CN103978085A - Stamping forming method - Google Patents
Stamping forming method Download PDFInfo
- Publication number
- CN103978085A CN103978085A CN201410137971.0A CN201410137971A CN103978085A CN 103978085 A CN103978085 A CN 103978085A CN 201410137971 A CN201410137971 A CN 201410137971A CN 103978085 A CN103978085 A CN 103978085A
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- steel plate
- ldpe film
- plate blank
- ldpe
- press
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- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention discloses a stamping forming method which comprises the following steps: (1) paving one LDPE (Low Density Polyethylene) film on a positioning platform of a concave mould; (2) paving a steel plate blank on the LDPE film; (3) paving the other LDPE film on the steel plate blank; (4) arranging an edge-pressing ring on the other LDPE film and clamping the steel plate blank between the edge-pressing ring and the concave mould; (5) arranging a convex mould above the concave mould, downward stamping and downward stretching and forming the steel plate blank; (6) back tracking the convex mould, upward lifting and quitting. Furthermore, an oil press is arranged; the concave mould is arranged on a base of the oil press; the convex mould is arranged on a hydraulic cylinder of the oil press. According to the stamping forming method, the technical problems of difficulty in cleaning of a manufactured end socket, low yield of X-ray shooting flaw detection and high repair rate after welding are solved; the structure is simple and the cost is low; the method is fit for industrial production.
Description
Technical field
The present invention relates to a kind of cold stamping field.
Background technology
The wide model of end socket that cold stamping is shaped be applied to that industrial and mining enterprises produce and product for civilian use manufacture in, low-pressure pressure container container, social required quantity is huge.In recent years, in the steel that my company manufactures, low-pressure pressure container number of units often increases progressively with 30% every year, annual production is crossed 20,000.
The traditional cold process for stamping and forming of end socket is: the upper bottom surface contacting with mould at steel plate blank in advance and bottom surface are all coated lubricating oil, carries out punching press, stretch forming.Wherein, doing punching stretch process lubricated with lubricating oil is the frictional resistance that reduces steel plate blank forming process, reduces to cause forming head to be pulled because frictional resistance is excessive scrapping.
But, in head pressing stretch forming process, because steel plate crystal grain stretches, attenuate strengthens rough surface to this lubricating method, lubricating oil infiltrates and sticks to surface of steel plate, make the lubricating oil of shaping rear head surfaces externally and internally thoroughly remove, while welding after causing end socket group to circumferential weld, lubricating oil is heated to burn and produces a large amount of dense smoke, dense smoke mist and combustion residue penetrate in weld seam and make weld seam produce pore and slag inclusion, cause Weld Seam Repairation rate high, weld seam x-ray inspection qualification rate is low, thereby increases production cost and the production cycle of product.
The applicant is for solving seal head forming rear surface oil removal problem, through searching document and experiment screening, adopt compressed air blasting method to remove to stick to end socket surface and oil contaminant effect relatively good, end socket group is to becoming girth joint, and after welding forming, taking X-ray flaw detection qualification rate is improved significantly.But, but this sweep-out method increases overall production cost, and production efficiency reduces.
Summary of the invention
The technical problems such as technical problem to be solved by this invention is, overcomes the deficiencies in the prior art, and a kind of cold stamping structure is provided, and makes the end socket making can avoid lubricating oil to adhere to, and solves and is difficult to clean, and taking X-ray flaw detection qualification rate is low.
The present invention solves this technical problem adopted technical scheme: a kind of press-processing method, and its step is as follows:
(1) ldpe film is laid on the locating table of die;
(2) a steel plate blank is laid on this ldpe film;
(3) another ldpe film is layed on this steel plate blank;
(4) on this other ldpe film, put a flanging ring, by this plate slab material clamping between this flanging ring and die;
(5) punch is placed in this die top, and punching press downwards, and this steel plate blank pulls down and is stretched into shape;
(6) this punch return, to rising, exits.
Further, also comprise hydraulic press, this die is placed on the base of hydraulic press, and this punch is placed on the hydraulic cylinder of this hydraulic press.
Further, this ldpe film is the non-ldpe film that new section is made that returns.
Particularly, the thickness of this ldpe film is 0.020～0.030mm,
Preferably, the thickness of this ldpe film is 0.025mm.
