CN215846125U - Hobbing clamp for small inner hole workpiece - Google Patents
Hobbing clamp for small inner hole workpiece Download PDFInfo
- Publication number
- CN215846125U CN215846125U CN202121761513.6U CN202121761513U CN215846125U CN 215846125 U CN215846125 U CN 215846125U CN 202121761513 U CN202121761513 U CN 202121761513U CN 215846125 U CN215846125 U CN 215846125U
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- expansion sleeve
- radial
- expansion
- workpiece
- limiting step
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Abstract
The utility model discloses a hobbing clamp for a small inner hole workpiece, which comprises a base, a body and a tip shaft which are connected, wherein the body is provided with an inner hole; the center shaft is fixedly connected with the expansion sleeve, the expansion sleeve is fixedly connected with the annular connecting seat, the connecting seat and the expansion sleeve are provided with a gland in a sliding manner in the radial direction, the radial inner side of the connecting seat is provided with a lower limiting step, and the radial outer side of the gland is provided with an upper limiting step matched with the lower limiting step; the lower end of the expansion sleeve is provided with a blind hole, the expansion sleeve corresponding to the middle section of the blind hole is provided with more than three axial cutting grooves, each axial cutting groove is uniformly distributed on the circumference, the expansion sleeve corresponding to the middle part of each axial cutting groove is provided with a radial expansion section, and the outer diameter of the radial expansion section is larger than that of the expansion sleeves on the upper side and the lower side of the radial expansion section; the utility model not only saves cost and improves work efficiency, but also has high centering precision and can improve processing precision.
Description
Technical Field
The utility model relates to a hobbing clamp, in particular to a hobbing clamp for a workpiece with a small inner hole.
Background
The existing hobbing clamp mostly adopts a pull rod to drive an elastic chuck to compress or expand a workpiece, and the pull rod needs to bear larger pulling force; the structure is applicable to workpieces with large inner holes, but for workpieces with small inner holes, the pull rod is thin and easy to break, and needs to be replaced frequently, so that the cost is increased, the processing efficiency is influenced, the clamping and centering precision of small-hole workpieces is poor, and the processing precision is influenced.
Disclosure of Invention
The utility model aims to provide a hobbing clamp for a small inner hole workpiece, which not only saves cost and improves work efficiency, but also has high centering precision and can improve processing precision aiming at the defects in the prior art.
In order to achieve the purpose, the hobbing clamp for the small inner hole workpiece comprises a base, a body and a tip shaft which are connected, wherein the body is provided with an inner hole; the device is characterized in that the center shaft is fixedly connected with the expansion sleeve, the expansion sleeve is fixedly connected with the annular connecting seat, the connecting seat and the expansion sleeve are provided with a gland in a sliding manner in the radial direction, the radial inner side of the connecting seat is provided with a lower limiting step, and the radial outer side of the gland is provided with an upper limiting step matched with the lower limiting step; the lower end of the expansion sleeve is provided with a blind hole, the expansion sleeve corresponding to the middle section of the blind hole is provided with more than three axial cutting grooves, each axial cutting groove is uniformly distributed on the circumference, the expansion sleeve corresponding to the middle part of each axial cutting groove is provided with a radial expansion section, and the outer diameter of the radial expansion section is larger than that of the expansion sleeves on the upper side and the lower side of the radial expansion section.
The blind hole and the axial cutting groove enable the outer diameter of the radial expansion section to be larger than that of the expansion sleeves on the upper side and the lower side of the radial expansion section, and elastic deformation can be generated; when the self-centering device is used, a workpiece is placed on the body, the center shaft moves downwards to push the expansion sleeve to move downwards, the lower end of the expansion sleeve penetrates through the workpiece, and the self-centering device can automatically center by means of interference fit of the radial expansion section and an inner hole of the workpiece and has high centering precision; after the gland automatically slides downwards and contacts with the end face of a workpiece, the expansion sleeve pushes the gland to compress the workpiece, and during return stroke, the lower limiting step pushes the gland to move upwards; the device has no easily damaged part, does not need to replace parts, not only saves cost and improves work efficiency, but also has high centering precision and can improve processing precision;
as a further improvement of the utility model, the base is provided with an inner hole, and a plug is connected in the inner hole of the body through threads; fine slag generated during processing can be collected in the inner hole of the body and intensively discharged;
as a further improvement of the utility model, the lower end of the expansion sleeve is provided with a chamfer; the workpiece can be conveniently penetrated;
in conclusion, the utility model not only saves cost and improves work efficiency, but also has high centering precision and can improve processing precision.
Drawings
FIG. 1 is a front view of an embodiment of the present invention.
Fig. 2 is a front view of the expansion sleeve of fig. 1.
