CN111604712A

CN111604712A - Polishing machine adopting magnetorheological polishing knife

Info

Publication number: CN111604712A
Application number: CN202010283162.6A
Authority: CN
Inventors: 王鸿云; 毕成; 吴继华
Original assignee: Taizhou University
Current assignee: Taizhou University
Priority date: 2020-04-07
Filing date: 2020-04-07
Publication date: 2020-09-01
Anticipated expiration: 2040-04-07
Also published as: CN111604712B

Abstract

The invention discloses a polishing machine adopting a magnetorheological polishing knife, wherein a workpiece fixing rotating mechanism is rotationally arranged on a rack, and the magnetorheological polishing knife is positioned above the workpiece fixing rotating mechanism; the polishing knife driving mechanism comprises a sliding rod, a sliding block, a rotating disk, a rocker and a push rod, one end of the sliding rod is fixed on the rack, the sliding block is arranged on the sliding rod in a sliding mode, the rotating disk is arranged at one end, close to the support, of the sliding rod, the rotating disk controls the sliding block to slide on the sliding rod through the rocker, the top end of the magnetorheological polishing knife is rotatably connected to one end, far away from the support, of the sliding rod, one end of the push rod is rotatably connected with the middle of the magnetorheological polishing knife, and. The invention has the advantages that: the rotary polishing machine has the advantages that the rotary polishing machine can quickly polish the inner concave wall of a rotary workpiece in all directions, polishing efficiency is greatly improved, the rotary disk control rocker drives the sliding block to slide, the driving push rod drives the magnetorheological polishing knife to reciprocate, the driving mode is simple and efficient, and the failure rate is low.

Description

Polishing machine adopting magnetorheological polishing knife

Technical Field

The invention relates to a polishing machine adopting a magnetorheological polishing knife.

Background

The existing polishing machine can only carry out simple polishing on a plane, the inner concave wall of a rotary workpiece is often polished incompletely, or a complex apparatus such as a machining center is required to be utilized, so that the machining cost is invisibly increased.

Disclosure of Invention

The invention aims to provide a polishing machine adopting a magnetorheological polishing knife, which can effectively solve the problem that the inner concave wall of the conventional rotary workpiece is not polished in place.

In order to solve the technical problems, the invention is realized by the following technical scheme: a polishing machine adopting a magneto-rheological polishing knife comprises a magneto-rheological polishing knife, a rack, a workpiece fixing and rotating mechanism and a polishing knife driving mechanism, wherein the workpiece fixing and rotating mechanism is rotatably arranged on the rack, and the magneto-rheological polishing knife is positioned above the workpiece fixing and rotating mechanism;

the polishing knife driving mechanism comprises a sliding rod, a sliding block, a rotating disk, a rocker and a push rod, one end of the sliding rod is fixed on the rack, the sliding block is arranged on the sliding rod in a sliding mode, the rotating disk is arranged at one end, close to the support, of the sliding rod, the rotating disk controls the sliding block to slide on the sliding rod through the rocker, the top end of the magnetorheological polishing knife is rotatably connected to one end, far away from the support, of the sliding rod, one end of the push rod is rotatably connected with the middle of the magnetorheological polishing knife, and the other end of the push rod is rotatably connected.

Preferably, the fixed rotary mechanism of work piece includes motor, ball, swivel work head and fixation clamp, the fixation clamp is fixed on swivel work head, be equipped with the annular rolling groove on the swivel work head, be equipped with the annular rolling groove down of circle in the frame, the ball is located the rolling groove and rolls the inslot down, the motor is fixed in the frame, the axle and the swivel work head of motor are connected, drive swivel work head and rotate. The rotary worktable which needs to be rotated is controlled by a motor to rotate, and the ball bearings support the rotary worktable and reduce the resistance during rotation, so that the stability of a workpiece is ensured during rotation, and the consistency of the polishing efficiency is ensured.

Preferably, the magnetorheological polishing knife comprises a knife tool clamping handle, an adjusting spring and a knife body, the top of the knife tool clamping handle is rotatably connected with one end, far away from the support, of the sliding rod, a clamping groove is formed in the bottom of the knife tool clamping handle, the top of the knife body is arranged in the clamping groove, the adjusting spring is located in the clamping groove, one end of the adjusting spring abuts against the top of the clamping groove, and the other end of the adjusting spring abuts against the top of the knife body. The cutter can be conveniently and rapidly replaced through the clamping groove of the cutter clamping handle, and the adjusting spring provides pressure for the cutter body, so that sufficient pressure is kept between the working part of the cutter body and a workpiece.

