Special tool for testing and tuning mass distribution defects of uncoated resonator

Abstract

The application relates to a special tool for testing and adjusting the mass distribution defects of an uncoated resonator, and belongs to the field of testing and adjusting a quartz hemispherical resonator. The lower base and the upper base are both in the shape of a cylinder arranged axially and vertically; the upper base is coaxially arranged on the top of the lower base; a transmission shaft is arranged axially and vertically at the shaft center of the upper base and the lower base; two groups of ball bearings are respectively sleeved on the upper and lower ends of the transmission shaft; the upper ball bearing is arranged on the inner wall of the upper base; the lower ball bearing is arranged on the inner wall of the lower base; the top end of the transmission shaft is provided with a taper hole; a collet is embedded in the taper hole; a locking nut is sleeved on the outer wall at the joint of the collet and the transmission shaft; a interdigital capacitor seat is coaxially arranged on the top end of the upper base; an interdigital capacitor is coaxially arranged on the top of the interdigital capacitor seat; a fixing stud is arranged on the top of the collet; the uncoated resonator and the interdigital capacitor can be fixed, the resonator can rotate relative to the interdigital capacitor, and the gap between the resonator and the interdigital capacitor can be ensured.

Description

Technical Field

[0001] This invention belongs to the field of quartz hemispherical resonator testing and adjustment, and relates to a special tooling for testing and adjusting the mass distribution defects of uncoated resonators. Background Technology

[0002] The quartz hemispherical resonator, as the core component of a hemispherical resonator gyroscope, largely determines the gyroscope's accuracy. However, resonators inevitably possess some degree of mass distribution defects after manufacturing. Testing and adjusting these defects is a key manufacturing technology for improving hemispherical resonator performance and thus determines the overall performance of the hemispherical resonator gyroscope. To identify and correct mass defects in the uncoated resonator, a fixture is needed that can uniformly fix and rotate the uncoated resonator, and fix and fine-tune the interdigitated capacitors while maintaining a constant relative gap between the resonator and the interdigitated capacitors. However, currently, there is no specific device capable of achieving these effects. Summary of the Invention

[0003] The technical problem solved by this invention is to overcome the shortcomings of the prior art and propose a special tooling for testing and adjusting the mass distribution defects of uncoated resonators. It can fix the uncoated resonator and the interdigitated capacitor, and the resonator can rotate relative to the interdigitated capacitor while ensuring their gap.

[0004] The solution of the present invention is:

[0005] Specialized tooling for testing and adjusting the mass distribution defects of uncoated resonators, including an upper base, a lower base, a collet, a lock nut, a drive shaft, two sets of ball bearings, interdigitated capacitors, a fixing stud, and an interdigitated capacitor holder;

[0006] The system comprises: a lower base, an upper base, and a lower base. The upper base is coaxially positioned on top of the lower base. The drive shaft is vertically positioned at the axis of both the upper and lower bases. Two sets of ball bearings are respectively fitted onto the upper and lower ends of the drive shaft. The upper ball bearing is located on the inner wall of the upper base, and the lower ball bearing is located on the inner wall of the lower base. A tapered hole is provided at the top of the drive shaft. A collet is embedded in the tapered hole. A locking nut is fitted onto the outer wall of the joint between the collet and the drive shaft. A forked capacitor base is coaxially positioned on top of the upper base. The forked capacitor is coaxially mounted on top of the forked capacitor base. A fixing stud is mounted on top of the collet.

[0007] In the aforementioned special tooling for testing and adjusting the mass distribution defects of the uncoated resonator, the interdigitated capacitor is a hemispherical structure with a through hole in the center; the through hole exposes the fixing stud; a slot is provided at the center of the top of the fixing stud.

[0008] In the aforementioned special tooling for testing and adjusting the mass distribution defects of the uncoated resonator, the external resonator is an umbrella-shaped structure. When installing the external resonator, the umbrella handle of the external resonator is vertically fixed in the slot of the fixing stud. The umbrella surface of the external resonator overlaps the hemispherical structure at the top of the interdigitated capacitor. The curvature of the hemispherical structure at the top of the interdigitated capacitor corresponds to the curvature of the umbrella surface of the external resonator.

[0009] The special fixture for testing and adjusting the mass distribution defects of the uncoated resonator described above uses a rotating drive shaft to sequentially drive the collet, the fixing stud, and the external resonator to rotate coaxially. The change in electrical signal generated by the relative rotation of the external resonator's rotating umbrella surface and the interdigitated capacitor is used to test the mass defects of the external resonator. When adjusting the mass of the external resonator, the drive shaft is rotated, and the change in electrical signal generated by the external resonator's rotating umbrella surface and the interdigitated capacitor is used to check the adjustment status in real time.

