CN109047355B - Profiling process of ultrahigh-strength alloy steel - Google Patents
Profiling process of ultrahigh-strength alloy steel Download PDFInfo
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- CN109047355B CN109047355B CN201810744712.2A CN201810744712A CN109047355B CN 109047355 B CN109047355 B CN 109047355B CN 201810744712 A CN201810744712 A CN 201810744712A CN 109047355 B CN109047355 B CN 109047355B
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 229910000851 Alloy steel Inorganic materials 0.000 title claims abstract description 13
- 230000008569 process Effects 0.000 title claims description 8
- 239000002184 metal Substances 0.000 claims abstract description 14
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 7
- 239000000956 alloy Substances 0.000 claims abstract description 7
- 230000007246 mechanism Effects 0.000 claims abstract description 7
- 238000006073 displacement reaction Methods 0.000 claims abstract description 4
- 238000003825 pressing Methods 0.000 claims description 51
- 238000005096 rolling process Methods 0.000 claims description 16
- 230000007704 transition Effects 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- 230000008859 change Effects 0.000 abstract description 2
- 238000001125 extrusion Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/02—Making uncoated products
- B21C23/03—Making uncoated products by both direct and backward extrusion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C25/00—Profiling tools for metal extruding
- B21C25/02—Dies
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Abstract
The invention discloses a profiling method of ultrahigh-strength alloy steel, which comprises the following steps: (a) designing and assembling a profiling mold structure; (b) preparing an ultra-high strength alloy initial blank; (c) and (6) profiling. Firstly, placing a blank with the initial temperature of 850-1150 ℃ in a cavity of a lower die, placing a second male die on the upper surface of a cover plate after the second male die descends through a lifting chain and passes through an inner hole of an upper clamping ring, and then rapidly driving a second male die to rotate for 60 degrees along a central axis under the rotation of a rotating mechanism so as to enable a flange boss of the second male die to be positioned under the flange boss of the upper clamping ring; and then the first male die descends along with the upper die at the speed of 10-40 mm/s to be in contact with the blank and enable the blank to be subjected to plastic deformation, meanwhile, the second male die limits the upward flowing distance of metal, the metal is forced to flow downwards to fill the cavity, and when the first male die reaches the designed displacement, the blank deformation is finished. The invention can solve the problems of shape change, difficult unloading, folding and the like caused by the profiling reverse acting force, and can be applied to the forming of the blind hole component with local thick wall.
Description
Technical Field
The invention relates to a profiling process of ultrahigh-strength alloy steel.
Background
The blind hole component with the local thick wall generally adopts a forward extrusion upsetting forming method (as shown in figure 1a), the male die is of an integral structure, after the male die is contacted with a blank, the upward flowing speed of head metal is higher than the downward flowing speed of bottom metal, when the downward position of the male die reaches the step position of the female die, the thick wall part metal of the blank flows upward and is separated from the step of the female die, along with the continuous downward movement of the male die, after the thick wall part metal of the blank is contacted with the step surface of the male die, the thick wall part metal begins to flow back downward, the defects of folding and the like are easily generated at the step part contacted with the female die, and the blank is very difficult to be dismounted from a male die slender.
If a backward extrusion upsetting forming method (as shown in figure 1b) is adopted, when the descending position of the punch reaches the step position of the female die in the backward extrusion process, the metal of the thick-wall part of the blank flows upwards and is separated from the step of the female die, and the shape requirement of the component cannot be met.
Disclosure of Invention
The invention aims to provide a profiling process of ultrahigh-strength alloy steel.
