CN111136512A - Magnetic grinding device and method for inner wall of bearing bush - Google Patents
Magnetic grinding device and method for inner wall of bearing bush Download PDFInfo
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- CN111136512A CN111136512A CN202010049366.3A CN202010049366A CN111136512A CN 111136512 A CN111136512 A CN 111136512A CN 202010049366 A CN202010049366 A CN 202010049366A CN 111136512 A CN111136512 A CN 111136512A
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- 238000000034 method Methods 0.000 title claims abstract description 10
- 230000007246 mechanism Effects 0.000 claims abstract description 52
- 239000006061 abrasive grain Substances 0.000 claims abstract description 4
- 239000002245 particle Substances 0.000 claims description 9
- 230000035699 permeability Effects 0.000 claims description 6
- 230000006698 induction Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 230000008569 process Effects 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 claims 1
- 238000003756 stirring Methods 0.000 claims 1
- 239000011120 plywood Substances 0.000 abstract 1
- 238000003754 machining Methods 0.000 description 5
- 239000012530 fluid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
Images
Classifications
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- 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
- B24B37/00—Lapping machines or devices; Accessories
-
- 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
-
- 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
- B24B47/00—Drives or gearings; Equipment therefor
- B24B47/10—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces
- B24B47/16—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces performing a reciprocating movement, e.g. during which the sense of rotation of the working-spindle is reversed
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
本发明涉及一种轴瓦内壁的磁力研磨装置及方法，所述装置包括机架、旋转驱动装置、夹板机构、曲柄滑块机构及研磨机构；旋转驱动装置设于机架的底部，机架的顶部用于固定待加工的轴瓦工件；轴瓦工件下方的机架上设夹板机构，曲柄滑块机构由下连杆、滑块一及曲柄组成，研磨机构由上连杆及径向磁极组成，夹板机构由竖直并排设置的前挡板及后挡板组成；在旋转驱动装置的驱动下，曲柄滑块机构带动研磨机构中的径向磁极沿轴瓦工件内壁往复移动，通过径向磁极上吸附的磁性磨粒实现对待加工表面的研磨。本发明所述装置结构简单，操作方便，具有仿形加工功能，加工效率和加工精度高，适用于轴瓦类零件的磁力研磨加工。
The invention relates to a magnetic grinding device and method for the inner wall of a bearing bush. The device includes a frame, a rotary drive device, a splint mechanism, a crank-slider mechanism and a grinding mechanism; the rotary drive device is arranged at the bottom of the frame and the top of the frame It is used to fix the bearing shell workpiece to be processed; the frame under the bearing shell workpiece is provided with a splint mechanism, the crank slider mechanism is composed of a lower connecting rod, a slider 1 and a crank, the grinding mechanism is composed of an upper connecting rod and a radial magnetic pole, and the plywood mechanism It consists of a front baffle and a rear baffle arranged vertically side by side; driven by the rotary drive device, the crank-slider mechanism drives the radial magnetic poles in the grinding mechanism to reciprocate along the inner wall of the bearing workpiece, and the magnetic poles adsorbed on the radial magnetic poles The abrasive grains achieve the grinding of the surface to be machined. The device of the invention has the advantages of simple structure, convenient operation, profiling processing function, high processing efficiency and high processing precision, and is suitable for magnetic grinding processing of bearing parts.
Description
Technical Field
The invention relates to the technical field of magnetic grinding, in particular to a magnetic grinding device and method for an inner wall of a bearing bush.
Background
A plain bearing is a bearing that operates under sliding friction. Under the condition of liquid lubrication, the sliding surfaces are separated by lubricating oil without direct contact, so that the friction loss and the surface abrasion can be greatly reduced, and the oil film also has certain vibration absorption capacity. The sliding bearing works stably and reliably without noise, and is an important part in the current mechanical equipment. The portion of the shaft supported by the journal bearing is referred to as the journal, and the components within the journal bearing that mate with the journal are referred to as the bearing pads. The shape of the bearing bush is mostly a bush-shaped semi-cylindrical surface or an elliptic cylindrical surface, and in order to make the friction resistance of the sliding bearing during movement as small as possible, the inner wall of the bearing bush must be very smooth, so that the requirement on the machining precision of the inner surface of the bearing bush is very high.