[0010] In the aforementioned special tooling for testing and adjusting the mass distribution defects of the uncoated resonator, n wiring slots are provided on the top outer wall of the upper base; the wiring slots are arranged in the radial direction; the n wiring slots are evenly distributed in the circumferential direction, and the included angle between two adjacent wiring slots is 20°-30°; the width of the wiring slots is 0.5-2mm; the leads of the interdigital capacitors are led out through the wiring slots respectively.

[0011] In the aforementioned special tooling for testing and adjusting the mass distribution defects of the uncoated resonator, the thread pitch of the locking nut is 0.2mm to 2mm; the diameter of the through hole is 6mm to 10mm; the length is 25mm to 35mm; and the locking nut is a hexagonal structure with a side length of 10mm to 14mm.

[0012] In the aforementioned specialized tooling for testing and adjusting the mass distribution defects of the uncoated resonator, the collet is an AAA or UP grade ER8 spring collet with a 3 / 16-inch aperture.

[0013] In the aforementioned special tooling for testing and adjusting the mass distribution defects of the uncoated resonator, the axial ends of the drive shaft are cylindrical structures to achieve cooperation with two sets of ball bearings; the diameter of the cylindrical structures at both ends of the drive shaft is 8mm to 10mm; the outer wall of the upper cylindrical structure is provided with a thread with a pitch of 0.2-2mm and a length of 4-10mm; the cone angle of the tapered hole at the top of the drive shaft is 15°-17°.

[0014] In the aforementioned special tooling for testing and adjusting the mass distribution defects of the uncoated resonator, the interdigitated capacitor seat is threadedly fitted to the upper base; the interdigitated capacitor seat has an internal thread pitch of 0.2mm to 2mm, and 10 small holes with a diameter of 0.5mm to 2mm are opened within a 0° to 360° arc range; the ball bearing is a precision bearing of P4 grade or above.

[0015] In the aforementioned special tooling for testing and adjusting the mass distribution defects of the uncoated resonator, the interdigitated capacitor has an outer spherical diameter of 20-21 mm and a central through-hole diameter of 13-14 mm.

[0016] The advantages of this invention compared to the prior art are:

[0017] (1) The present invention uses a collet clamp to hold the resonator, which increases the uniformity of the resonator clamping;

[0018] (2) The present invention uses ball bearings to reduce the runout of the harmonic oscillator during rotation;

[0019] (3) The present invention adopts a combination design of interdigitated capacitor base, interdigitated capacitor, locking nut, drive shaft and upper base to ensure the relative position and gap between the resonator and the interdigitated capacitor, and ensure the accuracy of the resonator test. Attached Figure Description

[0020] Figure 1 This is a cross-sectional view of the special tooling for testing and adjusting the quality distribution defects of the present invention;

[0021] Figure 2 This is a schematic diagram of the special tooling for testing and adjusting the quality distribution defects of the present invention. Detailed Implementation

[0022] The present invention will be further described below with reference to the embodiments.

[0023] This invention provides a special tooling for testing and adjusting the mass distribution defects of an uncoated resonator. It can fix the uncoated resonator and the interdigitated capacitor, and the resonator can rotate relative to the interdigitated capacitor while ensuring their gap.

[0024] Specialized tooling for testing and adjusting the mass distribution defects of uncoated resonators, such as... Figure 1 , Figure 2 As shown, it specifically includes an upper base 1, a lower base 2, a collet 3, a locking nut 4, a drive shaft 5, two sets of ball bearings 6, a forked capacitor 7, a fixing stud 8, a forked capacitor seat 9, and a cable clamp 10.

[0025] The lower base 2 is a cylindrical structure with a vertical axial orientation; the upper base 1 is a cylindrical structure with a vertical axial orientation; the upper base 1 is coaxially mounted on the top of the lower base 2; the drive shaft 5 is vertically mounted at the axis of the upper base 1 and the lower base 2; two sets of ball bearings 6 are respectively fitted on the upper and lower ends of the drive shaft 5; the upper ball bearing 6 is located on the inner wall of the upper base 1; the lower ball bearing 6 is located on the inner wall of the lower base 2; a tapered hole is provided at the top of the drive shaft 5; the collet 3 is embedded in the tapered hole; the locking nut 4 is fitted on the outer wall of the joint between the collet 3 and the drive shaft 5; the interdigitated capacitor seat 9 is coaxially mounted on the top of the upper base 1; the interdigitated capacitor 7 is coaxially mounted on the top of the interdigitated capacitor seat 9; and the fixing stud 8 is mounted on the top of the collet 3.

