CN222344395U - A fixture for the inner bearing surface of a cemented carbide rolling cutter - Google Patents
A fixture for the inner bearing surface of a cemented carbide rolling cutter Download PDFInfo
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- CN222344395U CN222344395U CN202420278668.1U CN202420278668U CN222344395U CN 222344395 U CN222344395 U CN 222344395U CN 202420278668 U CN202420278668 U CN 202420278668U CN 222344395 U CN222344395 U CN 222344395U
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- cylinder
- rolling cutter
- bearing surface
- inner bearing
- positioning
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- 238000005096 rolling process Methods 0.000 title claims abstract description 51
- 239000000956 alloy Substances 0.000 claims abstract description 11
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 11
- 230000007246 mechanism Effects 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000003754 machining Methods 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract 1
- 238000005520 cutting process Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000007514 turning Methods 0.000 description 1
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Abstract
The utility model discloses an inner bearing surface clamp of a hard alloy rolling cutter, which comprises a step-shaped mandrel, a screw, a set of through holes, a set of positioning holes, a rolling cutter and a clamp, wherein one end of the mandrel is provided with a positioning core part, the center of the positioning core part is provided with a connecting screw hole, the screw comprises a threaded connecting part, a nut is arranged on the threaded connecting part, one end of the nut, which is far away from the threads, is provided with a conical cap peak for locking, the nut is provided with a set of through holes which are annularly arranged around a central shaft, the inner hole of the rolling cutter is positioned by the screw through the conical cap peak, and the rolling cutter is completely positioned by utilizing a limited positioning space, so that the tolerance requirements on the shape and the position of the inner bearing surface of the rolling cutter can be ensured, the rolling cutter is high in installation precision and accurate in positioning, the machining precision is greatly improved, the product quality is ensured, and the clamp is simple in structure, convenient to operate and reliable in positioning.
Description
Technical Field
The utility model relates to the technical field of gear manufacturing, in particular to an inner bearing surface clamp of a hard alloy rolling slotting tool.
Background
Gears are the most common component in the mechanical field, and many machines will not work without gears. The tooth form processing method of the gear is one of key steps in the gear processing technology, and the gear processing technology comprises two main types of chipless processing and cutting processing;
The rolling slotting cutter (rolling slotting cutter is also called a turning gear cutter) is a continuous deflection gear with a front angle and a rear angle, each section perpendicular to the axis of the rolling slotting cutter has different deflection coefficients, a top circle diameter and tooth thickness, and the rolling slotting cutter only has a gear theoretical value with the same modulus on an original section with the deflection coefficient of zero;
The flatness of the inner bearing surface of the hard alloy rolling cutter is required to be 0.003mm, the runout of the end surface is 0.002mm, the parallelism requirement with the outer bearing surface is 0.002mm, the cutting machining cannot meet the precision requirement, the grinding machining is generally required, the outer bearing surface is used as a positioning reference for grinding the inner bearing surface, the outer teeth of the rolling cutter are preformed before being ground, the outer teeth cannot be directly clamped during grinding to avoid damaging the outer teeth during grinding, and therefore the outer teeth of the rolling cutter are required to be avoided during positioning and clamping, the outer bearing surface and the inner hole of the rolling cutter can only be positioned, and the 45-degree chamfer surface of the inner hole is used as a clamping surface for grinding the inner bearing surface.
Disclosure of utility model
The utility model aims to solve the technical problems, and provides a hard alloy rolling cutter inner bearing surface clamp which is used for positioning an inner hole of a rolling cutter by using a conical cap peak through a screw and reasonably utilizing a limited positioning space to completely position the rolling cutter.
In order to achieve the aim, the utility model adopts the following technical scheme that the hard alloy rolling cutter inner bearing surface clamp comprises a step-shaped mandrel, wherein one end of the mandrel is provided with a positioning core part, and the center of the positioning core part is provided with a connecting screw hole;
The screw comprises a threaded connecting portion, a nut is arranged on the threaded connecting portion, one end, far away from the threads, of the nut is provided with a conical cap peak for locking, and a group of through holes which are arranged around a central shaft in an annular array are formed in the nut.
Further preferable technical scheme is that the mandrel is provided with a first cylinder, one end of the first cylinder is provided with a second cylinder, the first cylinder is coaxial with the second cylinder, the diameter of the second cylinder is larger than that of the first cylinder, the positioning core is arranged at one end, far away from the first cylinder, of the second cylinder, and a cutter retracting groove is formed in the position, close to the second cylinder, of the positioning core.
In order to facilitate the workpiece to be removed from the positioning core after finishing the processing, a further preferred technical scheme is that a group of annularly arranged ejection mechanisms are arranged on the second cylinder and face the workpiece.
