CN216502430U - Mandrel machining tool - Google Patents
Mandrel machining tool Download PDFInfo
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- CN216502430U CN216502430U CN202220745735.7U CN202220745735U CN216502430U CN 216502430 U CN216502430 U CN 216502430U CN 202220745735 U CN202220745735 U CN 202220745735U CN 216502430 U CN216502430 U CN 216502430U
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- tensioning
- mandrel
- hole
- tensioning sleeve
- inner hole
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Abstract
The utility model discloses a mandrel machining tool, which belongs to the field of tools and comprises a clamping head, wherein a central through hole is formed in the center of the clamping head, the clamping head comprises a clamping section and an extension section, the extension section can extend into an inner hole of a mandrel, and the head end of the extension section is of a conical structure; the conical structure is sleeved with a tensioning sleeve, the inner hole of the tensioning sleeve is arranged to be a conical hole, the circumference of the side wall of the tensioning sleeve is provided with a plurality of tensioning seams, one end of each tensioning seam is closed, the other ends of the tensioning seams are communicated, and the closed ends of adjacent tensioning seams are respectively arranged at two ends of the tensioning sleeve; the tensioning device is characterized by further comprising a jacking column, wherein the jacking column abuts against one end of the tensioning sleeve, the diameter of the jacking column is smaller than the diameter of an inner hole of the mandrel and larger than the inner diameter of the tensioning sleeve, an extension rod is arranged at one end of the center of the jacking column, threads are arranged at the end part of the extension rod, and the extension rod can penetrate through a central through hole of the clamping head and then is in threaded connection with a nut. The utility model reduces the influence of the size change of the inner hole on the processing by combining the positioning of the inner hole with a specific tensioning structure.
Description
Technical Field
The utility model relates to the field of tools, in particular to a mandrel machining tool.
Background
In the forging and heat treatment processes of the core shaft with the holes, the inner hole and the outer circle of the formed forging are in a non-concentric state, and the deformation of the outer circle is large, so that the defective rate is high by clamping the outer circle, and the large allowance surface is not preferable as the reference surface due to the large machining allowance of the outer circle; if through the hole clamping, because along with the wearing and tearing that the mould used, the hole size can have the fluctuation of size, and it can influence the machining precision equally.
Aiming at the problems in the prior art, the utility model designs and manufactures a mandrel machining tool by combining years of design and use experience of related fields and assisting with over-strong professional knowledge, so as to overcome the defects.
SUMMERY OF THE UTILITY MODEL
For the problems in the prior art, the mandrel machining tool provided by the utility model has the advantage that the influence of the size change of the inner hole on machining is reduced by positioning the inner hole and combining the inner hole with the specific tensioning sleeve.
In order to achieve the purpose, the technical scheme adopted by the utility model is as follows: a mandrel machining tool comprises a clamping head, wherein a central through hole is formed in the center of the clamping head, the clamping head comprises a clamping section and an extending section, the extending section can extend into an inner hole of a mandrel, and the head end of the extending section is of a conical structure;
the conical structure is sleeved with a tensioning sleeve, the inner hole of the tensioning sleeve is a conical hole, a plurality of tensioning seams are arranged on the circumference of the side wall of the tensioning sleeve, one end of each tensioning seam is closed, the other end of each tensioning seam is communicated, and the closed ends of adjacent tensioning seams are respectively arranged at two ends of the tensioning sleeve;
the tensioning device is characterized by further comprising a jacking column, wherein the jacking column abuts against one end of the tensioning sleeve, the diameter of the jacking column is smaller than the diameter of an inner hole of the mandrel and larger than the inner diameter of the tensioning sleeve, an extension rod is arranged at one end of the center of the jacking column, threads are arranged at the end part of the extension rod, and the extension rod can penetrate through the screw thread connection nut behind the central through hole of the clamping head.
Preferably, the section of the clamping section is of a polygonal structure, and the minimum size of the clamping section is larger than the diameter of an inner hole of the mandrel.
