CN205271505U - A anchor clamps for clamping large flange - Google Patents
A anchor clamps for clamping large flange Download PDFInfo
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- CN205271505U CN205271505U CN201620046246.7U CN201620046246U CN205271505U CN 205271505 U CN205271505 U CN 205271505U CN 201620046246 U CN201620046246 U CN 201620046246U CN 205271505 U CN205271505 U CN 205271505U
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Abstract
The utility model provides an anchor clamps that an anchor clamps for clamping large flange, it relates to one kind and is used for the clamping flange. In order to solve power turbine used in the current steam turbine large flange at the turning in -process, because large flange be thin wall spare, the influence that receives the machine to add stress and benchmark overproof is yielding, and large flange is at the loading and unloading in -process because of the simply unreasonable problem that leads to the deformation of mode simultaneously. The utility model discloses a two schemes, two scheme differences do the centre of a circle O of quotation locates to follow its disk body thickness orientation processing on the chassis has cylindrical boss or circular recess, and other structures are the same, and quotation processing has two at least loading and unloading grooves on the chassis promptly, and large flange sets up on cylindrical boss or circular recess, and just the equipartition was around large flange on a N clamp plate lay in the chassis, and every clamp plate is tight on large flange's outer wall near large flange's one end top, and the mounting is connected through one to every clamp plate can dismantle the connection on the loading and unloading hole of the correspondence of this clamp plate. The utility model is used for location and clamping large flange.
Description
Technical field
The utility model relates to a kind of fixture for clamping large flange, belongs to field of machining.
Background technology
The one that the large flange that in steam turbine, work turbine uses is flange, such large flange has the feature that build is big, wall is thin makes large flange in turning process, affecting in the course of processing accurate location difficulty by Machining stress, benchmark are overproof etc. and are easily out of shape, large flange causes the problem of distortion in handling process because mode is simply unreasonable simultaneously. These factors all cause large flange to be out of shape after size more difficult meet drawing requirement, the substandard product quantity caused due to this kind of distortion increases, thus tooling cost is difficult to reduce. Therefore, there is great difficulty in processing in flange type thin-walled part.
Practical novel content
The utility model is that the large flange for solving work turbine use in existing steam turbine is in turning process, owing to large flange is thin-walled part, the impact overproof by Machining stress and benchmark is easily out of shape, large flange causes the problem of distortion in handling process because mode is simply unreasonable simultaneously, and then provides a kind of fixture for clamping large flange.
The utility model, for solving the problem, adopts following technical scheme:
A kind of fixture for clamping large flange, it comprises chassis, N number of connection fixture and N number of pressing plate, described chassis level is arranged, the dish body on described chassis is processed with a circle flange connecting hole successively along its thickness direction and a circle pressing plate connects hole, the center of circle of described chassis upper disk surface is O, the center of circle O of one circle flange connecting hole near chassis is arranged, one circle pressing plate connection hole is arranged away from the center of circle O on chassis, described chassis upper disk surface is radially evenly processed with at least two handling grooves in direction, the O place, the center of circle of described chassis upper disk surface is processed with cylindrical boss along its dish body thickness direction, the outer wall of cylindrical boss is processed with a gap along its axial direction due, setting that large flange is sleeved on cylindrical boss and the interior ring plate of large flange matches with the end face of cylindrical boss, the outer circle wall of cylindrical boss matches with the inner peripheral wall of large flange setting, one circle of large flange vertically connects Kong Yuyi and encloses flange connecting hole and match setting, N number of pressing plate is positioned on chassis and is distributed on around large flange, between every two adjacent pressing plates, the span of angle is 6 �㡫15 ��, one circle pressing plate connects hole and comprises N number of handling hole, pressing plate and handling hole one_to_one corresponding are arranged, each pressing plate holds out against on the outer circle wall of large flange near one end of large flange, each pressing plate is detachably connected on the handling hole of correspondence of this pressing plate by a connection fixture.
