CN211192065U - Quick expanding mandrel - Google Patents
Quick expanding mandrel Download PDFInfo
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- CN211192065U CN211192065U CN201921771752.2U CN201921771752U CN211192065U CN 211192065 U CN211192065 U CN 211192065U CN 201921771752 U CN201921771752 U CN 201921771752U CN 211192065 U CN211192065 U CN 211192065U
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- mandrel
- outer sleeve
- movable outer
- fixed mandrel
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Abstract
The utility model provides a quick expansion force mandrel, which comprises a fixed mandrel, a movable outer sleeve and an unloading device, wherein the unloading device is arranged on the movable outer sleeve, the movable outer sleeve is sleeved on the outer peripheral side of the fixed mandrel, and the unloading device is connected with the fixed mandrel; the utility model selects 40Cr and carries out quenching treatment with the hardness of HRC48-55 on the surface, thereby effectively improving the fatigue strength and greatly prolonging the service life; meanwhile, the fixed mandrel is in threaded connection with the movable outer sleeve, and the matching surface of the fixed mandrel and the movable outer sleeve controls the removed roughness to be within the roughness of a grinding mirror surface by adopting a grinding process so as to ensure the size and the processing precision, greatly improve the loading and unloading speed, simplify the operation steps and more facilitate the quick loading and unloading of the processed parts; moreover, the fixed mandrel structure, the movable outer sleeve structure and the connection mode of the fixed mandrel structure and the movable outer sleeve structure are high in universality, and the limitation of the traditional mandrel on the size is eliminated.
Description
Technical Field
The utility model relates to a machine tool machining field especially indicates a quick expanding mandrel.
Background
With the development of the mechanical industry, the mechanical processing industry has also developed rapidly, and in recent years, with the development of industrial products, higher requirements are put forward on the mechanical processing process. The mandrel is an indispensable device in the process of processing the excircle, so certain requirements are required for the mandrel in the processing process, the precision requirements for parts are more and more strict, the requirements for size or roughness are improved year by year, higher requirements are also provided for the production efficiency of processing the parts, the proportion of working hours spent in the processing process is continuously improved, the enterprise profit is more and more low, the production efficiency is improved, the processing precision is guaranteed to be unbearable, the traditional expansive mandrel has clamping errors, the abrasion is serious in the use process, the clamping wastes time and energy, the improvement of the production efficiency is seriously restricted, the processing precision can be gradually reduced along with the use time more seriously, and therefore, the improvement of the mandrel is urgent.
SUMMERY OF THE UTILITY MODEL
The utility model provides a quick expansion mandrel, which effectively improves the fatigue strength by selecting 40Cr and simultaneously carrying out quenching treatment with the hardness of HRC48-55 on the surface, ensures that the quick expansion mandrel has good stability and greatly prolongs the service life; meanwhile, the fixed mandrel is fixedly connected with the movable outer sleeve through threads, and the removed roughness is controlled within the roughness of a grinding mirror surface by adopting a grinding process on the matching surface of the fixed mandrel and the movable outer sleeve so as to ensure the size and the processing precision, so that the loading and unloading speed is greatly improved, the operation steps are simplified, the time for loading and unloading workpieces is reduced, the quick loading and unloading of processed parts are more convenient, and the production efficiency is effectively improved; moreover, the fixed mandrel structure, the movable outer sleeve structure, the connection mode and the connection mode of the fixed mandrel structure and the movable outer sleeve structure are high in universality and large in application range, and the limitation of the traditional mandrel to the size is eliminated.
The technical scheme of the utility model is realized like this:
a fast expansion mandrel comprises a fixed mandrel, a movable outer sleeve and an unloading device, wherein the unloading device is arranged on the movable outer sleeve, the movable outer sleeve is sleeved on the outer peripheral side of the fixed mandrel, and the unloading device is connected with the fixed mandrel;
the fixed mandrel is provided with a threaded blind hole;
the unloading device comprises a stop head, a connecting rod, a check ring and an adjusting screw rod, the adjusting screw rod is fixedly connected with the connecting rod, the check ring is fixed at the joint of the adjusting screw rod and the connecting rod, and the connecting rod penetrates through the stop head and is fixedly connected with the stop head;
the unloading device is movably sleeved in the movable outer sleeve through the connecting rod;
the unloading device is in threaded connection with the threaded blind hole in the fixed mandrel through the adjusting screw rod.
Furthermore, one side of the connecting rod, which penetrates through the blocking head, is provided with an adjusting blind hole for adjusting the matching tightness of the fixed mandrel and the movable outer sleeve.
Further, the fixed mandrel is a conical shaft, and the diameter of the conical shaft is gradually increased from one side close to the movable outer sleeve to one side far away from the movable outer sleeve;
a stepped hole which is used for being matched with the fixed mandrel and used for installing an unloading device is formed in the movable outer sleeve, and the diameter of the stepped hole is gradually reduced from one side connected with the fixed mandrel to the side departing from the fixed mandrel;
one side of the stepped hole, which is connected with the fixed mandrel in a matching way, is a tapered hole.
