CN102463316B - Finishing die mold structure for stainless steel die forging - Google Patents
Finishing die mold structure for stainless steel die forging Download PDFInfo
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- CN102463316B CN102463316B CN201010546348.2A CN201010546348A CN102463316B CN 102463316 B CN102463316 B CN 102463316B CN 201010546348 A CN201010546348 A CN 201010546348A CN 102463316 B CN102463316 B CN 102463316B
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Abstract
The invention relates to a mold structure for processing a die forging. The finishing die mold structure for the stainless steel die forging comprises a finish-forging forming mold and a trimming mold, wherein a finish forging is provided with upper and lower demoulding slopes and a bonding surface formed by the upper and lower demoulding slopes; flash grooves on upper and lower die parting surfaces of the finish-forging forming mold shifts towards an upper side or a lower side on the bonding surface of the demoulding slopes of the finish forging; the length of a contour line on a shallower side of a shifted cavity is less than that of a contour line on the other side of the shifted cavity; the length of the contour line comprises orthogonal lengths of the cavity in two directions and the total peripheral length of the contour line; and the shape and the size of a lower die contour line of the trimming mold is equal to those of the contour line on a deeper side of the shifted cavity of the finish-forging forming mold. Processes and materials are not increased at all; and due to the adoption of technical requirements of the mold structure in terms of mold design, the aims of fine processing of forging processes and energy conservation can be fulfilled.
Description
Technical field
The present invention relates to a kind of mould structure and trimming technology of forging part processing, specifically relate to finisher mould structure and the trimming technology of stainless steel-like forging part.
Background technology
Stainless steel forging part is because it has higher corrosion resistance, be widely used, be usually used in manufacturing in the parts such as the housing of gas, liquid detecting instrument mechanism, though shape is uncomplicated, but mechanical property, the pressure bearing, certainly also very high to the requirement of the presentation quality of this forging especially trimming quality: require otch smooth, without burr crackle, burr zone of fracture and burr, in stainless steel forging part forging process, finish-forging and trimming technology belong to exigent operation.
At present, axial length is 95～150mm, diameter or width are the medium and small shape stainless steel-like parts of 60～110mm, such as the instrument part trans-corporation of many process gas, liquid detecting instrument in the world and the many parts of robot all adopt 316 and 316L stainless steel forgings, market demand is very large, therefore in its processing technology of process of manufacture, slightly do to change, quality slightly improves, and cost is in a slight decrease will produce great market clout and economic benefits.But stainless steel needs to carry out forging burr after forging, trimming polishes in a large number, and workload is very large, and brings a large amount of dust, work under bad environment, bring harm to an operation person.
The prior art of the processing technology of stainless steel forging part is first circular stainless steel bar to be blocked into blank, heating, ejection, blocking, finish-forging, trimming, shaping both at home and abroad.This technique is that the good blank of ejection is placed in blocker, and then, along with the descending of blocking patrix exerted pressure to blank gradually, blank by just crowded and the counter die cavity of clamp-oning counterdie and patrix, forms product forging through finish-forging, trimming, shaping respectively.
But, due to the forging characteristic of stainless steel material: thermal conductivity is low, plasticity is low, viscosity is large, easy sticking to mould, cause die life very low, especially the finish-forging patrix life-span lower, the size at upper die orifice flash gutters place more easily becomes large, die life is generally below 1000, cause that burr on later process trimming forging crack, the defect such as zone of fracture and burr, affect forging surface quality.
Traditional stainless steel finisher mould is the same with other carbon steel forging, the die cavity flash gutters size of upper and lower mould is the same, the length, the width dimensions that are upper and lower die orifice flash gutters place part die cavity are in the same size, and the distribution of forging flash is also the half that horizontal parting face center upper and lower mould respectively accounts for flash thickness.The many data of this process are all the same, in China Machine Press, publish, forging and stamping association of Chinese Mechanical Engineering Society compiles the 624th page of " finish impression " part of the < < forging and stamping handbook > > first volume and has done to discuss and introduce.
