CN102240760B - Process for ring rolling deep spigot type complex ring-shaped forged piece - Google Patents
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- 238000005096 rolling process Methods 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title abstract description 17
- 238000004080 punching Methods 0.000 claims abstract description 17
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 238000005242 forging Methods 0.000 claims description 114
- 238000005516 engineering process Methods 0.000 claims description 20
- 238000003801 milling Methods 0.000 claims description 14
- 230000000295 complement effect Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 8
- 230000007547 defect Effects 0.000 abstract description 7
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- 229910000831 Steel Inorganic materials 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 238000000465 moulding Methods 0.000 description 6
- 229910001339 C alloy Inorganic materials 0.000 description 4
- 238000009497 press forging Methods 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 239000002994 raw material Substances 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 101100334117 Caenorhabditis elegans fah-1 gene Proteins 0.000 description 1
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- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
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- 238000005098 hot rolling Methods 0.000 description 1
- 238000006049 ring expansion reaction Methods 0.000 description 1
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Abstract
The invention relates to a process for ring rolling a deep spigot type complex ring-shaped forged piece, comprising the following steps of: heating at intermediate frequency, upsetting, blanking, punching the wad, and ring rolling, wherein three stations of upsetting, blanking and punching the wad are completed through one equipment; the process comprises the following steps of: (1), designing a rolled front ring-shaped blank in accordance with the rule of equivalent thickness, equivalent weight and structure copying; and (2), ring rolling: a ring rolling machine is used to stably ring-roll the forged piece through a ring rolling process; and radial layering design is performed on a ring rolling wheel and a core shaft of the ring rolling machine according to a spigot structure of the forged piece, namely the shape of the cavity of the ring rolling wheel is matched with the external circle part of the forged piece structure; and the core shaft comprises the spigot part of the forged part so as to form a closed cavity between the ring rolling wheel and the core shaft. The utilization rate of the material prepared by the process in the invention is improved greatly. Furthermore, the tonnage of blanking equipment is low; product quality is steady; and quality defects like inner hole folding, deformation of the bottom surface of the spigot and the like can be avoided.
Description
Technical field
The invention belongs to annular forging piece forge hot rolling forming field, particularly a kind of dark seam class labyrinth annular forging piece rolling forming technology.
Background technology
The tradition forging mode of domestic dark seam class annular forging piece has 2 kinds at present: a kind of is to adopt the closed-die forging direct forming, technology scope of application outside diameter＜φ 200, in the annular forging piece of hole＜φ 100, its technological process is: heating in medium frequency → jumping-up → closed-die forging shaping → punching the wad.Though the technological process of this mode forging forming is short.But exist following shortcoming: (1) forging diameter over bark is big, with hole size variation in the product, gross weight thickness height, and product material consumption is high.(2) equipment tonnage of forging final forming station is big, the energy consumption height.(3) flatness of dark seam bottom surface often is out of shape because of punching the wad or is produced mass defects such as the degree of depth folds, even can produce the quality risk of scrapping in batches.
Also have another forging mode at present, adopt to meet the technology forging molding.The technology scope of application: ring outside diameter＞φ 200, in the annular forging piece of hole＞φ 100, technological process is: heating in medium frequency → (jumping-up → base → punching the wad, three stations are finished by 1 equipment) → rolling ring expansion shape blank (see figure 1) → closed-die forging → punching the wad.This forging and molding mode, the material consumption is lower though relative the 1st kind of traditional forging mode closed-die forging of material consumption is shaped.But also have following shortcoming: the forging forming technological process is long, though the equipment tonnage of forging final forming station is little, and total energy consumption height, reason is by many forging equipment line combinations.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, the complicated annular forging piece rolling forming of a kind of dark seam class technology is provided.
