CN108789858B - High-precision hard and brittle material coil framework turning and milling composite processing technology and tool - Google Patents

High-precision hard and brittle material coil framework turning and milling composite processing technology and tool Download PDF

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Publication number
CN108789858B
CN108789858B CN201810692978.7A CN201810692978A CN108789858B CN 108789858 B CN108789858 B CN 108789858B CN 201810692978 A CN201810692978 A CN 201810692978A CN 108789858 B CN108789858 B CN 108789858B
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gland
fastening screw
turning
coaxially
positioning seat
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CN108789858A (en
Inventor
李立杰
陈鹏
姚鑫
马明山
王宪云
代启超
高岭
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707th Research Institute of CSIC
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707th Research Institute of CSIC
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28DWORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28DWORKING STONE OR STONE-LIKE MATERIALS
    • B28D7/00Accessories specially adapted for use with machines or devices of the preceding groups
    • B28D7/04Accessories specially adapted for use with machines or devices of the preceding groups for supporting or holding work or conveying or discharging work

Abstract

The invention relates to a turning and milling combined machining process and a turning and milling combined machining tool for a coil framework made of a high-precision hard and brittle material. The invention optimizes the prior process flow, optimizes the original processing technology of sequentially finishing the inner hole and the outer circular ring groove of the part by twice clamping into the processing technology of sequentially finishing the inner hole and the outer circular ring groove of the part by the pressure reversing plate in one-time clamping, and designs the processing tool. By adopting the optimized process and the optimized processing tool, the processing difficulty of the part can be obviously reduced, the processing efficiency and the processing precision of the part can be obviously improved, and the manufacturing cost is reduced.

