Machining device and machining method for inner molded surface of special-shaped ceramic antenna housing

Abstract

The invention provides a special-shaped ceramic radome inner molded surface machining device and method, the device comprises a machining mechanism and a positioning mechanism, the machining mechanism comprises a base, a rotary table base and a machined part, and a rotary table is rotatably connected to the rotary table base; the positioning mechanism comprises a shell provided with a shell inner cavity, a positioning piece with the outer contour matched with the shell inner cavity and a supporting piece with the middle provided with a positioning part matched with the outer portion of the shell, and a positioning station is preset in the middle of the positioning piece and used for machining positioning holes according to the appearance of the radome so as to position the radome of different specifications. The shell is provided with a first connecting piece used for being connected with the rotary table, and the supporting piece is provided with a second connecting piece used for being connected with the base. The positioning holes can be machined at the positioning stations according to the shapes of the radomes, so that the radomes of different specifications can be adaptively positioned, the machining device is high in adaptability, special tools do not need to be arranged for the radomes of different specifications, the radomes are easy and accurate to position, reference setting is facilitated, and the machining precision is high.

Description

Technical Field

[0001] The present invention relates to the technical field of processing special-shaped antenna covers, and in particular to a device and method for processing the inner surface of a special-shaped ceramic antenna cover. Background Art

[0002] The radome can protect the missile's antenna device. Its good wave transmission and heat insulation properties ensure that the received electromagnetic signal is stable and undistorted, and protect the missile from interference from the harsh external environment during flight. With the development of science and technology, higher requirements have been put forward for the flight distance, flight speed, and accuracy of missiles. Traditional rotating radomes can no longer meet the requirements. Special-shaped radomes have emerged and can be used for the antenna protection structure of high-speed missiles.

[0003] The special-shaped radome is a complex special-shaped structure with poor surface quality and low precision of the blank. It needs to be improved through subsequent machining to meet the requirements of the target product. The special-shaped radome has complex structures such as non-rotational high-order surfaces and sudden changes in curvature, which are common in waveriders or lifting bodies. The wall thickness is uneven and irregular. During the processing of existing processing equipment, the radome is difficult to position, the positioning is inaccurate, the reference setting is difficult, and flutter is easy to occur during processing. These problems greatly increase the processing difficulty, the processing cycle is long, the processing precision is low, the scrap rate is high, and the cost is high. In addition, the positioning structure of the existing processing equipment is complex and cannot be applied to the positioning of special-shaped radomes of different specifications, resulting in the need for special tooling for positioning radomes of each specification. Summary of the invention

[0004] The present invention provides a device and method for processing the inner surface of a special-shaped ceramic antenna cover, so as to solve the problem that the existing processing device cannot be applied to the positioning of special-shaped antenna covers of different specifications, resulting in the need to equip special tooling for positioning antenna covers of each specification, and during the processing, the antenna cover is difficult to position, the positioning is inaccurate, the reference setting is difficult, and vibration is easily generated during processing. The processing is difficult, the processing cycle is long, the processing accuracy is low, the scrap rate is high, and the cost is high.

[0005] On the one hand, the present invention provides a device for processing the inner surface of a special-shaped ceramic antenna cover, including a processing mechanism and a positioning mechanism, the processing mechanism including a base, a turntable seat arranged at one end of the base and a processing part arranged above the base, the turntable seat is rotatably connected with a turntable, and the turntable and the processing part are arranged opposite to each other; the positioning mechanism includes a shell, a positioning part and a support member, the shell is provided with a shell inner cavity, the outer contour of the positioning part is consistent with the shell inner cavity, the middle part of the support member is provided with a positioning part that cooperates with the outside of the shell, and the middle part of the positioning member is preset with a positioning station, which is used to process a positioning hole according to the shape of the antenna cover to position antenna covers of different specifications; one end of the shell is provided with a first connecting member for connecting to the turntable, and the bottom of the support member is provided with a second connecting member for connecting to the base.

