CN219483795U - Large extruder for extruding large-size nickel-based alloy bars - Google Patents
Large extruder for extruding large-size nickel-based alloy bars Download PDFInfo
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- CN219483795U CN219483795U CN202320377961.9U CN202320377961U CN219483795U CN 219483795 U CN219483795 U CN 219483795U CN 202320377961 U CN202320377961 U CN 202320377961U CN 219483795 U CN219483795 U CN 219483795U
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Abstract
The utility model discloses a large-scale extruder for manufacturing large-scale nickel-based alloy bars, and belongs to the technical field of extrusion equipment; the problem of when the extrusion axle of current large-scale extruder is connected with the extrusion pad, the machining degree of difficulty is big, processing cost is high and the operation is difficult to have the bar utilization ratio low and extrude earlier the end quality poor in extrusion process is solved. The large-sized extruder of the present utility model includes an extrusion unit; the extrusion unit comprises an extrusion barrel, an extrusion shaft and a first extrusion gasket; the extrusion shaft and the first extrusion gasket are both arranged in the extrusion cylinder; the extrusion shaft is connected with the first extrusion gasket through a T-shaped bolt; the extrusion end of the extrusion shaft is internally provided with a cylindrical cavity and a cuboid cavity which are mutually communicated; the T-shaped bolt is used for connecting the extrusion shaft and the first extrusion gasket. The extrusion shaft is connected with the first extrusion gasket without a numerical control machine tool and a special cutter, so that the requirement on processing precision is low; in addition, the present utility model can also improve the quality of the first extruded end of the extruded billet.
Description
Technical Field
The utility model relates to the technical field of extrusion equipment, in particular to a connecting method of an extrusion shaft and an extrusion pad.
Background
The extrusion shaft and the extrusion pad in the existing extrusion machine need to be connected, the extrusion shaft and the extrusion pad are closely contacted in the normal extrusion process, the two are mainly in force transmission, when the extrusion shaft retreats after extrusion is finished, the extrusion pad can not smoothly retreat due to flash in the blank extrusion process, at the moment, the connection force transmission is needed between the extrusion shaft and the extrusion pad, for a large-sized extrusion machine for manufacturing large-sized nickel-based alloy bars, the retreating force of the extrusion shaft is up to kiloton or higher, the weight of the extrusion shaft and the weight of the extrusion pad are large, and therefore, a connecting method which is simple, convenient to operate and easy to process are needed to realize the function.
At present, the method adopted by factories is to symmetrically process 4 spiral T-shaped holes on the end face of the extrusion shaft, and screw holes are processed at the corresponding positions of the extrusion pads, and the two screw holes are rotationally connected by bolts. In the use, screw the bolt to the extrusion pad earlier, aim at the T type hole of extrusion axle terminal surface with the bolt again, rise the extrusion axle or reduce the extrusion pad, rotatory extrusion pad after the bolt gets into the extrusion axle terminal surface to realize the connection.
This method has the following problems: (1) The T-shaped hole is difficult to process, the hardness of the extrusion shaft exceeds HRC35, the requirement on the cutter is very high, the cutter is required, the cost is high, the size of the hole is small, a special cutter is required to be deeply processed into the end face, the cutter head is easy to fold in the movable piece, and the cutter head is easy to process and discard; (2) the T-shaped hole processing requires a numerical control machine tool, and the cost is high; (3) Because the bolt diameter is less, extrusion pad and extrusion axle weight are all great, and wherein, the weight of extrusion pad is greater than 1 ton, and the weight of extrusion axle is greater than 10 tons, easily causes to collide with when hoist and mount are connected, thereby causes the bolt to warp and abandons, and the centering degree of difficulty is great, and is high to the operation requirement.