A kind of fixture for clamping large flange, it comprises chassis, N number of connection fixture and N number of pressing plate, described chassis level is arranged, the dish body on described chassis is processed with a circle flange connecting hole successively along its thickness direction and a circle pressing plate connects hole, the center of circle of described chassis upper disk surface is O, the center of circle O of one circle flange connecting hole near chassis is arranged, one circle pressing plate connection hole is arranged away from the center of circle O on chassis, described chassis upper disk surface is radially evenly processed with at least two handling grooves in direction, the O place, the center of circle of described chassis upper disk surface is processed with circular groove along its dish body thickness direction, circular groove bottom land is processed with a gap, setting that large flange is arranged in circular groove and the outer circle wall of large flange matches with the inwall of circular groove, one circle of large flange vertically connects Kong Yuyi and encloses flange connecting hole and match setting, N number of pressing plate is positioned on chassis and is distributed on around large flange, between every two adjacent pressing plates, the span of angle is 6 �㡫15 ��, one circle pressing plate connects hole and comprises N number of handling hole, pressing plate and handling hole one_to_one corresponding are arranged, each pressing plate holds out against on the outer circle wall of large flange near one end of large flange, each pressing plate is detachably connected on the handling hole of correspondence of this pressing plate by a connection fixture.
The beneficial effects of the utility model are:
The utility model is a kind of simple structure and the general instrument of applicable thin wall component processing, by cooperatively interacting between chassis, cylindrical boss, N number of connection fixture and N number of pressing plate in scheme one, it is achieved large flange is in all adjustable effect of circumferential direction. By cooperatively interacting between chassis, circular groove, N number of connection fixture and N number of pressing plate in scheme two, it is achieved large flange is in all adjustable effect of circumferential direction. By the setting of at least two handling grooves on the gap of processing on cylindrical boss or circular groove and chassis be convenient to large flange in the process of clamping and dismounting outer circle wall without distortion. No matter flange size, wall thickness size, can realize regulating voluntarily and clamping at circumferential direction by the utility model, the utility model is especially applicable to larger-size large flange is carried out clamping, by clamping of the present utility model and location, large flange change in displacement in the course of processing is controlled at below 0.05mm.
Accompanying drawing explanation
Fig. 1 is the using state figure of scheme one in the utility model;
Fig. 2 is the plan structure schematic diagram on chassis 1 in scheme one, and loading and unloading groove 1-5 in figure is three;
Fig. 3 is the main TV structure schematic diagram on chassis 1;
Fig. 4 is the using state figure of scheme two in the utility model;
Fig. 5 is the plan structure schematic diagram on chassis 1 in scheme two, and loading and unloading groove 1-5 in figure is three;
Fig. 6 is the sectional view at A-A place in Fig. 5;
Fig. 7 is the enlarged view at B place in Fig. 6;
Fig. 8 is the main TV structure schematic diagram of pressing plate 4;
Fig. 9 is the left view of Fig. 5.
Embodiment
Embodiment one: composition graphs 1, Fig. 2, Fig. 3, Fig. 8 and Fig. 9 explanation, present embodiment comprises chassis 1, N number of connection fixture 3 and N number of pressing plate 4, described chassis 1 is horizontally disposed with, the dish body on described chassis 1 is processed with a circle flange connecting hole 1-1 and circle pressing plate successively along its thickness direction and connects hole 1-2, the center of circle of described chassis 1 upper disk surface is O, the center of circle O of one circle flange connecting hole 1-1 near chassis 1 is arranged, one circle pressing plate connection hole 1-2 is arranged away from the center of circle O on chassis 1, described chassis 1 upper disk surface is radially evenly processed with at least two handling groove 1-5 in direction, the O place, the center of circle of described chassis 1 upper disk surface is processed with cylindrical boss 1-3 along its dish body thickness direction, the outer wall of cylindrical boss 1-3 is processed with a gap 1-4 along its axial direction due, setting that large flange 5 is sleeved on cylindrical boss 1-3 and the interior ring plate 5-1 of large flange 5 matches with the end face of cylindrical boss 1-3, the outer circle wall of cylindrical boss 1-3 matches with the inner peripheral wall of large flange 5 setting, one circle of large flange 5 vertically connects hole 5-2 and encloses flange connecting hole 1-1 with one and match setting, N number of pressing plate 4 is positioned on chassis 1 and is distributed on large flange 5 around, between every two adjacent pressing plates 4, the span of angle is 6 �㡫15 ��, one circle pressing plate connects hole 1-2 and comprises N number of handling hole, pressing plate 4 is arranged with handling hole one_to_one corresponding, each pressing plate 4 holds out against on the outer circle wall of large flange 5 near one end of large flange 5, each pressing plate 4 is detachably connected on the handling hole of correspondence of this pressing plate 4 by a connection fixture 3.