Preferably, the cutter body comprises a pipe body, magnetorheological polishing liquid, a polishing head and a polishing ball, the polishing head and the polishing ball are both magnetic, the pipe 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 polishing head is fixed at the bottom of the pipe body, a lower placing cavity is formed in the polishing head, the bottom of the lower placing cavity is communicated with the outside, an upper placing cavity is formed at the lower part of the pipe body and 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 inner diameter of the placing hole is larger than that of the containing hole, a switch spring is arranged in the placing hole, one end of the switch spring abuts against the top of the placing hole, and the other end of the switch spring abuts 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. 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.

Preferably, a pressurizing device is arranged at the top end of the accommodating hole, 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 magnetorheological polishing knife is controlled by the polishing knife driving mechanism to carry out free-moving polishing in a vertical plane, and then the workpiece is rotated by a vertical axis in cooperation with the workpiece fixing and rotating mechanism, so that the inward concave inner wall of the rotary workpiece can be quickly polished in all directions, and the polishing efficiency is greatly improved.

The rocker is controlled by the rotating disc to drive the sliding block to slide, the push rod is driven to drive the magnetorheological polishing knife to reciprocate, the driving mode is simple and efficient, and the failure rate is low.

Drawings

FIG. 1 is a schematic view of a polishing machine using a magnetorheological polishing blade according to the present invention

FIG. 2 is a schematic view of a magnetorheological finishing tool according to the present invention;

FIG. 3 is a schematic structural view of a polishing ball in a working state;

FIG. 4 is a schematic structural view of a polishing ball in a non-operating state;

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

FIG. 6 is a cross-sectional view taken along line B-B of FIG. 1;

FIG. 7 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 by referring to the drawings are exemplary and intended to be illustrative of the present invention and are not to be construed as limiting the present 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 being 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 7, an embodiment of a polishing machine using a magnetorheological polishing blade according to the present invention is a polishing machine using a magnetorheological polishing blade, which includes a magnetorheological polishing blade 101, a frame 102, a workpiece fixing and rotating mechanism 103, and a polishing blade driving mechanism 104, wherein the workpiece fixing and rotating mechanism 103 is rotatably disposed on the frame 102, and the magnetorheological polishing blade 101 is located above the workpiece fixing and rotating mechanism 103;

the polishing knife driving mechanism 104 comprises a hydraulic cylinder 112 and two groups of swing devices symmetrically arranged about a vertical plane, each group of swing devices comprises a fixed rod 113, a lever 114, a sliding cylinder 115 and a push rod 116, one end of the lever 114 is rotatably connected with a piston of the hydraulic cylinder 112, the middle of the lever 114 is rotatably connected with the bottom of the fixed rod 113, the top of the fixed rod 113 is fixedly connected with a rack, the other end of the lever 114 is rotatably connected with the top of the magnetorheological polishing knife 101, the sliding cylinder 115 is slidably arranged on the magnetorheological polishing knife 101, one end of the push rod 116 is rotatably connected between one end of the lever 114 and the middle of the lever 114, and the other end of the push rod 116 is rotatably connected on the sliding cylinder 115.

The magnetorheological polishing knife 101 is controlled by the polishing knife driving mechanism 104 to freely and movably polish in a vertical plane, and then the workpiece is rotated by a vertical axis by matching with the workpiece fixing and rotating mechanism 103, so that the inner concave wall of the rotary workpiece can be rapidly polished in all directions, and the polishing efficiency is greatly improved.

The rocker 115 is controlled by the rotating disk 114 to drive the sliding block 113 to slide, the push rod 116 is driven to drive the magnetorheological polishing knife 101 to reciprocate, the driving mode is simple and efficient, and the failure rate is low.

