CN214684325U - Quick-change expansion mandrel - Google Patents
Quick-change expansion mandrel Download PDFInfo
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- CN214684325U CN214684325U CN202120030043.XU CN202120030043U CN214684325U CN 214684325 U CN214684325 U CN 214684325U CN 202120030043 U CN202120030043 U CN 202120030043U CN 214684325 U CN214684325 U CN 214684325U
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- mandrel
- main body
- expansion
- quick
- mandrel main
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Abstract
The utility model discloses a quick-change expansion mandrel, which comprises a mandrel main body, wherein the front end of the mandrel main body is provided with a taper sleeve, expansion sleeves are arranged at the front end of the mandrel main body and outside the taper sleeve and are symmetrically arranged, a pull rod is arranged in the mandrel main body, a plurality of steps are arranged on the mandrel main body, the steps comprise a first step, a second step, a third step, a fourth step and a fifth step, the first step is provided with a chute, the second step is provided with a first taper surface and a workpiece positioning surface, the fourth step is provided with a first thread, the fifth step is provided with a positioning ring, the front end of the taper sleeve is provided with a second taper surface, the taper sleeve is sleeved on the first ladder in a sliding mode, expansion pieces are arranged on the expansion sleeve, and expansion grooves are formed among the expansion pieces. The utility model discloses, can quick replacement, the quick clamping work piece, simple structure, convenient operation.
Description
Technical Field
The utility model relates to a machining device technical field, concretely relates to quick change expansion core axle.
Background
In the aspect of mechanical design and processing, in order to improve the strength of parts, an auxiliary structure and a main structure are usually designed into a whole, so that the mechanical processing is invisibly difficult. In the process of mass production, in order to save raw materials, the blank allowance of the workpiece to be processed is small, the excircle cannot be clamped by a machine tool, or the workpiece to be processed has a thin wall thickness, and the clamped excircle is easy to cause workpiece deformation. If a traditional V-shaped clamping mode is adopted, the machining efficiency is greatly reduced; if an expansion mandrel clamping mode is adopted, the problem of product quality caused by inaccurate positioning reference can be caused, and in addition, the manufacturing error of the clamp can also influence the product quality. In the engineering of production processing cylinder barrel, the different inflation dabber of unidimensional cylinder needs, and speed is slow when traditional dabber is changed, operates inconveniently.
Therefore, in order to solve the above problems, there is a need for an expansion mandrel capable of being replaced quickly, capable of clamping workpieces quickly, simple in structure and convenient to operate.
SUMMERY OF THE UTILITY MODEL
To the not enough of above-mentioned prior art, the utility model aims to solve the technical problem that: how to provide a quick change expansion core axle that can quick replacement, the quick clamping work piece, simple structure, convenient operation.
In order to solve the technical problem, the utility model discloses a following technical scheme:
a quick-change expansion mandrel comprises a mandrel main body, wherein the mandrel main body is hollow, a taper sleeve is arranged at the front end of the mandrel main body, expansion sleeves are arranged at the front end of the mandrel main body and outside the taper sleeve, the expansion sleeves are symmetrically arranged, a pull rod is arranged in the mandrel main body, the mandrel main body is a stepped shaft, a plurality of steps are arranged on the mandrel main body and comprise a first step, a second step, a third step, a fourth step and a fifth step, a sliding groove is arranged on the first step, a first taper surface and a workpiece positioning surface are arranged on the second step, a first thread is arranged on the fourth step, a positioning ring is arranged on the fifth step, the tail of the mandrel main body is in a truncated cone arrangement, a second taper surface is arranged at the front end of the taper sleeve, and the taper sleeve is slidably sleeved on the first step, the front end of the pull rod is provided with a pull hole and a threaded hole, the rear end of the pull rod is provided with a second thread, the expansion sleeve is provided with expansion pieces, and expansion grooves are formed between the expansion pieces.