When the existing large-sized extruder is used for extruding large-sized nickel-based superalloy bars, the extrusion end of a blank is generally required to be rounded (the temperature of the rounded part is easy to drop, so that extrusion is difficult), on one hand, a part of expensive raw materials are required to be processed, certain waste is caused, the material utilization rate is reduced, and on the other hand, the machining cost is increased (the machining difficulty of a nickel-based alloy is high), and expensive superalloy is required to be processed; meanwhile, in the extrusion process, the part of the central part of the extruded blank corresponding to the cavity of the extrusion die is in a free state, and the whole strain is smaller, so that the quality of the part is poor, and the part needs to be cut off after extrusion.
Disclosure of Invention
In view of the above analysis, the present utility model aims to provide a method for connecting an extrusion shaft and an extrusion pad, which is used for solving the problems of large machining difficulty, high machining cost, low bar utilization rate and poor quality of a first extrusion end in the extrusion process when the extrusion shaft and the extrusion pad of the existing large-scale extruder are connected.
The aim of the utility model is mainly realized by the following technical scheme:
the utility model provides a large extruder for extruding large-specification nickel-based alloy bars, wherein the diameter of the large-specification nickel-based alloy bars is larger than or equal to phi 500mm; the large extruder includes an extrusion unit; the extrusion unit comprises an extrusion barrel, an extrusion shaft and a first extrusion gasket; the extrusion shaft and the first extrusion gasket are both arranged in the extrusion cylinder; the extrusion shaft is connected with the first extrusion gasket through a T-shaped bolt;
a cylinder cavity and a cuboid cavity which are communicated with each other are arranged in the extrusion end of the extrusion shaft along the axial direction of the extrusion shaft, and the cuboid cavity is arranged at one end adjacent to the first extrusion gasket;
the T-shaped bolt comprises an end head part and a screw part which are mutually connected and vertical, the end head part can be inserted into the cuboid cavity and clamped in the cylinder cavity, and the screw part penetrates through the cuboid cavity and is in threaded connection with the first extrusion gasket;
the weight of the first extrusion gasket is more than or equal to 1 ton, and the weight of the extrusion shaft is more than or equal to 10 tons.
In one possible design, the length direction of the cuboid cavity is the same as the axial direction of the extrusion shaft; the width of the cuboid cavity is larger than the height thereof;
the length of the end part of the T-shaped bolt is smaller than or equal to the width of the cuboid cavity; the length of the end part of the T-shaped bolt is larger than the height of the cuboid cavity; the diameter of the cylinder cavity is larger than or equal to the length of the end part of the T-shaped bolt.
In one possible design, the press unit further comprises a second press washer; the second extrusion gasket is arranged on the end face of the first extrusion end of the forging stock.
In one possible design, the second extrusion pad is a stainless steel extrusion pad.
In one possible design, the thickness h of the second extrusion pad d ＝(50～100)/λ；
Wherein h is d The thickness of the second extrusion gasket is mm; lambda is the extrusion ratio.
In one possible design, the diameter of the second extrusion pad is always equal to the diameter of the forging stock before and after extrusion.
In one possible design, the end of the second extrusion pad remote from the forging stock is provided with an arc, the radius of the arc is 15-150 mm, and the overall finish of the second extrusion pad and the forging stock is better than Ra6.3.
In one possible design, the extrusion unit further comprises a double cone die, the inlet end of which is connected with the outlet end of the extrusion barrel;
the die angle combination of the double cone die is 40-50 degrees and 35-45 degrees, and arc transition is adopted between the die angle and the die angle.
In one possible design, the radius of the arc between the die angle and the die angle is 5-30 mm.
In one possible design, the diameter of the large gauge nickel-base alloy bar stock is greater than or equal to 500mm.
Compared with the prior art, the utility model has at least one of the following beneficial effects:
(1) When the cavity with the cross section of T-shaped formed by the cuboid cavity and the cylindrical cavity is processed, a numerical control machine tool and a special tool are not needed, and the processing can be realized by adopting a common boring machine. The spiral shape is not involved in the processing of the extrusion shaft, so that the processing precision requirement is low; in the prior art, a numerical control machine tool and a special cutter are needed for machining the T-shaped spiral line, and the machining cost is high.
