CN101733338A - Forming technology of ultra-deep taper thin-wall part - Google Patents
Forming technology of ultra-deep taper thin-wall part Download PDFInfo
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- CN101733338A CN101733338A CN200910250930A CN200910250930A CN101733338A CN 101733338 A CN101733338 A CN 101733338A CN 200910250930 A CN200910250930 A CN 200910250930A CN 200910250930 A CN200910250930 A CN 200910250930A CN 101733338 A CN101733338 A CN 101733338A
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Abstract
The invention provides a forming technology of an ultra-deep taper thin-wall part, comprising the following technological steps of: cupping blanks; attenuating and deeply drawing; cutting; continuously tapering for three times; anaerobically annealing; and continuously tapering to finally obtain the products with the specified shapes, sizes, and the like. The forming technology is characterized by solving the problem of difficult forming of the ultra-deep taper thin-wall part by firstly forming a large-end taper hole and gradually contracting a small-end cylindrical aperture through tapering and combining with anaerobic annealing processing and effectively solving the problem of non-uniform wall thickness of the integral ultra-deep taper thin-wall part due to the partial attenuation of a bottom long filleted corner of a workpiece in the tapering process of the taper thin-wall parts. The invention can complete the forming processing of the ultra-deep taper thin-wall part on a mechanical punching machine, has the production efficiency far higher that that of a common hydraulic press (the production takt time of the mechanical punching machine is more than 25 times per minute, and the production takt time of the common hydraulic press is 2-3 times per minute) and is suitable for match production.
Description
Technical field
The present invention relates to punch forming process, particularly the light sheet ultra-deep taper spare drawing and forming of low-carbon steel material.
Background technology
In the punch designs data relative altitude is called dark Tapered Cup greater than 0.8 (Tapered Cup height ÷ Tapered Cup outside diameter).This part is because deformation extent is big, the pressure of punch only is delivered to the deformed area by a fritter area at blank middle part, thereby produces very big local attenuation, sometimes even make the material drawing crack, so need carry out repeatedly pull and stretch, the shaped article wall unevenness is even, conical surface has obvious impression.And for relative altitude greater than more than 2, sheet metal thickness is less than the ultra-deep taper thin-wall part of 1mm, its punch process deformation extent is bigger, the local attenuation at blank middle part is more serious, wall thickness is evenly poorer, easier drawing crack.Therefore conventional dark Tapered Cup Drawing forming technology can't solve even, the material drawing crack problem of the wall unevenness of ultra-deep taper thin-wall part moulding.
Summary of the invention
The purpose of this invention is to provide a kind of ultra-deep taper thin-wall part contour machining procedure method, solve even, the material drawing crack problem of wall unevenness of ultra-deep taper thin-wall part moulding.
The ultra-deep taper thin-wall part contour machining procedure that the present invention proposes is achieved through the following technical solutions, and concrete process sequence step is as follows:
1) blanking cup.The billot surface of low-carbon steel material coated put into the blanking cup mould that has blank holder behind the lubricating oil and carry out punching press, drawing coefficient (expression workpiece deep-drawing deformation degree) is in 0.48～0.5 (blanking cup back aperture d ÷ blanking diameter D) scope, its bottom, hole fillet r=(d-d1) * 3 ÷ 2;
2) ironing.Surface of the work behind the blanking cup coated put into ironing die behind the lubricating oil and carry out ironing, the ironing back aperture equals the big end internal diameter of finished product bellmouth, and barrel thickness equals the finished product wall thickness, guarantee ironing coefficient (expression workpiece deep-drawing deformation degree) simultaneously in 0.75～0.8 (wall thickness t ' ÷ ironing anterior wall thickness t behind the ironing) scope, bottom fillet r1=(d1-d2)/2;
