CN109047392B - Stress homogenization method for high-temperature alloy casing ring forging - Google Patents
Stress homogenization method for high-temperature alloy casing ring forging Download PDFInfo
- Publication number
- CN109047392B CN109047392B CN201811120739.0A CN201811120739A CN109047392B CN 109047392 B CN109047392 B CN 109047392B CN 201811120739 A CN201811120739 A CN 201811120739A CN 109047392 B CN109047392 B CN 109047392B
- Authority
- CN
- China
- Prior art keywords
- temperature alloy
- bulging
- alloy casing
- ring forging
- casing ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
- B21D3/14—Recontouring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Forging (AREA)
Abstract
The invention relates to a stress homogenization method and measurement for a high-temperature alloy casing ring forgingCircumferential length L of high-temperature alloy casing ring forging at maximum ring diameter part and minimum ring diameter part1And L2Obtaining the yield stress sigma and the required strain epsilon of the high-temperature alloy through a material tensile test, manufacturing a bulging die according to the cross section shape and the size of the high-temperature alloy case ring forging, heating the high-temperature alloy case ring forging to be lower than the forging temperature, soaking, then loading the bulging die, and enabling a bulging conical head to downwards run H1Keeping the bulging conical head to return after a period of time, rotating the high-temperature alloy casing ring forging piece for a certain angle around the axis of the high-temperature alloy casing ring forging piece, and then enabling the bulging conical head to be H-shaped1Base-up run H2And keeping for a period of time to ensure that all parts of the high-temperature alloy casing ring forging are in a micro plastic deformation state; and finally, returning the bulging conical head, taking out the high-temperature alloy casing ring forging, and cooling to room temperature. According to the invention, uniform circumferential plastic strain is applied to the high-temperature alloy casing ring forging through the minimum deformation amount, so that the uniform distribution of residual stress is adjusted.
Description
Technical Field
The invention belongs to the field of plastic processing of high-temperature alloy casing ring pieces, and particularly relates to a stress homogenization method for a high-temperature alloy casing ring forging.
Background
The high-temperature alloy casing ring piece is one of key parts of an aeroengine, the cross section of the high-temperature alloy casing ring piece is complex, a ring forging piece with a variable cross section shape is formed by a ring rolling or forging method, and then the casing ring piece is obtained by machining. The residual stress of the casing ring forging is unevenly distributed due to uneven strain and uneven temperature in the rolling or forging process, and the machining precision is affected due to serious deformation caused by the residual stress in the subsequent machining process, so that the precision machining can be continued only by carrying out repeated stress relief and correction on the casing ring forging in the machining process, and the machining period is very long.
In order to facilitate smooth subsequent precision machining, the currently applied methods cannot effectively remove or homogenize the residual stress in the ring forging to a large extent: by adopting a high-temperature annealing stress-removing method, the crystal grains of the ring forging have a tendency of coarsening due to the fact that the temperature is increased to a higher temperature, so that the mechanical performance of the ring forging is reduced; by adopting the vibration destressing method, the strength and the toughness of the high-temperature alloy are far higher than those of the common alloy due to the solid solution strengthening and the precipitation strengthening of the high-temperature alloy, and the eliminated stress value is almost negligible compared with the yield strength of the high-temperature alloy, so the stress homogenization effect is poor.
Therefore, a method for ensuring the stress equalization of the annular forging of the casing is needed to promote and improve the manufacturing efficiency of the high-temperature alloy casing.
Disclosure of Invention
The invention aims to provide a stress homogenizing method for a high-temperature alloy casing ring forging, which applies uniform circumferential plastic strain to the high-temperature alloy casing ring forging through minimum force (minimum deformation) to adjust residual stress distribution, can effectively homogenize the uniformity of each stress along the circumferential direction, can provide the roundness precision of the ring forging, homogenizes the stress distribution of the casing ring forging before machining to reduce machining deformation, and directly improves the machining efficiency of casing parts.