[0006] Compared with the prior art, the present invention has the following beneficial effects: the shell of the processing device of the present invention is provided with a shell inner cavity, the outer contour of the positioning piece is consistent with the shell inner cavity, the positioning piece can be installed in the shell inner cavity, a positioning station is preset in the middle of the positioning piece, and a positioning hole can be processed at the positioning station according to the shape of the antenna cover to be processed, so as to adaptively position antenna covers of different specifications, thereby solving the problem that the existing processing device cannot be applied to the positioning of special-shaped antenna covers of different specifications and each specification of antenna covers needs to be equipped with special tooling when positioning; the positioning piece of the present invention positions the antenna cover to be processed, the shell positions the positioning piece, the turntable is connected to one end of the shell, a positioning part matched with the outside of the shell is provided in the middle of the support piece, the support piece further supports the shell on the base, and the positioning of the shell is realized by the turntable and the support piece, the antenna cover is easy to position, the positioning is accurate, and it is conducive to the setting of the reference, it is not easy to vibrate during processing, the processing difficulty is small, and the processing cycle is short. The present invention cooperates with the processing mechanism through the positioning mechanism, so that the turntable and the processing mechanism numerical control system are linked to improve the grinding processing accuracy of the inner surface, and the processing accuracy is high, the scrap rate is low, and the cost is low.

[0007] In some embodiments of the present invention, a first mounting seat is provided above the base, a second mounting seat is provided above the first mounting seat, and the second mounting seat can move left and right relative to the first mounting seat; a third mounting seat is provided above the second mounting seat, a workpiece mounting seat is provided above the third mounting seat, the workpiece is provided on the workpiece mounting seat, and the workpiece mounting seat can move forward and backward relative to the third mounting seat. The workpiece of the present invention has a Z-axis movement representing the left and right direction and an X-axis movement representing the front and back direction. With the rotation of the turntable, it can realize multi-directional linkage under the control of the CNC system of the processing mechanism, improve the grinding processing accuracy of the inner surface, and has high processing accuracy.

[0008] In some embodiments of the present invention, the workpiece includes a grinding shaft and a tool connected to the grinding shaft, the grinding shaft is L-shaped, and the tool and the grinding shaft are detachably connected. The special-shaped antenna cover has a small curvature arc transition, and a small-sized tool needs to be replaced for processing during processing, which will correspondingly cause the problem of reduced rigidity of the spindle and the tool. Therefore, the present invention develops an L-shaped grinding shaft, and the grinding shaft is transferred by 90°, which can reduce the vibration of the tool, avoid the problem of reduced rigidity of the spindle and the tool, extend the service life, and improve the processing accuracy. The tool and the grinding shaft are detachably connected to facilitate the replacement of the tool.

[0009] In some embodiments of the present invention, according to the shape of the radome, the positioning hole processed at the positioning station preset in the middle of the positioning member matches the contour of any position outside the radome; a plurality of machinable gaskets are provided on the inner wall of the positioning hole along its circumferential interval to position the radome through the machinable gaskets. The present invention processes the positioning hole at the positioning station of the positioning member and then arranges the machinable gasket, and the machinable gasket can be further trimmed to match the outer contour of the radome to perform initial positioning and alignment of the special-shaped radome, with high positioning accuracy, simple method, simple structure and strong versatility.

[0010] In some embodiments of the present invention, the number of the positioning members is two, and the positioning holes of the two positioning members match the corresponding outer contours of the antenna cover at the first position and the second position of the shell respectively; the first position is 20 to 25 cm from the shell end on the same side of the large end face of the antenna cover, and the second position is 145 to 150 cm from the shell end on the same side of the large end face of the antenna cover. The two positioning members of the present invention respectively position the large end side and the small end side of the antenna cover, and the positioning is more stable.