Stainless steel trimming technology mode is also the same with carbon steel forging, has two kinds of methods.One is to adopt hot trimming, conventionally should by finish-forging counterdie die joint shape, carry out trimming being not less than at 800 ℃ of temperature, another kind of employing cold-trim(ming), conventionally carry out at normal temperatures trimming, because forging shape differs, dimensional contraction differs, trimming cut burr is larger, brings polishing amount larger, and manufacturing enterprise does not generally all adopt cold-trim(ming).
But, under the mould structure condition of prior art, if use hot trimming method, due to the trimming of stainless steel forgings need to be more much bigger than other carbon steel forging shearing force, more easily cause the first half of forging in drift, form jumping-up and distortion, burr place plucking, tear and produce the burr being attached on the forging first half.And if the method for employing cold-trim(ming) also will inevitably cause trimming place plucking and tear.So use these two kinds of mode trimmings all must with the method for postorder polishing remove produce burr place plucking, tear and burr, otherwise can after the solution treatment of postorder and Passivation Treatment, produce rust staining causes product defective, can cause simultaneously produce turnover period long, cost is high, presentation quality is poor, the artificial polishing of burr is also unsatisfactory, forging surface irregularity, therefore, this area wishes further ameliorative measure.
Summary of the invention
The object of this invention is to provide a kind of stainless steel forgings hot trimming that can solve and easily cause trimming place plucking, tear and produce the burr being attached on forging; Cold-trim(ming) causes trimming place plucking and the problem of tearing, and has saved postorder abrasive material expense simultaneously, shortens production life cycle, has improved a kind of stainless steel forging part finisher mould structure of product appearance quality.
Object of the present invention is realized by following technical scheme:
A finisher mould structure for stainless steel-like forging part, comprises finish-forging shaping dies and shaving die;
The draw taper having a down dip on finish-forging forging has, and the faying face of upper and lower draw taper formation, is characterized in that:
The flash gutters of the upper and lower mould die joint of finish-forging shaping dies is to the faying face of finish-forging forging demoulding gradient, and a lateral deviation is moved up or down;
After skew, the shoal outline line length of a side die cavity of depth of cavity is less than opposite side;
Described outline line length means and comprises the length of the orthogonal both direction of die cavity and total outline line perimeter length;
The counterdie outline line shape of described shaving die, size, get depth of cavity after finish-forging shaping dies skew and deepen die cavity outline line shape, the size of a side.
Further, the flash gutters of the upper and lower mould die joint of described finish-forging shaping dies equals the thickness of 1/2nd flash gutters to the distance of the faying face skew of finish-forging forging demoulding gradient.
Further, the flash gutters of described finish-forging shaping dies is moved to the lateral deviation in patrix or counterdie, and after skew, the shoal orthogonal length of die cavity of a side of depth of cavity is less than opposite side 0.5～0.9mm.
Further, described flash gutters thickness is 2～5mm.
Further, the flash gutters of described finish-forging shaping dies is moved to counterdie one lateral deviation.
Further, described shaving die trimming temperature range is 580～600 ℃.
As finish-forging forging, in order stamping die to be to have the draw taper tilting to forging central authorities from upper and lower mould, the inclined plane of upper and lower draw taper has formed a faying face.As prior art, the overlap of forging die is to be symmetrically located at faying face place, and the thickness of overlap is arranged in the both sides of faying face symmetrically.But, in Xia road trimming operation, the trimming upper and lower mould profile of upper and lower symmetrical size shape size, the first half of forging in drift, form jumping-up and distortion, overlap place plucking, tear and produce viscous, be attached to the circle of one on the forging first half and form viscous mass burr, need to carry out again grinding process, take a lot of work, time-consuming, affect surface accuracy.
Adopt the present invention, by upper and lower mould according to the mould structure of described regulation, the overlap of finish-forging forging is offseted to one side, because the faying face of finish-forging forging demoulding gradient does not become, after the position of overlap offsets to one side, cause the shoal outline line length of a side die cavity of depth of cavity to diminish, it is large that opposite side outline line length becomes.
When entering next step trimming operation, " the counterdie outline line shape of described shaving die, size, get depth of cavity after finish-forging shaping dies skew and deepen the die cavity outline line shape of a side, size, " namely outline line length become a large side in counterdie, when punching and edge-cutting, the first half of forging forms jumping-up and distortion in drift, the plucking at overlap place, tear and produce viscous, being attached to one on forging first half circle forms viscous mass burr and has just filled up in the dimensional space that patrix one circle diminishes, when patrix continues to move down, the viscous mass burr of this circle is by complete, extruding glossily, wrap up in and be attached to finish-forging forging periphery, finished product no longer needs polishing just can reach smooth, appearance attractive in appearance.
Superiority of the present invention and beneficial effect, this stainless steel finisher mould structure is compared with trimming technology with traditional stainless steel finisher mould with trimming technology, has following creativeness and advance:
Stainless steel finish-forging finishing die mould structure of the present invention has changed the same structure of die cavity overlap place size of the finisher upper and lower mould of traditional handicraft, the substitute is die orifice flash gutters place on finish-forging is shaped directly makes by hot forging size, on a side mold of finish-forging finishing die, so just make the hot forging length at this side form mouth flash gutters place of finish-forging die, width dimensions less than the size at finish-forging patrix opposite side die orifice flash gutters place whole flash thickness size distribution of offsets.
After finish-forging shaping dies being offset during trimming, the finish-forging forging that depth of cavity deepens a side shaping contacts with the die cavity of trimming upper punch, in the time of so just can having offset due to trimming, trimming upper punch presses down the outside enlargement deformation of the hot forging first half, particularly at hot forging first half overlap place, reduce jumping-up and bring drastic deformation, thereby obviously improve trimming quality.
This finisher mould structure has thoroughly solved stainless steel forgings hot trimming and has easily caused trimming place plucking, tears and produced the burr being attached on forging; Cold-trim(ming) causes trimming place plucking and tears; All must remove the plucking that produces, tear and burr by the method for postorder polishing, otherwise can produce rust staining after the solid solution pickling of postorder, cause product defective; Can cause the problem that the production cycle is long, cost is high, presentation quality is poor simultaneously, greatly save follow-up hacking, remove the machining period of overlap, product appearance quality improves greatly.
In trimming operation, adopting on the architecture basics of aforementioned finish-forging shaping dies, stainless steel trimming temperature of the present invention can reduce greatly, scope is 580～600 ℃, than conventional temperature, be not less than 800 ℃ of trimming temperature low 200 ℃, reduce trimming distortion, saved the energy, through check mechanical performance, metallographic structure etc., meet product requirement.
The present invention does not increase any operation, material, just on Design of Dies, adopts technical requirement of the present invention, just reaches and realized the retrofit of Forging Technology, energy-conservation again.
Accompanying drawing explanation
Fig. 1 is the forging front view that prior art finish-forging shaping dies processes, and can find out that overlap is symmetrically located at demoulding faying face central authorities;
Fig. 2 is the forging front view that finish-forging shaping dies of the present invention processes, and can tell overlap and depart from forging demoulding faying face, and overlap is upwards offset;
Fig. 3 is the structural representation of the finish-forging shaping dies of prior art stainless steel-like forging part, and finish-forging shaping upper and lower mould die orifice flash gutters is consistent with demoulding faying face;
Fig. 4 is an embodiment of the finisher mould structure of stainless steel-like forging part of the present invention, the wherein structural representation of finish-forging shaping dies, finish-forging shaping upper and lower mould die orifice flash gutters upwards departs from demoulding faying face, in figure, can show: in upper model cavity, L length shortens, and the degree of depth also shoals.
Fig. 5 is the trimming status architecture schematic diagram of prior art stainless steel-like forging part shaving die, after right side is trimming, before left side is trimming;
Fig. 6 is an embodiment of the finisher mould structure of stainless steel-like forging part of the present invention, and wherein shaving die trimming status architecture schematic diagram, after right side is trimming, before left side is trimming;
Fig. 7 is the enlarged drawing at H position in Fig. 5, can find out trimming place plucking, tears and produce the burr being attached on forging;
Fig. 8 is the enlarged drawing at G position in Fig. 6, can find out that trimming place attaches thing and not only tails off, and is closely squeezed in forging periphery, presents round and smooth appearance.
In figure, L is the length of finish-forging forging faying face, b is the flash thickness of finish-forging forging, H is the degree of depth of model cavity on prior art finish-forging forging, h is the degree of depth of prior art finish-forging forging counterdie die cavity, H+h+b is the total height of finish-forging forging, and H-b/2 is the degree of depth of model cavity on finish-forging forging of the present invention, and h+b/2 is the degree of depth of finish-forging forging counterdie die cavity of the present invention.
The specific embodiment
Below contrast accompanying drawing, the present invention is elaborated.
A finisher mould structure for stainless steel-like forging part, comprises finish-forging shaping dies and shaving die;
The draw taper having a down dip on finish-forging forging has, and the faying face of upper and lower draw taper formation,
The flash gutters of the upper and lower mould die joint of finish-forging shaping dies is to the faying face of finish-forging forging demoulding gradient, and a lateral deviation is moved up or down;
After skew, the shoal outline line length of a side die cavity of depth of cavity is less than opposite side;
Described outline line length means and comprises the length of the orthogonal both direction of die cavity and total outline line perimeter length;
The counterdie outline line shape of described shaving die, size, get depth of cavity after finish-forging shaping dies skew and deepen die cavity outline line shape, the size of a side.
The flash gutters of the upper and lower mould die joint of described finish-forging shaping dies equals the thickness of 1/2nd flash gutters to the distance of the faying face skew of finish-forging forging demoulding gradient.With calculation and test, the distance of skew is got the thickness of 1/2nd flash gutters and is advisable.
The flash gutters of described finish-forging shaping dies is moved to the lateral deviation in patrix or counterdie, and after skew, the shoal orthogonal length of die cavity of a side of depth of cavity is less than opposite side 0.5～0.9mm.Most of product is adopting in the processing of technical solution of the present invention, suitable to be of a size of within the scope of this, obtains better effects.
Described flash gutters thickness is 2～5mm.This is normally used size.
The flash gutters of described finish-forging shaping dies is moved to counterdie one lateral deviation.During common trimming operation, patrix moves downward, forging is stressed large, easily mushrooming deformation, in order to reduce trimming distortion, allow patrix in trimming operation put into the less forging of outline line length of the more shallow side die cavity of the degree of depth, therefore, when being shaped, finish-forging allow the flash gutters of finish-forging shaping dies move to counterdie one lateral deviation, the profile length of forging in counterdie is diminished, then the forging after being shaped is stood up upward, patrix punching press in favourable trimming when trimming, thick to forging the first half pier, extruding, obtain good forging final finished, also extended the life-span of finish-forging shaping patrix.
Described shaving die trimming temperature range is 580～600 ℃.Through a large amount of tests, the forging that adopts finish-forging finishing die of the present invention to be shaped, when trimming, reduces trimming distortion, and can reduce trimming temperature requirement, favourable energy-conservation.
Claims (6)
1. a finisher mould structure for stainless steel-like forging part, comprises finish-forging shaping dies and shaving die;
The draw taper having a down dip on finish-forging forging has, and the faying face of upper and lower draw taper formation, is characterized in that:
The flash gutters of the upper and lower mould die joint of finish-forging shaping dies is to the faying face of finish-forging forging demoulding gradient, and a lateral deviation is moved up or down;
After skew, the shoal outline line length of a side die cavity of depth of cavity is less than opposite side;
Described outline line length means and comprises the length of the orthogonal both direction of die cavity and total outline line perimeter length;
The counterdie outline line shape of described shaving die, size, get depth of cavity after finish-forging shaping dies skew and deepen die cavity outline line shape, the size of a side.
2. the finisher mould structure of stainless steel-like forging part according to claim 1, is characterized in that the flash gutters of the upper and lower mould die joint of described finish-forging shaping dies equals the thickness of 1/2nd flash gutters to the distance of the faying face skew of finish-forging forging demoulding gradient.
3. the finisher mould structure of stainless steel-like forging part according to claim 1; the flash gutters that it is characterized in that described finish-forging shaping dies is moved to the lateral deviation in patrix or counterdie, and after skew, the shoal orthogonal length of die cavity of a side of depth of cavity is less than opposite side 0.5～0.9mm.
4. the finisher mould structure of stainless steel-like forging part according to claim 1, is characterized in that described flash gutters thickness is 2～5mm.
5. the finisher mould structure of stainless steel-like forging part according to claim 1, is characterized in that the flash gutters of described finish-forging shaping dies is moved to counterdie one lateral deviation.
6. the finisher mould structure of stainless steel-like forging part according to claim 1, is characterized in that described shaving die trimming temperature range is 580～600 ℃.
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| CN201010546348.2A CN102463316B (en) | 2010-11-16 | 2010-11-16 | Finishing die mold structure for stainless steel die forging |
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| CN103042145B (en) * | 2012-12-25 | 2016-04-13 | 国营第六一六厂 | Spanner precision die forging forming technology |
| CN103640691A (en) * | 2013-12-09 | 2014-03-19 | 无锡透平叶片有限公司 | Titanium alloy rocker die forging structure |
| CN104923703A (en) * | 2015-06-29 | 2015-09-23 | 金世金属制品（吴江）有限公司 | Finish forging die used for reducing trimming burrs of flat forge piece |
| CN110695286B (en) * | 2019-11-01 | 2024-07-05 | 中铁宝桥集团有限公司 | Double-station die forging forming die and forming method for high manganese steel frog insert |
| CN111590004B (en) * | 2020-05-26 | 2022-01-11 | 江苏龙城精锻集团有限公司 | Manufacturing process for manufacturing integral stainless steel oil rail forging |
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| JP2003266138A (en) * | 2002-03-15 | 2003-09-24 | Mineyama Tekkosho:Kk | Forging with hole, and method and device for forging the same |
| JP2006312978A (en) * | 2005-05-09 | 2006-11-16 | Aichi Steel Works Ltd | Con'rod manufacturing method |
| JP5180749B2 (en) * | 2008-09-11 | 2013-04-10 | 株式会社神戸製鋼所 | Trimming apparatus and trimming method |
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| FR532873A (en) * | 1920-06-09 | 1922-02-14 | Usines G Derihon | Stamping process |
| GB160392A (en) * | 1920-06-28 | 1921-03-24 | Usines G Derihon | Improved method of stamping or forging metallic articles |
| CN201333492Y (en) * | 2008-12-19 | 2009-10-28 | 云南西仪工业股份有限公司 | Bridge optimized structure of forging die |
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Effective date of registration: 20191210 Address after: 213311 No.5, Junrong Road, industrial concentration zone, Daitou Town, Liyang City, Changzhou City, Jiangsu Province Patentee after: Jiangsu Nanyang Zhongjing science and Technology Co., Ltd. Address before: 201414, 508, Yong Cun road, Tsing Fengxian District Town, Shanghai Patentee before: Shanghai JD Chukyo Forging & Stamping Co., Ltd. |