CN117718424A - Forging method of annular forging and auxiliary tool - Google Patents
Forging method of annular forging and auxiliary tool Download PDFInfo
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- CN117718424A CN117718424A CN202311809013.9A CN202311809013A CN117718424A CN 117718424 A CN117718424 A CN 117718424A CN 202311809013 A CN202311809013 A CN 202311809013A CN 117718424 A CN117718424 A CN 117718424A
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- 238000005242 forging Methods 0.000 title claims abstract description 114
- 238000000034 method Methods 0.000 title claims abstract description 72
- 238000004080 punching Methods 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 230000008901 benefit Effects 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 4
- 238000005204 segregation Methods 0.000 abstract description 4
- 230000000052 comparative effect Effects 0.000 description 8
- 239000000306 component Substances 0.000 description 3
- 239000008358 core component Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000265 homogenisation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Abstract
The invention provides a forging method of an annular forging piece and a split auxiliary tool. The auxiliary tool is used for assisting in forging the annular forging; the auxiliary fixture is a split fixture and comprises a conical punch, a T-shaped drawing Ma Bang, at least 1 concave upsetting ring, at least 1 convex upsetting ring and an upper pier head of the hydraulic machine. Compared with conventional equipment, the auxiliary tool provided by the invention has the advantages of simple structure adjustment, low manufacturing cost and flexible use, and each component in the auxiliary tool is designed in an independent and split manner; the forging method adopts a mode of local upsetting and drawing to solve the problem of insufficient pressure in the whole forging process, greatly changes the index requirement of equipment, solves the problems of segregation, looseness and uneven structure of a material core, and reduces the pressure and tonnage required by the equipment.
Description
Technical Field
The invention belongs to the technical field of annular forgings, relates to a forging method of an annular forgings, and particularly relates to a forging method of an annular forgings with large wall thickness and a split auxiliary tool.
Background
The forging means a work or a blank obtained by forging and deforming a metal blank.
With the continuous development of human science and technology level, the largest overall ring shape in the world can reach 15.6 meters, and the weight of the stainless steel reaches 150T. The application field of the large annular forging is very wide, and the large annular forging relates to the weapon equipment industry, the wind power tower flange industry, the shield machine connecting flange industry, the mining mechanical equipment industry, the petrochemical industry and the marine industry; these industry products have large dimensions, wide wall thickness cross sections, heavy weights, and low heights.
CN 115608892a discloses a forging method of an annular forging, which comprises the following steps: one or more of chamfer angles and annular grooves are arranged on the outer circle surface and the inner circle surface of the annular forging piece, and the chamfer angles or the annular grooves are formed by rolling during annular forging; forging is carried out by adopting a hydraulic press during forging.
Hydraulic presses are mechanical devices that use hydraulic pressure to transfer force, the main working principle of which is based on pascal's law. The hydraulic press is used for applying a certain pressure to the forging process in the forging process, so that the forging process is ensured to be carried out stably; meanwhile, the cast structure inside the metal is improved to reach the required shape and size. At present, the hydraulic press adopts an integral fixed design, has a simple structure and a clear working principle. The upper pier head of the hydraulic press moves back and forth up and down, and the manipulator clamps the forging piece to move back and forth. And performing a plurality of upsetting and pulling steps.
In summary, the common hydraulic machine has limited travel, low hydraulic speed and constant hydraulic pressure; the pressure required is greater for products with high mass requirements and large wall thickness cross sections; pressure equipment of more than ten thousand tons can be generally found, and the production cost and the period are increased intangibly.
Therefore, there is a need to provide a forging method of an annular forging to solve the above technical problems.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a forging method of an annular forging piece and an auxiliary tool. The split tooling is adopted to assist in forging the annular forging, so that the manufacturing period can be shortened, the pressure of required large-scale hydraulic equipment can be reduced, and the cost can be reduced; the operation is simple, and the maintenance and the replacement are easy; the method provided by the invention has an obvious production effect on large-sized wall thickness forgings.
To achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the invention provides an auxiliary tool, which is characterized in that the auxiliary tool is used for assisting in forging an annular forging;
the auxiliary fixture is a split fixture and comprises a frustum-shaped punch, a T-shaped drawing Ma Bang, at least 1 concave upsetting ring, at least one convex upsetting ring and an upper pier head of the hydraulic machine.
Compared with conventional equipment, the auxiliary tool provided by the invention has the advantages of simple structure adjustment, low manufacturing cost and flexible use, and each component in the auxiliary tool is independently designed in a split mode.
As a preferable embodiment of the present invention, the frustum-shaped punch is used for punching an annular blank.
Preferably, the T-shaped drawing Ma Bang is used for drawing the annular blank and assisting upsetting.
Preferably, the concave upsetting ring and the convex upsetting ring are used for producing annular blanks of different heights for adjustment in upsetting.
Preferably, the upper pier head of the hydraulic press is used for providing pressure for forging.
As a preferable technical scheme of the invention, the T-shaped drawing horse bar comprises a cross beam and a stand column.
Preferably, the upright post is vertically and fixedly arranged at the center of the cross beam.
Preferably, the length of the upright and the cross beam is related to the structural size of the product and the distance between two sides of the horse frame.
Preferably, the maximum outer diameter of the frustum-shaped punch is not smaller than the diameter of the column.
Preferably, the concave upsetting ring comprises a cylinder provided with a through hole.
Preferably, a concave groove coaxial with the through hole is arranged above the through hole of the concave upsetting ring.
Preferably, the male upsetting ring comprises a cylinder provided with a through hole.
Preferably, a convex groove coaxial with the through hole is arranged above the through hole of the convex upsetting ring.
As a preferable technical scheme of the invention, the diameters of the through holes of the concave upsetting rings and the convex upsetting rings are the same as the diameters of the upright posts.
Preferably, the inner diameter of the concave groove is the same as the inner diameter of the convex groove.
Preferably, the depth of the concave groove is 70-80 mm, for example, 70mm, 72mm, 74mm, 76mm, 78mm or 80mm, but the present invention is not limited to the values listed, and other values not listed in the numerical range are equally applicable.
Preferably, the depth of the convex groove is 60-70 mm, for example, 60mm, 62mm, 64mm, 66mm, 68mm or 70mm, but the convex groove is not limited to the recited values, and other non-recited values in the numerical range are equally applicable.
In a second aspect, the invention provides a forging method of an annular forging, wherein the forging method is performed by adopting the auxiliary tool provided in the first aspect.
As a preferred embodiment of the present invention, the forging method includes the steps of:
(1) Sequentially carrying out hydraulic upsetting and hydraulic drawing on the annular blank along the axial direction to obtain a blank;
(2) Punching the blank obtained in the step (1) by adopting a frustum-shaped punch, and then drawing out the blank by utilizing a T-shaped drawing out Ma Bang and a pier head on a hydraulic press;
(3) The concave upsetting ring is used for primary upsetting, and then the convex upsetting ring is used for secondary upsetting.
In a preferred embodiment of the present invention, the hydraulic upsetting deformation in the step (1) is 50 to 60%, for example, 50%, 52%, 54%, 56%, 58% or 60%, but not limited to the values listed, and other values not listed in the numerical range are equally applicable.
Preferably, the hydraulic upsetting ratio in step (1) is 1.8-2.0, and may be, for example, 1.8, 1.84, 1.88, 1.92, 1.96 or 2.0, but is not limited to the recited values, and other values not recited in the numerical range are equally applicable.
Preferably, the hydraulic upsetting pass in step (1) is 2 to 4, for example 2, 3 or 4.
Preferably, the deformation amount of the hydraulic drawing in the step (1) is 40-50%, for example, 40%, 42%, 44%, 46%, 48% or 50%, but not limited to the recited values, and other values not recited in the numerical range are equally applicable.
