CN114102420A - Multistage constant-speed self-circulation magnetorheological polishing machine - Google Patents

Multistage constant-speed self-circulation magnetorheological polishing machine Download PDF

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Publication number
CN114102420A
CN114102420A CN202111390789.2A CN202111390789A CN114102420A CN 114102420 A CN114102420 A CN 114102420A CN 202111390789 A CN202111390789 A CN 202111390789A CN 114102420 A CN114102420 A CN 114102420A
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China
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liquid
pipe
backflow
magnetorheological
coil
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CN202111390789.2A
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Chinese (zh)
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CN114102420B (en
Inventor
王鸿云
卢昊文
胡佳远
李永康
蒋彦东
卢淇洁
毕成
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Taizhou University
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Taizhou University
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B31/00Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
    • B24B31/10Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving other means for tumbling of work
    • B24B31/112Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving other means for tumbling of work using magnetically consolidated grinding powder, moved relatively to the workpiece under the influence of pressure
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B1/00Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
    • B24B1/005Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes using a magnetic polishing agent
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B31/00Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
    • B24B31/12Accessories; Protective equipment or safety devices; Installations for exhaustion of dust or for sound absorption specially adapted for machines covered by group B24B31/00

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

The invention discloses a multi-stage constant-speed self-circulation type magnetorheological polishing machine, which is used for polishing the inner wall of a pipe fitting and comprises a liquid inlet pipe, a magnetorheological polishing liquid accelerator, a thread rotator, a liquid return pipe and magnetorheological polishing liquid, wherein the magnetorheological polishing liquid sequentially flows through the liquid inlet pipe, the spiral rotator, the pipe fitting and the liquid return pipe, the magnetorheological polishing liquid flows back to the liquid inlet pipe from the tail part of the liquid return pipe, the magnetorheological polishing liquid accelerator is sleeved on the liquid inlet pipe, the thread rotator is tubular, internal threads are arranged on the inner side wall of the thread rotator and are used for enabling the magnetorheological polishing liquid flowing through the thread rotator to circumferentially rotate, at least one group of backflow control mechanisms are arranged on the liquid return pipe, each group of backflow control mechanisms comprises a backflow coil and a backflow controller, the backflow coil is sleeved on the liquid return pipe, and the backflow controller is electrically connected with the backflow coil. And various polishing forms are formed, the inner wall of the pipe fitting is polished, the polishing efficiency is greatly improved, and the same speed of the magnetorheological polishing liquid in the whole loop is ensured.

