CN114833599B - Machining tool and machining method for electromechanical gyro frame assembly - Google Patents

Machining tool and machining method for electromechanical gyro frame assembly Download PDF

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CN114833599B
CN114833599B CN202210331289.XA CN202210331289A CN114833599B CN 114833599 B CN114833599 B CN 114833599B CN 202210331289 A CN202210331289 A CN 202210331289A CN 114833599 B CN114833599 B CN 114833599B
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positioning
pontoon
processed
cylinder section
diameter cylinder
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CN114833599A (en
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柳亚楠
张昌星
陈雨沼
闵鹏
邢康
尹栋
万莉
宋月军
阮志峰
孙亮
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Xian Aerospace Precision Electromechanical Institute
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Xian Aerospace Precision Electromechanical Institute
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q2703/00—Work clamping
    • B23Q2703/02—Work clamping means
    • B23Q2703/10—Devices for clamping workpieces of a particular form or made from a particular material

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  • Mechanical Engineering (AREA)
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Abstract

The invention relates to a machining tool and a machining method for an electromechanical gyro frame assembly, which aim to solve the technical problems that a float frame is required to be matched one by one when combined with a thin-wall member float bowl, the machining efficiency is low, and the machining tool and the machining method are not suitable for mass production. The double-positioning tensioning clamp in the tool comprises a first clamp seat and a positioning shaft which are coaxially arranged; the outer end surface of the positioning shaft is matched with the inner side of the pontoon to be processed; the pressing end face clamp comprises a pressing seat, a locking sleeve and a locking nut; the compressing seat comprises a locating sleeve, a locating flange and a second clamp seat which are coaxially arranged. The method comprises the steps of 1, turning end surfaces of two ends of a long-diameter cylinder section of a pontoon by using a first double-positioning tensioning clamp; 2. turning a first positioning inner hole and a second positioning inner hole of the buoy to be processed by using a pressing end surface clamp; 3. turning the outer circular surface of the short-diameter cylindrical section and the right end surface of the short-diameter cylindrical section by using a second double-positioning tensioning clamp; 4. processing a float frame; 5. and (5) assembling.

Description

Machining tool and machining method for electromechanical gyro frame assembly
Technical Field
The invention relates to machining of an electromechanical gyro frame assembly, in particular to a machining tool of the electromechanical gyro frame assembly and a method for machining the electromechanical gyro frame assembly by adopting the machining tool.
Background
In recent years, the electromechanical gyroscopes occupy the market of gyroscopic products, so that the improvement of the production efficiency of the electromechanical gyroscopes, in particular the improvement of the production efficiency of the frame assembly, is the focus of research by those skilled in the art.
The electromechanical gyro frame assembly is one key part of electromechanical gyro, and has motor inside, pre-vacuumized high purity helium or hydrogen filled with suspension liquid, float balancing mechanism in the two ends and pivot in the middle. The level of the frame assembly design and manufacturing process directly determines the level of accuracy of the electromechanical gyroscopes. In addition, the frame assembly has extremely high air tightness requirement, wherein the pontoon and the floater frame form small clearance fit through two excircles and two inner holes with high precision, the fit clearance is only 0.006 mm-0.008 mm, two excircles of the floater frame are designed with two sealing grooves with the width of 0.7mm and the depth of 0.2mm, and industrial structural sealant is smeared to form a sealing body, so the pontoon and the floater frame are required to be assembled through the two excircles and the two inner holes with high precision to obtain the frame assembly with high precision, coaxiality and cylindricity.
The frame components are all made of aluminum bars 2A12-T4, the pontoon is a typical thin-wall part, the wall thickness at the thinnest part is only 0.4mm, the machining of the high-precision thin-wall part is a common machining difficulty, the machining difficulty of the thin-wall part is that the deformation of the part, the dimensional precision and the shape and position precision of the part are controlled, and a precision machining technology and a precision machining method of the thin-wall part must be innovated in order to effectively solve the machining difficulty of the thin-wall part and improve the production efficiency.
