CN209190304U - The processing tool for excircle of processing thin-wall annular part and total tooling - Google Patents
The processing tool for excircle of processing thin-wall annular part and total tooling Download PDFInfo
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- CN209190304U CN209190304U CN201822120711.9U CN201822120711U CN209190304U CN 209190304 U CN209190304 U CN 209190304U CN 201822120711 U CN201822120711 U CN 201822120711U CN 209190304 U CN209190304 U CN 209190304U
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- thin
- annular part
- excircle
- wall annular
- frustum
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Abstract
The utility model discloses the processing tool for excircle of processing thin-wall annular part and total toolings.The processing tool for excircle includes positioning device, and the positioning device includes the mutually matched left locating piece in end and right locating piece, wall thickness≤4mm of the thin-wall annular part；The surface carburization hardness of the thin-wall annular part is 50~65HRC, and the left locating piece is equipped with the first frustum, and the right locating piece is equipped with the second frustum；The positioning device further includes the elastic ring with the cooperation of green body inner wall, which is equipped with protrusion, which has two inclined-planes in left and right, cooperate respectively with first frustum and the second frustum.In use, left locating piece and right locating piece it is close to each other and the protrusion on elastic ring squeeze by the first frustum and the second frustum make elastic ring to outside expand, thus equably contact with the inner wall of green body simultaneously support blank.After the completion of finishing, elastic ring can restore rapidly deformation, convenient for taking out.
Description
Technical field
The utility model relates to the technical fields of thin-wall annular part processing, in particular to processing thin-wall annular part
Inner hole processing tool and total tooling.
Background technique
Thin-walled parts are more and more widely used in space product, and thin-wall workpiece is because its wall is thin, difficult processing
Also at thing intractable in industry.Inner hole, outer circle and the position degree requirement of thin-wall annular part are most important processing difficulties.This
The presence of a little processing difficulties so that in process installation way be determined to become workpiece whether He Ge key.Existing clamping
Mode directly grabs green body using claw and is finished, and surface quality, circularity are difficult to ensure.Especially for workpiece surface
Nitriding post-processing easily deforms because of poor rigidity；In addition surface hardness is higher, processing difficulties, there are cutters when cutting easily to collapse
Phenomena such as sword, abrasion.
Utility model content
The main purpose of the utility model is to provide processing tools, are finished with solving thin-wall annular part in the prior art
Difficult problem.
To achieve the goals above, one aspect according to the present utility model provides a kind of processing thin-wall annular part
Inner hole processing tool, including claw, wall thickness≤4mm of the thin-wall annular part；The surface carburization hardness of the thin-wall annular part
For 50~65HRC, elastomer is equipped between the claw and green body；The width of the elastomer is 20~80mm；The elastomer
For the C-shaped ring with opening.
Thin-wall annular part is obtained after green body processing.Firstly, making green body by the way that elastomer is arranged between claw and green body
The forced area for bearing claw aid power dramatically increases, and the deformation of green body can be effectively reduced.Secondly, the bullet with above-mentioned width
Property body best package action can be played to green body, utmostly reduce deformation.Preferably, the width of the elastomer be 40~
60mm.It is open by setting, the deformation space of elastomer can be increased, it is both easy to disassemble, it also can be by reducing opening width
Effectively to firmly grasp green body.As it can be seen that the utility model structure is very simple, even for wall thickness≤4mm and surface carburization hardness is
The interior hole machined of the easily-deformable thin-wall annular part of 50~65HRC can also obtain optimal locating effect, gained thin-wall annular part
Roughness, the concentricity of outer circle and inner hole and inner hole circularity can reach requirement.
Further, the wall thickness of the elastomer is 2~4mm.Good clamping effect and easy to disassemble as a result,.
Further, the internal diameter of the elastomer is 0.1~0.25mm smaller than the outer diameter of the green body.As a result, when clamping base
When the unfinished one end of body, Light deformation will occur for clamping process elastomer, and clamping can be made more firm.Then work as folder
When holding one end that green body has been finished, the elastomer internal diameter being arranged in this way is matched with opening, also can satisfy clamping effect.
Preferably, the internal diameter of the elastomer is 0.15~0.2mm smaller than the outer diameter of the green body.
