CN103978085B - A kind of press-processing method - Google Patents
A kind of press-processing method Download PDFInfo
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- CN103978085B CN103978085B CN201410137971.0A CN201410137971A CN103978085B CN 103978085 B CN103978085 B CN 103978085B CN 201410137971 A CN201410137971 A CN 201410137971A CN 103978085 B CN103978085 B CN 103978085B
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- ldpe film
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- steel plate
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Abstract
The invention discloses a kind of press-processing method, its step is as follows: a ldpe film is laid on the locating table of die by (1); (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, a flanging ring is put, by this plate slab material clamping between this flanging ring and die; (5) punch is placed in above this die, and punching press downwards, this steel plate blank pulls down and is stretched into shape; (6) this punch return is 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.The invention solves obtained end socket and be difficult to cleaning, taking X-ray flaw detection qualification rate is low, the technical problem that after welding, repair rate is high, and structure is simple, with low cost, is widely used in 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 is applied in industrial and mining enterprises' production and product for civilian use manufacture, low-pressure pressure container container, and social required quantity is huge.In recent years, in the steel that my company manufactures, low-pressure pressure container number of units is often average annual increases progressively with 30%, and annual production crosses 20,000.
The traditional cold process for stamping and forming of end socket is: all coat lubricating oil at the upper bottom surface of steel plate blank and contacting dies and bottom surface in advance, carry out punching press, stretch forming.Wherein, doing punching stretch process lubrication with lubricating oil is reduce the frictional resistance of 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, the thinning rough surface that makes strengthens this lubricating method, lubricating oil infiltrates and sticks to surface of steel plate, the lubricating oil of shaping rear head surfaces externally and internally is made thoroughly to remove, end socket group is caused to produce a large amount of dense smoke to lubricating oil heated combustion when welding after circumferential weld, 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, thus 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, it is good to adopt compressed air blasting method to remove to stick to end socket surface and oil contaminant effectiveness comparison, and end socket group is to one-tenth girth joint, and after welding forming, taking X-ray flaw detection qualification rate is improved significantly.But, but this sweep-out method makes overall production cost increase, and production efficiency reduces.
Summary of the invention
Technical problem to be solved by this invention overcomes the deficiencies in the prior art, provides a kind of cold stamping structure, makes the end socket obtained that lubricating oil can be avoided to adhere to, and solves and be difficult to cleaning, the technical problems such as 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, a flanging ring is put, by this plate slab material clamping between this flanging ring and die;
(5) punch is placed in above this die, and punching press downwards, this steel plate blank pulls down and is stretched into shape;
(6) this punch return is 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 is laid on ldpe film on the locating table of this die and this ldpe film be layed on this steel plate blank and is and non-ly returns the ldpe film made of newly cutting into slices.
Particularly, this thickness being laid on the ldpe film on the locating table of this die is 0.020 ~ 0.030mm; The thickness of this ldpe film be layed on this steel plate blank is 0.020 ~ 0.030mm,
Preferably, this thickness being laid on the ldpe film on the locating table of this die is 0.025mm; The thickness of this ldpe film be layed on this steel plate blank is 0.025mm.
Principle of the present invention is: ldpe film be heated 350 DEG C-450 DEG C can cracking, and carbide is produced 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 to utilize LDPE plastic sheeting to replace the lubricant of end socket cold stamping shaping, and LDPE plastic sheeting is layed in respectively upper bottom surface and the bottom surface of steel plate blank.Use end socket of the present invention, after cold stamping is shaped smoothly not there is not defects such as pulling in outward appearance, just be stained with the very thin black carbon compound of one deck at end socket outer surface straight flange position, these black carbon compound cloth gently a foam or adopt gas flame cuttiug head skirt time be easy to thoroughly be removed, cleaning after release seal head forming, sandblasting operation, ensure the welding quality of weld seam, improve weld seam x-ray inspection qualification rate, effectively boost productivity and reduce production cost.
In order to understand technique effect of the present invention more intuitively, distinguish the end socket of actual production same size with the present invention, control group one, control group two, control group three and control group four.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 the upper bottom surface of steel plate blank and bottom surface.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 is used for cold stamping and has good lubricant effect, makes the end socket made 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 obtained end socket and be difficult to cleaning, taking X-ray flaw detection qualification rate is low, the technical problem that after welding, repair rate is high, and structure is simple, with low cost, is widely used in industrial production; 2, because prior art needs to be coated with film lubricating oil on steel plate blank, and letter of the present invention has economized this step, improves production efficiency, increases economic efficiency.