Magnetic abrasive grinding (magnetic grinding) is to fill magnetic abrasive with small grain size in a magnetic field (between an N pole and an S pole), and form a magnetic grinding brush by utilizing the action of the magnetic field, so that a workpiece rotates and vibrates in the magnetic grinding brush, and the grinding of the surface of the workpiece is realized from the surface. The surface of the round workpiece is ground by magnetic force, so that the roundness precision can be improved, and the cylindricity precision can be improved, so that the magnetic grinding is more and more widely applied to grinding of the surface of the round workpiece; however, since the shape is very special (both ends of the circular inner surface have a flat structure), it is difficult to achieve magnetic polishing.
Disclosure of Invention
The invention provides a magnetic grinding device and method for the inner wall of a bearing bush, wherein the device is simple in structure, convenient to operate, high in machining efficiency and machining precision and suitable for magnetic grinding machining of bearing bush parts, and has a profiling machining function.
In order to achieve the purpose, the invention adopts the following technical scheme:
a magnetic grinding device for the inner wall of a bearing bush comprises a rack, a rotary driving device, a clamping plate mechanism, a slider-crank mechanism and a grinding mechanism; the rotary driving device is arranged at the bottom of the rack, and the top of the rack is used for fixing a bearing bush workpiece to be processed; a clamping plate mechanism is arranged on the machine frame below the bearing bush workpiece, the crank sliding block mechanism consists of a lower connecting rod, a sliding block I and a crank, the bottom of the lower connecting rod is hinged with the machine frame, a sliding groove I is arranged at the lower part of the lower connecting rod, and a sliding groove II is arranged at the upper part of the lower connecting rod; one end of the crank is connected with the rotary driving device, and the other end of the crank is matched with the first sliding groove at the lower part of the lower connecting rod through the first sliding block to realize sliding connection; the grinding mechanism consists of an upper connecting rod and a radial magnetic pole, and the upper end of the upper connecting rod is fixedly connected with the radial magnetic pole; the clamping plate mechanism consists of a front baffle and a rear baffle which are vertically arranged side by side, and the front baffle and the rear baffle are arranged perpendicular to the axis of the bearing bush workpiece; the front baffle and the rear baffle are correspondingly provided with guide grooves along the longitudinal direction, the guide grooves on the rear baffle are horizontal grooves, the guide grooves on the front baffle are composed of horizontal groove sections at two ends and arc-shaped groove sections in the middle, and the arc-shaped groove sections are bent downwards; the upper connecting rod is arranged in a gap between the front baffle and the rear baffle, a first pin shaft and a second pin shaft are arranged on the lower portion of the upper connecting rod one above the other, the first pin shaft penetrates through a guide groove in the rear baffle and then is in sliding connection with a second sliding groove in the lower connecting rod through the cooperation of a second sliding block, and the extending end of the second pin shaft is arranged in the guide groove in the front baffle; under the drive of the rotary driving device, the crank slider mechanism drives the radial magnetic pole in the grinding mechanism to reciprocate along the inner wall of the bearing bush workpiece, and the grinding of the surface to be processed is realized through the magnetic abrasive particles adsorbed on the radial magnetic pole.
The machine frame consists of a bottom plate, 2L-shaped stand columns and a U-shaped supporting plate, the bottom ends of the long edges of the 2L-shaped stand columns are fixed on the bottom plate, the short edges horizontally extend towards the same side, through holes are formed in the short edges, and the bearing bush workpiece is fixed by sequentially penetrating through the through holes in the short edges and threaded holes in the bearing bush workpiece from top to bottom through countersunk screws; the middle parts of the 2L-shaped stand columns are connected through a U-shaped supporting plate, and the bottom of the clamping plate mechanism is fixedly connected with the U-shaped supporting plate through a plurality of countersunk head screws; the base is fixedly arranged on the bottom plate, and the bottom end of the lower connecting rod is hinged with the base.
The front baffle plate and the rear baffle plate are fixedly connected through a plurality of sunk screws.
The rotary driving device is a variable frequency motor and is fixed above the bottom plate through a motor base; the output shaft of the variable frequency motor is connected with one end of the short shaft through the coupler, and the other end of the short shaft is connected with the crank through a key.