The technical solution used in the present invention is:
The complicated annular forging piece rolling forming of a kind of dark seam class technology comprises the steps:
Heating in medium frequency → jumping-up → base → punching the wad → rolling forming, wherein jumping-up, base, three stations of punching the wad are finished by 1 equipment, it is characterized in that:
(1) roll over the design of the preceding ring of expansion base:
Roll over the planform design principle of ring base before expanding and follow uniform thickness, Deng heavy, structure profiling principle is (and according to the physical dimension of forging, roll over and expand recently shape and the appearance and size of design ring base) (one), described uniform thickness, then be ring base and forging entity part thickness Deng restitution, volume equates, preferably pass through CAXA, PROE, three-dimensional softwares such as UG come designing and calculating ring base contour structure size, the prerequisite of calculating is to set earlier to roll over to expand ratio, namely determine hole dimension in the ring base, then according to uniform thickness, Deng heavy, structure profiling principle can calculate ring base cylindrical and seam size, finally designs concrete ring base appearance and size.Preferably, hole dimension is determined described referring to table 1 in the ring base, hole dimension is more preferably selected according to the scope of forge weight in the ring base, illustrate, as certain forging cylindrical φ 150, forge weight 2.4kg, forging weight＜5kg, the range of choice of hole dimension should be φ 40～70 in the ring base, as gets φ 53, and the ring base in hole dimension further preferably get every specification limit upper limit according to forge weight, as forge weight 1.45kg, near upper limit 1.5kg, hole dimension can be got near higher limit in scope φ 30～50 in the ring base, as φ 45～50.Rolling over expansion is 1.5～5.5 than selected scope, and preferable range is 1.5～3.5.(2), described structure profiling principle: the planform of rolling over ring base before expanding should be identical with the forging structure or close, i.e. profiling encircles blank structure and should design dark seam shape.(3), the fixing structure fillet of ring base, seam pattern draft should expand than deciding according to ring base and the rolling of forging.Roll over and expand than≤2 o'clock, ring base Front cut＜R3,5 °～15 ° of seam pattern drafts; Roll over and expand than＞2 o'clock, ring base Front cut≤R5～R8,20 °～50 ° of seam pattern drafts.
Hole dimension is selected principle for use in the table one ring base
(2), rolling forming:
Adopt rolling forming technology, adopt Ring Rolling Machine (vertical or horizontal Ring Rolling Machine) to realize the forging rolling forming.Its roll milling wheel, mandrel design should be carried out the radially layered design according to the forging fixing structure, and namely the excircle part of roll milling wheel cavity shape and forging structure is complementary, and the mandrel design comprises forging seam part, thereby forms closed die cavity between roll milling wheel and mandrel.Preferably, Ring Rolling Machine must select for use principle to see Table shown in two:
Table two, vertical Ring Rolling Machine are selected principle for use
When the outside diameter of certain forging and forge weight are not in the same one-level of table two, preferably select vertical Ring Rolling Machine model according to forge weight.As certain forging cylindrical φ 150, forge weight 2.4kg, forging weight＜5kg selects 250 vertical ring rolling machine rolling forming.
The maximum rolling of at present domestic vertical Ring Rolling Machine expanded diameter phi 1000mm, if the outside diameter of forging greater than φ 1000mm, should select horizontal Ring Rolling Machine to realize the forging rolling forming.
The heating in medium frequency that relates in the step of the present invention, jumping-up, punching the wad operation and conventional forging process, mould structure design are identical, do not elaborate at this.
The beneficial effect that the present invention has:
Adopt technology of the present invention to compare with traditional handicraft, the utilization rate of material significantly improves, and the shaping equipment tonnage is low, constant product quality, mass defect such as folding, the seam bottom surface distortion in hole in can not occurring.
Description of drawings
Fig. 1 is the schematic diagram of the annular blank mentioned in the background technology;
Fig. 2 is the forging schematic diagram of the part 1 of making;
Fig. 3 expands preceding ring base schematic diagram for the rolling of making part 1 shown in Figure 2;
Fig. 4 expands the schematic diagram of mould roll milling wheel, mandrel for the rolling of making part 1 shown in Figure 2;
Wherein label 1 is rolling wheel, and label 2 is forging, and label 3 is mandrel.
Fig. 5 is the forging schematic diagram of the part 2 of making;
Fig. 6 expands preceding ring base schematic diagram for the rolling of making part 2 shown in Figure 5;
Fig. 7 expands the schematic diagram of mould roll milling wheel, mandrel for the rolling of making part 2 shown in Figure 5;
Wherein label 4 is rolling wheel, and label 5 is forging, and label 6 is mandrel.
The specific embodiment
The invention will be further described below in conjunction with specific embodiment, but do not limit the present invention.
As shown in Figure 2, part 1, material 20CrMnTi, forge weight 2.4kg, forging excircle dimension and the seam degree of depth are forged tonnage and are calculated according to conventional fly press die forging calculation of pressure formula (calculating referring to forging and pressing handbook fly press forging equipment nominal pressure) P=(17.5～28) KF=495T (KN), (17.5～28) deformation coefficient for forging, the two-sided dark fixing structure distortion of embodiment product gets 28 greatly, K is the steel grade coefficient, K=1 (low-carbon alloy steel), F: the forging projected area, calculate F ≈ 177 by Fig. 2.In view of the double stopper structure of this forging and the forging and molding complexity of dark seam wherein, traditional closed-die forging is shaped needs to adopt 630T friction press or electric screw press.