Preferably, the ratio of the hydraulic elongation in the step (1) is 1.6-1.8, for example, 1.6, 1.62, 1.64, 1.68, 1.7, 1.72, 1.74, 1.76, 1.78 or 1.8, but not limited to the recited values, and other values not recited in the numerical range are equally applicable.
Preferably, the hydraulic drawing passes in step (1) are 2 to 4, for example, 2, 3 or 4.
As a preferred embodiment of the present invention, the drawing in step (2) includes: and placing the punched blank on an upright post of a T-shaped drawing horse bar, and drawing the blank by adopting an upper pier head of a hydraulic press.
Preferably, the elongation deformation is 50 to 60%, for example, 50%, 52%, 54%, 56%, 58% or 60%, but not limited to the recited values, and other values not recited in the numerical range are equally applicable.
Preferably, the elongation ratio of the elongation is 1.8-2.0, for example, 1.8, 1.84, 1.88, 1.92, 1.96 or 2.0, but not limited to the recited values, and other values not recited in the numerical range are equally applicable.
Preferably, the method further comprises turning the elongated blank of step (2) so that the cross beam is parallel to the ground.
As a preferred embodiment of the present invention, the primary upsetting in step (3) includes: and (3) placing the concave upsetting ring on the blank along the upright post, and upsetting the blank by adopting an upper pier head of a hydraulic press.
Preferably, the deformation amount of the primary upsetting is 40-50%, for example, 40%, 42%, 44%, 46%, 48% or 50%, but not limited to the recited values, and other non-recited values in the numerical range are equally applicable.
Preferably, the one-shot upsetting has a upsetting ratio of 1.6 to 1.8, and may be, for example, 1.6, 1.62, 1.64, 1.66, 1.68, 1.7, 1.72, 1.74, 1.76, 1.78 or 1.8, but is not limited to the recited values, other non-recited values within the numerical range are equally applicable,
preferably, the cumulative upsetting ratio of the primary upsetting is 1.8 to 2.0.
Preferably, the secondary upsetting of step (3) comprises: placing the convex upsetting ring above the concave upsetting ring along the upright post, upsetting the blank by adopting an upper pier head of a hydraulic press; wherein the concave groove and the convex groove are aligned;
preferably, the secondary upsetting deformation is 40-50%, for example 40%, 42%, 44%, 46%, 48% or 50%, but not limited to the recited values, and other values not recited in the numerical range are equally applicable.
Preferably, the upsetting ratio of the secondary upsetting is 1.4 to 1.6, and may be, for example, 1.4, 1.42, 1.44, 1.46, 1.48, 1.5, 1.52, 1.54, 1.56, 1.58 or 1.6, but is not limited to the recited values, and other values not recited in the numerical range are equally applicable.
Preferably, the accumulated upsetting ratio of the secondary upsetting is 1.6 to 2.0.
As a preferred embodiment of the present invention, the forging method further includes repeating the steps (2) and (3) at least 2 times, for example, 2 times, 3 times, 4 times, 5 times or 6 times, but not limited to the recited values, and other non-recited values within the range of values are equally applicable.