Description

Multistage constant-speed self-circulation magnetorheological polishing machine
Technical Field
The invention relates to a multistage constant-speed self-circulation magnetorheological polishing machine.
Background
The method of polishing pipes and objects with complex structures by using the magnetorheological polishing fluid is a common means, and particularly, on the polishing of the inner walls of some pipes, the magnetorheological polishing fluid can flow through the thin pipes or the pipes with curved surfaces on the inner walls to be converted into a solid-like state under the action of a magnetic field by using the liquid characteristics of the magnetorheological polishing fluid, so that the inner walls of the pipes are polished. However, the existing polishing equipment adopting the principle uses a water pump as a flow driving element of the magnetorheological polishing solution, the magnetorheological polishing solution can only flow through the pipe fitting along a straight line at a constant speed for polishing, the polishing form is single, and the polishing efficiency is low.
Disclosure of Invention
The invention aims to provide a multistage constant-speed self-circulation magnetorheological polishing machine, which can effectively solve the problem of single polishing mode and low efficiency of the existing magnetorheological polishing machine.
In order to solve the technical problems, the invention is realized by the following technical scheme: multistage at uniform velocity self-loopa formula magnetic current becomes burnishing machine for polish pipe fitting inner wall, including feed liquor pipe, magnetic current becomes liquid accelerator, screw rotator, return liquid pipe and magnetic current becomes polishing solution, magnetic current becomes polishing solution and flows through feed liquor pipe, screw rotator, pipe fitting and return liquid pipe in proper order to magnetic current becomes polishing solution and flows back to the feed liquor pipe from the afterbody of returning the liquid pipe, magnetic current becomes liquid accelerator cover and establishes on the feed liquor pipe, the screw rotator becomes the tubulose, is equipped with the internal thread on the screw rotator inside wall for let the magnetic current that flows through the screw rotator become circumferential direction and rotate, it controls the mechanism to be equipped with at least a set of return flow on the liquid pipe to return, and every backflow control mechanism of group includes return coil and backflow controller, the return coil cover is established on returning the liquid pipe, backflow controller and return coil electricity are connected.
Preferably, the magnetorheological fluid accelerator comprises a driving coil controller and at least one stage of accelerating coil, the accelerating coil is sleeved on the liquid inlet pipe, the direction of magnetic force lines of a magnetic field generated by the accelerating coil is parallel to the flowing direction of the magnetorheological polishing liquid, the driving coil controller controls all the accelerating coils to work, continuous pulse magnetic traveling waves are generated by excitation of the at least one stage of accelerating coil to drive the magnetorheological polishing liquid, and the continuous pulse magnetic traveling waves are driven by the continuous pulse magnetic traveling waves to move along the direction of the magnetic traveling waves of the magnetic field to polish the inner wall of the pipe fitting.
Preferably, the accelerating coil has at least two stages, and is sleeved on the liquid inlet pipe in sequence along the axial direction of the liquid inlet pipe, so that a gradient magnetic field is formed better, and the polishing effect is enhanced.
Preferably, the head of the liquid inlet pipe is provided with a funnel, so that the magnetorheological polishing liquid can be conveniently injected into the liquid inlet pipe.
Preferably, the backflow control mechanisms are provided with three groups, adjacent backflow control mechanisms are arranged at intervals, sufficient braking force is provided for reducing the speed of the magnetorheological fluid in the liquid return pipe, and the magnetorheological polishing fluid passing through the backflow control mechanisms is provided with a buffer interval at intervals.
Compared with the prior art, the invention has the advantages that: by arranging the magnetorheological fluid accelerator and the thread rotator, the problems of single polishing mode and low polishing efficiency of the existing magnetorheological polishing machine are solved, acceleration pulse is generated by the magnetorheological fluid accelerator to accelerate the magnetorheological fluid, the magnetorheological fluid forms pulse elasticity, and after the magnetorheological fluid passes through the thread rotator, the magnetorheological fluid generates circumferential rotation, so that various polishing forms are formed, the inner wall of a pipe fitting is polished, the polishing efficiency is greatly improved, and the mechanical precision of the product can be effectively improved. In addition, the polishing machine is also provided with at least one group of backflow control mechanisms on the liquid return pipe, and the speed of the magnetorheological polishing liquid in the liquid return pipe is controlled through the backflow coil, so that the speed of the magnetorheological polishing liquid in the whole loop is ensured to be the same, and the condition of cutoff is avoided.
Drawings
FIG. 1 is a schematic structural diagram of a multi-stage constant-speed self-circulation magnetorheological polishing machine according to the present invention;
fig. 2 is a working principle diagram of the magnetorheological fluid accelerator in the invention.
The reference signs are:
the magnetorheological fluid polishing device comprises a funnel 1, a liquid inlet pipe 2, a magnetorheological fluid accelerator 3, a driving coil controller 31, an accelerating coil 32, a thread rotator 4, an internal thread 41, a pipe fitting 5, a liquid return pipe 6, a backflow control mechanism 7, a backflow coil 71, a backflow controller 72, magnetorheological polishing liquid 8 and magnetic lines of force 9.
Detailed Description