In order to ensure that the workpiece can rotate stably, the workpiece fixing and rotating mechanism 103 comprises a motor 105, a ball 106, a rotating table 107 and a fixing clamp 108, the fixing clamp 108 is fixed on the rotary worktable 107, a circular upper rolling groove is arranged on the rotary worktable 107, the frame 102 is provided with a circular lower rolling groove, the balls 106 are positioned in the upper rolling groove and the lower rolling groove, the motor 105 is fixed on the frame 102, the shaft of the motor 105 is connected with the rotary worktable 107 to drive the rotary worktable 107 to rotate, the radiuses of the upper rolling groove and the lower rolling groove are equal, the radius of a very large section is equal to the radius of the ball 106, but the cross sections of the upper and lower rolling grooves are small semi-circles, so that the balls 106 roll in the upper and lower rolling grooves, the rotating table 107 is ensured to rotate stably, the fixing clip 108 may be selected according to the shape of the workpiece, and may be fixed to the rotary table 107 in a stable manner.

The magnetorheological polishing knife 101 comprises a knife holder 109, an adjusting spring 110 and a knife body 111, wherein the top of the knife holder 109 is rotatably connected with one end of a sliding rod 112, which is far away from a support, the bottom of the knife holder 109 is provided with a clamping groove, the top of the knife body 111 is arranged in the clamping groove, the adjusting spring 110 is positioned in the clamping groove, one end of the adjusting spring is propped against the top of the clamping groove, the other end of the adjusting spring is propped against the top of the knife body 111, sufficient polishing pressure can be provided for the knife body 111 through the adjusting spring 110, polishing operation can be performed at different angles under sufficient pressure, the adjusting spring is connected with the knife body 111 in a groove clamping mode, and different knife bodies 111 can be conveniently replaced.

The knife body can adopt the following specific structure: the cutter body comprises a pipe body 21, magnetorheological polishing liquid 4, a polishing head 11 and polishing balls 3, wherein both the polishing head and the polishing balls 3 are magnetic, the pipe body 21 is provided with a containing hole 2 and a placing hole 1 which are communicated along the axis, the magnetorheological polishing liquid 4 is arranged in the containing hole 2 and the placing hole 1, the top of the containing hole 2 is communicated with the outside, the top end of the containing hole 2 is provided with a pressurizing device, the polishing head 11 is fixed at the bottom of the pipe body 21, a lower placing cavity 5 is arranged in the polishing head 11, the bottom of the lower placing cavity 5 is communicated with the outside, the lower part of the pipe body 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 the containing cavity, the polishing balls 3 are arranged in the containing cavity and can freely rotate, and the inner diameter of the placing hole 1 is larger than, the magnetorheological polishing fluid polishing device is characterized in that a switch spring 9 is arranged in the placing hole 1, one end of the switch spring 9 abuts against the top of the placing hole 1, the other end of the switch spring 9 abuts against the polishing ball 3, when the polishing ball 3 is in a non-working state, namely, when the polishing ball 3 is not subjected to external force towards the pipe body 21, the polishing ball 3 is in close contact with the polishing head 11, when the polishing ball 3 is in a working state, namely, when the polishing ball 3 is subjected to external force towards the pipe body 21, a gap is reserved between the polishing ball 3 and the lower placing cavity, and the magnetorheological polishing fluid 4 can flow out and attach to the 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 10, 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 seal head 8, a thrust spring 7 and a piston 6, wherein the seal head 8 is fixed at the top of the pipe body 21 to close 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 seal 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 pipe body 21 through threads, internal threads are formed in the polishing head 11, and external threads are formed in the bottom of the pipe body 21, so that the polishing head 11 and the pipe 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 tool is used, a workpiece 100 to be polished is fixed on a rotary workbench through a fixing clamp, then a proper tool body is selected and placed into a clamp groove, a motor is started to drive the rotary workbench to rotate, the workpiece starts to rotate, meanwhile, a rotating disk is started to drive a rocker to rotate, a sliding block is driven to move left and right, then the sliding block drives a push rod to drive a tool clamp handle to swing, and the magnetorheological polishing tool is controlled to swing to polish the workpiece.

