CN111128509A - Adjustable magnetic field generating device for finishing magnetic grinding tool - Google Patents
Adjustable magnetic field generating device for finishing magnetic grinding tool Download PDFInfo
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- CN111128509A CN111128509A CN201911237717.7A CN201911237717A CN111128509A CN 111128509 A CN111128509 A CN 111128509A CN 201911237717 A CN201911237717 A CN 201911237717A CN 111128509 A CN111128509 A CN 111128509A
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- magnetic
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
- B24B1/005—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes using a magnetic polishing agent
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The invention provides an adjustable magnetic field generating device for finishing processing of a magnetic grinding tool, belonging to the technical field of finishing processing of the surface of a mechanical part, wherein a curved magnetic pole plate is selected to replace a plane magnetic pole plate so as to enhance the magnetic gathering capacity of the plane magnetic pole plate and make up for the magnetic leakage defect of a large-size magnetic pole plate; the teeth are added on the magnetic pole plate to further enhance the local magnetic field of the processed part, so that the local regulation and control of the magnetic field are realized; meanwhile, the invention can change the distribution of the magnetic field by adjusting the angle and the distance between the magnetic pole plates, the curvature of the magnetic pole plates, the tooth height and other parameters, thereby improving the finishing effect on the surface of the complex rotary part. The invention has the advantages of multi-parameter adjustability, simple and compact structure and convenient adjustment, and can be widely applied to the finishing processing of magnetic grinding tools of complex rotary parts.
Description
Technical Field
The invention belongs to the technical field of surface finishing of mechanical parts, and particularly discloses an adjustable magnetic field generating device for finishing a magnetic grinding tool.
Background
With the development of the level of manufacturing industry, the modern industrial production leads the machine to develop towards the direction of precision, high speed and multiple functions, the surface of the part is increasingly complex, and the precision requirement is higher and higher. However, various defects of different degrees, such as pits and scratches on the surface of a part, and burrs and flashes generated at the interface of a processing surface, are always left on the surface of a workpiece in the process of processing a mechanical product from a blank to a finished product. These defects not only affect the quality of the product itself, but also reduce the reliability and stability of the entire mechanical system.
The magnetic grinding tool finishing technology is a non-traditional precise surface finishing method. The technology is a new technology for realizing the surface finishing of the workpiece by utilizing the acting force generated by the magnetic grinding tool under the action of a magnetic field and the relative motion between the workpiece and the magnetic pole. With the application of the technology becoming more and more extensive, the technology has higher requirements on the processing performance, for example, in the finishing process of certain valve core parts, the working edge is ensured to be a sharp edge while the burrs of the edge of the pressure equalizing groove are accurately removed; the processing of wide and narrow grooves of some parts requires that the magnetic grinding tool can uniformly polish the depth and the side surface of the narrow gap. This requires precise control of the magnetic field during the machining of such complex rotating parts.
The magnetic field generating device is the key for realizing the finishing processing of the magnetic grinding tool, the size of a magnetic pole head of the existing electromagnetic field generating device is generally small, the angle is not adjustable, the distance between the magnetic pole heads is not adjustable or the adjustable range is limited, and the distribution of a magnetic field can not be controlled as required. However, increasing the pole head size and the pole head pitch increases the leakage flux of the device and impairs the device performance. Therefore, the current electromagnetic field generating device can not meet the finishing requirement of complex precision parts.
In order to solve the problems, the invention provides the adjustable magnetic field generating device for the finishing processing of the magnetic grinding tool, which can meet different processing requirements of complex rotary parts.
Disclosure of Invention
The invention provides an adjustable magnetic field generating device for finishing magnetic grinding tools, which can be used for additionally arranging magnetic pole plates on magnetic pole heads on the premise of not changing the number of turns of coils, and regulating and controlling the magnetic field intensity and the magnetic field distribution of a processing area by changing the angle and the distance between the magnetic pole plates, the curvature of the magnetic pole plates, the tooth height and other parameters to achieve the purpose of improving the finishing effect of parts.
