CN210937212U - Clamping mechanism for turning outer circle of hollow slender pipe fitting - Google Patents
Clamping mechanism for turning outer circle of hollow slender pipe fitting Download PDFInfo
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- CN210937212U CN210937212U CN201922183011.9U CN201922183011U CN210937212U CN 210937212 U CN210937212 U CN 210937212U CN 201922183011 U CN201922183011 U CN 201922183011U CN 210937212 U CN210937212 U CN 210937212U
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- elastic expansion
- pipe fitting
- clamping mechanism
- expansion body
- mandrel
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Abstract
The utility model discloses a clamping mechanism of hollow slender pipe fitting excircle lathe work, including two top, one of them is top to be fixed on the lathe tailstock, another top is fixed on lathe main rotation axis, still include the dabber, the both ends of dabber all are equipped with elasticity cover structure that rises, two top front portions all establish to rise to open the structure with elasticity cover structure matched with that rises, elasticity rises to overlap the structure and includes the elastic expansion body that sets up along the outside extension of dabber tip periphery axial, evenly be provided with axial open slot formation a plurality of elasticity inflation units on the elastic expansion body, every elasticity inflation unit is including the elastic connection section that connects gradually, the transitional coupling section, the inflation piece, the outer face of cylinder of inflation piece constitutes the binding face with the tubule inner wall, the interior conical surface structure of inflation piece constitutes top binding face. The utility model discloses a both ends hole circumference rises and tightly has eliminated the positioning gap of dabber and pipe fitting hole, has improved the axiality of work piece excircle and hole, has reduced and has pressed from both sides tight deformation, has improved clamping efficiency.
Description
Technical Field
The utility model discloses pipe fitting excircle lathe work technical field, concretely relates to clamping mechanism of hollow slender pipe fitting excircle lathe work.
Background
For a slender hollow pipe fitting, when the outer circle turning machining needs to be carried out by positioning and clamping an inner hole of the pipe fitting, the current tool adopts a design mode that a mandrel and the pipe fitting are positioned in a clearance mode to penetrate through the pipe fitting, and then the end face of the pipe fitting is pressed tightly.
In the process of implementing the present invention, the inventor finds that there are at least the following problems in the actual processing:
firstly, the inner hole of the pipe fitting is in clearance fit with the mandrel, and the concentricity error between the outer circle of the pipe fitting and the inner hole of the pipe fitting is larger after the outer circle of the pipe fitting is machined;
secondly, the end face is adopted for pressing, so that clamping deformation is easy to generate, and the machining precision is influenced;
thirdly, the positioning and clamping are divided into two actions, and the clamping efficiency is lower.
Disclosure of Invention
In order to solve the problem that the concentricity error of pipe fitting excircle processing back and pipe fitting hole is great, the tight deformation precision of clamp is not high, efficient low, the utility model provides a clamping mechanism of hollow slender pipe fitting excircle lathe work.
Therefore, the technical scheme of the utility model is that: the utility model provides a clamping mechanism of hollow slender pipe fitting excircle lathe work, includes two top, and one of them is top to be fixed on the tailstock of lathe, and another top is fixed on the main rotating shaft of lathe, still includes the dabber, its characterized in that:
the two ends of the mandrel are provided with elastic expansion sleeve structures with outward openings, and the front parts of the two apexes are provided with expansion structures matched with the elastic expansion sleeve structures.
Preferably, the elastic expansion sleeve structure and the mandrel are of an integrated structure.
Preferably, the elastic expansion sleeve structure comprises an elastic expansion body axially extending along two ends of the mandrel, axial opening deformation grooves are uniformly distributed on the elastic expansion body, the front end of the elastic expansion body is of an outer cylindrical inner conical surface structure, the cylindrical outer diameter of the elastic expansion body is larger than the outer diameter of the mandrel, and the front end of the tip is of an outer conical surface structure matched with the inner conical surface of the elastic expansion body.
Preferably, the taper angle of the inner tapered surface at the front end of the elastically expandable body is 20 °, and the taper angle of the outer tapered surface at the front end of the corresponding tip is 20 °.
Preferably, the groove bottom of the axial opening deformation groove is provided with a circular hole.
Has the advantages that: compared with the prior art, the utility model discloses have:
firstly, the positioning clearance between the mandrel and the inner hole of the pipe fitting is eliminated, and the coaxiality of the excircle and the inner hole of the workpiece is improved; the inner holes at two ends are circumferentially tensioned, so that the clamping deformation is reduced compared with the axial compression in the prior art; thirdly, only one moving action of the tailstock is needed to realize the functions of positioning and clamping, and the clamping efficiency is improved.
The elastic expansion sleeve structure and the mandrel are of an integrated structure, so that the space volume of the mandrel is greatly reduced, and the elastic expansion sleeve structure can be suitable for narrow hollow pipe fitting inner hole space;
the outer part of the front end of the elastic expansion body is cylindrical, so that the contact area with the hollow tubule can be increased, the friction force is increased, and the deformation of the tubule is effectively prevented; the inner part is provided with an inner conical surface matched with the tip so as to ensure uniform stress; the cone angle is set to be 20 degrees, so that the mandrel and the center of the main shaft are prevented from being self-locked while the reliable positioning precision and the reliable tensioning are ensured, and the assembly and disassembly are more convenient;
the bottom of the axial open slot is provided with a circular hole structure, so that the processing is convenient, the connection strength of the elastic expansion body and the mandrel can be ensured, and the service life is prolonged; meanwhile, the flexibility of the elastic expansion body can be improved, and the deformation degree is enhanced.