Fig. 1 is a schematic diagram of a buoy structure, fig. 2 is a schematic diagram of a buoy frame structure, and fig. 3 is a schematic diagram of an assembled structure of a buoy and a buoy frame; first positioning outer circle phi C of float frame 02 1 With the first positioning inner hole phi B of the pontoon 01 1 Second positioning outer circle phi C of float frame 02 2 And a second positioning inner hole phi B of the pontoon 01 2 The outside of the pontoon 01 is cylindrical, and comprises a long-diameter cylindrical section and a short-diameter cylindrical section, wherein the axial length of the long-diameter cylindrical section is L A3 The axial length of the short diameter cylinder section is L A2 The axial length of the pontoon 01 is L A1 The method comprises the steps of carrying out a first treatment on the surface of the Because the pontoon 01 is a thin-walled part, the wall thickness is only 0.4mm, the pontoon is easy to deform after processing, the size and the cylindricity are not easy to control, and in principle, the pontoon is round with two inner holesThe column degree is controlled within 0.03mm, and the finished product is obtained. The original processing method is to process the first positioning inner hole phi B of the buoy 01 1 And a second positioning inner hole phi B 2 After that, the inner hole size of each float 01 has large difference, the float frame 02 is not suitable to be processed into uniform size, so that the actual sizes and cylindricity of the first positioning inner holes and the second positioning inner holes of all the floats 01 need to be measured, and then the first positioning excircle phi C of the float frame 02 is assembled and lathed for the sizes in a grouping way 1 And a second positioning outer circle phi C 2 To ensure that the float frame 02 and the float 01 are matched to the hand feeling slip fit.
The original processing method of the electromechanical gyro frame assembly comprises pontoon processing, pontoon frame processing and combined processing of the frame assembly. The specific process is that 1, pontoon processing: manually grinding two end surfaces of the pontoon to ensure that the axial dimension of the pontoon is L A1 The flatness of the two end surfaces is 0.002mm, and the parallelism is 0.003mm; taking the two end surfaces as reference, turning a first positioning inner hole phi B 1 And a second positioning inner hole phi B 2 Because the pontoon is a thin-walled part, the pontoon is easy to deform after processing, the size and cylindricity are not easy to control, and the actual size and cylindricity can not completely meet the size requirement. 2. Processing a floater frame: through several turning, milling and heat treatment, the first positioning outer circle phi C is finally positioned 1 And a second positioning outer circle phi C 2 And processing to the corresponding size, and reserving a margin of 0.2mm for the frame assembly matching procedure. 3. Machining a frame assembly: according to the first positioning inner hole phi B1 and the second positioning inner hole phi B of the actually measured pontoon 2 Is one by one matched with the first positioning excircle phi C of the float frame 1 And a second positioning outer circle phi C 2 Ensuring that the float frame and the pontoon are matched in a sliding way; 4. the outer circle phi B of the short-diameter cylinder section of the pontoon is turned by the left and right central holes of the top tip of the assembled frame assembly 3 And the right end face of the short-diameter cylinder section of the pontoon, so that the axial length L of the short-diameter cylinder section A2 Meets the requirements, and ensures the excircle phi B of the short-diameter cylinder section 3 Coaxiality with the first positioning inner hole and the second positioning inner hole and perpendicularity between the right end surface of the long-diameter cylinder section and the outer circular surface of the short-diameter cylinder section are in accordance with requirements.
The original electromechanical gyro frame assembly processing method has the advantages of long processing flow, time and labor consumption, lower processing efficiency, one-to-one vehicle matching, paired warehouse entry, no interchangeability and inapplicability to mass production.
Disclosure of Invention
The invention aims to solve the technical problems that a thin-wall member buoy in an electromechanical gyro frame assembly is easy to deform and low in cylindricity in the machining process, so that one-to-one vehicle matching is needed when the thin-wall member buoy is combined with a buoy frame, the machining efficiency is low, and the processing tool and the processing method of the electromechanical gyro frame assembly are not suitable for mass production.
