CN111230720A

CN111230720A - Magnetorheological polishing knife

Info

Publication number: CN111230720A
Application number: CN202010278532.7A
Authority: CN
Inventors: 毕成; 王鸿云; 张莉
Original assignee: Taizhou University
Current assignee: Taizhou University
Priority date: 2020-04-07
Filing date: 2020-04-07
Publication date: 2020-06-05
Anticipated expiration: 2040-04-07
Also published as: CN111230720B

Abstract

The invention discloses a magnetorheological polishing knife which comprises a tube body, magnetorheological polishing liquid, a polishing head and a polishing ball, wherein the polishing head and the polishing ball are both magnetic, the tube body is provided with a containing hole and a placing hole which are communicated along an axis, the magnetorheological polishing liquid is arranged in the containing hole and the placing hole, the top of the containing hole is communicated with the outside, the top end of the containing hole is provided with a pressurizing device, the polishing head is fixed at the bottom of the tube body, a lower placing cavity is formed in the polishing head, the bottom of the lower placing cavity is communicated with the outside, the lower part of the tube body is provided with an upper placing cavity, the upper placing cavity is communicated with the placing hole, the upper placing cavity and the lower placing cavity form a containing cavity, the polishing ball is arranged in the containing cavity and can rotate freely. The invention has the advantages that: the polishing precision of the magnetorheological polishing solution is finer and smoother compared with the traditional material, the whole polishing radius can be smaller, and the magnetorheological polishing solution is suitable for complex environments.

Description

Magnetorheological polishing knife

Technical Field

The invention relates to a magnetorheological polishing knife.

Background

When some elements with higher precision requirements and complex surfaces need to be polished, the existing polishing tool cannot meet the requirements by using polishing media such as sponge sand and the like, and when the polishing surface is small or complex, the size of the polishing media attached to the base is limited, so that a small area cannot be deeply polished.

Disclosure of Invention

The invention aims to provide a magnetorheological polishing knife which can effectively solve the problem that the polishing precision of the existing polishing knife is not enough.

In order to solve the technical problems, the invention is realized by the following technical scheme: a magneto-rheological polishing knife comprises a tube body, magneto-rheological polishing liquid, polishing heads and polishing balls, wherein the polishing heads and the polishing balls are magnetic, the tube body is provided with a containing hole and a placing hole which are communicated along an axis, the magneto-rheological polishing liquid is arranged in the containing hole and the placing hole, the top of the containing hole is communicated with the outside, the top end of the containing hole is provided with a pressurizing device, the polishing heads are fixed at the bottom of the tube body, a lower placing cavity is formed in the polishing heads, the bottom of the lower placing cavity is communicated with the outside, an upper placing cavity is formed in the lower part of the tube body and is communicated with the placing hole, the upper placing cavity and the lower placing cavity form a containing cavity, the polishing balls are arranged in the containing cavity and can rotate freely, the inner diameter of the placing hole is larger than that of the containing hole, a switch spring is arranged in the placing hole, and one end, the other end of the switch spring is abutted against the polishing ball, when the polishing ball is not subjected to external force towards the pipe body, the polishing ball is in close contact with the polishing head, and when the polishing ball is subjected to external force towards the pipe body, a gap is reserved between the polishing ball and the lower placing cavity.

Preferably, the pressurizing device comprises a sealing head, a thrust spring and a piston, the sealing head is fixed at the top of the pipe body to close the accommodating hole, the piston is matched with the accommodating hole and is arranged in the accommodating hole in a sliding manner, and the thrust spring is arranged in the accommodating hole between the piston and the sealing head; the magnetorheological polishing fluid is fixed through the end socket, the piston is pushed by the thrust spring, the magnetorheological polishing fluid is extruded towards the direction of the polishing ball, and sufficient pressure is provided to discharge the magnetorheological polishing fluid for polishing operation.

Preferably, the inner wall of the upper placing cavity is provided with at least one flow guide groove, the upper placing cavity is also required to control the polishing balls not to move, and the gap between the upper placing cavity and the polishing balls cannot be too large, so that only the magnetorheological polishing liquid provided with the flow guide grooves as much as possible flows to a specified position to prepare for polishing operation.

Preferably, the upper placing cavity and/or the lower placing cavity are/is provided with a liquid storage cavity, and the liquid storage cavity is formed, so that more magnetorheological polishing liquid is stored at the position to be brought into a working position along with the polishing ball.

Preferably, the polishing head and the pipe body are connected through threads, and the polishing head and the pipe body are convenient to disassemble and overhaul through threaded connection.