A magnetic grinding method for the inner wall of a bearing bush comprises the following steps:
1) mounting a bearing bush workpiece on a rack, adjusting the height of the bearing bush workpiece by taking the inner surface of the bearing bush workpiece as a positioning reference, and fixing the bearing bush workpiece through a countersunk head screw;
2) the sizes of all parts of the crank sliding block mechanism and the specific sizes of the guide grooves on the front baffle and the rear baffle in the clamping plate mechanism are determined according to the inner diameter of the bearing bush workpiece, and the distance between the radial magnetic pole and the inner surface of the bearing bush workpiece is 0.5-2 mm after installation;
3) mixing magnetic abrasive particles and water-based grinding fluid according to the ratio of 2: 3, the mixture is adsorbed on a radial magnetic pole after being stirred uniformly, and the grinding pressure generated by magnetic grinding is as follows:
in the formula (1), B is the magnetic induction intensity, mumIs the relative permeability, mu, of the magnetic abrasive grains0Is air permeability and takes the value of mu0＝4π×10-7H/m；
4) Starting a variable frequency motor to drive a crank-link mechanism to move, wherein the motion trail of a radial magnetic pole is adapted to the shape of the inner surface of the bearing bush workpiece, namely, the planes corresponding to the two ends of the bearing bush workpiece move linearly, and the arc-shaped plane corresponding to the middle part of the bearing bush workpiece moves circularly; and the radial magnetic poles attract the magnetic abrasive particles to reciprocate along the inner surface of the bearing bush workpiece to complete grinding.
Compared with the prior art, the invention has the beneficial effects that:
the device has the advantages of simple structure, convenient operation, profiling function, high processing efficiency and high processing precision, and is suitable for magnetic grinding processing of bearing bush parts.
Drawings
Fig. 1 is a schematic perspective view (front view) of a magnetic grinding device for an inner wall of a bearing bush according to the present invention.
Fig. 2 is a schematic perspective view (rear view) of a magnetic grinding device for the inner wall of a bearing bush according to the present invention.
Fig. 3 is a schematic view of the connection relationship between the slider-crank mechanism and the related components (without the tailgate).
Fig. 4 is a schematic structural diagram of the grinding mechanism of the present invention.
In the figure: 1. the bottom plate 2, the motor base 3, the variable frequency motor 4, the coupler 5, the short shaft 6, the base 7, the lower connecting rod 8, the crank 9, the L-shaped upright post 10, the bearing bush workpiece 11, the rear baffle 12, the upper connecting rod 13, the radial magnetic pole 14, the pin shaft two 15, the front baffle 16, the U-shaped supporting plate 17, the sliding block two 18, the sliding block one 19, the sliding groove one 20, the sliding groove two 21, the guide groove 22 on the rear baffle and the guide groove on the front baffle
Detailed Description
The following further describes embodiments of the present invention with reference to the accompanying drawings:
as shown in fig. 1, 2 and 3, the magnetic grinding device for the inner wall of the bearing bush of the invention comprises a frame, a rotary driving device, a clamping plate mechanism, a slider-crank mechanism and a grinding mechanism; the rotary driving device is arranged at the bottom of the frame, and the top of the frame is used for fixing a bearing bush workpiece 10 to be processed; a clamping plate mechanism is arranged on the machine frame below the bearing bush workpiece 10, the crank sliding block mechanism consists of a lower connecting rod 7, a first sliding block 18 and a crank 8, the bottom of the lower connecting rod 7 is hinged with the machine frame, a first sliding groove 19 is arranged at the lower part of the lower connecting rod 7, and a second sliding groove 20 is arranged at the upper part of the lower connecting rod 7; one end of the crank 8 is connected with the rotary driving device, and the other end of the crank is matched with a first sliding groove 19 at the lower part of the lower connecting rod 7 through a first sliding block 18 to realize sliding connection; the grinding mechanism consists of an upper connecting rod 12 and a radial magnetic pole 13, and the upper end of the upper connecting rod 12 is fixedly connected with the radial magnetic pole 13; the clamping plate mechanism consists of a front baffle plate 15 and a rear baffle plate 11 which are vertically arranged side by side, and the front baffle plate 15 and the rear baffle plate 11 are arranged perpendicular to the axis of the bearing bush workpiece 10; the front baffle 15 and the rear baffle 11 are correspondingly provided with guide grooves 22 and 21 along the longitudinal direction, the guide groove 21 on the rear baffle is a horizontal groove, the guide groove 22 on the front baffle consists of horizontal groove sections at two ends and an arc-shaped groove section in the middle, and the arc-shaped groove section is bent downwards; the upper connecting rod 12 is arranged in a gap between the front baffle 15 and the rear baffle 11, a first pin shaft and a second pin shaft 14 are arranged on the lower portion of the upper connecting rod 12 one above the other, the first pin shaft penetrates through a guide groove 21 on the rear baffle and then is matched with a second sliding groove 20 on the lower connecting rod 7 through a second sliding block 17 to realize sliding connection, and the extending end of the second pin shaft 14 is arranged in a guide groove 22 on the front baffle; under the drive of the rotary driving device, the crank-slider mechanism drives the radial magnetic pole 13 in the grinding mechanism to reciprocate along the inner wall of the bearing bush workpiece 10, and the grinding of the surface to be processed is realized through the magnetic abrasive particles adsorbed on the radial magnetic pole 13.