As a preferred technical solution of the present invention, the forging method of the annular forging provided in the second aspect of the present invention includes the following steps:
(1) Sequentially carrying out hydraulic upsetting and hydraulic drawing on the annular blank along the axial direction to obtain a blank;
wherein the deformation of the upsetting is 50-60%, the upsetting ratio is 1.8-2.0, and the pass is 2-4 times; the deformation of the hydraulic drawing is 40-50%, the drawing ratio is 1.6-1.8, and the number of passes is 2-4;
(2) Punching the blank obtained in the step (1) by adopting a frustum-shaped punch, drawing by utilizing a T-shaped drawing Ma Bang and a pier head on a hydraulic press, and turning over the drawn blank to enable the cross beam to be parallel to the ground;
wherein, the drawing includes: placing the punched blank on an upright post of a T-shaped drawing horse bar, and drawing the blank by adopting an upper pier head of a hydraulic press; the deformation of the drawing is 50-60%, and the drawing ratio is 1.8-2.0;
(3) Performing primary upsetting by using a concave upsetting ring, and performing secondary upsetting by using a convex upsetting ring;
wherein, the primary upsetting comprises: placing the concave upsetting ring on the blank along the upright post, upsetting the blank by adopting an upper pier head of a hydraulic press; the deformation amount of the primary upsetting is 40-50%, the upsetting ratio is 1.6-1.8, and the end point is 1.8-2.0;
the secondary upsetting includes: placing the convex upsetting ring above the concave upsetting ring along the upright post, upsetting the blank by adopting an upper pier head of a hydraulic press; wherein the concave groove and the convex groove are aligned; the deformation amount of the secondary upsetting is 30-40% lower than that of the primary upsetting, the upsetting ratio is 1.4-1.6, and the end point is 1.6-2.0;
(4) Repeating the step (2) and the step (3) at least 2 times.
The numerical ranges recited herein include not only the above-listed point values, but also any point values between the above-listed numerical ranges that are not listed, and are limited in space and for the sake of brevity, the present invention is not intended to be exhaustive of the specific point values that the stated ranges include.
Compared with the prior art, the invention has the following beneficial effects:
(1) Compared with conventional equipment, the auxiliary tool provided by the invention has the advantages of simple structure adjustment, low manufacturing cost and flexible use, and each component in the auxiliary tool is designed in an independent and split manner;
(2) The forging method provided by the invention solves the problems of segregation and uneven structure of the core component of the material, and reduces the pressure and tonnage required by equipment;
(3) The invention adopts a local upsetting mode to solve the problem of insufficient pressure existing in the whole upsetting process, greatly changes the index requirement of equipment and provides powerful data support for the follow-up similar problems;
(4) The forging method provided by the invention has low cost and considerable economic benefit, and can be modified and reused if required by part abrasion, thereby being greatly beneficial to exerting the working limit of equipment and greatly improving the production benefit;
(5) The split tooling is adopted to assist in forging the annular forging, so that the manufacturing period can be shortened, the pressure of required large-scale hydraulic equipment can be reduced, and the cost can be reduced; the operation is simple, and the maintenance and the replacement are easy; the method provided by the invention has an obvious production effect on large-sized wall thickness forgings.
Drawings
Fig. 1a is a schematic structural view of a frustum-shaped punch in an auxiliary tool provided by the invention;
FIG. 1b is a schematic structural view of a T-shaped drawing horse bar in an auxiliary tool provided by the invention;
FIG. 1c is a schematic structural view of a concave upsetting ring in an auxiliary tool provided by the invention;
FIG. 1d is a schematic view of the structure of the male upsetting ring in the auxiliary tool provided by the invention;
FIG. 1e is a schematic structural view of an upper pier head of a hydraulic machine in an auxiliary tool provided by the invention;
FIG. 2 is a process flow diagram of a forging method of an annular forging provided by the invention;
wherein 1 is a frustum-shaped punch, 2 is a T-shaped drawing Ma Bang, 2-1 is a cross beam, 2-2 is a stand column, 3 is a concave upsetting ring, 3-1 is a concave groove, 4 is a convex upsetting ring, 4-1 is a convex groove, and 5 is an upper pier of the hydraulic machine.
Detailed Description
The technical scheme of the invention is further described below by the specific embodiments with reference to the accompanying drawings. It will be apparent to those skilled in the art that the examples are merely to aid in understanding the invention and are not to be construed as a specific limitation thereof.
The invention provides an auxiliary tool, which is a split tool and comprises a frustum-shaped punch 1 shown in fig. 1a, a T-shaped drawing Ma Bang shown in fig. 1b, at least 1 concave upsetting ring 3 shown in fig. 1c, at least one convex upsetting ring 4 shown in fig. 1d and an upper pier head 5 of a hydraulic machine shown in fig. 1 e.
