CN214213364U

CN214213364U - Spring type polishing device with adjustable gravity center

Info

Publication number: CN214213364U
Application number: CN202022814746.XU
Authority: CN
Inventors: 邱磊; 柯晓龙
Original assignee: Xiamen University of Technology
Current assignee: Xiamen University of Technology
Priority date: 2020-11-29
Filing date: 2020-11-29
Publication date: 2021-09-17
Anticipated expiration: 2030-11-29

Abstract

The utility model discloses a spring type polishing device with adjustable gravity center, which comprises a polishing disk, a power spindle, a spindle motor, a bracket and a gravity center adjusting mechanism; the polishing disk is connected with the lower end of the power main shaft, and the polishing disk and the power main shaft are flexibly connected; the top of the power main shaft is connected with a main shaft motor; the gravity center adjusting mechanism comprises a telescopic motor, a sleeve, a spring and a universal ball bearing; a motor shaft of the telescopic motor is fixedly connected with the upper part of the sleeve; the spring is arranged in the sleeve; the upper part of the universal ball bearing extends into the sleeve from a through hole arranged below the sleeve and is linked with the spring, and the bottom of the universal ball bearing can be pressed on the top surface of the polishing disk; the spindle motor and the telescopic motor are mounted on the support. The utility model discloses utilize flexible motor cooperation spring mode, later reach the problem that reduces the edge effect through the focus of adjusting polishing dish, and can realize real-time accurate control.

Description

Spring type polishing device with adjustable gravity center

Technical Field

The utility model belongs to the technical field of the optical element finish machining, a polishing machining tool and polishing method of optical element precision polishing are related to, in particular to adjustable focus burnishing device of spring.

Background

In the field of optical element finishing technology, no matter classical machining or computer controlled surface forming technology (CCOS), when the edge area of a workpiece is machined, the contact pressure is increased due to the fact that the contact area is reduced (because the polishing disc partially extends out of the workpiece) and the polishing stress is not changed, so that the removal amount of the edge of the workpiece is increased, and the edge effect phenomenon of 'edge collapse' is caused, and the edge effect can seriously hinder the convergence of the surface shape error of the workpiece and even reduce the effective caliber of the workpiece.

The chinese patent application No. 201910092105.7 discloses an optical element polishing tool and a polishing method, the tool does not need to install a splice block for auxiliary processing, the movement range of a grinding disc is extended to the outer region of the element, the grinding disc does not overturn, the processing conditions of the edge region and the middle region of the element are consistent, the edge effect problems such as edge collapse or edge warping surface shape are effectively eliminated, and the high-precision processing of the full-aperture surface shape of the optical element is realized.

Cn201610836440.x discloses a polishing assembly for adjusting pressure distribution at edge area of optical element, which is used for adjusting pressure distribution at edge area of optical element during polishing process of edge area of optical element, so as to change material removal distribution at edge area and suppress edge effect. However, the technology can only change the position of the polishing component through the movable joint, so as to change the force application position to the polishing disk, but cannot adjust the force application size, and further cannot solve the purpose of online adjustment according to the actual processing requirement.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a spring adjustable focus burnishing device is provided, its focus through adjusting the polishing dish reaches the problem that reduces the edge effect, and can realize real-time accurate control.

In order to solve the technical problem, the technical solution of the utility model is that:

a spring type polishing device with adjustable gravity center comprises a polishing disk, a power main shaft, a main shaft motor, a bracket and a gravity center adjusting mechanism; the polishing disk is connected with the lower end of the power main shaft, and the polishing disk and the power main shaft are flexibly connected; the top of the power main shaft is connected with a main shaft motor; the gravity center adjusting mechanism comprises a telescopic motor, a sleeve, a spring and a universal ball bearing; a motor shaft of the telescopic motor is fixedly connected with the upper part of the sleeve; the spring is arranged in the sleeve; the upper part of the universal ball bearing extends into the sleeve from a through hole arranged below the sleeve and is linked with the spring, and the bottom of the universal ball bearing can be pressed on the top surface of the polishing disk; the spindle motor and the telescopic motor are mounted on the support.