Drawings
Fig. 1 is a structural view of the present invention.
Fig. 2 is an enlarged view of a in fig. 1.
Fig. 3 is a first perspective view of the mandrel of the present invention.
Fig. 4 is a sectional front view of fig. 3.
Fig. 5 is a second perspective view of the mandrel of the present invention.
Shown in the figure: 1. a tip; 2. a mandrel; 3. an elastic expansion body; 4. axially opening the deformation groove; 4-1, a circular hole; 5. a hollow elongate tube member.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings, but the embodiment should not be construed as limiting the present invention.
The utility model discloses as shown in fig. 1 to 5:
a clamping mechanism for turning the excircle of a hollow slender pipe fitting comprises two centers 1, wherein one center is fixed on a tailstock of a machine tool, the other center is fixed on a main rotating shaft of the machine tool, the clamping mechanism also comprises a mandrel 2, two ends of the mandrel are respectively provided with an elastic expansion sleeve structure, the elastic expansion sleeve structure and the mandrel are of an integrated structure, and the front parts of the two centers are respectively provided with an expansion structure matched with the elastic expansion sleeve structure;
the elastic expansion sleeve structure comprises elastic expansion bodies 3 which extend axially along two ends of a mandrel, axial opening deformation grooves 4 are uniformly distributed on the elastic expansion bodies, the bottoms of the axial opening deformation grooves are provided with circular holes 4-1 (communicated with the grooves), the front ends of the elastic expansion bodies are provided with outer cylindrical structures and inner conical surface structures, the outer diameter of the cylindrical structures is larger than that of the mandrel, and the front ends of the apexes 1 are provided with outer conical surface structures matched with the inner conical surfaces of the elastic expansion bodies;
the cone angle of the inner conical surface at the front end of the elastic expansion body is 20 degrees, the cone angle of the corresponding outer conical surface at the front end of the center is 20 degrees, and the arrangement ensures reliable positioning precision and reliable tensioning, avoids the core shaft and the center of the main shaft from being self-locked and is convenient to assemble and disassemble.
The utility model discloses a theory of operation:
when the tailstock moves forward, the core shaft 2 and the two ends of the inner hole of the hollow slender pipe fitting 5 can be positioned and tensioned without a gap, and the working efficiency is improved.
Those skilled in the art will appreciate that the details of the present invention are not described in detail herein.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (6)
1. The utility model provides a clamping mechanism of hollow slender pipe fitting excircle lathe work, includes two top, and one of them is top to be fixed on the tailstock of lathe, and another top is fixed on the main rotating shaft of lathe, still includes the dabber, its characterized in that:
the two ends of the mandrel are provided with elastic expansion sleeve structures with outward openings, and the front parts of the two apexes are provided with expansion structures matched with the elastic expansion sleeve structures.
2. The clamping mechanism for cylindrical turning of the hollow slender pipe fitting of claim 1, wherein: the elastic expansion sleeve structure and the mandrel are of an integrated structure.
3. The clamping mechanism for cylindrical turning of the hollow slender pipe fitting according to claim 1 or 2, characterized in that: the elastic expansion sleeve structure comprises an elastic expansion body axially extending along two ends of the mandrel, axial opening deformation grooves are uniformly distributed on the elastic expansion body, the front end of the elastic expansion body is of an outer cylindrical inner conical surface structure, the cylindrical outer diameter of the elastic expansion body is larger than the outer diameter of the mandrel, and the front end of the tip is of an outer conical surface structure matched with the inner conical surface of the elastic expansion body.
4. The clamping mechanism for cylindrical turning of the hollow elongated pipe fitting of claim 3, wherein: the cone angle of the inner conical surface at the front end of the elastic expansion body is 20 degrees, and the cone angle of the corresponding outer conical surface at the front end of the tip is 20 degrees.
5. The clamping mechanism for cylindrical turning of the hollow elongated pipe fitting of claim 3, wherein: the groove bottom of the axial opening deformation groove is provided with a circular hole.
6. The clamping mechanism for cylindrical turning of the hollow elongated pipe fitting of claim 4, wherein: the groove bottom of the axial opening deformation groove is provided with a circular hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922183011.9U CN210937212U (en) | 2019-12-09 | 2019-12-09 | Clamping mechanism for turning outer circle of hollow slender pipe fitting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922183011.9U CN210937212U (en) | 2019-12-09 | 2019-12-09 | Clamping mechanism for turning outer circle of hollow slender pipe fitting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210937212U true CN210937212U (en) | 2020-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922183011.9U Active CN210937212U (en) | 2019-12-09 | 2019-12-09 | Clamping mechanism for turning outer circle of hollow slender pipe fitting |
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| CN (1) | CN210937212U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112658763A (en) * | 2020-12-30 | 2021-04-16 | 四川明日宇航工业有限责任公司 | Machining method for thin-wall long pipe casting |
-
2019
- 2019-12-09 CN CN201922183011.9U patent/CN210937212U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112658763A (en) * | 2020-12-30 | 2021-04-16 | 四川明日宇航工业有限责任公司 | Machining method for thin-wall long pipe casting |
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