CN211162902U - Machine tool spindle structure with damping - Google Patents
Machine tool spindle structure with damping Download PDFInfo
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- CN211162902U CN211162902U CN201922372769.7U CN201922372769U CN211162902U CN 211162902 U CN211162902 U CN 211162902U CN 201922372769 U CN201922372769 U CN 201922372769U CN 211162902 U CN211162902 U CN 211162902U
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- main shaft
- spindle
- damper
- taper sleeve
- taper hole
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- Cutting Tools, Boring Holders, And Turrets (AREA)
Abstract
The utility model provides a machine tool main shaft structure with damping, which comprises a main shaft, wherein the front end of the main shaft is provided with a front taper hole; the spindle taper sleeve and the damper are also included; the main shaft taper sleeve is of a hollow conical structure and is fittingly installed in a front taper hole of the main shaft, a main shaft taper hole is further formed in the main shaft taper sleeve and used for installing a machining tool, and the damper is arranged between the front taper hole and the main shaft taper sleeve and is in contact with the main shaft taper sleeve. The utility model discloses a set up the attenuator, the rigidity contact structure of cooperation conical surface contact strengthens the contact performance of cutter handle of a knife and main shaft taper hole, and active control reduces and produces the shimmy in the cutting process, has solved the cutting in the lathe cutting process and has shimmy too big and main shaft taper hole face damage back, and the problem of quick maintenance and change has effectively improved the machining precision and the availability factor of lathe.
Description
Technical Field
The utility model relates to a machining center or lathe main shaft structure field especially relate to horizontal machining center or horizontal lathe main shaft, concretely relates to take initiative wireless adjustment control damper, removable main shaft front end taper shank cover have damped lathe main shaft structure.
Background
The structure of the existing main shaft of a machining center, particularly the main shaft of a horizontal machining center is as follows: the front end of the main shaft is provided with a main shaft taper hole, and the main shaft taper hole and the main shaft body are of an integrated structure.
On one hand, in the machining process, a cutter is subjected to dynamic cutting force to generate cutting vibration, the machining precision of a workpiece can be influenced due to the cutting vibration in the cutting process of a machine tool, and the currently adopted mode can only passively change technological parameters such as reducing the feeding amount, reducing the rotating speed of a main shaft and the like to reduce the influence of the cutting vibration on the machining precision, so that the machining efficiency is seriously influenced.
On the other hand, when a machining center of a tool spindle, particularly a horizontal machining center, changes a tool by using a manipulator, for example, when a large and long boring tool is encountered, the tool is subjected to the weight of the tool; meanwhile, as the clamping force of the mechanical arm is limited, when a cutter is installed in the spindle taper hole, the tail end of the cutter rivet can contact the surface of the spindle taper hole, and the surface of the spindle taper hole can be scratched to generate a sliding groove and a peripheral bulge for a long time, so that the positioning and installation accuracy of the cutter is seriously influenced, and the machining accuracy of a machine tool is influenced. In the existing method, once a scratch or a bulge occurs, a main shaft body part is dismounted after the whole main shaft assembly needs to be dismounted, and the main shaft body part is repaired, if the main shaft assembly cannot be repaired, the main shaft needs to be replaced, and therefore the service efficiency of a machine tool is seriously influenced.
Disclosure of Invention
The utility model aims at providing a take damped lathe main shaft structure to the problem of quick maintenance and change after the cutting shimmys too big and main shaft taper hole face damage in the initiative was solved lathe cutting process.
The specific scheme is as follows: a kind of damped lathe main axis structure, including a main axis, the front end of the main axis has a front taper hole; the spindle taper sleeve and the damper are matched;
the spindle taper sleeve is of a hollow conical structure and is fittingly arranged in a front taper hole of the spindle; a main shaft taper hole is also arranged in the main shaft taper sleeve and used for installing a machining tool;
the damper is arranged between the front taper hole and the main shaft taper sleeve and is in contact with the main shaft taper sleeve.
The utility model discloses a further technical scheme does: the outer side surface of the main shaft taper sleeve and the inner side surface of the front taper hole are both tapered inclined surfaces and are in close fit;
the inner side surface of the front taper hole is provided with uniformly distributed damper mounting grooves, and the dampers are arranged in the damper mounting grooves and abut against the outer side surface of the spindle taper sleeve.
The utility model discloses a further technical scheme does: the plurality of dampers are uniformly distributed on the inner side surface of the front taper hole in the circumference; and the damper is arranged at the position corresponding to the middle end of the spindle taper sleeve.
The utility model discloses a further technical scheme does: the damper is a wireless control damper.
The utility model discloses a further technical scheme does: the damper is circular, and correspondingly, the damper mounting groove is a circular groove.