Further, the length of the opening is 10~30mm.If being open Taizai, trouble is dismantled, if opening is too wide,
It is irregular to will lead to green body stress.As a result, when the length of the opening is 10~30mm, convenient disassembly and good clamping effect.It is excellent
Selection of land, the length of the opening are 15~25mm.
Further, the claw is soft three-jaw.Green body pinching deformation is further decreased as a result,.
Further, the material of the elastomer is 60Si2Mn.Using effect is best as a result,.
To achieve the goals above, other side according to the present utility model additionally provides processing thin-wall annular part
Total tooling, including inner hole processing tool and processing tool for excircle, wall thickness≤4mm of the thin-wall annular part；The circular thin-wall
The surface carburization hardness of part is 50~65HRC, and the inner hole processing tool is the interior hole machined work of above-mentioned processing thin-wall annular part
Dress.
To achieve the goals above, other side according to the present utility model additionally provides processing thin-wall annular part
Processing tool for excircle, including positioning device, the positioning device include the mutually matched left locating piece in end and right locating piece, institute
State wall thickness≤4mm of thin-wall annular part；The surface carburization hardness of the thin-wall annular part is 50~65HRC, the left locating piece
It is equipped with the first frustum, the right locating piece is equipped with the second frustum；The positioning device further includes cooperating with green body inner wall
Elastic ring, the elastic ring inner wall be equipped with protrusion, the protrusion have control two inclined-planes, respectively with first frustum and second
Frustum cooperation.
Thin-wall annular part is obtained after green body processing.In use, left locating piece and right locating piece are close to each other and pass through the
One frustum and the second frustum squeeze the protrusion on elastic ring and expand elastic ring to outside, thus equably with green body
Inner wall contact and support blank, it is evident that using the processing tool for excircle of the utility model, green body during processed respectively
Locate uniform force, even for wall thickness≤4mm and surface carburization hardness is the outer circle of the easily-deformable thin-wall annular part of 50~65HRC
Processing, can also obtain optimal locating effect.After the completion of finishing, elastic ring can restore rapidly deformation, convenient for taking out.
Further, first frustum is equipped with pillar, which is equipped with threaded hole, and second frustum is ring
Shape cooperates with the pillar at center, and the right locating piece is equipped with pressure ring connect with the frustum, the pressure ring equipped with
The threaded rod of the threaded hole cooperation.Movement by threaded rod in threaded hole as a result, adjusts left locating piece and right positioning
The distance between part, to realize compression and disassembly.
Further, the cone angle of first frustum and the second frustum is 10~30 °.Cone angle is excessive or too small, elastomer
It is all not susceptible to expand.
Further, the wall of the elastic ring is equipped with axial through slot.Increase the degree of elastic ring extension as a result,.
Further, the through slot head extends to the elastic ring end, and tail portion is apart from elastic ring other end end
8~14mm of portion.Width between through slot tail portion and elastic ring end is excessive, then is not easy to expand, too small, then easy to damage.As a result, when
When tail portion is apart from the elastic ring other end 8~14mm of end, expansion effect is good and long service life.
Further, the through slot is at least two, and the orientation of adjacent through slot is opposite.Thus expansion effect is good.
Further, the tail portion of the through slot is equipped with the through-hole that diameter is greater than through slot width.Avoid through slot tail portion sharp as a result,
Angle stress is concentrated, and causes to crack.
Further, the outer diameter of the elastic ring is 0.5~2mm smaller than the internal diameter of the thin-wall annular part.If the difference
It is excessive, then it is excessively high to the degrees of expansion requirement of elastic ring, it is inconvenient to use if the difference is too small.As a result, convenient disassembly and
Degrees of expansion needed for elastic ring is low.
Further, the left locating piece is connect with claw；The claw is soft three-jaw.Green body is further decreased as a result,
Pinching deformation.
To achieve the goals above, other side according to the present utility model additionally provides processing thin-wall annular part
Total tooling, including inner hole processing tool and processing tool for excircle, wall thickness≤4mm of the thin-wall annular part；The circular thin-wall
The surface carburization hardness of part is 50~65HRC, the processing tool for excircle of the above-mentioned processing thin-wall annular part of processing tool for excircle.
