CN210046430U

CN210046430U - Passive stress disc polishing device

Info

Publication number: CN210046430U
Application number: CN201920776779.4U
Authority: CN
Inventors: 汤家凤; 段正路; 樊碧璇
Original assignee: Jiangxi Normal University
Current assignee: Jiangxi Normal University
Priority date: 2019-05-28
Filing date: 2019-05-28
Publication date: 2020-02-11
Anticipated expiration: 2029-05-28

Abstract

The utility model provides a passive stress disc polishing device, which comprises a central shaft, a chassis, a fixed bracket and a plurality of automatic pressure adjusting columns, wherein the bottom end of the central shaft is movably connected with the chassis, the fixed bracket is fixedly connected with the central shaft, and the automatic pressure adjusting columns are arranged on the fixed bracket; the automatic pressure adjusting column comprises an outer sleeve, a ball, an upright post, a spring, an adjusting screw and a limiting ring, wherein the limiting ring is arranged at the bottom of the outer sleeve, the ball, the upright post, the spring and the adjusting screw are sequentially arranged in the outer sleeve, the ball is limited in the limiting ring and can move when stressed, the bottom of the ball is in contact with the base plate, and the adjusting screw is in threaded connection with the top of the outer sleeve. Different with initiative stress disk technique, the utility model discloses a passive stress disk burnishing device realizes the aspheric surface polishing through the pressure of spring automatically regulated polishing quotation each point in different positions department in the pressure automatically regulated post.

Description

Passive stress disc polishing device

Technical Field

The utility model relates to an aspheric surface burnishing device, concretely relates to passive stress dish burnishing device.

Background

Currently, the aspheric polishing technique is mainly performed by using an active stress disc and other techniques. The active stress disc polishing technology needs a computer to detect and feedback control the pressure of each point of the polishing disc at different positions, and the cost is too high. The common polishing disk cannot control the pressure change condition of each part during polishing, so that the aspheric surface is difficult to obtain by a machine polishing mode. The pressure change of the pure manual control polishing disk is too time-consuming and labor-consuming, so that the prior aspheric surface polishing technology is difficult to popularize all the time.

Disclosure of Invention

In order to realize the quick polishing aspheric surface of machine, the utility model provides a passive stress dish burnishing device.

The utility model discloses a passive stress disc polishing device, which comprises a central shaft, a chassis, a fixed support and a plurality of automatic pressure adjusting columns, wherein the bottom end of the central shaft is movably connected with the chassis, the fixed support is fixedly connected with the central shaft, and the automatic pressure adjusting columns are arranged on the fixed support; the automatic pressure adjusting column comprises an outer sleeve, a ball, an upright post, a spring, an adjusting screw and a limiting ring, wherein the limiting ring is arranged at the bottom of the outer sleeve, the ball, the upright post, the spring and the adjusting screw are sequentially arranged in the outer sleeve, the ball is limited in the limiting ring and can move when stressed, the bottom of the ball is in contact with the base plate, and the adjusting screw is in threaded connection with the top of the outer sleeve. When the grinding wheel is used, the bottom of the chassis is used for grinding a part to be polished; when the to-be-polished piece rotates, the to-be-polished piece drives the chassis to rotate around the central shaft, and when the chassis rotates, a grinding acting force is generated on the to-be-polished piece; because the pressure automatic adjusting columns are distributed on the chassis, the springs in the pressure automatic adjusting columns are forced to stretch and contract by the height change of the chassis, so that the transverse position of the pressure automatic adjusting columns can be sensed by the height change, and a force related to the position is applied; the force changes the grinding acting force of the chassis on the part to be polished, the closer to the edge of the part to be polished, the larger the closer to the center, the smaller the grinding amount at the edge is, and the larger the grinding amount at the center is, so that the aspheric surface polishing is realized.

Preferably, the bottom end of the central shaft is movably connected with the chassis through a universal joint.

More preferably, the universal joint comprises a ball head and a ball socket, the ball socket is arranged on the chassis, and the ball head is arranged at the bottom end of the central shaft. The universal connection between the central shaft and the chassis can be realized by placing the ball head in the ball socket.

Preferably, the number of the automatic pressure adjusting columns can be four, eight or twelve. The automatic pressure adjusting columns are uniformly distributed around the circumference, and theoretically, the effect of the automatic pressure adjusting columns is optimal when the base plate is fully distributed.

Preferably, the material of the ball is steel.

The utility model has the advantages that: different from the active stress disc technology, the passive stress disc polishing device of the utility model automatically adjusts the pressure of each point of the polishing disc surface at different positions through the spring in the pressure automatic adjusting column to realize aspheric surface polishing; the variable pressure at different positions of the stress disc is automatically loaded, and the pressure is not required to be controlled by a computer through position detection.

Drawings

Fig. 1 is a schematic structural view of a passive stress disc polishing apparatus according to the present invention.

Fig. 2 is a schematic sectional view of the automatic pressure adjusting column of the present invention.

Fig. 3 is a schematic view of the polishing principle of the passive stress disc polishing apparatus of the present invention.