The utility model discloses a further technical scheme does: the front end of the main shaft taper sleeve is also provided with a flange which is embedded in the front end face of the main shaft and locked on the main shaft through a bolt, and the front taper hole of the main shaft is tightly contacted with the joint face of the main shaft taper sleeve.
The utility model discloses a further technical scheme does: the transverse through groove transversely penetrates through the main shaft and the front end surface of the main shaft taper sleeve; the key block is used for mounting a cutter to transmit torque, and the transverse through groove transversely cuts the flange to divide the flange into an upper section and a lower section.
Has the advantages that: the utility model discloses a machine tool main shaft structure with damping, which comprises a main shaft, wherein the front end of the main shaft is provided with a front taper hole; the spindle taper sleeve and the damper are also included; the main shaft taper sleeve is of a hollow conical structure and is fittingly installed in a front taper hole of the main shaft, a main shaft taper hole is further formed in the main shaft taper sleeve and used for installing a machining tool, and the damper is arranged between the front taper hole and the main shaft taper sleeve and is in contact with the main shaft taper sleeve. The utility model discloses a set up the attenuator, the rigidity contact structure of cooperation conical surface contact strengthens the contact performance of cutter handle of a knife and main shaft taper hole, and active control reduces and produces the shimmy in the cutting process, has solved the cutting in the lathe cutting process and has shimmy too big and main shaft taper hole face damage back, and the problem of quick maintenance and change has effectively improved the machining precision and the availability factor of lathe.
And aiming at the defect that the machining precision is reduced due to the reduction of the contact rigidity between the spindle taper hole and the tool holder under the condition of high rotation speed of the spindle, the wireless control damper and the damper controller are further arranged, and the damper controller enables the appearance expansion of the damper to be changed through detection or program setting and in a wireless communication mode, so that the contact strength between the spindle taper hole and the tool holder is enhanced, and the stability of the machining precision of the machine tool is kept.
Meanwhile, in a further technical scheme, aiming at the problem that a spindle taper hole is damaged or damaged in the use process of a spindle, for example, in a horizontal machining center or a horizontal spindle machine tool, because a relatively heavy tool such as a boring tool is adopted, when a manipulator is used for tool changing, the center of gravity of the tool is shifted, when the tool is inserted into the spindle taper hole, a rivet at the tail of the tool can contact with the surface of the spindle taper hole, the situations of scratch, damage and the like can occur after long-term use, the matching precision of a tool holder and the spindle taper hole is influenced, and the machining precision of a part is inevitably influenced; in the prior art, the main shaft is disassembled and then repaired by corresponding machine tool machining, so that the maintenance period is long, if the main shaft cannot be repaired, the main shaft needs to be re-machined, and the production efficiency is seriously influenced due to the disassembly and assembly of the main shaft assembly or the re-machining of the main shaft. The utility model discloses a main shaft taper sleeve is convenient dismantles fast under the condition that the main shaft taper hole damaged and changes, need not disassemble the main shaft, reduces maintenance duration, has improved work efficiency greatly.
Drawings
Fig. 1 is a schematic structural diagram illustrating a spindle structure of a machine tool with damping according to the present invention;
FIG. 2 shows a cross-sectional view of FIG. 1;
FIG. 3 shows an exploded view of the structure of FIG. 1;
fig. 4 shows a broach force variation trend chart.
Detailed Description
To further illustrate the embodiments, the present invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references, one of ordinary skill in the art will appreciate other possible embodiments and advantages of the present invention. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.
The present invention will now be further described with reference to the accompanying drawings and detailed description.
Referring to fig. 1 to 3, the embodiment provides a damped machine tool spindle structure, which includes a cylindrical hollow spindle 1, a front taper hole 11 of a taper face is provided at a front end of the spindle 1; the front taper hole 11 is also internally provided with a main shaft taper sleeve 2 and four dampers 4.
The spindle taper sleeve 2 is of a hollow taper structure, and comprises a taper barrel-shaped main body part 20, the front end of the main body part 20 is provided with an annular convex flange 21, a spindle taper hole 22 is further arranged in the spindle taper sleeve, and the spindle taper hole is used for accommodating a cutter (not shown in the figure) and abuts against a taper surface of a tool holder of the cutter, so that the installation and fixation of the cutter are realized.
The spindle taper sleeve 2 is installed in the spindle 1 in a matching manner through the front taper hole 11, the flange 21 is embedded in the front end face of the spindle 1 and locked on the spindle 1 through the bolt 3, and the spindle taper hole 22 is formed in the spindle 1. Similarly, in order to mount the tool, the spindle 1 is further provided with a rivet hole 12 for tightening and fixing the tool.
