CN113814667B - Processing method of triangular shaft sleeve - Google Patents
Processing method of triangular shaft sleeve Download PDFInfo
- Publication number
- CN113814667B CN113814667B CN202111219082.5A CN202111219082A CN113814667B CN 113814667 B CN113814667 B CN 113814667B CN 202111219082 A CN202111219082 A CN 202111219082A CN 113814667 B CN113814667 B CN 113814667B
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- Prior art keywords
- test bar
- hole
- tool
- outer circle
- machining
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- 238000003672 processing method Methods 0.000 title claims description 10
- 238000003754 machining Methods 0.000 claims abstract description 39
- 238000000034 method Methods 0.000 claims abstract description 28
- 238000005520 cutting process Methods 0.000 claims abstract description 23
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- 238000001514 detection method Methods 0.000 claims description 10
- 210000000078 claw Anatomy 0.000 claims description 7
- 238000005242 forging Methods 0.000 claims description 4
- 238000005496 tempering Methods 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 8
- 238000003801 milling Methods 0.000 description 5
- 230000007704 transition Effects 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 229910000797 Ultra-high-strength steel Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
- F16D1/08—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key
Abstract
The invention relates to the field of machine tool machining, in particular to a method for machining a triangular shaft sleeve, which comprises the following steps: acquiring a test bar and detecting; processing the inner circular hole of the test bar; performing heat treatment on the processed test rod; semi-finish turning large outer circle and inner circle holes; adopting a first tool to clamp the test bar to finish machining the outer circle and two end faces of the test bar; and clamping the test bar by adopting a second tool and cutting the special-shaped hole by slow wire feeding. The quality of the test bar is detected before manufacturing, then the inner circular hole is machined to remove redundant allowance, then heat treatment is carried out to improve strength and reduce deformation, then semi-finish turning and finish machining are carried out to ensure the machining quality, slow wire cutting is adopted, electric discharge machining is carried out, parts are not contacted, and the machining quality can be better controlled by depending on the self precision of equipment.
Description
Technical Field
The invention relates to the field of machine tool machining, in particular to a method for machining a triangular shaft sleeve.
Background
The triangle sleeve is a key part of the turbine product and plays a role in transmitting torque during the operation of the machine. As shown in fig. 1.
The triangular shaft sleeve is arranged on the main shaft, and the ultra-long precise special-shaped hole at the inner hole of the triangular shaft sleeve is matched with the special-shaped hole on the main shaft, so that the effects of torque and power transmission are achieved by utilizing the joint area and the matching precision between the special-shaped holes. The ultra-long precise special-shaped hole at the inner hole of the triangular shaft sleeve has high requirements on roughness and geometric tolerance precision, and the machining performance and design requirements of the material are combined, so that the machining method is greatly limited, and the design requirements are difficult to ensure by the conventional process scheme. If the roughness and geometric tolerance requirements cannot be controlled, the whole machine can vibrate greatly, the service life is short, the efficiency is low, and even safety accidents occur.
The part has the following difficulties in the existing manufacturing scheme; 1. the triangle shaft sleeve is made of 45CrNiMoVA, is low-alloy ultrahigh-strength steel, has required hardness of HRC40-44, is easy to cause cutter abrasion in comparison with milling, and therefore results of machining are unstable, and finally the requirement on the wear resistance of the machining cutter is high; 2. the length-diameter ratio of the inner hole reaches 3:1, and the rigidity of a cutter system in the milling process is difficult to meet the precision requirement; 3. the requirements on roughness and geometric tolerance precision are high, and the conventional milling process is difficult to meet; the special-shaped hole structure at the inner hole cannot be realized by conventional grinding, and new requirements are put forward for the formulation of a processing scheme. 4. The alignment precision is low, and the coaxiality requirements of the inner hole and the outer circle cannot be ensured. New solutions must be adopted, slow wire cutting.
Disclosure of Invention
The invention aims to provide a processing method of a triangular shaft sleeve, which aims to improve the processing precision of the triangular shaft sleeve.
In order to achieve the above object, the present invention provides a processing method of a triangle shaft sleeve, the triangle shaft sleeve includes a special-shaped hole and a circular hole, the circular hole is located in the middle of the special-shaped hole, the processing method of the triangle shaft sleeve includes:
acquiring a test bar and detecting;
processing the inner circular hole of the test bar;
performing heat treatment on the processed test rod;
semi-finish turning large outer circle and inner circle holes;
adopting a first tool to clamp the test bar to finish machining the outer circle and two end faces of the test bar;
and clamping the test bar by adopting a second tool and cutting the special-shaped hole by slow wire feeding.