Fig. 3 is a right side view of fig. 2.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1 to 3, the hobbing clamp for the workpiece with the small inner hole of the embodiment comprises a base 1, a body 2 and a tip shaft 3 which are connected, wherein the base 1 and the body 2 are both provided with inner holes, and a plug 4 is connected in the inner hole of the body 2 through threads; the center shaft 3 is fixedly connected with the expansion sleeve 5 through a bolt, the expansion sleeve 5 is fixedly connected with the annular connecting seat 6 through a screw, a gland 8 is arranged between the connecting seat 6 and the expansion sleeve 5 in a sliding mode in the radial direction, a lower limiting step 7 is arranged on the inner side of the connecting seat 6 in the radial direction, and an upper limiting step 9 matched with the lower limiting step 7 is arranged on the outer side of the gland 8 in the radial direction; the lower end of the expansion sleeve 5 is provided with a blind hole 10, the expansion sleeve 5 corresponding to the middle section of the blind hole 10 is provided with four axial cutting grooves 11, each axial cutting groove 11 is uniformly distributed on the circumference, the expansion sleeve 5 corresponding to the middle section of each axial cutting groove 11 is provided with a radial expansion section 12, the outer diameter of the radial expansion section 12 is larger than the outer diameter of the expansion sleeve 5 on the upper side and the lower side, and the lower end of the expansion sleeve 5 is provided with a chamfer 13.
The blind hole 10 and the axial cutting groove 11 are arranged, so that the outer diameter of the radial expansion section 12 can be larger than the outer diameter of the expansion sleeves 5 on the upper side and the lower side of the radial expansion section through extrusion, and elastic deformation can be generated; when the device is used, a push rod of a machine tool is connected with the center shaft 3, a workpiece 16 is placed on the body 2, the push rod of the machine tool drives the center shaft 3 to move downwards and pushes the expansion sleeve 5 to move downwards, the lower end of the expansion sleeve penetrates through an inner hole of the workpiece 16, and automatic centering can be achieved by means of interference fit of the radial expansion section 12 and the inner hole of the workpiece, and the centering precision is high; after the gland 8 automatically slides downwards by self weight and contacts with the end surface of the workpiece 16, the expansion sleeve 5 pushes the gland 8 to compress the workpiece 13; during return stroke, the gland 8 is still contacted with the end face of the workpiece 16 by self weight, and after the radial expansion section 12 is separated from the workpiece 16, the lower limiting step 7 and the upper limiting step 9 are matched to push the gland 8 to move upwards; the device has no easily damaged part, does not need to replace parts, not only saves cost and improves work efficiency, but also has high centering precision and can improve processing precision; the plug 4 can collect fine slag generated in processing into the inner hole of the body 2 and discharge the fine slag intensively; the chamfer 13 facilitates the passage of the expansion sleeve 5 through the workpiece 16.
Claims (3)
1. A hobbing clamp for a workpiece with a small inner hole comprises a base, a body and a tip shaft which are connected, wherein the body is provided with the inner hole; the device is characterized in that the center shaft is fixedly connected with the expansion sleeve, the expansion sleeve is fixedly connected with the annular connecting seat, the connecting seat and the expansion sleeve are provided with a gland in a sliding manner in the radial direction, the radial inner side of the connecting seat is provided with a lower limiting step, and the radial outer side of the gland is provided with an upper limiting step matched with the lower limiting step; the lower end of the expansion sleeve is provided with a blind hole, the expansion sleeve corresponding to the middle section of the blind hole is provided with more than three axial cutting grooves, each axial cutting groove is uniformly distributed on the circumference, the expansion sleeve corresponding to the middle part of each axial cutting groove is provided with a radial expansion section, and the outer diameter of the radial expansion section is larger than that of the expansion sleeves on the upper side and the lower side of the radial expansion section.
2. A small bore workpiece hobbing clamp as claimed in claim 1 wherein the base defines a bore and a plug is threadedly engaged in the bore of the body.
3. A small bore workpiece hobbing clamp as claimed in claim 1 or 2, wherein the lower end of the expansion sleeve is chamfered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121761513.6U CN215846125U (en) | 2021-07-30 | 2021-07-30 | Hobbing clamp for small inner hole workpiece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121761513.6U CN215846125U (en) | 2021-07-30 | 2021-07-30 | Hobbing clamp for small inner hole workpiece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215846125U true CN215846125U (en) | 2022-02-18 |
Family
ID=80328874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121761513.6U Active CN215846125U (en) | 2021-07-30 | 2021-07-30 | Hobbing clamp for small inner hole workpiece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215846125U (en) |
-
2021
- 2021-07-30 CN CN202121761513.6U patent/CN215846125U/en active Active
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