As shown in fig. 3, after the polishing blade contacts the workpiece 100 to be polished, the polishing ball 3 moves upward when receiving the contact pressure, and at this time, a gap is formed between the polishing ball 3 and the lower placing cavity 5 of the polishing head 11, and the gap enables the magnetorheological polishing liquid 4 which is changed into a solid state by the action of the magnetic field to be attached to the polishing ball 3 and taken out, so as to polish the surface of the workpiece 100; as shown in fig. 4, 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. The polishing machine adopting the magnetorheological polishing knife is characterized in that: the magnetorheological polishing device comprises a magnetorheological polishing knife (101), a rack (102), a workpiece fixing and rotating mechanism (103) and a polishing knife driving mechanism (104), wherein the workpiece fixing and rotating mechanism (103) is rotatably arranged on the rack (102), and the magnetorheological polishing knife (101) is positioned above the workpiece fixing and rotating mechanism (103);

the polishing knife driving mechanism (104) comprises a sliding rod (112), a sliding block (113), a rotating disk (114), a rocker (115) and a push rod (116), one end of the sliding rod (112) is fixed on the rack (102), the sliding block (113) is arranged on the sliding rod (112) in a sliding mode, one end, close to the support, of the sliding rod (112) is provided with the rotating disk (114), the rotating disk (114) controls the sliding block (113) to slide on the sliding rod (112) through the rocker (115), the top end of the magnetorheological polishing knife (101) is rotatably connected to one end, far away from the support, of the sliding rod (112), one end of the push rod (116) is rotatably connected with the middle of the magnetorheological polishing knife (101), and the other end of the push rod (116) is rotatably connected with the sliding block (113.

2. The finishing machine of claim 1, wherein the finishing machine comprises: fixed rotary mechanism of work piece (103) includes motor (105), ball (106), swivel work head (107) and fixation clamp (108), fixation clamp (108) are fixed on swivel work head (107), be equipped with the annular rolling groove of going up on swivel work head (107), be equipped with annular rolling groove down of circle on frame (102), ball (106) are located the rolling groove and roll inslot down, motor (105) are fixed on frame (102), the axle and swivel work head (107) of motor (105) are connected, drive swivel work head (107) and rotate.

3. The finishing machine of claim 1, wherein the finishing machine comprises: the magnetorheological polishing knife (101) comprises a knife tool clamping handle (109), an adjusting spring (110) and a knife body (111), wherein the top of the knife tool clamping handle (109) is rotatably connected with one end, far away from the support, of a sliding rod (112), a clamping groove is formed in the bottom of the knife tool clamping handle (109), the top of the knife body (111) is arranged in the clamping groove, the adjusting spring (110) is located in the clamping groove, one end of the adjusting spring abuts against the top of the clamping groove, and the other end of the adjusting spring abuts against the top of the knife body (111).

4. The finishing machine of claim 3, wherein the finishing machine comprises: the cutter body (111) comprises a pipe body (21), magnetorheological polishing liquid (4), a polishing head (11) and a polishing ball (3), wherein the polishing head and the polishing ball (3) are both magnetic, the pipe body (21) is provided with a communicating containing hole (2) and a placing hole (1) along the axis, the magnetorheological polishing liquid (4) is arranged in the containing hole (2) and the placing hole (1), the top of the containing hole (2) is communicated with the outside, the polishing head (11) is fixed at the bottom of the pipe body (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, an upper placing cavity (10) is formed in the lower part of the pipe body (21), 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 arranged in the containing cavity and can rotate freely, the inner diameter of placing hole (1) is greater than the inner diameter of accommodation hole (2), it is equipped with switch spring (9) in hole (1) to place, 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 placed and leave the clearance between the chamber.

5. The finishing machine of claim 4, wherein the finishing machine comprises: the top of accommodation hole (2) is equipped with pressure device, pressure device includes head (8), thrust spring (7) and piston (6), the top at body (21) is fixed in head (8) is sealed accommodation hole (2), piston (6) and accommodation hole (2) looks adaptation and slip the setting in accommodation hole (2), thrust spring (7) set up in accommodation hole (2) between piston (6) and head (8).

6. The finishing machine of claim 4, wherein the finishing machine comprises: the inner wall of the upper placing cavity (10) is provided with at least one flow guide groove (23).

7. The finishing machine of claim 4, wherein the finishing machine comprises: the upper placing cavity (10) and/or the lower placing cavity (5) are/is provided with a liquid storage cavity (22).

8. The finishing machine of claim 4, wherein the finishing machine comprises: the polishing head (11) is connected with the pipe body (21) through threads.