By the way that elastomer is arranged between claw and green body, the forced area for making green body bear claw aid power significantly increases
Add, the deformation of green body can be effectively reduced.Left locating piece and right locating piece it is close to each other and pass through the first frustum and the second frustum
Protrusion on elastic ring is squeezed and expands elastic ring to outside, to equably contact and support with the inner wall of green body
The deformation of green body is effectively reduced in green body.As it can be seen that the utility model and inner hole processing tool and processing tool for excircle for wall thickness
The interior hole machined and Excircle machining for the easily-deformable thin-wall annular part that≤4mm and surface carburization hardness are 50~65HRC have excellent
Locating effect.Using total tooling of inner hole processing tool and/or processing tool for excircle, the thin-wall annular part processed it is coarse
The concentricity and inner hole circularity of degree, outer circle and inner hole can reach requirement.
The utility model is described further with reference to the accompanying drawings and detailed description.The utility model is additional
Aspect and advantage will be set forth in part in the description, and partially will become apparent from the description below, or practical by this
Novel practice is recognized.
Detailed description of the invention
The attached drawing for constituting a part of the utility model is used to assist understanding to the utility model, provided in attached drawing
Content and its related explanation can be used for explaining the utility model in the present invention, but is not constituted to the utility model not
Work as restriction.
In the accompanying drawings:
Fig. 1 is the structural schematic diagram for the inner hole processing tool that the utility model processes above-mentioned thin-wall annular part.
Fig. 2 is the structural schematic diagram of the utility model elastomer.
Fig. 3 is the partial sectional view for the processing tool for excircle that the utility model processes above-mentioned thin-wall annular part.
Fig. 4 is the cross-sectional view for the processing tool for excircle that the utility model processes above-mentioned thin-wall annular part.
Fig. 5 is the perspective view of the utility model elastic ring.
Fig. 6 is the front view of the utility model elastic ring.
Fig. 7 is the side view of the utility model elastic ring.
Fig. 8 is the sectional view along A-A of Fig. 6.
Related label in above-mentioned attached drawing are as follows:
1: green body；
2: claw；
3: elastomer；
31: opening；
4: left locating piece；
41: the first frustums；
42: pillar；
43: threaded hole；
51: the second frustums；
52: pressure ring；
53: threaded rod；
6: elastic ring；
61: protrusion；
62: through slot；
63: through-hole.
Specific embodiment
Clear, complete explanation is carried out to the utility model with reference to the accompanying drawing.Those of ordinary skill in the art are being based on
The utility model will be realized in the case where these explanations.Before being illustrated in conjunction with attached drawing to the utility model, spy is needed
It is not pointed out that:
The technical solution provided in each section including following the description and technical characteristic in the utility model,
In the case where not conflicting, these technical solutions and technical characteristic be can be combined with each other.
In addition, the embodiments of the present invention being related in following the description are generally only the reality of the utility model a part
Example is applied, instead of all the embodiments.Therefore, based on the embodiments of the present invention, those of ordinary skill in the art are not having
Every other embodiment obtained under the premise of creative work is made, the model of the utility model protection all should belong to
It encloses.
About term in the utility model and unit.The specification and claims of the utility model and related part
In term " includes ", " having " and their any deformation, it is intended that cover and non-exclusive include.
Embodiment 1-5
The inner hole processing tool of the above-mentioned thin-wall annular part of processing as shown in Figs. 1-2, including claw 2, the claw 2 with
Elastomer 3 is equipped between green body 1；The width of the elastomer 3 is 20~80mm；The elastomer 3 is the C-shaped ring with opening 31；
The internal diameter of the elastomer 3 is 0.1~0.25mm smaller than the outer diameter of the green body 1；The length of the opening 31 is 10~30mm；Institute
The wall thickness for stating elastomer 3 is 2~4mm；The claw 2 is soft three-jaw.The material of elastomer 3 is 60Si2Mn.Wherein, Mei Geshi
The parameter for applying the elastomer 3 of example is shown in Table 1.