(2) The extrusion shaft is only provided with the T-shaped cavity, strict centering operation is not needed, and the extrusion shaft is particularly suitable for connecting a large-sized extrusion shaft with an extrusion pad. In the prior art, four spiral T-shaped holes are required to be machined on the end face of the extrusion shaft, threaded holes are machined on the extrusion pad, and the four spiral T-shaped holes and the extrusion pad are required to be rotated and butted after being strictly centered.
(3) According to the utility model, the second extrusion gasket is arranged at the first extrusion end of the forging stock, so that the utilization rate of materials can be improved: the extrusion blank does not need to be processed in an arc, so that a large amount of expensive raw materials are saved; the head of the extruded bar is cut off very little, and the utilization rate of the material is improved.
(4) The head quality of the extruded bar stock can be improved: the second extrusion gasket can provide a constraint function for the extrusion end of the extrusion blank in the extrusion process, so that the strain of the part of blank is improved, and the quality of the part of blank is improved. In addition, the second extrusion gasket made of stainless steel is adopted, so that compared with high-temperature alloy, the cost is saved.
In the utility model, the technical schemes can be mutually combined to realize more preferable combination schemes. Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model. The objectives and other advantages of the utility model may be realized and attained by the embodiments of the utility model particularly pointed out in the written description and drawings.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the utility model, like reference numerals being used to refer to like parts throughout the several views.
FIG. 1 is a schematic view of a large extruder;
FIG. 2 is a schematic view of the structure of the extrusion end of the extrusion shaft;
FIG. 3 is a schematic view of the structure of the extrusion end face of the extrusion shaft;
fig. 4 is a schematic structural view of a T-bolt.
Reference numerals:
1-extruding a shaft; 2-extruding the cylinder; 3-a first extrusion gasket; 4-a second extrusion gasket; 5-double cone mold; 6, forging a blank; 7-lifting holes; 8-a cuboid cavity; 9-a cylindrical cavity; 10-end head portion; 11-screw part.
Detailed Description
The following detailed description of preferred embodiments of the utility model is made in connection with the accompanying drawings, which form a part hereof, and together with the description of the embodiments of the utility model, are used to explain the principles of the utility model and are not intended to limit the scope of the utility model.
The utility model provides a large extruder for extruding large-size nickel-base alloy bars, as shown in figures 1 to 4, wherein the diameter of the large-size nickel-base alloy bars is larger than or equal to phi 500mm; the large extruder includes an extrusion unit; the extrusion unit comprises an extrusion cylinder 2, an extrusion shaft 1 and a first extrusion gasket 3; the extrusion shaft 1 and the first extrusion gasket 3 are both arranged in the extrusion cylinder 2; a forging stock 6 is also placed in the extrusion barrel 2, and the forging stock 6 is positioned at one end close to the first extrusion gasket 3; the extrusion shaft 1 is connected with the first extrusion gasket 3 through a T-shaped bolt; a cylinder cavity 9 and a cuboid cavity 8 which are communicated with each other are sequentially arranged in the extrusion end of the extrusion shaft 1 along the axial direction of the extrusion shaft 1, wherein the cuboid cavity 8 is arranged at one end adjacent to the first extrusion gasket 3; the T-shaped bolt comprises an end part 10 and a screw part 11 which are mutually connected and mutually perpendicular, wherein the end part 10 can be inserted into the cuboid cavity 8 and clamped in the cylinder cavity 9, and the screw part 11 penetrates through the cuboid cavity 8 and is in threaded connection with the first extrusion gasket 3.
Specifically, the extrusion end of the extrusion shaft 1 is provided with a cuboid cavity 8 and a cylindrical cavity 9 which are mutually communicated, a screw hole is formed in the end face of the first extrusion gasket 3 adjacent to the extrusion shaft 1, when the extrusion shaft 1 is connected with the first extrusion gasket 3 by using a T-shaped bolt, the end head of the T-shaped bolt is inserted into the cuboid cavity 8 of the extrusion shaft 1 and enters into the cylindrical cavity 9 (the total depth c of the cuboid cavity 8 and the cylindrical cavity 9 along the axial direction of the extrusion shaft 1 is 170 mm), the T-shaped bolt is rotated by 90 degrees, the end head part 10 of the T-shaped bolt is clamped in the cylindrical cavity 9, and then the screw part 11 of the T-shaped bolt is in threaded connection with the screw hole on the first extrusion gasket 3.