[0026] During assembly, the two ball bearings 6 are installed with the drive shaft 5 to form a rotating assembly. Then, the collet 3 is installed into the tapered hole of the rotating shaft, and the collet is tightened with the lock nut 4. The rotating assembly is then installed with the upper base 1 and the lower base 2, and the upper and lower bases are fixed with screws through the threaded holes. The interdigitated capacitor seat 9 is installed on the upper base, and the cables are arranged sequentially through the cable routing groove of the upper base. The cables are fixed to the upper base with screws using the cable clamp 10. The interdigitated capacitor is fixed to the upper base using the fixing stud 8. The runout of the outer spherical surface of the interdigitated capacitor 7 is detected and adjusted using a dial indicator to ensure that the runout is less than 5μm per revolution. The rotating shaft of the equipment is fixed to the lower part of the tooling drive shaft 5 with a set screw using a flexible coupling, thus completing the rotation of the resonator. This completes the installation of the special tooling for testing and adjusting the mass distribution defects of the uncoated resonator.

[0027] The interdigitated capacitor 7 is a hemispherical structure with a through hole at its center; the through hole exposes the fixing stud 8; a slot is provided at the center of the top of the fixing stud 8. The external resonator is an umbrella-shaped structure; when installing the external resonator, the umbrella handle of the external resonator is vertically fixed in the slot of the fixing stud 8; the umbrella surface of the external resonator overlaps the hemispherical structure at the top of the interdigitated capacitor 7; the curvature of the hemispherical structure at the top of the interdigitated capacitor 7 corresponds to the curvature of the umbrella surface of the external resonator.

[0028] The quality defect testing and adjustment process of this invention is as follows:

[0029] By rotating the drive shaft 5, the collet 3, the fixed stud 8, and the external resonator are driven to rotate coaxially in sequence. The change in electrical signal generated by the relative rotation of the external resonator's rotating umbrella surface and the interdigitated capacitor 7 is used to test the quality defects of the external resonator. When adjusting the quality of the external resonator, the drive shaft 5 is rotated, and the change in electrical signal generated by the external resonator's rotating umbrella surface and the interdigitated capacitor 7 is used to check the adjustment status in real time.

[0030] The top outer wall of the upper base 1 is provided with n wiring grooves; the wiring grooves are arranged in the radial direction; the n wiring grooves are evenly distributed in the circumferential direction, and the included angle between two adjacent wiring grooves is 20°-30°; the width of the wiring grooves is 0.5-2mm; the leads of the interdigital capacitors 7 are led out through the wiring grooves respectively.

[0031] The thread pitch of the locking nut 4 is 0.2mm to 2mm; the diameter of the through hole is 6mm to 10mm; the length is 25mm to 35mm; the locking nut 4 is a hexagonal structure with a side length of 10mm to 14mm.

[0032] Collet 3 is an AAA or UP grade ER8 spring collet with a 3 / 16-inch aperture.

[0033] The axial ends of the drive shaft 5 are cylindrical structures to achieve cooperation with two sets of ball bearings 6; the diameter of the cylindrical structures at both ends of the drive shaft 5 is 8mm to 10mm; the outer wall of the upper cylindrical structure is provided with a thread with a pitch of 0.2-2mm and a length of 4-10mm; the cone angle of the tapered hole at the top of the drive shaft 5 is 15°-17°.

[0034] The interdigitated capacitor base 9 is threadedly fitted to the upper base 1; the interdigitated capacitor base 9 has an internal thread pitch of 0.2mm to 2mm, and 10 small holes with a diameter of 0.5mm to 2mm are opened within the arc range of 0° to 360°; the ball bearing 6 is a precision bearing of P4 grade or above.

[0035] The interdigitated capacitor 7 has an outer spherical diameter of 20-21 mm; the diameter of the central through hole in the interdigitated capacitor 7 is 13-14 mm.

[0036] The fixing stud 6 of the present invention has an M13 external thread with a pitch of 0.2mm to 2mm, a length of 2mm to 6mm, a total length of 6mm to 10mm, an inner diameter of 8mm to 12mm, and a cross groove.

[0037] The lower base 2 has a rectangular opening on one side that is 15mm to 20mm wide and 10mm to 15mm high.

[0038] This invention increases the uniformity of resonator clamping by using collets; reduces runout during resonator rotation by using ball bearings; and ensures the relative position and gap between the resonator and the resonator by using a combination design of interdigitated capacitor holder, interdigitated capacitor, locking nut, drive shaft and upper base, thus ensuring the accuracy of resonator testing.

[0039] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications to the technical solutions of the present invention by utilizing the methods and techniques disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention shall fall within the protection scope of the technical solutions of the present invention.

