Numerical control machine tool spindle core capable of reducing thermal deformation
By employing a cross-arranged carbon fiber channel and duct structure in the spindle core of a CNC machine tool, the problem of spindle thermal deformation was solved, improving machining accuracy and service life, while reducing weight and cost.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ACEHAWE SPINDLE TECHNOLOGY (SHENZHEN) CO LTD
- Filing Date
- 2025-07-16
- Publication Date
- 2026-06-23
AI Technical Summary
In existing technologies, the spindle core of CNC machine tools undergoes thermal deformation due to heat transfer during high-speed rotation, which affects machining accuracy and service life, and the carbon fiber shell is costly.
The heat exchange section is integrally formed by an internal reinforcement layer, an intermediate bonding layer and an external reinforcement layer, combined with a hollow layer filled with carbon fiber to form a cross-arranged channel and pore structure, which improves heat dissipation performance and enhances overall strength.
This reduces the thermal deformation of the spindle core at a temperature rise of 60°C, improves machining accuracy and spindle lifespan, while also reducing spindle core weight and improving dynamic performance and stability.
Smart Images
Figure CN224389993U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of CNC spindle technology, specifically to a CNC machine tool spindle core that can reduce thermal deformation. Background Technology
[0002] Electric spindles are a new technology in the field of CNC machine tools that integrates the machine tool spindle with the spindle motor. Together with linear motor technology and high-speed cutting tool technology, electric spindles have propelled high-speed machining into a new era. An electric spindle is a complete assembly where the motor rotor directly serves as the machine tool spindle, and the spindle unit housing is the motor base. Together with other components, it achieves the integration of the motor and the machine tool spindle. Electric spindles offer advantages such as compact structure, light weight, low inertia, low noise, and fast response. They also provide high speed and high power, simplifying machine tool design and facilitating spindle positioning, making them an ideal structure for high-speed spindle units.
[0003] In the field of high-speed and high-precision mold processing, some parts have high requirements for processing accuracy. However, during the high-speed rotation of the spindle, the heat generated by the bearing and motor parts is transferred to the spindle core, causing thermal deformation of the core and affecting the actual processing accuracy.
[0004] Chinese invention patent application number 201910237121.0 discloses an electric spindle, including a coaxially arranged spindle core, motor rotor, motor stator, cooling jacket, and outer shell. The motor rotor is fitted outside the spindle core, and the motor stator is fitted outside the motor rotor, with the motor rotor and motor stator rotatably connected. The cooling jacket is fitted outside the motor stator, and the outer shell is fitted outside the cooling jacket. A cooling channel exists between the cooling jacket and the outer shell, and the cooling channel is connected to an external coolant. The outer shell is made of carbon fiber. This patent's electric spindle outer shell is made of carbon fiber, replacing the metal outer shells used in the prior art. Carbon fiber has excellent heat dissipation properties, which improves the heat dissipation capacity of the outer shell, thereby improving the heat dissipation performance of the spindle core. Furthermore, the amount of thermal deformation during heating is small, which is beneficial for improving the machining accuracy of the electric spindle. At the same time, the carbon fiber outer shell reduces the weight of the electric spindle, facilitating handling and loading / unloading. However, this patent uses an entire carbon fiber outer shell, resulting in higher costs, and the spindle core still experiences thermal deformation during heating, affecting the machining accuracy and service life of the spindle. Summary of the Invention
[0005] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this utility model is to provide a CNC machine tool spindle core that can reduce thermal deformation.
[0006] The purpose of this utility model is achieved through the following technical solution: a CNC machine tool spindle core that can reduce thermal deformation, including an annular heat exchange part, the heat exchange part including an inner reinforcing layer, an intermediate bonding layer and an outer reinforcing layer arranged sequentially from the inside to the outside, the inner reinforcing layer, the intermediate bonding layer and the outer reinforcing layer are integrally formed, the outer periphery of the intermediate bonding layer is provided with a hollow layer, and the hollow layer is filled with carbon fiber.
[0007] Furthermore, the perforated layer annular array has a plurality of first channels and a plurality of second channels arranged axially, and the carbon fiber includes a first carbon fiber filled in the plurality of first channels and the plurality of second channels.
[0008] Furthermore, the number of the first channel and the number of the second channel are equal, the shapes of the first channel and the second channel are different, and a number of first channels and a number of second channels are arranged alternately.
[0009] Furthermore, the perforated layer annular array has several rows of first channels and several rows of second channels arranged radially, and the carbon fiber includes second carbon fibers radially filled in the several rows of first channels and several rows of second channels.
[0010] Furthermore, the number of rows of the first channel and the second channel are equal, the shapes of the first channel and the second channel are different, and several rows of the first channel and several rows of the second channel are arranged alternately.
[0011] Furthermore, the number of rows of the first channel corresponds to the number of the first passages, and each row of the first channel is opened on the outside of the corresponding first passage and communicates with the first passage.