The frustum-shaped punch 1 is used for punching the annular blank; the T-shaped drawing horse bar 2 is used for drawing an annular blank and assisting upsetting; the concave upsetting rings 3 and the convex upsetting rings 4 are used for producing annular blanks with different heights to adjust upsetting; the hydraulic press upper pier head 5 is used for providing pressure for forging.
The T-shaped drawing horse bar 2 comprises a cross beam 2-1 and an upright post 2-2; the upright post 2-2 is vertically and fixedly arranged in the center of the cross beam 2-1; the maximum outer diameter of the frustum-shaped punch head 1 is not smaller than the diameter of the upright post 2-2;
the concave upsetting ring 3 comprises a cylinder provided with a through hole; a concave groove 3-1 coaxial with the through hole is arranged above the through hole of the concave upsetting ring 3;
the convex upsetting ring 4 comprises a cylinder provided with a through hole; a convex groove 4-1 coaxial with the through hole is arranged above the through hole of the convex upsetting ring 4;
the diameters of the through holes of the concave upsetting rings 3 and the convex upsetting rings 4 are the same as the diameters of the upright posts 2-2; the inner diameter of the concave groove 3-1 is the same as the inner diameter of the convex groove 4-1; the depth of the concave groove 3-1 is 70-80 mm; the depth of the convex groove 4-1 is 60-70 mm.
Example 1
The embodiment provides a forging method of an annular forging by adopting an auxiliary tool according to the specific implementation method, wherein the depth of the concave groove 3-1 in the auxiliary tool is 75mm; the depth of the convex groove 4-1 is 65mm.
The flow chart of the forging method of the annular forging is shown in fig. 2, and the forging method of the annular forging comprises the following steps:
(1) Sequentially carrying out hydraulic upsetting and hydraulic drawing on the annular blank along the axial direction to obtain a blank;
wherein the deformation of the upsetting is 55%, the upsetting ratio is 1.9, and the pass is 3 times; the deformation of the hydraulic drawing is 45%, the drawing ratio is 1.7, and the number of passes is 2;
(2) Punching the blank obtained in the step (1) by adopting a conical punch, then drawing by utilizing a T-shaped drawing Ma Bang and a pier head on a hydraulic press, and then turning over the drawn blank to enable the cross beam to be parallel to the ground;
wherein, the drawing includes: placing the punched blank on an upright post of a T-shaped drawing horse bar, and drawing the blank by adopting an upper pier head of a hydraulic press; the deformation of the drawing is 55%, and the drawing ratio is 1.9;
(3) Performing primary upsetting by using a concave upsetting ring, and performing secondary upsetting by using a convex upsetting ring;
wherein, the primary upsetting comprises: placing the concave upsetting ring on the blank along the upright post, upsetting the blank by adopting an upper pier head of a hydraulic press; the deformation of the primary upsetting is 45%, the upsetting ratio is 1.7, and the accumulated upsetting ratio is 1.9;
the secondary upsetting includes: placing the convex upsetting ring above the concave upsetting ring along the upright post, upsetting the blank by adopting an upper pier head of a hydraulic press; wherein the concave groove and the convex groove are aligned; the deformation of the secondary upsetting is 45%, the upsetting ratio is 1.5, and the accumulated upsetting ratio is 1.8;
(4) Repeating the step (2) and the step (3) for 3 times.
Example 2
The embodiment provides a forging method of an annular forging by adopting an auxiliary tool according to the specific implementation method, wherein the depth of the concave groove 3-1 in the auxiliary tool is 70mm; the depth of the convex groove 4-1 is 60mm.
