CN109605186B

CN109605186B - Sphere polishing machine

Info

Publication number: CN109605186B
Application number: CN201811470707.3A
Authority: CN
Inventors: 彭云峰; 曾鑫龙; 郭隐彪; 许乔
Original assignee: Xiamen University; Shenzhen Research Institute of Xiamen University
Current assignee: Xiamen University; Shenzhen Research Institute of Xiamen University
Priority date: 2018-12-04
Filing date: 2018-12-04
Publication date: 2022-03-15
Anticipated expiration: 2038-12-04
Also published as: CN109605186A

Abstract

The invention relates to a sphere polishing machine, comprising: a machine table and a ball polishing device; the ball polishing device is used for polishing the ball while driving the ball to rotate in all directions; characterized in that, the sphere polishing machine further comprises: an interference member, a first drive mechanism; the first driving mechanism is used for driving the interference piece to contact and be far away from the surface of the sphere according to a preset frequency when the sphere rotates in all directions. The invention adopts the motor to drive the involute cam to stir the ball body which rotates in all directions at intervals, thereby increasing the complexity of the movement of the ball body, ensuring that the processed surface lines of the ball body are more irregular, reducing the intermediate frequency error and improving the surface precision.

Description

Sphere polishing machine

Technical Field

The invention relates to a polishing machine, in particular to a sphere polishing machine.

Background

In precise measuring instruments and aerospace industry, high-precision spheres are often used, some precision requirements are below 0.025 mu m, and most of the high-precision spheres are key parts and play a decisive role in equipment reliability and service life, so that the method has great practical significance for the research of the precision machining method of the spheres.

At present, among a plurality of machining technologies for high-precision spheres, the more prominent technology is plane grinding and grinding machining of V-shaped grooves, but the two technologies are mainly used for machining spheres with smaller diameters, and among the plurality of machining technologies, a machining method of a four-shaft sphere grinding machine is mostly applied at lower cost. Chinese patent application publication CN108000342A discloses a sphere polishing device, which utilizes four motors to drive four polishing heads to polish the surface of a large-diameter sphere, and the prior art described above has a single and regular motion when a grinding tool drives a workpiece to rotate and polish in grinding, and is prone to generate a medium frequency error, which affects the processing precision of the surface of the sphere.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a sphere polishing machine, which can increase the complexity of the omnibearing motion of a sphere, ensure that the texture of the processed surface of the sphere is more irregular in the polishing process of the sphere, reduce the intermediate frequency error and improve the surface precision.

In order to solve the above technical problems, the present invention provides a sphere polishing machine, comprising: a machine table and a ball polishing device; the ball polishing device is used for polishing the ball while driving the ball to rotate in all directions; characterized in that, the sphere polishing machine further comprises: an interference member, a first drive mechanism; the first driving mechanism is used for driving the interference piece to contact and be far away from the surface of the sphere according to a preset frequency when the sphere rotates in all directions.

Preferably, the ball polishing apparatus comprises: the polishing solution supply mechanism is provided with a liquid conveying pipeline and is arranged on the upper side of the ball body for pouring polishing solution to the surface of the ball body through the liquid conveying pipeline; the grinding wheel mechanism is used for grinding the surface of the ball; the grinding and polishing mechanism is used for polishing the ball together with the grinding wheel mechanism; and the second driving mechanisms are used for driving the spheres to rotate.

Preferably, the machine comprises: the base is provided with three mounting inclined blocks at intervals in the circumferential direction, and the inclination angle of each mounting inclined block ranges from 20 degrees to 45 degrees; one end of the connecting piece is connected to the base along the vertical direction; and the mounting plate is connected to the other end of the connecting piece and extends towards the middle part of the base along the horizontal direction.

Preferably, the first driving mechanism is a first driving motor, the first driving motor is arranged on the base along a vertical direction, and an output shaft of the first driving motor faces upwards; the interference piece is connected to the output shaft and used for shifting the ball body at intervals under the driving of the first driving motor.

Preferably, the grinding wheel mechanism is disposed on the mounting plate, and the grinding wheel mechanism includes: the cup-shaped grinding wheel is provided with a downward opening; one end of the first connecting screw rod is connected with the cup-shaped grinding wheel, the other end of the first connecting screw rod penetrates through the mounting plate, and an adjusting nut for adjusting the height of the cup-shaped grinding wheel is sleeved on the first connecting screw rod; and the elastic pressure spring is arranged between the cup-shaped grinding wheel and the mounting plate and is used for generating pretightening force for the cup-shaped grinding wheel.