The technical scheme adopted by the invention is as follows:
a stress homogenization method for a high-temperature alloy casing ring forging comprises the following steps: preparing in early stage and measuring the circumferential length L at the maximum ring diameter position of the high-temperature alloy casing ring forging1And a circumferential length L at the minimum ring diameter2Obtaining the yield stress sigma and the required strain epsilon of the high-temperature alloy through a material tensile test, manufacturing a bulging die according to the cross section shape and the size of the high-temperature alloy casing ring forging, wherein the bulging die comprises a plurality of peripheral split parts and a middle bulging conical head, the inner peripheral surfaces of the split parts are smoothly matched with the bulging conical head, the half cone angle of the bulging conical head is theta, the outer peripheral surfaces of the split parts are approximate to the inner peripheral surface of the high-temperature alloy casing ring forging, and all the split parts can be pushed to horizontally move towards the periphery when the bulging conical head moves downwards so as to enable the high-temperature alloy casing ring forging to bulge; specific operation-heating the high-temperature alloy casing ring forging to be lower than forgingAfter uniform heating, the bulging die is mounted, and the bulging conical head moves downwards H1Keeping the bulging conical head to return after a period of time, rotating the high-temperature alloy casing ring forging piece for a certain angle around the axis of the high-temperature alloy casing ring forging piece, and then enabling the bulging conical head to be H-shaped1Base-up run H2Keeping for a period of time, wherein the actual downward total amount H of the bulging cone head is determined by the strain epsilon and the circumferential length L of the maximum ring diameter position of the high-temperature alloy casing ring forging1Determining the half cone angle theta to ensure that all parts of the high-temperature alloy casing ring forging are in a micro plastic deformation state; and finally, returning the bulging conical head, taking out the high-temperature alloy casing ring forging, and cooling to room temperature.
Further, the actual downward amount of the bulging cone head
Further, the expanding cone head runs downwards
Keeping for 1-5 minutes; expanding conical head is then H1Run down on a foundation
Keeping for 15-30 minutes.
Further, when the bulging die is arranged on the high-temperature alloy case annular forging piece, one end of the large ring diameter of the high-temperature alloy case annular forging piece is upward, the bulging conical head is downward operated, the perimeter of the contact position of the bulging die and one end of the large ring diameter of the high-temperature alloy case annular forging piece is measured in real time, and the L-shaped perimeter is achieved1Then, the position is set as the bulging origin.
Further, the method for measuring the size of the high-temperature alloy casing ring forging comprises the following steps: firstly, measuring the circumferential lengths of different axial heights one by using a flexible rule or a rope to obtain the circumferential length L at the position of the maximum ring diameter1And a circumferential length L at the minimum ring diameter2Then converted into the maximum ring diameter
And minimum ring diameter
Further, the bulging die is provided with 12 split parts, after the bulging conical head returns for the first time, the high-temperature alloy casing ring forging is rotated for 15 degrees around the axis of the bulging conical head, and then the bulging conical head is rotated for H degrees1Base-up run H2。
Further, the high-temperature alloy casing ring forging is heated to 0.8 time of the forging temperature and soaked, and then the bulging die is installed.
The invention has the beneficial effects that:
the invention applies uniform circumferential plastic strain to the high-temperature alloy casing ring forging by the minimum force (minimum deformation) to adjust the distribution of residual stress, can effectively homogenize the uniformity of each stress along the circumferential direction, can provide the roundness precision of the ring forging, homogenizes the stress distribution of the casing ring forging before machining to reduce the machining deformation, and directly improves the machining efficiency of casing parts.
Drawings
Fig. 1 is a split mold in an embodiment of the present invention.
In the figure: 1-splitting; 2-bulging conical head; 3-high temperature alloy casing ring forging.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
The present invention will be described in detail with reference to specific examples.
A stress homogenization method for a high-temperature alloy casing ring forging comprises the following steps:
1. considering that the high-temperature alloy casing ring forging 3 has various defects such as ellipse, butterfly and the like in the rolling process of the preorder, the actual size of the high-temperature alloy casing ring forging 3 cannot be reflected by the average radius, so that the ring diameter is indirectly obtained through the circumference, and the error is small. Firstly, measuring the circumferential lengths of different axial heights one by using a flexible rule or a rope to obtain the circumferential length L at the position of the maximum ring diameter1And a circumferential length L at the minimum ring diameter2Then converted into the maximum ring diameter
And minimum ring diameter
2. And obtaining the yield stress sigma and the required strain epsilon of the high-temperature alloy through a material tensile test.
3. Manufacturing an expansion die according to the cross section shape and size of the high-temperature alloy casing ring forging 3, wherein the expansion die comprises 12-segment split parts 1 on the periphery and an expansion conical head 2 in the middle, the inner peripheral surface of each split part is smoothly matched with the expansion conical head 2, the half-cone angle of the expansion conical head 2 is theta, the outer peripheral surface of each split part 1 is similar to the inner peripheral surface of the high-temperature alloy casing ring forging 3, and the expansion conical head 2 can push all the split parts 1 to horizontally move towards the periphery when moving downwards so as to expand the high-temperature alloy casing ring forging 3.
4. Heating the high-temperature alloy casing ring forging 3 to 0.8 times of the forging temperature, soaking, and then installing an expanding die, wherein one end of the large ring diameter of the high-temperature alloy casing ring forging 3 faces upwards.
5. The bulging conical head 2 runs downwards, the perimeter of the contact position of the bulging die and one end of the large diameter of the high-temperature alloy casing ring forging 3 is measured in real time, and the L-shaped perimeter is achieved1Then, the position is set as the bulging origin.