The flow chart of the forging method of the annular forging is shown in fig. 2, and the forging method of the annular forging comprises the following steps:
(1) Sequentially carrying out hydraulic upsetting and hydraulic drawing on the annular blank along the axial direction to obtain a blank;
wherein the deformation of the upsetting is 50%, the upsetting ratio is 1.8, and the number of passes is 2; the deformation of the hydraulic drawing is 40%, the drawing ratio is 1.6, and the number of passes is 3;
(2) Punching the blank obtained in the step (1) by adopting a frustum-shaped punch, drawing by utilizing a T-shaped drawing Ma Bang and a pier head on a hydraulic press, and turning over the drawn blank to enable the cross beam to be parallel to the ground;
wherein, the drawing includes: placing the punched blank on an upright post of a T-shaped drawing horse bar, and drawing the blank by adopting an upper pier head of a hydraulic press; the deformation of the drawing is 50%, and the drawing ratio is 1.8;
(3) Performing primary upsetting by using a concave upsetting ring, and performing secondary upsetting by using a convex upsetting ring;
wherein, the primary upsetting comprises: placing the concave upsetting ring on the blank along the upright post, upsetting the blank by adopting an upper pier head of a hydraulic press; the deformation of the primary upsetting is 40%, the upsetting ratio is 1.6, and the accumulated upsetting ratio is 1.8;
the secondary upsetting includes: placing the convex upsetting ring above the concave upsetting ring along the upright post, upsetting the blank by adopting an upper pier head of a hydraulic press; wherein the concave groove and the convex groove are aligned; the deformation of the secondary upsetting is 40%, the upsetting ratio is 1.4, and the accumulated upsetting ratio is 1.6;
(4) Repeating the step (2) and the step (3) for 4 times.
Example 3
The embodiment provides a forging method of an annular forging by adopting an auxiliary tool according to the specific implementation method, wherein the depth of the concave groove 3-1 in the auxiliary tool is 80mm; the depth of the convex groove 4-1 is 70mm.
The flow chart of the forging method of the annular forging is shown in fig. 2, and the forging method of the annular forging comprises the following steps:
(1) Sequentially carrying out hydraulic upsetting and hydraulic drawing on the annular blank along the axial direction to obtain a blank;
wherein the deformation of the upsetting is 60%, the upsetting ratio is 2.0, and the number of passes is 4; the deformation of the hydraulic drawing is 50%, the drawing ratio is 1.8, and the number of passes is 4;
(2) Punching the blank obtained in the step (1) by adopting a frustum-shaped punch, drawing by utilizing a T-shaped drawing Ma Bang and a pier head on a hydraulic press, and turning over the drawn blank to enable the cross beam to be parallel to the ground;
wherein, the drawing includes: placing the punched blank on an upright post of a T-shaped drawing horse bar, and drawing the blank by adopting an upper pier head of a hydraulic press; the deformation of the drawing is 60%, and the drawing ratio is 2.0;
(3) Performing primary upsetting by using a concave upsetting ring, and performing secondary upsetting by using a convex upsetting ring;
wherein, the primary upsetting comprises: placing the concave upsetting ring on the blank along the upright post, upsetting the blank by adopting an upper pier head of a hydraulic press; the deformation amount of the primary upsetting is 50%, the upsetting ratio is 1.8, and the accumulated upsetting ratio is 2.0;
the secondary upsetting includes: placing the convex upsetting ring above the concave upsetting ring along the upright post, upsetting the blank by adopting an upper pier head of a hydraulic press; wherein the concave groove and the convex groove are aligned; the deformation amount of the secondary upsetting is 50%, the upsetting ratio is 1.6, and the accumulated upsetting ratio is 2.0;
(4) Repeating the step (2) and the step (3) for 2 times.
Example 4
This example provides a forging method of an annular forging, which is the same as example 1.
The auxiliary tool adopted by the forging method is different from that of the embodiment 1 only in that:
in this embodiment, the diameter of the upright post 2-2 of the T-shaped drawing horse bar 2 is adjusted to be smaller than the minimum outer diameter of the conical punch 1.