In order to achieve the purpose, the invention provides an adjustable magnetic field generating device for finishing a magnetic grinding tool, which is used for providing adjustable magnetic force for the magnetic grinding tool so as to enable the magnetic grinding tool to interact with the surface of a workpiece, and the device comprises a left magnetic pole head, a left pole column, a left support, a left coil framework, a left coil, a left iron core, a magnetic yoke, a bottom plate, a right iron core, a right coil framework, a right coil, a direct-current power supply, a right support, a right pole column, a right magnetic pole head, a right magnetic pole plate and a left magnetic pole plate; the left support and the right support are vertically fixed on the bottom plate; the left iron core and the right iron core are horizontally fixed on the left support and the right support respectively through transition fit; the magnetic yoke is fixed on the left iron core and the right iron core in a transition fit mode; the left coil framework and the right coil framework are respectively fixed on the left iron core and the right iron core; the left coil and the right coil are respectively wound on the left coil framework and the right coil framework; the left pole and the right pole are horizontally arranged on the left iron core and the right iron core respectively through clearance fit and are fixed through a set screw, and the axes of the poles and the iron cores are in a vertical intersection state; the left magnetic pole head and the right magnetic pole head are respectively arranged on the left pole column and the right pole column through the swing pair; the left magnetic pole plate and the right magnetic pole plate are fixedly connected to the left magnetic pole head and the right magnetic pole head respectively; the direct current power supply is connected with the left coil and the right coil in series through leads.
Furthermore, the surfaces of the left magnetic pole plate and the right magnetic pole plate connected with the magnetic pole heads are planes, and the opposite surfaces are concave surfaces; the concave surface is provided with teeth corresponding to the part needing strengthening processing on the workpiece.
Further, the radius of curvature of the concave surface ranges from 30mm to 50mm, and the thickness of the thinnest portion of the left and right magnetic pole plates 16 ranges from 6mm to 10 mm.
Furthermore, the height range of the teeth on the concave surface is 6mm-10mm, the thickness is determined according to the parts needing strengthening processing on the workpiece, and the quantity and the distribution correspond to the parts needing strengthening processing on the workpiece.
Further, the swing angle range of the left magnetic pole head and the right magnetic pole head is 0-20 degrees.
Furthermore, the connecting surface of the left pole and the left magnetic pole head is a curved surface with the same curvature radius, the surface of the left pole is a concave surface, and the surface of the left magnetic pole head is a convex surface; the connecting surface of the right pole column and the right pole head is a curved surface with the same curvature radius, the surface of the right pole column is a concave surface, and the surface of the right pole head is a convex surface.
Further, the number of turns of the left coil and the right coil ranges from 2000 turns to 6000 turns.
Further, the direct current power supply is arranged on the bottom plate.
The invention has the beneficial effects that:
1. the angle and the distance between the magnetic pole plates, the curvature of the magnetic pole plates, the parameters of the teeth and the like can be regulated and controlled, so that the magnetic field intensity and the magnetic field distribution of a processing area are changed on the premise of not changing the number of turns of the coil and the structure of the device;
2. the magnetic pole plate tooth adding form optimizes the regulation and control performance of the magnetic field and realizes the targeted processing of complex parts;
3. the whole device has simple structure, low cost and convenient use.
Drawings
FIG. 1 is a front view of an adjustable magnetic field generating device for finishing a magnetic abrasive article according to the present invention;
FIG. 2 is a horizontal cross-sectional view of the controllable magnetic field generating device of FIG. 1;
FIG. 3 is a front view of a magnetic pole plate of the controllable magnetic field generating device shown in FIG. 1;
FIG. 4 is a top view of the pole plate shown in FIG. 1;
fig. 5 is a left side view of the magnetic pole plate shown in fig. 1.
In the figure: 1-left pole head, 2-left pole, 3-left support, 4-left coil skeleton, 5-left coil, 6-left iron core, 7-magnetic yoke, 8-bottom plate, 9-right iron core, 10-right coil skeleton, 11-right coil, 12-direct current power supply, 13-right support, 14-right pole, 15-right pole head, 16-right pole plate, and 17-left pole plate.