In order to ensure that the end head part 10 of the T-shaped bolt can be inserted into the extrusion shaft 1 and clamped in the extrusion shaft 1, the length direction of the cuboid cavity 8 of the utility model is the same as the axial direction of the extrusion shaft 1; the width a of the rectangular cavity 8 is larger than the height d (the width a of the rectangular cavity 8 is 215mm, and the height d is 165 mm); the length of the end part 10 of the T-shaped bolt is smaller than or equal to the width of the cuboid cavity 8; the length of the end part 10 of the T-shaped bolt is longer than the height of the cuboid cavity 8; the diameter of the cylindrical cavity 9 is equal to or greater than the length of the head portion 10 of the T-bolt.
Specifically, since the length of the rectangular cavity 8 is greater than or equal to the length of the end part 10 of the T-shaped bolt, and the length of the end part 10 of the T-shaped bolt is greater than the height of the rectangular cavity 8, the end of the T-shaped bolt can be smoothly inserted into the rectangular cavity 8 on the extrusion shaft 1, and after the end part 10 of the T-shaped bolt passes through the rectangular cavity 8 and enters the cylindrical cavity 9, the T-shaped bolt is rotated by 90 degrees, so that the two ends of the end part 10 of the T-shaped bolt are ensured to be clamped along the height direction of the rectangular cavity 8; the screw part 11 of the T-shaped bolt is in threaded connection with the first extrusion gasket 3, and finally the fixed connection of the extrusion shaft 1 and the first extrusion gasket 3 is realized.
Compared with the prior art, firstly, when the cavity with the T-shaped cross section formed by the cuboid cavity 8 and the cylindrical cavity 9 is processed, a numerical control machine tool and a special tool are not needed, and the processing can be realized by adopting a common boring machine. The spiral shape is not involved in the processing of the extrusion shaft 1, so that the processing precision requirement is low; in the prior art, a numerical control machine tool and a special cutter are needed for machining the T-shaped spiral line, and the machining cost is high.
Secondly, as shown in fig. 2, the extrusion shaft 1 of the present utility model is provided with only one T-shaped cavity, and no strict centering operation is required, thus being particularly suitable for connecting a large extrusion shaft 1 and an extrusion pad. In the prior art, four spiral T-shaped holes are required to be machined on the end face of the extrusion shaft 1, threaded holes are machined on the extrusion pad, and the four spiral T-shaped holes and the extrusion pad are required to be rotated and butted after being strictly centered, and the weight of the extrusion pad is greater than one ton, so that the butting difficulty is high and the operation requirement is high because the weight of the extrusion pad is greater than 10 tons.
Finally, the extrusion shaft 1 of the present utility model is subjected to a greater force, being able to withstand more than 1.93 times the force of the existing T-helix, because: the diameter of the existing T-shaped screw bolt is 54mm, and the total bearing area of 4 bolts is 4 x pi x (54/2) 2 The method comprises the steps of carrying out a first treatment on the surface of the The diameter of the bolt is 150mm, and the total bearing area of the bolt is pi× (150/2) 2 The bearing area ratio of the T-shaped bolt is 1.93 compared with the prior art, the total bearing force of the T-shaped bolt is 1.93 times of that of the prior art according to the consistent material calculation of the bolt, and if the prior art wants to achieve the same bearing force capacity, the diameter of the bolt needs to be increased to 75mm, so that the processing cost of the bolt and the processing difficulty, the processing amount and the processing cost of the T-shaped screw hole are increased.