Compared with the embodiment 1, in the forging method provided by the embodiment, the diameter of the upright post is smaller than the diameter of the punched hole, so that the annular blank cannot be placed in the T-shaped drawn rod 2, namely, clamping and subsequent upsetting processes cannot be performed.
Example 5
This example provides a forging method of an annular forging, which is the same as example 1.
The auxiliary tool adopted by the forging method is different from that of the embodiment 1 only in that:
in the embodiment, the depth of the concave groove 3-1 is adjusted to be 60mm; the depth of the convex groove 4-1 is adjusted to 50mm.
Compared with the embodiment 1, the forging method provided by the embodiment has the advantages that the depth of the concave groove 3-1 and the depth of the convex groove 4-1 are smaller, so that when the convex upsetting ring is placed on the T-shaped drawing horse bar 2, gaps exist between the convex upsetting ring and the concave upsetting ring, the blank is stressed unevenly in the upsetting process, and the phenomena of segregation of the core components and uneven organization of the material are caused.
Comparative example 1
This comparative example provides a forging method of an annular forging using an auxiliary tool as described in the specific embodiment, the method of the forging method of the annular forging differs from that of example 1 only in that:
the present comparative example omits the process of performing one upsetting with the concave upsetting ring in step (3).
Compared with the embodiment 1, the forging method provided by the comparative example directly adopts the convex upsetting ring to perform secondary upsetting, so that the annular forging cannot reach reasonable forging ratio, but the upsetting ring is adopted to perform upsetting, so that the forging is uniformly stressed in the upsetting process, and the surface and structure homogenization conditions of the forging are slightly better than those of the forging by adopting the common method.
Comparative example 2
This comparative example provides a forging method of an annular forging using an auxiliary tool as described in the specific embodiment, the method of the forging method of the annular forging differs from that of example 1 only in that:
the comparative example omits the process of performing secondary upsetting using a male upsetting ring in step (3).
Compared with the embodiment 1, the forging method provided by the comparative example omits a one-time upsetting process, so that the annular forging cannot reach reasonable forging ratio, but the upsetting ring is adopted for upsetting, so that the forging is uniformly stressed in the upsetting process, and the surface and structure homogenization conditions of the forging are slightly better than those of the forging by adopting a common method.
In summary, each component in the auxiliary tool provided by the invention is designed in an independent and split manner, and compared with conventional equipment, the auxiliary tool provided by the invention has the advantages of simple structure adjustment, low manufacturing cost and flexible use; the forging method adopts a local upsetting mode to solve the problem of insufficient pressure in the whole upsetting process, greatly changes the index requirement of equipment, solves the problems of segregation and uneven structure of the core components of the material, and reduces the pressure and tonnage required by the equipment.
The applicant declares that the above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be apparent to those skilled in the art that any changes or substitutions that are easily conceivable within the technical scope of the present invention disclosed by the present invention fall within the scope of the present invention and the disclosure.
Claims (10)
1. An auxiliary tool is characterized in that the auxiliary tool is used for assisting in forging an annular forging;
the auxiliary fixture is a split fixture and comprises a conical punch, a T-shaped drawing Ma Bang, at least 1 concave upsetting ring, at least 1 convex upsetting ring and an upper pier head of the hydraulic machine.
2. The auxiliary tool according to claim 1, wherein the conical punch is used for punching an annular blank;
preferably, the T-shaped drawing Ma Bang is used for drawing and auxiliary upsetting of the annular blank;
preferably, the concave upsetting rings and the convex upsetting rings are used for producing annular blanks with different heights for adjustment during upsetting;
preferably, the upper pier head of the hydraulic press is used for providing pressure for forging.
3. The auxiliary tool according to claim 1 or 2, wherein the T-shaped drawn horse bar comprises a cross beam and a stand column;
preferably, the upright post is vertically and fixedly arranged at the center of the cross beam;
preferably, the maximum outer diameter of the conical punch is not smaller than the diameter of the upright;
preferably, the concave upsetting ring comprises a cylinder provided with a through hole;
preferably, a concave groove coaxial with the through hole is arranged above the through hole of the concave upsetting ring;
preferably, the male upsetting ring comprises a cylinder provided with a through hole;
preferably, a convex groove coaxial with the through hole is arranged above the through hole of the convex upsetting ring.