A profiling method of ultrahigh-strength alloy steel comprises the following steps: preparing an ultrahigh-strength alloy blank; profiling the blank by using a die;
wherein the die comprises an upper die and a lower die;
the upper die comprises a first male die, the threaded rod part of the first male die is connected with an internal threaded hole of a first male die holder into a whole, the conical part of the first male die holder is installed in a matched manner with an internal conical hole of an upper fixing plate, the large end surface of the first male die holder is contacted with the lower end surface of an upper backing plate, the upper end surface of the upper backing plate is contacted with the lower end surface of an upper die plate, an inner through hole of a second male die is in clearance fit with the outer circle of the first male die, symmetrical hanging rings are installed on the upper surface of the second male die and the lower surface of the;
the lower die comprises a lower die plate, a lower cushion plate is arranged on the upper surface of the lower die plate, a threaded rod part of the ejector rod is connected with the inner threaded hole of the ejector block into a whole, and then the ejector rod is arranged in the central hole of the lower cushion plate and penetrates through the central hole of the lower die plate; the lower sleeve is placed on the step surface of the lower backing plate, the annular plate penetrates through the inner hole of the lower sleeve and is placed on the upper surface of the lower backing plate, the outer surface of the annular plate is in clearance fit with the inner surface of the lower sleeve, the first support cylinder penetrates through the inner hole of the lower sleeve and is placed on the upper surface of the lower backing plate, the outer surface of the first support cylinder is in clearance fit with the inner surfaces of the lower sleeve and the annular plate, the lower pressing ring is placed on the upper surface of the lower sleeve, the lower cushion blocks which are symmetrically distributed penetrate through the positioning through holes of the lower pressing ring and the positioning blind holes of the lower sleeve to realize the circumferential positioning of the lower pressing ring and the lower sleeve, the second supporting cylinder penetrates through the inner hole of the lower pressing ring and is placed on the step surface of the first supporting cylinder to form clearance fit, the positioning blind holes on the lower surface of the upper sleeve are in contact with the upper surface of the lower cushion blocks and are in circumferential fit, the inner surface of the upper sleeve is in clearance fit with the outer circle of the flange of the second supporting cylinder, and the upper sleeve and the lower sleeve are fixedly connected through bolts; the inner surface of the female die II is in interference fit with the outer surface of the prestressed ring II, and the female die II integrally penetrates through the inner hole of the upper sleeve and is placed on the upper surface of the supporting cylinder II; the inner surface of the first prestressed ring and the outer surface of the first female die are installed in an interference fit mode, the prestressed ring and the outer surface of the first female die integrally penetrate through an inner hole of the upper sleeve and are placed on the upper surface of the second female die, the cover plate is placed on the upper surface of the first female die, the upper cushion block is placed in a positioning blind hole in the upper surface of the upper sleeve, the upper pressing ring is placed on the upper surface of the upper cushion block, the pull rods which are symmetrically distributed penetrate through inner holes of the upper pressing ring and the lower pressing ring, the upper pressing ring, the lower pressing ring and the pull rods are connected and fastened through nuts at the upper end and the lower end of the pull rods, and finally the transition rod penetrates through inner holes;
the profiling process comprises the steps that firstly, a blank is placed in a cavity of a lower die, and a male die two-way die is placed on the upper surface of a cover plate after descending through an inner hole of an upper pressing ring through a hanging chain; then under the rotation of the rotating mechanism, the second male die is rapidly driven to rotate by 60 degrees along the central axis, so that the flange boss of the second male die is positioned under the flange boss of the upper pressing ring; the first male die is in contact with the blank along with the descending of the upper die, the blank is subjected to plastic deformation, the distance of the upward flowing metal is limited by the second male die, the downward flowing metal is forced to fill the cavity, and the deformation of the blank is finished after the first male die reaches the designed displacement; then the first male die returns upwards along with the upper die, and the blank falls off from the first male die under the action of the second male die; then under the rotation of the rotating mechanism, the second male die is driven to continue to rotate by 60 degrees along the central axis, so that the flange boss of the second male die is positioned under the flange hole of the upper pressing ring, and the second male die is connected with the upper fixing plate through a hanging chain along with the upward continuous return of the upper die, so that the second male die is separated from the lower die; and then the ejector rod moves upwards to eject the blank out of the lower die cavity through the transition rod, so that the material taking is completed.
The outer part of the male die II is provided with three flange bosses which are symmetrically distributed, the shape of an inner hole of the upper pressing ring is consistent with the appearance of the flange boss of the male die II, three rolling fan rings are arranged on the flange boss of the male die II, and after the upper surface and the lower surface of each rolling fan ring are respectively contacted with the flange boss of the upper pressing ring and the male die II, contact friction is reduced under the action of balls of the rolling fan rings.
The preparation temperature of the ultrahigh-strength alloy blank is 850-1150 ℃.
The forming speed of the ultrahigh-strength alloy is 10-40 mm/s.
The invention provides a profiling method of ultrahigh-strength alloy steel, wherein a male die consists of a first male die and a second male die, the split structure can reduce the deformation resistance of the male die, increase the stability of the first male die, avoid folding, and ensure the forming precision of a blind hole component with a local thick wall by separating a blank from the first male die through the second male die to finish unloading.