In present embodiment, large flange 5 is the flange that in a kind of steam turbine, work turbine uses, this flange size is bigger, its external diameter is about 700mm, large flange 5 inwall is fixedly connected with an interior ring plate 5-1, large flange 5 is round shape, the barrel of large flange 5 is evenly processed with a circle along its axial direction due and vertically connects hole 5-2, one circle vertically connects hole 5-2 and comprises multiple first through hole, one circle flange connecting hole 1-1 comprises multiple 2nd through hole, and the first through hole and the 2nd through hole one_to_one corresponding are arranged and removably connected by bolt. The size of pressing plate 4 becomes to need the type of the large flange 5 of location, and dissimilar large flange 5 is to the pressing plate 4 that should have different size.
In present embodiment, the setting of gap 1-4 is convenient to large flange 5 and is placed on cylindrical boss 1-3, effectively reduces the distortion that large flange 5 produces in placement process. Article at least two, the placement groove of crow bar when to load and unload groove 1-5 be dismounting, minimum degree make the outer circumference surface of large flange 5 from injury, Reducing distortion.
In present embodiment, between two adjacent pressing plates 4, the span of angle is 6 �㡫15 ��, and so arranging is to make the locating effect of pressing plate 4 stable and even.
Present embodiment utilizes lathe peripheral pressing plate fixation method to be fixed on chassis 1.
Embodiment two: composition graphs 1 illustrates, in present embodiment, each connection fixture 3 comprises threaded stud 3-1 and hex-nut 3-2, is threaded between threaded stud 3-1 and hex-nut 3-2. Threaded stud 3-1 and hex-nut 3-2 easy to drawing materials and with low cost. Other structure do not mentioned and connection relation are identical with embodiment one.
Embodiment three: present embodiment is that embodiment two limits further, N number of handling hole that a circle pressing plate connects in the 1-2 of hole is threaded hole. Threaded hole makes the utility model part 3 that allows to be fixedly connected better that large flange 5 is carried out clamping.
Embodiment four: composition graphs 2 illustrates present embodiment, the central angle that in present embodiment, gap 1-4 is corresponding is ��, and the span of central angle alpha is 36 �㡫72 ��. Drawing according to specimen test, the central angle of gap 1-4 is advisable in 1st/1st to five/10th of 360 ��. The gap 1-4 shape so arranged rationally and can provide effective space for handling large flange 5. Other structure do not mentioned and connection relation are identical with embodiment one or three.
Embodiment five: composition graphs 8 and Fig. 9 illustrate present embodiment, in present embodiment, each pressing plate 4 is processed with circular hole or waist hole along its plate face thickness direction. On present embodiment center platen 4, circular hole or waist hole require to determine according to concrete drawing. Other structure do not mentioned and connection relation are identical with embodiment four.
Embodiment six: composition graphs 2 illustrates, the upper disk surface of chassis 1 described in present embodiment is radially evenly processed with three handling groove 1-5 in direction. In present embodiment, the determination of three handling groove 1-5 draws according to specimen test, and the sled point of bikini is stable and rational structure, it is possible to avoid large flange 5 to offset in unloading process, collide with and problem on deformation occur. Other structure do not mentioned and connection relation are identical with embodiment five.
Embodiment seven: composition graphs 1 illustrates, in present embodiment, it also comprises ringbolt 2, and described ringbolt 2 is fixedly connected on the outer circle wall on chassis 1. The setting of ringbolt 2 is for the ease of the utility model of slinging, thus convenient carrying. Other structure do not mentioned and connection relation are identical with embodiment six.