6. The bulging conical head 2 continues to move downwards from the bulging original point
Keeping for 1-5 minutes.
7. And returning the bulging conical head 2 to a position above the bulging original point, and rotating the casing ring forging by 15 degrees around the axis of the casing ring forging.
8. The bulging cone head 2 moves downwards again until the lower part of the original point
And keeping the position for 15-30 minutes.
9. And returning the bulging conical head 2, taking out the high-temperature alloy casing ring forging 3, and air-cooling to room temperature.
The invention applies uniform circumferential plastic strain to the high-temperature alloy casing ring forging 3 through the minimum force (minimum deformation) to adjust the distribution of residual stress, can effectively homogenize the uniformity of each stress along the circumferential direction, can provide the roundness precision of the ring forging, homogenizes the stress distribution of the casing ring forging before machining to reduce the machining deformation, and directly improves the machining efficiency of casing parts.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (6)
1. A stress homogenization method for a high-temperature alloy casing ring forging is characterized by comprising the following steps: comprises the steps of preparing and measuring the circumferential length L of the maximum ring diameter position of the high-temperature alloy casing ring forging in the early stage1And a circumferential length L at the minimum ring diameter2Obtaining the yield stress sigma and the required strain epsilon of the high-temperature alloy through a material tensile test, manufacturing a bulging die according to the cross section shape and the size of the high-temperature alloy casing ring forging, wherein the bulging die comprises a plurality of peripheral split parts and a middle bulging conical head, the inner peripheral surfaces of the split parts are smoothly matched with the bulging conical head, the half cone angle of the bulging conical head is theta, the outer peripheral surfaces of the split parts are approximate to the inner peripheral surface of the high-temperature alloy casing ring forging, and all the split parts can be pushed to horizontally move towards the periphery when the bulging conical head moves downwards so as to enable the high-temperature alloy casing ring forging to bulge; the specific operation is that the high-temperature alloy casing ring forge piece is heated to be lower than the forging temperature, is soaked and then is loaded with an expanding die, and an expanding conical head runs downwards H1Keeping the bulging conical head to return after a period of time, rotating the high-temperature alloy casing ring forging piece for a certain angle around the axis of the high-temperature alloy casing ring forging piece, and then enabling the bulging conical head to be H-shaped1And (3) running H2 downwards on the basis and keeping for a period of time, wherein the actual downward running total amount H of the bulging cone head is determined by the strain epsilon and the circumferential length L of the maximum ring diameter position of the high-temperature alloy casing ring forging1Determining the half cone angle theta to ensure that all parts of the high-temperature alloy casing ring forging are in a micro plastic deformation state; finally, taking the bulging conical head back stroke, taking out the high-temperature alloy casing ring forging, and air-cooling to room temperature; actual downward total amount of bulging cone head
Where e is a natural constant.
2. The method of claim 1, wherein the stress homogenization method comprises the following steps: the bulging cone head moves downwards
Keeping for 1-5 minutes; expanding conical head is then H1Run down on a foundation
Keeping for 15-30 minutes.
3. The method of claim 1, wherein the stress homogenization method comprises the following steps: when the bulging die is installed on the high-temperature alloy case ring forging, one end of the large ring diameter of the high-temperature alloy case ring forging is upward, the bulging conical head is downward operated, the perimeter of the contact position of the bulging die and one end of the large ring diameter of the high-temperature alloy case ring forging is measured in real time, and the L-shaped perimeter is achieved1Then, the position is set as the bulging origin.
