CN114700505A - Method and device for machining ultra-long and ultra-thin sleeve type part - Google Patents
Method and device for machining ultra-long and ultra-thin sleeve type part Download PDFInfo
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- CN114700505A CN114700505A CN202210406958.5A CN202210406958A CN114700505A CN 114700505 A CN114700505 A CN 114700505A CN 202210406958 A CN202210406958 A CN 202210406958A CN 114700505 A CN114700505 A CN 114700505A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B1/00—Methods for turning or working essentially requiring the use of turning-machines; Use of auxiliary equipment in connection with such methods
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B5/00—Turning-machines or devices specially adapted for particular work; Accessories specially adapted therefor
- B23B5/26—Turning-machines or devices specially adapted for particular work; Accessories specially adapted therefor for simultaneously turning internal and external surfaces of a body
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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Abstract
The invention relates to the technical field of machining and clamps, in particular to a method and a device for machining an ultra-long and ultra-thin sleeve part. The invention adopts a turning mode, the final processing of an inner hole is finished on a vertical numerical control lathe, the final processing of an outer circle is finished on a horizontal numerical control lathe, the processing sequence is that the hole is processed first and then the outer circle, the processing of the inner hole adopts the clamping of a slotted sleeve, the processing of the outer circle adopts the technical scheme that a thin-wall sleeve special device for changing the direction of clamping force is used for clamping, and the like, and the processing of the ultra-long and ultra-thin sleeve part is finished by three procedures of rough turning of the outer circle, inner hole turning and fine turning of the outer circle. The special device for the thin-wall sleeve consists of an installation mandrel, a positioning sleeve, a pressure plate, a gasket and a compression nut, and the clamping force direction is changed from the radial direction to the axial direction. The special device for the slotted sleeve and the thin-wall sleeve is adopted to ensure the requirements of the size, the shape, the position precision and the surface roughness of the inner hole and the outer circle of the ultra-long and ultra-thin sleeve part. The beneficial effects are as follows: the process method is simple, can be completed by one processing mode, and has high production efficiency and processing quality.
Description
Technical Field
The invention relates to the technical field of machining and clamps, in particular to a process method for ensuring the manufacturing quality and the production efficiency of thin-wall sleeve parts, and specifically relates to a method and a device for machining an ultra-long and ultra-thin sleeve part.
Background
An existing sleeve part is shown in figure 1 and is used for installing a sleeve for a hood of a certain aviation aircraft, the sleeve is made of stainless steel, and manufacturing accuracy of the sleeve part plays a key role in product assembly. One end of the sleeve part is step-shaped, the diameter of an outer circle is phi 149.15mm, the wall thickness is 0.525mm, the depth reaches 366mm, the roughness of the inner circle and the outer circle is 0.8 mu m, the roundness is not more than 0.05mm, and the coaxiality of the inner circle and the outer circle to a step inner hole is not more than 0.03mm, so the sleeve belongs to an ultra-long and ultra-thin sleeve part.
Disclosure of Invention
The invention aims to provide a method and a device for machining an ultra-long and ultra-thin sleeve part, which are used for solving the problems in the prior art and ensuring the shape, position and surface machining precision of the ultra-long and ultra-thin sleeve part.
The technical scheme adopted by the invention for solving the technical problems is as follows: the machining mode is turning, the inner hole finish machining is completed on a vertical numerical control lathe, and the outer circle finish machining is completed on a horizontal numerical control lathe; the processing sequence is that an inner hole is firstly finished, and then an outer circle is processed by positioning the inner hole, namely the sequence of the inner hole and the outer circle is carried out; the inner hole is clamped by a slotted sleeve, and the outer circle is clamped by a thin-wall sleeve special device for changing the direction of the clamping force. The method specifically comprises the following steps:
a. rough turning of an outer circle: clamping an inner hole by a numerical control vertical lathe, turning an outer circle to phi 155, and ensuring the straightness, roundness and verticality of the outer circle of the workpiece in the length direction to be used as a reference when the inner hole is turned;
b. turning an inner hole: clamping the excircle at the step of an ultra-long ultra-thin sleeve part 2 by a three-jaw chuck through a slotted sleeve 1 on a vertical numerical control lathe, wherein the cutter uses a high-strength inner bore turning tool 3, the blade adopts a plating blade with a small back angle, a large front angle and a round angle of R0.2-0.4, the cutting speed is 100R/min, the cutting depth is 2mm, the feeding amount is 0.2mm/R, the cutting depth is gradually reduced by 0.5mm every time of cutting, the cutting speed is unchanged until the machining allowance reaches 0.5mm, the cutting depth is 0.1mm, the feeding amount is 0.1-0.15 mm/R, machining of an inner hole, a thin-wall inner hole and an end face of the step is completed, and the machining tolerance range of the thin-wall inner hole is controlled to meet the requirement of dimensional tolerance and the fit clearance of the outer circle with the positioning of an installation mandrel 4 of a thin-wall sleeve special device is 0-0.01 mm.