[0011] In some embodiments of the present invention, the positioning portion in the middle of the support member includes an opening and a support column connected to the opening wall, the support column is arranged on the opening wall at intervals around the opening, and the support column extends from the opening wall to the center of the opening; the length of the support column meets the following conditions: the support member is sleeved on the outside of the shell through the opening and the support column, the support column is in contact with the outside of the shell and does not hinder the rotation of the shell; a positioning seat is provided at the bottom of the support member, and the second connecting member is provided on the positioning seat. The support member of the present invention stably supports and positions the shell while satisfying the requirement that the shell rotates with the turntable.

[0012] In some embodiments of the present invention, the first connector at one end of the housing is connected to the turntable via a turntable connector; the turntable connector includes a first connection disk and a second connection disk arranged opposite to the first connection disk, the first connection disk is connected to the second connection disk; the first connector is connected to the first connection disk, and the turntable is connected to the second connection disk. The housing and the turntable of the present invention are connected by means of the turntable connector, and the connection stability is good.

[0013] In some embodiments of the present invention, an auxiliary positioning member is also included; the shell includes a first cylinder, a second cylinder connected to the first cylinder, and a third cylinder connected to one end of the second cylinder away from the first cylinder, the outer diameter of the first cylinder is smaller than the outer diameter of the second cylinder, which is smaller than the outer diameter of the third cylinder, the first connecting member is arranged at one end of the first cylinder away from the second cylinder, and the outer wall of the end of the third cylinder away from the second cylinder is provided with an external thread; the auxiliary positioning member is hollow inside and matches with the external thread end of the third cylinder, the inner wall of the auxiliary positioning member is provided with an internal thread, and the auxiliary positioning member and the third cylinder can be threadedly connected; a limiting ring is provided at the bottom of the auxiliary positioning member, and the limiting ring can limit the abutment ring abutting against the large end face of the antenna cover to assist in positioning the antenna cover; the first cylinder is provided with a plurality of notches arranged along its circumference; the support member is sleeved on the outside of the second cylinder. After the antenna cover is installed, the auxiliary positioning piece of the present invention can further abut the abutment ring on the large end surface of the antenna cover through a limiting ring to assist in positioning the antenna cover, thereby further increasing the positioning stability; the setting of the notch reduces the weight; the support piece is sleeved on the outside of the second cylindrical body, so that the support positions are respectively located at the large end and the small end, which is more stable.

[0014] On the other hand, the present invention also provides a method for processing the inner surface of a special-shaped ceramic antenna cover, which uses the special-shaped ceramic antenna cover inner surface processing device described in any of the above items to sequentially perform initial positioning and alignment of the antenna cover workpiece, rough processing of the inner surface, semi-finishing processing of the inner surface, finishing processing of the inner surface, removal of end face processing allowance and measurement of processing accuracy to complete the processing of the inner surface of the special-shaped ceramic antenna cover.

[0015] Compared with the prior art, the present invention has the following beneficial effects: the inner surface of the antenna cover is processed by the processing device of the present invention, the antenna cover is easy to position, the positioning is accurate, and it is conducive to the setting of the reference, it is not easy to vibrate during processing, the processing difficulty is small, and the processing cycle is short. The turntable is linked with the numerical control system of the processing mechanism to improve the grinding processing accuracy of the inner surface, and the processing accuracy is high, the scrap rate is low, and the cost is low.

[0016] In some embodiments of the present invention, the specific process of initial positioning and alignment of the antenna cover to be processed is as follows: connect the shell to the turntable, sleeve the support member on the outside of the second cylindrical body of the shell and connect the bottom of the support member to the base, mark the first position and the second position of the shell, and then bond the positioning member to the shell cavity corresponding to the first position and the second position, and process the positioning station preset in the middle of the positioning member with the outer contour of the antenna cover corresponding to the first position and the second position when the antenna cover is in a state of extending into the shell cavity, and process the positioning hole matching the corresponding outer contour of the antenna cover at the first position and the second position, and arrange a number of machinable gaskets on the inner wall of the positioning hole along the circumferential interval, and trim the machinable gaskets to match the corresponding outer contour of the antenna cover at the first position and the second position, extend the antenna cover into the shell cavity and fix it on the positioning member, process the end face groove on the large end face of the antenna cover as a positioning reference, and then abut the abutment ring against the large end face of the antenna cover, and connect the auxiliary positioning member to the third cylindrical body of the shell to limit the abutment ring through the limiting ring to assist in positioning the antenna cover. The present invention sets a positioning reference by utilizing the groove feature of the preset end face of the clamping margin section at the large end of the antenna cover, and has accurate positioning, is not prone to vibration during processing, has low processing difficulty, short processing cycle and high processing precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be described below.