[0012] Furthermore, the number of rows of the second channel corresponds to the number of the second channel, with each row of the second channel being opened on the outside of the corresponding second channel and connected to the second channel.
[0013] Furthermore, the hollowed-out linear array has several annular channels arranged circumferentially, and the carbon fiber includes a third carbon fiber circumferentially filled within the annular channels.
[0014] Furthermore, the number of annular channels corresponds to the number of first channels in each row, and each annular channel is opened inside the corresponding first channel and communicates with the first channel.
[0015] Furthermore, the first carbon fiber is arranged in a cross pattern with the second carbon fiber and the third carbon fiber.
[0016] Furthermore, the first channel is an isosceles trapezoid, the second channel is triangular, the first aperture is square, the second aperture is circular, and the longitudinal section of the annular channel is an isosceles trapezoid.
[0017] The beneficial effects of this utility model are as follows: The heat exchange part of the shaft core adopts a combination of carbon fiber and metal, which improves the heat dissipation performance of the shaft core and reduces the amount of thermal deformation when heated. This can reduce the deformation of the shaft core when the temperature rises by 60°C, improve the machining accuracy of the spindle, and extend the service life of the spindle. Furthermore, the integral molding of the internal reinforcing layer, the intermediate bonding layer, and the external reinforcing layer can improve the overall strength of the shaft core, while the hollow layer reduces the weight of the shaft core by filling it with carbon fiber, thereby improving the dynamic performance and stability of rotation. Attached Figure Description
[0018] Figure 1 This is a perspective view of the present invention.
[0019] Figure 2 This is a bottom view of the present invention.
[0020] Figure 3 This is a side view of the present invention.
[0021] Figure 4 This is a cross-sectional view of the present invention.
[0022] Figure 5 This is a partial longitudinal cross-sectional view of this utility model.
[0023] The attached figures are labeled as follows: heat exchange section 1, internal reinforcing layer 11, intermediate bonding layer 12, external reinforcing layer 13, hollow layer 14, first channel 141, second channel 142, first pore 143, second pore 144, annular channel 145, carbon fiber 15, first carbon fiber 151, second carbon fiber 152, and third carbon fiber 153. Detailed Implementation
[0024] To facilitate understanding by those skilled in the art, the following description is provided in conjunction with embodiments and appendices. Figure 1-5 The present invention will be further described below. The content mentioned in the embodiments is not intended to limit the present invention.
[0025] See Figure 1-5 A CNC machine tool spindle core that can reduce thermal deformation includes an annular heat exchange section 1. The heat exchange section 1 includes an inner reinforcing layer 11, an intermediate bonding layer 12 and an outer reinforcing layer 13 arranged sequentially from the inside to the outside. The inner reinforcing layer 11, the intermediate bonding layer 12 and the outer reinforcing layer 13 are integrally formed. A hollow layer 14 is formed on the outer periphery of the intermediate bonding layer 12, and carbon fiber 15 is filled in the hollow layer 14.
[0026] The heat exchange section 1 of the shaft core of this utility model adopts a combination of carbon fiber 15 and metal to improve the heat dissipation performance of the shaft core. It also has a small amount of thermal deformation when heated, which can reduce the deformation of the shaft core when the temperature rises by 60°C, improve the machining accuracy of the spindle, and extend the service life of the spindle. Furthermore, the integral molding of the internal reinforcing layer 11, the intermediate bonding layer 12 and the external reinforcing layer 13 can improve the overall strength of the shaft core, while the hollow layer 14 reduces the weight of the shaft core by filling it with carbon fiber 15, thereby improving the dynamic performance and stability of rotation.
[0027] In this embodiment, the perforated layer 14 has an annular array of several first channels 141 and several second channels 142 arranged axially. The carbon fiber 15 includes first carbon fiber 151 filled within the several first channels 141 and several second channels 142. Specifically, the number of first channels 141 and second channels 142 is equal, the shapes of the first channels 141 and second channels 142 are different, and the several first channels 141 and several second channels 142 are arranged alternately. By using first carbon fiber 151 axially filled within the first channels 141 and second channels 142, the heat dissipation performance of the shaft core can be improved, the axial thermal deformation of the shaft core can be reduced, and the stiffness in the axial and bending directions can be enhanced.
[0028] In this embodiment, the perforated layer 14 has a ring array with several rows of radially arranged first channels 143 and several rows of second channels 144. The carbon fiber 15 includes second carbon fiber 152 radially filled within the rows of first channels 143 and several rows of second channels 144. Specifically, the number of rows of first channels 143 and second channels 144 is equal, the shapes of the first channels 143 and second channels 144 are different, and each row of first channels 143 and each row of second channels 144 is arranged alternately. By using second carbon fiber 152 radially filled within the first channels 143 and second channels 144, the heat dissipation performance of the shaft core can be improved, and the radial thermal deformation of the shaft core can be reduced.