Embodiment eight: composition graphs 5, Fig. 6, Fig. 7, Fig. 8 and Fig. 9 explanation, present embodiment comprises chassis 1, N number of connection fixture 3 and N number of pressing plate 4, described chassis 1 is horizontally disposed with, the dish body on described chassis 1 is processed with a circle flange connecting hole 1-1 and circle pressing plate successively along its thickness direction and connects hole 1-2, the center of circle of described chassis 1 upper disk surface is O, the center of circle O of one circle flange connecting hole 1-1 near chassis 1 is arranged, one circle pressing plate connection hole 1-2 is arranged away from the center of circle O on chassis 1, described chassis 1 upper disk surface is radially evenly processed with at least two handling groove 1-5 in direction, the O place, the center of circle of described chassis 1 upper disk surface is processed with circular groove 1-6 along its dish body thickness direction, circular groove 1-6 bottom land is processed with a gap 1-4, setting that large flange 5 is arranged in circular groove 1-6 and the outer circle wall of large flange 5 matches with the inwall of circular groove 1-6, one circle of large flange 5 vertically connects hole 5-2 and encloses flange connecting hole 1-1 with one and match setting, N number of pressing plate 4 is positioned on chassis 1 and is distributed on large flange 5 around, between every two adjacent pressing plates 4, the span of angle is 6 �㡫15 ��, one circle pressing plate connects hole 1-2 and comprises N number of handling hole, pressing plate 4 is arranged with handling hole one_to_one corresponding, each pressing plate 4 holds out against on the outer circle wall of large flange 5 near one end of large flange 5, each pressing plate 4 is detachably connected on the handling hole of correspondence of this pressing plate 4 by a connection fixture 3.
In present embodiment, large flange 5 is the flange that in a kind of steam turbine, work turbine uses, this flange size is bigger, its external diameter is about 700mm, large flange 5 inwall is fixedly connected with an interior ring plate 5-1, large flange 5 is round shape, the barrel of large flange 5 is evenly processed with a circle along its axial direction due and vertically connects hole 5-2, one circle vertically connects hole 5-2 and comprises multiple first through hole, one circle flange connecting hole 1-1 comprises multiple 2nd through hole, and the first through hole and the 2nd through hole one_to_one corresponding are arranged and removably connected by bolt. The size of pressing plate 4 becomes to need the type of the large flange 5 of location, and dissimilar large flange 5 is to the pressing plate 4 that should have different size.
In present embodiment, the setting of gap 1-4 is convenient to large flange 5 and is placed on circular groove 1-6, effectively reduces the distortion that large flange 5 produces in placement process. Article at least two, the placement groove of crow bar when to load and unload groove 1-5 be dismounting, minimum degree make the outer circumference surface of large flange 5 from injury, Reducing distortion.
In present embodiment, between two adjacent pressing plates 4, the span of angle is 6 �㡫15 ��, and so arranging is to make the locating effect of pressing plate 4 stable and even.
In present embodiment, the O place, the center of circle of the dish body on chassis 1 is also processed with the through hole that lathe connects, the through hole that this lathe connects is used for being connected with the Machine tool pressure plate in lathe realizing the effective location to chassis 1, and the aperture of the through hole that this lathe connects is less than the internal diameter of circular groove 1-6.
Embodiment nine: composition graphs 5 illustrates, in present embodiment, each connection fixture 3 comprises threaded stud 3-1 and hex-nut 3-2, is threaded between threaded stud 3-1 and hex-nut 3-2. Threaded stud 3-1 and hex-nut 3-2 easy to drawing materials and with low cost. Other structure do not mentioned and connection relation are identical with embodiment eight.
Embodiment ten: composition graphs 5 illustrates, also comprises ringbolt 2 in present embodiment, described ringbolt 2 is fixedly connected on the outer circle wall on chassis 1. The setting of ringbolt 2 is for the ease of the utility model of slinging, thus convenient carrying. Other structure do not mentioned and connection relation are identical with embodiment nine.
Working process:
The working process of scheme one: first large flange 5 is sleeved on the cylindrical boss 1-3 on chassis 1, choose and N number of pressing plate 4 of this large flange 5 appropriate length, one by one N number of pressing plate 4 is held out against on the outer circle wall of large flange 5, and by N number of connection fixture 3, N number of pressing plate 4 is connected with chassis 1 one by one. When specifically operating, utilizing lever principle spanner tight threaded stud 3-1 and hex-nut 3-2, adjusting the radial position of pressing plate 4 with hammer until reaching adjustment flange benchmark, rule circle post-treatment.