[0018] Figure 1 A schematic structural diagram of a device for processing the inner surface of a special-shaped ceramic antenna cover according to an embodiment of the present invention;

[0019] Figure 2 It is a three-dimensional diagram of a device for processing the inner surface of a special-shaped ceramic antenna cover according to an embodiment of the present invention, wherein the auxiliary positioning member is omitted;

[0020] Figure 3 Another stereoscopic view of the device for processing the inner surface of a special-shaped ceramic antenna cover according to an embodiment of the present invention;

[0021] Figure 4 A schematic structural diagram of a housing and an auxiliary positioning member according to an embodiment of the present invention;

[0022] Figure 5 A schematic diagram of the structure of a positioning member before and after processing according to an embodiment of the present invention;

[0023] Figure 6 A schematic structural diagram of a support member according to an embodiment of the present invention;

[0024] Figure 7 The present invention is a simplified structural diagram of a turntable connecting member according to an embodiment of the present invention. DETAILED DESCRIPTION

[0025] In order to make the objectives, technical solutions and advantages of the present invention more clear, various aspects of the present invention will be described in detail below in conjunction with specific embodiments. However, these specific embodiments are only used to illustrate the present invention and do not constitute any limitation on the scope of protection and essential content of the present invention.

[0026] This embodiment provides a device for processing the inner surface of a special-shaped ceramic antenna cover, including a processing mechanism and a positioning mechanism. Figure 1-7 As shown, the processing mechanism includes a base 1, a turntable seat 2 arranged at one end of the base 1 and a processing piece 3 arranged above the base 1. The turntable seat 2 is rotatably connected to a turntable 4, and the turntable 4 is arranged opposite to the processing piece 3. In this embodiment, the base 1 of the processing mechanism can be the base of a horizontal CNC grinder, and the turntable seat 2 and the turntable 4 can be the turntable seat and turntable structure of the horizontal CNC grinder. A linkage can be installed on the turntable, which is connected to the CNC system of the grinder, and can provide real-time feedback on the precise rotation angle of the turntable, so as to facilitate the linkage with the processing piece 3. The positioning mechanism includes a shell 5, a positioning member 6 and a support member 7. The shell 5 is provided with a shell inner cavity, and the outer contour of the positioning member 6 is consistent with the shell inner cavity. A positioning portion that matches the outer part of the shell 5 is provided in the middle of the support member 7. A positioning station is preset in the middle of the positioning member 6, which is used to process a positioning hole 61 according to the shape of the antenna cover to position antenna covers of different specifications. A first connecting member 51 for connecting to the turntable 4 is disposed at one end of the housing 5 , and a second connecting member for connecting to the base 1 is disposed at the bottom of the supporting member 7 .

[0027] In this embodiment, a first mounting seat 11 is provided above the base 1, a second mounting seat 12 is provided above the first mounting seat 11, and the second mounting seat 12 can move left and right relative to the first mounting seat 11; a third mounting seat 13 is provided above the second mounting seat 12, a workpiece mounting seat 14 is provided above the third mounting seat 13, the workpiece 3 is provided on the workpiece mounting seat 14, and the workpiece mounting seat 14 can move forward and backward relative to the third mounting seat 13. In this embodiment, the specific movement method is not limited, for example, relative movement can be achieved with the help of guide rails, grooves matching the guide rails, and power devices such as cylinders and electric push rods; for another example, relative movement can be achieved with the help of a lead screw structure. In this embodiment, the setting relationship between the workpiece and the workpiece mounting seat is not limited, as long as the workpiece can be driven by power to operate.