Like this, the tapering cover that sets up through sliding can make the inflation cover inflation with the first tapering face on the second step to the tight work piece hole in top, through dabber main part pull rod pulling tapering cover, make the tapering cover can slide on first step, the position of work piece can be confirmed to the work piece locating surface, thereby the exact is processed the work piece, utilizes first screw thread, will the utility model discloses connect on the workstation, the dabber main part afterbody and the holding ring that the circular truncated cone set up can make quick installation location, utilize the second screw thread of pull rod rear end, connect the pneumatic cylinder in pull rod and the workstation.
Furthermore, the taper sleeve is provided with a through hole corresponding to the sliding groove. And a connecting shaft is arranged through the through hole to connect the taper sleeve with the pull rod.
Furthermore, connecting shafts are arranged in the through holes and the pull holes, and the connecting shafts are fixedly connected to the pull rods through the threaded holes by bolts. The taper sleeve and the pull rod are fixedly connected through the connecting shaft, and the taper sleeve can slide when the pull rod is pulled.
Further, the expansion sheet is arranged corresponding to the first taper surface and the second taper surface. The expansion sheet is arranged on the taper surface, and when the expansion sheet moves relatively, the expansion sheet can be expanded, so that the workpiece is clamped.
Further, the tail of the mandrel main body is provided with a chamfer. Through the chamfer, can play the guide effect when the installation, can also prevent the scratch.
Further, a stepped hole is formed in the mandrel main body. The pull rod can be prevented from falling off by utilizing the stepped hole.
To sum up, the utility model discloses change that can be better, the tight work piece of quick clamp, simple structure, convenient operation.
Drawings
Fig. 1 is a schematic structural view of a quick-change expansion mandrel according to an embodiment of the present invention.
Fig. 2 is a schematic structural view of fig. 1 with parts of components removed.
Fig. 3 is a schematic view of fig. 2 with parts broken away.
Fig. 4 is a schematic structural view of the tie rod.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
In specific implementation, as shown in fig. 1-4, a quick-change expansion mandrel comprises a mandrel main body 1, the mandrel main body 1 is hollow, a taper sleeve 2 is arranged at the front end of the mandrel main body 1, expansion sleeves 3 are arranged at the front end of the mandrel main body 1 and outside the taper sleeve 2, the expansion sleeves 3 are symmetrically arranged, a pull rod 4 is arranged in the mandrel main body 1, the mandrel main body 1 is a stepped shaft, a plurality of steps are arranged on the mandrel main body 1, the steps comprise a first step 5, a second step 6, a third step 7, a fourth step 8 and a fifth step 9, a chute 10 is arranged on the first step 5, a first taper surface 11 and a workpiece positioning surface 12 are arranged on the second step 6, a first thread 13 is arranged on the fourth step 8, a positioning ring 14 is arranged on the fifth step 9, the tail of the mandrel main body 1 is in a conical frustum arrangement, the front end of tapering cover 2 is provided with second taper surface 15, tapering cover 2 slides and cup joints on the first ladder 5, the front end of pull rod 4 is provided with trompil 16 and screw hole 17, the rear end of pull rod 4 is provided with second screw 18, be provided with a plurality of inflation pieces 19 on the inflation cover 3, be provided with expansion groove 20 between the inflation piece 19. Like this, the tapering cover that sets up through sliding can make the inflation cover inflation with the first tapering face on the second step to the tight work piece hole in top, through dabber main part pull rod pulling tapering cover, make the tapering cover can slide on first step, the position of work piece can be confirmed to the work piece locating surface, thereby the exact is processed the work piece, utilizes first screw thread, will the utility model discloses connect on the workstation, the dabber main part afterbody and the holding ring that the circular truncated cone set up can make quick installation location, utilize the second screw thread of pull rod rear end, connect the pneumatic cylinder in pull rod and the workstation.
In this embodiment, the taper sleeve 2 is provided with a through hole 22 corresponding to the sliding groove 10.
In this embodiment, a connecting shaft 23 is disposed in the through hole 22 and the pull hole 16, and the connecting shaft 23 is fixedly connected to the pull rod 4 through the threaded hole 17 by a bolt.