The working process of scheme two: first large flange 5 is placed in the circular groove 1-6 on chassis 1, choose and N number of pressing plate 4 of this large flange 5 appropriate length, one by one N number of pressing plate 4 is held out against on the outer circle wall of large flange 5, and by N number of connection fixture 3, N number of pressing plate 4 is connected with chassis 1 one by one. When specifically operating, utilizing lever principle spanner tight threaded stud 3-1 and hex-nut 3-2, adjusting the radial position of pressing plate 4 with hammer until reaching adjustment flange benchmark, rule circle post-treatment.
Claims (10)
1. the fixture for clamping large flange, it is characterized in that: it comprises chassis (1), N number of connection fixture (3) and N number of pressing plate (4), described chassis (1) is horizontally disposed with, the dish body on described chassis (1) is processed with a circle flange connecting hole (1-1) successively along its thickness direction and a circle pressing plate connects hole (1-2), the center of circle of described chassis (1) upper disk surface is O, one circle flange connecting hole (1-1) is arranged near the center of circle O on chassis (1), one circle pressing plate connection hole (1-2) is arranged away from the center of circle O of chassis (1), described chassis (1) upper disk surface is radially evenly processed with at least two handling groove (1-5) in direction, the O place, the center of circle of described chassis (1) upper disk surface is processed with cylindrical boss (1-3) along its dish body thickness direction, the outer wall of cylindrical boss (1-3) is processed with a gap (1-4) along its axial direction due, setting that large flange (5) is sleeved on cylindrical boss (1-3) and the interior ring plate (5-1) of large flange (5) matches with the end face of cylindrical boss (1-3), the outer circle wall of cylindrical boss (1-3) matches with the inner peripheral wall of large flange (5) setting, one circle of large flange (5) vertically connects hole (5-2) and encloses flange connecting hole (1-1) with one and match setting, N number of pressing plate (4) is positioned at chassis (1) and above and is distributed on large flange (5) around, between every two adjacent pressing plates (4), the span of angle is 6 �㡫15 ��, one circle pressing plate connects hole (1-2) and comprises N number of handling hole, pressing plate (4) is arranged with handling hole one_to_one corresponding, each pressing plate (4) holds out against on the outer circle wall of large flange (5) near one end of large flange (5), each pressing plate (4) is detachably connected on the handling hole of correspondence of this pressing plate (4) by a connection fixture (3).
2. a kind of fixture for clamping large flange according to claim 1, it is characterized in that: each connection fixture (3) comprises threaded stud (3-1) and hex-nut (3-2), is threaded between threaded stud (3-1) and hex-nut (3-2).
3. a kind of fixture for clamping large flange according to claim 2, it is characterised in that: N number of handling hole that a circle pressing plate connects in hole (1-2) is threaded hole.
4. a kind of fixture for clamping large flange according to claim 1 or 3, it is characterised in that: the central angle that gap (1-4) is corresponding is ��, and the span of central angle alpha is 36 �㡫72 ��.
5. a kind of fixture for clamping large flange according to claim 4, it is characterised in that: each pressing plate (4) is processed with circular hole or waist hole along its plate face thickness direction.
6. a kind of fixture for clamping large flange according to claim 5, it is characterised in that: described chassis (1) upper disk surface is radially evenly processed with three handling groove (1-5) in direction.
7. a kind of fixture for clamping large flange according to claim 6, it is characterised in that: it also comprises ringbolt (2), and described ringbolt (2) is fixedly connected on the outer circle wall of chassis (1).
8. the fixture for clamping large flange, it is characterized in that: it comprises chassis (1), N number of connection fixture (3) and N number of pressing plate (4), described chassis (1) is horizontally disposed with, the dish body on described chassis (1) is processed with a circle flange connecting hole (1-1) successively along its thickness direction and a circle pressing plate connects hole (1-2), the center of circle of described chassis (1) upper disk surface is O, one circle flange connecting hole (1-1) is arranged near the center of circle O on chassis (1), one circle pressing plate connection hole (1-2) is arranged away from the center of circle O of chassis (1), described chassis (1) upper disk surface is radially evenly processed with at least two handling groove (1-5) in direction, the O place, the center of circle of described chassis (1) upper disk surface is processed with circular groove (1-6) along its dish body thickness direction, circular groove (1-6) bottom land is processed with a gap (1-4), setting that large flange (5) is arranged in circular groove (1-6) and the outer circle wall of large flange (5) matches with the inwall of circular groove (1-6), one circle of large flange (5) vertically connects hole (5-2) and encloses flange connecting hole (1-1) with one and match setting, N number of pressing plate (4) is positioned at chassis (1) and above and is distributed on large flange (5) around, between every two adjacent pressing plates (4), the span of angle is 6 �㡫15 ��, one circle pressing plate connects hole (1-2) and comprises N number of handling hole, pressing plate (4) is arranged with handling hole one_to_one corresponding, each pressing plate (4) holds out against on the outer circle wall of large flange (5) near one end of large flange (5), each pressing plate (4) is detachably connected on the handling hole of correspondence of this pressing plate (4) by a connection fixture (3).