[0028] In this embodiment, the workpiece 3 includes a grinding shaft 31 and a tool 32 connected to the grinding shaft 31 . The grinding shaft 31 is L-shaped, and the tool 32 is detachably connected to the grinding shaft 31 .

[0029] In this embodiment, according to the shape of the radome, the positioning hole 61 processed by the positioning station preset in the middle of the positioning member 6 matches the contour of any position outside the radome; a plurality of machinable gaskets 62 are provided on the inner wall of the positioning hole 61 along its circumferential direction to position the radome through the machinable gaskets 62. Preferably, in this embodiment, the number of positioning members 6 is two, and the positioning holes 61 of the two positioning members 6 match the corresponding outer contours of the radome at the first position and the second position of the shell 5 respectively; the first position is 20 to 25 cm from the shell end on the same side of the large end face of the radome, and the second position is 145 to 150 cm from the shell end on the same side of the large end face of the radome. In this embodiment, the positioning member can be positioned on the inner cavity wall of the shell by any form of auxiliary positioning method, such as by inserting AB glue for bonding and positioning through the notch opened on the shell. In this embodiment, the corresponding outer contours of the radome at the first position and the second position refer to the outer contours of the radome at the first position and the second position when the radome is extended into the inner cavity of the shell. In this embodiment, preferably, the X-axis of the horizontal CNC grinder and the C-axis origin of the turntable can be used as the reference for CNC programming, and the positioning holes can be processed based on the programming of the digital model at 20 to 25 cm and 145 to 150 cm from the large end of the outer surface of the antenna cover to be processed.

[0030] In this embodiment, the positioning part in the middle of the support member 7 includes an opening 71 and a support column 72 connected to the opening wall, the support column 72 is arranged on the opening wall at intervals around the opening 71, and the support column 72 extends from the opening wall to the center of the opening 71; the length of the support column 72 meets the following conditions: the support member 7 is sleeved on the outside of the shell 5 through the opening 71 and the support column 72, the support column 72 is in contact with the outside of the shell 5 and does not hinder the rotation of the shell 5; a positioning seat 73 is provided at the bottom of the support member 7, and a second connecting member is provided on the positioning seat 73. In this embodiment, the second connecting member can be a through hole, which is connected to the through hole provided on the base 1 by bolts.

[0031] In this embodiment, the first connecting member 51 at one end of the housing 5 is connected to the turntable 4 through the turntable connecting member 8; the turntable connecting member 8 includes a first connecting disk 81 and a second connecting disk 82 arranged opposite to the first connecting disk 81, and the first connecting disk 81 is connected to the second connecting disk 82; the first connecting member 51 is connected to the first connecting disk 81, and the turntable 4 is connected to the second connecting disk 82. In this embodiment, preferably, the first connecting member 51 is a through hole, and the first connecting disk 81, the turntable 4, and the second connecting disk 82 are all provided with through holes, and are connected by bolts.