In this embodiment, the expansion sheet 19 is disposed corresponding to the first taper surface 11 and the second taper surface 15. The expansion sheet is arranged on the taper surface, and when the expansion sheet moves relatively, the expansion sheet can be expanded, so that the workpiece is clamped.
In this embodiment, the tail of the mandrel body 1 is provided with a chamfer 24. Through the chamfer, can play the guide effect when the installation, can also prevent the scratch.
In this embodiment, a stepped hole 25 is provided in the mandrel body 1, and the pull rod 4 is provided in the stepped hole 25. The pull rod can be prevented from falling off by utilizing the stepped hole.
The utility model discloses a theory of operation and flow:
in using the utility model discloses the time, directly connect it soon on the workstation, at the in-process that connects soon, screw thread and the spindle main part on the pull rod screw thread can connect with the screw hole on the workstation soon, can be quick right the utility model discloses install and take off, during the clamping, separate the work piece cover the utility model discloses on, the position of work piece can be confirmed to the work piece locating surface, after the work piece has been placed, power supply in the workstation can stimulate the pull rod and remove, can strut the inflation with the inflation cover through first tapering face and second tapering face, in the inflation process, because inflation piece and inflation groove exist to fixed work piece, then just can process the work piece.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art; the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.
Claims (6)
1. A quick-change expansion mandrel is characterized by comprising a mandrel main body (1), wherein the mandrel main body (1) is hollow, a taper sleeve (2) is arranged at the front end of the mandrel main body (1), expansion sleeves (3) are arranged at the front end of the mandrel main body (1) and outside the taper sleeve (2), the expansion sleeves (3) are symmetrically arranged, a pull rod (4) is arranged in the mandrel main body (1), the mandrel main body (1) is a stepped shaft, a plurality of steps are arranged on the mandrel main body (1), each step comprises a first step (5), a second step (6), a third step (7), a fourth step (8) and a fifth step (9), a sliding groove (10) is arranged on the first step (5), a first taper surface (11) and a workpiece positioning surface (12) are arranged on the second step (6), a first thread (13) is arranged on the fourth step (8), be provided with holding ring (14) on fifth ladder (9), the afterbody of dabber main part (1) is the circular cone platform setting, the front end of tapering cover (2) is provided with second taper face (15), tapering cover (2) slip cup joint on first ladder (5), the front end of pull rod (4) is provided with trompil (16) and screw hole (17), the rear end of pull rod (4) is provided with second screw thread (18), be provided with a plurality of inflation pieces (19) on inflation cover (3), be provided with expansion groove (20) between inflation piece (19).
2. Quick-change expansion mandrel according to claim 1, characterized in that the conical sleeve (2) is provided with a through hole (22) in correspondence of the sliding groove (10).
3. Quick-change expansion mandrel according to claim 2, characterized in that a connecting shaft (23) is arranged in the through hole (22) and the pulling hole (16), and the connecting shaft (23) is fixedly connected to the pulling rod (4) through the threaded hole (17) by bolts.
4. Quick-change expansion mandrel according to claim 1, characterized in that the expansion tabs (19) are arranged in correspondence of the first tapering surface (11) and the second tapering surface (15).
5. Quick-change expansion mandrel according to claim 1, characterized in that the tail of the mandrel body (1) is provided with a chamfer (24).
6. Quick-change expansion mandrel according to claim 1, characterized in that a stepped bore (25) is provided in the mandrel body (1), the tie rod (4) being provided in the stepped bore (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120030043.XU CN214684325U (en) | 2021-01-07 | 2021-01-07 | Quick-change expansion mandrel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120030043.XU CN214684325U (en) | 2021-01-07 | 2021-01-07 | Quick-change expansion mandrel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214684325U true CN214684325U (en) | 2021-11-12 |
Family
ID=78562202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120030043.XU Active CN214684325U (en) | 2021-01-07 | 2021-01-07 | Quick-change expansion mandrel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214684325U (en) |
-
2021
- 2021-01-07 CN CN202120030043.XU patent/CN214684325U/en active Active
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