The technical scheme of the invention is as follows:
the machining tool for the electromechanical gyro frame assembly is characterized in that:
the device comprises two double-positioning tensioning clamps and a pressing end surface clamp which have the same structure;
the double-positioning tensioning clamp comprises a first clamp seat and a positioning shaft which are coaxially arranged from left to right;
the positioning shaft is provided with a central hole which is opened on the right end surface and three cutting grooves which divide the positioning shaft into three sector blocks;
a tensioning conical surface is arranged at the opening of the central hole;
the outer end surface of the positioning shaft is sequentially provided with a first positioning annular surface, a transition surface and a second positioning annular surface from left to right, the first positioning annular surface is matched with the inner side surface of the long-diameter cylindrical section of the pontoon to be processed, and the second positioning annular surface is matched with the inner side surface of the short-diameter cylindrical section of the pontoon to be processed;
the compression end face clamp comprises a compression seat, a locking sleeve and a locking nut;
the compressing seat comprises a locating sleeve, a locating flange and a second clamp seat which are coaxially arranged from left to right;
the locking sleeve is sleeved on the positioning sleeve, an inner convex ring is arranged at the left end of the locking sleeve, and an outer convex ring is arranged at the right end of the locking sleeve;
a positioning step surface matched with the outer step surface of the pontoon to be processed is arranged in the positioning sleeve, and the left end surface of the positioning sleeve is a positioning end surface flush with the left end surface of the pontoon to be processed;
the locating flange lateral surface is provided with the external screw thread, lock nut and external screw thread cooperation for compress tightly outer bulge loop right-hand member face and locating flange left end face and interior bulge loop right-hand member face and locating sleeve left end face.
Further, an internal thread is arranged in the central hole and is used for being matched with an adaptive tensioning screw to expand three sector blocks to realize positioning and clamping of the double-positioning tensioning clamp.
The invention also provides a processing method of the electromechanical gyro frame assembly, which is characterized by comprising the following steps of:
s1, processing a pontoon:
s1.1, fixing a buoy to be processed by using a first double-positioning tensioning clamp, wherein a first positioning ring surface of the double-positioning tensioning clamp is matched with the inner side surface of a long-diameter cylindrical section of the buoy to be processed, and a second positioning ring surface of the double-positioning tensioning clamp is matched with the inner side surface of a short-diameter cylindrical section of the buoy to be processed; finish turning the end surfaces of the two ends of the long-diameter cylinder section of the pontoon to be processed, and ensuring that the end surfaces of the two ends of the long-diameter cylinder section are parallel;
s1.2, using a pressing end face clamp, and matching the end faces of the two ends of the long-diameter cylinder section of the pontoon to be processed after finish turning in the step S1.1 with the positioning end face and the positioning step face of the positioning sleeve, wherein the first positioning inner hole phi B of the pontoon to be processed is finish turned 1 And a second positioning inner hole phi B 2 Ensure the first positioning inner hole phi B 1 And a second positioning inner hole phi B 2 The dimensional consistency of (2) is within 0.002 mm;
s1.3, using a second positioning tensioning clamp, wherein a first positioning ring surface of the double positioning tensioning clamp is matched with the inner side surface of the long-diameter cylindrical section of the pontoon processed in the step S1.2, and a second positioning ring surface is matched with the inner side surface of the short-diameter cylindrical section of the pontoon processed in the step S1.2; finely turning the first positioning inner hole phi B in the step S1.2 1 And a second positioning inner hole phi B 2 Positioning and fixing the double positioning tensioning clamp, finely turning the outer circular surface of the short-diameter cylinder section and the right end surface of the short-diameter cylinder section to ensure that the outer circular phi B of the short-diameter cylinder section of the pontoon is formed 3 With the first positioning inner hole phi B 1 And a second positioning inner hole phi B 2 Is the same as that ofAxial length L of axial length and short diameter cylinder section A2 The perpendicularity between the right end surface of the long-diameter cylinder section and the outer circular surface of the short-diameter cylinder section meets the design requirement;
s2, processing a float frame:
determining a first positioning excircle phi C of the float frame according to the metering size of the float after S1.3 processing 1 And a second positioning outer circle phi C 2 Then the first positioning excircle and the second positioning excircle of the float frame are processed by taking the processing dimension as a standard to finish the processing of the float frame, and the fit clearance between the float and the float frame is required to be 0.002 mm-0.004 mm;
s3, assembling the pontoon processed in the step S1 and the floater frame processed in the step S2 into the electromechanical gyro frame assembly.