Furthermore, the roughness of the matching surface of the fixed mandrel and the movable outer sleeve is the grinding mirror surface roughness.
Furthermore, the expansion mandrel is a 40Cr expansion mandrel with the quenching hardness of HRC 48-55.
Furthermore, the length of the threaded blind hole is greater than that of the adjusting screw.
The utility model selects 40Cr, and simultaneously carries out quenching treatment with the hardness of HRC48-55 on the surface, thereby effectively improving the fatigue strength, ensuring that the quick expansion mandrel has good stability and greatly prolonging the service life; meanwhile, the fixed mandrel is fixedly connected with the movable outer sleeve through threads, and the removed roughness is controlled within the roughness of a grinding mirror surface by adopting a grinding process on the matching surface of the fixed mandrel and the movable outer sleeve so as to ensure the size and the processing precision, so that the loading and unloading speed is greatly improved, the operation steps are simplified, the time for loading and unloading workpieces is reduced, the quick loading and unloading of processed parts are more convenient, and the production efficiency is effectively improved; moreover, the fixed mandrel structure, the movable outer sleeve structure, the connection mode and the connection mode of the fixed mandrel structure and the movable outer sleeve structure are high in universality and large in application range, and the limitation of the traditional mandrel to the size is eliminated.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for a customer of ordinary skill in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic view of the overall structure of the fast expansion mandrel according to the embodiment of the present invention;
FIG. 2 is a schematic view of a fixed mandrel of the fast expansion mandrel of FIG. 1;
FIG. 3 is a schematic diagram of the movable outer sleeve of the rapid expansion mandrel of FIG. 1;
FIG. 4 is a schematic view of the unloading mechanism of the quick expansion mandrel of FIG. 1;
fig. 5 is a schematic view showing the connection relationship between the movable sleeve and the unloading device in the quick-expansion mandrel shown in fig. 1, 3 and 4.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the embodiment of the present invention, as shown in fig. 1 to 5, a fast expansion mandrel comprises a fixed mandrel 1, a movable outer sleeve 3 and an unloading device 2, wherein the unloading device 2 is installed on the movable outer sleeve 3, the movable outer sleeve 3 is sleeved on the outer peripheral side of the fixed mandrel 1, and the unloading device 2 is connected with the fixed mandrel 1;
a threaded blind hole 11 is formed in the fixed mandrel 1;
the unloading device 2 comprises a stopper 24, a connecting rod 23, a retainer ring 22 and an adjusting screw 21, the adjusting screw 21 is fixedly connected with the connecting rod 23, the retainer ring 22 is fixed at the joint of the adjusting screw 21 and the connecting rod 23, and the connecting rod 23 penetrates through the stopper 24 and is fixedly connected with the stopper 24;
the unloading device 2 is movably sleeved in the movable outer sleeve 3 through a connecting rod 23;
the unloading device 2 is in threaded connection with the threaded blind hole 11 on the fixed mandrel 1 through an adjusting screw 21.
In the specific embodiment of the present invention, as shown in fig. 1 to 5, one side of the connecting rod 23 passing through the stopper 24 is provided with an adjusting blind hole 231 for adjusting the tightness of the fixed mandrel 1 and the movable outer sleeve 3;
the adjusting blind hole 231 can be a threaded hole, a pentagonal adjusting hole and other holes with adjusting function;
when installing the unloading device 2 or adjusting the tightness of the workpiece to be machined, the blind hole 231 can be adjusted using an assisting tool to continue screwing the unloading device 2 into the threaded blind hole 11 of the fixed mandrel 1.
In the specific embodiment of the present invention, as shown in fig. 1 to 5, the fixed mandrel 1 is a tapered shaft, and the diameter of the tapered shaft 1 gradually increases from the side close to the movable outer sleeve 3 to the side far from the movable outer sleeve 3;
the movable outer sleeve 3 is provided with a stepped hole 31 which is used for matching with the fixed mandrel 1 and installing the unloading device 2, and the diameter of the stepped hole 31 is gradually reduced from one side connected with the fixed mandrel 1 to one side departing from the fixed mandrel 1;
one side of the stepped hole 31 which is matched and connected with the fixed mandrel 1 is a tapered hole;
the stepped hole 31 and the fixed mandrel 1 are arranged to be tapered, the movable outer sleeve 3 can be tightly expanded on the outer peripheral side of the fixed mandrel 1 in the process that the unloading device 2 is screwed on the fixed mandrel 1, and then a processed workpiece is tightly expanded on the outer peripheral side of the movable outer sleeve 3, so that the installation step of clamping the processed workpiece is simplified, and the device is simpler and more convenient.
In the specific embodiment of the present invention, as shown in fig. 1 to 5, the roughness of the mating surfaces of the fixed mandrel 1 and the movable outer sleeve 3 is the grinding mirror roughness;
after the roughness of the matching surface is kept in the roughness of the grinding mirror surface, the machining precision is effectively guaranteed, and the fast installation and the fast unloading of the machined parts can be facilitated to a certain extent.