Below in conjunction with drawings and Examples, the invention will be further described.
Accompanying drawing explanation
Fig. 1 of the present inventionly disassembles schematic diagram.
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 top board 611 and base plate 613 respectively.Motor 62 and fuel tank 64 connecting fluid press pump 63 respectively, hydraulic cylinder 67 is located in frame 61, and is connected with hydraulic pump 63 with by petroleum pipeline and oil return pipe, and 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 to 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 for the present invention, its production process is as follows: two ldpe films 50 of cutting in advance, makes often to open ldpe film 50 identical with circular steel plate blank material 40 size; 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, this other circular ldpe film 50 puts 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 punching press downwards of the punch 20 on the hydraulic cylinder 67 of hydraulic press 60, circular steel plate blank material 40 stretch forming downwards, hydraulic cylinder 67 return of hydraulic press 60 is 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 and returned for non-the ldpe film made of newly cutting into slices.Because the new ldpe film that returns of waste and old reclaiming contains impurity, a small amount of grease and particulate mixtures is produced in punching course, so can not select waste and old reclaiming return new ldpe film product, this ldpe film 50 thickness is 0.020 ~ 0.030mm, particularly, this ldpe film 50 thickness is 0.025mm.
Learn through experimental analysis, when punch 20 punching press downwards, 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 surface is now be in anaerobic condition, when steel plate blank 40 continues to stretch downwards due to the mutual friction of contact surface phase, instantaneous high-temperature high pressure is formed on the end socket surface of contact surface, LDPE plastic sheeting is made to 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, end socket is glided shaping smoothly.And these carbide self also have a bit minimum pulling force, ldpe film 50 also last carbonization is described, it and end socket outer surfaces do not produce adhesion, are easily eliminated yet.Eliminate the cleaning of shaping rear head, sandblasting operation, effectively boost productivity and reduce production cost.
Be shaped attractive in appearance with the ellipsoidal head 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 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, do not produce thick smoke when using this end socket to manufacture pressure vessel welding, 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, reduce production cost.
This is made to cost accounting: compared by the end socket that the end socket adopted obtained by the present invention and employing oiliness mineral oil and vegetable oil are shaped obtained by the punching structure that lubricates as cold stamping, x-ray inspection qualification rate improves 25%; In addition, save cleaning or sandblasting greasy dirt expense, to manufacture end socket 40000 calculating every year, save cleaning or sandblasting greasy dirt expense (end socket 40000 × 1.5=60000 unit), save X-ray film and film making expense (film 5000 × 5=25000 unit), save Weld Seam Repairation expense and welding rod expense (reprocessing 5000 places × 10=50000 unit), within 1 year, add up to saving 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 do not depart from the spirit and scope of the present invention to various change of the present invention or modification, if these are changed and modification belongs within claim of the present invention and equivalent technologies scope, then the present invention is also intended to comprise these change and modification.
Claims (4)
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, a flanging ring is put, by this plate slab material clamping between this flanging ring and die;
(5) punch is placed in above this die, and punching press downwards, this steel plate blank pulls down and is stretched into shape;
(6) this punch return is to rising, exits;
Wherein, this is laid on ldpe film on the locating table of this die and this ldpe film be layed on this steel plate blank and is and non-ly returns the ldpe film made of newly cutting into slices.
2. press-processing method as claimed in claim 1, it 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 thickness being laid on the ldpe film on the locating table of this die is 0.020 ~ 0.030mm; The thickness of this ldpe film be layed on this steel plate blank is 0.020 ~ 0.030mm.
4. press-processing method as claimed in claim 3, is characterized in that: this thickness being laid on the ldpe film on the locating table of this die is 0.025mm; The thickness of this ldpe film be layed on this steel plate blank 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 CN103978085A (en) | 2014-08-13 |
| CN103978085B true 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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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108787842B (en) * | 2018-05-25 | 2020-02-21 | 江苏民诺特种设备有限公司 | Special barrel body drawing machine for semi-finished product of liquefied gas tank |
| 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 |
| 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 |
Citations (5)
| 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 |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007005011B4 (en) * | 2007-02-01 | 2012-09-06 | Saeta Gmbh & Co. Kg | Method and drawing tool for deep drawing blanks of sheet metal material to flangeless moldings |
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2014
- 2014-04-08 CN CN201410137971.0A patent/CN103978085B/en active Active
Patent Citations (5)
| 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 |
| 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 |
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| CN103978085A (en) | 2014-08-13 |
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