Ultrasonic polishing main shaft

Abstract

The utility model relates to the technical field of machining, and discloses an ultrasonic polishing spindle which comprises a shell. The shaft core is arranged in an inner cavity of the shell; the ultrasonic transducer is arranged in an inner cavity of the shaft core, the end of the ultrasonic transducer protrudes out of the shell and the end of the shaft core, and the ultrasonic transducer is used for being connected with a grinding head; the driving mechanism is arranged at the end part of the shell and is connected with the shaft core through a coupling sleeve; and the driving mechanism drives the shaft core and the ultrasonic transducer to rotate. The driving mechanism drives the shaft core and the grinding head to rotate, the ultrasonic transducer drives the grinding head to conduct ultrasonic vibration, the grinding head conducts ultrasonic polishing on a workpiece, the overall structure is simple, installation and matching are reliable, the polishing effect is enhanced, the machining time is shortened, and the machining efficiency and the machining precision of parts are greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing, and more specifically, particularly relates to an ultrasonic polishing spindle. Background Art

[0002] In recent years, high requirements have been placed on the precision processing of hard and brittle materials such as functional ceramics, quartz wafers, planar or polyhedral crystals and optical devices. These materials are not only required to have extremely small flatness, extremely small surface roughness, and ultra-smooth surfaces, but also require that the two end faces of the material be strictly parallel, without crystal orientation errors, and without surface metamorphic layers. Some even require nanometer-level or higher processing accuracy and damage-free surface processing quality. Polishing is an important method to achieve the final surface quality requirements of high-performance parts. Therefore, grinding and polishing technology, as one of the important technologies in mechanical processing technology, is increasingly widely used in mechanical processing.

[0003] However, traditional grinding and polishing have disadvantages such as low processing efficiency, high processing cost, low processing precision and unstable processing quality. In particular, traditional polishing is mostly contact polishing, which can easily cause difficulties such as polishing edge collapse and inability to polish fine structures. This limits the application of traditional grinding and polishing to a certain extent. Summary of the invention

[0004] The purpose of the utility model is to provide an ultrasonic polishing spindle to solve the technical problems existing in the prior art, which can drive the grinding head to rotate and ultrasonically vibrate to realize ultrasonic polishing, and can effectively improve the surface quality and polishing efficiency.

[0005] In order to solve the above problems, the technical solution adopted by the utility model is:

[0006] The utility model provides an ultrasonic polishing spindle, comprising:

[0007] case;

[0008] An axis core is arranged in the inner cavity of the shell;

[0009] An ultrasonic transducer is arranged in the inner cavity of the shaft core, and an end of the ultrasonic transducer protrudes from the shell and the end of the shaft core, and is used for connecting the grinding head;

[0010] The driving mechanism is arranged at the end of the shell and connected to the shaft core through a coupling sleeve; the driving mechanism drives the shaft core and the ultrasonic transducer to perform rotational motion.

[0011] Furthermore, the driving mechanism is arranged on the housing through a motor mounting plate, and a mounting sleeve is arranged between the motor mounting plate and the end of the housing.

[0012] Furthermore, a bearing group is arranged between the shell and the outer periphery of the shaft core, and a spacer sleeve is arranged to pre-tighten and limit the bearing group; a locking assembly is also sleeved on the outer periphery of the shaft core to lock the bearing group.

[0013] Furthermore, a slip ring is also arranged on the outer periphery of the coupling sleeve, and the slip ring is respectively connected to the ultrasonic transducer and the external ultrasonic power supply wire.

[0014] Furthermore, the coupling sleeve has corresponding first limiting protrusions and second limiting protrusions, the first limiting protrusion abuts against the end of the slip ring for limiting position; the second limiting protrusion is sleeved on the outer periphery of the shaft core.