[0032] In this embodiment, the device for processing the inner surface of the special-shaped ceramic antenna cover further includes an auxiliary positioning member 9 . The shell 5 includes a first cylindrical body 52, a second cylindrical body 53 connected to the first cylindrical body 52, and a third cylindrical body 54 connected to one end of the second cylindrical body 53 away from the first cylindrical body 52. ​​The outer diameter of the first cylindrical body 52 is smaller than the outer diameter of the second cylindrical body 53 and smaller than the outer diameter of the third cylindrical body 54. The first connecting member 51 is arranged at one end of the first cylindrical body 52 away from the second cylindrical body 53. The outer wall of the end of the third cylindrical body 54 away from the second cylindrical body 53 is provided with an external thread (not shown in the figure); the auxiliary positioning member 9 is hollow inside and matches the external thread end of the third cylindrical body 54. The inner wall of the auxiliary positioning member 9 is provided with an internal thread, and the auxiliary positioning member 9 and the third cylindrical body 54 can be threadedly connected; a limiting ring 91 is provided at the bottom of the auxiliary positioning member 9, and the limiting ring 91 can limit the abutting ring 10 abutting against the large end surface of the antenna cover to assist in positioning the antenna cover; the first cylindrical body 52 is provided with a plurality of notches 55 arranged along its circumference; the support member 7 is sleeved on the outside of the second cylindrical body 53. In this embodiment, the antenna cover to be processed is placed in the inner cavity of the shell with the small end facing forward and the large end facing backward (the large end is far away from the turntable, and the small end is close to the turntable), and then fixed by the positioning piece. The bottom surface of the large end of the antenna cover is processed flat by regional CNC grinding and an end surface groove is processed as a positioning reference. Then, the abutment ring is abutted against the large end surface of the antenna cover, and the auxiliary positioning piece is connected to the third cylindrical body of the shell to limit the abutment ring through the limit ring to assist in positioning the antenna cover. The axis of the antenna cover coincides with the axis of the auxiliary positioning piece. The positioning piece, the abutment ring and the auxiliary positioning piece can accurately position the antenna cover.

[0033] The present embodiment also provides a method for processing the inner surface of a special-shaped ceramic radome, which uses the device for processing the inner surface of a special-shaped ceramic radome of the present embodiment to sequentially perform initial positioning and alignment of the radome workpiece, rough machining of the inner surface, semi-finishing of the inner surface, finishing of the inner surface, removal of end face machining allowance, and measurement of machining accuracy to complete the machining of the inner surface of the special-shaped ceramic radome.

[0034] In this embodiment, the specific process of initial positioning and alignment of the antenna cover to be processed is as follows: connect the shell to the turntable, sleeve the support member on the outside of the second cylindrical body of the shell and connect the bottom of the support member to the base, mark the first position and the second position of the shell, and then bond the positioning member to the shell cavity corresponding to the first position and the second position, and process the positioning station preset in the middle of the positioning member with the outer contour of the antenna cover corresponding to the first position and the second position when the antenna cover is in a state of extending into the shell cavity, and process the positioning hole matching the corresponding outer contour of the antenna cover at the first position and the second position, and arrange a number of machinable gaskets on the inner wall of the positioning hole along the circumferential interval, and trim the machinable gaskets to match the corresponding outer contour of the antenna cover at the first position and the second position, extend the antenna cover into the shell cavity and fix it on the positioning member, and process the end face groove on the large end face of the antenna cover as a positioning reference, and then abut the abutment ring against the large end face of the antenna cover, and connect the auxiliary positioning member to the third cylindrical body of the shell to limit the abutment ring through the limiting ring to assist in positioning the antenna cover. In this example, a dial indicator is used to measure the swing of the large and small ends of the antenna cover after positioning to determine the degree of fit between the antenna cover and the positioning piece. If the runout value of the dial indicator is no more than 0.05mm, the positioning is intact. If the runout value of the dial indicator is more than 0.05mm, reposition it until the runout value of the dial indicator is no more than 0.05mm.

[0035] Internal surface rough machining: With the end face groove plane as the reference, set the zero point of the Z axis of the machining mechanism representing the left and right direction, and with the shell axis as the reference, set the zero point of the X axis of the machining mechanism representing the front and back direction, and perform rough grinding of the internal surface of the antenna cover by electroplating trapezoidal grinding wheel. In this embodiment, a finishing allowance of 5mm is reserved on one side during rough machining.