c. Finely turning the outer circle: the method comprises the steps of installing a workpiece on a special thin-wall sleeve device, clamping the special thin-wall sleeve device by a three-jaw chuck and a tip for a horizontal numerically controlled lathe, wherein the cutting rotating speed is 350-400 r/min, the cutting depth is 0.5mm, the feeding amount is 0.1-0.15 mm/r, when the thickness of the thin wall is close to 2mm, the cutting rotating speed is unchanged, the cutting depth is 0.1-0.2 mm, the feeding amount is 0.1mm/r, and turning the outer circle to the designed size.
A thin wall sleeve special device used in the processing method and the device of the super-long and super-thin sleeve part is composed of an installation core shaft 4, a positioning sleeve 5, a pressure plate 6, a gasket 7 and a compression nut 8; installation dabber 4 comprises clamping excircle 9, location excircle 10, tapering excircle 11, support excircle 12 and double-screw bolt 13, and double-screw bolt 13 right-hand member sets up the centre bore, and the axiality of centre bore and each excircle is not more than 0.02mm, and location excircle 10 is 0 ~ 0.01mm with the thin wall hole fit clearance of the ultra-long ultra-thin cover part 2, and length is 5mm apart from 9 right-hand members faces of clamping excircle, and the tapering of the tapering excircle 11 that links to each other with it is 1: 1000, the length of the taper excircle 11 is 1mm less than the depth of a thin-wall inner hole of the ultra-long ultra-thin sleeve part 2, the positioning excircle 10 is used for positioning the radial direction of the ultra-long ultra-thin sleeve part 2, and the right end face of the taper excircle 11 is used for positioning the axial direction of the ultra-long ultra-thin sleeve part 2; the inner hole of the positioning sleeve 5 is matched with a supporting outer circle 12 of the mounting core shaft 4, the outer circle is matched with a step inner hole of the ultra-long ultra-thin sleeve part 2, the thickness of the positioning sleeve is 1-2mm smaller than the length of the step inner hole of the ultra-long ultra-thin sleeve part 2, and the positioning sleeve 5 positions the radial direction of the ultra-long ultra-thin sleeve part 2 and enables the thin-wall inner hole to be coaxial with the step inner hole; the pressure plate 6, the washer 7 and the compression nut 8 are arranged on a stud 13 of the installation mandrel 4, and the ultra-long and ultra-thin sleeve part 2 is fastened on the installation mandrel 4, so that the clamping force direction of the ultra-long and ultra-thin sleeve part 2 is changed from radial clamping to axial clamping. After the processing of the ultra-long ultra-thin sleeve part 2 is completed, the loading and unloading of the ultra-long ultra-thin sleeve part 2 on the installation mandrel 4 can be easily completed through the taper excircle 11 of the installation mandrel 4 after the compression nut 8, the gasket 7 and the pressing plate 6 are disassembled.
The invention has the beneficial effects that: the process method is simple, can be completed by one processing mode, and has high production efficiency and processing quality. The clamping area is increased by adopting the slotted sleeve for clamping, the local clamping force is changed into a clamping force mechanism, the clamping deformation is reduced, the thin-wall inner hole and the step inner hole of the ultra-long ultra-thin sleeve part 2 are turned once after being clamped once, and the requirements of the size, the shape, the position precision and the surface roughness of the inner hole are ensured; the direction of the clamping force is changed by adopting a special device for the thin-wall sleeve, the direction of the clamping force is changed from the radial direction to the axial direction, the clamping force is designed at two end faces of a step hole of the ultra-long ultra-thin sleeve part 2, the axial rigidity and the strength are highest at the position, the clamping force is uniformly distributed, the deformation caused by the clamping force, the cutting heat and the like is overcome because the axial direction of a thin-wall inner hole of the ultra-long ultra-thin sleeve part 2 is in a free state, the straight line of a workpiece does not generate conicity and elastic deformation when the excircle is turned, and the requirements of the size, the shape, the position precision and the surface roughness of the machined excircle are ensured.