Description

High-precision hard and brittle material coil framework turning and milling composite processing technology and tool
Technical Field
The invention relates to the technical field of gyroscope coil framework precision machining, in particular to a high-precision hard and brittle material coil framework turning and milling composite machining process and tool.
Background
The high-precision high-resolution three-floating gyroscope core part coil framework is made of hard and brittle material processable ceramic, the whole part belongs to an annular thin-wall structure, slots are uniformly distributed in the circumferential direction of the excircle of the part, and gyroscope output coils are fixed by eight boss parts of the excircle of the framework. In order to ensure the positioning precision of the coil, the indexing precision of the bosses uniformly distributed on the outer circle of the part is higher, and the bottom surfaces of the outer circles around the bosses are required to be in smooth transition, so that the processing difficulty is further increased, and a schematic diagram of the three-dimensional structure of the part is shown in fig. 1.
At present, the peripheral wire grooves of the lug boss of the part are finished by a turning and milling combined method, and the process flow is as follows: 1. turning (finishing the processing of the inner hole and the circular groove in the circumferential direction of the excircle of the part); 2. and (positioning by the end face and the inner hole of the part to finish the processing of the axial wire groove and the fillet). The disadvantages of this solution are: because the inner holes are used as the reference during the processing of the peripheral slots of the excircle boss, the size precision of the inner hole of the part and the coaxiality of the inner hole and the excircle ring slot during the processing of the part by turning are higher than the requirement for ensuring the indexing precision of the boss relative to the axis of the inner hole after subsequent milling and the smooth transition of the ring slot in the circumferential direction during the processing of the part by turning, and the processing difficulty is increased. During milling, not only is the clearance between the inner hole of the part and the outer circle of the tool controlled, but also the center of the tool is ensured to coincide with the center of the rotary table, so that the processing difficulty is increased, and meanwhile, higher requirements are provided for processing the tool. In addition, because the excircle circumferencial direction wire casing and axial wire casing adopt twice dress card processing to accomplish, consequently machining efficiency is on the low side relatively.
Disclosure of Invention
The invention aims to make up for the defects of the prior art, and provides a turning and milling combined machining process and a turning and milling combined machining tool for the hard and brittle material gyroscope coil skeleton, which can greatly improve the machining efficiency and the machining precision of the hard and brittle material gyroscope coil skeleton, reduce the machining difficulty and obviously improve the machining quality of the bottom of an outer circular groove of a part.
The purpose of the invention is realized by the following technical means:
a high-precision hard and brittle material coil skeleton turning and milling composite processing technology is characterized in that: the method comprises the following steps:
the method comprises the steps that a positioning seat is connected with a main shaft of the turning and milling composite machine tool through a process handle, so that the positioning end surface of the positioning seat is perpendicular to the main shaft of the machine tool, and a positioning hole is coaxial with the main shaft of the machine tool;
placing the part into the positioning seat, ensuring that the bottom surface of the part is in good contact with the positioning end surface of the positioning seat, and tightly pressing the other end surface of the part by using the pressing end surface of the first pressing cover, and then finishing the processing of the inner hole of the part;
placing the second gland into the inner hole of the part, ensuring that the pressing end face of the second gland is well contacted with the positioning end face of the positioning seat, and connecting the second gland and the positioning seat together by adopting a first fastening screw; connecting the third gland with the first gland by using a second gland, and taking down the gland to finish the processing of the excircle and the annular groove of the coil skeleton; and after the machining is finished, sequentially taking down the fastening screw II, the gland III, the fastening screw I, the gland II and the coil framework to finish the machining of the part.
The utility model provides a hard brittle material coil skeleton turnning and milling combined machining frock of high accuracy which characterized in that: the gland device comprises a positioning seat, a gland I, a gland II, a gland III, a fastening screw I and a fastening screw II, wherein the gland I is coaxially installed on the outer side of the front end of the positioning seat, the gland II is coaxially installed on the inner side of the front end of the positioning seat through the fastening screw II, the gland III is coaxially connected with the fastening screw through the fastening screw II, and the gland III is located at the front end of the gland II.
The positioning seat comprises a process handle and a fixed end head, the rear end of the process handle is connected with a main shaft of the turning and milling composite machine tool, the front end of the process handle is coaxially connected with the fixed end head, an external thread used for being connected with a first gland is manufactured on the outer surface of the fixed end head, a threaded mounting hole used for being connected with a first fastening screw is coaxially manufactured inside the fixed end head, a positioning hole is coaxially manufactured on the front end face of the fixed end head, and the inner bottom face of the positioning hole is a positioning end face of the positioning seat.
And the gland is of a cylindrical annular structure, the rear end of the inside of the gland is provided with internal threads, the front end surface of the gland is coaxially provided with an inner extension edge, and the front end of the inside of the gland forms a compression end surface.
And the gland is a cylindrical barrel, two shaft holes with different diameters are coaxially manufactured in the barrel, and the two shaft holes are communicated to form a stepped platform structure in the barrel.
And an inner screw hole for connecting with the second fastening screw is coaxially formed on the axis of the first fastening screw.
And the third gland is in a circular plate shape, a circular groove is formed on the end surface of the third gland, and a penetrating hole is coaxially formed in the axis of the third gland.
And the first fastening screw and the second fastening screw are both socket head cap screws.
The invention has the advantages and positive effects that:
1. the processing method and the special tool based on the turning and milling combination solve various problems in the conventional processing of the gyroscope coil framework made of the high-precision hard and brittle material, and can further improve the smooth transition performance of the axial wire grooves and the circumferential wire grooves. Through literature retrieval, a machining process and a special tool for machining the excircle slot of the gyroscope coil framework made of the hard and brittle materials by a turning and milling composite machining method are not available in China.
