece 2; the drawing die comprises a drawing die upper end surface 3, a drawing die lower end surface 6, a drawing die outer circular surface 5 and a drawing die working belt 4; the stretching die working belt 4 is arranged on the inner cavity of the stretching die and used for limiting the size of the workpiece 2 and thinning and stretching under the action of the punch 1 for forming, when the deformation coefficient of the stretching of one time exceeds the limit, thinning and stretching for the second time are needed, and two stretching dies with different inner diameter sizes of the stretching die working belt are used for thinning and stretching for two times.
In this specification, fig. 2 shows an improved composite stretch forming method according to the present invention. Different from the prior art, the working band of drawing die divide into first working band 4.1 and second working band 4.2 two parts, and first working band 4.1 is different with second working band 4.2 internal diameter size, and second working band size slightly is less than first working band, is cascaded continuous distribution in drawing die inner chamber for work piece 2 is under the effect of drift 1, step by step deformation continuous stretching carries out the shaping, becomes the technological process of once accomplishing twice thinningly tensile process, has reduced technology cost.
In addition, as shown in fig. 2 in the specification, a transition groove is arranged between the first working belt 4.1 and the second working belt 4.2 in the inner cavity of the drawing die, so that the forming pressure is reduced, the space for dissipating heat of the drawing die is increased, and the shock absorption and buffering effects are achieved.
The transition groove is trapezoidal, and the depth of the trapezoidal groove is determined according to the specific situation of the workpiece 2.
The working principle of the invention is as follows:
in the original production, two stretching dies of a working tape need to be stretched twice, and the dies need to be replaced, so that the required size of a workpiece can be achieved. Two single working belts, two stretching dies for two times of stretching are combined into one composite stretching die with an upper working belt and a lower working belt. The workpiece with the same size can be finished by only installing the die once and performing stretching once. The labor productivity is doubled, the cost is reduced to one half of the original cost, and the enterprise benefit is increased.
The invention has the advantages that:
because the original working belt is increased to two working belts with different sizes on the same drawing die to perform thinning drawing once, workpieces with the same size can be finished by only mounting the die once and performing pretreatment such as annealing, phosphorization and the like and drawing once, and the labor productivity is doubled.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims (4)

1. A composite stretch forming process method is characterized by comprising the following steps: a composite stretch forming method is to combine two single working belts and two stretching dies for two-time stretching into a composite stretching die with upper and lower working belts, i.e. the working belts of the stretching die are changed from one stepped working belt into two continuous working belts in sections, and the two-time thinning and stretching process is changed into a one-time process.
2. An apparatus for carrying out the composite stretch-forming process of claim 1, wherein: the device consists of a workpiece (2), a punch (1) of the workpiece (2) and a drawing die of the workpiece (2); the drawing die comprises a drawing die upper end surface (3), a drawing die lower end surface (6), a drawing die outer circular surface (5) and a drawing die working belt (4); the drawing die working belt (4) is arranged on the inner cavity of the drawing die and used for limiting the size of the workpiece (2); the working band of the drawing die is divided into a first working band (4.1) and a second working band (4.2), the inner diameter of the first working band (4.1) is different from the inner diameter of the second working band (4.2), and the size of the second working band is slightly smaller than that of the first working band and is distributed in the inner cavity of the drawing die in a stepped manner.
3. The apparatus of claim 2, wherein: a transition groove is arranged between the first working belt (4.1) and the second working belt (4.2) of the inner cavity of the drawing die.
4. The apparatus of claim 3, wherein: the transition groove is trapezoidal, and the depth of the trapezoidal groove is determined according to the specific situation of the workpiece (2).
CN202010773502.3A 2020-08-04 2020-08-04 Composite stretch forming process method Pending CN112091045A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010773502.3A CN112091045A (en) 2020-08-04 2020-08-04 Composite stretch forming process method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010773502.3A CN112091045A (en) 2020-08-04 2020-08-04 Composite stretch forming process method

Publications (1)

Publication Number Publication Date
CN112091045A true CN112091045A (en) 2020-12-18

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010773502.3A Pending CN112091045A (en) 2020-08-04 2020-08-04 Composite stretch forming process method

Country Status (1)

Country Link
CN (1) CN112091045A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113042604A (en) * 2021-04-23 2021-06-29 中北大学 Labor-saving thinning and stretching method adopting roller structure

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT298944B (en) * 1968-02-15 1972-05-25 Std Services Ltd Method and device for producing a container from a sheet-like blank made of metal
CN101767154A (en) * 2010-03-26 2010-07-07 北京三兴汽车有限公司 Stepped cylindrical component die for medium plate
KR101473230B1 (en) * 2014-04-15 2014-12-17 주식회사 모리스 Deep drawing method for square storage
CN207086585U (en) * 2017-09-02 2018-03-13 淄博通光都金属科技有限公司 A kind of integral type drawing mould of secondary reducing aluminium-alloy pipe
CN110722045A (en) * 2019-10-28 2020-01-24 安徽工业大学 Deep barrel high-reduction-rate deep drawing process

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT298944B (en) * 1968-02-15 1972-05-25 Std Services Ltd Method and device for producing a container from a sheet-like blank made of metal
CN101767154A (en) * 2010-03-26 2010-07-07 北京三兴汽车有限公司 Stepped cylindrical component die for medium plate
KR101473230B1 (en) * 2014-04-15 2014-12-17 주식회사 모리스 Deep drawing method for square storage
CN207086585U (en) * 2017-09-02 2018-03-13 淄博通光都金属科技有限公司 A kind of integral type drawing mould of secondary reducing aluminium-alloy pipe
CN110722045A (en) * 2019-10-28 2020-01-24 安徽工业大学 Deep barrel high-reduction-rate deep drawing process

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113042604A (en) * 2021-04-23 2021-06-29 中北大学 Labor-saving thinning and stretching method adopting roller structure

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