Drawings
FIG. 1 is a schematic view of a structure of an ultra-long and ultra-thin sleeve part
FIG. 2 is a schematic view of an inner hole of an ultra-long and ultra-thin sleeve part
FIG. 3 is a schematic structural view of a device dedicated for machining an outer circle and a thin-wall sleeve of an ultra-long ultra-thin sleeve part
FIG. 4 is a schematic view of the installation mandrel structure of the device dedicated for thin-walled sleeve
In the figure: 1. the device comprises a slotted sleeve, 2 parts of an ultra-long ultra-thin sleeve, 3 parts of a high-strength inner bore lathe tool, 4 parts of an installation mandrel, 5 parts of a positioning sleeve, 6 parts of a pressing plate, 7 parts of a gasket, 8 parts of a compression nut, 9 parts of a clamping excircle, 10 parts of a positioning excircle, 11 parts of a taper excircle, 12 parts of a supporting excircle and 13 parts of a stud.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
As shown in figure 1, the ultra-long and ultra-thin sleeve part has the requirements on the size and shape precision, the higher position precision and the smaller roughness value on the inner hole and the outer circle surface of the thin wall, and the surface roughness can not be ensured by adopting processing methods such as boring, grinding and the like due to the stepped hole. Therefore, the turning processing is selected as the processing mode, the final processing of the inner hole is finished on a vertical numerical control lathe, and the final processing of the outer circle is finished on a horizontal numerical control lathe; the processing sequence is that an inner hole is firstly finished, and then an outer circle is processed by positioning the inner hole, namely the sequence of the inner hole and the outer circle is carried out; the inner hole is machined by clamping a slotted sleeve, and the outer circle is machined by clamping a thin-wall sleeve special device for changing the direction of the clamping force.
The method specifically comprises the following steps:
a. rough turning of an outer circle: clamping an inner hole by a numerical control vertical lathe, turning an outer circle to phi 155, and ensuring the straightness, roundness and verticality of the outer circle of the workpiece in the length direction to be used as a reference when the inner hole is turned;
b. turning an inner hole: as shown in figure 2, a step outer circle of an ultra-long ultra-thin sleeve part 2 is clamped by a three-jaw chuck on a vertical numerical control lathe through a slotted sleeve 1, the cutter uses a high-strength inner bore turning tool 3, the blade adopts a plating blade with a small back angle, a large front angle and a round angle of R0.2-0.4, the cutting speed is 100R/min, the cutting depth is 2mm, the feeding amount is 0.2mm/R, the cutting depth is gradually reduced by 0.5mm every time of cutting, the cutting speed is unchanged until the machining allowance reaches 0.5mm, the cutting depth is 0.1mm, the feeding amount is 0.1-0.15 mm/R, the machining of a step inner hole, a thin-wall inner hole and an end face is completed, the machining tolerance range of the thin-wall inner hole is controlled to meet the requirement of dimensional tolerance, and the fit clearance with the positioning outer circle of an installation mandrel 4 of a special thin-wall sleeve device is 0-0.01 mm. The clamping area is increased by adopting the slotted sleeve for clamping, the local clamping force is changed into an even clamping force mechanism, the clamping deformation is reduced, the thin-wall inner hole and the step inner hole of the ultra-long ultra-thin sleeve part 2 are turned once after being clamped once, and the requirements of the size, the shape, the position precision and the surface roughness of the inner hole are met.
c. Finely turning the outer circle: as shown in figure 3, a workpiece is installed on a special device for a thin-wall sleeve, the special device for clamping the thin-wall sleeve by a three-jaw chuck and a tip for a horizontal numerical control lathe is used, the cutting rotating speed is 350-400 r/min, the cutting depth is 0.5mm, the feeding amount is 0.1-0.15 mm/r, when the thickness of the thin wall is close to 2mm, the cutting rotating speed is unchanged, the cutting depth is 0.1-0.2 mm, the feeding amount is 0.1mm/r, and the outer circle is turned to the designed size.