Further preferable technical scheme is that the ejection mechanism comprises a stepped hole arranged on the second cylinder, a stepped piston is arranged in the stepped hole, and a group of piston rings which are axially arranged are arranged on the peripheral surface of one end of the piston, which is far away from the workpiece, and are in sliding sealing fit with the stepped hole.
Further preferable technical scheme is that one end of the stepped hole on the mandrel far away from the machined part is provided with a pipe thread.
Compared with the prior art, the fixture has the beneficial effects that the inner hole of the rolling cutter is positioned by utilizing the conical cap peak through the screw, the limited positioning space is reasonably utilized, and the rolling cutter is completely positioned, so that the tolerance requirements of the shape and the position of the bearing surface in the rolling cutter can be ensured, meanwhile, the mounting precision of the rolling cutter is high, the positioning is correct, the processing precision is greatly improved, the product quality is ensured, and the fixture has the advantages of simple structure, convenience in operation and reliability in positioning.
Drawings
FIG. 1 is a front view of the present utility model;
FIG. 2 is a front view of a mandrel of the present utility model;
FIG. 3 is a front view of the screw of the present utility model;
FIG. 4 is a right side view of the screw of the present utility model;
FIG. 5 is a front view of an ejector mechanism of the present utility model;
10 parts of a mandrel, 11 parts of a first cylinder, 12 parts of a second cylinder, 13 parts of a positioning core, 20 parts of screws, 21 parts of a threaded connection part, 22 parts of a nut, 23 parts of a cap peak, 24 parts of a through hole, 30 parts of a roll-in cutter, 40 parts of an ejection mechanism, 41 parts of a piston and 42 parts of a piston ring.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.
Examples
As shown in fig. 1, the flatness of the bearing surface in the cemented carbide rolling cutter is required to be 0.003mm, the runout of the end surface is 0.002mm, the cutting process cannot meet the precision requirement, and grinding process is generally required, and the external teeth of the rolling cutter 30 are prevented from being knocked to damage the tooth shape during grinding and clamping, so that the external teeth of the rolling cutter 30 are avoided during positioning and clamping, the positioning can only be carried out from two ends of the rolling cutter 30, and the positioning space is limited;
The application provides a clamp, as shown in fig. 2, the clamp comprises a mandrel 10, wherein the mandrel 10 is in a ladder shape, the mandrel 10 is provided with a first cylinder 11, the roundness of the first cylinder is not more than 0.002mm, the runout is not more than 0.0015mm, one end of the first cylinder 11 is provided with a second cylinder 12, the first cylinder 11 and the second cylinder 12 are coaxial, the diameter of the second cylinder 12 is larger than that of the first cylinder 11, one end of the second cylinder 12 far away from the first cylinder 11 is provided with a positioning core 13, one end of the positioning core 13 far away from the second cylinder 12 is provided with a chamfer, the taper of the chamfer is less than 5 degrees, the positioning core 13 is coaxial with both the first cylinder 11 and the second cylinder 12, the diameter of the positioning core 13 is larger than the diameter of the first cylinder 11, one end of the positioning core 13 near the second cylinder 12 is provided with a clearance groove, the end surface roughness of the end surface of the second cylinder 12 near the positioning core 13 is not more than 0.4um, the runout is not more than 0.002mm, the end surface of the positioning core 13 near the second cylinder 12 is not more than 6.0016 mm, and the positioning core is not more than 6mm;
As shown in fig. 3-4, the device further comprises a screw 20, the screw 20 is in threaded connection with the mandrel 10 through a connecting screw hole of the positioning core 13, the screw 20 comprises a threaded connection part 21, a nut 22 is arranged on the threaded connection part 21, one end of the nut 22, which is far away from the threaded connection part 21, is provided with a conical cap peak 23 for locking, and a group of through holes 24 are arranged on the nut 22 in an annular array around a central shaft;
As shown in fig. 1, when in use, the rolling cutter 30 is mounted on the positioning core 13, one end of the rolling cutter 30 is abutted against the end face of the second cylinder 12, then the screw 20 is mounted on the mandrel 10, then the screw 20 is inserted into the through hole 24 through a tool to rotate, the screw 20 is locked, the cap peak 23 is abutted against the outer chamfer of the inner hole of the rolling cutter 30, and when in complete locking, the outer end face of the cap peak 23 is positioned in the inner hole of the rolling cutter 30 and is lower than the inner bearing face of the rolling cutter 30, so that the inner bearing face of the rolling cutter 30 is completely exposed outside to facilitate grinding, the screw 20 clamps the outer chamfer of the inner hole of the rolling cutter 30 through the tapered cap peak 23, the limited positioning space is reasonably utilized, the rolling cutter 30 is completely positioned, thus the tolerance requirements of the shape and the position of the inner bearing face of the rolling cutter 30 can be ensured, the rolling cutter 30 is high in mounting precision and accurate positioning, the product quality is greatly improved, and the clamp is simple in structure and reliable and convenient to position;
As shown in fig. 5, the dimensional accuracy of the inner hole of the rolling cutter 30 and the outer diameter of the positioning core 13 is higher, in order to facilitate the rolling cutter 30 to be removed from the positioning core 13 after finishing processing, and to prevent the phenomenon that the dimensional accuracy is knocked due to unbalance of force during manual disassembly in repeated clamping, further, a set of annular ejection mechanisms 40 are disposed on the second cylinder 12 and face the rolling cutter 30, and in this embodiment, two or three sets of symmetrically disposed ejection mechanisms 40 may be disposed according to the size of the mandrel 10.