Compared with the prior art, the invention has the advantages that: the polishing precision of the magnetorheological polishing solution is finer and smoother compared with the traditional material, the magnetorheological polishing solution attached to the magnetic polishing ball can be converted into a solid-like form to polish the surface of a workpiece through the magnetic polishing ball, and other adhesives are not needed for attaching the magnetorheological polishing solution to the polishing ball, so that the whole polishing radius can be smaller, the magnetorheological polishing solution is suitable for a complex environment, the pressure applied to the polishing ball through a switch spring can control the contact between the polishing ball and the polishing head, the magnetorheological polishing solution cannot flow out when the magnetorheological polishing solution is not used, and the use of the polishing solution is saved.

Drawings

FIG. 1 is a schematic view of a magnetorheological finishing tool according to the present invention;

FIG. 2 is a schematic structural view of a polishing ball in a working state;

FIG. 3 is a schematic structural view of a polishing ball in a non-operating state;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 5 is a cross-sectional view taken along line B-B of FIG. 1;

FIG. 6 is a schematic view showing the structure of the connection between the tube and the polishing head according to the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be considered as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1 to 6, an embodiment of a magnetorheological polishing knife according to the present invention is a magnetorheological polishing knife, including a tube 21, magnetorheological polishing liquid 4, a polishing head 11, and a polishing ball 3, where the polishing head and the polishing ball 3 are both magnetic, the tube 21 is provided with a receiving hole 2 and a placing hole 1 along an axis, the magnetorheological polishing liquid 4 is disposed in the receiving hole 2 and the placing hole 1, the top of the receiving hole 2 is communicated with the outside, the top end of the receiving hole 2 is provided with a pressurizing device, the polishing head 11 is fixed at the bottom of the tube 21, a lower placing cavity 5 is formed in the polishing head 11, the bottom of the lower placing cavity 5 is communicated with the outside, the lower portion of the tube 21 is provided with an upper placing cavity 10, the upper placing cavity 10 is communicated with the placing hole 1, the upper placing cavity 10 and the lower placing cavity 5 form a containing cavity, the polishing ball 3 is disposed in the containing cavity and can rotate freely, the internal diameter of placing hole 1 is greater than the internal diameter of accommodation hole 2, be equipped with switch spring 9 in placing hole 1, switch spring 9 one end top is at the top of placing hole 1, and switch spring 9's the other end top is on polishing ball 3, and when polishing ball 3 was in non-operating condition, polishing ball 3 did not receive when orientation body 21 external force promptly, polishing ball 3 and polishing head 11 in close contact with, when polishing ball 3 was in operating condition, when polishing ball 3 received the external force of orientation body 21 promptly, polishing ball 3 and lower chamber of placing left the clearance, let magnetic current becomes polishing solution 4 can flow out and attach to on polishing ball 3.

The polishing precision of the magnetorheological polishing solution 4 is finer and smoother compared with the traditional material, the magnetorheological polishing solution 4 attached to the magnetic polishing ball 3 can be converted into a solid-like form to polish the surface of the workpiece 100, and the magnetorheological polishing solution 4 is attached to the polishing ball 3 without other adhesives, so that the whole polishing radius can be smaller, the magnetorheological polishing solution is suitable for complex environments, the contact between the polishing ball 3 and the polishing head 11 can be controlled by the pressure exerted on the polishing ball 3 by the switch spring 9, the magnetorheological polishing solution 4 cannot flow out when the magnetorheological polishing solution is not used, and the use of the polishing solution is saved.

In order to provide sufficient pressure for the magnetorheological polishing fluid 4 in the accommodating hole 2, the pressurizing device comprises a sealing head 8, a thrust spring 7 and a piston 6, wherein the sealing head 8 is fixed at the top of the pipe body 21 to seal the accommodating hole 2, the piston 6 is matched with the accommodating hole 2 and is arranged in the accommodating hole 2 in a sliding mode, and the thrust spring 7 is arranged in the accommodating hole 2 between the piston 6 and the sealing head 8.

