CN216989890U - Structure for controlling vibration of main shaft - Google Patents
Structure for controlling vibration of main shaft Download PDFInfo
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- CN216989890U CN216989890U CN202220233520.7U CN202220233520U CN216989890U CN 216989890 U CN216989890 U CN 216989890U CN 202220233520 U CN202220233520 U CN 202220233520U CN 216989890 U CN216989890 U CN 216989890U
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- main shaft
- jacking
- vibration
- controlling vibration
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Abstract
The utility model relates to a structure for controlling the vibration of a spindle, which comprises a spindle box, a vibration sensor and a controller, wherein the spindle box is used for fixing the spindle, and one end of the spindle is arranged in the spindle box; the jacking parts are uniformly arranged along the circumferential direction of the main shaft and face the main shaft, and are used for jacking the main shaft when the main shaft vibrates. The structure for controlling the vibration of the main shaft is assembled on large, medium and small CNC equipment, and the plurality of jacking parts are uniformly arranged in the circumferential direction of the inner wall of the main shaft box, so that the plurality of jacking parts support against the shaft body of the electric main shaft, the vibration of the electric main shaft is restrained, the machining precision of the main shaft and the surface machining quality of a workpiece are guaranteed, and the precision and the surface roughness of the workpiece are improved.
Description
Technical Field
The utility model relates to the technical field of machine tool machining, in particular to a structure for controlling vibration of a main shaft.
Background
The electric main shaft is a new technology which integrates a machine tool main shaft and a main shaft motor into a whole and appears in the field of numerical control machine tools, and the electric main shaft, a linear motor technology and a high-speed cutter technology push high-speed processing to a new era. The electric spindle comprises the electric spindle and accessories thereof, and comprises the electric spindle, a high-frequency conversion device, an oil mist lubricator, a cooling device, a built-in encoder, a tool changer and the like. The rotor of the motor is directly used as the main shaft of the machine tool, the shell of the main shaft unit is the motor base, and the motor and the main shaft of the machine tool are integrated by matching with other parts.
With the rapid development and the gradual improvement of electric transmission technologies (frequency conversion speed regulation technology, motor vector control technology and the like), the mechanical structure of a main transmission system of a high-speed numerical control machine tool is greatly simplified, and belt wheel transmission and gear transmission are basically cancelled. The main shaft of the machine tool is directly driven by the built-in motor, so that the length of a main transmission chain of the machine tool is shortened to zero, and zero transmission of the machine tool is realized. The transmission structure form of the ' Spindle unit ' that the Spindle Motor and the machine tool Spindle are combined into a whole ' enables the Spindle part to be relatively independent from the transmission system and the whole structure of the machine tool, and is also called as an electric Spindle (Motor Spindle). Since the current electric spindle mainly uses an ac High-frequency motor, it is also called a "High-frequency spindle" (High-frequency spindle). Because there is no intermediate transmission link, it is sometimes called "Direct Drive Spindle" (Direct Drive Spindle).
CNC automation equipment on the market now all can use electric main shaft, and electric main shaft can be through flange mounting or centre gripping formula installation. The main shaft is arranged on the main shaft box through the flange, the whole main shaft is fixed on the flange, namely the flange bears the total weight of the main shaft, simultaneously the flange also bears the stress and the vibration of the main shaft during high-speed operation, and simultaneously the flange also bears the resistance and the complex vibration generated in the cutting process of the main shaft. Meanwhile, the main shaft flange is positioned at the front end of the main shaft, and under the condition that the main shaft is stressed to generate vibration, the front end and the rear end of the flange at two sides of the main shaft have different vibration conditions, so that the main shaft has unstable vibration, and the machining precision and the part machining surface quality are influenced.
SUMMERY OF THE UTILITY MODEL
Based on the above, the utility model aims to provide a structure for controlling the vibration of a spindle, which is assembled on large, medium and small CNC equipment, and a plurality of jacking parts are uniformly arranged in the circumferential direction of the inner wall of a spindle box, so that the jacking parts can be used for abutting against the spindle body of an electric spindle, the vibration of the electric spindle is inhibited, the machining precision of the spindle and the surface machining quality of a workpiece are ensured, and the precision and the surface roughness of the workpiece are improved.
The present invention provides a structure for controlling vibration of a spindle, including:
the spindle box is used for fixing a spindle, and one end of the spindle is arranged in the spindle box;
the jacking parts are uniformly arranged along the circumferential direction of the main shaft and face the main shaft, and are used for jacking the main shaft when the main shaft vibrates.