Preferably, the flexible connection structure between the polishing disk and the power spindle is as follows: the polishing disc is provided with a polishing disc, a pair of cylindrical lugs is arranged at the bottom of the power spindle, a mounting hole is formed in the polishing disc, a straight groove is formed in the mounting hole, and the cylindrical lugs and the straight groove are matched and clamped to form flexible connection.

Preferably, the sleeve consists of a cylinder body with a closed bottom and an end cover covering the cylinder body.

Preferably, the top of the universal ball bearing is provided with a screw, the sleeve is internally provided with a nut, and the screw extends into the sleeve from the through hole and then is locked with the nut.

Preferably, the bottom of the polishing disk is provided with a polishing pad.

Preferably, the polishing pad is made of polyurethane or damping cloth material.

Preferably, the bracket comprises a motor support plate and a motor base, the motor base is arranged on the motor support plate, and the spindle motor is arranged on the motor base; the telescopic motor is arranged on the motor supporting plate.

Preferably, the gravity center adjusting mechanism is provided with one, two or more.

Preferably, the gravity center adjusting mechanism is provided with a plurality of gravity center adjusting mechanisms which are uniformly distributed on the same circumference.

After the scheme is adopted, the utility model discloses compare with current burnishing tool, the utility model discloses the advantage lies in:

1. spring focus adjustable polishing dish, replaced traditional edge polishing method, need not the supplementary splice of installation, control is simple, the operation is easy going. When the polishing disc moves to the edge area of the optical element, the polishing disc enables the stress of the edge area of the workpiece to be reduced and the stress of the middle area to be increased under the action of the elastic force of the spring, so that the effect of reverse stress compensation is achieved, the removal amount of the edge area and the removal amount of the middle area of the workpiece are consistent, the problem of edge effect can be reduced or eliminated while the machining efficiency is guaranteed, and the polishing machining of the full-aperture surface shape of the workpiece is achieved.

2. The utility model discloses a spring force can estimate through the distance that polishing dish exposes the work piece edge, then uses host computer software to control to can adjust according to the processing effect of work piece, finally eliminate edge effect problem such as the edge of collapsing, realize the polishing processing of the full bore shape of face of work piece.

3. The displacement volume that the compression volume of spring can be through flexible motor realizes accurate control, from this focus guiding mechanism can realize real-time regulation and accurate control to the effort of polishing dish.

In a word, an adjustable focus burnishing device of spring, utilize flexible motor cooperation spring mode, the focus through adjusting the polishing dish can reduce marginal effect, has easy operation, characteristics such as the practicality is strong, can automated control.

Drawings

Fig. 1 is a schematic structural diagram of a first example of the polishing disc mechanism according to the present invention (a center of gravity adjusting module is installed);

fig. 2 is a schematic structural diagram of a second example of the polishing disk mechanism according to the present invention (where three center-of-gravity adjusting modules are installed;

FIG. 3 is a schematic diagram of a cross-sectional structure of a connection between a polishing pad, a polishing disk and a power spindle of the polishing disk mechanism according to the present invention;

FIG. 4 is an external view of a spring type gravity center adjusting mechanism of the polishing disc mechanism according to the present invention;

fig. 5 is a schematic diagram of a sectional structure of a spring module of the polishing disk mechanism of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