Detailed Description
Example 1
The embodiment provides an adjustable magnetic field generating device for finishing a magnetic grinding tool, which is used for providing adjustable magnetic force for the magnetic grinding tool to enable the magnetic grinding tool to interact with the surface of a workpiece, and comprises a left magnetic pole head 1, a left pole post 2, a left support 3, a left coil framework 4, a left coil 5, a left iron core 6, a magnetic yoke 7, a bottom plate 8, a right iron core 9, a right coil framework 10, a right coil 11, a direct-current power supply 12, a right support 13, a right pole post 14, a right magnetic pole head 15, a right magnetic pole plate 16 and a left magnetic pole plate 17; the left support 3 and the right support 13 are vertically fixed on the bottom plate 8; the left iron core 6 and the right iron core 9 are horizontally fixed on the left support 3 and the right support 13 respectively through transition fit; the magnetic yoke 7 is fixed on the left iron core 6 and the right iron core 9 in a transition fit mode; the left coil framework 4 and the right coil framework 10 are respectively fixed on the left iron core 6 and the right iron core 9; the left coil 5 and the right coil 11 are respectively wound on the left coil framework 4 and the right coil framework 10; the left pole post 2 and the right pole post 14 are respectively and horizontally arranged on the left iron core 6 and the right iron core 9 through clearance fit and are fixed through a set screw, and the axes of the pole posts and the iron cores are in a vertical intersection state; the left magnetic pole head 1 and the right magnetic pole head 15 are respectively arranged on the left pole post 2 and the right pole post 14 through a swing pair; the left magnetic pole plate 17 and the right magnetic pole plate 16 are respectively fixedly connected to the left magnetic pole head 1 and the right magnetic pole head 15; the direct current power supply 12 is connected in series with the left coil 5 and the right coil 11 through wires.
Furthermore, the surfaces of the left magnetic pole plate 17 and the right magnetic pole plate 16 connected with the magnetic pole heads are planes, and the opposite surfaces are concave surfaces; the concave surface is provided with teeth corresponding to the part needing strengthening processing on the workpiece.
Further, the radius of curvature R of the concave surface ranges from 30mm to 50mm, and the thickness of the thinnest position of the left magnetic pole plate 17 and the right magnetic pole plate 16 ranges from 6mm to 10 mm.
Furthermore, the height h of the teeth on the concave surface ranges from 6mm to 10mm, the thickness b is determined according to the parts of the workpiece needing strengthening processing, and the quantity and the distribution correspond to the parts of the workpiece needing strengthening processing.
Further, the swing angle of the left magnetic pole head 1 and the right magnetic pole head 15 ranges from 0 ° to 20 °.
Furthermore, the connecting surface of the left pole post 2 and the left magnetic pole head 1 is a curved surface with the same curvature radius, the surface of the left pole post 2 is a concave surface, and the surface of the left magnetic pole head 1 is a convex surface; the connecting surface of the right pole post 14 and the right magnetic pole head 15 is a curved surface with the same curvature radius, the surface of the right pole post 14 is a concave surface, and the surface of the right magnetic pole head 15 is a convex surface. The magnetic pole head and the pole post swing through the cooperation of the convex surface and the concave surface.
Further, the number of turns of the left coil 5 and the right coil 11 ranges from 2000 turns to 6000 turns.
Further, a dc power supply 12 is disposed on the chassis 8.
The magnetic pole plate adopted by the adjustable magnetic field generating device for finishing the magnetic grinding tool can enhance the magnetic field intensity between the magnetic pole plates, and teeth are added at the curved surface part of the magnetic pole plate, so that the magnetic field is further concentrated at the part needing to be strengthened and processed, and the processing effect is improved; different magnetic pole plates can be replaced, and the utilization rate of the magnetic field generating device is improved.
Example 2
The digital display adjustable linear high-voltage power supply produced by Hongkong Longwei instruments and meters Limited is adopted, the model is TPR-12010D (the output voltage is continuously adjustable at 0-120V, the output current is 0-10A), the current is 2.5A, the number of turns of a coil is 2000 turns, the included angle of a magnetic pole plate is 0 degree, the curvature radius of the magnetic pole plate is 50mm, and the thickness of the thinnest position of the magnetic pole plate is 6 mm; and under the condition that the tooth height h of the magnetic pole plate is 6mm, the magnetic induction intensity of the processing area is tested, and the result shows that the maximum value of the magnetic induction intensity of the processing area is 273 mT.