As shown in fig. 3, a thin-wall sleeve special device used in the method and device for processing the ultra-long and ultra-thin sleeve parts comprises an installation mandrel 4, a positioning sleeve 5, a pressure plate 6, a gasket 7 and a compression nut 8;
as shown in fig. 4, installation dabber 4 comprises clamping excircle 9, location excircle 10, tapering excircle 11, support excircle 12 and double-screw bolt 13, and double-screw bolt 13 right-hand member sets up the centre bore, and the axiality of centre bore and each excircle is not more than 0.02mm, and location excircle 10 is 0 ~ 0.01mm with the thin wall hole fit clearance of the ultra-long ultra-thin cover part 2, and length is apart from clamping excircle 9 right-hand member face 5mm, and the tapering of the tapering excircle 11 that links to each other with it is 1: 1000, the length of the taper excircle 11 is 1mm less than the depth of a thin-wall inner hole of the ultra-long ultra-thin sleeve part 2, the positioning excircle 10 is used for positioning the radial direction of the ultra-long ultra-thin sleeve part 2, and the right end face of the taper excircle 11 is used for positioning the axial direction of the ultra-long ultra-thin sleeve part 2; the inner hole of the positioning sleeve 5 is matched with a supporting outer circle 12 of the mounting mandrel 4, the outer circle is matched with a step inner hole of the ultra-long ultra-thin sleeve part 2, the thickness of the positioning sleeve is 1-2mm smaller than the length of the step inner hole of the ultra-long ultra-thin sleeve part 2, and the positioning sleeve 5 positions the ultra-long ultra-thin sleeve part 2 in the radial direction and enables the thin-wall inner hole to be coaxial with the step inner hole; the pressure plate 6, the washer 7 and the compression nut 8 are arranged on a stud 13 of the installation mandrel 4, and the ultra-long and ultra-thin sleeve part 2 is fastened on the installation mandrel 4, so that the clamping force direction of the ultra-long and ultra-thin sleeve part 2 is changed from radial to axial clamping.
After the processing of the ultra-long ultra-thin sleeve part 2 is completed, the loading and unloading of the ultra-long ultra-thin sleeve part 2 on the installation mandrel 4 can be easily completed through the taper excircle 11 of the installation mandrel 4 after the compression nut 8, the gasket 7 and the pressing plate 6 are disassembled.
The function of the special device for the thin-wall sleeve changes the direction of the clamping force, changes the direction of the clamping force from the radial direction to the axial direction, designs the clamping force on two end faces of a step hole of the ultra-long and ultra-thin sleeve part 2, wherein the axial rigidity and the strength of the part are highest, and ensures that the clamping force is uniformly distributed.
It should be understood that the above detailed description of the technical solution of the present invention with the help of preferred embodiments is illustrative and not restrictive. On the basis of reading the description of the invention, a person skilled in the art can modify the technical solutions described in the embodiments, or make equivalent substitutions for some technical features; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (4)
1. A processing method and a device for an ultra-long and ultra-thin sleeve part are characterized in that: the machining mode is turning, the inner hole finish machining is completed on a vertical numerical control lathe, and the outer circle finish machining is completed on a horizontal numerical control lathe; the processing sequence is that an inner hole is firstly finished, and then an outer circle is processed by positioning the inner hole, namely the sequence of the inner hole and the outer circle is carried out; the inner hole is clamped by a slotted sleeve, and the outer circle is clamped by a thin-wall sleeve special device for changing the direction of the clamping force.
2. The processing method and the device for the ultra-long and ultra-thin sleeve part according to the claim 1 are characterized in that: the method specifically comprises the following steps:
a. roughly turning the outer circle: clamping an inner hole by a numerical control vertical lathe, turning an outer circle to phi 155, and ensuring the straightness, roundness and verticality of the outer circle of the workpiece in the length direction to be used as a reference when the inner hole is turned;
b. turning an inner hole: clamping the excircle of the step of an ultra-long and ultra-thin sleeve part (2) by a three-jaw chuck on a vertical numerical control lathe through a slotted sleeve (1), wherein the cutter uses a high-strength inner bore lathe tool (3), the blade adopts a plating blade with a small back angle, a large front angle and a round angle of R0.2-0.4, the cutting speed is 100R/min, the cutting depth is 2mm, the feed rate is 0.2mm/R, the cutting depth is gradually reduced by 0.5mm every time of cutting, the cutting speed is unchanged until the machining allowance reaches 0.5mm, the cutting depth is 0.1mm, the feed rate is 0.1-0.15 mm/R, machining of the inner hole of the step, the inner hole of the thin wall and the end face is completed, the machining tolerance range of the inner hole of the thin wall is controlled to meet the requirement of dimensional tolerance, and the fit clearance with the positioning excircle of an installation mandrel (4) of a special device for the thin wall sleeve is 0-0.01 mm;
c. finely turning the outer circle: the method comprises the steps of installing a workpiece on a special thin-wall sleeve device, clamping the special thin-wall sleeve device by a three-jaw chuck and a tip for a horizontal numerically controlled lathe, wherein the cutting rotating speed is 350-400 r/min, the cutting depth is 0.5mm, the feeding amount is 0.1-0.15 mm/r, when the thickness of the thin wall is close to 2mm, the cutting rotating speed is unchanged, the cutting depth is 0.1-0.2 mm, the feeding amount is 0.1mm/r, and turning the outer circle to the designed size.