Claims

1. A special tooling for testing and adjusting the mass distribution defects of an uncoated resonator, characterized in that: It includes an upper base (1), a lower base (2), a collet (3), a locking nut (4), a drive shaft (5), two sets of ball bearings (6), a forked capacitor (7), a fixing stud (8), and a forked capacitor seat (9); Among them, the lower base (2) is a cylindrical structure with the axial direction vertically arranged; the upper base (1) is a cylindrical structure with the axial direction vertically arranged; the upper base (1) is coaxially arranged on the top of the lower base (2); the transmission shaft (5) is axially arranged vertically at the axis of the upper base (1) and the lower base (2); two sets of ball bearings (6) are respectively fitted on the upper and lower ends of the transmission shaft (5); the upper ball bearing (6) is located on the inner wall of the upper base (1); the lower ball bearing (6) is located on the inner wall of the lower base (2); the top end of the transmission shaft (5) is provided with a tapered hole; the collet (3) is embedded in the tapered hole; the locking nut (4) is fitted on the outer wall of the joint between the collet (3) and the transmission shaft (5); the interdigitated capacitor seat (9) is coaxially arranged on the top end of the upper base (1); the interdigitated capacitor (7) is coaxially installed on the top of the interdigitated capacitor seat (9); the fixing stud (8) is installed on the top of the collet (3).

2. The special tooling for testing and adjusting the mass distribution defects of an uncoated resonator according to claim 1, characterized in that: The interdigitated capacitor (7) is a hemispherical structure with a through hole in the center; the through hole allows the fixing stud (8) to be exposed; a slot is provided at the center of the top of the fixing stud (8).

3. The special tooling for testing and adjusting the mass distribution defects of an uncoated resonator according to claim 2, characterized in that: The external resonator has an umbrella-shaped structure. When installing the external resonator, the umbrella handle of the external resonator is vertically fixed in the slot of the fixing stud (8). The umbrella surface of the external resonator overlaps the hemispherical structure at the top of the interdigital capacitor (7). The curvature of the hemispherical structure at the top of the interdigital capacitor (7) corresponds to the curvature of the umbrella surface of the external resonator.

4. The special tooling for testing and adjusting the mass distribution defects of an uncoated resonator according to claim 3, characterized in that: By rotating the drive shaft (5), the collet (3), the fixed stud (8), and the external resonator are driven to rotate coaxially in sequence. The change in electrical signal generated by the relative rotation of the external resonator's rotating umbrella surface and the interdigitated capacitor (7) is used to test the quality defects of the external resonator. When adjusting the quality of the external resonator, the drive shaft (5) is rotated, and the change in electrical signal generated by the external resonator's rotating umbrella surface and the interdigitated capacitor (7) is used to check the adjustment status in real time.

5. The special tooling for testing and adjusting the mass distribution defects of an uncoated resonator according to claim 1, characterized in that: The top outer wall of the upper base (1) is provided with n wiring grooves; the wiring grooves are arranged in the radial direction; the n wiring grooves are evenly distributed in the circumferential direction, and the included angle between two adjacent wiring grooves is 20°-30°; the width of the wiring grooves is 0.5-2mm; the leads of the interdigital capacitors (7) are led out through the wiring grooves respectively.

6. The special tooling for testing and adjusting the mass distribution defects of an uncoated resonator according to claim 1, characterized in that: The locking nut (4) has a thread pitch of 0.2mm to 2mm, a through hole diameter of 6mm to 10mm, a length of 25mm to 35mm, and is a hexagonal structure with a side length of 10mm to 14mm.

7. The special tooling for testing and adjusting the mass distribution defects of an uncoated resonator according to claim 1, characterized in that: The collet (3) is an AAA or UP grade ER8 spring collet with a 3 / 16-inch aperture.

8. The special tooling for testing and adjusting the mass distribution defects of an uncoated resonator according to claim 1, characterized in that: The axial ends of the drive shaft (5) are cylindrical structures to achieve cooperation with two sets of ball bearings (6); the diameter of the cylindrical structures at both ends of the drive shaft (5) is 8mm to 10mm; the outer wall of the upper cylindrical structure is provided with a thread with a pitch of 0.2-2mm and a length of 4-10mm; the cone angle of the tapered hole at the top of the drive shaft (5) is 15°-17°.

9. The special tooling for testing and adjusting the mass distribution defects of an uncoated resonator according to claim 1, characterized in that: The interdigitated capacitor seat (9) is threadedly fitted to the upper base (1); the interdigitated capacitor seat (9) has an internal thread pitch of 0.2mm to 2mm, and 10 small holes with a diameter of 0.5mm to 2mm are opened within the arc range of 0° to 360°; the ball bearing (6) is a precision bearing of P4 level or above.

10. The special tooling for testing and adjusting the mass distribution defects of an uncoated resonator according to claim 2, characterized in that: The interdigitated capacitor (7) has an outer spherical diameter of 20-21 mm; the diameter of the central through hole of the interdigitated capacitor (7) is 13-14 mm.

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