The magnetic field generating device and the magnetic grinding tool with the granularity of 180# are adopted to carry out the finishing processing of the magnetic grinding tool on the valve core (440 c stainless steel) produced by a certain unit, after 30min, the surface roughness Ra value is reduced from 0.428 mu m to 0.130 mu m, and the burrs of the edge are removed.
Example 3
The digital display adjustable linear high-voltage power supply produced by Hongkong Longwei instruments and meters Limited is adopted, the model is TPR-12010D (the output voltage is continuously adjustable at 0-120V, the output current is 0-10A), the current is 2.5A, the number of turns of a coil is 4000 turns, the included angle of a magnetic pole plate is 0 degree, the curvature radius of the magnetic pole plate is 50mm, and the thickness of the thinnest position of the magnetic pole plate is 10 mm; and under the condition that the tooth height h of the magnetic pole plate is 8mm, the magnetic induction intensity of the processing area is tested, and the result shows that the maximum value of the magnetic induction intensity of the processing area is 320 mT.
The magnetic field generating device and a magnetic grinding tool with the granularity of 180# are adopted to carry out the finishing processing of the magnetic grinding tool on a valve core (440 c stainless steel) produced by a certain unit, after 30min, the surface roughness Ra value is reduced from 0.431 mu m to 0.119 mu m, and the burrs of the edge are removed.
Example 4
The digital display adjustable linear high-voltage power supply produced by Hongkong Longwei instruments and meters Limited is adopted, the model is TPR-12010D (the output voltage is continuously adjustable at 0-120V, the output current is 0-10A), the current is 2.5A, the number of turns of a coil is 4000 turns, the included angle of a magnetic pole plate is 10 degrees, the curvature radius of the magnetic pole plate is 30mm, and the thickness of the thinnest position of the magnetic pole plate is 6 mm; the magnetic induction intensity of the processing area is tested under the condition that the tooth height h of the magnetic pole plate is 10mm, and the result shows that the maximum value of the magnetic induction intensity of the processing area is 347 mT.
The magnetic field generating device and the magnetic grinding tool with the granularity of 180# are adopted to carry out the finishing processing of the magnetic grinding tool on the valve core (440 c stainless steel) produced by a certain unit, after 30min, the surface roughness Ra value is reduced from 0.411 mu m to 0.112 mu m, and the burrs of the edge are removed.
Example 5
The digital display adjustable linear high-voltage power supply produced by Hongkong Longwei instruments and meters Limited is adopted, the model is TPR-12010D (the output voltage is continuously adjustable at 0-120V, the output current is 0-10A), the current is 2.5A, the number of turns of a coil is 6000 turns, the included angle of a magnetic pole plate is 10 degrees, the curvature radius of the magnetic pole plate is 40mm, and the thickness of the thinnest position of the magnetic pole plate is 8 mm; and under the condition that the tooth height h of the magnetic pole plate is 8mm, the magnetic induction intensity of the processing area is tested, and the result shows that the maximum value of the magnetic induction intensity of the processing area is 387 mT.
The magnetic field generating device and the magnetic grinding tool with the granularity of 180# are adopted to carry out the finishing processing of the magnetic grinding tool on the valve core (440 c stainless steel) produced by a certain unit, after 30min, the surface roughness Ra value is reduced from 0.399 mu m to 0.106 mu m, and the burrs of the edge are removed.
Example 6
The digital display adjustable linear high-voltage power supply produced by Hongkong Longwei instruments and meters Limited is adopted, the model is TPR-12010D (the output voltage is continuously adjustable at 0-120V, the output current is 0-10A), the current is 2.5A, the number of turns of a coil is 6000 turns, the included angle of a magnetic pole plate is 20 degrees, the curvature radius of the magnetic pole plate is 30mm, and the thickness of the thinnest position of the magnetic pole plate is 6 mm; the magnetic induction intensity of the processing area is tested under the condition that the tooth height h of the magnetic pole plate is 10mm, and the result shows that the maximum value of the magnetic induction intensity of the processing area is 424 mT.