Table 1 is the structural parameters of the elastomer of embodiment 1-5.
| Embodiment number | Width mm | Wall thickness mm | Opening length mm | The difference mm of internal diameter and green body outer diameter |
| Embodiment 1 | 20 | 2 | 10 | 0.1 |
| Embodiment 2 | 40 | 3 | 15 | 0.15 |
| Embodiment 3 | 50 | 3 | 20 | 0.15 |
| Embodiment 4 | 60 | 3 | 25 | 0.2 |
| Embodiment 5 | 80 | 4 | 30 | 0.25 |
Embodiment 6
The processing tool for excircle of processing thin-wall annular part as shown in figures 3-8, including positioning device, the positioning device packet
The mutually matched left locating piece 4 in end and right locating piece are included, the left locating piece 4 is equipped with the first frustum 41, the right positioning
Part is equipped with the second frustum 51；The positioning device further includes the elastic ring 6 with the cooperation of 1 inner wall of green body, on 6 inner wall of elastic ring
Equipped with protrusion 61, which has two inclined-planes in left and right, cooperates respectively with first frustum 41 and the second frustum 51.
First frustum 41 is equipped with pillar 42, which is equipped with threaded hole 43, sets on second frustum 51
Having with the second frustum 51 described in the through-hole 63 of the pillar 42 cooperation is ring-type, is cooperated at center with the pillar 42, the right side
Locating piece is equipped with the pressure ring 52 connecting with the frustum, which is equipped with the threaded rod cooperated with the threaded hole 43
53；
The cone angle of first frustum 41 and the second frustum 51 is 10~30 °.
The wall of the elastic ring 6 is equipped with axial through slot 62, and 62 head of through slot extends to 6 end of elastic ring
Portion, tail portion is apart from the 6 8~14mm of other end end of elastic ring.
The through slot 62 is at least two, and the orientation of adjacent through slot 62 is opposite.
The tail portion of the through slot 62 is equipped with the through-hole 63 that diameter is greater than 62 width of through slot.
The outer diameter of the elastic ring 6 is 0.5~2mm smaller than the internal diameter of the thin-wall annular part.
The left locating piece 4 is connect with claw；The claw is soft three-jaw.
The material of the elastic ring 6 is 60Si2Mn。
Wherein, specific numerical value is referring to embodiment 7-9.
Embodiment 7
The wall thickness of thin-wall annular part is 2.5mm, hole size 191mm, excircle dimension 196mm；Length is 130mm；It is described
The surface carburization hardness of thin-wall annular part is 55~60HRC, material 30CrMnSiA, and the inner hole of the thin-wall annular part is coarse
Degree is Ra1.6；Outer circle and the concentricity of inner hole are φ 0.02mm；Inner hole circularity is 0.05mm.
The processing of the thin-wall annular part is the following steps are included: 1, blanking；2, general vehicle roughing outer circle, planar end surface, in heavy boring
Kong Tong guarantees that two sides circle end face is vertical with axis of workpiece；3, numerical control lathe semifinishing inner hole, outer circle, flat both sides of the face, obtain
Green body 1, the inner hole of the green body 1 stay the machining allowance of 0.5mm, and outer circle stays the machining allowance of 0.15mm；4, at outer round surface nitriding
Reason, makes 55~60HRC of its hardness；Then row finishing is put into using following chief engineer.
Process total tooling of thin-wall annular part, including inner hole processing tool and processing tool for excircle.
Wherein, the inner hole processing tool is the inner hole processing tool of the processing thin-wall annular part of embodiment 3.
The processing tool for excircle is the processing tool for excircle of the processing thin-wall annular part of embodiment 2, first frustum
41 and second frustum 51 cone angle be 15 °, 62 tail portion of through slot is apart from 6 other end end 10mm of elastic ring, the through slot 62
It is 12, the orientation of adjacent through slot 62 is on the contrary, the outer diameter of elastic ring 6 is 1mm smaller than the internal diameter of the thin-wall annular part.
Embodiment 8
The wall thickness of thin-wall annular part is 4mm, hole size 190mm, excircle dimension 198mm；Length is 130mm；It is described thin
The surface carburization hardness of wall circular part is 60~65HRC, material 30CrMnSiA, the inner hole roughness of the thin-wall annular part
For Ra3；Outer circle and the concentricity of inner hole are φ 0.05mm；Inner hole circularity is 0.1mm.
The processing of the thin-wall annular part is the following steps are included: 1, blanking；2, general vehicle roughing outer circle, planar end surface, in heavy boring
Kong Tong guarantees that two sides circle end face is vertical with axis of workpiece；3, numerical control lathe semifinishing inner hole, outer circle, flat both sides of the face, obtain
Green body 1, the inner hole of the green body 1 stay the machining allowance of 0.5mm, and outer circle stays the machining allowance of 0.25mm；4, at outer round surface nitriding
Reason, makes 60~65HRC of its hardness；Then row finishing is put into using following chief engineer.