Further, in this embodiment, a preferred pneumatic ejection structure is provided, and of course, a hydraulic ejection structure may be also used, and the pneumatic ejection mechanism 40 includes a stepped hole provided on the second cylinder 12, a stepped piston 41 is provided in the stepped hole, and a set of piston rings 42 provided along an axial direction are provided on an outer peripheral surface of an end of the piston 41 away from the rolling cutter 30 and are in sliding sealing fit with the stepped hole.
Further, a pipe thread is provided at one end of the stepped hole on the mandrel 10 far away from the rolling cutter 30, the high pressure air inlet pipe is in sealing connection with the stepped hole through the pipe thread, then high pressure air is introduced, the high pressure air drives the piston 41 to be ejected out of the stepped hole, the rolling cutter 30 is ejected out of the positioning core 13, and the ejection mechanism 40 is uniformly arranged in a ring shape, so that the rolling cutter 30 is subjected to uniform axial ejection force, and collision caused by force imbalance during manual disassembly is avoided.
The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.
Claims (5)
1. The inner bearing surface clamp of the hard alloy rolling slotting tool is characterized by comprising a step-shaped mandrel, wherein one end of the mandrel is provided with a positioning core part, and the center of the positioning core part is provided with a connecting screw hole;
The screw comprises a threaded connecting portion, a nut is arranged on the threaded connecting portion, one end, far away from the threads, of the nut is provided with a conical cap peak for locking, and a group of through holes which are arranged around a central shaft in an annular array are formed in the nut.
2. The hard alloy rolling cutter inner bearing surface clamp according to claim 1, wherein the mandrel is provided with a first cylinder, one end of the first cylinder is provided with a second cylinder, the first cylinder is coaxial with the second cylinder, the diameter of the second cylinder is larger than that of the first cylinder, the positioning core is arranged at one end, far away from the first cylinder, of the second cylinder, and a cutter withdrawal groove is formed in the position, close to the second cylinder, of the positioning core.
3. The hard alloy rolling cutter inner bearing surface clamp according to claim 2, wherein a group of annularly arranged ejection mechanisms are arranged on the second cylinder and face the workpiece.
4. The hard alloy rolling tool inner bearing surface clamp according to claim 3, wherein the ejection mechanism comprises a stepped hole formed in the second cylinder, a stepped piston is arranged in the stepped hole, and a group of piston rings arranged along the axial direction are arranged on the outer peripheral surface of one end of the piston away from a workpiece and are in sliding sealing fit with the stepped hole.
5. The hard alloy rolling cutter inner bearing surface clamp according to claim 4, wherein the stepped hole on the mandrel is provided with a pipe thread at one end far away from the workpiece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420278668.1U CN222344395U (en) | 2024-02-02 | 2024-02-02 | A fixture for the inner bearing surface of a cemented carbide rolling cutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420278668.1U CN222344395U (en) | 2024-02-02 | 2024-02-02 | A fixture for the inner bearing surface of a cemented carbide rolling cutter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222344395U true CN222344395U (en) | 2025-01-14 |
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ID=94193662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202420278668.1U Active CN222344395U (en) | 2024-02-02 | 2024-02-02 | A fixture for the inner bearing surface of a cemented carbide rolling cutter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN222344395U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120262816A (en) * | 2025-05-07 | 2025-07-04 | 东莞市起源自动化科技有限公司 | A motor housing and magnetic ring assembly device |
-
2024
- 2024-02-02 CN CN202420278668.1U patent/CN222344395U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120262816A (en) * | 2025-05-07 | 2025-07-04 | 东莞市起源自动化科技有限公司 | A motor housing and magnetic ring assembly device |
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