CN220260234U - Centre bore auxiliary positioning frock - Google Patents
Centre bore auxiliary positioning frock Download PDFInfo
- Publication number
- CN220260234U CN220260234U CN202321735728.XU CN202321735728U CN220260234U CN 220260234 U CN220260234 U CN 220260234U CN 202321735728 U CN202321735728 U CN 202321735728U CN 220260234 U CN220260234 U CN 220260234U
- Authority
- CN
- China
- Prior art keywords
- auxiliary sleeve
- auxiliary
- step shaft
- cylindrical part
- centre bore
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000004744 fabric Substances 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 abstract description 5
- 238000012958 reprocessing Methods 0.000 abstract description 4
- 238000004064 recycling Methods 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 238000012545 processing Methods 0.000 description 5
- 238000005498 polishing Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Abstract
The utility model provides a centre bore auxiliary positioning frock which characterized in that: including the auxiliary sleeve of symmetry dress on the little cylindrical part in step shaft both ends, the auxiliary sleeve is one end opening, the hollow cylindric structure of other end confined, open at auxiliary sleeve blind end middle part has the centre bore of axial extension, the centre bore with auxiliary sleeve coaxial setting, auxiliary sleeve opening end suit is on the little cylindrical part of step shaft, auxiliary sleeve opening end hole and the little cylindrical part clearance fit of step shaft, the outer wall ring cloth of auxiliary sleeve opening end has more than two radially extending screw holes, threaded hole threaded connection has and is used for the locating connection auxiliary sleeve and step shaft's adjusting screw, and adjusting screw top directly supports the step shaft, connects into a whole with step shaft and auxiliary sleeve. The method is suitable for reprocessing all parts with the central hole as a reference and damaged by the central hole, realizes the recycling of the parts, saves the cost and reduces the cost.
Description
Technical Field
The utility model relates to a machining tool, in particular to a center hole auxiliary positioning tool.
Background
In the processing of mechanical product parts, a center hole is generally used as a positioning reference. The central hole is divided into A type, B type and R type according to different structural types. Whichever type of central bore plays a critical role in the processing of the product.
In the process of processing, mounting or using parts, the central hole is damaged frequently, and the precision is deteriorated and the parts cannot be used. For example, the stepped shaft is used for steel plate processing equipment in the metallurgical industry, the largest cylindrical surface is contacted with the steel plate and used for transmitting the motion of the steel plate and straightening the steel plate, and the small cylindrical surfaces at the two ends are bearing positions and used for supporting the rotation. In operation, the large cylindrical surface is directly contacted with the steel plate and straightened, the stress is larger, and the steel plate is easy to wear. The large cylindrical surface of the stepped shaft needs to be polished for multiple times and reused. In the process of polishing, the shaft which is polished repeatedly is frequently encountered, the original center hole is damaged or eccentric in the process of transportation, installation or use, and the original center hole cannot be used as a reference for polishing again, so that difficulty is caused to processing.
Disclosure of Invention
The utility model aims to solve the defects of the prior art, thereby providing the auxiliary positioning tool for the central hole, which is applicable to the reprocessing of all parts taking the central hole as a reference and damaged by the central hole, realizes the recycling of the parts, saves the cost and reduces the cost.
The technical scheme of the utility model is as follows: the utility model provides a centre bore auxiliary positioning frock which characterized in that: including the auxiliary sleeve of symmetry dress on the little cylindrical part in step shaft both ends, the auxiliary sleeve is one end opening, the hollow cylindric structure of other end confined, open at auxiliary sleeve blind end middle part has the centre bore of axial extension, the centre bore with auxiliary sleeve coaxial setting, auxiliary sleeve opening end suit is on the little cylindrical part of step shaft, auxiliary sleeve opening end hole and the little cylindrical part clearance fit of step shaft, the outer wall ring cloth of auxiliary sleeve opening end has more than two radially extending screw holes, threaded hole threaded connection has and is used for the locating connection auxiliary sleeve and step shaft's adjusting screw, and adjusting screw top directly supports the step shaft, connects into a whole with step shaft and auxiliary sleeve.