9. a kind of fixture for clamping large flange according to claim 8, it is characterized in that: each connection fixture (3) comprises threaded stud (3-1) and hex-nut (3-2), is threaded between threaded stud (3-1) and hex-nut (3-2).
10. a kind of fixture for clamping large flange according to claim 9, it is characterised in that: it also comprises ringbolt (2), and described ringbolt (2) is fixedly connected on the outer circle wall of chassis (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620046246.7U CN205271505U (en) | 2016-01-18 | 2016-01-18 | A anchor clamps for clamping large flange |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620046246.7U CN205271505U (en) | 2016-01-18 | 2016-01-18 | A anchor clamps for clamping large flange |
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| CN205271505U true CN205271505U (en) | 2016-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620046246.7U Active CN205271505U (en) | 2016-01-18 | 2016-01-18 | A anchor clamps for clamping large flange |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106475575A (en) * | 2016-12-07 | 2017-03-08 | 贵州黎阳航空动力有限公司 | A kind of large-scale one side no flange shell turning processing method and device |
| CN106736649A (en) * | 2016-12-23 | 2017-05-31 | 贵州黎阳航空动力有限公司 | A kind of fixture for the yielding mouse cage part of thin-walled |
| CN106808246A (en) * | 2017-03-01 | 2017-06-09 | 南京航空航天大学 | Thin-wall annular part processing method and its automatic auxiliary support apparatus |
| CN107900664A (en) * | 2017-11-29 | 2018-04-13 | 西南石油大学 | One kind is got rusty bolt more changing device online |
| CN108723814A (en) * | 2018-04-24 | 2018-11-02 | 湖南大学 | A kind of thin-walled revolving meber flange face drilling-milling clamper |
| CN110315361A (en) * | 2019-06-27 | 2019-10-11 | 中国航发贵州黎阳航空动力有限公司 | For guaranteeing the method and device of metal plate forming thin-wall circular ring wall thickness |
| CN112719910A (en) * | 2020-12-21 | 2021-04-30 | 内蒙古北方重工业集团有限公司 | Large-scale thin-tooth-arc part machining process device and machining method |
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2016
- 2016-01-18 CN CN201620046246.7U patent/CN205271505U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106475575A (en) * | 2016-12-07 | 2017-03-08 | 贵州黎阳航空动力有限公司 | A kind of large-scale one side no flange shell turning processing method and device |
| CN106736649A (en) * | 2016-12-23 | 2017-05-31 | 贵州黎阳航空动力有限公司 | A kind of fixture for the yielding mouse cage part of thin-walled |
| CN106736649B (en) * | 2016-12-23 | 2018-09-25 | 贵州黎阳航空动力有限公司 | A kind of fixture for the yielding mouse cage part of thin-walled |
| CN106808246A (en) * | 2017-03-01 | 2017-06-09 | 南京航空航天大学 | Thin-wall annular part processing method and its automatic auxiliary support apparatus |
| CN107900664A (en) * | 2017-11-29 | 2018-04-13 | 西南石油大学 | One kind is got rusty bolt more changing device online |
| CN108723814A (en) * | 2018-04-24 | 2018-11-02 | 湖南大学 | A kind of thin-walled revolving meber flange face drilling-milling clamper |
| CN110315361A (en) * | 2019-06-27 | 2019-10-11 | 中国航发贵州黎阳航空动力有限公司 | For guaranteeing the method and device of metal plate forming thin-wall circular ring wall thickness |
| CN112719910A (en) * | 2020-12-21 | 2021-04-30 | 内蒙古北方重工业集团有限公司 | Large-scale thin-tooth-arc part machining process device and machining method |
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