3) otch.At the lathe upper cut, the workpiece volume is identical with finished-product volume behind the otch, and incision length by volume equates to convert to form, and surplus is 2mm～4mm before the otch; (because sheet material is behind deep-drawing deformation, the oral area out-of-flatness has lug, and referring to Figure of description 2 ironing figure, the about 1mm～2mm of lug height needs excision, therefore need stay the preceding surplus of otch)
4) draw awl continuous three times: the surface of the work behind the otch is coated to put into behind the lubricating oil draw prod cast to carry out first, second and draw awl for the third time, each workpiece deformation position drawing coefficient that stretches is that this draws small end aperture, awl back ÷ pull and stretch front aperture to be controlled at 0.75～0.8, workpiece bellmouth angle is identical with finished product bellmouth angle and big end internal diameter with big end internal diameter, the knuckle size of taper hole small end and cylindrical hole approximates this twice of drawing the awl cylinder aperture, and bottom fillet R value is for drawing the awl front aperture and drawing half of the difference of boring back aperture; Be specially:
(1) once draws awl.Surface of the work behind the otch coated to put into behind the lubricating oil draw prod cast once to draw awl, workpiece deformation position drawing coefficient is in 0.75～0.8 (once drawing awl back small end aperture d2 ÷ attenuation back aperture d1) scope, workpiece bellmouth angle [alpha] is identical with finished product bellmouth angle and big end internal diameter with big end inner diameter d 1, the knuckle size of taper hole small end and cylindrical hole approximates this twice of drawing the awl cylinder aperture, be r2 ' ≈ 2d2, bottom fillet r2=(d1-d2)/2; (draw big end inner diameter d 1 size constancy of bellmouth in the awl process, that is: attenuation back aperture d1=draws the big end inner diameter d 1 of awl back big end inner diameter d 1=finished product bellmouth continuous three times)
(2) secondary draws awl.Draw prod cast to carry out secondary to draw awl with once drawing surface of the work behind the awl to coat to put into behind the lubricating oil, workpiece deformation position drawing coefficient is in 0.75～0.8 (secondary draws awl back small end aperture d3 ÷ once to draw awl back small end aperture d2) scope, workpiece bellmouth angle [alpha] is identical with finished product bellmouth angle and big end internal diameter with big end inner diameter d 1 (drawing big end inner diameter d 1 size constancy of bellmouth in the awl process), the knuckle size of taper hole small end and cylindrical hole approximates this twice of drawing the awl cylinder aperture, be r3 ' ≈ 2d3, bottom fillet r3 '=(d2-d3)/2;
Draw awl (3) three times.Secondary drawn surface of the work behind the awl to coat to put into behind the lubricating oil draw prod cast to carry out three times to draw awl, workpiece deformation position drawing coefficient is (three times draw small end aperture, awl back d4 ÷ secondary to draw awl back small end aperture d3) scope 0.75～0.8, workpiece bellmouth angle [alpha] is identical with finished product bellmouth angle and big end internal diameter with big end inner diameter d 1, the knuckle size of taper hole small end and cylindrical hole approximates this twice of drawing the awl cylinder aperture, be r4 ' ≈ 2d4, bottom fillet r4 '=(d3-d4)/2;
5) anaerobic annealing.With drawing for three times the workpiece behind the awl to put into vacuum drying oven, be heated to 500 ℃～550 ℃, be incubated 1 hour, with coming out of the stove behind the stove cool to room temperature.
6) pull on awl, process conditions control draws awl the same with first, second and third time, up to the shape and size that obtain the product regulation.
Advantage of the present invention:
1. the present invention draws to bore and takes to hold greatly the moulding of taper hole elder generation, the small end cylinder aperture progressively dwindles and in conjunction with middle anaerobic annealing in process, solved the difficult problem of ultra-deep taper thin-wall part moulding.
2. take to draw the preceding workpiece barrel ironing of awl among the present invention, fillet part local attenuation characteristics in workpiece bottom when awl is drawn in the subsequent handling utilization, the small end cylinder aperture is progressively dwindled, workpiece is changed evenly, efficiently solve conical thin-wall member and draw in the awl process because the problem that local attenuation causes whole Tapered Cup wall unevenness to spare is located at oval angle, workpiece bottom.
3. the present invention can finish the ultra-deep taper thin-wall part processing and forming in mechanical press, and (the punch press productive temp: per minute is more than 25 times, common hydraulic press productive temp: per minute 2 times～3 times), be adapted to produce in enormous quantities more than common hydraulic press height for production efficiency.
Description of drawings
Fig. 1-Fig. 8 is the forming technology of ultra-deep taper thin-wall part precedence diagram
Fig. 1 blanking cup → Fig. 2. ironing → Fig. 3. otch → Fig. 4. once draw awl → Fig. 5. secondary draws awl → Fig. 6. draw awl → Fig. 7 three times. draw awl → Fig. 8 four times. draw awl five times
The specific embodiment
Below in conjunction with Fig. 1-Fig. 8 this technical process is described:
1, blanking cup.Put into the blanking cup mould that has blank holder after the 10 steel bar material surfaces of thickness t=0.7mm are coated lubricating oil (trichloro-ethylene C12=CHC1 diluent and SH150 moulding oil was prepared by 1: 5), carry out punching out with 400kN open type punch press, blanking dimension D=Ф 88mm, workpiece is the cylindrical member that has the end after the punching out, its inner diameter d=Ф 45mm, height h=34mm, bottom fillet r=6mm, thickness of workpiece t=0.7mm.
2, ironing.Workpiece behind the blanking cup is put into ironing die, carry out punching out with 400kN open type punch press, ironing back aperture d1=Ф 35.5mm is identical with the big end internal diameter of finished product bellmouth, barrel is that t '=0.55mm equals finished product wall thickness t '=0.55mm by the t=0.7mm attenuation, bottom thickness t=0.7mm, bottom fillet r1=R5mm, the about h1=45mm of total height;
3, otch.At C616A engine lathe upper cut, the workpiece volume is identical with finished-product volume behind the otch, workpiece total height h1 '=41mm behind the otch.
4, once draw awl.Surface of the work behind the otch coated to put into behind the lubricating oil once draw prod cast, carry out punching out with 400kN open type punch press, once draw awl back small end aperture d2=Ф 26.9mm, the barrel thickness t '=0.55mm, bottom thickness t=0.7mm, workpiece bellmouth angle [alpha]=19 ° and big end inner diameter d 1=Ф 35.5mm are with finished product bellmouth angle and hold internal diameter identical greatly, the knuckle r2 '=R50mm of taper hole small end and cylindrical hole, bottom fillet r2=R3.5mm, the about h2=58.5mm of total height;
5, secondary draws awl.Draw prod cast with once drawing surface of the work behind the awl to coat to put into secondary behind the lubricating oil, carry out punching out with 400kN open type punch press, secondary draws awl back small end aperture d3=Ф 19.9mm, the barrel thickness t '=0.55mm, bottom thickness t=0.7mm, workpiece bellmouth angle [alpha]=19 ° and big end inner diameter d 1=Ф 35.5mm are with finished product bellmouth angle and hold internal diameter identical greatly, the knuckle r3 '=R40mm of taper hole small end and cylindrical hole, bottom fillet r3=R1.95mm, the about h3=69mm of total height;
6, draw awl three times.Secondary drawn surface of the work behind the awl to coat to put into three times behind the lubricating oil draw prod cast, carry out punching out with 400kN open type punch press, draw awl back small end aperture d4=Ф 14.9mm for three times, the barrel thickness t '=0.55mm, bottom thickness t=0.7mm, workpiece bellmouth angle [alpha]=19 ° and big end inner diameter d 1=Ф 35.5mm are with finished product bellmouth angle and hold internal diameter identical greatly, the knuckle r4 '=R30mm of taper hole small end and cylindrical hole, bottom fillet r4=R1.45mm, the about h4=76mm of total height;
7, anaerobic annealing.With drawing for three times the workpiece behind the awl to put into vacuum drying oven, be heated to 500 ℃～550 ℃, be incubated 1 hour, with coming out of the stove behind the stove cool to room temperature.
8, draw awl four times.Draw prod cast with drawing for three times surface of the work behind the awl to coat to put into four times behind the lubricating oil, carry out punching out with 400kN open type punch press, draw awl back small end aperture d5=Ф 10.9mm for four times, the barrel thickness t '=0.55mm, bottom thickness t=0.7mm, workpiece bellmouth angle [alpha]=19 ° and big end inner diameter d 1=Ф 35.5mm are with finished product bellmouth angle and hold internal diameter identical greatly, the knuckle r5 '=R20mm of taper hole small end and cylindrical hole, bottom fillet r5=R1.25mm, the about h5=82mm of total height;
9, draw awl five times.Draw prod cast with drawing for four times surface of the work behind the awl to coat to put into five times behind the lubricating oil, carry out punching out with 400kN open type punch press, drawing awl back small end for five times is spherical Sr6=SR4.2mm, bellmouth angle [alpha]=19 ° and big end inner diameter d 1=Ф 35.5mm, Tapered Cup wall thickness t '=0.55mm, the about h6=85mm of total height.
Claims (1)
1. forming technology of ultra-deep taper thin-wall part, its processing step is as follows:
(1) blanking cup: the billot surface of low-carbon steel material coated put into the blanking cup mould that has blank holder behind the lubricating oil and carry out punching press, the drawing coefficient of expression workpiece deep-drawing deformation degree be blanking cup back aperture d ÷ blanking diameter D 0.48～0.5, its bottom, hole fillet r=(d-d1) * 3 ÷ 2;
(2) ironing: the surface of the work behind the blanking cup coated put into ironing die behind the lubricating oil and carry out ironing, the ironing back aperture equals the big end internal diameter of finished product bellmouth, and barrel thickness equals the finished product wall thickness, guarantee simultaneously the ironing coefficient be behind the ironing wall thickness t ' ÷ ironing anterior wall thickness t in 0.75～0.8 scope, bottom fillet r1=(d1-d2) ÷ 2;
(3) otch: to the workpiece otch, the workpiece volume is identical with finished-product volume behind the otch on lathe, and incision length by volume equates to convert to form, and surplus is 2mm～4mm before the otch;
(4) draw awl continuous three times: the surface of the work behind the otch is coated to put into behind the lubricating oil draw prod cast to carry out first, second and draw awl for the third time, each workpiece deformation position drawing coefficient that stretches is that this draws small end aperture, awl back ÷ pull and stretch front aperture to be controlled at 0.75～0.8, workpiece bellmouth angle is identical with finished product bellmouth angle and big end internal diameter with big end internal diameter, the knuckle size of taper hole small end and cylindrical hole approximates this twice of drawing the awl cylinder aperture, and bottom fillet R value is for drawing the awl front aperture and drawing half of the difference of boring back aperture;
(5) anaerobic annealing: with drawing for three times the workpiece behind the awl to put into vacuum drying oven, be heated to 500 ℃～550 ℃, be incubated 1 hour, with coming out of the stove behind the stove cool to room temperature;
(6) pull on awl, process conditions control draws awl the same with first, second and third time, up to the shape and size that obtain the product regulation.