The sides of the rectangular cavity 8 in the width direction and the sides in the height direction of the extrusion shaft 1 of the present utility model are subjected to arc transition treatment.
In order to facilitate lifting of the extrusion shaft 1, the end surfaces of two ends of the extrusion shaft 1 are provided with a plurality of lifting holes 7, and the depth b of each lifting hole 7 is 100mm; when it is necessary to connect the pressing shaft 1 with the first pressing washer 3, the pressing shaft 1 is lifted up through the lifting hole 7 and is docked with the first pressing washer 3.
The press unit of the utility model further comprises a second press washer 4; the second extrusion washer 4 is provided on the end face of the first extrusion end of the forging stock 6.
Specifically, the utility model sets up the second extrusion gasket 4 in the first extrusion end of forging stock 6, and the second extrusion gasket 4 welds on the terminal surface of the first extrusion end of forging stock 6, sets up the purpose of second extrusion pad: a certain restraining function is provided for the first extrusion end of the forging stock 6, the extrusion and crust breaking force of the forging stock 6 is improved, and the material waste is avoided.
In order to achieve a more uniform deformation of the forging stock 6 during extrusion, the second extrusion pad 4 of the present utility model is a stainless steel extrusion pad. The purpose of adopting stainless steel gasket is: firstly, in the extrusion process, the deformation resistance of the stainless steel gasket is close to that of the nickel-based alloy, so that the deformation uniformity is facilitated; secondly, the second extrusion gasket 4 made of stainless steel and the nickel-based alloy blank are heated together, so that oxidation is less, the same anti-oxidation coating can be adopted, and the convenience of operation is improved; the second pressing pad 4 made of stainless steel has relatively low cost.
The thickness h of the second pressing pad 4 of the present utility model d = (50-100)/λ; wherein h is d Thickness of the second extrusion gasket 4 is mm; lambda is the extrusion ratio. Thickness h of second extrusion gasket 4 d The setting basis of (1) is as follows: if the thickness of the second extrusion gasket 4 is too thin, the constraint effect on the first extrusion end of the forging stock 6 is not strong, the quality of the forging stock cannot be effectively improved, reasonable arc transition is difficult to process, and the improvement effect on the extrusion breaking force is not strong; the second extrusion gasket 4 is too thick to cause the extrusion end of the extrusion blank to be provided with a cap after extrusion,but rather causes waste of material.
It is also emphasized that the diameter of the second extrusion washer 4 is always equal to the diameter of the forging stock 6 before and after extrusion. In addition, one end of the second extrusion gasket 4 far away from the forging stock 6 is provided with an arc, the radius of the arc is 15-150, and the overall finish of the second extrusion gasket 4 and the forging stock 6 is better than Ra6.3.
The purpose of extrusion gasket rounding is three: firstly, in the tapping process after heating before extrusion, the temperature of the part is easy to drop, so that the deformation resistance of the part is increased, the extrusion is not facilitated, and the vehicle is stuffy; secondly, the part is contacted with the glass cushion in the extrusion process, if the temperature is too low, the glass cushion is not melted, so that the friction force is too large, and the vehicle is easy to be closed; thirdly, the extrusion gasket is processed into an arc, so that deformation guiding effect can be formed in the extrusion process, and extrusion shell breaking force is reduced.
It should be noted that the non-circular end of the second squeeze spacer 4 is tightly centered when it is welded to the forging stock 6. After welding, the second extrusion gasket 4 is sprayed with an oxidation-preventing coating along with the forging stock 6. It should be noted that, the welding of the extrusion gasket and the extrusion blank together can ensure that the two can always and firmly maintain the relative position relationship in the operation process before the heating in the furnace, the transferring out of the furnace and the extrusion.
In order to ensure smooth extrusion of the forging stock 6 and generate enough equivalent strain, the extrusion unit of the utility model further comprises a double-cone die 5, wherein the inlet end of the double-cone die 5 is correspondingly connected with the outlet end of the extrusion barrel 2; the die angle combination of the biconical die 5 is 40-50 degrees and 35-45 degrees, and arc transition is adopted between the die angles.