Further, in step S1.1, after finish turning the end surfaces of the two ends of the long-diameter cylindrical section of the pontoon to be processed, the parallelism of the end surfaces of the two ends of the long-diameter cylindrical section is made to be less than or equal to 0.001mm.
Further, in step S1.2, when the pressing end face clamp is used, the inner diameter of the long diameter cylinder section is measured by using the small force measuring tool, so that the thin wall part is prevented from being deformed due to overlarge clamping force of the pressing end face clamp.
Further, in step S1.2, the first positioning inner hole phi B of the pontoon to be processed is finish turned 1 And a second positioning inner hole phi B 2 After that, the first positioning inner hole phi B 1 The cylindricity of the steel is less than or equal to 0.004mm; second positioning inner hole phi B 2 The cylindricity of (C) is less than or equal to 0.002mm.
Further, in step S1.2, the first positioning hole phi B 1 The machining tolerance of (3) is 0 to +0.016;
the second positioning inner hole phi B 2 The machining tolerance of (3) is 0 to +0.013.
Further, in step S2, the first positioning outer circle Φc 1 The machining tolerance of (2) is-0.002-0;
the second positioning excircle phi C 2 The machining tolerance of the steel is-0.002-0.
The invention has the beneficial effects that:
1. according to the machining tool for the electromechanical gyro frame assembly, provided by the invention, the dimensional accuracy and the shape and position accuracy of pontoon machining are improved by adopting the two double-positioning tensioning clamps, the deformation is reduced, and the dimensional consistency after machining is improved.
2. The clamping end face clamp is adopted, so that radial displacement and extrusion of the pontoon in the clamp in the locking process are prevented, clamping deformation of the thin-wall pontoon part is reduced, and the dimensional accuracy and shape and position accuracy of the thin-wall pontoon part are further improved.
3. The original machining method of the electromechanical gyro frame assembly is divided into float frame machining, pontoon machining and combined machining of the frame assembly, and by the machining tool provided by the invention, only the float frame and the pontoon are required to be machined respectively, the frame assembly is not required to be machined, and the production efficiency of the frame assembly is improved.
4. The processing method provided by the invention omits the grinding process, the metering process and the checking process of the pontoon, does not need to meter the actual size and the form and position tolerance of all the pontoon parts, only needs to meter the first product in the same batch, and the subsequent processing pontoon parts are all of online measurement and control sizes, thereby saving a large amount of processing and checking time and greatly improving the processing efficiency; the processing method is suitable for mass production of electromechanical gyroscopes, and the pontoon has good consistency and small deformation, and is not subjected to combined processing.
5. The interchangeability of parts of the electromechanical gyro frame assembly formed by assembling the buoy and the buoy frame processed by the processing method is improved, the buoy frame and the buoy are not required to be matched one by one for storage, and the assembly efficiency is greatly improved.
Drawings
FIG. 1 is a schematic diagram of a pontoon structure;
FIG. 2 is a schematic diagram of a float frame structure;
FIG. 3 is a schematic diagram of an assembled configuration of a buoy and a buoy frame;
FIG. 4 is a schematic diagram of a dual-positioning tensioning fixture in an embodiment of the processing tool for an electromechanical gyroscope frame assembly according to the present invention;
FIG. 5 is a schematic diagram of a press end face fixture in an exemplary embodiment of a processing tool for an electromechanical gyroscope frame assembly according to the present invention
FIG. 6 is a schematic diagram of a buoy to be processed in an embodiment of a method for processing an electromechanical gyroscope frame assembly according to the present invention;
FIG. 7 is a schematic view of a float frame to be processed in an exemplary embodiment of a method of processing an electromechanical gyro frame assembly according to the present invention.