Furthermore, the jacking part can be arranged on the inner wall of the spindle box in an adjustable depth mode.
Furthermore, the number of the jacking pieces is four.
Furthermore, the jacking member comprises a shell, a contact block, an elastic member and a pre-pressing block, the spindle box is provided with a through threaded hole, threads are arranged on the outer surface of the shell, a hollow channel penetrating through the shell is arranged in the shell, the depth of the pre-pressing block can be adjusted to be arranged in the middle of the hollow channel, the contact block is movably arranged at the end part of the hollow channel, the elastic member is arranged between the pre-pressing block and the contact block, and the contact block is used for jacking the spindle.
Furthermore, the pre-pressing block is a pre-pressing screw, and threads matched with the pre-pressing screw are arranged on the inner wall of the hollow channel.
Furthermore, the elastic part is a spring, one end of the spring is connected with the pre-pressing screw, and the other end of the spring is abutted to the contact block.
Further, the contact block is a rubber head.
Furthermore, the rubber head is made of wear-resistant rubber.
Furthermore, the inner wall of the spindle box is provided with an avoidance position at the position penetrating through the threaded hole.
Compared with the prior art, the structure for controlling the vibration of the main shaft has the following beneficial effects:
1. according to the structure for controlling the vibration of the main shaft, the plurality of jacking parts are uniformly arranged in the circumferential direction of the inner wall of the main shaft box, so that the jacking parts can be used for abutting against the shaft body of the electric main shaft, the vibration of the electric main shaft is restrained, the machining precision of the main shaft and the surface machining quality of a workpiece are ensured, and the precision and the surface roughness of the workpiece are improved.
2. The depth of the jacking part of the structure for controlling the main shaft to vibrate is adjustable on the inner wall of the main shaft box, so that the jacking part adjusts the pre-pressing amount aiming at different main shafts, and the best effect of inhibiting vibration is achieved.
Drawings
FIG. 1 is a general schematic diagram of a structure for controlling spindle vibration in one embodiment of the present invention;
FIG. 2 is a cross-sectional view of one of the structures for controlling spindle vibration of FIG. 1;
fig. 3 is a schematic structural view of the pressing member of fig. 1;
FIG. 4 is a cross-sectional view of the top press member of FIG. 3;
in the figure: 10. a main spindle box; 11. a through threaded hole; 20. a jacking member; 21. a housing; 22. prepressing screws; 23. a spring; 24. gluing heads; 30. and (4) electrically driving the spindle.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
As shown in fig. 1-2, a structure for controlling vibration of a spindle in an embodiment of the present invention includes:
the rear end of the electric spindle 30 is arranged in the spindle head 10, the front end of the electric spindle 30 for connecting with a processing tool is arranged outside the spindle head 10, and the flange of the electric spindle 30 is connected with the bottom of the spindle head 10.
During operation, the flange is located at the front end of the electric spindle 30, the flange bears the total weight of the electric spindle 30, meanwhile, the flange also bears the stress and vibration of the electric spindle 30 during high-speed operation, and different vibration conditions occur at the front end and the rear end of the two sides of the flange.
The jacking member 20 is provided with a plurality of through threaded holes 11 on the spindle box 10, the jacking members 20 are respectively uniformly arranged on the inner wall of the spindle box 10 through the through threaded holes 11 and along the circumferential direction of the spindle, and the jacking member 20 is used for jacking the shaft body of the electric spindle when the electric spindle vibrates. Further, the inner wall of the spindle box is provided with an avoidance position at a position penetrating through the threaded hole, and the jacking piece 20 reduces friction with the inner wall.
Specifically, in the present embodiment, the number of the pressing members 20 is four, and the pressing members are uniformly distributed on the quadrant limit of the spindle head 10. In other examples, the pressing member 20 may press the spindle at different positions according to the requirement.
The jacking member 20 is as shown in fig. 3-4, the jacking member 20 comprises a shell 21, a contact block, an elastic member and a pre-pressing block, a thread is arranged on the outer surface of the shell 21, a hollow channel penetrating through the shell 21 is arranged inside the shell 21, the pre-pressing block is fixedly arranged in the middle of the hollow channel, the depth of the pre-pressing block can be adjusted, the contact block is movably arranged in the hollow channel, the contact block is used for jacking a piezoelectric main shaft 30, and the elastic member is arranged between the pre-pressing block and the contact block.
The pre-pressing block, in this embodiment, the pre-pressing block is specifically a pre-pressing screw 22, the inner wall of the hollow channel is provided with threads to form an adjustable pre-pressing block 22, and the position of the pre-pressing screw 22 is adjusted by a torque wrench for different spindles during operation, so as to achieve the best effect of suppressing vibration.