3. The processing method and the device for the ultra-long and ultra-thin sleeve part according to the claim 1 are characterized in that: the thin-wall sleeve special device consists of an installation mandrel (4), a positioning sleeve (5), a pressing plate (6), a gasket (7) and a compression nut (8); installation dabber (4) are by clamping excircle (9), location excircle (10), tapering excircle (11), support excircle (12) and double-screw bolt (13) to constitute, double-screw bolt (13) right-hand member sets up the centre bore, the centre bore is not more than 0.02mm with the axiality of each excircle, the thin wall hole fit clearance of location excircle (10) and ultra-long ultra-thin cover part (2) is 0 ~ 0.01mm, length is apart from clamping excircle (9) right-hand member face 5mm, the tapering of tapering excircle (11) that links to each other with it is 1: 1000, the length of the taper excircle (11) is 1mm less than the depth of a thin-wall inner hole of the ultra-long ultra-thin sleeve part (2), the positioning excircle (10) positions the radial direction of the ultra-long ultra-thin sleeve part (2), and the right end face of the taper excircle (11) positions the axial direction of the ultra-long ultra-thin sleeve part (2); the inner hole of the positioning sleeve (5) is matched with a supporting outer circle (12) of the mounting core shaft (4), the outer circle is matched with a step inner hole of the ultra-long ultra-thin sleeve part (2), the thickness of the outer circle is 1-2mm smaller than the length of the step inner hole of the ultra-long ultra-thin sleeve part (2), and the positioning sleeve (5) positions the ultra-long ultra-thin sleeve part (2) in the radial direction and enables the thin-wall inner hole to be coaxial with the step inner hole; the pressing plate (6), the washer (7) and the compression nut (8) are arranged on a stud (13) of the installation mandrel (4), and the ultra-long ultra-thin sleeve part (2) is fastened on the installation mandrel (4), so that the clamping force direction of the ultra-long ultra-thin sleeve part (2) is changed from radial to axial clamping.
4. The processing method and the device for the ultra-long and ultra-thin sleeve part according to the claim 1 are characterized in that: after the ultra-long ultra-thin sleeve part (2) is processed, the compression nut (8), the gasket (7) and the pressing plate (6) are disassembled, and the ultra-long ultra-thin sleeve part (2) can be easily assembled and disassembled on the installation mandrel (4) through the taper excircle (11) of the installation mandrel (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210406958.5A CN114700505A (en) | 2022-04-19 | 2022-04-19 | Method and device for machining ultra-long and ultra-thin sleeve type part |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210406958.5A CN114700505A (en) | 2022-04-19 | 2022-04-19 | Method and device for machining ultra-long and ultra-thin sleeve type part |
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| CN202210406958.5A Pending CN114700505A (en) | 2022-04-19 | 2022-04-19 | Method and device for machining ultra-long and ultra-thin sleeve type part |
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| CN211708847U (en) * | 2020-01-19 | 2020-10-20 | 苏州联开精密模具有限公司 | Thin wall pipe class part finish machining is with supplementary fixing device |
| CN114260738A (en) * | 2021-12-20 | 2022-04-01 | 山西平阳重工机械有限责任公司 | High-precision thin-wall type half-coupling turning tool and method |
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2022
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110120278A1 (en) * | 2008-07-25 | 2011-05-26 | Ihi Corporation | Method of cutting thin-walled material |
| CN102922234A (en) * | 2012-10-31 | 2013-02-13 | 贵州航飞精密制造有限公司 | Process for processing external threads of thin-wall threaded sleeve and threaded sleeve turning clamp used for same |
| CN103949851A (en) * | 2014-04-16 | 2014-07-30 | 贵州凯星液力传动机械有限公司 | Processing method of aluminum alloy thin-wall cylindrical part |
| CN104476117A (en) * | 2014-10-30 | 2015-04-01 | 上海飞机制造有限公司 | High-accuracy thin-wall bush machining method |
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