Vibration spindle and circuit board processing apparatus

Abstract

The application provides a vibration spindle and a circuit board processing device. The vibration spindle comprises a bearing assembly, a shaft core and a magnetic induction assembly. The shaft core is rotatably arranged in the bearing assembly. The magnetic induction assembly comprises a first magnetic induction part and a second magnetic induction part. The first magnetic induction part is arranged on the shaft core, and the second magnetic induction part is arranged around the shaft core. The second magnetic induction part can generate an alternating magnetic field with a reciprocating change of the magnetic pole direction. The alternating magnetic field is used to drive the first magnetic induction part to generate a reciprocating motion along the axis direction of the shaft core, so as to drive the shaft core to reciprocate along the axis direction relative to the bearing assembly. A cutter installed at the front end of the shaft core is superimposed with an axial high-frequency micro-amplitude vibration while rotating, so that the cutting edge of the cutter is periodically contacted and separated with the workpiece material in the drilling process, the drilling resistance is effectively reduced, the stability and processing efficiency of the drilling process are improved, and higher precision and better quality micro-holes are obtained.

Description

Technical Field

[0001] This application belongs to the technical field of circuit board processing equipment, and more specifically, relates to a vibrating spindle and circuit board processing equipment. Background Technology

[0002] In the drilling process of circuit boards, conventional methods mainly rely on the spindle of the drilling equipment to drive the cutting tool to rotate at high speed, and the spindle is driven by a motor to feed axially, so that the tool penetrates the board material to complete the drilling operation. However, with the continuous updating of circuit board materials and the gradual increase in the number of board layers, especially in the application scenarios of high-precision micro-hole machining, the traditional spindle structure and corresponding processing equipment have gradually revealed their inadequacy. During drilling, defects such as burrs, flash, or interlayer tearing occur due to sudden changes in the stress on the board material, which seriously affects the drilling quality. Therefore, there is an urgent need for a new type of spindle and processing equipment to solve the current processing quality problems. Utility Model Content

[0003] This application aims to provide a vibratory spindle and circuit board processing equipment to solve the technical problem of low drilling quality of circuit boards in the prior art.

[0004] To achieve the above objectives, the technical solution adopted in this application is as follows: A vibrating spindle is provided, comprising: Bearing assembly; A shaft is rotatably mounted on the bearing assembly, and a machining tool is clamped at one end; A bushing, wherein a receiving space is provided inside the bushing, and the bearing assembly and the shaft core pass through the receiving space; A magnetic induction assembly includes a first magnetic induction element and a second magnetic induction element, wherein the first magnetic induction element is disposed on the shaft core and the second magnetic induction element is disposed around the shaft core; The second magnetic induction element can generate an alternating magnetic field with reciprocating magnetic pole direction. The alternating magnetic field is used to drive the first magnetic induction element to reciprocate along the axial direction of the shaft core, so as to drive the shaft core to reciprocate relative to the bearing assembly along its axial direction, thereby driving the machining tool to achieve vibration machining.

[0005] The beneficial effects of this vibrating spindle are as follows: Driven by the aforementioned magnetic induction components, the tool mounted at the front end of the spindle can simultaneously undergo axial high-frequency micro-amplitude vibration without interrupting its rotational motion. This causes the cutting edge of the tool to periodically contact and separate from the workpiece material during drilling, forming a dynamic intermittent cutting mechanism. This mechanism effectively reduces the average cutting force during the cutting process and promotes material breakage through vibration impact, making the material easier to remove. Simultaneously, the cutting edge of the tool, under high-frequency vibration, continuously scrapes the machined hole wall, achieving secondary finishing of the hole wall, which helps improve the surface roughness and shape accuracy. Furthermore, axial vibration improves chip removal, preventing chips from clogging or entangled in the drill bit within the hole, thereby reducing drilling resistance, improving the stability and processing efficiency of the drilling process, and ultimately obtaining microholes with higher precision and quality.