The machine frame consists of a bottom plate 1, 2L-shaped upright posts 9 and a U-shaped supporting plate 16, the bottom ends of the long edges of the 2L-shaped upright posts 9 are fixed on the bottom plate 1, the short edges horizontally extend towards the same side, through holes are formed in the short edges, and the bearing bush workpiece 10 is fixed by sequentially penetrating through the through holes in the short edges and threaded holes in the bearing bush workpiece 10 from top to bottom through countersunk screws; the middle parts of the 2L-shaped upright posts 9 are connected through a U-shaped supporting plate 16, and the bottom of the clamping plate mechanism is fixedly connected with the U-shaped supporting plate 16 through a plurality of sunk screws; the base 6 is fixedly arranged on the bottom plate 1, and the bottom end of the lower connecting rod 7 is hinged with the base 6.
The front baffle 15 and the rear baffle 11 are fixedly connected through a plurality of countersunk head screws.
The rotary driving device is a variable frequency motor 3 and is fixed above the bottom plate 1 through a motor base 2; the output shaft of variable frequency motor 3 passes through shaft coupling 4 and links to each other with the one end of minor axis 5, and the other end of minor axis 5 passes through the key-type connection with crank 8.
A magnetic grinding method for the inner wall of a bearing bush comprises the following steps:
1) mounting the bearing bush workpiece 10 on a frame, adjusting the height of the bearing bush workpiece 10 by taking the inner surface of the bearing bush workpiece 10 as a positioning reference, and fixing the bearing bush workpiece 10 through a countersunk head screw;
2) the sizes of all parts of the crank slide block mechanism and the specific sizes of the guide grooves 22 and 21 on the front baffle plate 15 and the rear baffle plate 11 in the clamping plate mechanism are determined according to the inner diameter of the bearing bush workpiece 10, and the distance between the installed radial magnetic pole 13 and the inner surface of the bearing bush workpiece 10 is 0.5-2 mm;
3) mixing magnetic abrasive particles and water-based grinding fluid according to the ratio of 2: 3, the mixture is adsorbed on the radial magnetic pole 13 after being uniformly stirred, and the grinding pressure generated by magnetic grinding is as follows:
in the formula (1), B is the magnetic induction intensity, mumIs the relative permeability, mu, of the magnetic abrasive grains0Is air permeability and takes the value of mu0＝4π×10-7H/m；
4) Starting the variable frequency motor 3 to drive the crank link mechanism to move, wherein the motion trail of the radial magnetic pole 13 is adapted to the shape of the inner surface of the bearing bush workpiece 10, namely, the planes corresponding to the two ends of the bearing bush workpiece 10 move linearly, and the arc-shaped plane corresponding to the middle part of the bearing bush workpiece 10 moves circularly; the grinding process is completed by the reciprocating motion of the magnetic abrasive particles absorbed by the radial magnetic poles 13 along the inner surface of the bearing bush workpiece 10.
The crank-slider mechanism is a main moving part of the magnetic grinding device. The crank 8 is connected with the short shaft 5 through a flat key, the short shaft 5 is connected with an output shaft of the variable frequency motor 3 through the coupler 4, and the variable frequency motor 3 provides power to enable the crank 8 to do circular motion. The crank 8 is connected with the first slide block 18 through the short shaft 5, and the first slide block 18 reciprocates in the first slide groove 19 to enable the lower connecting rod 7 to swing back and forth around a hinge point at the bottom.