The fit clearance between the inner hole at the opening end of the auxiliary sleeve and the small cylindrical part of the stepped shaft is 0.05-0.1 mm.
When the stepped shaft is connected with the auxiliary sleeve in a positioning way, the coaxiality of the center line of the small cylindrical part of the stepped shaft and the center line of the center hole on the auxiliary sleeve is not more than 0.01mm.
Four uniformly distributed threaded holes are formed in the opening end of the auxiliary sleeve along the circumference of the outer cylindrical surface, and an included angle between the centers of two adjacent threaded holes and a connecting line of the axis of the auxiliary sleeve is 90 degrees.
The utility model has the advantages that: the fixture disclosed by the utility model is ingenious in design, simple to operate, quick to clamp, suitable for reprocessing all parts taking the central hole as a reference and damaged by the central hole, capable of realizing the recycling of the parts, saving in cost and reducing in cost.
The utility model solves the problem that the center hole cannot be reused for reprocessing of parts taking the center hole as a reference.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a schematic diagram of the structure of the present utility model;
fig. 2 is a schematic view of an auxiliary sleeve, set screw.
In the figure: 1-1, a first central hole, 1-2, a second central hole, 2-1, a first auxiliary sleeve, 2-2, a second auxiliary sleeve, 3, an adjusting screw, 3-1, a first adjusting screw, 3-2, a second adjusting screw, 3-3, a third adjusting screw, 3-4, a fourth adjusting screw, 4-1, a first small cylindrical part, 4-2, a second small cylindrical part, 5 and a large cylindrical part.
Detailed Description
In fig. 1 and 2, the stepped shaft is composed of a large cylindrical portion 5, and a small cylindrical portion one 4-1 and a small cylindrical portion two 4-2 located at both ends of the large cylindrical portion 5. The auxiliary sleeve I2-1 and the auxiliary sleeve II 2-2 are hollow cylindrical structures with one end open and the other end closed, the centers of the end faces of the closed ends of the auxiliary sleeve I2-1 and the auxiliary sleeve II 2-2 are respectively provided with a central hole I1-1 and a central hole II 1-2, the open ends of the auxiliary sleeve I2-1 and the auxiliary sleeve II 2-2 are respectively uniformly distributed with 4 threaded holes along the circumference of the outer cylindrical surface, and the included angle between the centers of two adjacent threaded holes and the connecting line of the axis of the auxiliary sleeve is 90 degrees. The screw hole is internally connected with an adjusting screw used for positioning and connecting the auxiliary sleeve and the stepped shaft, the top end of the adjusting screw directly props against the stepped shaft, the stepped shaft and the auxiliary sleeve are connected into a whole, and after the stepped shaft is in positioning connection with the auxiliary sleeve, the coaxiality of the center line of the small cylindrical part of the stepped shaft and the center line of the center hole on the auxiliary sleeve is not more than 0.01mm.
The first auxiliary sleeve 2-1 and the second auxiliary sleeve 2-2 are respectively sleeved on the first small cylindrical part 4-1 and the second small cylindrical part 4-2 at the two ends of the stepped shaft, and are radially positioned by two groups of adjusting screw groups through 4 threaded holes in the auxiliary sleeve.
The first auxiliary sleeve 2-1 and the second auxiliary sleeve 2-2 are in clearance fit with the corresponding first small cylindrical part 4-1 and second small cylindrical part 4-2, and the fit clearance is 0.05 mm-0.1 mm.