Principle of the present invention is: ldpe film be heated 350 DEG C-450 DEG C can cracking, and produce carbide under the condition of anoxic HTHP, according to this characteristic of LDPE plastic sheeting, in conjunction with cold stamping end socket process, the present invention determines the lubricant that utilizes LDPE plastic sheeting to replace end socket cold stamping to be shaped, and LDPE plastic sheeting is layed in respectively to upper bottom surface and the bottom surface of steel plate blank.Use end socket of the present invention, the defects such as pulling does not smoothly appear in outward appearance after cold stamping is shaped, just be stained with one deck black carbon compound as thin as a wafer at end socket outer surface straight flange position, a cloth foam or be easy to thoroughly be removed in the time adopting flame cutting head skirt gently for these black carbon compounds, cleaning after release seal head forming, sandblast operation, the welding quality that ensures weld seam, has improved weld seam x-ray inspection qualification rate, effectively boosts productivity and reduces production costs.
In order to understand more intuitively technique effect of the present invention, with the present invention, control group one, control group two, control group three and control group four end socket of actual production same size respectively.The punching structure of control group one is similar to the present invention, and its difference is, two ldpe films of the present invention are replaced to HDPE film; Control group two is also similar to the present invention, and difference is, two ldpe films of the present invention is replaced to the ldpe film of waste and old reclaiming; Control group three is also similar to the present invention, and difference is, two ldpe films of the present invention are replaced to PVC film; Control group four is not provided with ldpe film, but coats machine oil or vegetable oil at upper bottom surface and the bottom surface of steel plate blank.To make
the end socket of wall thickness is example, and its experiment the results are shown in Table 1.
As shown in Table 1, by contrasting with HDPE film, machine oil or vegetable oil, ldpe film has good lubricant effect for cold stamping, makes the end socket of making possess easy cleaning, taking X-ray flaw detection qualification rate advantages of higher.
Compared with prior art, there is following good effect: 1, the invention solves prepared end socket and be difficult to clean, taking X-ray flaw detection qualification rate is low, the high technical problem of repair rate after welding, and simple in structure, with low cost, be widely used in industrial production; 2, because prior art need to be coated with film lubricating oil on steel plate blank, and letter of the present invention has economized this step, has improved production efficiency, increases economic efficiency.
Below in conjunction with drawings and Examples, the invention will be further described.
Brief description of the drawings
Fig. 1 is the schematic diagram of disassembling of the present invention.
Fig. 2 is combination schematic diagram of the present invention.
Detailed description of the invention
Refer to Fig. 1 and Fig. 2, the present invention includes die 10, punch 20, flanging ring 30, steel plate blank 40 and two ldpe films 50.
Further, also comprise hydraulic press 60, this hydraulic press 60 comprises frame 61, motor 62, hydraulic pump 63, fuel tank 64, base 66 and hydraulic cylinder 67.Frame 61 is made up of top board 611, base plate 613 and Duo Gen pillar 612, and the two ends of this pillar 612 connect respectively top board 611 and base plate 613.Motor 62 and fuel tank 64 connecting fluid press pump 63 respectively, hydraulic cylinder 67 is located in frame 61, and be connected with hydraulic pump 63 by petroleum pipeline and oil return pipe, this hydraulic cylinder 67 has hydraulic pressure crossbeam 65, this hydraulic pressure crossbeam 65 is horizontally disposed with, and is flexibly connected with the pillar 612 of frame 61.Control this hydraulic cylinder 67 by hydraulic pump 63 and eject downwards, hydraulic pressure crossbeam 65 is movable vertically for limiting hydraulic cylinder.Base 66 is fixedly located on the base plate 613 of frame 61, and coexists on a perpendicular bisector with the hydraulic cylinder 67 of top.This punch 20 is located on hydraulic cylinder 67, and this die 10 is located on base 66.
Be used for cold stamping ellipsoidal head as example taking the present invention, its production process is as follows: two ldpe films 50 of cutting in advance, make every ldpe film 50 identical with circular steel plate blank material 40 sizes; This punch 20 is located on the hydraulic cylinder 67 of hydraulic press 60, and this die 10 is located on the base 66 of hydraulic cylinder 67.First a circular ldpe film 50 is laid on the locating table of die 10.Circular steel plate blank material 40 is laid on this ldpe film 50, again another circular ldpe film 50 is layed on circular steel plate blank material 40, on this other circular ldpe film 50, put a flanging ring 30, by screw, this circular steel plate blank material 40 is clamped between this flanging ring 30 and die 20.Then, the downward punching press of punch 20 on the hydraulic cylinder 67 of hydraulic press 60, the downward stretch forming of circular steel plate blank material 40, hydraulic cylinder 67 returns of hydraulic press 60 are to rising, and punch 20 exits, and circular steel plate blank material 40 just strikes out an ellipsoidal head.