The reference signs explain: 100. the automatic pressure regulating device comprises a central shaft, 200 parts of a fixed support, 300 parts of an automatic pressure regulating column, 301 parts of a regulating screw, 302 parts of an outer sleeve, 303 parts of a spring, 304 parts of an upright column, 305 parts of a ball, 306 parts of a limiting ring and 400 parts of a chassis.

Detailed Description

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

As shown in fig. 1, the present invention relates to a passive stress disc polishing apparatus, which comprises a central shaft 100, a fixing bracket 200, a plurality of pressure automatic adjusting columns 300 and a chassis 400. The base plate 400 may be a polishing plate commonly known in the art, and has a central hole on its top surface, a ball socket is disposed in the central hole, and a ball head is disposed at the bottom end of the central shaft 100 and inserted into the ball socket, so that the base plate 400 can freely rotate around the central shaft 100. In the embodiment, the ball head and the ball socket form a universal joint; in other embodiments, other forms of universal joints may be employed. The fixed bracket 200 is a circular piece with the diameter equal to that of the chassis 400, a central hole matched with the central shaft 100 is formed in the fixed bracket, and the fixed bracket is sleeved on the central shaft 100 through the central hole; and mounting holes matched with the automatic pressure adjusting columns 300 are further formed in the base, the automatic pressure adjusting columns 300 are inserted into the mounting holes, and each mounting hole corresponds to one automatic pressure adjusting column 300. In fig. 1, nine pressure self-adjusting columns 300 are shown, which are evenly distributed on the fixed bracket 200.

As shown in FIG. 2, the pressure self-adjusting post 300 includes an outer sleeve 302, a ball 305, a post 304, a spring 303, an adjustment screw 301, and a stop collar 306. The outer sleeve 302 is hollow, the limiting ring 306 is arranged at the bottom of the outer sleeve 302, and the ball 305, the upright 304, the spring 303 and the adjusting screw 301 are sequentially arranged in the outer sleeve 302 from bottom to top. The balls 305 are steel balls and are restrained on the retainer ring 306, and the bottom of the balls 305 extends out of the retainer ring 306, and the extended part is in contact with the top of the chassis 400. When pressed by the chassis 400, the ball 305 can move upwards, thereby pushing the upright 304 and forcing the spring 303 to contract. An adjusting screw 301 is threadedly coupled to the top of the outer sleeve 302, and the initial degree of extension and retraction of the spring 303 can be adjusted by rotating the adjusting screw 301.

Unlike the active stress disk technology, the passive stress disk polishing apparatus suffers from passive stress variations in which the pressure at each point varies with position. Fig. 3 shows the working principle of the passive stress disc polishing device, the periphery of the passive stress disc is distributed with pressure automatic adjusting columns, and the pressure automatic adjusting columns can sense the transverse position of the passive stress disc through height change so as to apply a force related to the position. Therefore, the pressure regulating columns at the edges of the aspheric surface to be polished (the member to be polished) exert a larger force on the polishing pad at the bottom, while a small force is exerted at the center. Therefore, when the aspheric surface to be polished rotates, the polishing base plate is driven to rotate, and the polishing plate has a grinding acting force on the aspheric surface to be polished when rotating, the acting force is larger closer to the edge of the piece to be polished and smaller closer to the center, so that the grinding amount at the edge is larger than that at the center, and the polishing of the aspheric surface is realized. The variable pressure at different positions of the stress disc is automatically loaded, and the pressure is not required to be controlled by a computer through position detection.

The above is the preferred embodiment of the present invention, but the embodiment of the present invention is not limited by the above, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and all are included in the scope of the present invention.

Claims

1. A passive stress disc polishing device is characterized in that: the automatic pressure regulating device comprises a central shaft, a chassis, a fixed support and a plurality of automatic pressure regulating columns, wherein the bottom end of the central shaft is movably connected with the chassis, the fixed support is fixedly connected with the central shaft, and the plurality of automatic pressure regulating columns are arranged on the fixed support; the automatic pressure adjusting column comprises an outer sleeve, a ball, an upright post, a spring, an adjusting screw and a limiting ring, wherein the limiting ring is arranged at the bottom of the outer sleeve, the ball, the upright post, the spring and the adjusting screw are sequentially arranged in the outer sleeve, the ball is limited in the limiting ring and can move when stressed, the bottom of the ball is in contact with the base plate, and the adjusting screw is in threaded connection with the top of the outer sleeve.

2. A passive stress disc polishing apparatus according to claim 1, wherein: the bottom end of the central shaft is movably connected with the chassis through a universal joint.

3. A passive stress disc polishing apparatus according to claim 2, wherein: the universal joint comprises a ball head and a ball socket, the ball socket is arranged on the chassis, and the ball head is arranged at the bottom end of the central shaft.

4. A passive stress disc polishing apparatus according to claim 1, wherein: the number of the automatic pressure adjusting columns is four, eight or twelve.

5. A passive stress disc polishing apparatus according to claim 1, wherein: the material of the ball is steel.