The utility model discloses a spring type adjustable gravity center polishing device, as shown in figures 1-5, which is a preferred embodiment of the invention. The polishing disc mechanism mainly comprises a polishing disc 1, a power spindle 2, a spindle motor 3, a support 4 and a gravity center adjusting mechanism 5. Wherein:

the polishing disk 1 is connected with the lower end of the power spindle 2, and the polishing disk 1 and the power spindle are flexibly connected, so that the whole polishing disk 1 can freely deflect at a certain angle under the action of external force. The specific flexible connection structure is matched with the figure 3, the bottom of the power spindle 2 is provided with a pair of cylindrical lugs 21, the polishing disc 1 is provided with a mounting hole 11, a straight groove 12 is arranged in the mounting hole 11, and during mounting, the cylindrical lugs 21 and the straight groove 12 are matched and clamped to form flexible connection. When the polishing machine is used, the power spindle 2 provides rotary power for the polishing disk 1, and meanwhile, the polishing disk 1 can freely swing around the cylindrical lug 21 under the action of external force, so that the change of the gravity center is realized. In addition, the bottom of the polishing disk 1 may be provided with a polishing pad 13, and specifically, the bottom surface of the polishing disk 1 may be adhered with the polishing pad 13 made of polyurethane, damping cloth, or other materials as a polishing working surface.

The power spindle 2 provides power for the polishing disk 1, and the top of the power spindle is connected with the spindle motor 3. Specifically, the spindle motor 3 may be connected with the power spindle 2 using a coupling 6 to transmit power.

The support 4 is used for supporting various parts, and may include a motor support plate 41 and a motor base 42, the motor base 42 is installed on the motor support plate 41, and the spindle motor 3 and the coupling 6 are installed on the motor base 42.

The gravity center adjusting mechanism 5 includes a telescopic motor 51, a sleeve 52, a spring 53 and a universal ball bearing 54. The telescopic motor 51 is mounted on the bracket 4, and may be specifically mounted on the motor support plate 41, and a motor shaft 511 of the telescopic motor 51 is fixedly connected to the upper portion of the sleeve 52. The bottom of the sleeve 52 is provided with a through hole 521, so that for convenience of manufacturing and installation, the sleeve 52 may be composed of a cylindrical body 522 with a closed bottom and an end cover 523 covering the cylindrical body 522, and the motor shaft 511 is connected and fixed with the end cover 523. Said spring 53 is mounted in the sleeve 52. The upper part of the universal ball bearing 54 extends into the sleeve 52 from the through hole 521, and the bottom of the universal ball bearing 54 can be pressed on the top surface of the polishing disk 1 to generate pressure on the polishing disk 1 in conjunction with the linkage of the spring 53. The bottom of the universal ball bearing 54 is spherical, so that the contact surface can be reduced. In addition, in order to facilitate the interlocking mounting of the universal ball bearing 54 and the spring 53, a screw 541 may be disposed on the top of the universal ball bearing 54, a nut 542 may be disposed inside the sleeve 52, and the screw 541 may be locked with the nut 542 after extending into the sleeve 52 from the through hole 521. The work piece principle of focus guiding mechanism 5 does: the sleeve 52 moves downward by the motor shaft 511 of the telescopic motor 51, and when the universal ball bearing 54 contacts the polishing platter 1, the spring 53 starts to be compressed, and the pressure between the universal ball bearing 54 and the polishing disk 1 is equal to the elastic force of the spring 53, and the amount of compression of the spring 53 can be precisely controlled by the amount of displacement of the motor shaft 511 of the telescopic motor 51, therefore, the acting force of the spring module on the polishing disk 1 can be adjusted in real time and accurately controlled, when the exposure distance of the polishing disc 1 on the workpiece is increased, the elasticity of the spring module close to the central area of the workpiece is gradually increased, the elasticity of the spring module close to the edge area of the workpiece is gradually decreased, the polishing stress in the middle area of the workpiece is increased, so that the removal amount of the middle area and the removal amount of the edge area of the workpiece are consistent, a reverse stress compensation effect is achieved, and the generation of an edge effect is reduced.