[0015] Furthermore, the end positions of one side of the shaft core and the shell correspond to each other, and a spindle end cover is provided for connection and cooperation; the spindle end cover is provided with an end cover through hole for the end of the grinding head to pass through, and a limiting protrusion is also provided on the end surface of the spindle end cover, and the limiting steps on the limiting protrusion are respectively connected and cooperated with the ends of the shaft core and the shell.

[0016] Furthermore, a vent hole is provided on the motor mounting plate, a vent groove communicating with the vent hole is provided on the coupling sleeve, and the vent groove is communicated with the inner cavity of the shaft core;

[0017] And / or, an annular groove or a spiral groove is provided on the inner wall of the shaft core.

[0018] Furthermore, an insulating sleeve is provided between the shaft core and the ultrasonic transducer, and the insulating sleeve corresponds to the position of the piezoelectric ceramic sheet in the ultrasonic transducer.

[0019] Furthermore, a pressing sleeve is arranged in the shaft core, a mounting boss is arranged on the inner wall of the shaft core, an insulating sleeve and a pressing sleeve are arranged on the mounting boss in sequence, and two ends of the pressing sleeve are respectively abutted against the coupling sleeve and the insulating sleeve.

[0020] Furthermore, the main shaft also includes a wireless sensing module, which includes a power receiving module and a power supply module arranged along the axial direction of the shell and in the insulating sleeve, the power receiving module is arranged at the end of the ultrasonic transducer and is connected by a wire; the power supply module is abutted and matched with the pressing sleeve and connected to the slip ring wire.

[0021] Compared with the prior art, the beneficial effects of the utility model are:

[0022] In the utility model, the shaft core and the grinding head are driven to rotate by a driving mechanism, and the grinding head is driven to perform ultrasonic vibration by an ultrasonic transducer, so that the grinding head performs ultrasonic polishing on the workpiece, that is, a rotation function is added on the basis of high-power ultrasonic vibration. During the processing, the rotation of the grinding head enhances the fluidity of the abrasive. The overall structure is simple and the installation and matching are reliable, which enhances the polishing effect and shortens the processing time, and also greatly improves the processing efficiency and processing accuracy of parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the scheme of the utility model, the following is a brief introduction to the drawings required for the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0024] Figure 1 This is a structural diagram of the first embodiment of the ultrasonic polishing spindle in the utility model.

[0025] Figure 2 The utility model is a schematic diagram of the installation of the ultrasonic polishing spindle embodiment 1 and the grinding head.

[0026] Figure 3 This is another structural diagram of the first embodiment of the ultrasonic polishing spindle in the utility model.

[0027] Figure 4 It is a partial schematic diagram of the first embodiment of the ultrasonic polishing spindle in the utility model.

[0028] Figure 5 It is another partial schematic diagram of the first embodiment of the ultrasonic polishing spindle in the utility model.

[0029] Figure 6 It is a partial top view of the first embodiment of the ultrasonic polishing spindle in the utility model.

[0030] Figure 7 It is a partial schematic diagram of the second embodiment of the ultrasonic polishing spindle in the utility model.

[0031] The description of the accompanying drawings is as follows: 100-polishing spindle, 1-housing, 2-core, 3-ultrasonic transducer, 4-driving mechanism, 5-motor mounting plate, 6-coupling sleeve, 7-slip ring, 8-spindle end cover, 81-end cover through hole, 82-limiting protrusion, 9-mounting sleeve, 10-first bearing, 11-second bearing, 12-first spacer, 13-second spacer, 14-locking nut, 15-washer, 16-insulating sleeve, 17-pressing sleeve, 101-first mounting boss, 201-second mounting boss, 202-third mounting boss, 51-ventilation hole, 61-ventilation groove, 62-first limiting protrusion, 63-second limiting protrusion, 71-limiting recess, 181-power receiving module, 182-power supply module, 200-grinding head. DETAILED DESCRIPTION

[0032] Unless otherwise defined, all technical and scientific terms used in this document have the same meaning as commonly understood by technicians in the technical field of the present invention; the terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. For example, the directions or positions indicated by terms such as "length", "width", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", and "outside" are based on the directions or positions shown in the drawings, which are only for the convenience of description and cannot be understood as limitations on the present technical solution.