The elastic part is a spring 23, one end of the spring 23 is connected with the pre-pressing screw 22, and the other end of the spring 23 is abutted against the contact block.
The contact block, which is the rubber head 24 in the embodiment, the rubber head 24 is made of wear-resistant rubber, and in other examples, the contact block may be made of other wear-resistant materials, such as wear-resistant ceramics, and Al2O3The material is taken as a main raw material, rare metal oxide is taken as a flux, and the material is formed by high-temperature roasting; wear-resistant alloy steel mainly comprises medium, low and high carbon multi-component alloy steel; wear-resistant chromium cast iron mainly comprises high, medium and low chromium alloy cast iron; various composite materials and hard alloy materials, chromium carbide composite materials, high-energy ion-impregnated tungsten carbide materials, high-toughness hard alloys and the like; the austempering heat treatment or the addition of alloy elements is carried out on the austempering ductile iron material, so that the ductile iron matrix structure is converted from ferrite and pearlite into an austempering body, bainite and residual austenite.
Compared with the prior art, the structure for controlling the vibration of the main shaft has the following beneficial effects:
1. according to the structure for controlling the vibration of the main shaft, the plurality of jacking parts are uniformly arranged in the circumferential direction of the inner wall of the main shaft box, so that the jacking parts can be used for abutting against the shaft body of the electric main shaft, the vibration of the electric main shaft is restrained, the machining precision of the main shaft and the surface machining quality of a workpiece are ensured, and the precision and the surface roughness of the workpiece are improved.
2. The depth of the jacking part of the structure for controlling the main shaft vibration is adjustable on the inner wall of the main shaft box, so that the jacking part adjusts the pre-pressing amount aiming at different main shafts, and the best effect of inhibiting the vibration is achieved.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the utility model. It should be noted that various changes and modifications can be made by those skilled in the art without departing from the spirit of the utility model, and these changes and modifications are all within the scope of the utility model.
Claims (9)
1. A structure for controlling vibration of a spindle, comprising:
the spindle box is used for fixing a spindle, and one end of the spindle is arranged in the spindle box;
the jacking parts are uniformly arranged along the circumferential direction of the main shaft and face the main shaft, and are used for jacking the main shaft when the main shaft vibrates.
2. A structure for controlling vibration of a main shaft according to claim 1, wherein:
the top pressing piece is arranged on the inner wall of the spindle box in a depth-adjustable manner.
3. A structure for controlling vibration of a spindle according to claim 2, wherein:
the number of the jacking pieces is four.
4. A structure for controlling vibration of a spindle according to any one of claims 1 to 3, wherein:
the jacking part comprises a shell, a contact block, an elastic part and a pre-pressing block, a through threaded hole is formed in the spindle box, threads are formed in the outer surface of the shell, a hollow channel penetrating through the shell is formed in the shell, the depth of the pre-pressing block can be adjusted to be arranged in the middle of the hollow channel, the contact block is movably arranged at the end of the hollow channel, the elastic part is arranged between the pre-pressing block and the contact block, and the contact block is used for jacking the spindle.
5. A structure for controlling vibration of a spindle according to claim 4, wherein:
the pre-pressing block is a pre-pressing screw, and threads matched with the pre-pressing screw are arranged on the inner wall of the hollow channel.
6. A structure for controlling vibration of a main shaft according to claim 5, wherein:
the elastic part is a spring, one end of the spring is connected with the pre-pressing screw, and the other end of the spring is abutted to the contact block.
7. A structure for controlling vibration of a spindle according to claim 4, wherein:
the contact block is a rubber head.
8. A structure for controlling vibration of a spindle according to claim 7, wherein:
the rubber head is made of wear-resistant rubber.
9. A structure for controlling vibration of a spindle according to claim 4, wherein:
the inner wall of the spindle box is provided with an avoiding position, and the avoiding position is located around the through threaded hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220233520.7U CN216989890U (en) | 2022-01-27 | 2022-01-27 | Structure for controlling vibration of main shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220233520.7U CN216989890U (en) | 2022-01-27 | 2022-01-27 | Structure for controlling vibration of main shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216989890U true CN216989890U (en) | 2022-07-19 |
Family
ID=82391367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220233520.7U Active CN216989890U (en) | 2022-01-27 | 2022-01-27 | Structure for controlling vibration of main shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216989890U (en) |
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2022
- 2022-01-27 CN CN202220233520.7U patent/CN216989890U/en active Active
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