CN213258592U - Grinding device for sink cutting journal fillet of marine crankshaft - Google Patents
Grinding device for sink cutting journal fillet of marine crankshaft Download PDFInfo
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- CN213258592U CN213258592U CN202022083802.7U CN202022083802U CN213258592U CN 213258592 U CN213258592 U CN 213258592U CN 202022083802 U CN202022083802 U CN 202022083802U CN 213258592 U CN213258592 U CN 213258592U
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- lining tile
- polishing
- fillet
- handle
- hub
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Abstract
The utility model discloses a grinding device for sink-cutting journal fillet of marine crankshaft, which fixes a polished rod on a machine tool, and a wheel hub is sleeved on the polished rod; one end of each handle is lapped outside the hub, the other end of one handle is fixed with the upper lining tile, and the other end of the other handle is fixed with the lower lining tile; a fastening rope sleeve is arranged in the middle of the two handles; one ends of the upper lining tile and the lower lining tile are connected through a rotating shaft, and the other ends of the upper lining tile and the lower lining tile are respectively provided with a corresponding flange and a corresponding groove; the polishing pressing blocks are respectively and fixedly arranged in the positioning grooves of the upper lining tile and the lower lining tile; the appearance of polishing briquetting imitates bent axle undercut journal fillet, and polishing briquetting surface liner emery cloth strip is impressed the emery cloth strip through the screw and is fastened in the recess of polishing briquetting. The utility model has the advantages that: the stability of the processing process of the crank shaft neck undercut shaft neck fillet is improved; the fillet is integrally polished, the polished amount of the fillet is uniform, the quality is stable, and the production efficiency is high.
Description
Technical Field
The utility model relates to the field of machinary, specifically a marine crankshaft's grinding device.
Background
Crankshafts are critical components in engines and are subjected to additional loads due to torsional vibrations in addition to gas pressure, inertial forces, centrifugal forces during operation. The factors such as rough surface processing and out-of-tolerance fillet size at the fillet part of the journal are easy to generate concentrated stress and cause fatigue damage to cause the fracture failure of the crankshaft, and the fatigue life of the crankshaft is shortened.
The smaller the transition fillet of the crankshaft is, the more obvious the stress concentration effect at the fillet part is, so the fillet radius must be increased, but the effective bearing length of the journal cylinder is shortened along with the increase of the fillet radius.
After a sunk journal fillet is turned, the surface of the fillet needs to be polished, the existing method is that a crankshaft is hung on a polishing machine tool, and the crankshaft rotates slowly along the center of a main shaft after two ends of the crankshaft are positioned and clamped; the hand-held pneumatic grinder drives the conical wheel and the thousand-impeller wheels with different diameters to be roughly polished, and then the thousand-impeller wheels with different diameters and thinner gravels are used for finish polishing; the cone pulley is fast at the longest wearing and tearing of polishing time at the awl point position of polishing in-process, and the cone pulley does not match with heavy cut journal fillet circular arc profile, and journal fillet profile easily is protruding because of the inhomogeneous formation of polishing volume, polishes once more and repaiies protruding position, has destroyed heavy cut journal fillet overall profile, causes the size discrepancy.
Disclosure of Invention
In order to solve the technical problem, the utility model aims to provide a grinding device for sink-cutting journal fillets of marine crankshafts, a polished rod is fixed on a machine tool, and a hub is sleeved on the polished rod in a penetrating way; one end of each handle is lapped outside the hub, the other end of one handle is fixed with the upper lining tile, and the other end of the other handle is fixed with the lower lining tile; a fastening rope sleeve is arranged in the middle of the two handles; the upper lining tile and the lower lining tile are semicircular, one ends of the upper lining tile and the lower lining tile are connected through a rotating shaft, and the other ends of the upper lining tile and the lower lining tile are respectively provided with a corresponding flange and a corresponding groove; the polishing pressing blocks are respectively and fixedly arranged in the positioning grooves of the upper lining tile and the lower lining tile, and 2 polishing pressing blocks are symmetrically distributed on the circumference at an angle of 180 degrees; the appearance of polishing briquetting imitates bent axle undercut journal fillet, and polishing briquetting surface liner emery cloth strip is impressed the emery cloth strip through the screw and is fastened in the recess of polishing briquetting.
The hub is arranged between the two handles.
The length of the handle is unequal, and the relatively long handle is abutted to the outer end of the hub.
The utility model has the advantages that: the stability of the processing process of the crank shaft neck undercut shaft neck fillet is improved; the fillet is integrally polished, the polished amount of the fillet is uniform, the quality is stable, and the production efficiency is high.