2. The invention optimizes the original processing technology of respectively finishing the inner hole and the outer circular ring groove of the coil framework by twice clamping into the processing technology of finishing the inner hole and the outer circular ring groove of the part in sequence by the pressure reversing plate in one-time clamping, thereby obviously improving the processing efficiency and the processing precision of the part; because the inner hole and the outer circular ring groove of the part are finished in one-step clamping, the indexing precision of the circular grooves uniformly distributed on the outer circle relative to the inner hole is higher; in addition, the processing of the axial ring groove and the circumferential ring groove is finished in one-step clamping, the transition of the bottom of the ring groove is smoother, and the processing quality of parts is further improved.
3. The method has the advantages of ingenious design idea and innovativeness, solves the processing problem of the coil framework wire casing of the high-precision hard and brittle material by introducing a turning and milling composite processing technology, designing a special tool and other measures, improves the working efficiency, ensures the product quality and has popularization value.
4. The invention relates to a turning and milling combined machining process and a turning and milling combined machining tool for a high-precision hard and brittle material coil skeleton. The invention optimizes the original processing technology of sequentially finishing the inner hole and the outer circular ring groove of the part by twice clamping into the processing technology of sequentially finishing the inner hole and the outer circular ring groove of the part by the pressure reversing plate in one-time clamping, and designs a processing tool. By adopting the optimized process and the optimized processing tool, the processing difficulty of the part can be obviously reduced, the processing efficiency and the processing precision of the part can be obviously improved, and the manufacturing cost is reduced.
Drawings
FIG. 1 is a schematic diagram of a gyroscope torquer coil armature;
FIG. 2 is a diagram of a blank of a gyrotron bobbin;
FIG. 3 is a schematic diagram of a gyro coil bobbin positioning seat;
FIG. 4 is a schematic diagram of a first cover of a gyroscope bobbin;
FIG. 5 is a first schematic diagram of a second top coil bobbin pressing cover;
FIG. 6 is a second schematic diagram of a second top coil bobbin cover;
FIG. 7 is a schematic view of a first fastening screw of the gyro coil frame;
FIG. 8 is a schematic view of top bobbin cover III;
FIG. 9 is a schematic view of a second fastening screw of the gyro coil bobbin;
FIG. 10 is a schematic view of the inner hole processing of the gyro coil frame;
fig. 11 is a schematic view of the machining of the outer circular ring groove of the gyro coil bobbin.
Detailed Description
The following detailed description of the embodiments of the present invention is provided in conjunction with the accompanying drawings, which are intended to be illustrative, not limiting, and not limiting.
In order to facilitate understanding of the processing technology of the present invention, the tool used in the present invention is first introduced:
a high-precision turning and milling composite processing tool for a coil framework made of hard and brittle materials comprises a positioning seat 20, a first gland 7, a second gland 11, a third gland 16, a first fastening screw 14 and a second fastening screw 19, wherein the first gland is coaxially mounted on the outer side of the front end of the positioning seat, the second gland is coaxially mounted on the inner side of the front end of the positioning seat through the fastening screw, the third gland is coaxially connected with the fastening screw through the second fastening screw, and the gland is located at the front end of the second gland. The structure of each component is described in detail below:
the positioning seat comprises a process handle 4 and a fixing end 5, the rear end of the process handle is connected with a main shaft of a turning and milling composite machine tool, the front end of the process handle is coaxially connected with the fixing end, an external thread 6 used for being connected with a gland is manufactured on the outer surface of the fixing end, a threaded mounting hole 2 used for being connected with a fastening screw is coaxially manufactured in the fixing end, a positioning hole 3 is coaxially manufactured on the front end face of the fixing end, and the inner bottom face of the positioning hole is a positioning end face 1 of the positioning seat.
The gland is of a cylindrical annular structure, an internal thread 9 is manufactured at the rear end of the interior of the gland, and the internal thread is matched with the external thread of the positioning seat, so that the gland can be meshed and connected with the positioning seat. An inner extension edge is coaxially formed on the front end face of the first gland, so that a pressing end face 8 is formed at the front end inside the first gland. When the inner hole of the gyro coil framework is machined, the first pressing cover is installed on the positioning seat, and when the outer circular groove of the gyro coil framework is machined, the first pressing cover needs to be detached.
The second gland is a cylindrical barrel body, two shaft holes with different diameters are coaxially formed in the barrel body and communicated with each other, and therefore the stepped platform structure 13 is formed in the barrel body. The head of the first fastening screw is matched with the step platform, and the screw rod of the first fastening screw penetrates through the small-diameter shaft hole 12 and is connected with the threaded mounting hole of the positioning seat. The rear end face of the second gland is a pressing end face 10.
And fourthly, the first fastening screw is a socket head cap screw, and an inner threaded hole 15 for connecting the second fastening screw is coaxially formed in the axis of the socket head cap screw.
Fifthly, the third gland is in a circular plate shape, a circular groove 18 is formed in the end face of the third gland, a penetrating hole 17 is coaxially formed in the axis of the third gland, and a screw rod of the second fastening screw penetrates through the penetrating hole and is connected with an inner threaded hole of the first fastening screw.
Sixthly, the fastening screw II is a hexagon socket head cap screw.
A high-precision hard and brittle material coil framework turning and milling composite processing technology comprises the following steps:
the method comprises the steps that a positioning seat is connected with a main shaft of the turning and milling composite machine tool through a process handle, so that the positioning end surface of the positioning seat is perpendicular to the main shaft of the machine tool, and a positioning hole is coaxial with the main shaft of the machine tool;
placing the part 21 into the positioning seat to ensure that the bottom surface of the part is in good contact with the positioning end surface of the positioning seat, and pressing the other end surface of the part by using a pressing end surface 8 in the first pressing cover shown in FIG. 4, as shown in FIG. 10; then finishing the processing of the inner hole of the part;
placing the second gland into the inner hole of the part to ensure that the pressing end face 10 in the second gland shown in the figure 5 is well contacted with the positioning end face of the positioning seat, and connecting the second gland and the positioning seat together by adopting a first fastening screw; connecting the third gland with the first gland by using the second gland, and taking down the second gland to finish the processing of the excircle and the ring groove of the coil skeleton, as shown in fig. 11; and after the machining is finished, sequentially taking down the fastening screw II, the gland III, the fastening screw I, the gland II and the coil framework to finish the machining of the part.
The steps are repeated, and the next part can be machined.