Preferably, this ldpe film 50 is low-density polyethylene film, and ldpe film 50 of the present invention is selected as non-and returned the ldpe film that new section is made.Because the new ldpe film of returning of waste and old reclaiming contains impurity, in punching course, produce a small amount of grease and particulate mixtures, so can not select the new ldpe film product of returning of waste and old reclaiming, these ldpe film 50 thickness are 0.020～0.030mm, particularly, these ldpe film 50 thickness are 0.025mm.
Learn through experimental analysis, in the time of punch 20 downward punching press, ldpe film 50 is clipped between steel plate blank 40 and punch 20/ die 10, due to end-sealing die and end cover blank contact gap minimum, therefore contact-making surface is now in anaerobic condition, in the time that steel plate blank 40 continues to stretch downwards due to the mutual friction of contact-making surface phase, end socket surface at contact-making surface forms moment HTHP, make LDPE plastic sheeting produce anoxic cracking and occur incomplete carbonization, generate the lubrication that a kind of carbide plays drawing process, this carbide lubricant can reduce coefficient of friction and frictional force effectively, make the end socket shaping of gliding smoothly.And these carbide self also have a bit minimum pulling force, also last carbonization of ldpe film 50 is described, it and end socket appearance plane do not produce adhesion, are easily eliminated yet.Exempt the cleaning of shaping rear head, sandblast operation, effectively boosted productivity and reduce production costs.
Attractive in appearance with the ellipsoidal head shaping of punching press of the present invention, ellipsoidal head tip circle radius and knuckle radius and head skirt meet the requirement of GB150-2011 " pressure vessel " manufacturer's standard completely, and end socket surfaces externally and internally is not adhering to any greasy dirt, only wipe end socket surfaces externally and internally with cloth one clean as new steel plate, meet pressure vessel welding requirements completely, while using this end socket to manufacture pressure vessel welding, do not produce thick smoke, postwelding weld seam is attractive in appearance round and smooth with mother metal transition, x-ray inspection qualification rate reaches more than 98%, improve production efficiency, reduced production costs.
This is made to cost accounting: will adopt the present invention prepared end socket and adopt oiliness mineral oil and vegetable oil as the cold stamping prepared end socket comparison of lubricated punching structure that is shaped, x-ray inspection qualification rate have improved 25%; In addition, save and clean or sandblast greasy dirt expense, to manufacture every year 40000 calculating of end socket, save and clean or sandblast greasy dirt expense (40000 × 1.5=60000 of end socket unit), save X-ray film and film making expense (5000 × 5=25000 of film unit), save Weld Seam Repairation expense and welding rod expense (reprocessing 5000 places × 10=50000 unit), within 1 year, add up to and save 13.5 ten thousand yuan.Also shorten the production cycle of product, improve the quality of products, create good economic benefits.
The present invention is not limited to above-mentioned embodiment, if various changes of the present invention or modification are not departed to the spirit and scope of the present invention, if within these changes and modification belong to claim of the present invention and equivalent technologies scope, the present invention is also intended to comprise these changes and modification.
Claims (5)
1. a press-processing method, is characterized in that, its step is as follows:
(1) ldpe film is laid on the locating table of die;
(2) a steel plate blank is laid on this ldpe film;
(3) another ldpe film is layed on this steel plate blank;
(4) on this other ldpe film, put a flanging ring, by this plate slab material clamping between this flanging ring and die;
(5) punch is placed in this die top, and punching press downwards, and this steel plate blank pulls down and is stretched into shape;
(6) this punch return, to rising, exits.
2. press-processing method as claimed in claim 1, is characterized in that: also comprise hydraulic press, this die is placed on the base of hydraulic press, and this punch is placed on the hydraulic cylinder of this hydraulic press.
3. press-processing method as claimed in claim 1, is characterized in that: this ldpe film is the non-ldpe film that new section is made that returns.
4. press-processing method as claimed in claim 1, is characterized in that: the thickness of this ldpe film is 0.020～0.030mm.