Drawings
FIG. 1a is a schematic structural view of a conventional forward extrusion upsetting before and after press forming;
FIG. 1b is a schematic structural view of a conventional reverse extrusion upset before and after profiling;
FIG. 2a is a schematic structural view of a profiling mold before profiling;
FIG. 2b is a schematic structural diagram of the profiling mold after closing;
FIG. 2c is a schematic view of the structure of the profiling mold after profiling;
FIG. 3a is a schematic view of the structure of the upper pressing ring;
FIG. 3b is a cross-sectional view of FIG. 3 a;
FIG. 4a is a schematic structural diagram of a second male die and a rolling fan ring;
FIG. 4b is a cross-sectional view of FIG. 4 a;
FIG. 5a is a schematic view of downward die assembly of a second male die;
FIG. 5b is a cross-sectional view of FIG. 5 a;
FIG. 6a is a schematic diagram of the rotation of the second male die after closing;
FIG. 6b is a cross-sectional view of FIG. 6 a;
FIG. 7a shows blank structure dimensions;
fig. 7b shows the blank dimensions after profiling.
Wherein, 1, an upper template; 2-upper cushion plate; 3, fixing the plate; 4-a convex die holder; 5, first male die; 6-upper sleeve; 7-prestress ring I; 8-first female die; 9-lower sleeve; 10-a first support cylinder; 11-an annular plate; 12-lower backing plate; 13-a lower template; 14-a mandril; 15-a lifting ring; 16-male die two; 17-pressing the ring; 18-upper cushion block; 19-a pull rod; 20-a female die II; 21-a second prestressed ring; 22-lower pressing ring; 23-lower cushion block; 24-a second support cylinder; 25-a transition rod; 26-a top block; 27-a cover plate; 28-rolling fan ring, 29-connecting the rotating device.
Detailed Description
Embodiments of the present invention will be described below with reference to the drawings.
The blank in fig. 2a has a major end with an outer diameter of 384mm, a minor end with an outer diameter of 256mm, an inner hole with a diameter of 184mm, and a total height of 629mm (fig. 7 a). The dimensions of the forged piece after the profiling are shown in FIG. 7 b.
Deformation resistance F borne by the second male die 16 in the compression molding process of the composite materialMeasured in fact1100 tons, the upper clamping ring 17 and the punch II 16 bear the allowable tension and compression stress [ PNoodle]120MPa, then pass
The sum of the contact areas of the upper clamping ring 17 and the three symmetrically distributed rolling fan rings 28 is calculated to be at least 91666.67mm2The contact area with the single rolling fan ring 28 is at least 30555.56mm2. For this purpose, the inner diameter of the rolling fan ring 28 is 640mm, the outer diameter is 860mm, and the single contact area is 43196.956mm2And the design requirements are met.
Meanwhile, the pretension coefficient η of the pull rod 19 is designed to be 1, and the pull-pressure allowable application borne by the pull rod 19 is appliedForce [ P ]Rod]200MPa, and the number n is 6 according to
The diameter of the pull rod is calculated to be at least 108 mm. For this purpose, the diameter of the pull rod 19 is 116mm, and the number of the pull rods is 6, so that the design requirement is met.
The designed die structure is as shown in fig. 2a, the upper die comprises a first male die 5, a threaded rod part of the first male die 5 is connected with an inner threaded hole of a first male die holder 4 into a whole, a conical part of the first male die holder 4 is installed in a matched mode with an inner conical hole of an upper fixing plate 3, a large end face of the first male die holder 4 is in contact with a lower end face of an upper backing plate 2, an upper end face of the upper backing plate 2 is in contact with a lower end face of an upper die plate 1, a through hole in a second male die 16 is in clearance fit with an outer circle of the first male die 5, symmetrical lifting rings 15 are installed on the upper surface of the second male die 16 and the lower surface of the.