Claims (5)

1. A high-precision hard and brittle material coil skeleton turning and milling composite processing technology is characterized in that: the method comprises the following steps:
the method comprises the steps that a positioning seat is connected with a main shaft of the turning and milling composite machine tool through a process handle, so that the positioning end surface of the positioning seat is perpendicular to the main shaft of the machine tool, and a positioning hole is coaxial with the main shaft of the machine tool;
placing the part into the positioning seat, ensuring that the bottom surface of the part is in good contact with the positioning end surface of the positioning seat, and tightly pressing the other end surface of the part by using the pressing end surface of the first pressing cover, and then finishing the processing of the inner hole of the part;
placing the second gland into the inner hole of the part, ensuring that the pressing end face of the second gland is well contacted with the positioning end face of the positioning seat, and connecting the second gland and the positioning seat together by adopting a first fastening screw; connecting the third gland with the first gland by using a second gland, and taking down the gland to finish the processing of the excircle and the annular groove of the coil skeleton; after the machining is finished, sequentially taking down the fastening screw II, the gland III, the fastening screw I, the gland II and the coil framework to finish the machining of the part;
the turning and milling composite processing tool for the high-precision hard and brittle material coil framework used in the turning and milling composite processing process for the high-precision hard and brittle material coil framework comprises a positioning seat, a first gland, a second gland, a third gland, a first fastening screw and a second fastening screw, wherein the first gland is coaxially installed on the outer side of the front end of the positioning seat, the second gland is coaxially installed on the inner side of the front end of the positioning seat through the fastening screw, the third gland is coaxially connected with the fastening screw through the second fastening screw, and the third gland is located at the front end of the second gland;
the positioning seat comprises a process handle and a fixed end head, the rear end of the process handle is connected with a main shaft of the turning and milling composite machine tool, the front end of the process handle is coaxially connected with the fixed end head, an external thread used for being connected with a gland bush is manufactured on the outer surface of the fixed end head, a threaded mounting hole used for being connected with a fastening screw is coaxially manufactured inside the fixed end head, a positioning hole is coaxially manufactured on the front end face of the fixed end head, and the inner bottom face of the positioning hole is a positioning end face of the positioning seat;
the first pressing cover is of a cylindrical annular structure, internal threads are formed at the rear end of the inside of the first pressing cover, an inner extending edge is coaxially formed on the front end face of the first pressing cover, and a pressing end face is formed at the front end of the inside of the first pressing cover.
2. The high-precision turning and milling composite machining process for the coil framework of the hard and brittle material as claimed in claim 1, characterized in that: the gland is a cylindrical barrel, two shaft holes with different diameters are coaxially manufactured in the barrel, and the two shaft holes are communicated to form a stepped platform structure in the barrel.
3. The high-precision turning and milling composite machining process for the coil framework of the hard and brittle material as claimed in claim 1, characterized in that: and an inner screw hole for connecting with the second fastening screw is coaxially formed in the axis of the first fastening screw.
4. The high-precision turning and milling composite machining process for the coil framework of the hard and brittle material as claimed in claim 1, characterized in that: the third gland is in a circular plate shape, a circular groove is formed on the end face of the third gland, and a penetrating hole is coaxially formed in the axis of the third gland.
5. The high-precision turning and milling composite machining process for the coil framework of the hard and brittle material as claimed in claim 1, characterized in that: the first fastening screw and the second fastening screw are both socket head cap screws.
CN201810692978.7A 2018-06-29 2018-06-29 High-precision hard and brittle material coil framework turning and milling composite processing technology and tool Active CN108789858B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111112954B (en) * 2020-01-03 2021-07-27 中国船舶重工集团公司第七0七研究所 Finish machining process method for inner cavity of floating drum of liquid floated gyroscope
CN111037324B (en) * 2020-01-03 2021-09-24 中国船舶重工集团公司第七0七研究所 Device and method for precisely milling and deburring metal harmonic oscillator

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CN104441256A (en) * 2014-10-16 2015-03-25 中国船舶重工集团公司第七0七研究所 Efficient precision machining method and special tools for accelerometer coil framework
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CN205764260U (en) * 2016-06-13 2016-12-07 鞍山海咯尔齿轮股份有限公司 A kind of pitch circle self-centering fixture
CN106346034A (en) * 2016-11-17 2017-01-25 陕西高华知本化工科技有限公司 Processing method for high-precision, thin-wall metallic torus components
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104400474A (en) * 2014-10-16 2015-03-11 中国船舶重工集团公司第七0七研究所 Rotation ultrasonic-based machining process and special tool for high-precision gyroscope movable coil skeleton
CN104441256A (en) * 2014-10-16 2015-03-25 中国船舶重工集团公司第七0七研究所 Efficient precision machining method and special tools for accelerometer coil framework
WO2016116869A1 (en) * 2015-01-20 2016-07-28 Dem Automazioni S.R.L. Pressing wheel
CN205764260U (en) * 2016-06-13 2016-12-07 鞍山海咯尔齿轮股份有限公司 A kind of pitch circle self-centering fixture
CN106346034A (en) * 2016-11-17 2017-01-25 陕西高华知本化工科技有限公司 Processing method for high-precision, thin-wall metallic torus components
CN107695683A (en) * 2017-09-27 2018-02-16 南京晨伟机械设备制造有限公司 A kind of turnning and milling frock

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