After the test bar is clamped by the second tool and the special-shaped hole is cut by the slow wire, the method further comprises the following steps: the test bar is deburred and carved, and then is inspected.
Wherein, the special-shaped hole is a triangular hole.
The specific steps of acquiring the test stick and detecting are as follows:
light is emitted out of the surface of the test bar according to a preset size;
adopting an ultrasonic detection test bar, and forging after the ultrasonic detection test bar is qualified;
turning the two end faces of the test bar flat;
and detecting the test bar by adopting ultrasonic detection.
The specific steps for processing the inner circular hole of the test bar are as follows:
machining an inner round hole in the center of the test bar along the axial direction and removing sharp edges;
after the test bar is clamped and aligned by the three claws, the inner circular hole is processed again.
The method comprises the following specific steps of:
the outer circle at one end of the test bar is clamped by the hard three claws, the outer circle at the other end of the test bar is half finish-turned to a specified diameter, and a circular hole is machined;
step holes and sinking grooves are processed in the inner round holes;
the outer circle at the other end of the test bar is clamped by the hard three claws, and the outer circle at one end is half finely turned to the specified diameter;
step holes and sinking grooves are processed in the inner round holes;
and (5) tempering the test bar.
The specific steps of clamping the test bar by adopting the second tool and cutting the special-shaped hole by slow wire feeding are as follows:
pressing the second tool on the beam of the slow wire cutting;
the inner hole of the tool is aligned by a wire, and the size of the inner hole of the second tool is processed to the size of the outer circle of the test bar;
and (3) placing the part into an inner hole of a second tool, and cutting the special-shaped hole through slow wire cutting.
The invention discloses a processing method of a triangular shaft sleeve, which comprises the following steps: acquiring a test bar and detecting; processing the inner circular hole of the test bar; performing heat treatment on the processed test rod; semi-finish turning large outer circle and inner circle holes; adopting a first tool to clamp the test bar to finish machining the outer circle and two end faces of the test bar; and clamping the test bar by adopting a second tool and cutting the special-shaped hole by slow wire feeding. The quality of the test bar is detected before manufacturing, then an inner circular hole is machined to remove redundant allowance, then heat treatment is carried out to improve strength and reduce deformation, then semi-finish turning and finish machining are carried out to ensure the machining quality, slow wire cutting is adopted, electric discharge machining is carried out, parts are not contacted, the machining quality can be better controlled by depending on the self precision of equipment, and the cutter yielding problem is avoided; the slow wire cutting is adopted, so that unqualified production caused by cutter abrasion due to the hardness problem of parts is effectively avoided, and compared with a cutter, the cost is extremely low.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a partial view of a rotor component of the present invention;
FIG. 2 is a block diagram of a triangle sleeve of the present invention;
FIG. 3 is a first process diagram of a method of machining a triangular bushing of the present invention;
FIG. 4 is a second process diagram of a method of machining a triangular bushing of the present invention;
FIG. 5 is a third process diagram of a method of machining a triangular bushing of the present invention;
FIG. 6 is a fourth process diagram of a method of machining a triangular bushing of the present invention;
FIG. 7 is a fifth process diagram of a method of machining a triangular bushing of the present invention;
FIG. 8 is a first tooling diagram of a method of machining a triangular bushing of the present invention;
FIG. 9 is a second tooling diagram of a method of machining a triangular bushing of the present invention;
FIG. 10 is a flow chart of a method of processing a triangle sleeve of the present invention;
FIG. 11 is a flow chart of the invention for acquiring and detecting a test stick;
FIG. 12 is a flow chart of the present invention for machining the inner circular hole of the test stick;
FIG. 13 is a flow chart of the semi-finish turning of the large outer circle and inner circular hole of the present invention;
FIG. 14 is a flow chart of the present invention for clamping a test stick using a second tool and cutting a profiled hole by a slow wire.
1-triangle shaft sleeve, 11-special-shaped hole and 12-circular hole.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
Referring to fig. 1 to 14, the present invention provides a processing method of a triangle shaft sleeve: the triangular shaft sleeve 1 comprises a special-shaped hole 11 and a circular hole 12, the circular hole 12 is positioned in the middle of the special-shaped hole 11, the special-shaped hole 11 is taken as a triangular hole as an example, and the processing method of the triangular shaft sleeve 1 comprises the following steps:
s101, acquiring a test bar and detecting;
the method comprises the following specific steps:
s201, light is emitted out of the surface of the test bar according to a preset size;
light exits the surface of the bar at a dimension phi 79X 263.