The lower die comprises a lower die plate 13, a lower cushion plate 12 is placed on the upper surface of the lower die plate, a threaded rod part of the ejector rod 14 is connected with an internal threaded hole of the ejector block 26 into a whole, and then the ejector rod 14 is placed in a central hole of the lower cushion plate 12 and penetrates through the central hole of the lower die plate 13; the lower sleeve 9 is placed on the step surface of the lower backing plate 12, the annular plate 11 penetrates through the inner hole of the lower sleeve 9 and is placed on the upper surface of the lower backing plate 12, the outer surface of the annular plate 11 is in clearance fit with the inner surface of the lower sleeve 9, the first support cylinder 10 penetrates through the inner hole of the lower sleeve 9 and is placed on the upper surface of the lower backing plate 12, the outer surface of the first support cylinder 10 is in clearance fit with the inner surfaces of the lower sleeve 9 and the annular plate 11, the lower pressing ring 22 is placed on the upper surface of the lower sleeve 9, the symmetrically distributed lower cushion blocks 23 penetrate through the positioning through holes of the lower pressing ring 22 and the positioning blind holes of the lower sleeve 9 to realize the circumferential positioning of the lower pressing ring 22 and the lower sleeve 9, the second support cylinder 24 penetrates through the inner hole of the lower pressing ring 22 and is placed on the step surface of the first support cylinder 10 to form clearance fit, the positioning blind holes of the lower surface of the upper sleeve 6 are in contact with and are in circumferential fit with the upper surface of the lower cushion block 23, the, the upper sleeve 6 and the lower sleeve 9 are fixedly connected through bolts; the inner surface of the female die II 20 is in interference fit with the outer surface of the second prestressed ring 21, and the whole female die II penetrates through the inner hole of the upper sleeve 6 and is placed on the upper surface of the second supporting cylinder 24; the inner surface of the first prestressed ring 7 and the outer surface of the first female die 8 are installed in an interference fit mode, the prestressed ring integrally penetrates through an inner hole of the upper sleeve 6 and is placed on the upper surface of the second female die 20, the cover plate 27 is placed on the upper surface of the first female die 8, the upper cushion block 18 is placed in a positioning blind hole in the upper surface of the upper sleeve 6, the upper pressing ring 17 is placed on the upper surface of the upper cushion block 18, the pull rods 19 which are symmetrically distributed penetrate through inner holes of the upper pressing ring 17 and the lower pressing ring 22, the upper pressing ring 17, the lower pressing ring 22 and the pull rods 19 are connected and fastened at the upper end and the lower end of each pull rod 19 through nuts, and finally the transition rod 25 penetrates through inner holes of the first female die 8, the second female die 20 and the second.
In order to realize the compression and the discharge, the outer part of the second male die 16 (the structure of which is shown in fig. 4a and 4b) is designed to be provided with three flange bosses which are symmetrically distributed, the shape of an inner hole of the upper pressing ring 17 (the structure of which is shown in fig. 3a and 3b) is consistent with the shape of the flange boss of the second male die 16, three rolling fan rings 28 are arranged on the flange boss of the second male die 16, and after the upper surface and the lower surface of the rolling fan rings 28 are respectively contacted with the flange boss of the upper pressing ring 17 and the second male die 16, the contact friction is reduced under the action of the balls of the rolling fan rings 28.
Then, a blank with the initial temperature of 1100 ℃ is placed into the cavity of the lower die in the figure 2a, and the second male die 16 is placed on the upper surface of the cover plate 27 after passing through the inner hole of the upper pressing ring 17 through a sling chain (as shown in figures 5a and 5 b); then under the rotation of the rotating mechanism, the second punch 16 is rapidly driven to rotate 60 degrees along the central axis, so that the flange boss of the second punch 16 is positioned right below the flange boss of the upper pressing ring 17 (as shown in fig. 6a and 6b), and the mold closing is completed (as shown in fig. 2 b).
The first punch 5 then moves down with the upper die at a speed of 30mm/s to contact the blank and plastically deform the blank, while the second punch 16 limits the distance of the metal flow upwards, forcing the metal flow downwards to fill the cavity, and the blank deformation is completed after the first punch 5 has moved 1722mm of displacement (see fig. 2 c).
Then the first male die 5 returns upwards along with the upper die, and the blank falls off from the first male die 5 under the action of the second male die 16; then under the rotation of the rotating mechanism, the second male die 16 is driven to continue to rotate by 60 degrees along the central axis, so that the flange boss of the second male die 16 is positioned right below the flange hole of the upper pressing ring 17, and the second male die 16 is connected with the upper fixing plate 3 through a hanging chain along with the upward continuous return of the upper die, so that the second male die 16 leaves the lower die; the ram 14 then moves upward through the transition rod 25 to eject the billet out of the lower mold cavity to complete the reclaiming.
The molded part is inspected after cooling, the shape is saturated, and the dimensions meet the design requirements of fig. 7 b.
The invention can solve the problems of shape change, difficult unloading and folding caused by the profiling reverse acting force, and can be applied to the forming of the blind hole component with local thick wall.