The reference numerals are as follows:
01-pontoon, 02-pontoon frame;
the device comprises a 1-double positioning tensioning clamp, a 11-first clamp seat, a 12-positioning shaft, a 13-tensioning conical surface, a 14-first positioning annular surface, a 15-second positioning annular surface, a 16-central hole, a 17-cutting groove, a 2-compression end face clamp, a 21-locking sleeve, a 22-locking nut, a 23-positioning sleeve, a 24-positioning flange, a 25-second clamp seat, a 26-positioning end face, a 27-positioning step surface, a 28-inner convex ring, a 29-outer convex ring, a 3-to-be-processed buoy and a 4-to-be-processed buoy frame.
Detailed Description
Referring to fig. 4 and 5, the present embodiment provides an electromechanical gyro frame assembly machining tool, which includes a dual positioning tensioning clamp 1 and a pressing end face clamp 2;
the double-positioning tensioning clamp 1 comprises a first clamp seat 11 and a positioning shaft 12 which are coaxially arranged from left to right; the positioning shaft 12 is provided with a central hole 16 which is opened on the right end surface and three cutting grooves 17 which divide the positioning shaft 12 into three sector blocks; the opening of the central hole 16 is provided with a tensioning conical surface 13; the center hole 16 is internally provided with internal threads for realizing the positioning and clamping of the double positioning tensioning clamp 1 by matching with the matched tensioning screws and expanding the three sector blocks.
The outer end surface of the positioning shaft 12 is provided with a first positioning annular surface 14, a transition surface and a second positioning annular surface 15 in sequence from left to right, the first positioning annular surface 14 is matched with the inner side surface of the long-diameter cylindrical section of the pontoon 3 to be processed, and the second positioning annular surface 15 is matched with the inner side surface of the short-diameter cylindrical section of the pontoon 3 to be processed. The double-positioning tensioning clamp 1 has the advantages of high positioning precision, high coaxiality of machined parts and uniform tensioning force, so that deformation control in the buoy clamping and machining process is good, and dimensional precision and shape and position precision are higher than those of the conventional tensioning clamp.
The compression end face clamp 2 comprises a compression seat, a locking sleeve 21 and a locking nut 22; the compressing seat comprises a locating sleeve 23, a locating flange 24 and a second clamp seat 25 which are coaxially arranged from left to right; the locking sleeve 21 is sleeved on the positioning sleeve 23, an inner convex ring 28 is arranged at the left end of the locking sleeve 21, and an outer convex ring 29 is arranged at the right end of the locking sleeve 21; a positioning step surface 27 matched with the outer step surface of the pontoon 3 to be processed is arranged in the positioning sleeve 23, and the left end surface of the positioning sleeve 23 is a positioning end surface 26 flush with the left end surface of the pontoon 3 to be processed; the outer side surface of the positioning flange 24 is provided with external threads, and the locking nut 22 is matched with the external threads and used for compressing the right end surface of the outer convex ring 29 and the left end surface of the positioning flange 24, and the right end surface of the inner convex ring 28 and the left end surface of the positioning sleeve 23.
The clamp 2 with the pressing end face is used as a clamp guide element by introducing the locking sleeve 21, the pressing end face of the original locking nut is changed into the end face of the locking sleeve 21 to be pressed, the design advantages of the clamp are that the positioning precision is higher, the pressing force is uniform, and therefore deformation control in the buoy clamping and processing process is good, and the shape and position precision and the dimensional precision are higher than those of a conventional pressing clamp.