The radius of the arc between the die angles is 5-30 mm; the die angle and the bearing are in arc transition, the radius of the arc is 5-100 mm, and the aim is to maximally ensure the surface quality of the bar stock.
The extrusion ratio is 2 to 2.9 when the large-sized extruder is used for hot extrusion; this is because: on one hand, the diameter of the nickel-based alloy bar stock is phi 500mm or more, and if the large extrusion ratio is adopted for the large-specification nickel-based alloy bar stock, the tonnage of an extruder to be equipped is more than 5 ten thousand tons, even more; in the second aspect, if a large extrusion ratio is adopted, because the stress is very large, the requirement on the strength of the die is very high, the tonnage is required to be very large, and the die is easy to wear and crack, so that the cost is too high; in the third aspect, as the extrusion of the large-size nickel-based alloy bar stock (large-diameter bar stock with the diameter of phi of 500mm and above) has high requirement on the tonnage of a press, the extrusion ratio is smaller in order to reduce the requirement on equipment; in the fourth aspect, the extrusion ratio adopted by the utility model is smaller, but in the extrusion process, the equivalent strain value of the part with the smallest equivalent strain of the bar is still more than 0.6 (when the extrusion ratio is 2, the diameter of the bar after extrusion is 800 mm), so that the requirement of recrystallization can be met; in a fifth aspect, the equivalent strain is greatest near the edges of the bar during extrusion, and is lower the closer to the core.
In the prior art, when high-temperature alloy bars with the diameter of about 300mm are produced, the specifications of the bars are larger, and the required deformation is larger, so that the extrusion ratio is larger and is 4.5-6; the technical principle of the utility model for producing large-specification nickel-based alloy bar by adopting small extrusion ratio (the extrusion ratio is 2-2.9) is as follows: the temperature drop of the edge is larger due to the contact between the edge and the air and the mold in the process of transferring and the process of starting extrusion, but the larger strain in the process of extrusion can also promote the edge to obtain a complete recrystallization structure in the process of finishing recrystallization, the temperature of the center part is basically not lower than the heating temperature even the temperature of the center part can be increased due to deformation heat in the process of extrusion although the equivalent strain is smaller, and the center part can be kept for a period of time in a high temperature section after the extrusion is finished due to the smaller heat conductivity coefficient of the nickel-based alloy, and partial dynamic recrystallization can occur in the position during extrusion and sub-dynamic recrystallization and static recrystallization can occur in the subsequent high temperature, so that energy is consumed instead of energy for promoting grain growth, and the uniform and fine recrystallization structure can be realized in the whole bar.
In summary, the present utility model can improve the utilization rate of the material by providing the second extrusion gasket 4 at the first extrusion end of the forging stock 6: the extrusion blank does not need to be processed in an arc, so that a large amount of expensive raw materials are saved; the head of the extruded bar is cut off very little, and the utilization rate of the material is improved. In addition, the head quality of the extruded bar stock can be improved: the provision of the second extrusion gasket 4 provides a restraining effect on the pre-extrusion end of the extruded billet during extrusion, increasing the strain of that part of the billet and improving its quality. Also, the present utility model saves costs compared to high temperature alloys by using the second extrusion pad 4 of stainless steel.
The present utility model is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present utility model are intended to be included in the scope of the present utility model.
Claims (10)
1. A large extruder for extruding large-sized nickel-based alloy bars, characterized in that the diameter of the large-sized nickel-based alloy bars is greater than or equal to phi 500mm;
comprises an extrusion unit; the extrusion unit comprises an extrusion barrel, an extrusion shaft and a first extrusion gasket; the extrusion shaft and the first extrusion gasket are both arranged in the extrusion cylinder; the extrusion shaft is connected with the first extrusion gasket through a T-shaped bolt;
a cylinder cavity and a cuboid cavity which are mutually communicated are arranged in the extrusion end of the extrusion shaft along the axial direction of the extrusion shaft, and the cuboid cavity is arranged at one end adjacent to the first extrusion gasket;
the T-shaped bolt comprises an end head part and a screw part which are mutually connected and vertical, the end head part can be inserted into the cuboid cavity and clamped in the cylinder cavity, and the screw part penetrates through the cuboid cavity and is in threaded connection with the first extrusion gasket;
the weight of the first extrusion gasket is greater than or equal to 1 ton, and the weight of the extrusion shaft is greater than or equal to 10 tons.
2. The large extrusion press for extruding large gauge nickel-base alloy bar stock as recited in claim 1, wherein the length direction of the rectangular cavity is the same as the axial direction of the extrusion shaft; the width of the cuboid cavity is larger than the height of the cuboid cavity;
the length of the end part of the T-shaped bolt is smaller than or equal to the width of the cuboid cavity; the length of the end part of the T-shaped bolt is larger than the height of the cuboid cavity; the diameter of the cylinder cavity is larger than or equal to the length of the end part of the T-shaped bolt.
3. The large extrusion press for extruding large gauge nickel-base alloy bar stock as recited in claim 2, wherein the extrusion unit further comprises a second extrusion pad; the second extrusion gasket is arranged on the end face of the first extrusion end of the forging stock.
4. The large extrusion press for extruding large gauge nickel-base alloy bar stock as recited in claim 3, wherein the second extrusion gasket is a stainless steel extrusion gasket.
5. The large extrusion press for extruding large gauge nickel-base alloy bar stock as recited in claim 4, wherein the thickness h of the second extrusion gasket d ＝(50～100)/λ；
Wherein h is d The thickness of the second extrusion gasket is mm; lambda is the extrusion ratio.
6. The large extrusion press for extruding large gauge nickel-base alloy bar stock as recited in claim 5, wherein the diameter of the second extrusion washer is always equal to the diameter of the forging stock before and after extrusion.
7. The large extrusion press for extruding large nickel base alloy bar stock as recited in claim 6, wherein the end of the second extrusion gasket away from the forging stock is provided with an arc having a radius of 15-150 mm, and the second extrusion gasket and the forging stock have an overall finish superior to ra6.3.
8. The large extrusion press for extruding large gauge nickel-base alloy bar stock as recited in claim 7, wherein the extrusion unit further comprises a double cone die, an inlet end of the double cone die being connected to an outlet end of the extrusion barrel;
the die angle combination of the double cone die is 40-50 degrees and 35-45 degrees, and arc transition is adopted between the die angle and the die angle.
9. The large extrusion press for extruding large nickel-base alloy bar stock as recited in claim 8, wherein the radius of the arc between the die angle and the die angle is 5-30 mm.
10. The large extrusion press for extruding large gauge nickel-base alloy bar stock as recited in any one of claims 1-9, wherein the large gauge nickel-base alloy bar stock has a diameter of 500mm or greater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320377961.9U CN219483795U (en) | 2023-03-03 | 2023-03-03 | Large extruder for extruding large-size nickel-based alloy bars |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320377961.9U CN219483795U (en) | 2023-03-03 | 2023-03-03 | Large extruder for extruding large-size nickel-based alloy bars |
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| CN219483795U true CN219483795U (en) | 2023-08-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117380956A (en) * | 2023-12-08 | 2024-01-12 | 北京钢研高纳科技股份有限公司 | Low-cost high-homogeneity large-specification powder high-temperature alloy bar and hot extrusion method thereof |
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2023
- 2023-03-03 CN CN202320377961.9U patent/CN219483795U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117380956A (en) * | 2023-12-08 | 2024-01-12 | 北京钢研高纳科技股份有限公司 | Low-cost high-homogeneity large-specification powder high-temperature alloy bar and hot extrusion method thereof |
| CN117380956B (en) * | 2023-12-08 | 2024-03-12 | 北京钢研高纳科技股份有限公司 | Low-cost high-homogeneity large-specification powder high-temperature alloy bar and hot extrusion method thereof |
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