[0036] Semi-finishing of inner surface: After the rough machining of the inner surface is completed, the electroplated trapezoidal grinding wheel of other specifications is used to semi-finish the inner surface of the antenna cover. In this embodiment, a finishing allowance of 2mm is reserved on one side during semi-finishing. After the machining is completed, the TANGO-S three-dimensional laser scanner is used to perform online dimension detection on the semi-finished inner surface, and the antenna cover body is divided into 4 busbars according to the digital model to confirm the actual finishing allowance of the 4 busbars. If the dimension detection result shows that the dimension tolerance of the inner surface machining is not ±0.3mm, the inner surface semi-finishing is repeated until the dimension detection result shows that the dimension tolerance of the inner surface machining is ±0.3mm.

[0037] Finishing of inner surface: After the semi-finishing of the inner surface is completed, the inner surface of the antenna cover is finished by electroplating trapezoidal grinding wheel to ensure that the inner surface processing size tolerance is ±0.2mm. After the processing is completed, the TANGO-S three-dimensional laser scanner is used to perform online size detection on the finished inner surface. If the size detection result shows that the inner surface processing size tolerance is not ±0.2mm, the inner surface finishing is repeated until the size detection result shows that the inner surface processing size tolerance is ±0.2mm.

[0038] Remove the end face machining allowance and measure the machining accuracy: disassemble the radome after the outer surface is finely machined, grind off the end face machining allowance of the radome in different areas, use TANGO-S 3D laser scanner and Inspector152212 three-dimensional coordinate measuring instrument to detect the dimensional accuracy and shape and position accuracy to obtain the finished radome.

[0039] The present invention has been described above in conjunction with specific embodiments. These specific embodiments are merely exemplary and cannot be used to limit the scope of protection of the present invention. Those skilled in the art may make various modifications, changes or substitutions without departing from the essence of the present invention. Therefore, various equivalent changes made according to the present invention still fall within the scope covered by the present invention.

Claims

1. A device for processing the inner surface of a special-shaped ceramic antenna cover, characterized in that: Including processing mechanism and positioning mechanism, The processing mechanism includes a base, a turntable seat arranged at one end of the base, and a processing piece arranged above the base, a turntable is rotatably connected to the turntable seat, and the turntable and the processing piece are arranged opposite to each other; The positioning mechanism comprises a shell, a positioning member and a support member, the shell is provided with a shell inner cavity, the outer contour of the positioning member matches the shell inner cavity, the middle part of the support member is provided with a positioning portion that matches the outer part of the shell, and the middle part of the positioning member is preset with a positioning station, which is used to process a positioning hole according to the shape of the antenna cover to position antenna covers of different specifications; A first connecting piece for connecting with the turntable is arranged at one end of the shell, and a second connecting piece for connecting with the base is arranged at the bottom of the support piece.

2. The device for processing the inner surface of a special-shaped ceramic antenna cover according to claim 1, characterized in that: A first mounting seat is provided above the base, a second mounting seat is provided above the first mounting seat, and the second mounting seat can move left and right relative to the first mounting seat; A third mounting seat is arranged above the second mounting seat, a processing piece mounting seat is arranged above the third mounting seat, the processing piece is arranged on the processing piece mounting seat, and the processing piece mounting seat can move forward and backward relative to the third mounting seat.

3. The device for processing the inner surface of a special-shaped ceramic antenna cover according to claim 2, characterized in that: The processing part comprises a grinding shaft and a tool connected to the grinding shaft. The grinding shaft is L-shaped, and the tool is detachably connected to the grinding shaft.

4. The device for processing the inner surface of a special-shaped ceramic antenna cover according to claim 1, characterized in that: According to the shape of the antenna cover, a positioning hole processed at a positioning station preset in the middle of the positioning piece matches the contour of any position outside the antenna cover; a plurality of machinable gaskets are arranged on the inner wall of the positioning hole at intervals along its circumference to position the antenna cover through the machinable gaskets.

5. The device for processing the inner surface of a special-shaped ceramic antenna cover according to claim 4, characterized in that: There are two positioning members, and the positioning holes of the two positioning members match the corresponding outer contours of the antenna cover at the first position and the second position of the shell respectively; the first position is a position 20 to 25 cm away from the shell end on the same side as the large end face of the antenna cover, and the second position is a position 145 to 150 cm away from the shell end on the same side as the large end face of the antenna cover.