The step shaft grinding process is as follows:
1) Manufacturing an auxiliary sleeve I2-1 and an auxiliary sleeve II 2-2 according to the diameters of a small cylindrical part I4-1 and a small cylindrical part II 4-2 of the stepped shaft, wherein a fit clearance is 0.05 mm-0.1 mm;
2) The first auxiliary sleeve 2-1 and the second auxiliary sleeve 2-2 are respectively arranged on the first small cylindrical part 4-1 and the second small cylindrical part 4-2 of the stepped shaft, and are initially pre-tightened from four directions by using the first adjusting screw 3-1, the second adjusting screw 3-2, the third adjusting screw 3-3 and the fourth adjusting screw 3-4;
3) The grinding machine is arranged, and the first 1-1 and the second 1-2 of the double-top central holes are used as references, and the first 1-1 and the second 1-2 of the central holes of the two auxiliary sleeves are used as references;
4) When the first adjusting screw 3-1, the second adjusting screw 3-2, the third adjusting screw 3-3 and the fourth adjusting screw 3-4 are respectively screwed in or out by taking the small cylindrical part I4-1 and the small cylindrical part II 4-2 of the stepped shaft as references, the first central hole 1-1 and the second central hole 1-2 can be finely adjusted in corresponding directions, and the coaxiality between the central lines of the first central hole 1-1, the second central hole 1-2 and the central lines of the first small cylindrical part 4-1 and the second small cylindrical part II 4-2 of the stepped shaft is adjusted to be within 0.01mm through the first adjusting screw 3-1, the second adjusting screw 3-2, the third adjusting screw 3-3 and the fourth adjusting screw 4-4;
5) And (5) grinding the large cylindrical surface 5 of the stepped shaft until the use requirement is met.
The foregoing is illustrative of the present utility model and is not to be construed as limiting thereof, but rather, any modification, equivalent replacement, improvement or the like which comes within the spirit and principles of the present utility model are intended to be included within the scope of the present utility model.
Claims (4)
1. The utility model provides a centre bore auxiliary positioning frock which characterized in that: including the auxiliary sleeve of symmetry dress on the little cylindrical part in step shaft both ends, the auxiliary sleeve is one end opening, the hollow cylindric structure of other end confined, open at auxiliary sleeve blind end middle part has the centre bore of axial extension, the centre bore with auxiliary sleeve coaxial setting, auxiliary sleeve opening end suit is on the little cylindrical part of step shaft, auxiliary sleeve opening end hole and the little cylindrical part clearance fit of step shaft, the outer wall ring cloth of auxiliary sleeve opening end has more than two radially extending screw holes, threaded hole threaded connection has and is used for the locating connection auxiliary sleeve and step shaft's adjusting screw, and adjusting screw top directly supports the step shaft, connects into a whole with step shaft and auxiliary sleeve.
2. The center hole auxiliary positioning tool according to claim 1, wherein: the fit clearance between the inner hole at the opening end of the auxiliary sleeve and the small cylindrical part of the stepped shaft is 0.05-0.1 mm.
3. The center hole auxiliary positioning tool according to claim 1, wherein: when the stepped shaft is connected with the auxiliary sleeve in a positioning way, the coaxiality of the center line of the small cylindrical part of the stepped shaft and the center line of the center hole on the auxiliary sleeve is not more than 0.01mm.
4. The center hole auxiliary positioning tool according to claim 1, wherein: four uniformly distributed threaded holes are formed in the opening end of the auxiliary sleeve along the circumference of the outer cylindrical surface, and an included angle between the centers of two adjacent threaded holes and a connecting line of the axis of the auxiliary sleeve is 90 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321735728.XU CN220260234U (en) | 2023-07-04 | 2023-07-04 | Centre bore auxiliary positioning frock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321735728.XU CN220260234U (en) | 2023-07-04 | 2023-07-04 | Centre bore auxiliary positioning frock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220260234U true CN220260234U (en) | 2023-12-29 |
Family
ID=89303868
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321735728.XU Active CN220260234U (en) | 2023-07-04 | 2023-07-04 | Centre bore auxiliary positioning frock |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220260234U (en) |
-
2023
- 2023-07-04 CN CN202321735728.XU patent/CN220260234U/en active Active
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