The embodiment also provides a using method of the machining tool for the electromechanical gyro frame assembly, which comprises the following steps:
s1, processing a pontoon:
s1.1, fixing a pontoon 3 to be processed by using a first double-positioning tensioning clamp 1, wherein a first positioning annular surface 14 of the double-positioning tensioning clamp 1 is matched with the inner side surface of a long-diameter cylindrical section of the pontoon 3 to be processed, and a second positioning annular surface 15 is matched with the inner side surface of a short-diameter cylindrical section of the pontoon 3 to be processed; finish turning the end surfaces of the two ends of the long-diameter cylinder section of the pontoon 3 to be processed, and ensuring that the end surfaces of the two ends of the long-diameter cylinder section are parallel; in the embodiment, the first positioning ring surface 14 of the double positioning tensioning clamp 1 is used for positioning the inner hole at the first position
Figure BDA0003573164170000081
(at this time, the first positioning inner hole phiB) 1 Not yet machined) and a second locating hole
Figure BDA0003573164170000082
(at this time, the second positioning inner hole phiB) 2 Not yet machined) double positioning, machining +.>
Figure BDA0003573164170000091
End faces at both ends of (a) are ensured->
Figure BDA0003573164170000092
The parallelism of the end faces of both ends of (2) is within 0.001mm.
S1.2, using a pressing end face clamp 2, and finely turning a first positioning inner hole phi B of the buoy 3 to be processed by matching the end faces of the two ends of the long-diameter cylinder section of the buoy 3 to be processed finely turned in the step S1.1 with the positioning end face 26 and the positioning step face 27 of the positioning sleeve 23 1 And a second positioning inner hole phi B 2 Ensure the first positioning inner hole phi B 1 And a second positioning inner hole phi B 2 The dimensional consistency of (2) is within 0.002 mm; in this embodiment, see FIG. 6, after finish turning
Figure BDA0003573164170000093
End face positioning clamping and pressing end face clamp 2 at two ends of the first positioning inner hole is turned>
Figure BDA0003573164170000094
And a second positioning inner hole
Figure BDA0003573164170000095
Turning to the inner diameter of the first positioning inner hole>
Figure BDA0003573164170000096
And a second positioning inner hole
Figure BDA0003573164170000097
For the first positioning inner hole after finishing the processing +.>
Figure BDA0003573164170000098
And a second positioning inner hole
Figure BDA0003573164170000099
The actual size is measured and the uniformity of the sizes of the two positioning holes is ensured to be within 0.002mm, and the first positioning is carried outHoles->
Figure BDA00035731641700000910
The cylindricity of (C) is controlled within 0.004mm, and the second positioning inner hole
Figure BDA00035731641700000911
The cylindricity of the float bowl is controlled within 0.002mm, so that the interchangeability of the float bowl assembly float frame is ensured; meanwhile, a small force measuring tool is adopted to measure the inner diameter of the long-diameter cylinder section, so that the thin-wall pontoon is prevented from deforming; reference is made to chinese patent publication No. CN 110608652A, which discloses a precise measuring device and method for hole diameter of inner hole, and the small measuring tool used in this embodiment is the precise measuring device for hole diameter of inner hole disclosed in the patent.
S1.3, using a second double-positioning tensioning clamp 1, wherein a first positioning annular surface 14 of the double-positioning tensioning clamp 1 is matched with the inner side surface of the long-diameter cylindrical section of the pontoon processed in the step S1.2, and a second positioning annular surface 15 is matched with the inner side surface of the short-diameter cylindrical section of the pontoon processed in the step S1.2; finely turning the first positioning inner hole in the step S1.2
Figure BDA00035731641700000912
And a second positioning inner hole->
Figure BDA00035731641700000913
Positioning and fixing a second double-positioning tensioning clamp 1, finely turning the outer circle surface of the short-diameter cylinder section and the right end surface of the short-diameter cylinder section, and carrying out the outer circle of the short-diameter cylinder section>
Figure BDA00035731641700000914
Processed into->
Figure BDA00035731641700000915
Enabling the excircle phi B of the short-diameter cylinder section of the pontoon to be 3 With the first positioning inner hole phi B 1 And a second positioning inner hole phi B 2 The coaxiality of the short diameter cylinder section meets the requirement, and the axial length L of the short diameter cylinder section A2 =6.4±0.03, and the perpendicularity of the right end face of the long diameter cylindrical section and the outer circumferential face of the short diameter cylindrical sectionMeets the design requirements.