[0006] As a further improvement to the above technical solution: Optionally, the first magnetic induction element is disposed in the portion of the shaft core located in the receiving space, and the second magnetic induction element is connected to the bushing.

[0007] Optionally, the bearing assembly includes a first bearing member and a second bearing member, the first bearing member and the second bearing member being spaced apart along the axial direction of the shaft core, and the second magnetic induction element being disposed between the first bearing member and the second bearing member.

[0008] Optionally, it also includes a shaft drive assembly, which is disposed in the receiving space. The shaft drive assembly includes a drive stator and a drive rotor. The drive stator is connected to the bushing, and the drive rotor is connected to the shaft core. The drive stator and the magnetic induction assembly are spaced apart along the axial direction of the shaft core.

[0009] Optionally, the first magnetic induction element is disposed at the clamping end of the shaft near the chuck, and the clamping end is located outside the receiving space.

[0010] Optionally, the bearing assembly includes a third bearing member and a fourth bearing member, which are arranged opposite to each other along the axial direction of the shaft core to form a floating space; The shaft core includes a shaft body and a turntable. The shaft body passes through the receiving space, and the turntable is connected to the shaft body and located within the floating space. The first magnetic induction element is disposed on the turntable, and the second magnetic induction element is disposed on the bearing assembly.

[0011] Optionally, the second magnetic induction element is disposed on the third bearing element, and the first magnetic induction element and the second magnetic induction element are disposed opposite to each other in the axial direction of the shaft core.

[0012] Optionally, it also includes a tool changing assembly and a mounting base. The tool changing assembly includes a piston, a piston rod, an elastic element, and a chuck. The mounting base has a piston chamber, in which the piston is disposed. The piston rod passes through the shaft core, and one end of the piston rod is connected to the piston, while the other end is used to drive the chuck to open and close when the piston moves. One end of the elastic element is connected to the mounting base, and the other end is connected to the piston.

[0013] Optionally, the first magnetic induction element is disposed at the tail end of the shaft core away from the chuck, and the tail end is located outside the receiving space; the mounting base is mounted on the side of the bushing near the tail end, and the second magnetic induction element is disposed on the mounting base.

[0014] Optionally, a floating space is formed inside the bearing assembly; the shaft core includes a shaft body and a turntable, the shaft body passes through the receiving space, and the turntable is connected to the shaft body and located within the floating space; The vibrating spindle also includes an air supply assembly, which is connected to the bearing assembly. When the air supply assembly supplies gas to the floating space, the turntable is suspended in the floating space.

[0015] Optionally, the shaft core is provided with a mounting groove, and the first magnetic induction element is embedded in the mounting groove, wherein the surface of the first magnetic induction element does not protrude from the surface of the shaft core.

[0016] Optionally, the first magnetic induction element is a permanent magnet, and the second magnetic induction element is an electromagnetic winding, wherein the electromagnetic winding is used to generate an alternating magnetic field with the magnetic pole direction changing back and forth.

[0017] This application also provides a circuit board processing equipment, including a machine base, a drive mechanism and the above-mentioned vibrating spindle. The drive mechanism is disposed on the machine base and connected to the vibrating spindle for driving the overall movement of the vibrating spindle. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A cross-sectional structural schematic diagram of the first vibratory air-bearing spindle provided in this application; Figure 2 A cross-sectional structural schematic diagram of the second type of vibratory air-bearing spindle provided in this application; Figure 3 for Figure 2 A magnified schematic diagram of the local structure; Figure 4 A cross-sectional structural schematic diagram of the third type of vibratory air-bearing spindle provided in this application.

[0020] The following are the labeling elements in the figure: 1. Bushing; 2. Shaft core; 21. Shaft body; 22. Turntable; 3. Bearing assembly; 31. First bearing component; 32. Second bearing component; 33. Third bearing component; 34. Fourth bearing component; 4. Magnetic induction assembly; 41. First magnetic induction element; 42. Second magnetic induction element; 5. Shaft drive assembly; 51. Drive stator; 52. Drive rotor; 7. Clamp; 8. Mounting bracket; 9. Tool changing assembly; 91. Piston; 92. Piston rod; 93. Elastic element. Detailed Implementation

[0021] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0022] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0026] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of this utility model.