Multistage at uniform velocity self-loopa formula magnetic current becomes burnishing machine for polish pipe fitting inner wall, including feed liquor pipe, magnetic current becomes liquid accelerator, screw rotator, return liquid pipe and magnetic current becomes polishing solution, magnetic current becomes polishing solution and flows through feed liquor pipe, screw rotator, pipe fitting and return liquid pipe in proper order to magnetic current becomes polishing solution and flows back to the feed liquor pipe from the afterbody of returning the liquid pipe, magnetic current becomes liquid accelerator cover and establishes on the feed liquor pipe, the screw rotator becomes the tubulose, is equipped with the internal thread on the screw rotator inside wall for let the magnetic current that flows through the screw rotator become circumferential direction and rotate, it controls the mechanism to be equipped with at least a set of return flow on the liquid pipe to return, and every backflow control mechanism of group includes return coil and backflow controller, the return coil cover is established on returning the liquid pipe, backflow controller and return coil electricity are connected. By arranging the magnetorheological fluid accelerator and the thread rotator, the problems of single polishing mode and low polishing efficiency of the existing magnetorheological polishing machine are solved, acceleration pulse is generated by the magnetorheological fluid accelerator to accelerate the magnetorheological fluid, the magnetorheological fluid forms pulse elasticity, and after the magnetorheological fluid passes through the thread rotator, the magnetorheological fluid generates circumferential rotation, so that various polishing forms are formed, the inner wall of a pipe fitting is polished, and the polishing efficiency is greatly improved. In addition, the polishing machine is also provided with at least one group of backflow control mechanisms on the liquid return pipe, and the speed of the magnetorheological polishing liquid in the liquid return pipe is controlled through the backflow coil, so that the speed of the magnetorheological polishing liquid in the whole loop is ensured to be the same, and the condition of cutoff is avoided.
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.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
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 and 2, an embodiment of the multi-stage constant-speed self-circulation magnetorheological polishing machine of the present invention is shown, which comprises a funnel 1, a liquid inlet pipe 2, a thread rotator 4, a pipe fitting 5, and a liquid return pipe 6 connected in sequence, wherein the tail of the liquid return pipe 6 is connected to the funnel 1, thereby forming a circulation pipeline, the circulation pipeline is filled with magnetorheological polishing liquid 8, the liquid inlet pipe 2 is provided with a magnetorheological fluid accelerator 3 for accelerating the magnetorheological polishing liquid 8 in the liquid inlet pipe 2 and forming a magnetic current pulse, after the magnetorheological polishing liquid 8 is accelerated, the thread rotator 4 is formed into a tubular shape through the thread rotator 4, the inner side wall of the thread rotator 4 is provided with internal threads 41 for allowing the magnetorheological polishing liquid 8 flowing through the thread rotator 4 to rotate circumferentially, when the magnetorheological polishing liquid 8 passes through the thread rotator 4, the magnetorheological polishing liquid is influenced by the threads on the inner side wall of the thread rotator 4, the magnetorheological polishing solution 8 rotates in the circumferential direction, so that the magnetorheological polishing solution 8 has two-direction movement dimensions. Three sets of backflow control mechanisms 7 are arranged on the backflow pipe, each set of backflow control mechanism 7 comprises a backflow coil 71 and a backflow controller 72, the backflow coil 71 is sleeved on the backflow pipe 6, the backflow controller 72 is electrically connected with the backflow coil 71, the backflow coil 71 is powered through the backflow controller 72, the backflow coil 71 generates a magnetic field, the speed of the flowing magnetorheological polishing liquid 8 is controlled, and the magnetorheological polishing liquid 8 in the whole circulation system is guaranteed to have the same speed.
The flow velocity of the magnetorheological polishing solution 8 in the liquid inlet pipe 2 is improved through the magnetorheological fluid accelerator 3, the magnetorheological fluid accelerator 3 comprises a driving coil controller 31 and two-stage accelerating coils 32, the two-stage accelerating coils 32 are sequentially sleeved on the liquid inlet pipe 2 along the axial direction of the liquid inlet pipe 2, the direction of magnetic lines 9 of a magnetic field generated by the accelerating coils 32 is parallel to the flowing direction of the magnetorheological polishing solution 8, and the driving coil controller 31 controls all the accelerating coils 32 to work.
The magnetorheological polishing solution 8 is driven to perform pulse motion along the magnetic field traveling wave direction by sequentially exciting the multistage accelerating coils 32 to generate continuous pulse magnetic traveling waves, the continuous pulse magnetic traveling waves generated by sequentially exciting the multistage accelerating coils 32 are driven to perform high-speed motion by the relative first-stage accelerating coils 32 positioned at the upstream, the second-stage accelerating coils 32 positioned at the downstream are relatively arranged, if more stages of accelerating coils 32 are sequentially analogized, the continuous pulse magnetic traveling waves generated by sequentially exciting the multistage accelerating coils 32 are driven to perform high-speed motion by the magnetorheological polishing solution 8, after pulse exciting current is introduced into the first-stage accelerating coils 32, magnetic field magnetic traveling waves are generated in air gaps around the driving coils, the magnetorheological polishing solution 8 is attracted to perform accelerated motion under the action of magnetic force, and the power supply is disconnected when the magnetorheological polishing solution 8 runs to the middle of the first-stage accelerating coils 32, so that the magnetorheological polishing solution moves out of the first-stage accelerating coils 32 by means of inertia; then enters the second stage accelerating coil 32 to accelerate again, and a plurality of coils can be arranged to accelerate according to the requirement until the required speed is met.
The magnetorheological polishing solution 8 enters the liquid inlet pipe 2 from the funnel 1, when the magnetorheological polishing solution passes through the position of the magnetorheological fluid accelerator 3, the primary accelerating coil 32 is connected with pulse exciting current through the driving coil controller 31 to instantly generate a gradient magnetic field, magnetorheological particles in the magnetorheological polishing solution 8 move along the direction of magnetic force lines 9 under the action of the magnetic field to form a magnetic chain, abrasive particles in the magnetorheological polishing solution 8 are clamped between the magnetic chains, the magnetorheological particles move towards the direction of high magnetic field intensity in the non-uniform magnetic field and push the abrasive particles to the area of low magnetic field intensity, more abrasive particles are tightly pressed on the inner surface of the pipe fitting 5 to form a flexible grinding tool, so that the inner wall of the pipe fitting 5 is more efficiently polished, the magnetorheological polishing solution 8 entering the pipe fitting 5 is changed into rotary magnetorheological pulse bullets after the action of the thread rotator 4, and the inner walls of the multi-dimensional multi-pipe fitting 5 are polished, the polishing efficiency is greatly improved. After passing through the pipe 5, three sets of backflow control mechanisms 7 are arranged on the backflow pipe 6, and the magneto-rheological polishing solution 8 in the whole circulation system has the same speed by controlling the magnetic field generated by the backflow coil 71.
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 (5)