[0033] The terms "including" and "having" and any variations thereof in the specification and claims of the utility model and the above-mentioned drawings are intended to cover non-exclusive inclusions; the terms "first", "second", etc. in the specification and claims of the utility model or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In the specification and claims of the utility model and the above-mentioned drawings, when an element is referred to as "fixed to" or "mounted on" or "disposed on" or "connected to" another element, it may be directly or indirectly located on the other element. For example, when an element is referred to as "connected to" another element, it may be directly or indirectly connected to the other element.

[0034] In addition, the reference to "embodiment" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0035] Embodiment 1

[0036] See also Figure 1and Figure 2 As shown, the utility model provides an ultrasonic polishing spindle 100, comprising a housing 1, a shaft core 2, an ultrasonic transducer 3 and a driving mechanism 4.

[0037] The inner cavity of the shell 1 is provided with an axis core 2, and the ultrasonic transducer 3 is provided in the inner cavity of the axis core 2; the driving mechanism 4 is provided at the end of the shell 1, and the driving mechanism 4 is connected to the axis core 2 through a coupling sleeve 6, and the driving mechanism 4 drives the axis core 2 and drives the ultrasonic transducer 3 to rotate; the end of the ultrasonic transducer 3 protrudes from the ends of the shell 1 and the axis core 2, and is used to connect the grinding head 200 to realize ultrasonic polishing.

[0038] Specifically, the driving mechanism 4 and the grinding head 200 are located at two opposite ends of the shell 1, the shaft core 2 and the coupling sleeve 6 are arranged in the inner cavity of the shell 1 along the axial direction of the shell 1, and the end of the coupling sleeve 6 is sleeved on the outer periphery of the shaft core 2 to achieve reliable connection and cooperation between the two. The ultrasonic transducer 3 is fixedly connected to the end of the shaft core 2, that is, the power of the driving mechanism 4 can be transmitted to the shaft core 2, driving the ultrasonic transducer 3 and the grinding head 200 to rotate, and the ultrasonic transducer 3 drives the grinding head 200 to perform ultrasonic vibration, thereby realizing ultrasonic polishing processing of the material surface.

[0039] Furthermore, the driving mechanism 4 is arranged on the housing 1 through the motor mounting plate 5 for easy installation; in order to facilitate the installation and coordination of other components, a mounting sleeve 9 is also arranged between the motor mounting plate 5 and the end of the housing 1.

[0040] It is understandable that the mounting sleeve 9, the motor mounting plate 5 and the shell 1 can be an integrated structure, or the mounting sleeve 9 and the shell 1 can be an integrated structure, or the mounting sleeve 9 and the motor mounting plate 5 can be an integrated structure, all of which can achieve overall connection and cooperation.

[0041] For further information, see Figure 3 to Figure 6 As shown, a bearing group (10, 11) is arranged between the housing 1 and the outer periphery of the shaft core 2, and a spacer (12, 13) is arranged to pre-tighten and limit the bearing group, so that the shaft core 2 can reliably rotate in the housing 1.

[0042] Specifically, the bearing group includes a first bearing 10 and a second bearing 11 arranged along the axial direction of the housing 1, the first bearing 10 is close to the end of the housing 1, and the second bearing 11 is located in the middle of the housing 1, and both are sleeved on the outer periphery of the shaft core 2, which can reliably support the shaft core 2. A first spacer sleeve 12 is arranged between the first bearing 10 and the second bearing 11, and a second spacer sleeve 13 is arranged between the second bearing 11 and the corresponding end of the mounting sleeve 9, respectively, to pre-tighten and limit the first bearing 10 and the second bearing 11, so as to further ensure the reliability of the rotational movement of the shaft core 2.