5. press-processing method as claimed in claim 4, is characterized in that: the thickness of this ldpe film is 0.025mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410137971.0A CN103978085B (en) | 2014-04-08 | 2014-04-08 | A kind of press-processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410137971.0A CN103978085B (en) | 2014-04-08 | 2014-04-08 | A kind of press-processing method |
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| Publication Number | Publication Date |
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| CN103978085A true CN103978085A (en) | 2014-08-13 |
| CN103978085B CN103978085B (en) | 2016-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410137971.0A Active CN103978085B (en) | 2014-04-08 | 2014-04-08 | A kind of press-processing method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108787842A (en) * | 2018-05-25 | 2018-11-13 | 江苏民诺特种设备有限公司 | The special staving stretching-machine of liquid gas storage tank semi-finished product |
| CN116532572A (en) * | 2023-07-06 | 2023-08-04 | 苏州乔凯机械科技有限公司 | Stamping equipment for metal processing |
| CN116809751A (en) * | 2023-08-30 | 2023-09-29 | 吴江市天富金属制品有限公司 | Body-building equipment chassis stretch forming device and forming process |
Citations (6)
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|---|---|---|---|---|
| US4935079A (en) * | 1980-06-26 | 1990-06-19 | Cmb Packaging (Uk) Limited | Methods of making polyethylene/metal laminates |
| JPH09123352A (en) * | 1995-10-31 | 1997-05-13 | Kanebo Ltd | Resin-coated metal plate for draw squeeze can and draw ironed can formed thereof |
| JPH09511182A (en) * | 1993-12-01 | 1997-11-11 | ジエイ マツクヘンリー，ロバート | Metal-plastic structure can by drawing and ironing, and its manufacturing method |
| CN1350892A (en) * | 2000-10-30 | 2002-05-29 | 高松勉 | Deep punching process |
| CN101134217A (en) * | 2007-10-16 | 2008-03-05 | 长安汽车（集团）有限责任公司 | Method for preventing cockling and cracking for the thin board deep drawing deep box shaped part or special-shaped part |
| US20100139357A1 (en) * | 2007-02-01 | 2010-06-10 | Thomas Haar | Method and device for deep drawing blanks made of sheet metal into flangeless moulded blanks |
-
2014
- 2014-04-08 CN CN201410137971.0A patent/CN103978085B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4935079A (en) * | 1980-06-26 | 1990-06-19 | Cmb Packaging (Uk) Limited | Methods of making polyethylene/metal laminates |
| JPH09511182A (en) * | 1993-12-01 | 1997-11-11 | ジエイ マツクヘンリー，ロバート | Metal-plastic structure can by drawing and ironing, and its manufacturing method |
| JPH09123352A (en) * | 1995-10-31 | 1997-05-13 | Kanebo Ltd | Resin-coated metal plate for draw squeeze can and draw ironed can formed thereof |
| CN1350892A (en) * | 2000-10-30 | 2002-05-29 | 高松勉 | Deep punching process |
| US20100139357A1 (en) * | 2007-02-01 | 2010-06-10 | Thomas Haar | Method and device for deep drawing blanks made of sheet metal into flangeless moulded blanks |
| CN101134217A (en) * | 2007-10-16 | 2008-03-05 | 长安汽车（集团）有限责任公司 | Method for preventing cockling and cracking for the thin board deep drawing deep box shaped part or special-shaped part |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108787842A (en) * | 2018-05-25 | 2018-11-13 | 江苏民诺特种设备有限公司 | The special staving stretching-machine of liquid gas storage tank semi-finished product |
| CN116532572A (en) * | 2023-07-06 | 2023-08-04 | 苏州乔凯机械科技有限公司 | Stamping equipment for metal processing |
| CN116532572B (en) * | 2023-07-06 | 2023-09-12 | 苏州乔凯机械科技有限公司 | Stamping equipment for metal processing |
| CN116809751A (en) * | 2023-08-30 | 2023-09-29 | 吴江市天富金属制品有限公司 | Body-building equipment chassis stretch forming device and forming process |
| CN116809751B (en) * | 2023-08-30 | 2023-11-21 | 吴江市天富金属制品有限公司 | Body-building equipment chassis stretch forming device and forming process |
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| Publication number | Publication date |
|---|---|
| CN103978085B (en) | 2016-01-20 |
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