[0027] In the following description, suffixes such as "circuit," "component," "assembly," or "unit" are used only for the purpose of describing this utility model and have no specific meaning in themselves. Therefore, they can be used in combination.

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0029] To improve the machining quality of the spindle during drilling operations, such as Figure 1 As shown, this application provides a vibrating spindle, which includes a spindle core 2, a bearing assembly 3 supporting the spindle core 2, and a magnetic induction assembly 4 for generating axial vibration.

[0030] The shaft core 2 is rotatably mounted on the bearing assembly 3, and a machining tool is clamped at one end of the shaft core 2. The bearing assembly 3 provides radial support for the shaft core 2 and ensures its rotational accuracy. The magnetic induction assembly 4 is composed of a first magnetic induction element 41 and a second magnetic induction element 42, wherein the first magnetic induction element 41 is mounted on the shaft core 2, and the second magnetic induction element 42 is arranged circumferentially around the shaft core 2. When working, the second magnetic induction element 42 generates an alternating magnetic field with periodically alternating magnetic pole directions. This alternating magnetic field acts on the first magnetic induction element 41, driving the first magnetic induction element 41 to perform high-frequency reciprocating motion along the axial direction of the shaft core 2, thereby driving the shaft core 2 and the machining tool clamped thereon to perform axial high-frequency vibration machining relative to the bearing assembly 3.

[0031] Driven by the magnetic induction component 4, the tool mounted at the front end of the spindle 2 can superimpose a high-frequency, low-amplitude axial vibration without interrupting its rotational motion. This causes the cutting edge of the tool to periodically contact and separate from the workpiece material during drilling, forming a dynamic intermittent cutting mechanism. This mechanism effectively reduces the average cutting force during the cutting process and promotes material breakage through vibration impact, making the material easier to remove. Simultaneously, the cutting edge of the tool continuously scrapes the machined hole wall under high-frequency vibration, achieving secondary finishing of the hole wall, which helps improve the surface roughness and shape accuracy. Furthermore, axial vibration improves chip removal, preventing chips from clogging or entangled in the drill bit, thereby reducing drilling resistance, improving the stability and processing efficiency of the drilling process, and ultimately obtaining microholes with higher precision and quality.

[0032] The vibrating spindle also includes a bushing 1, which has a receiving space. The bearing assembly 3 and the shaft core 2 pass through the receiving space. The first magnetic induction element 41 is specifically disposed in the portion of the shaft core 2 located in the receiving space, and the second magnetic induction element 42 is connected to the bushing 1. In addition, a circulating cooling water channel (not shown) is provided inside the bushing 1. This cooling water channel passes through the area where the bearing assembly 3 and the magnetic induction element 4 are located. Through the continuous flow of the cooling medium in it, the heat generated during the operation of the vibrating spindle is effectively dissipated, thereby providing cooling for the bearing assembly 3 and the magnetic induction element 4, ensuring the reliability and accuracy stability of the spindle during long-term operation.

[0033] The shaft core 2 is also provided with a mounting groove, and the first magnetic induction element 41 is embedded in the mounting groove. The surface of the first magnetic induction element 41 does not protrude from the surface of the shaft core 2, so as to ensure the smooth rotation of the shaft core 2 in the inner hole of the bearing assembly 3 and avoid interference between the first magnetic induction element 41 and the inner ring surface of the bearing assembly 3.

[0034] like Figure 1As shown, the bearing assembly 3 specifically includes a first bearing component 31 and a second bearing component 32. The first bearing component 31 and the second bearing component 32 are spaced apart along the axial direction of the shaft core 2. The second magnetic induction component 42 is specifically disposed between the first bearing component 31 and the second bearing component 32.