[0043] Furthermore, in order to ensure the reliability of the installation of the bearing group, a locking assembly is also sleeved on the outer periphery of the shaft core 2, and the locking assembly is located on one side of the bearing group, and locks and limits the bearing group; a first mounting boss 101 is set on the inner wall of the shell 1, and a second mounting boss 201 is set on the outer periphery of the shaft core 2, and the positions of the first mounting boss 101 and the second mounting boss 201 correspond to each other, and are used to limit the installation of the bearing group.

[0044] Specifically, the first bearing 10 is located on the corresponding first mounting boss 101 and second mounting boss 201 , and the locking assembly is located on one side of the second bearing 11 , which can ensure that both the first bearing 10 and the second bearing 11 are reliably installed.

[0045] In this embodiment, the locking assembly includes a locking nut 14 and a washer 15 which are sequentially sleeved on the outer periphery of the shaft core 2. The washer 15 and the locking nut 14 are arranged along the axial direction of the housing 1. The washer 15 is close to the second bearing 11. The structure is simple and can ensure the reliability of the installation of the bearing group. Of course, in other embodiments, the locking assembly can also adopt other structures to achieve reliable installation of the bearing group.

[0046] Furthermore, an insulating sleeve 16 is provided between the shaft core 2 and the ultrasonic transducer 3, and the insulating sleeve 16 corresponds to the position of the piezoelectric ceramic sheet in the ultrasonic transducer 3. Since the ultrasonic transducer 3 generates a high voltage when connected to an external ultrasonic power source, the piezoelectric ceramic sheet of the ultrasonic transducer 3 and the shaft core 2 are isolated by the insulating sleeve 16, thereby ensuring the reliability of the operation of both the shaft core 2 and the ultrasonic transducer 3.

[0047] A pressing sleeve 17 is further arranged in the shaft core 2, one end of the pressing sleeve 17 abuts against the coupling sleeve 6, and the other end of the pressing sleeve 17 abuts against the insulating sleeve 16, so as to ensure the reliability of the installation of the overall structure.

[0048] Specifically, a third mounting boss 202 is disposed on the inner wall of the shaft core 2 , and an insulating sleeve 16 and a pressing sleeve 17 are sequentially disposed on the third mounting boss 202 , which facilitates installation and ensures reliable installation.

[0049] Furthermore, a slip ring 7 is provided on the outer periphery of the coupling sleeve 6, and the slip ring 7 is respectively connected to the ultrasonic transducer 3 and the external ultrasonic power supply through wires to prevent the wires from being entangled and affecting the operation of the main shaft when the shaft core 2 and the ultrasonic transducer 3 rotate. The electrical energy conversion by the slip ring 7 can ensure the reliability of the operation of the main shaft.

[0050] It is understandable that in some embodiments, there is no need to set a slip ring 7 on the outer periphery of the coupling sleeve 6. After the wire passes through the center hole of the coupling sleeve 6, it is only necessary to control the forward and reverse reciprocating motion of the driving mechanism 4, and the driving mechanism 4 can also drive the shaft core 2 to rotate, which simplifies the overall structure of the main shaft and reduces the cost.

[0051] Furthermore, the shaft core 2 and one end of the housing 1 correspond to each other, and a spindle end cover 8 is provided for connection and cooperation. The spindle end cover 8 is provided with an end cover through hole 81 for the end of the grinding head 20 to pass through, which is convenient for installation and ensures reliable connection. A limiting convex portion 82 is also provided on the end surface of the spindle end cover 8, and the limiting steps on the limiting convex portion 82 are respectively connected and cooperated with the ends of the shaft core 2 and the housing 1 to ensure the reliability of the connection.

[0052] It is understandable that the housing 1 and the spindle end cover 8 can be an integral structure, that is, the end cover through hole 81 and the limiting protrusion 82 are directly formed on the inner side of the end of the housing 1, and can also play the role of connecting with and limiting the shaft core 2.