In the specific embodiment of the present invention, as shown in fig. 1 to 5, the expansion mandrel 1 is a 40Cr expansion mandrel with a quenching hardness of HRC 48-55.
In the embodiment of the present invention, as shown in fig. 1 to 5, the length of the blind threaded hole 11 is greater than the length of the adjusting screw 21.
In the embodiment of the present invention, as shown in fig. 1 to 5, when a fast expansion mandrel device is studied, a selected material needs to be determined first, after a plurality of hardness and fatigue strength tests, 40Cr is selected finally, and meanwhile, a modulated heat treatment process is adopted, which has good comprehensive mechanical properties after modulation, wherein the heat treatment process is surface quenching, the quenching hardness is HRC48-55, and the quenched material has higher fatigue strength.
In the specific embodiment of the present invention, see fig. 1 to 5, in use, the adjusting screw 21 of the unloading device 2 is aligned to the blind hole 11 on the fixed mandrel 1, and the movable outer sleeve 3 is aligned to the outer peripheral side of the fixed mandrel 1, and then the stopper 24 is rotated, and the stopper 24 finally drives the adjusting screw 21 to install the unloading device 2 on the blind hole 11 of the fixed mandrel 1 through a thread, and then the workpiece to be processed is sleeved on the movable outer sleeve 3, and then the unloading device 2 is adjusted again, so that the unloading device 2 continues to move towards the fixed mandrel 1, and the movable outer sleeve 3 is expanded while the unloading device 2 continues to move towards the fixed mandrel 1, so that the workpiece is tightly expanded to the outer peripheral side of the movable outer sleeve 3;
by the aid of the unloading device 2, the movable outer sleeve 3 can be expanded, tightened and unloaded integrally, installation steps are greatly simplified, adjusting time required by clamping of workpieces is shortened, and production efficiency is greatly improved;
meanwhile, the rapid expansion mandrel changes the matching clamping of the traditional clamp into an adjustable clamping device, so that the universality and the application range of the fixed mandrel 1 are greatly improved, and the limitation of the traditional mandrel on the size of a processed workpiece is eliminated;
and the quick expansion mandrel in the application has simple structure and convenient operation, not only can ensure the processing precision (size, position and roughness) of the product, but also has quick clamping, greatly improves the production efficiency, simultaneously adopts a new material to cooperate with proper heat treatment, ensures that the equipment has good stability, greatly improves the service cycle of the equipment, greatly prolongs the service life of the equipment and ensures the smooth and easy processing process.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a quick expanding force dabber which characterized in that: the unloading device is arranged on the movable outer sleeve, the movable outer sleeve is sleeved on the outer peripheral side of the fixed mandrel, and meanwhile, the unloading device is connected with the fixed mandrel;
the fixed mandrel is provided with a threaded blind hole;
the unloading device comprises a stop head, a connecting rod, a check ring and an adjusting screw rod, the adjusting screw rod is fixedly connected with the connecting rod, the check ring is fixed at the joint of the adjusting screw rod and the connecting rod, and the connecting rod penetrates through the stop head and is fixedly connected with the stop head;
the unloading device is movably sleeved in the movable outer sleeve through the connecting rod;
the unloading device is in threaded connection with the threaded blind hole in the fixed mandrel through the adjusting screw rod.
2. A rapid expansion mandrel as claimed in claim 1, wherein: one side of the connecting rod penetrating through the blocking head is provided with an adjusting blind hole used for adjusting the tightness of the fixed mandrel and the movable outer sleeve in a matched mode.
3. A rapid expansion mandrel as claimed in claim 1, wherein: the fixed mandrel is a conical shaft, and the diameter of the conical shaft is gradually increased from one side close to the movable outer sleeve to one side far away from the movable outer sleeve;
a stepped hole which is used for being matched with the fixed mandrel and used for installing an unloading device is formed in the movable outer sleeve, and the diameter of the stepped hole is gradually reduced from one side connected with the fixed mandrel to the side departing from the fixed mandrel;
one side of the stepped hole, which is connected with the fixed mandrel in a matching way, is a tapered hole.
4. A rapid expansion mandrel as claimed in claim 1, wherein: the roughness of the matching surface of the fixed mandrel and the movable outer sleeve is grinding mirror surface roughness.
5. A rapid expansion mandrel as claimed in claim 1, wherein: the rapid expansion mandrel is a 40Cr rapid expansion mandrel with the quenching hardness of HRC 48-55.
6. A rapid expansion mandrel as claimed in claim 1, wherein: the length of the threaded blind hole is greater than that of the adjusting screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921771752.2U CN211192065U (en) | 2019-10-21 | 2019-10-21 | Quick expanding mandrel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921771752.2U CN211192065U (en) | 2019-10-21 | 2019-10-21 | Quick expanding mandrel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211192065U true CN211192065U (en) | 2020-08-07 |
Family
ID=71847098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921771752.2U Active CN211192065U (en) | 2019-10-21 | 2019-10-21 | Quick expanding mandrel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211192065U (en) |
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2019
- 2019-10-21 CN CN201921771752.2U patent/CN211192065U/en active Active
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