Process total tooling of thin-wall annular part, including inner hole processing tool and processing tool for excircle.
Wherein, the inner hole processing tool is the inner hole processing tool of the processing thin-wall annular part of embodiment 4.
The processing tool for excircle is the processing tool for excircle of the processing thin-wall annular part of embodiment 2, first frustum
41 and second frustum 51 cone angle be 30 °, 62 tail portion of through slot is apart from 6 other end end 14mm of elastic ring, the through slot 62
It is 8, the orientation of adjacent through slot 62 is on the contrary, the outer diameter of elastic ring 6 is 2mm smaller than the internal diameter of the thin-wall annular part.
Embodiment 9
The wall thickness of thin-wall annular part is 1.5mm, hole size 192mm, excircle dimension 195mm；Length is 130mm；It is described
The surface carburization hardness of thin-wall annular part is 50~55HRC, material 30CrMnSiA, and the inner hole of the thin-wall annular part is coarse
Degree is Ra3；Outer circle and the concentricity of inner hole are φ 0.03mm；Inner hole circularity is 0.08mm.
The processing of the thin-wall annular part is the following steps are included: 1, blanking；2, general vehicle roughing outer circle, planar end surface, in heavy boring
Kong Tong guarantees that two sides circle end face is vertical with axis of workpiece；3, numerical control lathe semifinishing inner hole, outer circle, flat both sides of the face, obtain
Green body 1, the inner hole of the green body 1 stay the machining allowance of 0.5mm, and outer circle stays the machining allowance of 0.1mm；4, at outer round surface nitriding
Reason, makes 50~55HRC of its hardness；Then row finishing is put into using following chief engineer.
Process total tooling of thin-wall annular part, including inner hole processing tool and processing tool for excircle.
Wherein, the inner hole processing tool is the inner hole processing tool of the processing thin-wall annular part of embodiment 2.
The processing tool for excircle is the processing tool for excircle of the processing thin-wall annular part of embodiment 2, first frustum
41 and second frustum 51 cone angle be 10 °, 62 tail portion of through slot is apart from 6 other end end 8mm of elastic ring, the through slot 62
10, the orientation of adjacent through slot 62 is on the contrary, the outer diameter of elastic ring 6 is 0.5mm smaller than the internal diameter of the thin-wall annular part.
Above-mentioned 30CrMnSiA executes National Standard of the People's Republic of China: GB/T 3077-1988.
Above-mentioned 60Si2Mn executes National Standard of the People's Republic of China: GB/T 1222-2007.
The related content of the utility model is illustrated above.Those of ordinary skill in the art are being based on these explanations
In the case where will realize the utility model.Above content based on the utility model, those of ordinary skill in the art are not having
Every other embodiment obtained under the premise of creative work is made, the model of the utility model protection all should belong to
It encloses.
Claims (10)
1. processing the processing tool for excircle of thin-wall annular part, including positioning device, the positioning device includes that end cooperates
Left locating piece (4) and right locating piece, wall thickness≤4mm of the thin-wall annular part；The surface carburization of the thin-wall annular part is hard
Degree is 50~65HRC, it is characterised in that: the left locating piece (4) is equipped with the first frustum (41), and the right locating piece is equipped with
Second frustum (51)；The positioning device further includes the elastic ring (6) with the cooperation of green body (1) inner wall, on elastic ring (6) inner wall
Equipped with raised (61), which, which has, controls two inclined-planes, respectively with first frustum (41) and the second frustum (51)
Cooperation.
2. the processing tool for excircle of processing thin-wall annular part as described in claim 1, it is characterised in that: first frustum
(41) pillar (42) are equipped with, which is equipped with threaded hole (43), and second frustum (51) is ring-type, at center with
Pillar (42) cooperation, the right locating piece are equipped with the pressure ring (52) connecting with the frustum, which is equipped with
With the threaded rod (53) of the threaded hole (43) cooperation.
3. the processing tool for excircle of processing thin-wall annular part as described in claim 1, it is characterised in that: first frustum
(41) and the cone angle of the second frustum (51) is 10~30 °.