The inner wall of the upper placing cavity 10 is provided with at least one flow guide groove 23, and generally, as shown in fig. 4, eight flow guide grooves 23 are uniformly formed to flow the magnetorheological polishing solution 4 back. A liquid storage cavity 22 can be formed in the placing cavity and/or the lower placing cavity 5 at the joint of the pipe body 21 and the polishing head 11, the liquid storage cavity 22 is communicated with the diversion grooves 23, the liquid storage cavity 22 can be independently and singly arranged, preferably in an annular shape and is communicated with all the diversion grooves 23, and therefore the function of liquid storage can be fully exerted, the magnetorheological polishing liquid 4 is accumulated at the position and flows out under the working condition better. The upper placing cavity 10 is a spherical cambered surface, and the radius of the cambered surface can be different from that of the polishing ball 3, so that gaps can be reserved for the magnetorheological polishing liquid 4 to flow down; the lower placing cavity 5 is also a spherical cambered surface, can be consistent with the radius of the polishing ball 3, and also can be inconsistent with the radius, if the radius is inconsistent, the polishing ball 3 is ensured to be in contact with the cambered surface of the lower placing cavity 5 in a non-working state to form line sealing.

The polishing head 11 is generally connected with the tube body 21 through threads, internal threads are formed on the polishing head 11, and external threads are formed at the bottom of the tube body 21, so that the polishing head 11 and the tube body 21 can be conveniently machined, the polishing ball 3 can be conveniently placed, and the polishing ball 3 which is possibly worn can be replaced.

When the polishing device is used, as shown in fig. 2, after the polishing knife contacts with a workpiece 100 to be polished, the polishing ball 3 moves upwards after receiving contact pressure, at the moment, a gap is formed between the polishing ball 3 and the lower placing cavity 5 of the polishing head 11, and the gap can enable the magnetorheological polishing liquid 4 which is changed into a solid-like state under the action of a magnetic field to be attached to the polishing ball 3 and be taken out, so that the surface of the workpiece 100 is polished; as shown in fig. 3, after polishing is completed, the polishing blade is lifted, and due to the loss of the acting force between the polishing blade and the workpiece 100, the polishing ball 3 is in close contact with the bottom of the lower placing cavity 5 under the action of the switch spring 9, so that the magnetorheological polishing liquid 4 is prevented from flowing out again, and the use of the magnetorheological polishing liquid 4 is saved. The device is used for finely polishing the surface of the workpiece 100, has higher polishing precision and smaller polishing radius, and can polish more complex surfaces.

The above description is only an embodiment of the present invention, but the technical features of the present invention are not limited thereto, and any changes or modifications within the technical field of the present invention by those skilled in the art are covered by the claims of the present invention.

Claims

1. A magnetorheological finishing knife is characterized in that: including body (21), magnetic current becomes polishing solution (4), polishing head (11) and polishing ball (3), polishing head and polishing ball (3) all have magnetism, body (21) are equipped with communicating accommodation hole (2) and place hole (1) along the axis, magnetic current becomes polishing solution (4) and sets up in accommodation hole (2) and place hole (1), the top of accommodation hole (2) communicates with each other with the external world, the top of accommodation hole (2) is equipped with pressure device, polishing head (11) are fixed in body (21) bottom, it places chamber (5) down to have seted up in polishing head (11), it communicates with each other with the external world to place chamber (5) bottom down, the lower part of body (21) is opened and is placed chamber (10) on, it communicates with each other with placing hole (1) to place chamber (10) on, on place chamber (10) and place chamber (5) down and constitute and hold the chamber, polishing ball (3) set up and just can the free rotation holding the intracavity, the internal diameter of placing hole (1) is greater than the internal diameter of holding hole (2), be equipped with switch spring (9) in placing hole (1), switch spring (9) one end top is at the top of placing hole (1), and the other end top of switch spring (9) is on polishing ball (3), and when polishing ball (3) were in non-operating condition, polishing ball (3) and rubbing head (11) in close contact with, when polishing ball (3) were in operating condition, polishing ball (3) and down were placed and leave the clearance between the chamber.

2. The magnetorheological finishing tool according to claim 1, wherein: the pressurizing device comprises a seal head (8), a thrust spring (7) and a piston (6), wherein the seal head (8) is fixed at the top of a pipe body (21) to seal a containing hole (2), the piston (6) is matched with the containing hole (2) and is arranged in the containing hole (2) in a sliding mode, and the thrust spring (7) is arranged in the containing hole (2) between the piston (6) and the seal head (8).

3. The magnetorheological finishing tool according to claim 1, wherein: the inner wall of the upper placing cavity (10) is provided with at least one flow guide groove (23).

4. The magnetorheological finishing tool according to claim 1, wherein: the upper placing cavity (10) and/or the lower placing cavity (5) are/is provided with a liquid storage cavity (22).

5. The magnetorheological finishing tool according to claim 1, wherein: the polishing head (11) is connected with the pipe body (21) through threads.