4. An auxiliary tool according to claim 3, wherein the diameter of the through holes of the concave upsetting rings and the convex upsetting rings is the same as the diameter of the upright post;
preferably, the inner diameter of the concave groove is the same as the inner diameter of the convex groove;
preferably, the depth of the concave groove is 70-80 mm;
preferably, the depth of the convex groove is 60-70 mm.
5. A method of forging an annular forging, wherein the forging is performed using the auxiliary tool according to any one of claims 1 to 4.
6. The forging method as recited in claim 5, wherein the forging method comprises the steps of:
(1) Sequentially carrying out hydraulic upsetting and hydraulic drawing on the annular blank along the axial direction to obtain a blank;
(2) Punching the blank obtained in the step (1) by adopting a frustum-shaped punch, and then drawing out the blank by utilizing a T-shaped drawing out Ma Bang and a pier head on a hydraulic press;
(3) The concave upsetting ring is used for primary upsetting, and then the convex upsetting ring is used for secondary upsetting.
7. The forging method as recited in claim 6, wherein the hydraulic upsetting deformation in the step (1) is 50 to 60%;
preferably, the hydraulic upsetting ratio in the step (1) is 1.8-2.0;
preferably, the hydraulic upsetting pass in the step (1) is 2-4 times;
preferably, the deformation of the hydraulic drawing in the step (1) is 40-50%;
preferably, the hydraulic drawing ratio in the step (1) is 1.6-1.8;
preferably, the hydraulic drawing passes in the step (1) are 2-4 times.
8. The forging method as recited in claim 6 or 7, wherein the drawing in step (2) includes: placing the punched blank on an upright post of a T-shaped drawing horse bar, and drawing the blank by adopting an upper pier head of a hydraulic press;
preferably, the deformation of the elongation is 50-60%;
preferably, the elongation ratio of the elongation is 1.8-2.0;
preferably, the method further comprises turning the elongated blank of step (2) so that the cross beam is parallel to the ground.
9. The forging method as recited in any one of claims 6 to 8, wherein said one-time upsetting in step (3) comprises: placing the concave upsetting ring on the blank along the upright post, upsetting the blank by adopting an upper pier head of a hydraulic press;
preferably, the deformation amount of the primary upsetting is 40-50%;
preferably, the upsetting ratio of the primary upsetting is 1.6-1.8;
preferably, the accumulated upsetting ratio of the primary upsetting is 1.8-2.0;
preferably, the secondary upsetting of step (3) comprises: placing the convex upsetting ring above the concave upsetting ring along the upright post, upsetting the blank by adopting an upper pier head of a hydraulic press; wherein the concave groove and the convex groove are aligned;
preferably, the deformation amount of the secondary upsetting is 40-50%;
preferably, the upsetting ratio of the secondary upsetting is 1.4-1.6;
preferably, the accumulated upsetting ratio of the secondary upsetting is 1.6 to 2.0.
10. The forging method as recited in any one of claims 6 to 9, wherein the forging method further comprises repeating the steps (2) and (3) at least 2 times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311809013.9A CN117718424A (en) | 2023-12-26 | 2023-12-26 | Forging method of annular forging and auxiliary tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311809013.9A CN117718424A (en) | 2023-12-26 | 2023-12-26 | Forging method of annular forging and auxiliary tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117718424A true CN117718424A (en) | 2024-03-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311809013.9A Pending CN117718424A (en) | 2023-12-26 | 2023-12-26 | Forging method of annular forging and auxiliary tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117718424A (en) |
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2023
- 2023-12-26 CN CN202311809013.9A patent/CN117718424A/en active Pending
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