[0035] Specifically, the first bearing component 31 is a front air-bearing bearing, and the second bearing component 32 is a rear air-bearing bearing. In operation, after a certain pressure of gas is introduced, the front and rear air-bearing bearings respectively form a gas film with a certain rigidity between their mating surfaces and the shaft core 2. This gas film provides effective non-contact support for the shaft core 2, enabling not only low-friction, high-speed rotation of the shaft core 2, but also providing the necessary degrees of freedom for the axial high-frequency micro-amplitude vibration generated by the magnetic induction component 4.

[0036] To supply air to the air-bearing front and rear bearings, the bushing 1 is equipped with an air inlet and an internal air passage connected to it. High-pressure gas is introduced through the air inlet and transported to the air-bearing front and rear bearings through the air passage. Multiple throttling plugs are spaced circumferentially on both the air-bearing front and rear bearings, each with a throttling orifice. After flowing through these orifices, the high-pressure gas enters the gap space between the air-bearing front bearing and the shaft core 2, and between the air-bearing rear bearing and the shaft core 2, forming a gas film with a certain rigidity in the gap. To further improve the pressure distribution uniformity and support stability of the gas film, multiple layers of circumferentially spaced throttling plugs can be installed on both the air-bearing front and rear bearings.

[0037] The vibrating spindle also includes a core drive assembly 5 housed within the accommodating space. The core drive assembly 5 includes a drive stator 51 and a drive rotor 52. Specifically, the drive stator 51 is a drive winding mounted on the bushing 1, and the drive rotor 52 is a cage-shaped copper bar connected to the core 2. The drive stator 51 and the drive rotor 52 together constitute an AC asynchronous motor, used to drive the core 2 and the tool on its chuck 7 to rotate at high speed. When the magnetic induction assembly 4 is also disposed between the first bearing member 31 and the second bearing member 32, the magnetic induction assembly 4 and the drive assembly 5 are arranged at a certain interval along the axial direction of the core 2 to avoid mutual interference between the alternating magnetic field generated by the magnetic induction assembly 4 and the electromagnetic field of the drive assembly 5, thereby ensuring that the rotational motion and axial high-frequency vibration of the core 2 can work independently and stably in tandem.

[0038] In the magnetic induction assembly 4, the first magnetic induction element 41 can specifically be a permanent magnet, and the second magnetic induction element 42 can specifically be an electromagnetic winding. When an alternating current is applied, the electromagnetic winding generates an alternating magnetic field whose magnetic pole direction changes periodically. This alternating magnetic field interacts with the permanent magnet, and based on the attraction and repulsion between the magnetic poles, drives the permanent magnet to generate high-frequency reciprocating motion along the axial direction of the shaft core 2. Since the permanent magnet is connected to the shaft core 2, it directly drives the shaft core 2 to vibrate axially. Through the combination of the electromagnetic winding and the permanent magnet, precise electronic control of the axial vibration frequency and amplitude of the shaft core 2 can be achieved.

[0039] It is important to note that the first magnetic induction element 41 and the second magnetic induction element 42 are spaced a certain distance apart along the axial direction of the core 2. When a high-frequency alternating current is applied to the electromagnetic winding, the winding generates an excitation magnetic field, and its magnetic pole direction reverses frequently with the alternating changes in the direction of the applied current. When the instantaneous magnetic pole generated by the electromagnetic winding is opposite to the corresponding magnetic pole of the permanent magnet, an attractive force is generated between them. This attractive force drives the core 2 to move until the permanent magnet is approximately aligned with the electromagnetic winding along the axial direction. When the current direction changes, causing the magnetic pole direction of the electromagnetic winding to reverse, making its instantaneous magnetic pole the same as the corresponding magnetic pole of the permanent magnet, a repulsive force is generated between them. This repulsive force pushes the core 2 and the permanent magnet on it to move along the axial direction, causing them to be further away from the electromagnetic winding. Through continuous excitation by the high-frequency alternating current, the magnetic pole direction of the electromagnetic winding switches rapidly and continuously, thereby periodically generating attraction and repulsion, driving the core 2 to reciprocate at high frequency along its axial direction.