S202, adopting an ultrasonic detection test bar, and forging after the ultrasonic detection test bar is qualified;
forging according to the standard requirements in the blank drawing.
S203, turning the two end faces of the test bar flat;
turning the two end surfaces, the total length is not less than 146, the roughness is Ra3.2, and the sharp edge chamfer angle is 0.5X45 DEG
S204, detecting the test bar by adopting ultrasonic detection.
Ultrasonic flaw detection is carried out according to the specification, and the acceptance grade A1 is checked.
S102, machining an inner circular hole of a test bar;
the method comprises the following specific steps:
s301, processing an inner round hole in the center of the test bar along the axial direction and removing sharp edges;
and (3) turning the test rod according to the requirement, and axially drilling and turning an inner hole to phi 35 on the center of the test rod, thereby removing sharp edges.
S302, after the test bar is clamped and aligned by three claws, the inner circular hole is processed again.
And after the three claws are held and approximately aligned, an inner hole is drilled and turned to phi 35 in the center of the round bar along the axial direction.
S103, performing heat treatment on the processed test bar;
and (3) carrying out heat treatment on the test bars according to the standard requirements, and checking the heat-treated test bars according to the standard requirements.
S104, semi-finish turning large outer circle and inner circle holes;
the method comprises the following specific steps:
s401, clamping the excircle of one end of the test bar by using a hard three-jaw, semi-finish turning the excircle of the other end to a specified diameter, and processing a circular hole 12;
according to FIG. 3, the left end big outer circle of the hard three-jaw clamp is half finish-machined to be 80 in length from phi 71.4 and 20 in length from phi 38 to 0.1 in the inner hole at the center.
S402, machining a step hole and a sinking groove in the inner round hole;
and (3) turning two sections of step holes at the inner hole to phi 39.8, machining a sinking groove to phi 50.4, and ensuring the total length of 144 by turning the large end surface at the right end.
S403, clamping the excircle of the other end of the test bar by using a hard three-jaw, and semi-finish turning the excircle of one end to the specified diameter;
turning the part, clamping a large outer circle by using a hard three-jaw clamp according to fig. 3, turning the large outer circle to phi 71.4, and turning the right end face to 142.5 of the total length.
S404, machining a step hole and a sinking groove in the inner round hole;
the inner hole phi at the center of the vehicle is 38-0.1 long and 20, and the two sections of step holes at the inner hole phi are 39.8.
S405, tempering the test bar.
Tempering: HRC40-44.
According to FIG. 4, after the left end big outer circle is clamped by the hard three-jaw clamp and the original outer circle and the runout of the end face are aligned to be smaller than 0.02mm, the right end face with the size of 142.5 is turned, the big outer circle is half-finished and turned to phi 71.4, an inner hole phi 38-0.1 is arranged at the right end of the center, and a sinking groove is formed at the inner hole to phi 39.8;
according to FIG. 5, after the left end big outer circle is clamped by the hard three-jaw clamp and the original outer circle is aligned and the runout of the end face is smaller than 0.2mm, the right end face with the size of 55 is turned, the right end big outer circle is turned to phi 70.4-0.1, and the inner hole phi 38.6+0.1 at the center of the turning; turning the part, turning the large outer circle phi 70.4-0.1 by a hard three-jaw clamp, connecting the large outer circle phi 70.4-0.1, turning the left end face to the total length 140+0.2, and turning the left end inner hole phi 38.6+0.1 at the center;
according to fig. 6, the hard three-jaw clamps the large outer circle, aligns the outer circle and jumps the end face within 0.05, grinds the inner hole to a size phi 39 + -0.01 (note that the size is as consistent as possible during mass production, and the equipment used in the invention can reach + -0.001).
S105, clamping the test bar by adopting a first tool, and carrying out finish machining on the outer circle and two end faces of the test bar;
using the first tooling shown in FIG. 8, grinding the outer circle to phi 70-0.1 by taking the inner hole processed in S23 as a positioning reference, and ensuring the coaxiality to be 0.01; the light exits from the two end surfaces, and the verticality is ensured to be 0.01.
S106, clamping the test bar by adopting a second tool, and cutting the special-shaped hole 11 by slow wire feeding.
The method comprises the following specific steps:
s501, pressing a second tool on a beam cut by a slow wire;
s502, aligning the inner hole of the tool by a wire, and processing the size of the inner hole of the tool to the size of the inner hole of the test bar;
s503, placing the part into an inner hole of a tool, and cutting the special-shaped hole 11 through slow wire cutting.