4. the processing tool for excircle of processing thin-wall annular part as described in claim 1, it is characterised in that: the elastic ring (6)
Wall be equipped with axial through slot (62).
5. the processing tool for excircle of processing thin-wall annular part as claimed in claim 4, it is characterised in that: through slot (62) head
Portion extends to the elastic ring (6) end, and tail portion is apart from the elastic ring (6) 8~14mm of other end end.
6. the processing tool for excircle of processing thin-wall annular part as claimed in claim 4, it is characterised in that: the through slot (62) is
At least two, the orientation of adjacent through slot (62) is opposite.
7. the processing tool for excircle of processing thin-wall annular part as claimed in claim 4, it is characterised in that: the through slot (62)
Tail portion is equipped with the through-hole (63) that diameter is greater than through slot (62) width.
8. the processing tool for excircle of processing thin-wall annular part as described in claim 1, it is characterised in that: the elastic ring (6)
Outer diameter it is 0.5~2mm smaller than the internal diameter of the thin-wall annular part.
9. the processing tool for excircle of processing thin-wall annular part as described in claim 1, it is characterised in that: the left locating piece
(4) it is connect with claw；The claw is soft three-jaw.
10. total tooling of thin-wall annular part, including inner hole processing tool and processing tool for excircle are processed, the thin-wall annular part
Wall thickness≤4mm；The surface carburization hardness of the thin-wall annular part is 50~65HRC, it is characterised in that: the processing tool for excircle
For the processing tool for excircle for processing thin-wall annular part described in one of claim 1-9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822120711.9U CN209190304U (en) | 2018-12-17 | 2018-12-17 | The processing tool for excircle of processing thin-wall annular part and total tooling |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822120711.9U CN209190304U (en) | 2018-12-17 | 2018-12-17 | The processing tool for excircle of processing thin-wall annular part and total tooling |
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|---|---|
| CN209190304U true CN209190304U (en) | 2019-08-02 |
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ID=67429362
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110480389A (en) * | 2019-09-27 | 2019-11-22 | 重庆华渝电气集团有限公司 | The inwall processing structure and outer wall of thin-wall long and thin pipe fitting process structure |
| CN112338457A (en) * | 2020-10-28 | 2021-02-09 | 厦门健康伦自动仪器有限公司 | Machining process for circular ring thin-wall workpiece |
| CN113103026A (en) * | 2021-03-09 | 2021-07-13 | 武汉镁里镁科技有限公司 | Annular part machining clamp and annular part machining method |
| CN114055097A (en) * | 2021-12-08 | 2022-02-18 | 湖北三江航天红阳机电有限公司 | Method for machining tubular part with runner groove |
| CN114260736A (en) * | 2021-10-29 | 2022-04-01 | 中国航发西安动力控制科技有限公司 | Opening sleeve for thin-wall step cover plate and thin-wall step cover plate machining method |
| CN114700505A (en) * | 2022-04-19 | 2022-07-05 | 中煤张家口煤矿机械有限责任公司 | Method and device for machining ultra-long and ultra-thin sleeve type part |
-
2018
- 2018-12-17 CN CN201822120711.9U patent/CN209190304U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110480389A (en) * | 2019-09-27 | 2019-11-22 | 重庆华渝电气集团有限公司 | The inwall processing structure and outer wall of thin-wall long and thin pipe fitting process structure |
| CN112338457A (en) * | 2020-10-28 | 2021-02-09 | 厦门健康伦自动仪器有限公司 | Machining process for circular ring thin-wall workpiece |
| CN113103026A (en) * | 2021-03-09 | 2021-07-13 | 武汉镁里镁科技有限公司 | Annular part machining clamp and annular part machining method |
| CN114260736A (en) * | 2021-10-29 | 2022-04-01 | 中国航发西安动力控制科技有限公司 | Opening sleeve for thin-wall step cover plate and thin-wall step cover plate machining method |
| CN114055097A (en) * | 2021-12-08 | 2022-02-18 | 湖北三江航天红阳机电有限公司 | Method for machining tubular part with runner groove |
| CN114700505A (en) * | 2022-04-19 | 2022-07-05 | 中煤张家口煤矿机械有限责任公司 | Method and device for machining ultra-long and ultra-thin sleeve type part |
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