1. Multistage homokinetic self-loopa formula magnetic current becomes burnishing machine at uniform velocity for polishing pipe fitting (5) inner wall, its characterized in that: including feed liquor pipe (2), magnetorheological suspensions accelerator (3), screw thread circulator (4), return liquid pipe (6) and magnetic current becomes polish (8), magnetic current becomes polish (8) and flows through feed liquor pipe (2), spiral circulator, pipe fitting (5) and return liquid pipe (6) in proper order to magnetic current becomes polish (8) and flows back feed liquor pipe (2) from the afterbody of returning liquid pipe (6) to, magnetic current becomes liquid accelerator (3) cover and establishes on feed liquor pipe (2), screw thread circulator (4) become the tubulose, is equipped with internal thread (41) on screw thread circulator (4) inside wall for let the magnetic current that flows through screw thread circulator (4) become circumferential direction and rotate, be equipped with at least a set of backflow control mechanism (7) on returning liquid pipe (6), every backflow control mechanism (7) of group include backflow coil (71) and backflow control ware (72), the backflow coil (71) is sleeved on the liquid return pipe (6), and the backflow controller (72) is electrically connected with the backflow coil (71).
2. The multi-stage constant-speed self-circulating magnetorheological finishing machine according to claim 1, wherein: the magnetorheological fluid accelerator (3) comprises a driving coil controller (31) and at least one stage of accelerating coil (32), the accelerating coil (32) is sleeved on the liquid inlet pipe (2), the direction of magnetic lines (9) of a magnetic field generated by the accelerating coil (32) is parallel to the flowing direction of magnetorheological polishing liquid (8), and the driving coil controller (31) controls all the accelerating coils (32) to work.
3. The multi-stage constant-speed self-circulating magnetorheological finishing machine according to claim 1, wherein: the accelerating coil (32) has at least two stages and is sequentially sleeved on the liquid inlet pipe (2) along the axial direction of the liquid inlet pipe (2).
4. The multi-stage constant-speed self-circulating magnetorheological finishing machine according to claim 1, wherein: the head of the liquid inlet pipe (2) is provided with a funnel (1).
5. The multi-stage constant-speed self-circulating magnetorheological finishing machine according to claim 1, wherein: the backflow control mechanisms (7) are divided into three groups, and the adjacent backflow control mechanisms (7) are arranged at intervals.
CN202111390789.2A 2021-11-16 2021-11-16 Multistage uniform-speed self-circulation magnetorheological polishing machine Active CN114102420B (en)

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CN107671746A (en) * 2017-10-09 2018-02-09 安徽理工大学 Hybrid electromagnetic abradant jet generating means before a kind of compound new-type
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