Preferably, the other end of the center of the top column is provided with a positioning hole matched with a rear center of the lathe.
The utility model discloses an useful part lies in:
1. the utility model ensures that the tensioning sleeve has a certain elastic shrinkage range by positioning the inner hole and utilizing the matching of the tensioning sleeve and the conical structure of the clamping head, can be suitable for the change of the size of the inner hole of the mandrel and simultaneously keeps reliable contact and clamping with the inner hole surface of the mandrel.
2. The clamping head can be conveniently matched with a three-jaw chuck of a lathe, the design of the top column is combined with the matching of the rear top of the lathe, the lathe does not need to be changed, the mandrel can be quickly switched and clamped only by using the tool, and the machining efficiency and quality of the mandrel are improved.
Drawings
FIG. 1 is a schematic structural view of a mandrel machining tool mounted on a mandrel;
FIG. 2 is a cross-sectional view of a mandrel machining tool mounted on a mandrel;
fig. 3 is a schematic structural diagram of a tensioning sleeve of a mandrel machining tool.
In the figure: 1-clamping head, 2-top column, 3-nut, 4-expansion sleeve, 11-clamping section, 12-stretching section, 21-extension bar, 22-positioning hole and 41-expansion seam.
Detailed Description
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1 to 3, a mandrel machining tool comprises a clamping head 1, a central through hole is arranged in the center of the clamping head 1, the clamping head 1 comprises a clamping section 11 and an extending section 12, the extending section 12 can extend into an inner hole of a mandrel, through the inner hole positioning, specifically, the head end of the extension section 12 is set to be a conical structure, the conical structure is sleeved with the tensioning sleeve 4, the tensioning sleeve 4 is matched with the conical structure of the clamping head 1, the tensioning sleeve 4 is ensured to have a certain elastic shrinkage range, the mandrel inner hole positioning device can be suitable for the size change of the inner hole of the mandrel, meanwhile, reliable contact and clamping with the inner hole surface of the mandrel are kept, the inner hole of the tensioning sleeve 4 is designed to be a conical hole, a plurality of tensioning seams 41 are arranged on the circumference of the side wall of the tensioning sleeve 4, one end of each tensioning seam 41 is closed, the other ends of the tensioning seams 41 are communicated, and the closed ends of the adjacent tensioning seams 41 are respectively arranged at two ends of the tensioning sleeve 4, so that the two ends of the tensioning sleeve 4 are synchronously and radially tensioned in the tensioning process;
the utility model also comprises a top column 2, wherein the top column 2 is propped against one end of the tensioning sleeve 4, the diameter of the top column 2 is smaller than the diameter of the inner hole of the mandrel and larger than the inner diameter of the tensioning sleeve 4, an extension rod 21 is arranged at one end of the center of the top column 2, threads are arranged at the end part of the extension rod 21, the extension rod 21 can penetrate through the central through hole of the clamping head 1 and then is in threaded connection with a nut 3, the tensioning sleeve 4 is tightly propped against the conical structure of the clamping head 1 by screwing the nut 3, and further the radial tensioning of the tensioning sleeve 4 is realized.
In order to facilitate the clamping of the three-jaw chuck of the lathe, the section of the clamping section 11 is preferably of a polygonal structure, and the minimum size of the clamping section 11 is larger than the diameter of an inner hole of the mandrel. And the other end of the center of the top column 2 is preferably provided with a positioning hole 22 matched with the rear center of the lathe, the whole structure does not need to change the lathe, the fast switching and clamping of the mandrel can be realized only by using the tool, and the mandrel machining efficiency and quality are improved.
The specific using process of the utility model is as follows:
the first step is as follows: firstly, a clamping head 1, a tensioning sleeve 4 and a support pillar 2 of the tool are assembled together, then a nut 3 is screwed in and screwed, and at the moment, three parts of the tool are not in a tight fit state but in a loose state.