[0040] The second type of vibration spindle provided in this application is basically the same as the vibration spindle described above, with the main difference being: like Figure 2 and Figure 3 As shown, the first magnetic induction element 41 is disposed on the shaft core 2 near the clamping end of the chuck 7 used for mounting the tool, and the clamping end is located outside the receiving space formed by the bushing 1. The bearing assembly 3 includes a third bearing element 33 and a fourth bearing element 34, which are arranged opposite each other along the axial direction of the shaft core 2 and form a floating space between them. The shaft core 2 specifically includes a shaft body 21 and a radially protruding turntable 22. The shaft body 21 passes through the bearing assembly 3, and the turntable 22 is housed in the aforementioned floating space. The fourth bearing element 34 is specifically an air-bearing thrust plate, which has multiple throttling plugs on its end face facing the turntable 22. Each throttling plug has a throttling orifice with specific flow characteristics. After the high-pressure gas flows through these throttling orifices, it enters the gap space between the air-bearing thrust plate and the turntable 22, and forms an air film with a certain rigidity in the gap to support the turntable 22 to achieve low-friction high-speed rotation.

[0041] The first magnetic induction element 41 is disposed on the turntable 22, and the second magnetic induction element 42 is disposed on the third bearing component 33 of the bearing assembly 3, with the first magnetic induction element 41 and the second magnetic induction element 42 being disposed opposite to each other in the axial direction of the shaft core 2. When the second magnetic induction element 42 is energized, it generates an alternating magnetic field, and its magnetic pole direction reverses at a high frequency with the alternating change of the direction of the applied current. When the instantaneous magnetic pole generated by the second magnetic induction element 42 is opposite to the corresponding magnetic pole of the first magnetic induction element 41, an attractive force is generated between them, which drives the shaft core 2 to move. When the current direction changes, causing the magnetic pole direction of the second magnetic induction element 42 to reverse, making its instantaneous magnetic pole the same as the corresponding magnetic pole of the first magnetic induction element 41, a repulsive force is generated between them, which pushes the shaft core 2 to move in the opposite direction. Through continuous excitation by the high-frequency alternating current, periodic attraction and repulsion are generated, driving the shaft core 2 to reciprocate at a high frequency along its axial direction.

[0042] The vibrating spindle is also equipped with a dedicated air supply assembly (not shown), which is connected to the bearing assembly 3. When the air supply assembly supplies high-pressure gas from the floating space, the gas flows through the throttling holes of the throttling plugs on the air-bearing thrust plate, enters the tiny gap between the air-bearing thrust plate and the turntable 22, and forms an air film with a certain load-bearing stiffness within this gap. This air film allows the turntable 22 and even the entire shaft core 2 to obtain non-contact support in the axial direction, thereby suspending it in the floating space. At the same time, the second magnetic induction element 42 is disposed on the bearing assembly 3, specifically on the third bearing 33, and it is opposite to the first magnetic induction element 41 disposed on the turntable 22 in the axial direction of the shaft core 2. This arrangement allows the alternating magnetic field generated by the second magnetic induction element 42 to effectively drive the first magnetic induction element 41 and the shaft core 2 connected thereto, overcoming the air film stiffness and performing high-frequency reciprocating vibration along the axial direction.

[0043] The third type of vibration spindle provided in this application is basically the same as the vibration spindle described above, with the main difference being: like Figure 4 As shown, the first magnetic induction element 41 is disposed at the tail end of the shaft core 2 away from the chuck 7, and the tail end is located outside the receiving space. The vibrating spindle also includes a mounting base 8, which is mounted on the side of the bushing 1 near the tail end, and the second magnetic induction element 42 is disposed on the mounting base 8.