The conventional forging process flow process:
(350KW) heating in medium frequency → (400kg pneumatic hammer 30kw) jumping-up → (630T friction press or electric screw press 110kw) closed-die forging → (160T gap-framepress 11kw) punching the wad.
Technological process of the present invention:
As shown in Figure 3, roll over expansion preceding ring base excircle dimension and the seam degree of depth and forge tonnage calculating according to conventional fly press die forging calculation of pressure formula (calculating referring to forging and pressing handbook fly press forging equipment nominal pressure) P=(17.5～28) KF ≈ 328T (KN), the deformation coefficient that forges gets 28 equally, K is the steel grade coefficient, K=1 (low-carbon alloy steel), F: forging total deformation area, calculate F ≈ 117 by Fig. 3; Therefore the ring base was shaped and adopts 400T friction press or electric screw press to finish before the present invention rolled over and expands.
Technological process of the present invention: (350KW) (250 vertical Ring Rolling Machine 55kw) expanded in heating in medium frequency → jumping-up → base → punching the wad (jumping-up, base, 3 stations of punching the wad are finished 55kw at the 400T electric screw press) → rolling, can finish this forging rolling forming.Operation behind the forging: heat treatment normalizing → roughing → fine finishining.
(1) roll over the design of the preceding ring of expansion base:
(1), roll over to expand before the planform design of ring base follow uniform thickness, etc. heavy, structure profiling principle, expand ratio according to thickness weight, contour structure size, the rolling of forging, by CAXA three-dimensional software ring base contour structure size.Set earlier to roll over and expand ratio, namely determine hole dimension in the ring base, hole dimension is determined referring to table 1 in the ring base, forging cylindrical φ 150, therefore forge weight 2.4kg＜5kg selects 250 vertical Ring Rolling Machines for use, φ 53 is got according to table 1 in the hole in the ring base, diameter over bark is little, and the forging cutting stock weight is light, meets the selected scope φ 40～70 of diameter over bark.The rolling in hole is expanded than 1.9 in the forging, meets selected scope 1.5～3.5.Before roll over expanding among the embodiment 1 the ring base according to uniform thickness, etc. restitution then, cylindrical thickness, gross thickness, the two-sided seam degree of depth of ring base are identical with forging, can calculate to encircle base appearance and size.
(2), follow structure profiling principle: the planform of rolling over ring base before expanding is identical with the forging structure or close, i.e. profiling, so encircle blank structure and design both ends of the surface seam shape, as shown in Figure 3.
(3), the fixing structure fillet of ring base, seam pattern draft expand than deciding according to ring base and the rolling of forging.Embodiment 1 rolles over and expands than 1.9≤2, therefore respective design rule ring base Front cut＜R3 according to the present invention, 5 ° of seam pattern drafts, then according to uniform thickness, etc. weight, structure profiling principle can calculate and encircle the base cylindrical and the seam size is seen Fig. 3.
(2), rolling forming:
Adopt 250 vertical Ring Rolling Machine rolling formings, the roll milling wheel of embodiment 1, mandrel design consideration forging fixing structure carry out radially layered, the excircle part coupling of roll milling wheel cavity shape and forging structure, the mandrel design comprises the two inner stopper parts of forging, thereby between roll milling wheel and mandrel, form closed die cavity, see Fig. 4.
Adopt the contrast of technology of the present invention and traditional handicraft data:
Can find out that by parameters contrast in the table embodiment 1 adopts technology of the present invention from utilization rate of raw materials, forging forming equipment tonnage, the gross weight weight of ring base, the equipment general power of forging line, part 1 cylindrical sipes can forging and molding etc. the aspect obviously be better than traditional handicraft, and the forging quality of technology of the present invention is stable, mass defect such as folding, the seam bottom surface distortion in hole in can not occurring.The composite construction that adopts technology of the present invention can finish cylindrical sipes, end face seam simultaneously forges, and overcomes the defective that traditional forging and molding mode can't be finished simultaneously.
As shown in Figure 5, part 2, material 20CrMnTi, forge weight 2.6kg, appearance and size and the seam degree of depth are forged tonnage and are calculated according to conventional fly press die forging calculation of pressure formula (calculating referring to forging and pressing handbook fly press forging equipment nominal pressure) P=(17.5～28) KF ≈ 636T (KN), (17.5～28) deformation coefficient for forging, embodiment 2 products are dark fixing structure, distortion is big, therefore getting 28, K is the steel grade coefficient, K=1 (low-carbon alloy steel), F: the forging projected area, calculate F ≈ 227 by Fig. 2.In view of the dark fixing structure forging and molding complexity of this forging, traditional closed-die forging is shaped needs to adopt 630T friction press or electric screw press.