Preferably, the polishing mechanism comprises: a polishing motor arranged on one of the mounting inclined blocks; the bottom of the first driving head is connected with a second connecting screw rod; the second connecting screw is connected to an output shaft of the grinding and polishing motor in a threaded connection mode, and the axial displacement feed of the first driving head is adjusted through a nut; and the grinding and polishing head is connected to the upper surface of the first driving head and synchronously rotates under the driving of a grinding and polishing motor through the first driving head.

Preferably, the number of the second driving mechanisms is 2, and the second driving mechanisms are respectively arranged on the installation inclined blocks in a one-to-one correspondence manner, and each second driving mechanism includes: a second drive motor; the bottom of the second driving head is connected with a third connecting screw rod; the third connecting screw is connected to an output shaft of the grinding and polishing motor in a threaded connection mode, and the axial displacement feed of the second driving head is adjusted through a nut; the wear pad, the wear pad is connected in the upper surface of second drive head, the upper surface of wear pad is connected with a plurality of slots that extend to the center from circumference, the wear pad passes through the second drive head synchronous rotation under second driving motor's drive.

Preferably, the axis of the output shaft of the polishing motor and the axes of the two second driving motors are perpendicular to each other in space, so that the ball can rotate in all directions in space.

Preferably, the interference piece is of an involute cam, a cross or a meter-shaped structure.

By adopting the technical scheme, the invention can obtain the following technical effects: under the condition that the interference piece and the first driving mechanism are not arranged, the track of the omnibearing rotation of the sphere is regular, and the grains on the surface of the polished sphere are regular; this scheme is through setting up interference piece and a actuating mechanism to make a actuating mechanism can drive in the all-round pivoted of spheroid and do to relate to with predetermined frequency contact spheroid surface, increased the complexity of spheroid motion, make spheroid processing surface line more irregular, reduce intermediate frequency error, improve the surface accuracy.

Drawings

The invention is described in further detail below with reference to the following figures and detailed description:

FIG. 1 is a schematic view of the present invention in a loaded state;

FIG. 2 is a top view of the present invention in a loaded condition;

FIG. 3 is a schematic view of the other side of the present invention in a state of loading the ball

FIG. 4 is a schematic structural view of the present invention;

FIG. 5 is a schematic view of the structure of the cup wheel;

FIG. 6 is an exploded view of the second drive mechanism;

FIG. 7 is an exploded view of the polishing mechanism;

fig. 8 is a schematic structural view of the wear pad.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.

Referring to fig. 1 to 4, the present embodiment provides a sphere polishing machine, including: a machine table 1 and a sphere polishing device 2; the ball polishing device 2 is used for polishing the ball while driving the ball to rotate in all directions; the sphere polishing machine further comprises: an interference member 6A, a first drive mechanism 6B; the first driving mechanism 6B is used for driving the interference piece 6A to contact and separate from the surface of the sphere according to a preset frequency when the sphere rotates in all directions. The interference piece 6A may be an involute cam, or may have a cross-shaped or m-shaped structure, and is preferably an involute cam. The interference piece with the cross structure sequentially contacts with the surface of the ball body by turns at four corners when rotating. Correspondingly, the interference piece of the structure shaped like a Chinese character 'mi' rotates to contact the surface of the ball body in turn at eight corners. Further, the ball polishing apparatus 2 includes: a polishing liquid supply mechanism (not shown), a grinding wheel mechanism 3, a polishing mechanism 4, and a plurality of second drive mechanisms 5. The polishing solution supply mechanism is arranged on the upper side of the ball body and is used for pouring polishing solution to the surface of the ball body; the grinding wheel mechanism 3 is used for grinding the surface of the sphere; the grinding and polishing mechanism 4 is used for polishing the ball together with the grinding wheel mechanism 3; the second driving mechanisms 5 are used for driving the spheres to rotate. Specifically, the ball is accommodated in the ball polishing device 2, the second driving mechanism 5 drives the ball to rotate in all directions with the grinding and polishing mechanism 4, the grinding and polishing mechanism 4 drives the ball to rotate in all directions and simultaneously polishes the surface of the ball together with the grinding wheel mechanism 3, and the first driving mechanism 6B drives the involute cam to stir the ball at intervals, so that the complexity of movement of the ball is increased, the lines of the processed surface of the ball are more irregular, the intermediate frequency error is reduced, and the surface precision is improved. When the ball is polished, polishing liquid is poured onto the surface of the ball from the upper part of the ball, so that a layer of oil film is formed on the surface of the ball, and the ball is suspended on the surface of the oil film instead of being directly contacted with the grinding wheel mechanism 3, the second driving mechanism 5 and the involute cam grinding mechanism, so that the defects of a processing deterioration layer, micro cracks and the like left on the surface of the ball in the polishing process can be effectively avoided, and the processing quality and the processing precision of the ball can be further improved.

Further, as shown in fig. 1, the machine 1 includes: a base 1A, a connecting piece 1B and a mounting plate 1C. The base 1A is divided into three installation inclined blocks 1A1 at intervals in the circumferential direction, and the inclination angle of the installation inclined blocks 1A1 ranges from 20 degrees to 45 degrees, and is preferably 35 degrees. One end of the connecting piece 1B is connected to the base 1A along the vertical direction. The mounting plate 1C is connected to the other end of the connecting member 1B and extends in the horizontal direction toward the middle of the base 1A. The first driving mechanism 6B is a first driving motor, the first driving motor is arranged on the base 1A along the vertical direction, and the output shaft direction of the first driving motor is upward; the involute cam is connected with the output shaft and is used for shifting the ball body at intervals under the driving of the first driving motor.

Further, as shown in fig. 1 and 5, the grinding wheel mechanism 3 is disposed on the mounting plate 1C, and the grinding wheel mechanism 3 includes: the cup-shaped grinding wheel 3A, the first connecting screw rod 3B and the elastic pressure spring 3C are arranged, and the opening of the cup-shaped grinding wheel 3A faces downwards. One end of the first connecting screw rod 3B is connected with the cup-shaped grinding wheel 3A, the other end of the first connecting screw rod passes through the mounting plate 1C, and an adjusting nut for adjusting the height of the cup-shaped grinding wheel 3A is sleeved on the first connecting screw rod 3B. The elastic pressure spring 3C is arranged between the cup-shaped grinding wheel 3A and the mounting plate 1C and used for generating pretightening force for the cup-shaped grinding wheel 3A. Specifically, the first connecting screw 3B is used to adjust the height of the cup wheel 3A. After the sphere enters the processing station, the elastic pressure spring 3C can be used for compressing and driving the grinding wheel to be attached to the appearance of the sphere, so that the contact between the sphere and the grinding wheel can be kept in real time, and the polishing work of the surface of the sphere can be completed under the help of the polishing solution.

Preferably, as shown in fig. 1, 3 and 4, the liquid supply pipe 2A of the polishing liquid supply mechanism may be inserted into the cup wheel 3A through the upper surface of the cup wheel 3A, so that the polishing liquid is introduced into the spherical surface.

Further, as shown in fig. 1 to 8, the polishing mechanism 4 includes: a polishing motor 4A, a first driving head 4B and a polishing head 4C, wherein the polishing motor 4A is arranged on one of the installation inclined blocks 1A 1; the bottom of the first driving head 4B is connected with a second connecting screw rod 4B 1; the second connecting screw rod 4B1 is connected to the output shaft of the grinding and polishing motor 4A in a threaded connection manner, and the axial displacement feed of the first driving head 4B is adjusted through a nut; the polishing head 4C is connected to the upper surface of the first driving head 4B, and the polishing head 4C is driven by the first driving head 4B to synchronously rotate by the polishing motor 4A. Preferably, the polishing head 4C may be a polishing pad. Further, the number of the second driving mechanisms 5 is 2, and the second driving mechanisms are respectively arranged on the installation inclined blocks 1a1 in a one-to-one correspondence manner, and each second driving mechanism includes: the bottom of the second driving head 5B is connected with a third connecting screw rod 5B 1; the third connecting screw 5B1 is connected to the output shaft of the lapping and polishing motor 4A in a threaded manner, and adjusts the axial displacement feed of the second driving head 5B by a nut. Wear pad 5C connects in second drive head 5B's upper surface, wear pad 5C upper surface has a plurality of grooves 5C1 that extend to the center from circumference, wear pad 5C passes through second drive head 5B synchronous rotation under second driving motor 5A's drive. Specifically, thereby adjust each axial of rotation of first drive head 4B and two second drive heads 5B through the combined action of screw rod and nut to reach the purpose of adjustment spheroid accommodation space, make the spheroid burnishing machine of this embodiment can polish the work to the spheroid of different diameters size. The wear-resistant pad 5C is provided with a plurality of grooves 5C1 extending from the circumferential direction to the center, so that the polishing liquid can enter the grooves 5C1, the surface of the wear-resistant pad 5C is continuously provided with the polishing liquid during processing, the service life of the wear-resistant pad 5C is further prolonged, the axis of the output shaft of the grinding and polishing motor 4A and the axes of the two second driving motors 5A are mutually vertical in space, and the ball body can rotate in all directions in space. The specific motor rotation corresponds to one rotation degree of freedom in space motion, namely three driving motions correspond to three rotation degrees of freedom in space, and the three motions are combined to drive the sphere to rotate in all directions in space.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A sphere polishing machine, comprising: a machine table (1) and a sphere polishing device (2); the ball polishing device (2) is used for polishing the ball while driving the ball to rotate in all directions; characterized in that, the sphere polishing machine further comprises: an interference member (6A), a first drive mechanism (6B); the first driving mechanism (6B) is used for driving the interference piece (6A) to contact and be far away from the surface of the sphere according to a preset frequency when the sphere rotates in all directions;