[0053] For further information, see Figure 6 As shown, the motor mounting plate 5 is provided with a vent hole 51 , the coupling sleeve 6 is provided with a vent groove 61 connected with the vent hole 51 , and the vent groove 61 is connected with the inner cavity of the shaft core 2 ; the inner wall of the shaft core 2 is provided with an annular groove 203 .

[0054] Specifically, the cooling gas passes through the vent hole 51 through the vent groove 61, and then enters the inner cavity of the pressing sleeve 17 and the insulating sleeve 16 in turn, and enters the gap between the shaft core 2 and the ultrasonic transducer 3, that is, the heat-generating components of the ultrasonic transducer 3 are cooled. After cooling, the gas flows along the axial direction of the housing 1, and is discharged from the housing 1 of the spindle through the gap between the outer periphery of the end of the ultrasonic transducer 3 and the spindle end cover 8.

[0055] The contact area between the cooling gas and the outer periphery of the ultrasonic transducer 3 can be increased by providing the annular groove 203, and the annular groove 203 can be provided in multiple groups in parallel along the axial direction of the shaft core 2, so as to further improve the cooling efficiency of the ultrasonic transducer 3. In some embodiments, the inner wall of the shaft core 2 can also be provided with a spiral groove, and the cooling gas flows along the spiral direction of the spiral groove to take away the heat generated by the ultrasonic transducer 3 to achieve cooling.

[0056] Furthermore, the coupling sleeve 6 has corresponding first limiting protrusions 62 and second limiting protrusions 63, and the first limiting protrusions 62 abut against the end of the slip ring 7 for limiting position; the second limiting protrusions 63 are sleeved on the outer periphery of the shaft core 2 and abut against the locking nut 14 of the locking assembly for limiting position.

[0057] It is understandable that a limiting recess 71 can be provided at the end of the slip ring 7, and the limiting recess 71 is connected and matched with the first limiting protrusion 62, so as to ensure the reliability of the installation of the overall structure. Of course, a limiting protrusion can be provided on the slip ring 7, and a limiting recess can be provided on the coupling sleeve 6, which can also play a role of connection and matching.

[0058] In this embodiment, the driving mechanism 4 may use a servo motor to drive the shaft core 2 to rotate. The driving mechanism may also use other methods to drive the shaft core 2 to rotate, and both methods can meet the needs.

[0059] It is understandable that the ultrasonic transducer 3 can drive the grinding head 200 to perform single vibration or compound vibration according to actual processing needs to meet different processing requirements, thereby enhancing the polishing effect and improving the processing accuracy.

[0060] Embodiment 2

[0061] The biggest difference between the second embodiment and the first embodiment is that a wireless sensing module is added to the housing 1. Figure 7 As shown, the wireless sensing module includes a power receiving module 181 and a power supply module 182 arranged axially along the shell 1, the power receiving module 181 is arranged at the end of the ultrasonic transducer 3 and is connected by a wire; the power supply module 182 is abutted and matched with the pressing sleeve 17, and the power supply module 182 is connected to the slip ring 7 by a wire; the power receiving module 181 and the power supply module 182 are both arranged in the insulating sleeve 16.

[0062] In the second embodiment, the power receiving module 181 and the power supply module 182 are gap-matched for wireless power transmission. Compared with the ultrasonic transducer 3 directly connected to the external ultrasonic power supply, wireless power transmission can improve the transmission efficiency of electric energy and meet different processing requirements. The wireless sensing module is arranged in the insulating sleeve 16 and placed between the end of the ultrasonic transducer and the pressing sleeve 17, which can make full use of the installation space in the shaft core 2, and also limit the pressing sleeve 17 to ensure the reliability of the overall structure installation.