In this embodiment, the damper 4 is disposed between the front taper hole 11 and the spindle taper sleeve 2, and rigidly abuts against the spindle taper sleeve 2, and its specific mounting structure is: the outer side surface of the main shaft taper sleeve 2 and the inner side surface of the front taper hole 11 are both tapered inclined surfaces; then, four circular grooves are arranged on the inner side surface of the front taper hole 11, namely, the damper mounting groove 114, the damper 4 is a circular wireless control damper, the damper enables the appearance of the damper to expand and change in a wireless communication mode, and the damper is correspondingly arranged in the mounting groove 114 to realize embedded installation.
The main body part 20 is inserted into the front taper hole 11 and is in rigid abutting connection with the wall surface of the front taper hole 11; then, the damper 4 is rigidly abutted against the outer wall surface of the main body 20, and the main body 20 is pressed.
In this embodiment, four dampers 4 are provided, and the four dampers are uniformly arranged on the inner side surface of the front taper hole 11; and the damper 4 is provided at a position corresponding to the rear end of the spindle taper sleeve 2. The spindle taper sleeve 2 is fixed by the flange 21 at the front end, and the rear end of the spindle taper sleeve is circumferentially clamped and fixed by the dampers 4, so that the effect of stabilizing the rear end structure is achieved.
Wherein, in order to further realize the fixing of the cutter and the damping action of the cutter handle, the embodiment further comprises a transverse through groove 10, the transverse through groove 10 transversely penetrates through the front end surfaces of the main shaft 1 and the main shaft taper sleeve 2, and in the machining process, in order to realize the best matching, the transverse through groove is required to be synchronously cut and machined with the main shaft 1 after the installation of the main shaft taper sleeve 2 is completed. The transverse through groove 10 transversely cuts the flange 21 to divide the flange 21 into an upper arc section and a lower arc section by a middle cutting. The cantilever fixing structure ensures that the damper 4 can fully play a role in damping on the premise of ensuring the machining precision.
The above is more suitable for the spindle with the spindle taper of 50# and 60# and provides comparison experiments with different rotating speeds and without dampers for verifying the control effect of the spindle structure of the machine tool with the damping on cutting chatter in the embodiment, and the experimental process and the experimental results are shown in table 1 and fig. 4.
TABLE 1 broach force test detecting table with different rotating speeds
As can be known from the table 1 and the figure 4, after the damper is arranged, the broach force attenuation is reduced along with the increase of the rotating speed of the main shaft, the cutter fixing effect is good, the cutter stability is greatly improved, and the problem of overlarge cutting vibration in the cutting process of the machine tool is solved.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. A kind of damped lathe main axis structure, including a main axis, the front end of the main axis has a front taper hole; the method is characterized in that: the spindle taper sleeve and the damper are also included;
the spindle taper sleeve is of a hollow conical structure and is fittingly arranged in a front conical hole of the spindle; a main shaft taper hole is also arranged in the main shaft taper sleeve and used for installing a machining tool;
the damper is arranged between the front taper hole and the spindle taper sleeve and is in contact with the spindle taper sleeve.
2. The damped machine tool spindle structure according to claim 1, wherein: the outer side surface of the main shaft taper sleeve and the inner side surface of the front taper hole are both tapered inclined surfaces;
the inner side surface of the front taper hole is uniformly provided with damper mounting grooves, and the dampers are arranged in the damper mounting grooves and abut against the outer side surface of the spindle taper sleeve.
3. The damped machine tool spindle construction of claim 2, wherein: the plurality of dampers are uniformly distributed on the inner side surface of the front taper hole in the circumference; and the damper is arranged at the position corresponding to the middle end of the spindle taper sleeve.
4. The damped machine tool spindle structure according to claim 3, wherein: the damper is a wireless control damper.
5. The damped machine tool spindle structure according to claim 3, wherein: the damper is circular, and correspondingly, the damper mounting groove is a circular groove.
6. The spindle structure of a machine tool with damping according to any one of claims 1 to 5, wherein: the front end of the main shaft taper sleeve is also provided with a flange which is embedded in the front end face of the main shaft and locked on the main shaft through a bolt, and the front taper hole of the main shaft is tightly contacted with the joint face of the main shaft taper sleeve.
7. The spindle structure of a machine tool with damping according to claim 6, characterized in that: the transverse through groove transversely penetrates through the main shaft and the front end surface of the main shaft taper sleeve; the key block is used for mounting a cutter to transmit torque, and the transverse through groove transversely cuts the flange to divide the flange into an upper section and a lower section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922372769.7U CN211162902U (en) | 2019-12-26 | 2019-12-26 | Machine tool spindle structure with damping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922372769.7U CN211162902U (en) | 2019-12-26 | 2019-12-26 | Machine tool spindle structure with damping |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211162902U true CN211162902U (en) | 2020-08-04 |
Family
ID=71821887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922372769.7U Active CN211162902U (en) | 2019-12-26 | 2019-12-26 | Machine tool spindle structure with damping |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211162902U (en) |
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2019
- 2019-12-26 CN CN201922372769.7U patent/CN211162902U/en active Active
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