4. The method of claim 1, wherein the stress homogenization method comprises the following steps: the method for measuring the size of the high-temperature alloy casing ring forging comprises the following steps: firstly, measuring the circumferential lengths of different axial heights one by using a flexible rule or a rope to obtain the circumferential length L at the position of the maximum ring diameter1And a circumferential length L at the minimum ring diameter2Then converted into the maximum ring diameter
And minimum ring diameter
5. The method of claim 1, wherein the stress homogenization method comprises the following steps: the bulging die is provided with 12 split parts, after the bulging conical head returns for the first time, the high-temperature alloy casing ring forging piece rotates around the axis of the bulging conical head for 15 degrees, and then the bulging conical head returnsAt H1Base-up run H2。
6. The method of claim 1, wherein the stress homogenization method comprises the following steps: and heating the high-temperature alloy casing ring forging to 0.8 time of the forging temperature, soaking, and then installing an expanding die.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811120739.0A CN109047392B (en) | 2018-09-25 | 2018-09-25 | Stress homogenization method for high-temperature alloy casing ring forging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811120739.0A CN109047392B (en) | 2018-09-25 | 2018-09-25 | Stress homogenization method for high-temperature alloy casing ring forging |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109047392A CN109047392A (en) | 2018-12-21 |
| CN109047392B true CN109047392B (en) | 2020-04-21 |
Family
ID=64765625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811120739.0A Active CN109047392B (en) | 2018-09-25 | 2018-09-25 | Stress homogenization method for high-temperature alloy casing ring forging |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109047392B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111283082A (en) * | 2020-02-27 | 2020-06-16 | 无锡派克新材料科技股份有限公司 | GH4169 low-pressure turbine casing uniform bulging process |
| CN111218629B (en) * | 2020-02-28 | 2024-02-09 | 株洲中车天力锻业有限公司 | High section of thick bamboo aluminum alloy ring destressing device |
| CN111745053B (en) * | 2020-06-30 | 2022-05-17 | 中国航发动力股份有限公司 | Rigid split expansion mold and expansion method for rotary shell |
| CN112058952A (en) * | 2020-07-16 | 2020-12-11 | 成都飞机工业（集团）有限责任公司 | Split type shape correcting tool for inner weld joint box-shaped piece |
| CN114147162B (en) * | 2021-11-15 | 2023-10-20 | 中北大学 | Extrusion forming die for special-shaped box body with large projection area |
| CN114260363A (en) * | 2021-12-16 | 2022-04-01 | 西南铝业（集团）有限责任公司 | Cold bulging method for large-sized special-shaped section ring forging |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101793646B (en) * | 2010-02-04 | 2011-06-15 | 西北工业大学 | Circumferential mechanical property testing device of valve-model type thin-wall tube |
| CN102397937B (en) * | 2011-11-24 | 2014-02-05 | 贵州安大航空锻造有限责任公司 | Thermal expansion method for titanium alloy flash welding collar piece |
| CN102489615B (en) * | 2011-11-24 | 2014-02-05 | 贵州安大航空锻造有限责任公司 | Thermal bulging process for special-shaped high-temperature-alloy rolled ring workpieces |
| CN203592077U (en) * | 2013-10-30 | 2014-05-14 | 北京航天新风机械设备有限责任公司 | Bulging tool of titanium alloy double-curvature rotation barrel |
| CN103537876B (en) * | 2013-10-30 | 2016-05-25 | 北京航天新风机械设备有限责任公司 | Titanium alloy Double curve degree rotating cylinder processing method |
| CN106964717B (en) * | 2016-07-11 | 2019-03-15 | 北京航空航天大学 | A kind of hydraulic expanding-forming residual stress homogenizer of large size looping mill rolling part |
-
2018
- 2018-09-25 CN CN201811120739.0A patent/CN109047392B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN109047392A (en) | 2018-12-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109047392B (en) | Stress homogenization method for high-temperature alloy casing ring forging | |
| CN100493765C (en) | Forging method of large scale conical barrel | |
| CN105252230B (en) | Machining process for inclined tee | |
| CN110538914B (en) | Plate sectional heating spinning forming method | |
| CN106695256A (en) | Ring rolling technology for profiling and shaping large-tapered wind-electricity bearing inner ring | |
| CN105050749A (en) | Method of producing ring-rolling blank | |
| CN103639220A (en) | Extrusion forming method of nickel alloy tube blank | |
| CN104313299A (en) | Heat treatment distortion multipoint stress compensation device and compensation method for large gear ring | |
| CN113477820A (en) | Annular part thermal expansion correction tool and correction method | |
| CN103934397A (en) | Engine turbine disc optimizing manufacturing process and device based on heat-resisting alloy | |
| CN108971355B (en) | method for eliminating wrinkling of large-curved-surface skin based on gradual-change gap mold | |
| CN105195541A (en) | GH4738 alloy fine-grain blank manufacturing method for supercritical power station steam turbine blade | |
| CN101935744A (en) | Method for sizing metal material mechanical part by phase change superplasticity | |
| CN111496172B (en) | Double-roller rotary forging forming method for thin-wall metal disc | |
| CN105382489A (en) | Thermoforming device and process of ring-shaped part formed by titanium alloy sheet | |
| CN106064221B (en) | A kind of forging technology of GCr15 rollers set | |
| CN108311622A (en) | Vacuum generator rotor forming method in automobile engine | |
| CN103447377B (en) | The Thermal expansion manufacturing process of stainless steel rectangular cross sectional annular part | |
| CN106903232B (en) | A kind of process and device of wheel rim flaring | |
| CN103447378B (en) | The Thermal expansion manufacturing process of bearing steel square-section annular part | |
| RU2687324C1 (en) | Forming device for production of profile roll ring, in particular of turbo-compressor disc | |
| TWI813862B (en) | Forming member manufacturing method and forming mold | |
| CN110633501B (en) | Method for determining bulging force energy parameters of ring rigid mold | |
| CN112792196B (en) | Forming method of turbine pump shell for liquid rocket engine | |
| CN106583592A (en) | Preparation method of high-elasticity spiral retainer ring |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |