CN114833599A - 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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Publication number
CN114833599A
CN114833599A CN202210331289.XA CN202210331289A CN114833599A CN 114833599 A CN114833599 A CN 114833599A CN 202210331289 A CN202210331289 A CN 202210331289A CN 114833599 A CN114833599 A CN 114833599A
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positioning
buoy
clamp
face
inner hole
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CN114833599B (en
Inventor
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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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, 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
    • B23Q3/00Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, 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
    • B23Q2703/00Work clamping
    • B23Q2703/02Work clamping means
    • B23Q2703/10Devices for clamping workpieces of a particular form or made from a particular material

Abstract

The invention relates to a machining tool and a machining method for an electromechanical gyro frame assembly, and aims to solve the technical problems that a thin-wall part buoy is easy to deform and low in cylindricity in the machining process, so that the thin-wall part buoy needs to be matched with a buoy frame one by one when combined, the machining efficiency is low, and the thin-wall part buoy is not suitable for batch 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 face of the positioning shaft is matched with the inner side of the buoy to be processed; the pressing end face clamp comprises a pressing seat, a locking sleeve and a locking nut; the compressing seat comprises a positioning sleeve, a positioning flange and a second clamp seat which are coaxially arranged. The method comprises the following steps that 1, a first double-positioning tensioning clamp is used, and end faces of two ends of a long-diameter cylindrical section of a buoy are turned; 2. turning a first positioning inner hole and a second positioning inner hole of the buoy to be machined by using a compression end face 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 floater frame; 5. and (6) 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, electromechanical gyros have dominated the gyroscopic product market, and therefore, improvement in the production efficiency of electromechanical gyros, particularly improvement in the production efficiency of frame assemblies, has become a focus of research by those skilled in the art.
The frame assembly of electromechanical gyro is a key part of electromechanical gyro, and is equipped with motor, and is characterized by that it has a motor, and is pre-evacuated and filled with high-purity helium gas or hydrogen gas with a certain pressure, and its exterior is filled with suspension liquid, and its two ends are equipped with float balancing mechanisms, and its middle is a pivot (i.e. precession shaft). The level of precision of the electromechanical gyro is directly determined by the level of design and manufacturing process of the frame assembly. In addition, the frame assembly has extremely high requirement on air tightness, wherein the buoy and the floater frame form small clearance fit through two high-precision outer circles and two inner holes, the fit clearance is only 0.006 mm-0.008 mm, two sealing grooves with the width of 0.7mm and the depth of 0.2mm are designed on the two outer circles of the floater frame, and industrial structural sealant is coated to form a sealing body, so that the frame assembly with high precision, coaxiality and cylindricity is required to be obtained by assembling the buoy and the floater frame through the two high-precision outer circles and the two inner holes.
The frame assembly is made of aluminum rods 2A12-T4, the buoy is a typical thin-wall part, the wall thickness of 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 to control the deformation of the part, control the size precision of the part and control the shape and position precision, and the precision machining technology and 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 view of a buoy structure, fig. 2 is a schematic view of a buoy frame structure, and fig. 3 is a schematic view of an assembly structure of the buoy and the buoy frame; first positioning outer circle phi C of floater frame 02 1 A first positioning inner hole phi B of the buoy 01 1 In cooperation, the second positioning outer circle phi C of the float frame 02 2 Second positioning inner hole phi B of buoy 01 2 The outer side of the buoy 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 Axial length of buoy 01 is L A1 (ii) a As the buoy 01 is a thin-wall part, the wall thickness is only 0.4mm, the buoy is easy to deform after being processed, the size and the cylindricity are not easy to control, and the cylindricity of the inner holes at two positions is controlled within 0.03mm in principle, namely a qualified product. 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 Later, the size difference of the inner holes of each buoy 01 is large, the buoy frame 02 is not suitable for being processed into a uniform size, so the actual sizes and cylindricities of the first positioning inner holes and the second positioning inner holes of all the buoys 01 need to be measured, and then the sizes are divided into groups to vehicle the first positioning excircle phi C of the buoy frame 02 1 And a second positioning outer circle phi C 2 So as to ensure that the float frame 02 and the float bowl 01 are matched in a way of smooth hand feeling.
The original processing method of the electromechanical gyro frame assembly comprises buoy processing, floater frame processing and combined processing for forming the frame assembly after combination. The specific process is as follows, 1, float bowl processing: manually grinding two end faces of the float bowl to enable the axial size of the float bowl to be L A1 The planeness of two end faces is 0.002mm, and the parallelism is 0.003 mm; lathing a first positioning inner hole phi B by taking two end faces as references 1 And a second positioning inner hole phi B 2 Because the buoy is a thin-wall part, the buoy is easy to deform after processing, the size and the cylindricity are not easy to control, and the actual size and the cylindricity are combinedThe dimensional requirements cannot be fully met. 2. Processing a floater frame: after the processes of turning, milling and heat treatment, the first positioning excircle phi C is finally positioned 1 And a second positioning outer circle phi C 2 And machining to a corresponding size, and reserving a margin of 0.2mm for the frame assembly turning process. 3. Processing the frame assembly: according to the actually measured first positioning inner hole phi B1 and second positioning inner hole phi B of the buoy 2 Is matched with a first positioning excircle phi C of the float frame one by one 1 And a second positioning outer circle phi C 2 The matching of the float frame and the float bowl is ensured to be a sliding fit; 4. turning outer circles phi B of short-diameter cylinder sections of the buoy by using two center holes on the left and right of a top center for the assembled frame assembly 3 And the right end surface of the short-diameter cylinder section of the float bowl, so that the axial length L of the short-diameter cylinder section A2 Meets the requirement and ensures the outer circle phi B of the short-diameter cylinder section 3 The coaxiality between the positioning inner hole and the first positioning inner hole and the coaxiality between the positioning inner hole and the second positioning inner hole and the verticality between the right end surface of the long-diameter cylinder section and the outer circular surface of the short-diameter cylinder section meet the requirements.
The original machining method for the electromechanical gyro frame assembly is long in machining process, time-consuming, labor-consuming, low in machining efficiency, free of interchangeability and not suitable for mass production, and vehicles need to be matched one by one and put in storage in pairs.
Disclosure of Invention
The invention aims to solve the technical problems that thin-wall part buoys in an electromechanical gyro frame assembly are easy to deform and low in cylindricity in the machining process, so that the thin-wall part buoys need to be matched with a buoy frame one by one when being combined, the machining efficiency is low, and the thin-wall part buoys are not suitable for batch production.
The technical scheme of the invention is as follows:
the utility model provides an electromechanical top frame subassembly processing frock, its special character lies in:
the device comprises two double-positioning tensioning clamps with the same structure and a pressing end surface clamp;
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 with an opening on the right end surface and three cutting grooves for dividing the positioning shaft into three fan-shaped blocks;
a tensioning conical surface is arranged at the opening of the central hole;
the outer end face of the positioning shaft is sequentially provided with a first positioning ring face, a transition face and a second positioning ring face from left to right, the first positioning ring face is matched with the inner side face of the long-diameter cylinder section of the buoy to be processed, and the second positioning ring face is matched with the inner side face of the short-diameter cylinder section of the buoy to be processed;
the pressing end face clamp comprises a pressing seat, a locking sleeve and a locking nut;
the pressing seat comprises a positioning sleeve, a positioning 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 buoy to be processed is arranged in the positioning sleeve, and the left end surface of the positioning sleeve is a positioning end surface which is flush with the left end surface of the buoy to be processed;
the outer side face of the positioning flange is provided with external threads, and the locking nut is matched with the external threads and used for compressing the right end face of the outer convex ring, the left end face of the positioning flange, the right end face of the inner convex ring and the left end face of the positioning sleeve.
Furthermore, an internal thread is arranged in the central hole and is used for expanding the three fan-shaped blocks in a matched manner by matching with the matched tension screw to realize the positioning and clamping of the double-positioning tension clamp.
The invention also provides a processing method of the electromechanical gyro frame assembly, which is characterized in that the processing tool based on the electromechanical gyro frame assembly comprises the following steps:
s1, processing a buoy:
s1.1, fixing the 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 cylinder 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 cylinder section of the buoy to be processed; finely turning the end surfaces of two ends of the long-diameter cylindrical section of the buoy to be machined to ensure that the end surfaces of the two ends of the long-diameter cylindrical section are parallel;
s1.2, using a compaction end face clamp to finish turning a first positioning inner hole phi B of the buoy to be processed according to the fact that the end faces of the two ends of the long-diameter cylinder section of the buoy to be processed after finish turning in the step S1.1 are matched with the positioning end face and the positioning step face of the positioning sleeve 1 And a second positioning inner hole phi B 2 To ensure the first positioning inner hole phi B 1 And a second positioning inner hole phi B 2 The size consistency of the particles 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 cylinder section of the buoy processed in the step S1.2, and a second positioning ring surface is matched with the inner side surface of the short-diameter cylinder section of the buoy processed in the step S1.2; the first positioning inner hole phi B after the finish turning in the step S1.2 1 And a second positioning inner hole phi B 2 Positioning and fixing the double-positioning tensioning clamp, and finely turning the outer circle surface of the short-diameter cylinder section and the right end surface of the short-diameter cylinder section to ensure that the outer circle phi B of the short-diameter cylinder section of the buoy is 3 Is aligned with the first positioning inner hole phi B 1 And a second positioning inner hole phi B 2 The axial length L of the minor diameter cylindrical section A2 The perpendicularity between the right end surface of the long-diameter cylindrical section and the outer circular surface of the short-diameter cylindrical section meets the design requirement;
s2, processing a float frame:
determining a first positioning excircle phi C of the float frame according to the measuring size of the float after S1.3 processing 1 And a second positioning outer circle phi C 2 The machining size is taken as a standard to machine a first positioning excircle and a second positioning excircle of the float frame, so that the float frame is machined, and the matching clearance between the float bowl and the float frame is required to be 0.002-0.004 mm;
and S3, assembling the buoy processed in the step S1 and the floater frame processed in the step S2 into an electromechanical gyro frame assembly.
Further, in step S1.1, after the end faces at the two ends of the long-diameter cylinder section of the buoy are finish-turned, the parallelism of the end faces at the two ends of the long-diameter cylinder section is less than or equal to 0.001 mm.
Further, in step S1.2, when the pressing end face fixture is used, a small force measuring gauge is used to measure the inner diameter of the long-diameter cylindrical section, so as to prevent the thin-walled part from deforming due to an excessive clamping force of the pressing end face fixture.
Further, in step S1.2, finish turning a first positioning inner hole phi B of the buoy to be machined 1 And a second positioning inner hole phi B 2 Then, the first positioning inner hole phi B 1 The cylindricity of (2) is less than or equal to 0.004 mm; second positioning inner hole phi B 2 The cylindricity of (2) is less than or equal to 0.002 mm.
Further, in step S1.2, the first positioning inner hole Φ B 1 The processing tolerance of (2) is 0- + 0.016;
the second positioning inner hole phi B 2 The machining tolerance of (2) is 0 to + 0.013.
Further, in step S2, the first positioning outer circle Φ C 1 The machining tolerance of (a) is-0.002-0;
the second positioning excircle phi C 2 The machining tolerance of (a) is-0.002-0.
The invention has the beneficial effects that:
1. according to the electromechanical gyro frame assembly machining tool, the two double-positioning tensioning clamps are adopted, so that the size precision and the shape and position precision of the machined buoy are improved, the deformation is reduced, and the size consistency is improved after machining.
2. The invention adopts the compression end surface clamp to prevent the radial displacement and extrusion of the float bowl in the clamp in the locking process, reduces the clamping deformation of the thin-wall float bowl part and further improves the dimensional precision and the form and position precision of the thin-wall float bowl part.
3. The original processing method of the electromechanical gyro frame assembly comprises the steps of float frame processing, buoy processing and combined processing for forming the frame assembly after combination.
4. The processing method provided by the invention omits a grinding process, a metering process and a checking process of the buoy, does not need all buoy parts to meter the actual size and form and position tolerance, only needs to meter the first product in the same batch, and all subsequent processing buoy parts are in online measurement to control the size, 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 the electromechanical gyroscope, the buoy is good in consistency and small in deformation, and combination processing is not performed any more.
5. The electromechanical gyro frame assembly formed by assembling the floating barrel and the float frame processed by the processing method provided by the invention has the advantages that the interchangeability of parts is improved, the float frame and the floating barrel do not need to be matched and put in storage one by one, and the assembly efficiency is greatly improved.
Drawings
FIG. 1 is a schematic view of a buoy structure;
FIG. 2 is a schematic view of a float frame construction;
FIG. 3 is a schematic view of an assembly structure of the float bowl and the float frame;
FIG. 4 is a schematic structural view of a dual-positioning tensioning clamp in an embodiment of the electromechanical gyro frame assembly processing tool of the present invention;
FIG. 5 is a schematic view of a pressing end surface clamp structure in an embodiment of the electromechanical gyro frame assembly processing tool of the present invention
FIG. 6 is a schematic diagram of a buoy to be machined in an embodiment of the method for machining an electromechanical gyro frame assembly of the present invention;
fig. 7 is a schematic diagram of a floater frame to be processed in the embodiment of the processing method of the electromechanical gyro frame assembly.
The reference numbers are as follows:
01-buoy, 02-buoy frame;
1-double positioning tensioning clamp, 11-first clamp seat, 12-positioning shaft, 13-tensioning conical surface, 14-first positioning ring surface, 15-second positioning ring surface, 16-central hole, 17-cutting groove, 2-pressing end surface clamp, 21-locking sleeve, 22-locking nut, 23-positioning sleeve, 24-positioning flange, 25-second clamp seat, 26-positioning end surface, 27-positioning step surface, 28-inner convex ring, 29-outer convex ring, 3-buoy to be machined, and 4-buoy frame to be machined.
Detailed Description
Referring to fig. 4 and 5, the embodiment provides a processing tool for an electromechanical gyro frame assembly, where the tool includes a dual-positioning tensioning clamp 1 and a pressing end surface 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 opened on the right end face and three cutting grooves 17 for dividing the positioning shaft 12 into three fan-shaped blocks; a tensioning conical surface 13 is arranged at the opening of the central hole 16; the central hole 16 is internally provided with internal threads and is used for matching with a matched tensioning screw to expand three fan-shaped blocks to realize the positioning and clamping of the double-positioning tensioning clamp 1.
The outer end face of the positioning shaft 12 is sequentially provided with a first positioning ring face 14, a transition face and a second positioning ring face 15 from left to right, the first positioning ring face 14 is matched with the inner side face of the long-diameter cylindrical section of the buoy 3 to be processed, and the second positioning ring face 15 is matched with the inner side face of the short-diameter cylindrical section of the buoy 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 the deformation control in the process of clamping and machining the buoy is good, and the size precision and the form and position precision are higher than those of the conventional tensioning clamp.
The pressing end face clamp 2 comprises a pressing seat, a locking sleeve 21 and a locking nut 22; the pressing seat comprises a positioning sleeve 23, a positioning 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 buoy 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 buoy 3 to be processed; the outer side surface of the positioning flange 24 is provided with an external thread, and the locking nut 22 is matched with the external thread and used for pressing 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 end face pressing clamp 2 has the advantages that the locking sleeve 21 is introduced as a clamp guide element, the original locking nut pressing end face is changed into locking sleeve 21 end face pressing, and the clamp has the advantages of higher positioning precision and uniform pressing force, so that deformation control in the process of buoy clamping and machining is good, and the shape and position precision and the size precision are higher than those of a conventional pressing clamp.
The embodiment also provides a use method of the electromechanical gyro frame assembly machining tool, which comprises the following steps:
s1, processing a buoy:
s1.1, fixing a buoy 3 to be processed by using a first double-positioning tensioning clamp 1, wherein a first positioning ring surface 14 of the double-positioning tensioning clamp 1 is matched with the inner side surface of a long-diameter cylinder section of the buoy 3 to be processed, and a second positioning ring surface 15 is matched with the inner side surface of a short-diameter cylinder section of the buoy 3 to be processed; finely turning the end surfaces of two ends of the long-diameter cylindrical section of the buoy 3 to be processed to ensure that the end surfaces of the two ends of the long-diameter cylindrical section are parallel; in this embodiment, the first positioning ring surface 14 of the dual-positioning tensioning clamp 1 is a first positioning inner hole
Figure BDA0003573164170000081
(at this time, the first positioning inner hole phi B 1 Not yet machined) and a second locating bore
Figure BDA0003573164170000082
(at this time, the second positioning inner hole phi B 2 Not yet processed) double positioning, machining
Figure BDA0003573164170000091
End faces of both ends of
Figure BDA0003573164170000092
The parallelism of the end faces of both ends of (2) is within 0.001 mm.
S1.2, using the pressing end face clamp 2, matching the end faces of the two ends of the long-diameter cylinder section of the buoy 3 to be machined 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, and finish turning a first positioning inner hole phi B of the buoy 3 to be machined 1 And a second positioning inner hole phi B 2 To ensure the first positioning inner hole phi B 1 And a second positioning inner hole phi B 2 The size consistency of the particles is within 0.002 mm; in this embodiment, referring to fig. 6, the finish-turned product is
Figure BDA0003573164170000093
The end surfaces at the two ends are clamped and compressed tightly by the end surface clamp 2, and a first positioning inner hole is turned
Figure BDA0003573164170000094
And a second positioning inner hole
Figure BDA0003573164170000095
Turning to the inner diameter of a first positioning inner hole
Figure BDA0003573164170000096
And a second positioning inner hole
Figure BDA0003573164170000097
To the first positioning inner hole after finishing the processing
Figure BDA0003573164170000098
And a second positioning inner hole
Figure BDA0003573164170000099
The actual size is measured, the size consistency of the two positioning holes is ensured to be within 0.002mm, and the first positioning inner hole
Figure BDA00035731641700000910
The cylindricity of the second positioning inner hole is controlled within 0.004mm
Figure BDA00035731641700000911
The cylindricity of the float is controlled within 0.002mm, so that the interchangeability of the float bowl assembled with the 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 buoy is prevented from deforming; referring to the chinese patent with publication number CN 110608652 a, this patent discloses an inner bore diameter precision measurement device and measurement method, and the small force measuring tool adopted in this embodiment is the inner bore diameter precision measurement device disclosed in this patent.
S1.3, using a second double-positioning tensioning clamp 1, wherein a first positioning ring surface 14 of the double-positioning tensioning clamp 1 is matched with the inner side surface of the long-diameter cylindrical section of the buoy processed in the step S1.2, and a second positioning ring surface 15 is matched with the inner side surface of the short-diameter cylindrical section of the buoy processed in the step S1.2; the first positioning inner hole after the finish turning 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 enabling the outer circle of the short-diameter cylinder section to be in a round shape
Figure BDA00035731641700000914
Is processed into
Figure BDA00035731641700000915
Make the short-diameter cylinder section excircle of the float bowl phi B 3 Is aligned 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 meanwhile, the axial length L of the short-diameter cylinder section A2 6.4 +/-0.03, and the verticality 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 the first positioning outer circle of the float frame according to the measured size of the processed float after S1.3, see FIG. 7
Figure BDA0003573164170000101
And a second positioning outer circle
Figure BDA0003573164170000102
The machining size is taken as a standard to machine a first positioning excircle and a second positioning excircle of the float frame, so that the float frame is machined, and the matching clearance between the float bowl and the float frame is required to be 0.002-0.004 mm;
s3, assembling the buoy processed in the step S1 and the floater frame processed in the step S2 into an electromechanical gyroscope frame assembly, specifically, sleeving the left end of the long-diameter cylinder section on the floater frame along the right end of the floater frame, and arranging a first positioning inner hole in the floater frame
Figure BDA0003573164170000103
Is clamped on the first positioning excircle
Figure BDA0003573164170000104
Right end of the first positioning inner hole
Figure BDA0003573164170000105
Clamped on the second positioning excircle
Figure BDA0003573164170000106
To the right end of the housing.
The precision machining tool and method for the electromechanical gyro frame assembly are innovated, the double-positioning tensioning clamp 1 and the pressing end surface clamp 2 are improved, the machining process flow of the electromechanical gyro frame assembly is optimized, the size precision and the form and position precision of the buoy are improved, the deformation of the electromechanical gyro frame assembly is well controlled, and the machining efficiency and interchangeability of the electromechanical gyro frame assembly are improved.

Claims (8)

1. The utility model provides an electromechanical top frame subassembly processing frock which characterized in that:
comprises a double-positioning tensioning clamp (1) and a pressing end surface clamp (2) which have the same structure;
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 center hole (16) opened on the right end surface and three cutting grooves (17) for dividing the positioning shaft (12) into three fan-shaped blocks;
a tensioning conical surface (13) is arranged at the opening of the central hole (16);
the outer end face of the positioning shaft (12) is sequentially provided with a first positioning ring face (14), a transition face and a second positioning ring face (15) from left to right, the first positioning ring face (14) is matched with the inner side face of a long-diameter cylinder section of the buoy (3) to be processed, and the second positioning ring face (15) is matched with the inner side face of a short-diameter cylinder section of the buoy (3) to be processed;
the pressing end face clamp (2) comprises a pressing seat, a locking sleeve (21) and a locking nut (22);
the pressing seat comprises a positioning sleeve (23), a positioning 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 buoy (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) which is flush with the left end surface of the buoy (3) to be processed;
the outer side surface of the positioning flange (24) is provided with an external thread, and the locking nut (22) is matched with the external thread and used for pressing the right end surface of the outer convex ring (29), the left end surface of the positioning flange (24), the right end surface of the inner convex ring (28) and the left end surface of the positioning sleeve (23).
2. The electromechanical gyro frame assembly processing tooling of claim 1, characterized in that:
and an internal thread is arranged in the central hole (16) and is used for matching with a matched tensioning screw to expand the three fan-shaped blocks to realize the positioning and clamping of the double-positioning tensioning clamp (1).
3. A machining method of an electromechanical gyro frame assembly, which is based on the electromechanical gyro frame assembly machining tool of claim 1 or 2, and comprises the following steps:
s1, processing a buoy:
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; finely turning the end surfaces of two ends of the long-diameter cylinder section of the buoy (3) to be machined to ensure that the end surfaces of the two ends of the long-diameter cylinder section are parallel;
s1.2, using a pressing end face clamp (2) to match the end faces of the two ends of the long-diameter cylinder section of the buoy (3) to be machined 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), and finish turningA first positioning inner hole phi B of the buoy (3) to be processed 1 And a second positioning inner hole phi B 2 To ensure the first positioning inner hole phi B 1 And a second positioning inner hole phi B 2 The size consistency of the particles is within 0.002 mm;
s1.3, using a second double-positioning tensioning clamp (1), wherein a first positioning ring surface (14) of the double-positioning tensioning clamp (1) is matched with the inner side surface of the long-diameter cylinder section of the buoy processed in the step S1.2, and a second positioning ring surface (15) is matched with the inner side surface of the short-diameter cylinder section of the buoy processed in the step S1.2; the first positioning inner hole phi B after the finish turning in the step S1.2 1 And a second positioning inner hole phi B 2 Positioning and fixing the double-positioning tensioning clamp (1), and finely turning the outer circle surface of the short-diameter cylinder section and the right end surface of the short-diameter cylinder section to ensure that the outer circle phi B of the short-diameter cylinder section of the buoy is 3 Is aligned with the first positioning inner hole phi B 1 And a second positioning inner hole phi B 2 Coaxiality of the cylindrical sections and external axial length L of the short-diameter cylindrical sections A2 The perpendicularity between the right end surface of the long-diameter cylindrical section and the outer circular surface of the short-diameter cylindrical section meets the design requirement;
s2, processing a float frame:
determining a first positioning excircle phi C of the float frame according to the measuring size of the float after S1.3 processing 1 And a second positioning outer circle phi C 2 The machining size is taken as a standard to machine a first positioning excircle and a second positioning excircle of the float frame, so that the float frame is machined, and the matching clearance between the float bowl and the float frame is required to be 0.002-0.004 mm;
and S3, assembling the buoy processed in the step S1 and the buoy frame processed in the step S2 into an electromechanical gyro frame assembly.
4. A method of fabricating an electromechanical gyro frame assembly in accordance with claim 3, wherein:
in the step S1.1, after the end faces at the two ends of the long-diameter cylinder section of the buoy (3) to be processed are finely turned, the parallelism of the end faces at the two ends of the long-diameter cylinder section is smaller than or equal to 0.001 mm.
5. The method of fabricating an electromechanical gyro frame assembly of claim 4, wherein:
in the step S1.2, when the pressing end face clamp (2) is used, a 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 deforming due to the fact that the clamping force of the pressing end face clamp (2) is too large.
6. A method of fabricating an electromechanical gyro frame assembly according to any one of claims 3 to 5, wherein:
in step S1.2, a first positioning inner hole phi B of the buoy (3) to be processed is finely turned 1 And a second positioning inner hole phi B 2 Then, the first positioning inner hole phi B 1 The cylindricity of (2) is less than or equal to 0.004 mm; second positioning inner hole phi B 2 The cylindricity of (2) is less than or equal to 0.002 mm.
7. The method of fabricating an electromechanical gyro frame assembly of claim 6, wherein:
in step S1.2, the first positioning inner hole phi B 1 The processing tolerance of (2) is 0- + 0.016;
the second positioning inner hole phi B 2 The machining tolerance of (2) is 0 to + 0.013.
8. The method of fabricating an electromechanical gyro frame assembly of claim 7, wherein:
in step S2, the first positioning excircle φ C 1 The machining tolerance of (a) is-0.002-0;
the second positioning excircle phi C 2 The machining tolerance of (a) is-0.002-0.
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