With the second tooling shown in fig. 9, the tooling bore has an initial dimension phi 50. After the tooling is pressed on a beam cut by a slow wire, the inner hole of the tooling is roughly aligned by a wire, and the size phi 50 of the inner hole of the tooling is processed to phi 70 (the size and the actual size of a part are prepared on site, so that the clearance value is ensured to be-0.005 to +0.005); the work is ready, the free state of the part is gently placed into the inner hole of the tool without being at the center of the slow wire, and the ultra-long special-shaped hole 11 is cut through the slow wire.
S107, deburring and lettering the test rod, and then checking.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
1. the hardness of the part HRC40-44 adopts a milling scheme, so that the cutter is worn quickly, and the dimensional tolerance, the roughness and the form and position tolerance cannot be ensured; even if a coated cutter is adopted for machining, the abrasion condition of the cutter in the finish machining process cannot be avoided, so that batch production cannot be realized, and the stability of the product quality cannot be ensured. The slow wire cutting is adopted, so that the problem of high hardness of parts is effectively avoided, and compared with a cutter, the cost is extremely low;
2. the length-diameter ratio of the inner hole of the part reaches 3:1, milling is adopted, the length-diameter ratio of the cutter can reach about 5:1, the rigidity of the whole cutter system is poor according to the relation between the rigidity of the cutter system and the diameter and length of the cutter, and cutter yielding phenomena with different degrees occur in the processing process, so that the design requirement cannot be guaranteed at all. By adopting slow wire cutting and electric discharge machining, parts are not contacted, and the machining quality can be better controlled by depending on the self precision of equipment.
3. The center of the part is aligned by a method of aligning the copper wire with the inner hole, the diameter of the copper wire and the alignment degree directly influence the positioning of the center of the part, and finally, the coaxiality of the special-shaped hole 11 and the excircle and the perpendicularity of the end face are out of tolerance; therefore, the special tool is designed, the allowance is reserved in the inner hole of the special tool, and the inner hole of the special tool is machined by utilizing slow wire cutting, so that the inner hole size of the special tool and the outer circle size of the part reach micro transition fit. Thus, the inner hole of the special tool is machined by using the slow wire feeding equipment, and the tool is automatically centered, so that tool setting errors are avoided; furthermore, the inner hole size of the special tool and the outer circle size of the part reach micro transition fit, and the coaxiality of the outer circle of the part and the inner hole of the special tool can be greatly ensured under the action force of the dead weight of the part. Through designing special frock, guarantee that special frock and part are processed simultaneously at same equipment same interval, improved repeated positioning accuracy, avoided the tool setting error, fine assurance part's size, roughness and form and position tolerance requirement.
4. The design of special frock has increased four exhaust grooves, makes things convenient for the part to pack under micro transition fit's the condition. Under the micro transition fit, the joint of the inner hole and the outer circle utilizes the lubrication and adsorption action of an oil film, so that the part and the special tool are combined into a whole, and are not separated in the processing process.
The above disclosure is only a preferred embodiment of the present invention, and it should be understood that the scope of the invention is not limited thereto, and those skilled in the art will appreciate that all or part of the procedures described above can be performed according to the equivalent changes of the claims, and still fall within the scope of the present invention.
Claims (3)
1. A processing method of a triangular shaft sleeve is characterized in that,
the triangular shaft sleeve comprises a special-shaped hole and a circular hole, the special-shaped hole is a triangular hole, the circular hole is positioned in the middle of the special-shaped hole, and the processing method of the triangular shaft sleeve comprises the following steps:
acquiring a test bar and detecting;
processing the inner circular hole of the test bar;
performing heat treatment on the processed test rod;
semi-finish turning large outer circle and inner circle holes;
adopting a first tool to clamp the test bar to finish machining the outer circle and two end faces of the test bar;
clamping the test bar by adopting a second tool and cutting the special-shaped hole by slow wire feeding;
the specific steps for processing the inner circular hole of the test bar are as follows:
machining an inner round hole in the center of the test bar along the axial direction and removing sharp edges;
after the three-jaw clamping and aligning the test bar, processing the inner circular hole again;
the specific steps of semi-finish turning the large outer circle and the inner round hole are as follows:
the outer circle at one end of the test bar is clamped by the hard three claws, the outer circle at the other end of the test bar is half finish-turned to a specified diameter, and a circular hole is machined;
step holes and sinking grooves are processed in the inner round holes;
the outer circle at the other end of the test bar is clamped by the hard three claws, and the outer circle at one end is half finely turned to the specified diameter;
tempering the test bar;
the specific steps of clamping the test bar by adopting the second tool and cutting the special-shaped hole by slow wire feeding are as follows:
pressing the second tool on the beam of the slow wire cutting;
the inner hole of the tool is aligned by a wire, and the size of the inner hole of the second tool is processed to the size of the outer circle of the test bar;
and (3) placing the part into an inner hole of a second tool, and cutting the special-shaped hole through slow wire cutting.