The conventional forging process flow process:
(350KW) heating in medium frequency → (400kg pneumatic hammer 30kw) jumping-up → (630T friction press or electric screw press 110kw) closed-die forging → (100T gap-framepress 7.5kw) punching the wad.
Technological process of the present invention:
As shown in Figure 6, roll over expansion preceding ring base appearance and size and the seam degree of depth and forge tonnage calculating according to conventional fly press die forging calculation of pressure formula (calculating referring to forging and pressing handbook fly press forging equipment nominal pressure) P=(17.5～28) KF ≈ 560T (KN), the deformation coefficient that forges gets 28 equally, K is the steel grade coefficient, K=1 (low-carbon alloy steel), F: forging total deformation area, calculate F ≈ 200 by Fig. 3.Therefore the ring base was shaped and needs to adopt 400T friction press or electric screw press before the present invention rolled over and expands.
Technological process of the present invention:
(350KW) (250 vertical Ring Rolling Machine 55kw) expanded in heating in medium frequency → jumping-up → base → punching the wad (jumping-up, base, 3 stations of punching the wad are finished 55kw at the 400T electric screw press) → rolling, can finish this forging rolling forming.Operation behind the forging: heat treatment normalizing → roughing → fine finishining.
(1) roll over the design of the preceding ring of expansion base:
(1), roll over to expand before the planform design of ring base follow uniform thickness, etc. heavy, structure profiling principle, expand ratio according to thickness weight, contour structure size, the rolling of forging, by CAXA three-dimensional software ring base contour structure size.Set earlier to roll over and expand ratio, namely determine hole dimension in the ring base, hole dimension is determined referring to table 1 in the ring base, forging cylindrical φ 170, therefore forge weight 2.6kg＜5kg selects 250 vertical Ring Rolling Machines for use, φ 43 is got according to table 1 in the hole in the ring base, diameter over bark is little, and the forging cutting stock weight is light, meets the selected scope φ 40～70 of diameter over bark.The rolling in hole is expanded than 1.6 in the forging, meets selected scope 1.5～3.5.Before roll over expanding among the embodiment 2 the ring base according to uniform thickness, etc. restitution then, cylindrical thickness, gross thickness, the seam degree of depth of ring base are identical with forging, can calculate to encircle base appearance and size.
(2), follow structure profiling principle: the planform of rolling over ring base before expanding is identical with the forging structure or close, i.e. Fig. 6 is seen in profiling, so encircle blank structure and design the dark seam shape of small end face.
(3), the fixing structure fillet of ring base, seam pattern draft should expand than deciding according to ring base and the rolling of forging.Embodiment 2 rolles over and expands than 1.6≤2, therefore respective design rule ring base Front cut＜R3 according to the present invention, 5 ° of seam pattern drafts, then according to uniform thickness, etc. weight, structure profiling principle can calculate and encircle the base cylindrical and the seam size is seen Fig. 6.
(2), rolling forming:
Adopt 250 vertical Ring Rolling Machine rolling formings, the roll milling wheel of embodiment 2, mandrel design consideration forging fixing structure carry out radially layered, the excircle part coupling of roll milling wheel cavity shape and forging structure, the mandrel design comprises the dark seam part of forging, thereby between roll milling wheel and mandrel, form closed die cavity, see Fig. 7.
The traditional handicraft forging ' s block dimension:
(1) inner stopper diameter phi 120mm, forging inner stopper easily cause discontented shape mass defect, must be decreased in the φ 110mm.
(2) big excircle dimension also can be because forging factors such as discontented shape mass defect and the big cylindrical thin thickness of forging damage equipment, and the big cylindrical gauge of forging 11mm thickeies to 13-15mm, needs to increase material adjustment according to practical experience, causes the raw materials consumption height.
Technology of the present invention and the contrast of traditional handicraft data:
Can know by parameters contrast in the table and to find out that embodiment 2 adopts technology of the present invention obviously to be better than traditional handicraft from the aspects such as gross weight weight of utilization rate of raw materials, forging forming equipment tonnage, base, and forging quality of the present invention is stable, mass defect such as folding, the seam bottom surface distortion in hole in can not occurring.
The above only is preferred embodiment of the present invention, is not technical scheme of the present invention is done any pro forma restriction.Every foundation technical spirit of the present invention all still belongs in the scope of technical scheme of the present invention any simple modification, equivalent variations and modification that above embodiment does.
Claims (2)
1. the complicated annular forging piece rolling forming of dark seam class technology, it is characterized in that: comprise the steps: heating in medium frequency → jumping-up → base → punching the wad → rolling forming, wherein jumping-up, base, three stations of punching the wad are finished by 1 equipment,
(1), the ring base designs before rolling over expansion: ring blank structure shape design principle is followed uniform thickness before rolling over expansion, Deng heavy, structure profiling principle, (1), described uniform thickness, then be ring base and forging entity part thickness Deng restitution, volume equates, (2), described structure profiling principle: ring blank structure shape should be identical with the forging structure or close before rolling over expansion, it is profiling, the ring blank structure should be designed dark seam shape, (3), roll over and expand preceding ring blank structure fillet, pattern draft should expand than deciding according to ring base and the rolling of forging, roll over and expand than≤2 o'clock, ring base fillet＜R3,5 °～15 ° of pattern drafts; Roll over and expand than＞2 o'clock, ring base fillet≤R5～R8,20 °～50 ° of pattern drafts;
(2), rolling forming: adopt rolling forming technology, utilize Ring Rolling Machine to realize the stable rolling expansion of forging, its roll milling wheel, mandrel design should be carried out the radially layered design according to the forging fixing structure, the excircle part that is roll milling wheel cavity shape and forging structure is complementary, the mandrel design comprises forging seam part, thereby forms closed die cavity between roll milling wheel and mandrel.
2. the complicated annular forging piece rolling forming of a kind of dark seam class according to claim 1 technology, it is characterized in that: described Ring Rolling Machine selects for use principle to be:
If the outside diameter of forging greater than 1000mm, selects for use horizontal Ring Rolling Machine to carry out rolling forming.
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| CN103056256B (en) * | 2013-01-14 | 2015-08-12 | 宁波雄狮机械制造有限公司 | A kind of processing method of belt pulley |
| CN104139279B (en) * | 2014-06-30 | 2016-05-11 | 张家港中环海陆特锻股份有限公司 | The manufacturing process of interior trapezoidal grooved ring shape part |
| CN104226867B (en) * | 2014-09-22 | 2016-02-03 | 蒋建伟 | For the manufacture of the Ring Rolling Machine of complex section annular element |
| CN104475454B (en) * | 2014-11-25 | 2016-04-27 | 张家港中环海陆特锻股份有限公司 | For interior frock of establishing high annular boss ring forging to forge |
| CN106001347A (en) * | 2016-06-30 | 2016-10-12 | 安徽省瑞杰锻造有限责任公司 | Foundation template forging process for inner and outer step forged piece |
| CN110877085A (en) * | 2019-09-30 | 2020-03-13 | 黄石哈特贝尔精密锻造有限公司 | Tower forging cold rolling forming method and die for angular contact bearing |
| CN113680931A (en) * | 2021-08-04 | 2021-11-23 | 武汉理工大学 | Near-net composite rolling forming method for large inner contour abrupt cross-section ring piece |
| CN113618005B (en) * | 2021-08-27 | 2023-12-19 | 四川凯茨阀门制造有限公司 | Three-station quick-change blank making die for main reduction gear blank |
| CN117415259B (en) * | 2023-11-22 | 2024-05-28 | 郑州煤机格林材料科技有限公司 | Forging process for hob hubs of shield tunneling machine |
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| CN1586753A (en) * | 2004-09-21 | 2005-03-02 | 武汉理工大学 | Method for rolling and forming rectangular section aluminium alloy ring piece |
| CN2803564Y (en) * | 2004-08-05 | 2006-08-09 | 瓦房店轴承集团有限责任公司 | Ring rolls |
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| JP4319425B2 (en) * | 2003-02-26 | 2009-08-26 | 本田技研工業株式会社 | Method for producing metal ring for endless metal belt |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2803564Y (en) * | 2004-08-05 | 2006-08-09 | 瓦房店轴承集团有限责任公司 | Ring rolls |
| CN1586753A (en) * | 2004-09-21 | 2005-03-02 | 武汉理工大学 | Method for rolling and forming rectangular section aluminium alloy ring piece |
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Address after: No. 10, North Section of Dongxing Road, International Trade Logistics Park, Jinghai District, Tianjin City, 301600 Patentee after: Tianjin Tianhai Precision Forging Co.,Ltd. Country or region after: Zhong Guo Address before: 301600 North side of Beihua Road, Jinghai Town, Jinghai County, Tianjin City Patentee before: TIANJIN TIANHAI PRECISION FORGING Co.,Ltd. Country or region before: Zhong Guo |