As shown in fig. 3 and 4, the lower part of the upper connecting rod 12 is provided with two through holes, wherein a first pin shaft is arranged in the upper through hole and is slidably connected with a second sliding groove 20 on the lower connecting rod 7 through a second sliding block 17, and a second pin shaft 14 is arranged in the lower through hole and is matched with a guide groove 22 on the front baffle, so that the upper connecting rod 12 moves along the inner surface of the bearing bush workpiece 10 while swinging back and forth; the top end of the upper connecting rod 12 is provided with a radial magnetic pole 13, and magnetic abrasive materials are adsorbed around the radial magnetic pole 13; through the mutual cooperation of all mechanisms, the magnetic grinding materials on the radial magnetic poles 13 can grind the planes at two ends of the bearing bush workpiece 10 during linear motion, and can grind the arc-shaped inner surface in the middle of the bearing bush workpiece 10 during circular motion, so that the magnetic grinding processing on the inner wall of the bearing bush workpiece 10 is finally realized.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010049366.3A CN111136512B (en) | 2020-01-16 | 2020-01-16 | Magnetic grinding device and method for inner wall of bearing bush |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010049366.3A CN111136512B (en) | 2020-01-16 | 2020-01-16 | Magnetic grinding device and method for inner wall of bearing bush |
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| CN111136512A true CN111136512A (en) | 2020-05-12 |
| CN111136512B CN111136512B (en) | 2024-07-02 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112207377A (en) * | 2020-11-13 | 2021-01-12 | 辽宁科技大学 | A device and method for electrolytic magnetic composite polishing plane |
| CN112571267A (en) * | 2020-12-10 | 2021-03-30 | 周凯锋 | Automatic polishing equipment for hard pipeline for heating ventilation |
| CN112605794A (en) * | 2020-11-30 | 2021-04-06 | 衢州乐创节能科技有限公司 | Bearing bush turning over and transposition grinding device |
| CN113561169A (en) * | 2021-07-30 | 2021-10-29 | 三峡大学 | Lifting pick and place manipulator based on chute structure and using method |
| CN113664625A (en) * | 2021-09-09 | 2021-11-19 | 南京航太机电有限公司 | Magnetic grinding device and method for bead-shaped inner spherical surface |
| CN114985915A (en) * | 2022-06-02 | 2022-09-02 | 深圳市斯凯乐激光科技有限公司 | Galvanometer laser stitch welding equipment |
| CN115256201A (en) * | 2022-08-02 | 2022-11-01 | 国家电网有限公司 | Online polishing device for main shaft of hydraulic generator |
| CN117921533A (en) * | 2024-03-07 | 2024-04-26 | 国家电投集团郑州燃气发电有限公司 | Automatic grinding and repairing device for bearing bush and pillow |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112207377A (en) * | 2020-11-13 | 2021-01-12 | 辽宁科技大学 | A device and method for electrolytic magnetic composite polishing plane |
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| CN112571267B (en) * | 2020-12-10 | 2022-05-20 | 浙江东飞管道科技有限公司 | Automatic polishing equipment for hard pipeline for heating ventilation |
| CN113561169A (en) * | 2021-07-30 | 2021-10-29 | 三峡大学 | Lifting pick and place manipulator based on chute structure and using method |
| CN113664625A (en) * | 2021-09-09 | 2021-11-19 | 南京航太机电有限公司 | Magnetic grinding device and method for bead-shaped inner spherical surface |
| CN114985915A (en) * | 2022-06-02 | 2022-09-02 | 深圳市斯凯乐激光科技有限公司 | Galvanometer laser stitch welding equipment |
| CN115256201A (en) * | 2022-08-02 | 2022-11-01 | 国家电网有限公司 | Online polishing device for main shaft of hydraulic generator |
| CN117921533A (en) * | 2024-03-07 | 2024-04-26 | 国家电投集团郑州燃气发电有限公司 | Automatic grinding and repairing device for bearing bush and pillow |
| CN117921533B (en) * | 2024-03-07 | 2024-08-20 | 国家电投集团郑州燃气发电有限公司 | Automatic grinding and repairing device for bearing bush and pillow |
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| Publication number | Publication date |
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| CN111136512B (en) | 2024-07-02 |
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