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| CN200910250930A CN101733338A (en) | 2009-12-21 | 2009-12-21 | Forming technology of ultra-deep taper thin-wall part |
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| CN101934325A (en) * | 2010-08-11 | 2011-01-05 | 吉林江北机械制造有限责任公司 | Tapered part punching method and combined process dimension control device |
| CN103402668A (en) * | 2011-03-10 | 2013-11-20 | 阿兰图姆公司 | Manufacturing method for porous metal-foam cone assembly with high surface area |
| CN103586644A (en) * | 2013-11-25 | 2014-02-19 | 江苏星河阀门有限公司 | Method for machining outer conical precision thin-wall part |
| CN104801940A (en) * | 2015-05-12 | 2015-07-29 | 常州克劳诺斯特种轴承制造有限公司 | Machining method of synchronizer middle ring |
| CN106670740A (en) * | 2016-12-05 | 2017-05-17 | 广东欧珀移动通信有限公司 | Sound cavity structure and preparation method and application thereof |
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| CN111940601A (en) * | 2020-08-19 | 2020-11-17 | 裕钦精密拉深技术(苏州)有限公司 | Guide sleeve multi-station die and using method thereof |
| CN112719011A (en) * | 2020-12-15 | 2021-04-30 | 重庆伟汉汽车部件有限公司 | Forming process for positioning and mounting convex hull on electric control booster shell |
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| CN101934325B (en) * | 2010-08-11 | 2012-10-03 | 吉林江北机械制造有限责任公司 | Tapered part punching method and combined process dimension control device |
| CN101934325A (en) * | 2010-08-11 | 2011-01-05 | 吉林江北机械制造有限责任公司 | Tapered part punching method and combined process dimension control device |
| CN103402668A (en) * | 2011-03-10 | 2013-11-20 | 阿兰图姆公司 | Manufacturing method for porous metal-foam cone assembly with high surface area |
| CN103402668B (en) * | 2011-03-10 | 2015-09-23 | 阿兰图姆公司 | There is the manufacture method of the porous metal foam tapered assemblies of high surface |
| US9296032B2 (en) | 2011-03-10 | 2016-03-29 | Alantum | Method of manufacturing porous metal foam cone assembly having high surface area |
| CN103586644A (en) * | 2013-11-25 | 2014-02-19 | 江苏星河阀门有限公司 | Method for machining outer conical precision thin-wall part |
| CN103586644B (en) * | 2013-11-25 | 2016-08-17 | 江苏星河阀门有限公司 | The processing method of outer conical precision thin-wall part |
| CN104801940A (en) * | 2015-05-12 | 2015-07-29 | 常州克劳诺斯特种轴承制造有限公司 | Machining method of synchronizer middle ring |
| CN106734487A (en) * | 2016-11-29 | 2017-05-31 | 武汉理工大学 | A kind of mutiprogramming design manufacturing process of deep frustum type part |
| CN106670740A (en) * | 2016-12-05 | 2017-05-17 | 广东欧珀移动通信有限公司 | Sound cavity structure and preparation method and application thereof |
| CN106670740B (en) * | 2016-12-05 | 2019-08-23 | Oppo广东移动通信有限公司 | Audio cavity structure and its preparation method and application |
| CN109365633A (en) * | 2018-10-29 | 2019-02-22 | 合肥新沪屏蔽泵有限公司 | A kind of hot water circulating pump stator can light extrusion forming process |
| CN109365633B (en) * | 2018-10-29 | 2020-04-17 | 合肥新沪屏蔽泵有限公司 | Bright extrusion forming process for stator shielding sleeve of hot water circulating pump |
| CN113329830A (en) * | 2019-01-30 | 2021-08-31 | 日本制铁株式会社 | Cylindrical rotating member, method for manufacturing same, and mold |
| CN111151624A (en) * | 2020-01-09 | 2020-05-15 | 贵州永红航空机械有限责任公司 | Flexible forming device and method for sealing cone |
| CN111940601A (en) * | 2020-08-19 | 2020-11-17 | 裕钦精密拉深技术(苏州)有限公司 | Guide sleeve multi-station die and using method thereof |
| CN111940601B (en) * | 2020-08-19 | 2022-06-07 | 裕钦精密拉深技术(苏州)有限公司 | Guide sleeve multi-station die and using method thereof |
| CN112719011A (en) * | 2020-12-15 | 2021-04-30 | 重庆伟汉汽车部件有限公司 | Forming process for positioning and mounting convex hull on electric control booster shell |
| CN113458248A (en) * | 2021-05-07 | 2021-10-01 | 中国科学院金属研究所 | Necking and flaring mixed forming method for conical barrel part with straight barrel |
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Open date: 20100616 |