S2, processing a float frame:
determining a first positioning outer circle of the float frame according to the metering size of the float after S1.3 processing, see FIG. 7
Figure BDA0003573164170000101
And a second positioning outer circle->
Figure BDA0003573164170000102
Then the first positioning excircle and the second positioning excircle of the float frame are processed by taking the processing dimension as a standard to finish the processing of the float frame, and the fit clearance between the float and the float frame is required to be 0.002 mm-0.004 mm;
s3, assembling the buoy processed in the step S1 and the buoy frame processed in the step S2 into an electromechanical gyro frame assembly, namely, sleeving the left end of the long-diameter cylinder section on the buoy frame along the right end of the buoy frame, and positioning an inner hole in a first mode
Figure BDA0003573164170000103
Is clamped on the outer circle of the first positioning part>
Figure BDA0003573164170000104
Right end of (2), second positioning inner hole
Figure BDA0003573164170000105
Is clamped on the second positioning excircle>
Figure BDA0003573164170000106
Is the right end of (c).
The technical scheme innovates the precision machining tool and the precision machining method of the electromechanical gyro frame assembly, improves the double-positioning tensioning clamp 1 and the pressing end face clamp 2, optimizes the machining process flow of the electromechanical gyro frame assembly, improves the dimensional accuracy and the shape and position accuracy of a pontoon, well controls the deformation of the electromechanical gyro frame assembly, improves the machining efficiency and interchangeability of the electromechanical gyro frame assembly, and can be popularized to the machining of all electromechanical gyro frame assemblies and the machining of all thin-wall parts.

Claims (7)

1. A method of processing an electromechanical gyroscopic frame assembly, comprising the steps of:
s1, processing a pontoon:
s1.1, fixing a buoy (3) to be processed by using a first double-positioning tensioning clamp (1), matching a first positioning ring surface (14) of the double-positioning tensioning clamp (1) with the inner side surface of a long-diameter cylinder section of the buoy (3) to be processed, and matching a second positioning ring surface (15) with the inner side surface of a short-diameter cylinder section of the buoy (3) to be processed; finish turning the end surfaces of the two ends of the long-diameter cylinder section of the pontoon (3) to be processed, and ensuring that the end surfaces of the two ends of the long-diameter cylinder section are parallel;
the double-positioning tensioning clamp (1) comprises a first clamp seat (11) and a positioning shaft (12) which are coaxially arranged from left to right; the positioning shaft (12) is provided with a central hole (16) which is opened on the right end surface, and three cutting grooves (17) which divide the positioning shaft (12) into three sector blocks; a tensioning conical surface (13) is arranged at the opening of the central hole (16); the outer end surface of the positioning shaft (12) is sequentially provided with a first positioning ring surface (14), a transition surface and a second positioning ring surface (15) from left to right, the first positioning ring surface (14) is matched with the inner side surface of the long-diameter cylinder section of the pontoon (3) to be processed, and the second positioning ring surface (15) is matched with the inner side surface of the short-diameter cylinder section of the pontoon (3) to be processed;
s1.2, using a pressing end face clamp (2), and matching the end faces at two ends of the long-diameter cylinder section of the pontoon (3) to be processed after finish turning in the step S1.1 with the positioning end face (26) and the positioning step face (27) of the positioning sleeve (23), wherein the first positioning inner hole phi B of the pontoon (3) to be processed is finish turned 1 And a second positioning inner hole phi B 2 Ensure the first positioning inner hole phi B 1 And a second positioning inner hole phi B 2 The dimensional consistency of (2) is within 0.002 mm;
the pressing end face clamp (2) comprises a pressing seat, a locking sleeve (21) and a locking nut (22); the compressing seat comprises a locating sleeve (23), a locating flange (24) and a second clamp seat (25) which are coaxially arranged from left to right; the locking sleeve (21) is sleeved on the positioning sleeve (23), an inner convex ring (28) is arranged at the left end of the locking sleeve (21), and an outer convex ring (29) is arranged at the right end of the locking sleeve; a positioning step surface (27) matched with the outer step surface of the pontoon (3) to be processed is arranged in the positioning sleeve (23), and the left end surface of the positioning sleeve (23) is a positioning end surface (26) flush with the left end surface of the pontoon (3) to be processed; the outer side surface of the positioning flange (24) is provided with external threads, and the locking nut (22) is matched with the external threads and used for compressing the right end surface of the outer convex ring (29) and the left end surface of the positioning flange (24) as well as the right end surface of the inner convex ring (28) and the left end surface of the positioning sleeve (23);