6. The device for processing the inner surface of a special-shaped ceramic antenna cover according to claim 1, characterized in that: The positioning part in the middle of the support member includes an opening and a support column connected to the opening wall, the support column is arranged on the opening wall at circumferential intervals around the opening, and the support column extends from the opening wall to the center of the opening; the length of the support column meets the following conditions: the support member is sleeved on the outside of the shell through the opening and the support column, the support column is in contact with the outside of the shell and does not hinder the rotation of the shell; a positioning seat is provided at the bottom of the support member, and the second connecting member is provided on the positioning seat.

7. The device for processing the inner surface of a special-shaped ceramic antenna cover according to claim 1, characterized in that: The first connecting member at one end of the shell is connected to the turntable through a turntable connecting member; the turntable connecting member includes a first connecting disk and a second connecting disk arranged opposite to the first connecting disk, and the first connecting disk is connected to the second connecting disk; the first connecting member is connected to the first connecting disk, and the turntable is connected to the second connecting disk.

8. The device for processing the inner surface of a special-shaped ceramic antenna cover according to claim 1, characterized in that: The auxiliary positioning member is also included; the shell includes a first cylinder, a second cylinder connected to the first cylinder and a third cylinder connected to one end of the second cylinder away from the first cylinder, the outer diameter of the first cylinder is smaller than the outer diameter of the second cylinder and smaller than the outer diameter of the third cylinder, the first connecting member is arranged at one end of the first cylinder away from the second cylinder, and the outer wall of the end of the third cylinder away from the second cylinder is provided with an external thread; the auxiliary positioning member is hollow inside and matches with the external thread end of the third cylinder, the inner wall of the auxiliary positioning member is provided with an internal thread, and the auxiliary positioning member and the third cylinder can be threadedly connected; a limiting ring is provided at the bottom of the auxiliary positioning member, and the limiting ring can limit the abutting ring abutting against the large end face of the antenna cover to assist in positioning the antenna cover; the first cylinder is provided with a plurality of notches arranged along its circumference; the support member is sleeved on the outside of the second cylinder.

9. A method for processing the inner surface of a special-shaped ceramic antenna cover, characterized in that: By using the device for processing the inner surface of the special-shaped ceramic radome as described in any one of claims 1 to 8, the initial positioning and alignment of the radome workpiece, rough processing of the inner surface, semi-finishing of the inner surface, finishing of the inner surface, removal of the end surface processing allowance and measurement of the processing accuracy are performed in sequence to complete the processing of the inner surface of the special-shaped ceramic radome.

10. The method for processing the inner surface of a special-shaped ceramic radome according to claim 9, characterized in that: The specific process of the initial positioning and alignment of the antenna cover to be processed is as follows: connect the shell with the turntable, sleeve the support member on the outside of the second cylindrical body of the shell and connect the bottom of the support member to the base, mark the first position and the second position of the shell, and then bond the positioning member to the shell cavity corresponding to the first position and the second position, and process the positioning station preset in the middle of the positioning member with the outer contour of the antenna cover corresponding to the first position and the second position when the antenna cover is in a state of extending into the shell cavity, and process the positioning hole matching the corresponding outer contour of the antenna cover at the first position and the second position, and arrange a plurality of machinable gaskets on the inner wall of the positioning hole along the circumferential interval, and trim the machinable gaskets to match the corresponding outer contour of the antenna cover at the first position and the second position, extend the antenna cover into the shell cavity and fix it on the positioning member, and process the end face groove on the large end face of the antenna cover as a positioning reference, and then abut the abutment ring abuts against the large end face of the antenna cover, and connect the auxiliary positioning member to the third cylindrical body of the shell to limit the abutment ring through the limiting ring to assist in positioning the antenna cover.

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