The second step is that: the clamping section 11 of the clamping head 1 is clamped by using a chuck of a lathe, one end of the mandrel is inserted into the clamping section 11 of the clamping head 1 from the end of the top column 2 of the tool, the end of the mandrel is in contact with the end of the mandrel, then the positioning hole 22 of the top column 2 is tightly jacked by using a rear center of the lathe, at this time, the end face of the top column 2 can push the tensioning sleeve 4 to move towards the clamping section 11, and as the matching surface of the tensioning sleeve 4 and the end of the stretching section 12 is a conical surface, and the tensioning sleeve 4 has the expansion and contraction effect, the outer circle of the tensioning sleeve 4 can gradually become large along with the movement of the tensioning sleeve 4 until the tensioning sleeve 4 is in close contact with the inner hole of the mandrel, so that the clamping of the mandrel is completed, and then the machining can be started.
The third step: after the mandrel is machined, a rear center of the lathe is loosened, the mandrel is tapped towards the rear direction of the lathe, the mandrel drives the tensioning sleeve 4 to move backwards, and when the tensioning sleeve 4 is separated from the head end of the stretching section 12, the tensioning sleeve 4 contracts, so that the mandrel can be smoothly taken out, and the tensioning sleeve 4 and the ejection column 2 cannot be separated from the clamping head 1 due to the fact that the extension rod 21 is screwed with the nut 3.
After the third step is completed, another mandrel can be switched to continue processing.
It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should also be understood that various alterations, modifications and/or variations can be made to the present invention by those skilled in the art after reading the technical content of the present invention, and all such equivalents fall within the protective scope defined by the claims of the present application.
Claims (3)
1. The mandrel machining tool is characterized by comprising a clamping head, wherein a central through hole is formed in the center of the clamping head, the clamping head comprises a clamping section and an extending section, the extending section can extend into an inner hole of a mandrel, and the head end of the extending section is of a conical structure;
the conical structure is sleeved with a tensioning sleeve, the inner hole of the tensioning sleeve is a conical hole, a plurality of tensioning seams are arranged on the circumference of the side wall of the tensioning sleeve, one end of each tensioning seam is closed, the other end of each tensioning seam is communicated, and the closed ends of adjacent tensioning seams are respectively arranged at two ends of the tensioning sleeve;
the tensioning device is characterized by further comprising a jacking column, wherein the jacking column abuts against one end of the tensioning sleeve, the diameter of the jacking column is smaller than the diameter of an inner hole of the mandrel and larger than the inner diameter of the tensioning sleeve, an extension rod is arranged at one end of the center of the jacking column, threads are arranged at the end part of the extension rod, and the extension rod can penetrate through the screw thread connection nut behind the central through hole of the clamping head.
2. The mandrel machining tool according to claim 1, wherein the cross section of the clamping section is of a polygonal structure, and the minimum size of the clamping section is larger than the diameter of an inner hole of the mandrel.
3. The mandrel machining tool according to claim 1, wherein a positioning hole is formed in the other end of the center of the top column and matched with a rear center of a lathe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220745735.7U CN216502430U (en) | 2022-04-02 | 2022-04-02 | Mandrel machining tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220745735.7U CN216502430U (en) | 2022-04-02 | 2022-04-02 | Mandrel machining tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216502430U true CN216502430U (en) | 2022-05-13 |
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ID=81518997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220745735.7U Active CN216502430U (en) | 2022-04-02 | 2022-04-02 | Mandrel machining tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216502430U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115365770A (en) * | 2022-09-19 | 2022-11-22 | 中船华南船舶机械有限公司 | Method for processing connecting rod head |
-
2022
- 2022-04-02 CN CN202220745735.7U patent/CN216502430U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115365770A (en) * | 2022-09-19 | 2022-11-22 | 中船华南船舶机械有限公司 | Method for processing connecting rod head |
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