Drawings
FIG. 1 is a schematic view of the present invention in use;
FIG. 2 is a schematic view of the position A-A of FIG. 1;
FIG. 3 is a top view of FIG. 2;
FIG. 4 is a right side view of FIG. 2;
FIG. 5 is a schematic view of a polishing compact tracing a crankshaft undercut journal fillet.
Detailed Description
The utility model is described in detail with reference to the drawings, as shown in the figures, a polished rod 9 is fixed on a machine tool, a hub 8 is provided with a middle through hole, the hub 8 is sleeved on the polished rod through the through hole, and the outer edge of the hub is provided with a hub groove; one end of each of the two handles 6 is lapped outside the hub, the other end of one handle is fixed with the upper lining tile 5, and the other end of the other handle is fixed with the lower lining tile 10; a fastening rope sleeve 7 is arranged in the middle of the two handles; the lining comprises an upper lining tile 5 and a lower lining tile 10, wherein the upper lining tile 5 and the lower lining tile 10 are both semicircular, one ends of the upper lining tile 5 and the lower lining tile 10 are connected through a rotating shaft 11, and the other ends of the upper lining tile and the lower lining tile are respectively provided with a corresponding flange and a corresponding groove; the polishing pressing blocks 13 are respectively and fixedly arranged in the positioning grooves 16 of the upper lining tile and the lower lining tile, and 2 polishing pressing blocks are symmetrically distributed on the circumference at an angle of 180 degrees; the appearance of polishing briquetting 13 follows the shape of fillet 15 of crankshaft undercut journal 4, and polishing briquetting surface liner abrasive cloth strip 14 is pressed the abrasive cloth strip into the recess of polishing briquetting 13 through screw 12 and is fastened.
The hub is arranged between the two handles.
The length of the handle is unequal, and the relatively long handle is abutted to the outer end of the hub.
The utility model discloses a use method: the crankshaft 3 is fixed on the eccentric fixture 2, and two ends of the crankshaft are fixed with the machine tool spindle 1; the upper lining tile 5 and the lower lining tile 10 are opened and sleeved on the connecting rod journal, the upper lining tile 5 and the lower lining tile 10 are closed through the handle, the polishing pressing block 13 is aligned to the surface of the connecting rod counter-sunk journal through integral movement, the handle 6 is lapped on the hub 8 after the rope sleeve 7 is fastened, the hub 8 can move axially along the polished rod 9, the crankshaft and the polishing tiles rotate relatively, and the machine tool is started to integrally polish the round angle of the connecting rod counter-sunk journal 4.
Claims (3)
1. The utility model provides a grinding device that is used for marine bent axle undercut journal fillet which characterized in that: a polished rod is fixed on a machine tool, and a hub is sleeved on the polished rod in a penetrating manner; one end of each handle is lapped outside the hub, the other end of one handle is fixed with the upper lining tile, and the other end of the other handle is fixed with the lower lining tile; a fastening rope sleeve is arranged in the middle of the two handles; the upper lining tile and the lower lining tile are semicircular, one ends of the upper lining tile and the lower lining tile are connected through a rotating shaft, and the other ends of the upper lining tile and the lower lining tile are respectively provided with a corresponding flange and a corresponding groove; the polishing pressing blocks are respectively and fixedly arranged in the positioning grooves of the upper lining tile and the lower lining tile, and 2 polishing pressing blocks are symmetrically distributed on the circumference at an angle of 180 degrees; the appearance of polishing briquetting imitates bent axle undercut journal fillet, and polishing briquetting surface liner emery cloth strip is impressed the emery cloth strip through the screw and is fastened in the recess of polishing briquetting.
2. A grinding apparatus for sink cutting journal fillet for marine crankshafts according to claim 1, characterized in that: the hub is arranged between the two handles.
3. A grinding apparatus for sink cutting journal fillet for marine crankshafts according to claim 1, characterized in that: the length of the handle is unequal, and the relatively long handle is abutted to the outer end of the hub.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022083802.7U CN213258592U (en) | 2020-09-22 | 2020-09-22 | Grinding device for sink cutting journal fillet of marine crankshaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022083802.7U CN213258592U (en) | 2020-09-22 | 2020-09-22 | Grinding device for sink cutting journal fillet of marine crankshaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213258592U true CN213258592U (en) | 2021-05-25 |
Family
ID=75944307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022083802.7U Active CN213258592U (en) | 2020-09-22 | 2020-09-22 | Grinding device for sink cutting journal fillet of marine crankshaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213258592U (en) |
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2020
- 2020-09-22 CN CN202022083802.7U patent/CN213258592U/en active Active
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