[0063] In the utility model, the shaft core 2 and the grinding head 200 are driven to rotate by the driving mechanism 4, and the grinding head 200 is driven to perform ultrasonic vibration by the ultrasonic transducer 3, so that the grinding head 200 performs ultrasonic polishing on the workpiece. The overall structure is simple and the installation and matching are reliable. The ultrasonic transducer 3 can be directly connected to the ultrasonic power supply for power transmission, and can also be connected to the ultrasonic power supply for wireless power transmission through a wireless sensing module, so as to meet different actual processing needs, thereby effectively improving the polishing surface quality and polishing efficiency.

[0064] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited by the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principle of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. An ultrasonic polishing spindle, characterized in that: include: case; An axis core is arranged in the inner cavity of the shell; An ultrasonic transducer is arranged in the inner cavity of the shaft core, and an end of the ultrasonic transducer protrudes from the shell and the end of the shaft core, and is used for connecting the grinding head; The driving mechanism is arranged at the end of the shell and connected to the shaft core through a coupling sleeve; the driving mechanism drives the shaft core and the ultrasonic transducer to perform rotational motion.

2. The ultrasonic polishing spindle according to claim 1, characterized in that: The driving mechanism is arranged on the housing through a motor mounting plate, and a mounting sleeve is arranged between the motor mounting plate and the end of the housing.

3. The ultrasonic polishing spindle according to claim 1, characterized in that: A bearing group is arranged between the shell and the outer periphery of the shaft core, and a spacer is arranged to pre-tighten and limit the bearing group; a locking component for locking the bearing group is also sleeved on the outer periphery of the shaft core.

4. The ultrasonic polishing spindle according to claim 1, characterized in that: A slip ring is also arranged on the outer periphery of the coupling sleeve, and the slip ring is respectively connected to the ultrasonic transducer and the external ultrasonic power supply wire.

5. The ultrasonic polishing spindle according to claim 4, characterized in that: The coupling sleeve is provided with a corresponding first limiting protrusion and a second limiting protrusion, wherein the first limiting protrusion abuts against the end of the slip ring for limiting; and the second limiting protrusion is sleeved on the outer periphery of the shaft core.

6. The ultrasonic polishing spindle according to claim 1, characterized in that: The ends of one side of the shaft core and the shell are positioned correspondingly, and a spindle end cover is provided for connection and cooperation; an end cover through hole for the end of the grinding head to pass through is provided on the spindle end cover, and a limiting protrusion is also provided on the end surface of the spindle end cover, and the limiting steps on the limiting protrusion are respectively connected and cooperated with the ends of the shaft core and the shell.

7. The ultrasonic polishing spindle according to claim 2, characterized in that: The motor mounting plate is provided with a vent hole, the coupling sleeve is provided with a vent groove connected with the vent hole, and the vent groove is connected with the inner cavity of the shaft core; And / or, an annular groove or a spiral groove is provided on the inner wall of the shaft core.

8. The ultrasonic polishing spindle according to claim 4, characterized in that: An insulating sleeve is arranged between the shaft core and the ultrasonic transducer, and the insulating sleeve corresponds to the position of the piezoelectric ceramic sheet in the ultrasonic transducer.

9. The ultrasonic polishing spindle according to claim 8, characterized in that: A pressing sleeve is also arranged in the shaft core, a mounting boss is arranged on the inner wall of the shaft core, an insulating sleeve and a pressing sleeve are arranged on the mounting boss in sequence, and two ends of the pressing sleeve are respectively in contact with the coupling sleeve and the insulating sleeve.

10. The ultrasonic polishing spindle according to claim 9, characterized in that: The main shaft also includes a wireless sensing module, which includes a power receiving module and a power supply module arranged along the axial direction of the shell and in the insulating sleeve. The power receiving module is arranged at the end of the ultrasonic transducer and is connected through a wire; the power supply module is abutted and matched with the pressing sleeve and connected to the slip ring wire.

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