The gravity center adjusting mechanism 5 of the present invention can be installed with one (as shown in fig. 1) or multiple (as shown in fig. 2). When one gravity center adjusting mechanism 5 is installed, the gravity center adjusting mechanism 5 can well respond to the change of the telescopic motor 51, the influence of inconsistent response speeds of a plurality of gravity center adjusting mechanisms 5 is avoided, but only one action point of elasticity easily causes stress concentration at the action point and the stress distribution on the surface of a workpiece cannot be well improved. When a plurality of gravity center adjusting mechanisms 5 are installed, stress distribution on the surface of a workpiece can be improved by applying force to multiple points of the polishing disk 1, but the pure mechanical mechanism cannot ensure that the response speed of each gravity center adjusting mechanism 5 is consistent, so that the stress distribution is uneven due to inconsistent elastic force, and the influence of the factor is reduced due to high-speed rotation of the polishing disk 1. Therefore, preferably, the number of the gravity center adjusting mechanisms 5 is three, and the gravity center adjusting mechanisms are uniformly arranged on the same circumference.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that all changes and modifications made according to the claims and the specification of the present invention should fall within the scope covered by the present invention.

Claims

1. The utility model provides an adjustable focus burnishing device of spring which characterized in that: comprises a polishing disk (1), a power main shaft (2), a main shaft motor (3), a bracket (4) and a gravity center adjusting mechanism (5); the polishing disk (1) is connected with the lower end of the power main shaft (2), and the polishing disk and the power main shaft are flexibly connected; the top of the power main shaft (2) is connected with a main shaft motor (3); the gravity center adjusting mechanism (5) comprises a telescopic motor (51), a sleeve (52), a spring (53) and a universal ball bearing (54); a motor shaft (511) of the telescopic motor is fixedly connected with the upper part of the sleeve (52); the spring (53) is mounted in the sleeve (52); the upper part of the universal ball bearing (54) extends into the sleeve (52) from a through hole (521) arranged below the sleeve, and is linked with the spring (53), and the bottom of the universal ball bearing (54) can be pressed on the top surface of the polishing disk (1); the spindle motor (3) and the telescopic motor (51) are arranged on the bracket (4).

2. The spring type adjustable center of gravity polishing device according to claim 1, characterized in that: the flexible connection structure between the polishing disk (1) and the power spindle (2) is as follows: the polishing disc is characterized in that a pair of cylindrical bumps (21) are arranged at the bottom of the power main shaft (2), a mounting hole (11) is formed in the polishing disc (1), a straight groove (12) is formed in the mounting hole, and the cylindrical bumps (21) are matched with the straight groove (12) in a clamping manner to form flexible connection.

3. The spring type adjustable center of gravity polishing device according to claim 1, characterized in that: the sleeve (52) is composed of a cylindrical body (522) with a closed bottom and an end cover (523) which is covered on the cylindrical body (522).

4. The spring type adjustable center of gravity polishing device according to claim 1, characterized in that: the top of the universal ball bearing (54) is provided with a screw rod (541), the inside of the sleeve (52) is provided with a nut (542), and the screw rod (541) extends into the sleeve (52) from the through hole (521) and then is locked with the nut (542).

5. The spring type adjustable center of gravity polishing device according to claim 1, characterized in that: the bottom of the polishing disc (1) is provided with a polishing pad (13).

6. The spring type adjustable center of gravity polishing device according to claim 5, wherein: the polishing pad (13) is made of polyurethane or damping cloth material.

7. The spring type adjustable center of gravity polishing device according to claim 1, characterized in that: the support (4) comprises a motor support plate (41) and a motor base (42), the motor base is arranged on the motor support plate (41), and the spindle motor (3) is arranged on the motor base (42); the telescopic motor (51) is arranged on the motor supporting plate (41).

8. The spring type adjustable center of gravity polishing device according to any one of claims 1 to 7, characterized in that: one, two or more gravity center adjusting mechanisms (5) are arranged.

9. The spring type adjustable center of gravity polishing device according to any one of claims 1 to 7, characterized in that: the gravity center adjusting mechanism (5) is provided with a plurality of gravity center adjusting mechanisms which are uniformly distributed on the same circumference.