[0029] In this embodiment, the number of rows of the first channels 143 corresponds to the number of the first channels 141. Each row of first channels 143 is opened on the outside of the corresponding first channel 141 and communicates with the first channel 141. The above structure facilitates the interlocking connection of the first carbon fiber 151 and the second carbon fiber 152.
[0030] In this embodiment, the number of rows of the second channels 144 corresponds to the number of the second channels 142. Each row of second channels 144 is opened on the outside of the corresponding second channel 142 and communicates with the second channel 142. The above structure facilitates the interlocking connection of the first carbon fiber 151 and the second carbon fiber 152.
[0031] In this embodiment, the linear array of the hollow layer 14 has several annular channels 145 arranged circumferentially, and the carbon fiber 15 includes a third carbon fiber 153 circumferentially filled within the annular channels 145. Specifically, the number of annular channels 145 corresponds to the number of first channels 143 in each row, and each annular channel 145 is opened inside the corresponding first channel 143 and communicates with the first channel 143. By using the third carbon fiber 153 circumferentially filled within the annular channels 145, the heat dissipation performance of the shaft core can be improved, and the circumferential thermal deformation of the shaft core can be reduced.
[0032] In this embodiment, the first carbon fiber 151, the second carbon fiber 152, and the third carbon fiber 153 are arranged in a cross pattern. This invention improves the heat dissipation performance of the spindle by employing an axially filled first carbon fiber 151, a radially filled second carbon fiber 152, and a circumferentially filled third carbon fiber 153 arranged in a cross pattern. Furthermore, it results in less thermal deformation when heated, reducing the deformation of the spindle at a temperature rise of 60°C, improving the machining accuracy of the spindle, and extending the service life of the spindle.
[0033] In this embodiment, the carbon fiber is selected from T300, T700, T800 or T1000; the specification of the carbon fiber is selected from 3K, 6K or 12K.
[0034] In this embodiment, the first channel 141 is an isosceles trapezoid, the second channel 142 is triangular, the first hole 143 is square, the second hole 144 is circular, and the longitudinal section of the annular channel 145 is an isosceles trapezoid. The above structure improves the heat dissipation performance of the shaft core and reduces the amount of thermal deformation when the shaft core is heated.
[0035] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this utility model are within the protection scope of this utility model.
Claims
1. A CNC machine tool spindle core that can reduce thermal deformation, comprising an annular heat exchange section, characterized in that: The heat exchange section includes an internal reinforcing layer, an intermediate bonding layer and an external reinforcing layer arranged sequentially from the inside to the outside. The internal reinforcing layer, the intermediate bonding layer and the external reinforcing layer are integrally formed. A hollow layer is formed on the outer periphery of the intermediate bonding layer, and the hollow layer is filled with carbon fiber.
2. A CNC machine tool spindle core that can reduce thermal deformation according to claim 1, characterized in that: The perforated annular array has a plurality of first channels and a plurality of second channels arranged axially, and the carbon fiber includes a first carbon fiber filled in the plurality of first channels and the plurality of second channels.
3. A CNC machine tool spindle core that can reduce thermal deformation according to claim 2, characterized in that: The number of the first channel and the number of the second channel are equal, the shapes of the first channel and the second channel are different, and a number of first channels and a number of second channels are arranged alternately.
4. A CNC machine tool spindle core that can reduce thermal deformation according to claim 2, characterized in that: The perforated annular array has several rows of first channels and several rows of second channels arranged radially, and the carbon fiber includes second carbon fibers that are radially filled in the several rows of first channels and several rows of second channels.
5. A CNC machine tool spindle core that can reduce thermal deformation according to claim 4, characterized in that: The number of rows of the first channel and the second channel are equal, the shapes of the first channel and the second channel are different, and several rows of the first channel and several rows of the second channel are arranged alternately.
6. A CNC machine tool spindle core that can reduce thermal deformation according to claim 4, characterized in that: The number of rows of the first channel corresponds to the number of the first passages. Each row of the first channel is opened on the outside of the corresponding first passage and is connected to the first passage.
7. A CNC machine tool spindle core that can reduce thermal deformation according to claim 4, characterized in that: The number of rows of the second channel corresponds to the number of the second channel. Each row of the second channel is opened on the outside of the corresponding second channel and is connected to the second channel.
8. A CNC machine tool spindle core that can reduce thermal deformation according to claim 4, characterized in that: The hollowed-out linear array has several annular channels arranged circumferentially, and the carbon fiber includes a third carbon fiber that is circumferentially filled in the annular channels.
9. A CNC machine tool spindle core that can reduce thermal deformation according to claim 8, characterized in that: The number of annular channels corresponds to the number of first channels in each row, and each annular channel is opened inside the corresponding first channel and communicates with the first channel.
10. A CNC machine tool spindle core that can reduce thermal deformation according to claim 8, characterized in that: The first carbon fiber is arranged in a cross pattern with the second carbon fiber and the third carbon fiber.