s1.3, using a second double-positioning tensioning clamp (1), wherein a first positioning annular surface (14) of the double-positioning tensioning clamp (1) is matched with the inner side surface of the long-diameter cylinder section of the pontoon processed in the step S1.2, and a second positioning annular surface (15) is matched with the inner side surface of the short-diameter cylinder section of the pontoon processed in the step S1.2; finely turning the first positioning inner hole phi B in the step S1.2 1 And a second positioning inner hole phi B 2 The double-positioning tensioning clamp (1) is positioned and fixed, and the outer circle surface of the short-diameter cylinder section and the right end surface of the short-diameter cylinder section are finely turned, so that the outer circle phi B of the short-diameter cylinder section of the pontoon is formed 3 With the first positioning inner hole phi B 1 And a second positioning inner hole phi B 2 The coaxiality of the short-diameter cylinder section and the outer circle axial length L of the short-diameter cylinder section A2 The perpendicularity between the right end surface of the long-diameter cylinder section and the outer circular surface of the short-diameter cylinder section meets the design requirement;
s2, processing a float frame:
determining a first positioning excircle phi C of the float frame according to the metering size of the float after S1.3 processing 1 And a second positioning outer circle phi C 2 Then the first positioning excircle and the second positioning excircle of the float frame are processed by taking the processing dimension as a standard to finish the processing of the float frame, and the fit clearance between the float and the float frame is required to be 0.002 mm-0.004 mm;
s3, assembling the pontoon processed in the step S1 and the floater frame processed in the step S2 into an electromechanical gyro frame assembly.
2. The method of processing an electromechanical gyroscopic frame assembly according to claim 1, in which:
in the step S1.1, after finish turning the end surfaces of the two ends of the long-diameter cylinder section of the pontoon (3) to be processed, the parallelism of the end surfaces of the two ends of the long-diameter cylinder section is less than or equal to 0.001mm.
3. The method of processing an electromechanical gyroscopic frame assembly according to claim 2, in which:
in the step S1.2, when the pressing end face clamp (2) is used, the small force measuring tool is used for measuring the inner diameter of the long-diameter cylinder section, so that the thin-wall part is prevented from being deformed due to overlarge clamping force of the pressing end face clamp (2).
4. A method of machining an electromechanical gyroscopic frame assembly according to any one of claims 1 to 3 in which:
in the step S1.2, a first positioning inner hole phi B of the pontoon (3) to be processed is finely turned 1 And a second positioning inner hole phi B 2 After that, the first positioning inner hole phi B 1 The cylindricity of the steel is less than or equal to 0.004mm; second positioning inner hole phi B 2 The cylindricity of (C) is less than or equal to 0.002mm.
5. The method of processing an electromechanical gyroscopic frame assembly of claim 4, in which:
in step S1.2, the first positioning inner hole phi B 1 The machining tolerance of (3) is 0 to +0.016;
the second positioning inner hole phi B 2 The machining tolerance of (3) is 0 to +0.013.
6. The method of processing an electromechanical gyroscopic frame assembly of claim 5, in which:
in step S2, the first positioning outer circle phi C 1 The machining tolerance of (2) is-0.002-0;
the second positioning excircle phi C 2 The machining tolerance of the steel is-0.002-0.
7. The method of processing an electromechanical gyroscopic frame assembly of claim 6, in which:
in the step S1.1, an internal thread is arranged in the central hole (16) and is used for matching with an adaptive tensioning screw to expand three sector blocks to realize the positioning and clamping of the double-positioning tensioning clamp (1).
CN202210331289.XA 2022-03-30 2022-03-30 Machining tool and machining method for electromechanical gyro frame assembly Active CN114833599B (en)

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