2. A method of manufacturing a triangular bushing as claimed in claim 1, wherein,
after the test bar is clamped by the second tool and the special-shaped hole is cut by the slow wire, the method further comprises the following steps: the test bar is deburred and carved, and then is inspected.
3. A method of manufacturing a triangular bushing as claimed in claim 1, wherein,
the specific steps of acquiring the test stick and detecting are as follows:
light is emitted out of the surface of the test bar according to a preset size;
adopting an ultrasonic detection test bar, and forging after the ultrasonic detection test bar is qualified;
turning the two end faces of the test bar flat;
and detecting the test bar by adopting ultrasonic detection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111219082.5A CN113814667B (en) | 2021-10-20 | 2021-10-20 | Processing method of triangular shaft sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111219082.5A CN113814667B (en) | 2021-10-20 | 2021-10-20 | Processing method of triangular shaft sleeve |
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| Publication Number | Publication Date |
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| CN113814667A CN113814667A (en) | 2021-12-21 |
| CN113814667B true CN113814667B (en) | 2023-11-03 |
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| CN202111219082.5A Active CN113814667B (en) | 2021-10-20 | 2021-10-20 | Processing method of triangular shaft sleeve |
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|---|---|---|---|---|
| WO1980002525A1 (en) * | 1979-05-14 | 1980-11-27 | T Brewer | Manufactured contoured internal diameter bushing |
| JP2002339093A (en) * | 2001-05-15 | 2002-11-27 | Hikari Tekku Kk | Method of manufacturing sleeve |
| EP1384537A1 (en) * | 2002-07-25 | 2004-01-28 | Tsubakimoto Chain Co. | Method of producing a bushing |
| CN102069346A (en) * | 2009-11-23 | 2011-05-25 | 常州现代设计与制造中心 | Process for processing spindle sleeve of built-in motorized spindle unit |
| CN103659160A (en) * | 2013-11-22 | 2014-03-26 | 哈尔滨汽轮机厂有限责任公司 | Method for rough turning turbine seal sleeve made of high-temperature alloy GH901 |
| CN103831496A (en) * | 2012-11-20 | 2014-06-04 | 苏州星诺奇传动科技有限公司 | Method for machining grooves in shaft |
| JP2018105341A (en) * | 2016-12-22 | 2018-07-05 | 株式会社荏原製作所 | Shaft sleeve, rotary machine and method for manufacturing shaft sleeve |
| CN110860866A (en) * | 2019-11-05 | 2020-03-06 | 东莞市源开鑫精密科技有限公司 | Method for machining precise special-shaped hole |
Family Cites Families (1)
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| US6978706B2 (en) * | 2001-11-30 | 2005-12-27 | J. F. Berns Co., Inc. | Machine tool spindle liners and methods for making same |
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2021
- 2021-10-20 CN CN202111219082.5A patent/CN113814667B/en active Active
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|---|---|---|---|---|
| WO1980002525A1 (en) * | 1979-05-14 | 1980-11-27 | T Brewer | Manufactured contoured internal diameter bushing |
| JP2002339093A (en) * | 2001-05-15 | 2002-11-27 | Hikari Tekku Kk | Method of manufacturing sleeve |
| EP1384537A1 (en) * | 2002-07-25 | 2004-01-28 | Tsubakimoto Chain Co. | Method of producing a bushing |
| CN102069346A (en) * | 2009-11-23 | 2011-05-25 | 常州现代设计与制造中心 | Process for processing spindle sleeve of built-in motorized spindle unit |
| CN103831496A (en) * | 2012-11-20 | 2014-06-04 | 苏州星诺奇传动科技有限公司 | Method for machining grooves in shaft |
| CN103659160A (en) * | 2013-11-22 | 2014-03-26 | 哈尔滨汽轮机厂有限责任公司 | Method for rough turning turbine seal sleeve made of high-temperature alloy GH901 |
| JP2018105341A (en) * | 2016-12-22 | 2018-07-05 | 株式会社荏原製作所 | Shaft sleeve, rotary machine and method for manufacturing shaft sleeve |
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| CN113814667A (en) | 2021-12-21 |
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