Claims (6)
1. A profiling method of ultrahigh-strength alloy steel comprises the following steps: preparing an ultra-high strength alloy initial blank; profiling the blank by using a die;
wherein the die comprises an upper die and a lower die;
the upper die comprises a first male die, the threaded rod part of the first male die is connected with an internal threaded hole of a first male die holder into a whole, the conical part of the first male die holder is installed in a matched manner with an internal conical hole of an upper fixing plate, the large end surface of the first male die holder is contacted with the lower end surface of an upper backing plate, the upper end surface of the upper backing plate is contacted with the lower end surface of an upper die plate, an inner through hole of a second male die is in clearance fit with the outer circle of the first male die, symmetrical hanging rings are installed on the upper surface of the second male die and the lower surface of the;
the lower die comprises a lower die plate, a lower cushion plate is arranged on the upper surface of the lower die plate, a threaded rod part of the ejector rod is connected with the inner threaded hole of the ejector block into a whole, and then the ejector rod is arranged in the central hole of the lower cushion plate and penetrates through the central hole of the lower die plate; the lower sleeve is placed on the step surface of the lower backing plate, the annular plate penetrates through the inner hole of the lower sleeve and is placed on the upper surface of the lower backing plate, the outer surface of the annular plate is in clearance fit with the inner surface of the lower sleeve, the first support cylinder penetrates through the inner hole of the lower sleeve and is placed on the upper surface of the lower backing plate, the outer surface of the first support cylinder is in clearance fit with the inner surfaces of the lower sleeve and the annular plate, the lower pressing ring is placed on the upper surface of the lower sleeve, the lower cushion blocks which are symmetrically distributed penetrate through the positioning through holes of the lower pressing ring and the positioning blind holes of the lower sleeve to realize the circumferential positioning of the lower pressing ring and the lower sleeve, the second supporting cylinder penetrates through the inner hole of the lower pressing ring and is placed on the step surface of the first supporting cylinder to form clearance fit, the positioning blind holes on the lower surface of the upper sleeve are in contact with the upper surface of the lower cushion blocks and are in circumferential fit, the inner surface of the upper sleeve is in clearance fit with the outer circle of the flange of the second supporting cylinder, and the upper sleeve and the lower sleeve are fixedly connected through bolts; the inner surface of the female die II is in interference fit with the outer surface of the prestressed ring II, and the female die II integrally penetrates through the inner hole of the upper sleeve and is placed on the upper surface of the supporting cylinder II; the inner surface of the first prestressed ring and the outer surface of the first female die are installed in an interference fit mode, the prestressed ring and the outer surface of the first female die integrally penetrate through an inner hole of the upper sleeve and are placed on the upper surface of the second female die, the cover plate is placed on the upper surface of the first female die, the upper cushion block is placed in a positioning blind hole in the upper surface of the upper sleeve, the upper pressing ring is placed on the upper surface of the upper cushion block, the pull rods which are symmetrically distributed penetrate through inner holes of the upper pressing ring and the lower pressing ring, the upper pressing ring, the lower pressing ring and the pull rods are connected and fastened through nuts at the upper end and the lower end of the pull rods, and finally the transition rod penetrates through inner holes;
the profiling process comprises the steps that firstly, a blank is placed in a cavity of a lower die, and a male die two-way die is placed on the upper surface of a cover plate after descending through an inner hole of an upper pressing ring through a hanging chain; then under the rotation of the rotating mechanism, the second male die is rapidly driven to rotate by 60 degrees along the central axis, so that the flange boss of the second male die is positioned under the flange boss of the upper pressing ring; the first male die is in contact with the blank along with the descending of the upper die, the blank is subjected to plastic deformation, the distance of the upward flowing metal is limited by the second male die, the downward flowing metal is forced to fill the cavity, and the deformation of the blank is finished after the first male die reaches the designed displacement; then the first male die returns upwards along with the upper die, and the blank falls off from the first male die under the action of the second male die; then under the rotation of the rotating mechanism, the second male die is driven to continue to rotate by 60 degrees along the central axis, so that the flange boss of the second male die is positioned under the flange hole of the upper pressing ring, and the second male die is connected with the upper fixing plate through a hanging chain along with the upward continuous return of the upper die, so that the second male die is separated from the lower die; and then the ejector rod moves upwards to eject the blank out of the lower die cavity through the transition rod, so that the material taking is completed.
2. A method for profiling ultra-high strength alloy steel according to claim 1, wherein: the outer part of the male die II is provided with three flange bosses which are symmetrically distributed, the shape of an inner hole of the upper pressing ring is consistent with the appearance of the flange boss of the male die II, three rolling fan rings are arranged on the flange boss of the male die II, and after the upper surface and the lower surface of each rolling fan ring are respectively contacted with the flange boss of the upper pressing ring and the male die II, contact friction is reduced under the action of balls of the rolling fan rings.
3. A method of profiling ultra high strength alloy steel as claimed in claim 2 wherein:
wherein FMeasured in factResistance to deformation, S, borne by the second punchContact withThe sum of the contact areas of the upper pressing ring and three symmetrically distributed rolling fan rings [ PNoodle]And the allowable stress for the pulling and pressing born by the upper pressing ring and the male die II is provided.
4. A method for profiling ultra-high strength alloy steel according to claim 1, wherein:
wherein d isRodDiameter of the pull rod, FMeasured in factThe deformation resistance born by the male die II is η the pretension coefficient of the pull rod, [ PRod]And n is the number of the pull rods which are symmetrically distributed.
5. A method for profiling ultra-high strength alloy steel according to claim 1, wherein: the preparation temperature of the ultra-high strength alloy initial blank is 850-1150 ℃.
6. A method for profiling ultra-high strength alloy steel according to claim 1, wherein: the forming speed of the ultrahigh-strength alloy is 10-40 mm/s.
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| CN201810744712.2A CN109047355B (en) | 2018-07-09 | 2018-07-09 | Profiling process of ultrahigh-strength alloy steel |
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| CN111112364B (en) * | 2019-12-25 | 2022-07-19 | 北京机电研究所有限公司 | Stepped deep hole extrusion process suitable for elastomer deep hole extrusion piece |
| CN111889531B (en) * | 2020-07-13 | 2021-11-05 | 上海交通大学 | Positive and negative extrusion forming die and forming method for curved bus type shell |
| CN113042559B (en) * | 2021-03-16 | 2022-04-15 | 中北大学 | Thinning, stretching and extruding composite forming method for large-height-diameter-ratio cylinder |
| CN113102532B (en) * | 2021-04-14 | 2022-03-25 | 中北大学 | Labor-saving forming method suitable for large-size thin-wall conical shell |
| CN113369325B (en) * | 2021-06-11 | 2022-08-09 | 中国兵器工业第五九研究所 | Extrusion forming process |
| CN113369329B (en) * | 2021-06-11 | 2022-07-15 | 中国兵器工业第五九研究所 | Multifunctional extrusion die with open cavity |
| CN114346149A (en) * | 2021-12-30 | 2022-04-15 | 苏州昆仑重型装备制造有限公司 | Large-scale step barrel forging die |
| CN115283474B (en) * | 2022-10-08 | 2023-01-24 | 中北大学 | Uniform forward extrusion control forming die for high-performance plate blank |
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| JPS5857251B2 (en) * | 1979-05-28 | 1983-12-19 | トヨタ自動車株式会社 | Material holding device for extrusion processing |
| DE3814687A1 (en) * | 1988-04-30 | 1989-11-09 | Krupp Widia Gmbh | EXTRACTION TOOL |
| CN203448424U (en) * | 2013-07-30 | 2014-02-26 | 无锡福镁轻合金科技有限公司 | Porous magnesium alloy tube extrusion die |
| CN203711520U (en) * | 2014-02-24 | 2014-07-16 | 河北科技大学 | Continuous extrusion and automatic demoulding device of deep cylinder workpiece |
| CN203806922U (en) * | 2014-02-28 | 2014-09-03 | 山东兖矿轻合金有限公司 | Aluminium extrusion tool and die lifting appliance |
| CN204122683U (en) * | 2014-08-15 | 2015-01-28 | 宾科汽车紧固件（昆山）有限公司 | A kind of cold-heading module for the manufacture of flange sleeve |
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Effective date of registration: 20240311 Address after: 400039 Chongqing Jiulongpo Yuzhou Road No. 33 Patentee after: Southwest Institute of technology and engineering of China Ordnance Equipment Group Country or region after: China Address before: 400039 Chongqing Jiulongpo Yuzhou Road No. 33 Patentee before: NO 59 Research Institute OF CHINA ORDNACE INDUSTRY Country or region before: China |