[0044] During operation, the second magnetic induction element 42 generates a corresponding alternating magnetic field after a high-frequency alternating current is applied. The direction of the magnetic poles of this magnetic field changes with the high-frequency alternation of the direction of the applied current. When the second magnetic induction element 42 generates an instantaneous opposite magnetic pole corresponding to the first magnetic induction element 41 due to the direction of the current, an axial electromagnetic attraction is generated between them. This attraction drives the shaft core 2 to move along its axis toward the second magnetic induction element 42. Subsequently, when the direction of the input current changes, causing the direction of the magnetic poles of the second magnetic induction element 42 to reverse, making its instantaneous magnetic pole the same as the corresponding magnetic pole of the first magnetic induction element 41, an axial electromagnetic repulsion force is generated between them. This repulsion force pushes the shaft core 2 to move in the opposite direction along its axis, i.e., away from the second magnetic induction element 42. By continuously applying a high-frequency alternating current to the second magnetic induction element 42, the above-mentioned attraction and repulsion are periodically and rapidly alternately excited, thereby effectively driving the shaft core 2 to overcome the stiffness of its support system and perform stable high-frequency reciprocating vibration along its axis, ultimately driving the tool mounted on the chuck 7 to achieve the required axial vibration cutting motion.

[0045] The vibratory spindle provided in this application further integrates a tool changing assembly 9, which includes a piston 91, a piston rod 92, an elastic element 93, and a chuck 7. A piston chamber is provided inside the mounting base 8, and the piston 91 is slidably disposed within this piston chamber. The piston rod 92 passes through a through hole provided inside the shaft core 2, with one end connected to the piston 91 and the other end extending to the working end of the shaft core 2, used to drive the chuck 7 mounted at this end to perform opening and closing actions when the piston 91 moves. One end of the elastic element 93 acts on the mounting base 8, and the other end is connected to the piston 91, its function being to provide a restoring force for the piston 91.

[0046] The collet 7 is mounted on the working end of the spindle core 2 and has a clamping structure for holding the cutting tool. A high-pressure spring is located between the collet 7 and the upper shoulder of the spindle core 2, providing continuous preload to the collet 7 to ensure its normal clamping state. One end of the collet 7 has a radially elastically opening jaw for accommodating and clamping the shank of the cutting tool, and the other end has a lever that engages with the end of the piston rod 92. When a cutting tool needs to be changed, high-pressure gas is introduced into the piston chamber of the mounting base 8. The gas pressure pushes the piston 91 and moves the piston rod 92 toward the collet 7. The end of the piston rod 92 strikes the lever of the collet 7, forcing the collet 7 to move forward axially against the preload of the high-pressure spring. This action causes the jaw at the front end of the collet 7 to open radially, thereby releasing and allowing the original cutting tool to be removed. Once the tool change operation is complete and the piston chamber stops receiving air, and the internal gas pressure is released, piston 91 and piston rod 92 move backward under the restoring force of elastic element 93. Meanwhile, chuck 7 synchronously returns to its original position under the preload of high-pressure spring, and its front jaws radially contract, thus firmly clamping the newly loaded tool. Through the above structure and operational process, the tool changing function of the vibrating spindle is realized.

[0047] This application also provides a circuit board processing device, which mainly includes a machine base, a drive mechanism, and a vibrating spindle as described in any of the preceding embodiments. The drive mechanism is fixedly mounted on the machine base and is connected to the vibrating spindle for transmission, used to drive and control the vibrating spindle to move along a predetermined trajectory in three-dimensional space. During operation, the drive mechanism positions the vibrating spindle to the processing position on the circuit board, and the vibrating spindle drives the tool at its end to simultaneously rotate at high speed and vibrate axially at high frequency, thereby processing high-quality microholes on the circuit board. This device integrates the dynamic cutting advantages of a vibrating spindle, which can improve the accuracy of drilling on circuit boards, the quality of hole walls, and the overall processing efficiency.