The magnetic field generating device and the magnetic grinding tool with the granularity of 180# are adopted to carry out the finishing processing of the magnetic grinding tool on the valve core (440 c stainless steel) produced by a certain unit, after 30min, the surface roughness Ra value is reduced from 0.415 mu m to 0.099 mu m, and the edge burrs are removed.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, or direct or indirect applications in other related fields, which are made by the contents of the present specification, are included in the scope of the present invention.
Claims (7)
1. An adjustable magnetic field generating device for finishing a magnetic grinding tool is used for providing adjustable magnetic force for the magnetic grinding tool and enabling the magnetic grinding tool to interact with the surface of a workpiece, and is characterized by comprising a left magnetic pole head (1), a left pole column (2), a left support (3), a left coil framework (4), a left coil (5), a left iron core (6), a magnetic yoke (7), a bottom plate (8), a right iron core (9), a right coil framework (10), a right coil (11), a direct-current power supply (12), a right support (13), a right pole column (14), a right magnetic pole head (15), a right magnetic pole plate (16) and a left magnetic pole plate (17);
the left support (3) and the right support (13) are vertically fixed on the bottom plate (8);
the left iron core (6) and the right iron core (9) are horizontally fixed on the left support (3) and the right support (13) respectively through transition fit;
the magnetic yoke (7) is fixed on the left iron core (6) and the right iron core (9) in a transition fit mode;
the left coil framework (4) and the right coil framework (10) are respectively fixed on the left iron core (6) and the right iron core (9);
the left coil (5) and the right coil (11) are respectively wound on the left coil framework (4) and the right coil framework (10);
the left pole column (2) and the right pole column (14) are respectively and horizontally arranged on the left iron core (6) and the right iron core (9) through clearance fit and are fixed through a set screw, and the axes of the pole columns and the iron cores are in a vertical intersection state;
the left magnetic pole head (1) and the right magnetic pole head (15) are respectively arranged on the left pole column (2) and the right pole column (14) through a swing pair;
the left magnetic pole plate (17) and the right magnetic pole plate (16) are fixedly connected to the left magnetic pole head (1) and the right magnetic pole head (15) respectively;
the direct current power supply (12) is connected with the left coil (5) and the right coil (11) in series through leads.
2. The device of claim 1, wherein the left and right magnetic pole plates (17, 16) are flat and concave at the surface where they are connected to the magnetic pole head;
and the concave surface is provided with teeth corresponding to the part needing strengthening processing on the workpiece.
3. The device of claim 2, wherein the radius of curvature of the concave surface is in the range of 30mm to 50mm, and the thickness of the thinnest portion of the left magnetic pole plate (17) and the right magnetic pole plate (16) is in the range of 6mm to 10 mm.
4. The device of claim 3, wherein the teeth of the concave surface have a height ranging from 6mm to 10mm, a thickness determined according to the portion of the workpiece to be strengthened, and a number and distribution corresponding to the portion of the workpiece to be strengthened.
5. The device of claim 4, wherein the left and right magnetic pole heads (1, 15) are arranged to swing through an angle in the range of 0 ° to 20 °.
6. The adjustable magnetic field generating device for finishing of the magnetic grinding tool according to claim 5, wherein the connecting surface of the left pole column (2) and the left magnetic pole head (1) is a curved surface with the same curvature radius, the surface of the left pole column (2) is a concave surface, and the surface of the left magnetic pole head (1) is a convex surface;
the connection surface of the right pole column (14) and the right magnetic pole head (15) is a curved surface with the same curvature radius, the surface of the right pole column (14) is a concave surface, and the surface of the right magnetic pole head (15) is a convex surface.
7. The controllable magnetic field generating device for magnetic abrasive finishing according to claim 1, wherein the number of turns of the left coil (5) and the right coil (11) ranges from 2000 turns to 6000 turns.
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| CN201911237717.7A CN111128509A (en) | 2019-12-06 | 2019-12-06 | Adjustable magnetic field generating device for finishing magnetic grinding tool |
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| CN201911237717.7A CN111128509A (en) | 2019-12-06 | 2019-12-06 | Adjustable magnetic field generating device for finishing magnetic grinding tool |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114029850A (en) * | 2021-11-23 | 2022-02-11 | 大连理工大学 | Multi-magnetic-field complex curved surface chemical mechanical polishing equipment |
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