wherein, the machine (1) comprises:

the base (1A) is provided with three installation inclined blocks (1A1) at intervals in the circumferential direction, and the inclination angle of the installation inclined blocks (1A1) ranges from 20 degrees to 45 degrees;

one end of the connecting piece (1B) is connected to the base (1A) along the vertical direction;

the mounting plate (1C) is connected to the other end of the connecting piece (1B), and extends towards the middle of the base (1A) along the horizontal direction;

wherein the ball polishing device (2) comprises:

the polishing solution supply mechanism is provided with a liquid conveying pipeline (2A), and is arranged on the upper side of the ball body and used for pouring polishing solution to the surface of the ball body through the liquid conveying pipeline (2A);

a grinding wheel mechanism (3) for grinding the surface of the ball;

the grinding and polishing mechanism (4) is used for polishing the ball together with the grinding wheel mechanism (3);

and a second drive mechanism (5) for driving the ball to rotate;

wherein the polishing mechanism (4) comprises:

a polishing motor (4A) arranged on one of the installation inclined blocks (1A 1); the bottom of the first driving head (4B) is connected with a second connecting screw rod (4B 1); the second connecting screw rod (4B1) is connected to an output shaft of the grinding and polishing motor (4A) in a threaded connection mode, and the axial displacement feed of the first driving head (4B) is adjusted through a nut;

the grinding and polishing head (4C) is connected to the upper surface of the first driving head (4B), and the grinding and polishing head (4C) is driven by the first driving head (4B) to synchronously rotate by a grinding and polishing motor (4A);

wherein, second actuating mechanism (5) are 2, set up respectively on two other installation sloping blocks (1A1) one-to-one, second actuating mechanism (5) contain:

a second drive motor (5A);

the bottom of the second driving head (5B) is connected with a third connecting screw rod (5B 1); the third connecting screw rod (5B1) is connected to an output shaft of the second driving motor (5A) in a threaded connection mode, and the axial displacement feed of the second driving head (5B) is adjusted through a nut;

wear pad (5C), wear pad (5C) is connected in the upper surface of second drive head (5B), wear pad (5C) upper surface has a plurality of slot (5C1) that extend to the center from circumference, wear pad (5C) passes through second drive head (5B) is synchronous rotation under the drive of second driving motor (5A).

2. The sphere polishing machine according to claim 1, characterized in that said first driving mechanism (6B) is a first driving motor, which is disposed on said base (1A) in a vertical direction with its output shaft directed upward; the interference piece (6A) is connected to the output shaft and used for shifting the ball body at intervals under the driving of the first driving motor.

3. The sphere polishing machine according to claim 2, wherein said grinder mechanism (3) is provided on said mounting plate (1C), said grinder mechanism (3) comprising:

a cup wheel (3A), said cup wheel (3A) opening downwards;

one end of the first connecting screw rod (3B) is connected with the cup-shaped grinding wheel (3A), the other end of the first connecting screw rod (3B) penetrates through the mounting plate (1C), and an adjusting nut for adjusting the height of the cup-shaped grinding wheel (3A) is sleeved on the first connecting screw rod (3B);

the elastic pressure spring (3C) is arranged between the cup-shaped grinding wheel (3A) and the mounting plate (1C) and used for generating pretightening force for the cup-shaped grinding wheel (3A).

4. The sphere polishing machine according to claim 3, characterized in that the axis of the output shaft of the polishing motor (4A) and the axes of the two second driving motors (5A) are perpendicular to each other in space, so that the sphere can rotate in all directions in space.

5. The sphere polishing machine according to claim 4, characterized in that said interference piece (6A) is of involute cam, cross or mi-shaped configuration.