[0048] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A vibrating spindle, characterized in that, include: Bearing assembly; A shaft core is rotatably mounted on the bearing assembly, and a machining tool is clamped at one end; A bushing, wherein a receiving space is provided inside the bushing, and the bearing assembly and the shaft core pass through the receiving space; A magnetic induction assembly includes a first magnetic induction element and a second magnetic induction element, wherein the first magnetic induction element is disposed on the shaft core and the second magnetic induction element is disposed around the shaft core; The second magnetic induction element can generate an alternating magnetic field with reciprocating magnetic pole direction. The alternating magnetic field is used to drive the first magnetic induction element to reciprocate along the axial direction of the shaft core, so as to drive the shaft core to reciprocate relative to the bearing assembly along its axial direction, thereby driving the machining tool to achieve vibration machining.

2. The vibrating spindle as described in claim 1, characterized in that, The first magnetic induction element is disposed in the portion of the shaft core located in the receiving space, and the second magnetic induction element is connected to the bushing.

3. The vibrating spindle as described in claim 2, characterized in that, The bearing assembly includes a first bearing component and a second bearing component, which are spaced apart along the axial direction of the shaft core, and the second magnetic induction component is disposed between the first bearing component and the second bearing component.

4. The vibrating spindle as described in claim 3, characterized in that, It also includes a shaft drive assembly, which is disposed in the receiving space. The shaft drive assembly includes a drive stator and a drive rotor. The drive stator is connected to the bushing, and the drive rotor is connected to the shaft core. The drive stator and the magnetic induction assembly are spaced apart along the axial direction of the shaft core.

5. The vibrating spindle as described in claim 1, characterized in that, The first magnetic induction element is disposed at the clamping end of the shaft near the chuck, and the clamping end is located outside the receiving space.

6. The vibrating spindle as described in claim 5, characterized in that, The bearing assembly includes a third bearing component and a fourth bearing component, which are arranged opposite to each other along the axial direction of the shaft core to form a floating space; The shaft core includes a shaft body and a turntable. The shaft body passes through the receiving space, and the turntable is connected to the shaft body and located within the floating space. The first magnetic induction element is disposed on the turntable, and the second magnetic induction element is disposed on the bearing assembly.

7. The vibrating spindle as described in claim 6, characterized in that, The second magnetic induction element is disposed on the third bearing component, and the first magnetic induction element and the second magnetic induction element are disposed opposite to each other in the axial direction of the shaft core.

8. The vibrating spindle as described in claim 1, characterized in that, It also includes a tool changing assembly and a mounting base. The tool changing assembly includes a piston, a piston rod, an elastic element, and a chuck. The mounting base has a piston chamber, in which the piston is disposed. The piston rod passes through the shaft core, and one end of the piston rod is connected to the piston, while the other end is used to drive the chuck to open and close when the piston moves. One end of the elastic element is connected to the mounting base, and the other end is connected to the piston.

9. The vibrating spindle as described in claim 8, characterized in that, The first magnetic induction element is disposed at the tail end of the shaft core away from the chuck, and the tail end is located outside the receiving space; the mounting base is mounted on the side of the bushing near the tail end, and the second magnetic induction element is disposed on the mounting base.

10. The vibrating spindle as described in claim 1, characterized in that, The bearing assembly has a floating space inside; the shaft core includes a shaft body and a turntable, the shaft body passes through the receiving space, and the turntable is connected to the shaft body and located within the floating space; The vibrating spindle also includes an air supply assembly, which is connected to the bearing assembly. When the air supply assembly supplies gas to the floating space, the turntable is suspended in the floating space.

11. The vibrating spindle as described in claim 1, characterized in that, The shaft core is provided with a mounting groove, and the first magnetic induction element is embedded in the mounting groove. The surface of the first magnetic induction element does not protrude from the surface of the shaft core.

12. The vibrating spindle as described in claim 1, characterized in that, The first magnetic induction element is a permanent magnet, and the second magnetic induction element is an electromagnetic winding. The electromagnetic winding is used to generate an alternating magnetic field in which the magnetic pole direction changes back and forth.

13. A circuit board processing equipment, characterized in that, It includes a machine base, a drive mechanism, and a vibration spindle as described in any one of claims 1 to 12, wherein the drive mechanism is disposed on the machine base and connected to the vibration spindle, and is used to drive the vibration spindle to move as a whole.

Images